var __defProp = Object.defineProperty;
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
const REVISION = "170";
const MOUSE = { ROTATE: 0, DOLLY: 1, PAN: 2 };
const TOUCH = { ROTATE: 0, PAN: 1, DOLLY_PAN: 2, DOLLY_ROTATE: 3 };
const CullFaceNone = 0;
const CullFaceBack = 1;
const CullFaceFront = 2;
const PCFShadowMap = 1;
const PCFSoftShadowMap = 2;
const VSMShadowMap = 3;
const FrontSide = 0;
const BackSide = 1;
const DoubleSide = 2;
const NoBlending = 0;
const NormalBlending = 1;
const AdditiveBlending = 2;
const SubtractiveBlending = 3;
const MultiplyBlending = 4;
const CustomBlending = 5;
const AddEquation = 100;
const SubtractEquation = 101;
const ReverseSubtractEquation = 102;
const MinEquation = 103;
const MaxEquation = 104;
const ZeroFactor = 200;
const OneFactor = 201;
const SrcColorFactor = 202;
const OneMinusSrcColorFactor = 203;
const SrcAlphaFactor = 204;
const OneMinusSrcAlphaFactor = 205;
const DstAlphaFactor = 206;
const OneMinusDstAlphaFactor = 207;
const DstColorFactor = 208;
const OneMinusDstColorFactor = 209;
const SrcAlphaSaturateFactor = 210;
const ConstantColorFactor = 211;
const OneMinusConstantColorFactor = 212;
const ConstantAlphaFactor = 213;
const OneMinusConstantAlphaFactor = 214;
const NeverDepth = 0;
const AlwaysDepth = 1;
const LessDepth = 2;
const LessEqualDepth = 3;
const EqualDepth = 4;
const GreaterEqualDepth = 5;
const GreaterDepth = 6;
const NotEqualDepth = 7;
const MultiplyOperation = 0;
const MixOperation = 1;
const AddOperation = 2;
const NoToneMapping = 0;
const LinearToneMapping = 1;
const ReinhardToneMapping = 2;
const CineonToneMapping = 3;
const ACESFilmicToneMapping = 4;
const CustomToneMapping = 5;
const AgXToneMapping = 6;
const NeutralToneMapping = 7;
const AttachedBindMode = "attached";
const DetachedBindMode = "detached";
const UVMapping = 300;
const CubeReflectionMapping = 301;
const CubeRefractionMapping = 302;
const EquirectangularReflectionMapping = 303;
const EquirectangularRefractionMapping = 304;
const CubeUVReflectionMapping = 306;
const RepeatWrapping = 1e3;
const ClampToEdgeWrapping = 1001;
const MirroredRepeatWrapping = 1002;
const NearestFilter = 1003;
const NearestMipmapNearestFilter = 1004;
const NearestMipmapLinearFilter = 1005;
const LinearFilter = 1006;
const LinearMipmapNearestFilter = 1007;
const LinearMipmapLinearFilter = 1008;
const LinearMipMapLinearFilter = 1008;
const UnsignedByteType = 1009;
const ByteType = 1010;
const ShortType = 1011;
const UnsignedShortType = 1012;
const IntType = 1013;
const UnsignedIntType = 1014;
const FloatType = 1015;
const HalfFloatType = 1016;
const UnsignedShort4444Type = 1017;
const UnsignedShort5551Type = 1018;
const UnsignedInt248Type = 1020;
const UnsignedInt5999Type = 35902;
const AlphaFormat = 1021;
const RGBFormat = 1022;
const RGBAFormat = 1023;
const LuminanceFormat = 1024;
const LuminanceAlphaFormat = 1025;
const DepthFormat = 1026;
const DepthStencilFormat = 1027;
const RedFormat = 1028;
const RedIntegerFormat = 1029;
const RGFormat = 1030;
const RGIntegerFormat = 1031;
const RGBAIntegerFormat = 1033;
const RGB_S3TC_DXT1_Format = 33776;
const RGBA_S3TC_DXT1_Format = 33777;
const RGBA_S3TC_DXT3_Format = 33778;
const RGBA_S3TC_DXT5_Format = 33779;
const RGB_PVRTC_4BPPV1_Format = 35840;
const RGB_PVRTC_2BPPV1_Format = 35841;
const RGBA_PVRTC_4BPPV1_Format = 35842;
const RGBA_PVRTC_2BPPV1_Format = 35843;
const RGB_ETC1_Format = 36196;
const RGB_ETC2_Format = 37492;
const RGBA_ETC2_EAC_Format = 37496;
const RGBA_ASTC_4x4_Format = 37808;
const RGBA_ASTC_5x4_Format = 37809;
const RGBA_ASTC_5x5_Format = 37810;
const RGBA_ASTC_6x5_Format = 37811;
const RGBA_ASTC_6x6_Format = 37812;
const RGBA_ASTC_8x5_Format = 37813;
const RGBA_ASTC_8x6_Format = 37814;
const RGBA_ASTC_8x8_Format = 37815;
const RGBA_ASTC_10x5_Format = 37816;
const RGBA_ASTC_10x6_Format = 37817;
const RGBA_ASTC_10x8_Format = 37818;
const RGBA_ASTC_10x10_Format = 37819;
const RGBA_ASTC_12x10_Format = 37820;
const RGBA_ASTC_12x12_Format = 37821;
const RGBA_BPTC_Format = 36492;
const RGB_BPTC_SIGNED_Format = 36494;
const RGB_BPTC_UNSIGNED_Format = 36495;
const RED_RGTC1_Format = 36283;
const SIGNED_RED_RGTC1_Format = 36284;
const RED_GREEN_RGTC2_Format = 36285;
const SIGNED_RED_GREEN_RGTC2_Format = 36286;
const LoopOnce = 2200;
const LoopRepeat = 2201;
const LoopPingPong = 2202;
const InterpolateDiscrete = 2300;
const InterpolateLinear = 2301;
const InterpolateSmooth = 2302;
const ZeroCurvatureEnding = 2400;
const ZeroSlopeEnding = 2401;
const WrapAroundEnding = 2402;
const NormalAnimationBlendMode = 2500;
const AdditiveAnimationBlendMode = 2501;
const TrianglesDrawMode = 0;
const TriangleStripDrawMode = 1;
const TriangleFanDrawMode = 2;
const BasicDepthPacking = 3200;
const RGBADepthPacking = 3201;
const TangentSpaceNormalMap = 0;
const ObjectSpaceNormalMap = 1;
const NoColorSpace = "";
const SRGBColorSpace = "srgb";
const LinearSRGBColorSpace = "srgb-linear";
const LinearTransfer = "linear";
const SRGBTransfer = "srgb";
const KeepStencilOp = 7680;
const AlwaysStencilFunc = 519;
const NeverCompare = 512;
const LessCompare = 513;
const EqualCompare = 514;
const LessEqualCompare = 515;
const GreaterCompare = 516;
const NotEqualCompare = 517;
const GreaterEqualCompare = 518;
const AlwaysCompare = 519;
const StaticDrawUsage = 35044;
const DynamicDrawUsage = 35048;
const GLSL3 = "300 es";
const WebGLCoordinateSystem = 2e3;
const WebGPUCoordinateSystem = 2001;
class EventDispatcher {
  static {
    __name(this, "EventDispatcher");
  }
  addEventListener(type, listener) {
    if (this._listeners === void 0) this._listeners = {};
    const listeners = this._listeners;
    if (listeners[type] === void 0) {
      listeners[type] = [];
    }
    if (listeners[type].indexOf(listener) === -1) {
      listeners[type].push(listener);
    }
  }
  hasEventListener(type, listener) {
    if (this._listeners === void 0) return false;
    const listeners = this._listeners;
    return listeners[type] !== void 0 && listeners[type].indexOf(listener) !== -1;
  }
  removeEventListener(type, listener) {
    if (this._listeners === void 0) return;
    const listeners = this._listeners;
    const listenerArray = listeners[type];
    if (listenerArray !== void 0) {
      const index = listenerArray.indexOf(listener);
      if (index !== -1) {
        listenerArray.splice(index, 1);
      }
    }
  }
  dispatchEvent(event) {
    if (this._listeners === void 0) return;
    const listeners = this._listeners;
    const listenerArray = listeners[event.type];
    if (listenerArray !== void 0) {
      event.target = this;
      const array = listenerArray.slice(0);
      for (let i = 0, l = array.length; i < l; i++) {
        array[i].call(this, event);
      }
      event.target = null;
    }
  }
}
const _lut = ["00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "0a", "0b", "0c", "0d", "0e", "0f", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "1a", "1b", "1c", "1d", "1e", "1f", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "2a", "2b", "2c", "2d", "2e", "2f", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "3a", "3b", "3c", "3d", "3e", "3f", "40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "4a", "4b", "4c", "4d", "4e", "4f", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "5a", "5b", "5c", "5d", "5e", "5f", "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "6a", "6b", "6c", "6d", "6e", "6f", "70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "7a", "7b", "7c", "7d", "7e", "7f", "80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "8a", "8b", "8c", "8d", "8e", "8f", "90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "9a", "9b", "9c", "9d", "9e", "9f", "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7", "a8", "a9", "aa", "ab", "ac", "ad", "ae", "af", "b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7", "b8", "b9", "ba", "bb", "bc", "bd", "be", "bf", "c0", "c1", "c2", "c3", "c4", "c5", "c6", "c7", "c8", "c9", "ca", "cb", "cc", "cd", "ce", "cf", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "d8", "d9", "da", "db", "dc", "dd", "de", "df", "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7", "e8", "e9", "ea", "eb", "ec", "ed", "ee", "ef", "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9", "fa", "fb", "fc", "fd", "fe", "ff"];
let _seed = 1234567;
const DEG2RAD = Math.PI / 180;
const RAD2DEG = 180 / Math.PI;
function generateUUID() {
  const d0 = Math.random() * 4294967295 | 0;
  const d1 = Math.random() * 4294967295 | 0;
  const d2 = Math.random() * 4294967295 | 0;
  const d3 = Math.random() * 4294967295 | 0;
  const uuid = _lut[d0 & 255] + _lut[d0 >> 8 & 255] + _lut[d0 >> 16 & 255] + _lut[d0 >> 24 & 255] + "-" + _lut[d1 & 255] + _lut[d1 >> 8 & 255] + "-" + _lut[d1 >> 16 & 15 | 64] + _lut[d1 >> 24 & 255] + "-" + _lut[d2 & 63 | 128] + _lut[d2 >> 8 & 255] + "-" + _lut[d2 >> 16 & 255] + _lut[d2 >> 24 & 255] + _lut[d3 & 255] + _lut[d3 >> 8 & 255] + _lut[d3 >> 16 & 255] + _lut[d3 >> 24 & 255];
  return uuid.toLowerCase();
}
__name(generateUUID, "generateUUID");
function clamp(value, min, max2) {
  return Math.max(min, Math.min(max2, value));
}
__name(clamp, "clamp");
function euclideanModulo(n, m) {
  return (n % m + m) % m;
}
__name(euclideanModulo, "euclideanModulo");
function mapLinear(x, a1, a2, b1, b22) {
  return b1 + (x - a1) * (b22 - b1) / (a2 - a1);
}
__name(mapLinear, "mapLinear");
function inverseLerp(x, y, value) {
  if (x !== y) {
    return (value - x) / (y - x);
  } else {
    return 0;
  }
}
__name(inverseLerp, "inverseLerp");
function lerp(x, y, t) {
  return (1 - t) * x + t * y;
}
__name(lerp, "lerp");
function damp(x, y, lambda, dt) {
  return lerp(x, y, 1 - Math.exp(-lambda * dt));
}
__name(damp, "damp");
function pingpong(x, length = 1) {
  return length - Math.abs(euclideanModulo(x, length * 2) - length);
}
__name(pingpong, "pingpong");
function smoothstep(x, min, max2) {
  if (x <= min) return 0;
  if (x >= max2) return 1;
  x = (x - min) / (max2 - min);
  return x * x * (3 - 2 * x);
}
__name(smoothstep, "smoothstep");
function smootherstep(x, min, max2) {
  if (x <= min) return 0;
  if (x >= max2) return 1;
  x = (x - min) / (max2 - min);
  return x * x * x * (x * (x * 6 - 15) + 10);
}
__name(smootherstep, "smootherstep");
function randInt(low, high) {
  return low + Math.floor(Math.random() * (high - low + 1));
}
__name(randInt, "randInt");
function randFloat(low, high) {
  return low + Math.random() * (high - low);
}
__name(randFloat, "randFloat");
function randFloatSpread(range) {
  return range * (0.5 - Math.random());
}
__name(randFloatSpread, "randFloatSpread");
function seededRandom(s) {
  if (s !== void 0) _seed = s;
  let t = _seed += 1831565813;
  t = Math.imul(t ^ t >>> 15, t | 1);
  t ^= t + Math.imul(t ^ t >>> 7, t | 61);
  return ((t ^ t >>> 14) >>> 0) / 4294967296;
}
__name(seededRandom, "seededRandom");
function degToRad(degrees) {
  return degrees * DEG2RAD;
}
__name(degToRad, "degToRad");
function radToDeg(radians) {
  return radians * RAD2DEG;
}
__name(radToDeg, "radToDeg");
function isPowerOfTwo(value) {
  return (value & value - 1) === 0 && value !== 0;
}
__name(isPowerOfTwo, "isPowerOfTwo");
function ceilPowerOfTwo(value) {
  return Math.pow(2, Math.ceil(Math.log(value) / Math.LN2));
}
__name(ceilPowerOfTwo, "ceilPowerOfTwo");
function floorPowerOfTwo(value) {
  return Math.pow(2, Math.floor(Math.log(value) / Math.LN2));
}
__name(floorPowerOfTwo, "floorPowerOfTwo");
function setQuaternionFromProperEuler(q, a, b, c, order) {
  const cos = Math.cos;
  const sin = Math.sin;
  const c2 = cos(b / 2);
  const s2 = sin(b / 2);
  const c13 = cos((a + c) / 2);
  const s13 = sin((a + c) / 2);
  const c1_3 = cos((a - c) / 2);
  const s1_3 = sin((a - c) / 2);
  const c3_1 = cos((c - a) / 2);
  const s3_1 = sin((c - a) / 2);
  switch (order) {
    case "XYX":
      q.set(c2 * s13, s2 * c1_3, s2 * s1_3, c2 * c13);
      break;
    case "YZY":
      q.set(s2 * s1_3, c2 * s13, s2 * c1_3, c2 * c13);
      break;
    case "ZXZ":
      q.set(s2 * c1_3, s2 * s1_3, c2 * s13, c2 * c13);
      break;
    case "XZX":
      q.set(c2 * s13, s2 * s3_1, s2 * c3_1, c2 * c13);
      break;
    case "YXY":
      q.set(s2 * c3_1, c2 * s13, s2 * s3_1, c2 * c13);
      break;
    case "ZYZ":
      q.set(s2 * s3_1, s2 * c3_1, c2 * s13, c2 * c13);
      break;
    default:
      console.warn("THREE.MathUtils: .setQuaternionFromProperEuler() encountered an unknown order: " + order);
  }
}
__name(setQuaternionFromProperEuler, "setQuaternionFromProperEuler");
function denormalize(value, array) {
  switch (array.constructor) {
    case Float32Array:
      return value;
    case Uint32Array:
      return value / 4294967295;
    case Uint16Array:
      return value / 65535;
    case Uint8Array:
      return value / 255;
    case Int32Array:
      return Math.max(value / 2147483647, -1);
    case Int16Array:
      return Math.max(value / 32767, -1);
    case Int8Array:
      return Math.max(value / 127, -1);
    default:
      throw new Error("Invalid component type.");
  }
}
__name(denormalize, "denormalize");
function normalize$1(value, array) {
  switch (array.constructor) {
    case Float32Array:
      return value;
    case Uint32Array:
      return Math.round(value * 4294967295);
    case Uint16Array:
      return Math.round(value * 65535);
    case Uint8Array:
      return Math.round(value * 255);
    case Int32Array:
      return Math.round(value * 2147483647);
    case Int16Array:
      return Math.round(value * 32767);
    case Int8Array:
      return Math.round(value * 127);
    default:
      throw new Error("Invalid component type.");
  }
}
__name(normalize$1, "normalize$1");
const MathUtils = {
  DEG2RAD,
  RAD2DEG,
  generateUUID,
  clamp,
  euclideanModulo,
  mapLinear,
  inverseLerp,
  lerp,
  damp,
  pingpong,
  smoothstep,
  smootherstep,
  randInt,
  randFloat,
  randFloatSpread,
  seededRandom,
  degToRad,
  radToDeg,
  isPowerOfTwo,
  ceilPowerOfTwo,
  floorPowerOfTwo,
  setQuaternionFromProperEuler,
  normalize: normalize$1,
  denormalize
};
class Vector2 {
  static {
    __name(this, "Vector2");
  }
  constructor(x = 0, y = 0) {
    Vector2.prototype.isVector2 = true;
    this.x = x;
    this.y = y;
  }
  get width() {
    return this.x;
  }
  set width(value) {
    this.x = value;
  }
  get height() {
    return this.y;
  }
  set height(value) {
    this.y = value;
  }
  set(x, y) {
    this.x = x;
    this.y = y;
    return this;
  }
  setScalar(scalar) {
    this.x = scalar;
    this.y = scalar;
    return this;
  }
  setX(x) {
    this.x = x;
    return this;
  }
  setY(y) {
    this.y = y;
    return this;
  }
  setComponent(index, value) {
    switch (index) {
      case 0:
        this.x = value;
        break;
      case 1:
        this.y = value;
        break;
      default:
        throw new Error("index is out of range: " + index);
    }
    return this;
  }
  getComponent(index) {
    switch (index) {
      case 0:
        return this.x;
      case 1:
        return this.y;
      default:
        throw new Error("index is out of range: " + index);
    }
  }
  clone() {
    return new this.constructor(this.x, this.y);
  }
  copy(v) {
    this.x = v.x;
    this.y = v.y;
    return this;
  }
  add(v) {
    this.x += v.x;
    this.y += v.y;
    return this;
  }
  addScalar(s) {
    this.x += s;
    this.y += s;
    return this;
  }
  addVectors(a, b) {
    this.x = a.x + b.x;
    this.y = a.y + b.y;
    return this;
  }
  addScaledVector(v, s) {
    this.x += v.x * s;
    this.y += v.y * s;
    return this;
  }
  sub(v) {
    this.x -= v.x;
    this.y -= v.y;
    return this;
  }
  subScalar(s) {
    this.x -= s;
    this.y -= s;
    return this;
  }
  subVectors(a, b) {
    this.x = a.x - b.x;
    this.y = a.y - b.y;
    return this;
  }
  multiply(v) {
    this.x *= v.x;
    this.y *= v.y;
    return this;
  }
  multiplyScalar(scalar) {
    this.x *= scalar;
    this.y *= scalar;
    return this;
  }
  divide(v) {
    this.x /= v.x;
    this.y /= v.y;
    return this;
  }
  divideScalar(scalar) {
    return this.multiplyScalar(1 / scalar);
  }
  applyMatrix3(m) {
    const x = this.x, y = this.y;
    const e = m.elements;
    this.x = e[0] * x + e[3] * y + e[6];
    this.y = e[1] * x + e[4] * y + e[7];
    return this;
  }
  min(v) {
    this.x = Math.min(this.x, v.x);
    this.y = Math.min(this.y, v.y);
    return this;
  }
  max(v) {
    this.x = Math.max(this.x, v.x);
    this.y = Math.max(this.y, v.y);
    return this;
  }
  clamp(min, max2) {
    this.x = Math.max(min.x, Math.min(max2.x, this.x));
    this.y = Math.max(min.y, Math.min(max2.y, this.y));
    return this;
  }
  clampScalar(minVal, maxVal) {
    this.x = Math.max(minVal, Math.min(maxVal, this.x));
    this.y = Math.max(minVal, Math.min(maxVal, this.y));
    return this;
  }
  clampLength(min, max2) {
    const length = this.length();
    return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max2, length)));
  }
  floor() {
    this.x = Math.floor(this.x);
    this.y = Math.floor(this.y);
    return this;
  }
  ceil() {
    this.x = Math.ceil(this.x);
    this.y = Math.ceil(this.y);
    return this;
  }
  round() {
    this.x = Math.round(this.x);
    this.y = Math.round(this.y);
    return this;
  }
  roundToZero() {
    this.x = Math.trunc(this.x);
    this.y = Math.trunc(this.y);
    return this;
  }
  negate() {
    this.x = -this.x;
    this.y = -this.y;
    return this;
  }
  dot(v) {
    return this.x * v.x + this.y * v.y;
  }
  cross(v) {
    return this.x * v.y - this.y * v.x;
  }
  lengthSq() {
    return this.x * this.x + this.y * this.y;
  }
  length() {
    return Math.sqrt(this.x * this.x + this.y * this.y);
  }
  manhattanLength() {
    return Math.abs(this.x) + Math.abs(this.y);
  }
  normalize() {
    return this.divideScalar(this.length() || 1);
  }
  angle() {
    const angle = Math.atan2(-this.y, -this.x) + Math.PI;
    return angle;
  }
  angleTo(v) {
    const denominator = Math.sqrt(this.lengthSq() * v.lengthSq());
    if (denominator === 0) return Math.PI / 2;
    const theta = this.dot(v) / denominator;
    return Math.acos(clamp(theta, -1, 1));
  }
  distanceTo(v) {
    return Math.sqrt(this.distanceToSquared(v));
  }
  distanceToSquared(v) {
    const dx = this.x - v.x, dy = this.y - v.y;
    return dx * dx + dy * dy;
  }
  manhattanDistanceTo(v) {
    return Math.abs(this.x - v.x) + Math.abs(this.y - v.y);
  }
  setLength(length) {
    return this.normalize().multiplyScalar(length);
  }
  lerp(v, alpha) {
    this.x += (v.x - this.x) * alpha;
    this.y += (v.y - this.y) * alpha;
    return this;
  }
  lerpVectors(v1, v2, alpha) {
    this.x = v1.x + (v2.x - v1.x) * alpha;
    this.y = v1.y + (v2.y - v1.y) * alpha;
    return this;
  }
  equals(v) {
    return v.x === this.x && v.y === this.y;
  }
  fromArray(array, offset = 0) {
    this.x = array[offset];
    this.y = array[offset + 1];
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this.x;
    array[offset + 1] = this.y;
    return array;
  }
  fromBufferAttribute(attribute, index) {
    this.x = attribute.getX(index);
    this.y = attribute.getY(index);
    return this;
  }
  rotateAround(center, angle) {
    const c = Math.cos(angle), s = Math.sin(angle);
    const x = this.x - center.x;
    const y = this.y - center.y;
    this.x = x * c - y * s + center.x;
    this.y = x * s + y * c + center.y;
    return this;
  }
  random() {
    this.x = Math.random();
    this.y = Math.random();
    return this;
  }
  *[Symbol.iterator]() {
    yield this.x;
    yield this.y;
  }
}
class Matrix3 {
  static {
    __name(this, "Matrix3");
  }
  constructor(n11, n12, n13, n21, n22, n23, n31, n32, n33) {
    Matrix3.prototype.isMatrix3 = true;
    this.elements = [
      1,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      1
    ];
    if (n11 !== void 0) {
      this.set(n11, n12, n13, n21, n22, n23, n31, n32, n33);
    }
  }
  set(n11, n12, n13, n21, n22, n23, n31, n32, n33) {
    const te = this.elements;
    te[0] = n11;
    te[1] = n21;
    te[2] = n31;
    te[3] = n12;
    te[4] = n22;
    te[5] = n32;
    te[6] = n13;
    te[7] = n23;
    te[8] = n33;
    return this;
  }
  identity() {
    this.set(
      1,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      1
    );
    return this;
  }
  copy(m) {
    const te = this.elements;
    const me = m.elements;
    te[0] = me[0];
    te[1] = me[1];
    te[2] = me[2];
    te[3] = me[3];
    te[4] = me[4];
    te[5] = me[5];
    te[6] = me[6];
    te[7] = me[7];
    te[8] = me[8];
    return this;
  }
  extractBasis(xAxis, yAxis, zAxis) {
    xAxis.setFromMatrix3Column(this, 0);
    yAxis.setFromMatrix3Column(this, 1);
    zAxis.setFromMatrix3Column(this, 2);
    return this;
  }
  setFromMatrix4(m) {
    const me = m.elements;
    this.set(
      me[0],
      me[4],
      me[8],
      me[1],
      me[5],
      me[9],
      me[2],
      me[6],
      me[10]
    );
    return this;
  }
  multiply(m) {
    return this.multiplyMatrices(this, m);
  }
  premultiply(m) {
    return this.multiplyMatrices(m, this);
  }
  multiplyMatrices(a, b) {
    const ae = a.elements;
    const be = b.elements;
    const te = this.elements;
    const a11 = ae[0], a12 = ae[3], a13 = ae[6];
    const a21 = ae[1], a22 = ae[4], a23 = ae[7];
    const a31 = ae[2], a32 = ae[5], a33 = ae[8];
    const b11 = be[0], b12 = be[3], b13 = be[6];
    const b21 = be[1], b22 = be[4], b23 = be[7];
    const b31 = be[2], b32 = be[5], b33 = be[8];
    te[0] = a11 * b11 + a12 * b21 + a13 * b31;
    te[3] = a11 * b12 + a12 * b22 + a13 * b32;
    te[6] = a11 * b13 + a12 * b23 + a13 * b33;
    te[1] = a21 * b11 + a22 * b21 + a23 * b31;
    te[4] = a21 * b12 + a22 * b22 + a23 * b32;
    te[7] = a21 * b13 + a22 * b23 + a23 * b33;
    te[2] = a31 * b11 + a32 * b21 + a33 * b31;
    te[5] = a31 * b12 + a32 * b22 + a33 * b32;
    te[8] = a31 * b13 + a32 * b23 + a33 * b33;
    return this;
  }
  multiplyScalar(s) {
    const te = this.elements;
    te[0] *= s;
    te[3] *= s;
    te[6] *= s;
    te[1] *= s;
    te[4] *= s;
    te[7] *= s;
    te[2] *= s;
    te[5] *= s;
    te[8] *= s;
    return this;
  }
  determinant() {
    const te = this.elements;
    const a = te[0], b = te[1], c = te[2], d = te[3], e = te[4], f = te[5], g = te[6], h = te[7], i = te[8];
    return a * e * i - a * f * h - b * d * i + b * f * g + c * d * h - c * e * g;
  }
  invert() {
    const te = this.elements, n11 = te[0], n21 = te[1], n31 = te[2], n12 = te[3], n22 = te[4], n32 = te[5], n13 = te[6], n23 = te[7], n33 = te[8], t11 = n33 * n22 - n32 * n23, t12 = n32 * n13 - n33 * n12, t13 = n23 * n12 - n22 * n13, det = n11 * t11 + n21 * t12 + n31 * t13;
    if (det === 0) return this.set(0, 0, 0, 0, 0, 0, 0, 0, 0);
    const detInv = 1 / det;
    te[0] = t11 * detInv;
    te[1] = (n31 * n23 - n33 * n21) * detInv;
    te[2] = (n32 * n21 - n31 * n22) * detInv;
    te[3] = t12 * detInv;
    te[4] = (n33 * n11 - n31 * n13) * detInv;
    te[5] = (n31 * n12 - n32 * n11) * detInv;
    te[6] = t13 * detInv;
    te[7] = (n21 * n13 - n23 * n11) * detInv;
    te[8] = (n22 * n11 - n21 * n12) * detInv;
    return this;
  }
  transpose() {
    let tmp;
    const m = this.elements;
    tmp = m[1];
    m[1] = m[3];
    m[3] = tmp;
    tmp = m[2];
    m[2] = m[6];
    m[6] = tmp;
    tmp = m[5];
    m[5] = m[7];
    m[7] = tmp;
    return this;
  }
  getNormalMatrix(matrix4) {
    return this.setFromMatrix4(matrix4).invert().transpose();
  }
  transposeIntoArray(r) {
    const m = this.elements;
    r[0] = m[0];
    r[1] = m[3];
    r[2] = m[6];
    r[3] = m[1];
    r[4] = m[4];
    r[5] = m[7];
    r[6] = m[2];
    r[7] = m[5];
    r[8] = m[8];
    return this;
  }
  setUvTransform(tx, ty, sx, sy, rotation, cx, cy) {
    const c = Math.cos(rotation);
    const s = Math.sin(rotation);
    this.set(
      sx * c,
      sx * s,
      -sx * (c * cx + s * cy) + cx + tx,
      -sy * s,
      sy * c,
      -sy * (-s * cx + c * cy) + cy + ty,
      0,
      0,
      1
    );
    return this;
  }
  //
  scale(sx, sy) {
    this.premultiply(_m3.makeScale(sx, sy));
    return this;
  }
  rotate(theta) {
    this.premultiply(_m3.makeRotation(-theta));
    return this;
  }
  translate(tx, ty) {
    this.premultiply(_m3.makeTranslation(tx, ty));
    return this;
  }
  // for 2D Transforms
  makeTranslation(x, y) {
    if (x.isVector2) {
      this.set(
        1,
        0,
        x.x,
        0,
        1,
        x.y,
        0,
        0,
        1
      );
    } else {
      this.set(
        1,
        0,
        x,
        0,
        1,
        y,
        0,
        0,
        1
      );
    }
    return this;
  }
  makeRotation(theta) {
    const c = Math.cos(theta);
    const s = Math.sin(theta);
    this.set(
      c,
      -s,
      0,
      s,
      c,
      0,
      0,
      0,
      1
    );
    return this;
  }
  makeScale(x, y) {
    this.set(
      x,
      0,
      0,
      0,
      y,
      0,
      0,
      0,
      1
    );
    return this;
  }
  //
  equals(matrix) {
    const te = this.elements;
    const me = matrix.elements;
    for (let i = 0; i < 9; i++) {
      if (te[i] !== me[i]) return false;
    }
    return true;
  }
  fromArray(array, offset = 0) {
    for (let i = 0; i < 9; i++) {
      this.elements[i] = array[i + offset];
    }
    return this;
  }
  toArray(array = [], offset = 0) {
    const te = this.elements;
    array[offset] = te[0];
    array[offset + 1] = te[1];
    array[offset + 2] = te[2];
    array[offset + 3] = te[3];
    array[offset + 4] = te[4];
    array[offset + 5] = te[5];
    array[offset + 6] = te[6];
    array[offset + 7] = te[7];
    array[offset + 8] = te[8];
    return array;
  }
  clone() {
    return new this.constructor().fromArray(this.elements);
  }
}
const _m3 = /* @__PURE__ */ new Matrix3();
function arrayNeedsUint32(array) {
  for (let i = array.length - 1; i >= 0; --i) {
    if (array[i] >= 65535) return true;
  }
  return false;
}
__name(arrayNeedsUint32, "arrayNeedsUint32");
function createElementNS(name) {
  return document.createElementNS("http://www.w3.org/1999/xhtml", name);
}
__name(createElementNS, "createElementNS");
function createCanvasElement() {
  const canvas = createElementNS("canvas");
  canvas.style.display = "block";
  return canvas;
}
__name(createCanvasElement, "createCanvasElement");
const _cache = {};
function warnOnce(message) {
  if (message in _cache) return;
  _cache[message] = true;
  console.warn(message);
}
__name(warnOnce, "warnOnce");
function probeAsync(gl, sync, interval) {
  return new Promise(function(resolve, reject) {
    function probe() {
      switch (gl.clientWaitSync(sync, gl.SYNC_FLUSH_COMMANDS_BIT, 0)) {
        case gl.WAIT_FAILED:
          reject();
          break;
        case gl.TIMEOUT_EXPIRED:
          setTimeout(probe, interval);
          break;
        default:
          resolve();
      }
    }
    __name(probe, "probe");
    setTimeout(probe, interval);
  });
}
__name(probeAsync, "probeAsync");
function toNormalizedProjectionMatrix(projectionMatrix) {
  const m = projectionMatrix.elements;
  m[2] = 0.5 * m[2] + 0.5 * m[3];
  m[6] = 0.5 * m[6] + 0.5 * m[7];
  m[10] = 0.5 * m[10] + 0.5 * m[11];
  m[14] = 0.5 * m[14] + 0.5 * m[15];
}
__name(toNormalizedProjectionMatrix, "toNormalizedProjectionMatrix");
function toReversedProjectionMatrix(projectionMatrix) {
  const m = projectionMatrix.elements;
  const isPerspectiveMatrix = m[11] === -1;
  if (isPerspectiveMatrix) {
    m[10] = -m[10] - 1;
    m[14] = -m[14];
  } else {
    m[10] = -m[10];
    m[14] = -m[14] + 1;
  }
}
__name(toReversedProjectionMatrix, "toReversedProjectionMatrix");
const ColorManagement = {
  enabled: true,
  workingColorSpace: LinearSRGBColorSpace,
  /**
   * Implementations of supported color spaces.
   *
   * Required:
   *	- primaries: chromaticity coordinates [ rx ry gx gy bx by ]
   *	- whitePoint: reference white [ x y ]
   *	- transfer: transfer function (pre-defined)
   *	- toXYZ: Matrix3 RGB to XYZ transform
   *	- fromXYZ: Matrix3 XYZ to RGB transform
   *	- luminanceCoefficients: RGB luminance coefficients
   *
   * Optional:
   *  - outputColorSpaceConfig: { drawingBufferColorSpace: ColorSpace }
   *  - workingColorSpaceConfig: { unpackColorSpace: ColorSpace }
   *
   * Reference:
   * - https://www.russellcottrell.com/photo/matrixCalculator.htm
   */
  spaces: {},
  convert: /* @__PURE__ */ __name(function(color, sourceColorSpace, targetColorSpace) {
    if (this.enabled === false || sourceColorSpace === targetColorSpace || !sourceColorSpace || !targetColorSpace) {
      return color;
    }
    if (this.spaces[sourceColorSpace].transfer === SRGBTransfer) {
      color.r = SRGBToLinear(color.r);
      color.g = SRGBToLinear(color.g);
      color.b = SRGBToLinear(color.b);
    }
    if (this.spaces[sourceColorSpace].primaries !== this.spaces[targetColorSpace].primaries) {
      color.applyMatrix3(this.spaces[sourceColorSpace].toXYZ);
      color.applyMatrix3(this.spaces[targetColorSpace].fromXYZ);
    }
    if (this.spaces[targetColorSpace].transfer === SRGBTransfer) {
      color.r = LinearToSRGB(color.r);
      color.g = LinearToSRGB(color.g);
      color.b = LinearToSRGB(color.b);
    }
    return color;
  }, "convert"),
  fromWorkingColorSpace: /* @__PURE__ */ __name(function(color, targetColorSpace) {
    return this.convert(color, this.workingColorSpace, targetColorSpace);
  }, "fromWorkingColorSpace"),
  toWorkingColorSpace: /* @__PURE__ */ __name(function(color, sourceColorSpace) {
    return this.convert(color, sourceColorSpace, this.workingColorSpace);
  }, "toWorkingColorSpace"),
  getPrimaries: /* @__PURE__ */ __name(function(colorSpace) {
    return this.spaces[colorSpace].primaries;
  }, "getPrimaries"),
  getTransfer: /* @__PURE__ */ __name(function(colorSpace) {
    if (colorSpace === NoColorSpace) return LinearTransfer;
    return this.spaces[colorSpace].transfer;
  }, "getTransfer"),
  getLuminanceCoefficients: /* @__PURE__ */ __name(function(target, colorSpace = this.workingColorSpace) {
    return target.fromArray(this.spaces[colorSpace].luminanceCoefficients);
  }, "getLuminanceCoefficients"),
  define: /* @__PURE__ */ __name(function(colorSpaces) {
    Object.assign(this.spaces, colorSpaces);
  }, "define"),
  // Internal APIs
  _getMatrix: /* @__PURE__ */ __name(function(targetMatrix, sourceColorSpace, targetColorSpace) {
    return targetMatrix.copy(this.spaces[sourceColorSpace].toXYZ).multiply(this.spaces[targetColorSpace].fromXYZ);
  }, "_getMatrix"),
  _getDrawingBufferColorSpace: /* @__PURE__ */ __name(function(colorSpace) {
    return this.spaces[colorSpace].outputColorSpaceConfig.drawingBufferColorSpace;
  }, "_getDrawingBufferColorSpace"),
  _getUnpackColorSpace: /* @__PURE__ */ __name(function(colorSpace = this.workingColorSpace) {
    return this.spaces[colorSpace].workingColorSpaceConfig.unpackColorSpace;
  }, "_getUnpackColorSpace")
};
function SRGBToLinear(c) {
  return c < 0.04045 ? c * 0.0773993808 : Math.pow(c * 0.9478672986 + 0.0521327014, 2.4);
}
__name(SRGBToLinear, "SRGBToLinear");
function LinearToSRGB(c) {
  return c < 31308e-7 ? c * 12.92 : 1.055 * Math.pow(c, 0.41666) - 0.055;
}
__name(LinearToSRGB, "LinearToSRGB");
const REC709_PRIMARIES = [0.64, 0.33, 0.3, 0.6, 0.15, 0.06];
const REC709_LUMINANCE_COEFFICIENTS = [0.2126, 0.7152, 0.0722];
const D65 = [0.3127, 0.329];
const LINEAR_REC709_TO_XYZ = /* @__PURE__ */ new Matrix3().set(
  0.4123908,
  0.3575843,
  0.1804808,
  0.212639,
  0.7151687,
  0.0721923,
  0.0193308,
  0.1191948,
  0.9505322
);
const XYZ_TO_LINEAR_REC709 = /* @__PURE__ */ new Matrix3().set(
  3.2409699,
  -1.5373832,
  -0.4986108,
  -0.9692436,
  1.8759675,
  0.0415551,
  0.0556301,
  -0.203977,
  1.0569715
);
ColorManagement.define({
  [LinearSRGBColorSpace]: {
    primaries: REC709_PRIMARIES,
    whitePoint: D65,
    transfer: LinearTransfer,
    toXYZ: LINEAR_REC709_TO_XYZ,
    fromXYZ: XYZ_TO_LINEAR_REC709,
    luminanceCoefficients: REC709_LUMINANCE_COEFFICIENTS,
    workingColorSpaceConfig: { unpackColorSpace: SRGBColorSpace },
    outputColorSpaceConfig: { drawingBufferColorSpace: SRGBColorSpace }
  },
  [SRGBColorSpace]: {
    primaries: REC709_PRIMARIES,
    whitePoint: D65,
    transfer: SRGBTransfer,
    toXYZ: LINEAR_REC709_TO_XYZ,
    fromXYZ: XYZ_TO_LINEAR_REC709,
    luminanceCoefficients: REC709_LUMINANCE_COEFFICIENTS,
    outputColorSpaceConfig: { drawingBufferColorSpace: SRGBColorSpace }
  }
});
let _canvas;
class ImageUtils {
  static {
    __name(this, "ImageUtils");
  }
  static getDataURL(image) {
    if (/^data:/i.test(image.src)) {
      return image.src;
    }
    if (typeof HTMLCanvasElement === "undefined") {
      return image.src;
    }
    let canvas;
    if (image instanceof HTMLCanvasElement) {
      canvas = image;
    } else {
      if (_canvas === void 0) _canvas = createElementNS("canvas");
      _canvas.width = image.width;
      _canvas.height = image.height;
      const context = _canvas.getContext("2d");
      if (image instanceof ImageData) {
        context.putImageData(image, 0, 0);
      } else {
        context.drawImage(image, 0, 0, image.width, image.height);
      }
      canvas = _canvas;
    }
    if (canvas.width > 2048 || canvas.height > 2048) {
      console.warn("THREE.ImageUtils.getDataURL: Image converted to jpg for performance reasons", image);
      return canvas.toDataURL("image/jpeg", 0.6);
    } else {
      return canvas.toDataURL("image/png");
    }
  }
  static sRGBToLinear(image) {
    if (typeof HTMLImageElement !== "undefined" && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== "undefined" && image instanceof HTMLCanvasElement || typeof ImageBitmap !== "undefined" && image instanceof ImageBitmap) {
      const canvas = createElementNS("canvas");
      canvas.width = image.width;
      canvas.height = image.height;
      const context = canvas.getContext("2d");
      context.drawImage(image, 0, 0, image.width, image.height);
      const imageData = context.getImageData(0, 0, image.width, image.height);
      const data = imageData.data;
      for (let i = 0; i < data.length; i++) {
        data[i] = SRGBToLinear(data[i] / 255) * 255;
      }
      context.putImageData(imageData, 0, 0);
      return canvas;
    } else if (image.data) {
      const data = image.data.slice(0);
      for (let i = 0; i < data.length; i++) {
        if (data instanceof Uint8Array || data instanceof Uint8ClampedArray) {
          data[i] = Math.floor(SRGBToLinear(data[i] / 255) * 255);
        } else {
          data[i] = SRGBToLinear(data[i]);
        }
      }
      return {
        data,
        width: image.width,
        height: image.height
      };
    } else {
      console.warn("THREE.ImageUtils.sRGBToLinear(): Unsupported image type. No color space conversion applied.");
      return image;
    }
  }
}
let _sourceId = 0;
class Source {
  static {
    __name(this, "Source");
  }
  constructor(data = null) {
    this.isSource = true;
    Object.defineProperty(this, "id", { value: _sourceId++ });
    this.uuid = generateUUID();
    this.data = data;
    this.dataReady = true;
    this.version = 0;
  }
  set needsUpdate(value) {
    if (value === true) this.version++;
  }
  toJSON(meta) {
    const isRootObject = meta === void 0 || typeof meta === "string";
    if (!isRootObject && meta.images[this.uuid] !== void 0) {
      return meta.images[this.uuid];
    }
    const output = {
      uuid: this.uuid,
      url: ""
    };
    const data = this.data;
    if (data !== null) {
      let url;
      if (Array.isArray(data)) {
        url = [];
        for (let i = 0, l = data.length; i < l; i++) {
          if (data[i].isDataTexture) {
            url.push(serializeImage(data[i].image));
          } else {
            url.push(serializeImage(data[i]));
          }
        }
      } else {
        url = serializeImage(data);
      }
      output.url = url;
    }
    if (!isRootObject) {
      meta.images[this.uuid] = output;
    }
    return output;
  }
}
function serializeImage(image) {
  if (typeof HTMLImageElement !== "undefined" && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== "undefined" && image instanceof HTMLCanvasElement || typeof ImageBitmap !== "undefined" && image instanceof ImageBitmap) {
    return ImageUtils.getDataURL(image);
  } else {
    if (image.data) {
      return {
        data: Array.from(image.data),
        width: image.width,
        height: image.height,
        type: image.data.constructor.name
      };
    } else {
      console.warn("THREE.Texture: Unable to serialize Texture.");
      return {};
    }
  }
}
__name(serializeImage, "serializeImage");
let _textureId = 0;
class Texture extends EventDispatcher {
  static {
    __name(this, "Texture");
  }
  constructor(image = Texture.DEFAULT_IMAGE, mapping = Texture.DEFAULT_MAPPING, wrapS = ClampToEdgeWrapping, wrapT = ClampToEdgeWrapping, magFilter = LinearFilter, minFilter = LinearMipmapLinearFilter, format = RGBAFormat, type = UnsignedByteType, anisotropy = Texture.DEFAULT_ANISOTROPY, colorSpace = NoColorSpace) {
    super();
    this.isTexture = true;
    Object.defineProperty(this, "id", { value: _textureId++ });
    this.uuid = generateUUID();
    this.name = "";
    this.source = new Source(image);
    this.mipmaps = [];
    this.mapping = mapping;
    this.channel = 0;
    this.wrapS = wrapS;
    this.wrapT = wrapT;
    this.magFilter = magFilter;
    this.minFilter = minFilter;
    this.anisotropy = anisotropy;
    this.format = format;
    this.internalFormat = null;
    this.type = type;
    this.offset = new Vector2(0, 0);
    this.repeat = new Vector2(1, 1);
    this.center = new Vector2(0, 0);
    this.rotation = 0;
    this.matrixAutoUpdate = true;
    this.matrix = new Matrix3();
    this.generateMipmaps = true;
    this.premultiplyAlpha = false;
    this.flipY = true;
    this.unpackAlignment = 4;
    this.colorSpace = colorSpace;
    this.userData = {};
    this.version = 0;
    this.onUpdate = null;
    this.isRenderTargetTexture = false;
    this.pmremVersion = 0;
  }
  get image() {
    return this.source.data;
  }
  set image(value = null) {
    this.source.data = value;
  }
  updateMatrix() {
    this.matrix.setUvTransform(this.offset.x, this.offset.y, this.repeat.x, this.repeat.y, this.rotation, this.center.x, this.center.y);
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(source) {
    this.name = source.name;
    this.source = source.source;
    this.mipmaps = source.mipmaps.slice(0);
    this.mapping = source.mapping;
    this.channel = source.channel;
    this.wrapS = source.wrapS;
    this.wrapT = source.wrapT;
    this.magFilter = source.magFilter;
    this.minFilter = source.minFilter;
    this.anisotropy = source.anisotropy;
    this.format = source.format;
    this.internalFormat = source.internalFormat;
    this.type = source.type;
    this.offset.copy(source.offset);
    this.repeat.copy(source.repeat);
    this.center.copy(source.center);
    this.rotation = source.rotation;
    this.matrixAutoUpdate = source.matrixAutoUpdate;
    this.matrix.copy(source.matrix);
    this.generateMipmaps = source.generateMipmaps;
    this.premultiplyAlpha = source.premultiplyAlpha;
    this.flipY = source.flipY;
    this.unpackAlignment = source.unpackAlignment;
    this.colorSpace = source.colorSpace;
    this.userData = JSON.parse(JSON.stringify(source.userData));
    this.needsUpdate = true;
    return this;
  }
  toJSON(meta) {
    const isRootObject = meta === void 0 || typeof meta === "string";
    if (!isRootObject && meta.textures[this.uuid] !== void 0) {
      return meta.textures[this.uuid];
    }
    const output = {
      metadata: {
        version: 4.6,
        type: "Texture",
        generator: "Texture.toJSON"
      },
      uuid: this.uuid,
      name: this.name,
      image: this.source.toJSON(meta).uuid,
      mapping: this.mapping,
      channel: this.channel,
      repeat: [this.repeat.x, this.repeat.y],
      offset: [this.offset.x, this.offset.y],
      center: [this.center.x, this.center.y],
      rotation: this.rotation,
      wrap: [this.wrapS, this.wrapT],
      format: this.format,
      internalFormat: this.internalFormat,
      type: this.type,
      colorSpace: this.colorSpace,
      minFilter: this.minFilter,
      magFilter: this.magFilter,
      anisotropy: this.anisotropy,
      flipY: this.flipY,
      generateMipmaps: this.generateMipmaps,
      premultiplyAlpha: this.premultiplyAlpha,
      unpackAlignment: this.unpackAlignment
    };
    if (Object.keys(this.userData).length > 0) output.userData = this.userData;
    if (!isRootObject) {
      meta.textures[this.uuid] = output;
    }
    return output;
  }
  dispose() {
    this.dispatchEvent({ type: "dispose" });
  }
  transformUv(uv) {
    if (this.mapping !== UVMapping) return uv;
    uv.applyMatrix3(this.matrix);
    if (uv.x < 0 || uv.x > 1) {
      switch (this.wrapS) {
        case RepeatWrapping:
          uv.x = uv.x - Math.floor(uv.x);
          break;
        case ClampToEdgeWrapping:
          uv.x = uv.x < 0 ? 0 : 1;
          break;
        case MirroredRepeatWrapping:
          if (Math.abs(Math.floor(uv.x) % 2) === 1) {
            uv.x = Math.ceil(uv.x) - uv.x;
          } else {
            uv.x = uv.x - Math.floor(uv.x);
          }
          break;
      }
    }
    if (uv.y < 0 || uv.y > 1) {
      switch (this.wrapT) {
        case RepeatWrapping:
          uv.y = uv.y - Math.floor(uv.y);
          break;
        case ClampToEdgeWrapping:
          uv.y = uv.y < 0 ? 0 : 1;
          break;
        case MirroredRepeatWrapping:
          if (Math.abs(Math.floor(uv.y) % 2) === 1) {
            uv.y = Math.ceil(uv.y) - uv.y;
          } else {
            uv.y = uv.y - Math.floor(uv.y);
          }
          break;
      }
    }
    if (this.flipY) {
      uv.y = 1 - uv.y;
    }
    return uv;
  }
  set needsUpdate(value) {
    if (value === true) {
      this.version++;
      this.source.needsUpdate = true;
    }
  }
  set needsPMREMUpdate(value) {
    if (value === true) {
      this.pmremVersion++;
    }
  }
}
Texture.DEFAULT_IMAGE = null;
Texture.DEFAULT_MAPPING = UVMapping;
Texture.DEFAULT_ANISOTROPY = 1;
class Vector4 {
  static {
    __name(this, "Vector4");
  }
  constructor(x = 0, y = 0, z = 0, w = 1) {
    Vector4.prototype.isVector4 = true;
    this.x = x;
    this.y = y;
    this.z = z;
    this.w = w;
  }
  get width() {
    return this.z;
  }
  set width(value) {
    this.z = value;
  }
  get height() {
    return this.w;
  }
  set height(value) {
    this.w = value;
  }
  set(x, y, z, w) {
    this.x = x;
    this.y = y;
    this.z = z;
    this.w = w;
    return this;
  }
  setScalar(scalar) {
    this.x = scalar;
    this.y = scalar;
    this.z = scalar;
    this.w = scalar;
    return this;
  }
  setX(x) {
    this.x = x;
    return this;
  }
  setY(y) {
    this.y = y;
    return this;
  }
  setZ(z) {
    this.z = z;
    return this;
  }
  setW(w) {
    this.w = w;
    return this;
  }
  setComponent(index, value) {
    switch (index) {
      case 0:
        this.x = value;
        break;
      case 1:
        this.y = value;
        break;
      case 2:
        this.z = value;
        break;
      case 3:
        this.w = value;
        break;
      default:
        throw new Error("index is out of range: " + index);
    }
    return this;
  }
  getComponent(index) {
    switch (index) {
      case 0:
        return this.x;
      case 1:
        return this.y;
      case 2:
        return this.z;
      case 3:
        return this.w;
      default:
        throw new Error("index is out of range: " + index);
    }
  }
  clone() {
    return new this.constructor(this.x, this.y, this.z, this.w);
  }
  copy(v) {
    this.x = v.x;
    this.y = v.y;
    this.z = v.z;
    this.w = v.w !== void 0 ? v.w : 1;
    return this;
  }
  add(v) {
    this.x += v.x;
    this.y += v.y;
    this.z += v.z;
    this.w += v.w;
    return this;
  }
  addScalar(s) {
    this.x += s;
    this.y += s;
    this.z += s;
    this.w += s;
    return this;
  }
  addVectors(a, b) {
    this.x = a.x + b.x;
    this.y = a.y + b.y;
    this.z = a.z + b.z;
    this.w = a.w + b.w;
    return this;
  }
  addScaledVector(v, s) {
    this.x += v.x * s;
    this.y += v.y * s;
    this.z += v.z * s;
    this.w += v.w * s;
    return this;
  }
  sub(v) {
    this.x -= v.x;
    this.y -= v.y;
    this.z -= v.z;
    this.w -= v.w;
    return this;
  }
  subScalar(s) {
    this.x -= s;
    this.y -= s;
    this.z -= s;
    this.w -= s;
    return this;
  }
  subVectors(a, b) {
    this.x = a.x - b.x;
    this.y = a.y - b.y;
    this.z = a.z - b.z;
    this.w = a.w - b.w;
    return this;
  }
  multiply(v) {
    this.x *= v.x;
    this.y *= v.y;
    this.z *= v.z;
    this.w *= v.w;
    return this;
  }
  multiplyScalar(scalar) {
    this.x *= scalar;
    this.y *= scalar;
    this.z *= scalar;
    this.w *= scalar;
    return this;
  }
  applyMatrix4(m) {
    const x = this.x, y = this.y, z = this.z, w = this.w;
    const e = m.elements;
    this.x = e[0] * x + e[4] * y + e[8] * z + e[12] * w;
    this.y = e[1] * x + e[5] * y + e[9] * z + e[13] * w;
    this.z = e[2] * x + e[6] * y + e[10] * z + e[14] * w;
    this.w = e[3] * x + e[7] * y + e[11] * z + e[15] * w;
    return this;
  }
  divide(v) {
    this.x /= v.x;
    this.y /= v.y;
    this.z /= v.z;
    this.w /= v.w;
    return this;
  }
  divideScalar(scalar) {
    return this.multiplyScalar(1 / scalar);
  }
  setAxisAngleFromQuaternion(q) {
    this.w = 2 * Math.acos(q.w);
    const s = Math.sqrt(1 - q.w * q.w);
    if (s < 1e-4) {
      this.x = 1;
      this.y = 0;
      this.z = 0;
    } else {
      this.x = q.x / s;
      this.y = q.y / s;
      this.z = q.z / s;
    }
    return this;
  }
  setAxisAngleFromRotationMatrix(m) {
    let angle, x, y, z;
    const epsilon = 0.01, epsilon2 = 0.1, te = m.elements, m11 = te[0], m12 = te[4], m13 = te[8], m21 = te[1], m22 = te[5], m23 = te[9], m31 = te[2], m32 = te[6], m33 = te[10];
    if (Math.abs(m12 - m21) < epsilon && Math.abs(m13 - m31) < epsilon && Math.abs(m23 - m32) < epsilon) {
      if (Math.abs(m12 + m21) < epsilon2 && Math.abs(m13 + m31) < epsilon2 && Math.abs(m23 + m32) < epsilon2 && Math.abs(m11 + m22 + m33 - 3) < epsilon2) {
        this.set(1, 0, 0, 0);
        return this;
      }
      angle = Math.PI;
      const xx = (m11 + 1) / 2;
      const yy = (m22 + 1) / 2;
      const zz = (m33 + 1) / 2;
      const xy = (m12 + m21) / 4;
      const xz = (m13 + m31) / 4;
      const yz = (m23 + m32) / 4;
      if (xx > yy && xx > zz) {
        if (xx < epsilon) {
          x = 0;
          y = 0.707106781;
          z = 0.707106781;
        } else {
          x = Math.sqrt(xx);
          y = xy / x;
          z = xz / x;
        }
      } else if (yy > zz) {
        if (yy < epsilon) {
          x = 0.707106781;
          y = 0;
          z = 0.707106781;
        } else {
          y = Math.sqrt(yy);
          x = xy / y;
          z = yz / y;
        }
      } else {
        if (zz < epsilon) {
          x = 0.707106781;
          y = 0.707106781;
          z = 0;
        } else {
          z = Math.sqrt(zz);
          x = xz / z;
          y = yz / z;
        }
      }
      this.set(x, y, z, angle);
      return this;
    }
    let s = Math.sqrt((m32 - m23) * (m32 - m23) + (m13 - m31) * (m13 - m31) + (m21 - m12) * (m21 - m12));
    if (Math.abs(s) < 1e-3) s = 1;
    this.x = (m32 - m23) / s;
    this.y = (m13 - m31) / s;
    this.z = (m21 - m12) / s;
    this.w = Math.acos((m11 + m22 + m33 - 1) / 2);
    return this;
  }
  setFromMatrixPosition(m) {
    const e = m.elements;
    this.x = e[12];
    this.y = e[13];
    this.z = e[14];
    this.w = e[15];
    return this;
  }
  min(v) {
    this.x = Math.min(this.x, v.x);
    this.y = Math.min(this.y, v.y);
    this.z = Math.min(this.z, v.z);
    this.w = Math.min(this.w, v.w);
    return this;
  }
  max(v) {
    this.x = Math.max(this.x, v.x);
    this.y = Math.max(this.y, v.y);
    this.z = Math.max(this.z, v.z);
    this.w = Math.max(this.w, v.w);
    return this;
  }
  clamp(min, max2) {
    this.x = Math.max(min.x, Math.min(max2.x, this.x));
    this.y = Math.max(min.y, Math.min(max2.y, this.y));
    this.z = Math.max(min.z, Math.min(max2.z, this.z));
    this.w = Math.max(min.w, Math.min(max2.w, this.w));
    return this;
  }
  clampScalar(minVal, maxVal) {
    this.x = Math.max(minVal, Math.min(maxVal, this.x));
    this.y = Math.max(minVal, Math.min(maxVal, this.y));
    this.z = Math.max(minVal, Math.min(maxVal, this.z));
    this.w = Math.max(minVal, Math.min(maxVal, this.w));
    return this;
  }
  clampLength(min, max2) {
    const length = this.length();
    return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max2, length)));
  }
  floor() {
    this.x = Math.floor(this.x);
    this.y = Math.floor(this.y);
    this.z = Math.floor(this.z);
    this.w = Math.floor(this.w);
    return this;
  }
  ceil() {
    this.x = Math.ceil(this.x);
    this.y = Math.ceil(this.y);
    this.z = Math.ceil(this.z);
    this.w = Math.ceil(this.w);
    return this;
  }
  round() {
    this.x = Math.round(this.x);
    this.y = Math.round(this.y);
    this.z = Math.round(this.z);
    this.w = Math.round(this.w);
    return this;
  }
  roundToZero() {
    this.x = Math.trunc(this.x);
    this.y = Math.trunc(this.y);
    this.z = Math.trunc(this.z);
    this.w = Math.trunc(this.w);
    return this;
  }
  negate() {
    this.x = -this.x;
    this.y = -this.y;
    this.z = -this.z;
    this.w = -this.w;
    return this;
  }
  dot(v) {
    return this.x * v.x + this.y * v.y + this.z * v.z + this.w * v.w;
  }
  lengthSq() {
    return this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w;
  }
  length() {
    return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z + this.w * this.w);
  }
  manhattanLength() {
    return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z) + Math.abs(this.w);
  }
  normalize() {
    return this.divideScalar(this.length() || 1);
  }
  setLength(length) {
    return this.normalize().multiplyScalar(length);
  }
  lerp(v, alpha) {
    this.x += (v.x - this.x) * alpha;
    this.y += (v.y - this.y) * alpha;
    this.z += (v.z - this.z) * alpha;
    this.w += (v.w - this.w) * alpha;
    return this;
  }
  lerpVectors(v1, v2, alpha) {
    this.x = v1.x + (v2.x - v1.x) * alpha;
    this.y = v1.y + (v2.y - v1.y) * alpha;
    this.z = v1.z + (v2.z - v1.z) * alpha;
    this.w = v1.w + (v2.w - v1.w) * alpha;
    return this;
  }
  equals(v) {
    return v.x === this.x && v.y === this.y && v.z === this.z && v.w === this.w;
  }
  fromArray(array, offset = 0) {
    this.x = array[offset];
    this.y = array[offset + 1];
    this.z = array[offset + 2];
    this.w = array[offset + 3];
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this.x;
    array[offset + 1] = this.y;
    array[offset + 2] = this.z;
    array[offset + 3] = this.w;
    return array;
  }
  fromBufferAttribute(attribute, index) {
    this.x = attribute.getX(index);
    this.y = attribute.getY(index);
    this.z = attribute.getZ(index);
    this.w = attribute.getW(index);
    return this;
  }
  random() {
    this.x = Math.random();
    this.y = Math.random();
    this.z = Math.random();
    this.w = Math.random();
    return this;
  }
  *[Symbol.iterator]() {
    yield this.x;
    yield this.y;
    yield this.z;
    yield this.w;
  }
}
class RenderTarget extends EventDispatcher {
  static {
    __name(this, "RenderTarget");
  }
  constructor(width = 1, height = 1, options = {}) {
    super();
    this.isRenderTarget = true;
    this.width = width;
    this.height = height;
    this.depth = 1;
    this.scissor = new Vector4(0, 0, width, height);
    this.scissorTest = false;
    this.viewport = new Vector4(0, 0, width, height);
    const image = { width, height, depth: 1 };
    options = Object.assign({
      generateMipmaps: false,
      internalFormat: null,
      minFilter: LinearFilter,
      depthBuffer: true,
      stencilBuffer: false,
      resolveDepthBuffer: true,
      resolveStencilBuffer: true,
      depthTexture: null,
      samples: 0,
      count: 1
    }, options);
    const texture = new Texture(image, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.colorSpace);
    texture.flipY = false;
    texture.generateMipmaps = options.generateMipmaps;
    texture.internalFormat = options.internalFormat;
    this.textures = [];
    const count = options.count;
    for (let i = 0; i < count; i++) {
      this.textures[i] = texture.clone();
      this.textures[i].isRenderTargetTexture = true;
    }
    this.depthBuffer = options.depthBuffer;
    this.stencilBuffer = options.stencilBuffer;
    this.resolveDepthBuffer = options.resolveDepthBuffer;
    this.resolveStencilBuffer = options.resolveStencilBuffer;
    this.depthTexture = options.depthTexture;
    this.samples = options.samples;
  }
  get texture() {
    return this.textures[0];
  }
  set texture(value) {
    this.textures[0] = value;
  }
  setSize(width, height, depth = 1) {
    if (this.width !== width || this.height !== height || this.depth !== depth) {
      this.width = width;
      this.height = height;
      this.depth = depth;
      for (let i = 0, il = this.textures.length; i < il; i++) {
        this.textures[i].image.width = width;
        this.textures[i].image.height = height;
        this.textures[i].image.depth = depth;
      }
      this.dispose();
    }
    this.viewport.set(0, 0, width, height);
    this.scissor.set(0, 0, width, height);
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(source) {
    this.width = source.width;
    this.height = source.height;
    this.depth = source.depth;
    this.scissor.copy(source.scissor);
    this.scissorTest = source.scissorTest;
    this.viewport.copy(source.viewport);
    this.textures.length = 0;
    for (let i = 0, il = source.textures.length; i < il; i++) {
      this.textures[i] = source.textures[i].clone();
      this.textures[i].isRenderTargetTexture = true;
    }
    const image = Object.assign({}, source.texture.image);
    this.texture.source = new Source(image);
    this.depthBuffer = source.depthBuffer;
    this.stencilBuffer = source.stencilBuffer;
    this.resolveDepthBuffer = source.resolveDepthBuffer;
    this.resolveStencilBuffer = source.resolveStencilBuffer;
    if (source.depthTexture !== null) this.depthTexture = source.depthTexture.clone();
    this.samples = source.samples;
    return this;
  }
  dispose() {
    this.dispatchEvent({ type: "dispose" });
  }
}
class WebGLRenderTarget extends RenderTarget {
  static {
    __name(this, "WebGLRenderTarget");
  }
  constructor(width = 1, height = 1, options = {}) {
    super(width, height, options);
    this.isWebGLRenderTarget = true;
  }
}
class DataArrayTexture extends Texture {
  static {
    __name(this, "DataArrayTexture");
  }
  constructor(data = null, width = 1, height = 1, depth = 1) {
    super(null);
    this.isDataArrayTexture = true;
    this.image = { data, width, height, depth };
    this.magFilter = NearestFilter;
    this.minFilter = NearestFilter;
    this.wrapR = ClampToEdgeWrapping;
    this.generateMipmaps = false;
    this.flipY = false;
    this.unpackAlignment = 1;
    this.layerUpdates = /* @__PURE__ */ new Set();
  }
  addLayerUpdate(layerIndex) {
    this.layerUpdates.add(layerIndex);
  }
  clearLayerUpdates() {
    this.layerUpdates.clear();
  }
}
class WebGLArrayRenderTarget extends WebGLRenderTarget {
  static {
    __name(this, "WebGLArrayRenderTarget");
  }
  constructor(width = 1, height = 1, depth = 1, options = {}) {
    super(width, height, options);
    this.isWebGLArrayRenderTarget = true;
    this.depth = depth;
    this.texture = new DataArrayTexture(null, width, height, depth);
    this.texture.isRenderTargetTexture = true;
  }
}
class Data3DTexture extends Texture {
  static {
    __name(this, "Data3DTexture");
  }
  constructor(data = null, width = 1, height = 1, depth = 1) {
    super(null);
    this.isData3DTexture = true;
    this.image = { data, width, height, depth };
    this.magFilter = NearestFilter;
    this.minFilter = NearestFilter;
    this.wrapR = ClampToEdgeWrapping;
    this.generateMipmaps = false;
    this.flipY = false;
    this.unpackAlignment = 1;
  }
}
class Quaternion {
  static {
    __name(this, "Quaternion");
  }
  constructor(x = 0, y = 0, z = 0, w = 1) {
    this.isQuaternion = true;
    this._x = x;
    this._y = y;
    this._z = z;
    this._w = w;
  }
  static slerpFlat(dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t) {
    let x0 = src0[srcOffset0 + 0], y0 = src0[srcOffset0 + 1], z0 = src0[srcOffset0 + 2], w0 = src0[srcOffset0 + 3];
    const x1 = src1[srcOffset1 + 0], y1 = src1[srcOffset1 + 1], z1 = src1[srcOffset1 + 2], w1 = src1[srcOffset1 + 3];
    if (t === 0) {
      dst[dstOffset + 0] = x0;
      dst[dstOffset + 1] = y0;
      dst[dstOffset + 2] = z0;
      dst[dstOffset + 3] = w0;
      return;
    }
    if (t === 1) {
      dst[dstOffset + 0] = x1;
      dst[dstOffset + 1] = y1;
      dst[dstOffset + 2] = z1;
      dst[dstOffset + 3] = w1;
      return;
    }
    if (w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1) {
      let s = 1 - t;
      const cos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1, dir = cos >= 0 ? 1 : -1, sqrSin = 1 - cos * cos;
      if (sqrSin > Number.EPSILON) {
        const sin = Math.sqrt(sqrSin), len = Math.atan2(sin, cos * dir);
        s = Math.sin(s * len) / sin;
        t = Math.sin(t * len) / sin;
      }
      const tDir = t * dir;
      x0 = x0 * s + x1 * tDir;
      y0 = y0 * s + y1 * tDir;
      z0 = z0 * s + z1 * tDir;
      w0 = w0 * s + w1 * tDir;
      if (s === 1 - t) {
        const f = 1 / Math.sqrt(x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0);
        x0 *= f;
        y0 *= f;
        z0 *= f;
        w0 *= f;
      }
    }
    dst[dstOffset] = x0;
    dst[dstOffset + 1] = y0;
    dst[dstOffset + 2] = z0;
    dst[dstOffset + 3] = w0;
  }
  static multiplyQuaternionsFlat(dst, dstOffset, src0, srcOffset0, src1, srcOffset1) {
    const x0 = src0[srcOffset0];
    const y0 = src0[srcOffset0 + 1];
    const z0 = src0[srcOffset0 + 2];
    const w0 = src0[srcOffset0 + 3];
    const x1 = src1[srcOffset1];
    const y1 = src1[srcOffset1 + 1];
    const z1 = src1[srcOffset1 + 2];
    const w1 = src1[srcOffset1 + 3];
    dst[dstOffset] = x0 * w1 + w0 * x1 + y0 * z1 - z0 * y1;
    dst[dstOffset + 1] = y0 * w1 + w0 * y1 + z0 * x1 - x0 * z1;
    dst[dstOffset + 2] = z0 * w1 + w0 * z1 + x0 * y1 - y0 * x1;
    dst[dstOffset + 3] = w0 * w1 - x0 * x1 - y0 * y1 - z0 * z1;
    return dst;
  }
  get x() {
    return this._x;
  }
  set x(value) {
    this._x = value;
    this._onChangeCallback();
  }
  get y() {
    return this._y;
  }
  set y(value) {
    this._y = value;
    this._onChangeCallback();
  }
  get z() {
    return this._z;
  }
  set z(value) {
    this._z = value;
    this._onChangeCallback();
  }
  get w() {
    return this._w;
  }
  set w(value) {
    this._w = value;
    this._onChangeCallback();
  }
  set(x, y, z, w) {
    this._x = x;
    this._y = y;
    this._z = z;
    this._w = w;
    this._onChangeCallback();
    return this;
  }
  clone() {
    return new this.constructor(this._x, this._y, this._z, this._w);
  }
  copy(quaternion) {
    this._x = quaternion.x;
    this._y = quaternion.y;
    this._z = quaternion.z;
    this._w = quaternion.w;
    this._onChangeCallback();
    return this;
  }
  setFromEuler(euler, update = true) {
    const x = euler._x, y = euler._y, z = euler._z, order = euler._order;
    const cos = Math.cos;
    const sin = Math.sin;
    const c1 = cos(x / 2);
    const c2 = cos(y / 2);
    const c3 = cos(z / 2);
    const s1 = sin(x / 2);
    const s2 = sin(y / 2);
    const s3 = sin(z / 2);
    switch (order) {
      case "XYZ":
        this._x = s1 * c2 * c3 + c1 * s2 * s3;
        this._y = c1 * s2 * c3 - s1 * c2 * s3;
        this._z = c1 * c2 * s3 + s1 * s2 * c3;
        this._w = c1 * c2 * c3 - s1 * s2 * s3;
        break;
      case "YXZ":
        this._x = s1 * c2 * c3 + c1 * s2 * s3;
        this._y = c1 * s2 * c3 - s1 * c2 * s3;
        this._z = c1 * c2 * s3 - s1 * s2 * c3;
        this._w = c1 * c2 * c3 + s1 * s2 * s3;
        break;
      case "ZXY":
        this._x = s1 * c2 * c3 - c1 * s2 * s3;
        this._y = c1 * s2 * c3 + s1 * c2 * s3;
        this._z = c1 * c2 * s3 + s1 * s2 * c3;
        this._w = c1 * c2 * c3 - s1 * s2 * s3;
        break;
      case "ZYX":
        this._x = s1 * c2 * c3 - c1 * s2 * s3;
        this._y = c1 * s2 * c3 + s1 * c2 * s3;
        this._z = c1 * c2 * s3 - s1 * s2 * c3;
        this._w = c1 * c2 * c3 + s1 * s2 * s3;
        break;
      case "YZX":
        this._x = s1 * c2 * c3 + c1 * s2 * s3;
        this._y = c1 * s2 * c3 + s1 * c2 * s3;
        this._z = c1 * c2 * s3 - s1 * s2 * c3;
        this._w = c1 * c2 * c3 - s1 * s2 * s3;
        break;
      case "XZY":
        this._x = s1 * c2 * c3 - c1 * s2 * s3;
        this._y = c1 * s2 * c3 - s1 * c2 * s3;
        this._z = c1 * c2 * s3 + s1 * s2 * c3;
        this._w = c1 * c2 * c3 + s1 * s2 * s3;
        break;
      default:
        console.warn("THREE.Quaternion: .setFromEuler() encountered an unknown order: " + order);
    }
    if (update === true) this._onChangeCallback();
    return this;
  }
  setFromAxisAngle(axis, angle) {
    const halfAngle = angle / 2, s = Math.sin(halfAngle);
    this._x = axis.x * s;
    this._y = axis.y * s;
    this._z = axis.z * s;
    this._w = Math.cos(halfAngle);
    this._onChangeCallback();
    return this;
  }
  setFromRotationMatrix(m) {
    const te = m.elements, m11 = te[0], m12 = te[4], m13 = te[8], m21 = te[1], m22 = te[5], m23 = te[9], m31 = te[2], m32 = te[6], m33 = te[10], trace = m11 + m22 + m33;
    if (trace > 0) {
      const s = 0.5 / Math.sqrt(trace + 1);
      this._w = 0.25 / s;
      this._x = (m32 - m23) * s;
      this._y = (m13 - m31) * s;
      this._z = (m21 - m12) * s;
    } else if (m11 > m22 && m11 > m33) {
      const s = 2 * Math.sqrt(1 + m11 - m22 - m33);
      this._w = (m32 - m23) / s;
      this._x = 0.25 * s;
      this._y = (m12 + m21) / s;
      this._z = (m13 + m31) / s;
    } else if (m22 > m33) {
      const s = 2 * Math.sqrt(1 + m22 - m11 - m33);
      this._w = (m13 - m31) / s;
      this._x = (m12 + m21) / s;
      this._y = 0.25 * s;
      this._z = (m23 + m32) / s;
    } else {
      const s = 2 * Math.sqrt(1 + m33 - m11 - m22);
      this._w = (m21 - m12) / s;
      this._x = (m13 + m31) / s;
      this._y = (m23 + m32) / s;
      this._z = 0.25 * s;
    }
    this._onChangeCallback();
    return this;
  }
  setFromUnitVectors(vFrom, vTo) {
    let r = vFrom.dot(vTo) + 1;
    if (r < Number.EPSILON) {
      r = 0;
      if (Math.abs(vFrom.x) > Math.abs(vFrom.z)) {
        this._x = -vFrom.y;
        this._y = vFrom.x;
        this._z = 0;
        this._w = r;
      } else {
        this._x = 0;
        this._y = -vFrom.z;
        this._z = vFrom.y;
        this._w = r;
      }
    } else {
      this._x = vFrom.y * vTo.z - vFrom.z * vTo.y;
      this._y = vFrom.z * vTo.x - vFrom.x * vTo.z;
      this._z = vFrom.x * vTo.y - vFrom.y * vTo.x;
      this._w = r;
    }
    return this.normalize();
  }
  angleTo(q) {
    return 2 * Math.acos(Math.abs(clamp(this.dot(q), -1, 1)));
  }
  rotateTowards(q, step) {
    const angle = this.angleTo(q);
    if (angle === 0) return this;
    const t = Math.min(1, step / angle);
    this.slerp(q, t);
    return this;
  }
  identity() {
    return this.set(0, 0, 0, 1);
  }
  invert() {
    return this.conjugate();
  }
  conjugate() {
    this._x *= -1;
    this._y *= -1;
    this._z *= -1;
    this._onChangeCallback();
    return this;
  }
  dot(v) {
    return this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;
  }
  lengthSq() {
    return this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;
  }
  length() {
    return Math.sqrt(this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w);
  }
  normalize() {
    let l = this.length();
    if (l === 0) {
      this._x = 0;
      this._y = 0;
      this._z = 0;
      this._w = 1;
    } else {
      l = 1 / l;
      this._x = this._x * l;
      this._y = this._y * l;
      this._z = this._z * l;
      this._w = this._w * l;
    }
    this._onChangeCallback();
    return this;
  }
  multiply(q) {
    return this.multiplyQuaternions(this, q);
  }
  premultiply(q) {
    return this.multiplyQuaternions(q, this);
  }
  multiplyQuaternions(a, b) {
    const qax = a._x, qay = a._y, qaz = a._z, qaw = a._w;
    const qbx = b._x, qby = b._y, qbz = b._z, qbw = b._w;
    this._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;
    this._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;
    this._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;
    this._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;
    this._onChangeCallback();
    return this;
  }
  slerp(qb, t) {
    if (t === 0) return this;
    if (t === 1) return this.copy(qb);
    const x = this._x, y = this._y, z = this._z, w = this._w;
    let cosHalfTheta = w * qb._w + x * qb._x + y * qb._y + z * qb._z;
    if (cosHalfTheta < 0) {
      this._w = -qb._w;
      this._x = -qb._x;
      this._y = -qb._y;
      this._z = -qb._z;
      cosHalfTheta = -cosHalfTheta;
    } else {
      this.copy(qb);
    }
    if (cosHalfTheta >= 1) {
      this._w = w;
      this._x = x;
      this._y = y;
      this._z = z;
      return this;
    }
    const sqrSinHalfTheta = 1 - cosHalfTheta * cosHalfTheta;
    if (sqrSinHalfTheta <= Number.EPSILON) {
      const s = 1 - t;
      this._w = s * w + t * this._w;
      this._x = s * x + t * this._x;
      this._y = s * y + t * this._y;
      this._z = s * z + t * this._z;
      this.normalize();
      return this;
    }
    const sinHalfTheta = Math.sqrt(sqrSinHalfTheta);
    const halfTheta = Math.atan2(sinHalfTheta, cosHalfTheta);
    const ratioA = Math.sin((1 - t) * halfTheta) / sinHalfTheta, ratioB = Math.sin(t * halfTheta) / sinHalfTheta;
    this._w = w * ratioA + this._w * ratioB;
    this._x = x * ratioA + this._x * ratioB;
    this._y = y * ratioA + this._y * ratioB;
    this._z = z * ratioA + this._z * ratioB;
    this._onChangeCallback();
    return this;
  }
  slerpQuaternions(qa, qb, t) {
    return this.copy(qa).slerp(qb, t);
  }
  random() {
    const theta1 = 2 * Math.PI * Math.random();
    const theta2 = 2 * Math.PI * Math.random();
    const x0 = Math.random();
    const r1 = Math.sqrt(1 - x0);
    const r2 = Math.sqrt(x0);
    return this.set(
      r1 * Math.sin(theta1),
      r1 * Math.cos(theta1),
      r2 * Math.sin(theta2),
      r2 * Math.cos(theta2)
    );
  }
  equals(quaternion) {
    return quaternion._x === this._x && quaternion._y === this._y && quaternion._z === this._z && quaternion._w === this._w;
  }
  fromArray(array, offset = 0) {
    this._x = array[offset];
    this._y = array[offset + 1];
    this._z = array[offset + 2];
    this._w = array[offset + 3];
    this._onChangeCallback();
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this._x;
    array[offset + 1] = this._y;
    array[offset + 2] = this._z;
    array[offset + 3] = this._w;
    return array;
  }
  fromBufferAttribute(attribute, index) {
    this._x = attribute.getX(index);
    this._y = attribute.getY(index);
    this._z = attribute.getZ(index);
    this._w = attribute.getW(index);
    this._onChangeCallback();
    return this;
  }
  toJSON() {
    return this.toArray();
  }
  _onChange(callback) {
    this._onChangeCallback = callback;
    return this;
  }
  _onChangeCallback() {
  }
  *[Symbol.iterator]() {
    yield this._x;
    yield this._y;
    yield this._z;
    yield this._w;
  }
}
class Vector3 {
  static {
    __name(this, "Vector3");
  }
  constructor(x = 0, y = 0, z = 0) {
    Vector3.prototype.isVector3 = true;
    this.x = x;
    this.y = y;
    this.z = z;
  }
  set(x, y, z) {
    if (z === void 0) z = this.z;
    this.x = x;
    this.y = y;
    this.z = z;
    return this;
  }
  setScalar(scalar) {
    this.x = scalar;
    this.y = scalar;
    this.z = scalar;
    return this;
  }
  setX(x) {
    this.x = x;
    return this;
  }
  setY(y) {
    this.y = y;
    return this;
  }
  setZ(z) {
    this.z = z;
    return this;
  }
  setComponent(index, value) {
    switch (index) {
      case 0:
        this.x = value;
        break;
      case 1:
        this.y = value;
        break;
      case 2:
        this.z = value;
        break;
      default:
        throw new Error("index is out of range: " + index);
    }
    return this;
  }
  getComponent(index) {
    switch (index) {
      case 0:
        return this.x;
      case 1:
        return this.y;
      case 2:
        return this.z;
      default:
        throw new Error("index is out of range: " + index);
    }
  }
  clone() {
    return new this.constructor(this.x, this.y, this.z);
  }
  copy(v) {
    this.x = v.x;
    this.y = v.y;
    this.z = v.z;
    return this;
  }
  add(v) {
    this.x += v.x;
    this.y += v.y;
    this.z += v.z;
    return this;
  }
  addScalar(s) {
    this.x += s;
    this.y += s;
    this.z += s;
    return this;
  }
  addVectors(a, b) {
    this.x = a.x + b.x;
    this.y = a.y + b.y;
    this.z = a.z + b.z;
    return this;
  }
  addScaledVector(v, s) {
    this.x += v.x * s;
    this.y += v.y * s;
    this.z += v.z * s;
    return this;
  }
  sub(v) {
    this.x -= v.x;
    this.y -= v.y;
    this.z -= v.z;
    return this;
  }
  subScalar(s) {
    this.x -= s;
    this.y -= s;
    this.z -= s;
    return this;
  }
  subVectors(a, b) {
    this.x = a.x - b.x;
    this.y = a.y - b.y;
    this.z = a.z - b.z;
    return this;
  }
  multiply(v) {
    this.x *= v.x;
    this.y *= v.y;
    this.z *= v.z;
    return this;
  }
  multiplyScalar(scalar) {
    this.x *= scalar;
    this.y *= scalar;
    this.z *= scalar;
    return this;
  }
  multiplyVectors(a, b) {
    this.x = a.x * b.x;
    this.y = a.y * b.y;
    this.z = a.z * b.z;
    return this;
  }
  applyEuler(euler) {
    return this.applyQuaternion(_quaternion$4.setFromEuler(euler));
  }
  applyAxisAngle(axis, angle) {
    return this.applyQuaternion(_quaternion$4.setFromAxisAngle(axis, angle));
  }
  applyMatrix3(m) {
    const x = this.x, y = this.y, z = this.z;
    const e = m.elements;
    this.x = e[0] * x + e[3] * y + e[6] * z;
    this.y = e[1] * x + e[4] * y + e[7] * z;
    this.z = e[2] * x + e[5] * y + e[8] * z;
    return this;
  }
  applyNormalMatrix(m) {
    return this.applyMatrix3(m).normalize();
  }
  applyMatrix4(m) {
    const x = this.x, y = this.y, z = this.z;
    const e = m.elements;
    const w = 1 / (e[3] * x + e[7] * y + e[11] * z + e[15]);
    this.x = (e[0] * x + e[4] * y + e[8] * z + e[12]) * w;
    this.y = (e[1] * x + e[5] * y + e[9] * z + e[13]) * w;
    this.z = (e[2] * x + e[6] * y + e[10] * z + e[14]) * w;
    return this;
  }
  applyQuaternion(q) {
    const vx = this.x, vy = this.y, vz = this.z;
    const qx = q.x, qy = q.y, qz = q.z, qw = q.w;
    const tx = 2 * (qy * vz - qz * vy);
    const ty = 2 * (qz * vx - qx * vz);
    const tz = 2 * (qx * vy - qy * vx);
    this.x = vx + qw * tx + qy * tz - qz * ty;
    this.y = vy + qw * ty + qz * tx - qx * tz;
    this.z = vz + qw * tz + qx * ty - qy * tx;
    return this;
  }
  project(camera) {
    return this.applyMatrix4(camera.matrixWorldInverse).applyMatrix4(camera.projectionMatrix);
  }
  unproject(camera) {
    return this.applyMatrix4(camera.projectionMatrixInverse).applyMatrix4(camera.matrixWorld);
  }
  transformDirection(m) {
    const x = this.x, y = this.y, z = this.z;
    const e = m.elements;
    this.x = e[0] * x + e[4] * y + e[8] * z;
    this.y = e[1] * x + e[5] * y + e[9] * z;
    this.z = e[2] * x + e[6] * y + e[10] * z;
    return this.normalize();
  }
  divide(v) {
    this.x /= v.x;
    this.y /= v.y;
    this.z /= v.z;
    return this;
  }
  divideScalar(scalar) {
    return this.multiplyScalar(1 / scalar);
  }
  min(v) {
    this.x = Math.min(this.x, v.x);
    this.y = Math.min(this.y, v.y);
    this.z = Math.min(this.z, v.z);
    return this;
  }
  max(v) {
    this.x = Math.max(this.x, v.x);
    this.y = Math.max(this.y, v.y);
    this.z = Math.max(this.z, v.z);
    return this;
  }
  clamp(min, max2) {
    this.x = Math.max(min.x, Math.min(max2.x, this.x));
    this.y = Math.max(min.y, Math.min(max2.y, this.y));
    this.z = Math.max(min.z, Math.min(max2.z, this.z));
    return this;
  }
  clampScalar(minVal, maxVal) {
    this.x = Math.max(minVal, Math.min(maxVal, this.x));
    this.y = Math.max(minVal, Math.min(maxVal, this.y));
    this.z = Math.max(minVal, Math.min(maxVal, this.z));
    return this;
  }
  clampLength(min, max2) {
    const length = this.length();
    return this.divideScalar(length || 1).multiplyScalar(Math.max(min, Math.min(max2, length)));
  }
  floor() {
    this.x = Math.floor(this.x);
    this.y = Math.floor(this.y);
    this.z = Math.floor(this.z);
    return this;
  }
  ceil() {
    this.x = Math.ceil(this.x);
    this.y = Math.ceil(this.y);
    this.z = Math.ceil(this.z);
    return this;
  }
  round() {
    this.x = Math.round(this.x);
    this.y = Math.round(this.y);
    this.z = Math.round(this.z);
    return this;
  }
  roundToZero() {
    this.x = Math.trunc(this.x);
    this.y = Math.trunc(this.y);
    this.z = Math.trunc(this.z);
    return this;
  }
  negate() {
    this.x = -this.x;
    this.y = -this.y;
    this.z = -this.z;
    return this;
  }
  dot(v) {
    return this.x * v.x + this.y * v.y + this.z * v.z;
  }
  // TODO lengthSquared?
  lengthSq() {
    return this.x * this.x + this.y * this.y + this.z * this.z;
  }
  length() {
    return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);
  }
  manhattanLength() {
    return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z);
  }
  normalize() {
    return this.divideScalar(this.length() || 1);
  }
  setLength(length) {
    return this.normalize().multiplyScalar(length);
  }
  lerp(v, alpha) {
    this.x += (v.x - this.x) * alpha;
    this.y += (v.y - this.y) * alpha;
    this.z += (v.z - this.z) * alpha;
    return this;
  }
  lerpVectors(v1, v2, alpha) {
    this.x = v1.x + (v2.x - v1.x) * alpha;
    this.y = v1.y + (v2.y - v1.y) * alpha;
    this.z = v1.z + (v2.z - v1.z) * alpha;
    return this;
  }
  cross(v) {
    return this.crossVectors(this, v);
  }
  crossVectors(a, b) {
    const ax = a.x, ay = a.y, az = a.z;
    const bx = b.x, by = b.y, bz = b.z;
    this.x = ay * bz - az * by;
    this.y = az * bx - ax * bz;
    this.z = ax * by - ay * bx;
    return this;
  }
  projectOnVector(v) {
    const denominator = v.lengthSq();
    if (denominator === 0) return this.set(0, 0, 0);
    const scalar = v.dot(this) / denominator;
    return this.copy(v).multiplyScalar(scalar);
  }
  projectOnPlane(planeNormal) {
    _vector$c.copy(this).projectOnVector(planeNormal);
    return this.sub(_vector$c);
  }
  reflect(normal) {
    return this.sub(_vector$c.copy(normal).multiplyScalar(2 * this.dot(normal)));
  }
  angleTo(v) {
    const denominator = Math.sqrt(this.lengthSq() * v.lengthSq());
    if (denominator === 0) return Math.PI / 2;
    const theta = this.dot(v) / denominator;
    return Math.acos(clamp(theta, -1, 1));
  }
  distanceTo(v) {
    return Math.sqrt(this.distanceToSquared(v));
  }
  distanceToSquared(v) {
    const dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;
    return dx * dx + dy * dy + dz * dz;
  }
  manhattanDistanceTo(v) {
    return Math.abs(this.x - v.x) + Math.abs(this.y - v.y) + Math.abs(this.z - v.z);
  }
  setFromSpherical(s) {
    return this.setFromSphericalCoords(s.radius, s.phi, s.theta);
  }
  setFromSphericalCoords(radius, phi, theta) {
    const sinPhiRadius = Math.sin(phi) * radius;
    this.x = sinPhiRadius * Math.sin(theta);
    this.y = Math.cos(phi) * radius;
    this.z = sinPhiRadius * Math.cos(theta);
    return this;
  }
  setFromCylindrical(c) {
    return this.setFromCylindricalCoords(c.radius, c.theta, c.y);
  }
  setFromCylindricalCoords(radius, theta, y) {
    this.x = radius * Math.sin(theta);
    this.y = y;
    this.z = radius * Math.cos(theta);
    return this;
  }
  setFromMatrixPosition(m) {
    const e = m.elements;
    this.x = e[12];
    this.y = e[13];
    this.z = e[14];
    return this;
  }
  setFromMatrixScale(m) {
    const sx = this.setFromMatrixColumn(m, 0).length();
    const sy = this.setFromMatrixColumn(m, 1).length();
    const sz = this.setFromMatrixColumn(m, 2).length();
    this.x = sx;
    this.y = sy;
    this.z = sz;
    return this;
  }
  setFromMatrixColumn(m, index) {
    return this.fromArray(m.elements, index * 4);
  }
  setFromMatrix3Column(m, index) {
    return this.fromArray(m.elements, index * 3);
  }
  setFromEuler(e) {
    this.x = e._x;
    this.y = e._y;
    this.z = e._z;
    return this;
  }
  setFromColor(c) {
    this.x = c.r;
    this.y = c.g;
    this.z = c.b;
    return this;
  }
  equals(v) {
    return v.x === this.x && v.y === this.y && v.z === this.z;
  }
  fromArray(array, offset = 0) {
    this.x = array[offset];
    this.y = array[offset + 1];
    this.z = array[offset + 2];
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this.x;
    array[offset + 1] = this.y;
    array[offset + 2] = this.z;
    return array;
  }
  fromBufferAttribute(attribute, index) {
    this.x = attribute.getX(index);
    this.y = attribute.getY(index);
    this.z = attribute.getZ(index);
    return this;
  }
  random() {
    this.x = Math.random();
    this.y = Math.random();
    this.z = Math.random();
    return this;
  }
  randomDirection() {
    const theta = Math.random() * Math.PI * 2;
    const u = Math.random() * 2 - 1;
    const c = Math.sqrt(1 - u * u);
    this.x = c * Math.cos(theta);
    this.y = u;
    this.z = c * Math.sin(theta);
    return this;
  }
  *[Symbol.iterator]() {
    yield this.x;
    yield this.y;
    yield this.z;
  }
}
const _vector$c = /* @__PURE__ */ new Vector3();
const _quaternion$4 = /* @__PURE__ */ new Quaternion();
class Box3 {
  static {
    __name(this, "Box3");
  }
  constructor(min = new Vector3(Infinity, Infinity, Infinity), max2 = new Vector3(-Infinity, -Infinity, -Infinity)) {
    this.isBox3 = true;
    this.min = min;
    this.max = max2;
  }
  set(min, max2) {
    this.min.copy(min);
    this.max.copy(max2);
    return this;
  }
  setFromArray(array) {
    this.makeEmpty();
    for (let i = 0, il = array.length; i < il; i += 3) {
      this.expandByPoint(_vector$b.fromArray(array, i));
    }
    return this;
  }
  setFromBufferAttribute(attribute) {
    this.makeEmpty();
    for (let i = 0, il = attribute.count; i < il; i++) {
      this.expandByPoint(_vector$b.fromBufferAttribute(attribute, i));
    }
    return this;
  }
  setFromPoints(points) {
    this.makeEmpty();
    for (let i = 0, il = points.length; i < il; i++) {
      this.expandByPoint(points[i]);
    }
    return this;
  }
  setFromCenterAndSize(center, size) {
    const halfSize = _vector$b.copy(size).multiplyScalar(0.5);
    this.min.copy(center).sub(halfSize);
    this.max.copy(center).add(halfSize);
    return this;
  }
  setFromObject(object, precise = false) {
    this.makeEmpty();
    return this.expandByObject(object, precise);
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(box) {
    this.min.copy(box.min);
    this.max.copy(box.max);
    return this;
  }
  makeEmpty() {
    this.min.x = this.min.y = this.min.z = Infinity;
    this.max.x = this.max.y = this.max.z = -Infinity;
    return this;
  }
  isEmpty() {
    return this.max.x < this.min.x || this.max.y < this.min.y || this.max.z < this.min.z;
  }
  getCenter(target) {
    return this.isEmpty() ? target.set(0, 0, 0) : target.addVectors(this.min, this.max).multiplyScalar(0.5);
  }
  getSize(target) {
    return this.isEmpty() ? target.set(0, 0, 0) : target.subVectors(this.max, this.min);
  }
  expandByPoint(point) {
    this.min.min(point);
    this.max.max(point);
    return this;
  }
  expandByVector(vector) {
    this.min.sub(vector);
    this.max.add(vector);
    return this;
  }
  expandByScalar(scalar) {
    this.min.addScalar(-scalar);
    this.max.addScalar(scalar);
    return this;
  }
  expandByObject(object, precise = false) {
    object.updateWorldMatrix(false, false);
    const geometry = object.geometry;
    if (geometry !== void 0) {
      const positionAttribute = geometry.getAttribute("position");
      if (precise === true && positionAttribute !== void 0 && object.isInstancedMesh !== true) {
        for (let i = 0, l = positionAttribute.count; i < l; i++) {
          if (object.isMesh === true) {
            object.getVertexPosition(i, _vector$b);
          } else {
            _vector$b.fromBufferAttribute(positionAttribute, i);
          }
          _vector$b.applyMatrix4(object.matrixWorld);
          this.expandByPoint(_vector$b);
        }
      } else {
        if (object.boundingBox !== void 0) {
          if (object.boundingBox === null) {
            object.computeBoundingBox();
          }
          _box$4.copy(object.boundingBox);
        } else {
          if (geometry.boundingBox === null) {
            geometry.computeBoundingBox();
          }
          _box$4.copy(geometry.boundingBox);
        }
        _box$4.applyMatrix4(object.matrixWorld);
        this.union(_box$4);
      }
    }
    const children = object.children;
    for (let i = 0, l = children.length; i < l; i++) {
      this.expandByObject(children[i], precise);
    }
    return this;
  }
  containsPoint(point) {
    return point.x >= this.min.x && point.x <= this.max.x && point.y >= this.min.y && point.y <= this.max.y && point.z >= this.min.z && point.z <= this.max.z;
  }
  containsBox(box) {
    return this.min.x <= box.min.x && box.max.x <= this.max.x && this.min.y <= box.min.y && box.max.y <= this.max.y && this.min.z <= box.min.z && box.max.z <= this.max.z;
  }
  getParameter(point, target) {
    return target.set(
      (point.x - this.min.x) / (this.max.x - this.min.x),
      (point.y - this.min.y) / (this.max.y - this.min.y),
      (point.z - this.min.z) / (this.max.z - this.min.z)
    );
  }
  intersectsBox(box) {
    return box.max.x >= this.min.x && box.min.x <= this.max.x && box.max.y >= this.min.y && box.min.y <= this.max.y && box.max.z >= this.min.z && box.min.z <= this.max.z;
  }
  intersectsSphere(sphere) {
    this.clampPoint(sphere.center, _vector$b);
    return _vector$b.distanceToSquared(sphere.center) <= sphere.radius * sphere.radius;
  }
  intersectsPlane(plane) {
    let min, max2;
    if (plane.normal.x > 0) {
      min = plane.normal.x * this.min.x;
      max2 = plane.normal.x * this.max.x;
    } else {
      min = plane.normal.x * this.max.x;
      max2 = plane.normal.x * this.min.x;
    }
    if (plane.normal.y > 0) {
      min += plane.normal.y * this.min.y;
      max2 += plane.normal.y * this.max.y;
    } else {
      min += plane.normal.y * this.max.y;
      max2 += plane.normal.y * this.min.y;
    }
    if (plane.normal.z > 0) {
      min += plane.normal.z * this.min.z;
      max2 += plane.normal.z * this.max.z;
    } else {
      min += plane.normal.z * this.max.z;
      max2 += plane.normal.z * this.min.z;
    }
    return min <= -plane.constant && max2 >= -plane.constant;
  }
  intersectsTriangle(triangle) {
    if (this.isEmpty()) {
      return false;
    }
    this.getCenter(_center);
    _extents.subVectors(this.max, _center);
    _v0$3.subVectors(triangle.a, _center);
    _v1$7.subVectors(triangle.b, _center);
    _v2$4.subVectors(triangle.c, _center);
    _f0.subVectors(_v1$7, _v0$3);
    _f1.subVectors(_v2$4, _v1$7);
    _f2.subVectors(_v0$3, _v2$4);
    let axes = [
      0,
      -_f0.z,
      _f0.y,
      0,
      -_f1.z,
      _f1.y,
      0,
      -_f2.z,
      _f2.y,
      _f0.z,
      0,
      -_f0.x,
      _f1.z,
      0,
      -_f1.x,
      _f2.z,
      0,
      -_f2.x,
      -_f0.y,
      _f0.x,
      0,
      -_f1.y,
      _f1.x,
      0,
      -_f2.y,
      _f2.x,
      0
    ];
    if (!satForAxes(axes, _v0$3, _v1$7, _v2$4, _extents)) {
      return false;
    }
    axes = [1, 0, 0, 0, 1, 0, 0, 0, 1];
    if (!satForAxes(axes, _v0$3, _v1$7, _v2$4, _extents)) {
      return false;
    }
    _triangleNormal.crossVectors(_f0, _f1);
    axes = [_triangleNormal.x, _triangleNormal.y, _triangleNormal.z];
    return satForAxes(axes, _v0$3, _v1$7, _v2$4, _extents);
  }
  clampPoint(point, target) {
    return target.copy(point).clamp(this.min, this.max);
  }
  distanceToPoint(point) {
    return this.clampPoint(point, _vector$b).distanceTo(point);
  }
  getBoundingSphere(target) {
    if (this.isEmpty()) {
      target.makeEmpty();
    } else {
      this.getCenter(target.center);
      target.radius = this.getSize(_vector$b).length() * 0.5;
    }
    return target;
  }
  intersect(box) {
    this.min.max(box.min);
    this.max.min(box.max);
    if (this.isEmpty()) this.makeEmpty();
    return this;
  }
  union(box) {
    this.min.min(box.min);
    this.max.max(box.max);
    return this;
  }
  applyMatrix4(matrix) {
    if (this.isEmpty()) return this;
    _points[0].set(this.min.x, this.min.y, this.min.z).applyMatrix4(matrix);
    _points[1].set(this.min.x, this.min.y, this.max.z).applyMatrix4(matrix);
    _points[2].set(this.min.x, this.max.y, this.min.z).applyMatrix4(matrix);
    _points[3].set(this.min.x, this.max.y, this.max.z).applyMatrix4(matrix);
    _points[4].set(this.max.x, this.min.y, this.min.z).applyMatrix4(matrix);
    _points[5].set(this.max.x, this.min.y, this.max.z).applyMatrix4(matrix);
    _points[6].set(this.max.x, this.max.y, this.min.z).applyMatrix4(matrix);
    _points[7].set(this.max.x, this.max.y, this.max.z).applyMatrix4(matrix);
    this.setFromPoints(_points);
    return this;
  }
  translate(offset) {
    this.min.add(offset);
    this.max.add(offset);
    return this;
  }
  equals(box) {
    return box.min.equals(this.min) && box.max.equals(this.max);
  }
}
const _points = [
  /* @__PURE__ */ new Vector3(),
  /* @__PURE__ */ new Vector3(),
  /* @__PURE__ */ new Vector3(),
  /* @__PURE__ */ new Vector3(),
  /* @__PURE__ */ new Vector3(),
  /* @__PURE__ */ new Vector3(),
  /* @__PURE__ */ new Vector3(),
  /* @__PURE__ */ new Vector3()
];
const _vector$b = /* @__PURE__ */ new Vector3();
const _box$4 = /* @__PURE__ */ new Box3();
const _v0$3 = /* @__PURE__ */ new Vector3();
const _v1$7 = /* @__PURE__ */ new Vector3();
const _v2$4 = /* @__PURE__ */ new Vector3();
const _f0 = /* @__PURE__ */ new Vector3();
const _f1 = /* @__PURE__ */ new Vector3();
const _f2 = /* @__PURE__ */ new Vector3();
const _center = /* @__PURE__ */ new Vector3();
const _extents = /* @__PURE__ */ new Vector3();
const _triangleNormal = /* @__PURE__ */ new Vector3();
const _testAxis = /* @__PURE__ */ new Vector3();
function satForAxes(axes, v0, v1, v2, extents) {
  for (let i = 0, j = axes.length - 3; i <= j; i += 3) {
    _testAxis.fromArray(axes, i);
    const r = extents.x * Math.abs(_testAxis.x) + extents.y * Math.abs(_testAxis.y) + extents.z * Math.abs(_testAxis.z);
    const p0 = v0.dot(_testAxis);
    const p1 = v1.dot(_testAxis);
    const p2 = v2.dot(_testAxis);
    if (Math.max(-Math.max(p0, p1, p2), Math.min(p0, p1, p2)) > r) {
      return false;
    }
  }
  return true;
}
__name(satForAxes, "satForAxes");
const _box$3 = /* @__PURE__ */ new Box3();
const _v1$6 = /* @__PURE__ */ new Vector3();
const _v2$3 = /* @__PURE__ */ new Vector3();
class Sphere {
  static {
    __name(this, "Sphere");
  }
  constructor(center = new Vector3(), radius = -1) {
    this.isSphere = true;
    this.center = center;
    this.radius = radius;
  }
  set(center, radius) {
    this.center.copy(center);
    this.radius = radius;
    return this;
  }
  setFromPoints(points, optionalCenter) {
    const center = this.center;
    if (optionalCenter !== void 0) {
      center.copy(optionalCenter);
    } else {
      _box$3.setFromPoints(points).getCenter(center);
    }
    let maxRadiusSq = 0;
    for (let i = 0, il = points.length; i < il; i++) {
      maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(points[i]));
    }
    this.radius = Math.sqrt(maxRadiusSq);
    return this;
  }
  copy(sphere) {
    this.center.copy(sphere.center);
    this.radius = sphere.radius;
    return this;
  }
  isEmpty() {
    return this.radius < 0;
  }
  makeEmpty() {
    this.center.set(0, 0, 0);
    this.radius = -1;
    return this;
  }
  containsPoint(point) {
    return point.distanceToSquared(this.center) <= this.radius * this.radius;
  }
  distanceToPoint(point) {
    return point.distanceTo(this.center) - this.radius;
  }
  intersectsSphere(sphere) {
    const radiusSum = this.radius + sphere.radius;
    return sphere.center.distanceToSquared(this.center) <= radiusSum * radiusSum;
  }
  intersectsBox(box) {
    return box.intersectsSphere(this);
  }
  intersectsPlane(plane) {
    return Math.abs(plane.distanceToPoint(this.center)) <= this.radius;
  }
  clampPoint(point, target) {
    const deltaLengthSq = this.center.distanceToSquared(point);
    target.copy(point);
    if (deltaLengthSq > this.radius * this.radius) {
      target.sub(this.center).normalize();
      target.multiplyScalar(this.radius).add(this.center);
    }
    return target;
  }
  getBoundingBox(target) {
    if (this.isEmpty()) {
      target.makeEmpty();
      return target;
    }
    target.set(this.center, this.center);
    target.expandByScalar(this.radius);
    return target;
  }
  applyMatrix4(matrix) {
    this.center.applyMatrix4(matrix);
    this.radius = this.radius * matrix.getMaxScaleOnAxis();
    return this;
  }
  translate(offset) {
    this.center.add(offset);
    return this;
  }
  expandByPoint(point) {
    if (this.isEmpty()) {
      this.center.copy(point);
      this.radius = 0;
      return this;
    }
    _v1$6.subVectors(point, this.center);
    const lengthSq = _v1$6.lengthSq();
    if (lengthSq > this.radius * this.radius) {
      const length = Math.sqrt(lengthSq);
      const delta = (length - this.radius) * 0.5;
      this.center.addScaledVector(_v1$6, delta / length);
      this.radius += delta;
    }
    return this;
  }
  union(sphere) {
    if (sphere.isEmpty()) {
      return this;
    }
    if (this.isEmpty()) {
      this.copy(sphere);
      return this;
    }
    if (this.center.equals(sphere.center) === true) {
      this.radius = Math.max(this.radius, sphere.radius);
    } else {
      _v2$3.subVectors(sphere.center, this.center).setLength(sphere.radius);
      this.expandByPoint(_v1$6.copy(sphere.center).add(_v2$3));
      this.expandByPoint(_v1$6.copy(sphere.center).sub(_v2$3));
    }
    return this;
  }
  equals(sphere) {
    return sphere.center.equals(this.center) && sphere.radius === this.radius;
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
const _vector$a = /* @__PURE__ */ new Vector3();
const _segCenter = /* @__PURE__ */ new Vector3();
const _segDir = /* @__PURE__ */ new Vector3();
const _diff = /* @__PURE__ */ new Vector3();
const _edge1 = /* @__PURE__ */ new Vector3();
const _edge2 = /* @__PURE__ */ new Vector3();
const _normal$1 = /* @__PURE__ */ new Vector3();
class Ray {
  static {
    __name(this, "Ray");
  }
  constructor(origin = new Vector3(), direction = new Vector3(0, 0, -1)) {
    this.origin = origin;
    this.direction = direction;
  }
  set(origin, direction) {
    this.origin.copy(origin);
    this.direction.copy(direction);
    return this;
  }
  copy(ray) {
    this.origin.copy(ray.origin);
    this.direction.copy(ray.direction);
    return this;
  }
  at(t, target) {
    return target.copy(this.origin).addScaledVector(this.direction, t);
  }
  lookAt(v) {
    this.direction.copy(v).sub(this.origin).normalize();
    return this;
  }
  recast(t) {
    this.origin.copy(this.at(t, _vector$a));
    return this;
  }
  closestPointToPoint(point, target) {
    target.subVectors(point, this.origin);
    const directionDistance = target.dot(this.direction);
    if (directionDistance < 0) {
      return target.copy(this.origin);
    }
    return target.copy(this.origin).addScaledVector(this.direction, directionDistance);
  }
  distanceToPoint(point) {
    return Math.sqrt(this.distanceSqToPoint(point));
  }
  distanceSqToPoint(point) {
    const directionDistance = _vector$a.subVectors(point, this.origin).dot(this.direction);
    if (directionDistance < 0) {
      return this.origin.distanceToSquared(point);
    }
    _vector$a.copy(this.origin).addScaledVector(this.direction, directionDistance);
    return _vector$a.distanceToSquared(point);
  }
  distanceSqToSegment(v0, v1, optionalPointOnRay, optionalPointOnSegment) {
    _segCenter.copy(v0).add(v1).multiplyScalar(0.5);
    _segDir.copy(v1).sub(v0).normalize();
    _diff.copy(this.origin).sub(_segCenter);
    const segExtent = v0.distanceTo(v1) * 0.5;
    const a01 = -this.direction.dot(_segDir);
    const b0 = _diff.dot(this.direction);
    const b1 = -_diff.dot(_segDir);
    const c = _diff.lengthSq();
    const det = Math.abs(1 - a01 * a01);
    let s0, s1, sqrDist, extDet;
    if (det > 0) {
      s0 = a01 * b1 - b0;
      s1 = a01 * b0 - b1;
      extDet = segExtent * det;
      if (s0 >= 0) {
        if (s1 >= -extDet) {
          if (s1 <= extDet) {
            const invDet = 1 / det;
            s0 *= invDet;
            s1 *= invDet;
            sqrDist = s0 * (s0 + a01 * s1 + 2 * b0) + s1 * (a01 * s0 + s1 + 2 * b1) + c;
          } else {
            s1 = segExtent;
            s0 = Math.max(0, -(a01 * s1 + b0));
            sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
          }
        } else {
          s1 = -segExtent;
          s0 = Math.max(0, -(a01 * s1 + b0));
          sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
        }
      } else {
        if (s1 <= -extDet) {
          s0 = Math.max(0, -(-a01 * segExtent + b0));
          s1 = s0 > 0 ? -segExtent : Math.min(Math.max(-segExtent, -b1), segExtent);
          sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
        } else if (s1 <= extDet) {
          s0 = 0;
          s1 = Math.min(Math.max(-segExtent, -b1), segExtent);
          sqrDist = s1 * (s1 + 2 * b1) + c;
        } else {
          s0 = Math.max(0, -(a01 * segExtent + b0));
          s1 = s0 > 0 ? segExtent : Math.min(Math.max(-segExtent, -b1), segExtent);
          sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
        }
      }
    } else {
      s1 = a01 > 0 ? -segExtent : segExtent;
      s0 = Math.max(0, -(a01 * s1 + b0));
      sqrDist = -s0 * s0 + s1 * (s1 + 2 * b1) + c;
    }
    if (optionalPointOnRay) {
      optionalPointOnRay.copy(this.origin).addScaledVector(this.direction, s0);
    }
    if (optionalPointOnSegment) {
      optionalPointOnSegment.copy(_segCenter).addScaledVector(_segDir, s1);
    }
    return sqrDist;
  }
  intersectSphere(sphere, target) {
    _vector$a.subVectors(sphere.center, this.origin);
    const tca = _vector$a.dot(this.direction);
    const d2 = _vector$a.dot(_vector$a) - tca * tca;
    const radius2 = sphere.radius * sphere.radius;
    if (d2 > radius2) return null;
    const thc = Math.sqrt(radius2 - d2);
    const t0 = tca - thc;
    const t1 = tca + thc;
    if (t1 < 0) return null;
    if (t0 < 0) return this.at(t1, target);
    return this.at(t0, target);
  }
  intersectsSphere(sphere) {
    return this.distanceSqToPoint(sphere.center) <= sphere.radius * sphere.radius;
  }
  distanceToPlane(plane) {
    const denominator = plane.normal.dot(this.direction);
    if (denominator === 0) {
      if (plane.distanceToPoint(this.origin) === 0) {
        return 0;
      }
      return null;
    }
    const t = -(this.origin.dot(plane.normal) + plane.constant) / denominator;
    return t >= 0 ? t : null;
  }
  intersectPlane(plane, target) {
    const t = this.distanceToPlane(plane);
    if (t === null) {
      return null;
    }
    return this.at(t, target);
  }
  intersectsPlane(plane) {
    const distToPoint = plane.distanceToPoint(this.origin);
    if (distToPoint === 0) {
      return true;
    }
    const denominator = plane.normal.dot(this.direction);
    if (denominator * distToPoint < 0) {
      return true;
    }
    return false;
  }
  intersectBox(box, target) {
    let tmin, tmax, tymin, tymax, tzmin, tzmax;
    const invdirx = 1 / this.direction.x, invdiry = 1 / this.direction.y, invdirz = 1 / this.direction.z;
    const origin = this.origin;
    if (invdirx >= 0) {
      tmin = (box.min.x - origin.x) * invdirx;
      tmax = (box.max.x - origin.x) * invdirx;
    } else {
      tmin = (box.max.x - origin.x) * invdirx;
      tmax = (box.min.x - origin.x) * invdirx;
    }
    if (invdiry >= 0) {
      tymin = (box.min.y - origin.y) * invdiry;
      tymax = (box.max.y - origin.y) * invdiry;
    } else {
      tymin = (box.max.y - origin.y) * invdiry;
      tymax = (box.min.y - origin.y) * invdiry;
    }
    if (tmin > tymax || tymin > tmax) return null;
    if (tymin > tmin || isNaN(tmin)) tmin = tymin;
    if (tymax < tmax || isNaN(tmax)) tmax = tymax;
    if (invdirz >= 0) {
      tzmin = (box.min.z - origin.z) * invdirz;
      tzmax = (box.max.z - origin.z) * invdirz;
    } else {
      tzmin = (box.max.z - origin.z) * invdirz;
      tzmax = (box.min.z - origin.z) * invdirz;
    }
    if (tmin > tzmax || tzmin > tmax) return null;
    if (tzmin > tmin || tmin !== tmin) tmin = tzmin;
    if (tzmax < tmax || tmax !== tmax) tmax = tzmax;
    if (tmax < 0) return null;
    return this.at(tmin >= 0 ? tmin : tmax, target);
  }
  intersectsBox(box) {
    return this.intersectBox(box, _vector$a) !== null;
  }
  intersectTriangle(a, b, c, backfaceCulling, target) {
    _edge1.subVectors(b, a);
    _edge2.subVectors(c, a);
    _normal$1.crossVectors(_edge1, _edge2);
    let DdN = this.direction.dot(_normal$1);
    let sign2;
    if (DdN > 0) {
      if (backfaceCulling) return null;
      sign2 = 1;
    } else if (DdN < 0) {
      sign2 = -1;
      DdN = -DdN;
    } else {
      return null;
    }
    _diff.subVectors(this.origin, a);
    const DdQxE2 = sign2 * this.direction.dot(_edge2.crossVectors(_diff, _edge2));
    if (DdQxE2 < 0) {
      return null;
    }
    const DdE1xQ = sign2 * this.direction.dot(_edge1.cross(_diff));
    if (DdE1xQ < 0) {
      return null;
    }
    if (DdQxE2 + DdE1xQ > DdN) {
      return null;
    }
    const QdN = -sign2 * _diff.dot(_normal$1);
    if (QdN < 0) {
      return null;
    }
    return this.at(QdN / DdN, target);
  }
  applyMatrix4(matrix4) {
    this.origin.applyMatrix4(matrix4);
    this.direction.transformDirection(matrix4);
    return this;
  }
  equals(ray) {
    return ray.origin.equals(this.origin) && ray.direction.equals(this.direction);
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
class Matrix4 {
  static {
    __name(this, "Matrix4");
  }
  constructor(n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44) {
    Matrix4.prototype.isMatrix4 = true;
    this.elements = [
      1,
      0,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      0,
      1
    ];
    if (n11 !== void 0) {
      this.set(n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44);
    }
  }
  set(n11, n12, n13, n14, n21, n22, n23, n24, n31, n32, n33, n34, n41, n42, n43, n44) {
    const te = this.elements;
    te[0] = n11;
    te[4] = n12;
    te[8] = n13;
    te[12] = n14;
    te[1] = n21;
    te[5] = n22;
    te[9] = n23;
    te[13] = n24;
    te[2] = n31;
    te[6] = n32;
    te[10] = n33;
    te[14] = n34;
    te[3] = n41;
    te[7] = n42;
    te[11] = n43;
    te[15] = n44;
    return this;
  }
  identity() {
    this.set(
      1,
      0,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      0,
      1
    );
    return this;
  }
  clone() {
    return new Matrix4().fromArray(this.elements);
  }
  copy(m) {
    const te = this.elements;
    const me = m.elements;
    te[0] = me[0];
    te[1] = me[1];
    te[2] = me[2];
    te[3] = me[3];
    te[4] = me[4];
    te[5] = me[5];
    te[6] = me[6];
    te[7] = me[7];
    te[8] = me[8];
    te[9] = me[9];
    te[10] = me[10];
    te[11] = me[11];
    te[12] = me[12];
    te[13] = me[13];
    te[14] = me[14];
    te[15] = me[15];
    return this;
  }
  copyPosition(m) {
    const te = this.elements, me = m.elements;
    te[12] = me[12];
    te[13] = me[13];
    te[14] = me[14];
    return this;
  }
  setFromMatrix3(m) {
    const me = m.elements;
    this.set(
      me[0],
      me[3],
      me[6],
      0,
      me[1],
      me[4],
      me[7],
      0,
      me[2],
      me[5],
      me[8],
      0,
      0,
      0,
      0,
      1
    );
    return this;
  }
  extractBasis(xAxis, yAxis, zAxis) {
    xAxis.setFromMatrixColumn(this, 0);
    yAxis.setFromMatrixColumn(this, 1);
    zAxis.setFromMatrixColumn(this, 2);
    return this;
  }
  makeBasis(xAxis, yAxis, zAxis) {
    this.set(
      xAxis.x,
      yAxis.x,
      zAxis.x,
      0,
      xAxis.y,
      yAxis.y,
      zAxis.y,
      0,
      xAxis.z,
      yAxis.z,
      zAxis.z,
      0,
      0,
      0,
      0,
      1
    );
    return this;
  }
  extractRotation(m) {
    const te = this.elements;
    const me = m.elements;
    const scaleX = 1 / _v1$5.setFromMatrixColumn(m, 0).length();
    const scaleY = 1 / _v1$5.setFromMatrixColumn(m, 1).length();
    const scaleZ = 1 / _v1$5.setFromMatrixColumn(m, 2).length();
    te[0] = me[0] * scaleX;
    te[1] = me[1] * scaleX;
    te[2] = me[2] * scaleX;
    te[3] = 0;
    te[4] = me[4] * scaleY;
    te[5] = me[5] * scaleY;
    te[6] = me[6] * scaleY;
    te[7] = 0;
    te[8] = me[8] * scaleZ;
    te[9] = me[9] * scaleZ;
    te[10] = me[10] * scaleZ;
    te[11] = 0;
    te[12] = 0;
    te[13] = 0;
    te[14] = 0;
    te[15] = 1;
    return this;
  }
  makeRotationFromEuler(euler) {
    const te = this.elements;
    const x = euler.x, y = euler.y, z = euler.z;
    const a = Math.cos(x), b = Math.sin(x);
    const c = Math.cos(y), d = Math.sin(y);
    const e = Math.cos(z), f = Math.sin(z);
    if (euler.order === "XYZ") {
      const ae = a * e, af = a * f, be = b * e, bf = b * f;
      te[0] = c * e;
      te[4] = -c * f;
      te[8] = d;
      te[1] = af + be * d;
      te[5] = ae - bf * d;
      te[9] = -b * c;
      te[2] = bf - ae * d;
      te[6] = be + af * d;
      te[10] = a * c;
    } else if (euler.order === "YXZ") {
      const ce = c * e, cf = c * f, de = d * e, df = d * f;
      te[0] = ce + df * b;
      te[4] = de * b - cf;
      te[8] = a * d;
      te[1] = a * f;
      te[5] = a * e;
      te[9] = -b;
      te[2] = cf * b - de;
      te[6] = df + ce * b;
      te[10] = a * c;
    } else if (euler.order === "ZXY") {
      const ce = c * e, cf = c * f, de = d * e, df = d * f;
      te[0] = ce - df * b;
      te[4] = -a * f;
      te[8] = de + cf * b;
      te[1] = cf + de * b;
      te[5] = a * e;
      te[9] = df - ce * b;
      te[2] = -a * d;
      te[6] = b;
      te[10] = a * c;
    } else if (euler.order === "ZYX") {
      const ae = a * e, af = a * f, be = b * e, bf = b * f;
      te[0] = c * e;
      te[4] = be * d - af;
      te[8] = ae * d + bf;
      te[1] = c * f;
      te[5] = bf * d + ae;
      te[9] = af * d - be;
      te[2] = -d;
      te[6] = b * c;
      te[10] = a * c;
    } else if (euler.order === "YZX") {
      const ac = a * c, ad = a * d, bc = b * c, bd = b * d;
      te[0] = c * e;
      te[4] = bd - ac * f;
      te[8] = bc * f + ad;
      te[1] = f;
      te[5] = a * e;
      te[9] = -b * e;
      te[2] = -d * e;
      te[6] = ad * f + bc;
      te[10] = ac - bd * f;
    } else if (euler.order === "XZY") {
      const ac = a * c, ad = a * d, bc = b * c, bd = b * d;
      te[0] = c * e;
      te[4] = -f;
      te[8] = d * e;
      te[1] = ac * f + bd;
      te[5] = a * e;
      te[9] = ad * f - bc;
      te[2] = bc * f - ad;
      te[6] = b * e;
      te[10] = bd * f + ac;
    }
    te[3] = 0;
    te[7] = 0;
    te[11] = 0;
    te[12] = 0;
    te[13] = 0;
    te[14] = 0;
    te[15] = 1;
    return this;
  }
  makeRotationFromQuaternion(q) {
    return this.compose(_zero, q, _one);
  }
  lookAt(eye, target, up) {
    const te = this.elements;
    _z.subVectors(eye, target);
    if (_z.lengthSq() === 0) {
      _z.z = 1;
    }
    _z.normalize();
    _x.crossVectors(up, _z);
    if (_x.lengthSq() === 0) {
      if (Math.abs(up.z) === 1) {
        _z.x += 1e-4;
      } else {
        _z.z += 1e-4;
      }
      _z.normalize();
      _x.crossVectors(up, _z);
    }
    _x.normalize();
    _y.crossVectors(_z, _x);
    te[0] = _x.x;
    te[4] = _y.x;
    te[8] = _z.x;
    te[1] = _x.y;
    te[5] = _y.y;
    te[9] = _z.y;
    te[2] = _x.z;
    te[6] = _y.z;
    te[10] = _z.z;
    return this;
  }
  multiply(m) {
    return this.multiplyMatrices(this, m);
  }
  premultiply(m) {
    return this.multiplyMatrices(m, this);
  }
  multiplyMatrices(a, b) {
    const ae = a.elements;
    const be = b.elements;
    const te = this.elements;
    const a11 = ae[0], a12 = ae[4], a13 = ae[8], a14 = ae[12];
    const a21 = ae[1], a22 = ae[5], a23 = ae[9], a24 = ae[13];
    const a31 = ae[2], a32 = ae[6], a33 = ae[10], a34 = ae[14];
    const a41 = ae[3], a42 = ae[7], a43 = ae[11], a44 = ae[15];
    const b11 = be[0], b12 = be[4], b13 = be[8], b14 = be[12];
    const b21 = be[1], b22 = be[5], b23 = be[9], b24 = be[13];
    const b31 = be[2], b32 = be[6], b33 = be[10], b34 = be[14];
    const b41 = be[3], b42 = be[7], b43 = be[11], b44 = be[15];
    te[0] = a11 * b11 + a12 * b21 + a13 * b31 + a14 * b41;
    te[4] = a11 * b12 + a12 * b22 + a13 * b32 + a14 * b42;
    te[8] = a11 * b13 + a12 * b23 + a13 * b33 + a14 * b43;
    te[12] = a11 * b14 + a12 * b24 + a13 * b34 + a14 * b44;
    te[1] = a21 * b11 + a22 * b21 + a23 * b31 + a24 * b41;
    te[5] = a21 * b12 + a22 * b22 + a23 * b32 + a24 * b42;
    te[9] = a21 * b13 + a22 * b23 + a23 * b33 + a24 * b43;
    te[13] = a21 * b14 + a22 * b24 + a23 * b34 + a24 * b44;
    te[2] = a31 * b11 + a32 * b21 + a33 * b31 + a34 * b41;
    te[6] = a31 * b12 + a32 * b22 + a33 * b32 + a34 * b42;
    te[10] = a31 * b13 + a32 * b23 + a33 * b33 + a34 * b43;
    te[14] = a31 * b14 + a32 * b24 + a33 * b34 + a34 * b44;
    te[3] = a41 * b11 + a42 * b21 + a43 * b31 + a44 * b41;
    te[7] = a41 * b12 + a42 * b22 + a43 * b32 + a44 * b42;
    te[11] = a41 * b13 + a42 * b23 + a43 * b33 + a44 * b43;
    te[15] = a41 * b14 + a42 * b24 + a43 * b34 + a44 * b44;
    return this;
  }
  multiplyScalar(s) {
    const te = this.elements;
    te[0] *= s;
    te[4] *= s;
    te[8] *= s;
    te[12] *= s;
    te[1] *= s;
    te[5] *= s;
    te[9] *= s;
    te[13] *= s;
    te[2] *= s;
    te[6] *= s;
    te[10] *= s;
    te[14] *= s;
    te[3] *= s;
    te[7] *= s;
    te[11] *= s;
    te[15] *= s;
    return this;
  }
  determinant() {
    const te = this.elements;
    const n11 = te[0], n12 = te[4], n13 = te[8], n14 = te[12];
    const n21 = te[1], n22 = te[5], n23 = te[9], n24 = te[13];
    const n31 = te[2], n32 = te[6], n33 = te[10], n34 = te[14];
    const n41 = te[3], n42 = te[7], n43 = te[11], n44 = te[15];
    return n41 * (+n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34) + n42 * (+n11 * n23 * n34 - n11 * n24 * n33 + n14 * n21 * n33 - n13 * n21 * n34 + n13 * n24 * n31 - n14 * n23 * n31) + n43 * (+n11 * n24 * n32 - n11 * n22 * n34 - n14 * n21 * n32 + n12 * n21 * n34 + n14 * n22 * n31 - n12 * n24 * n31) + n44 * (-n13 * n22 * n31 - n11 * n23 * n32 + n11 * n22 * n33 + n13 * n21 * n32 - n12 * n21 * n33 + n12 * n23 * n31);
  }
  transpose() {
    const te = this.elements;
    let tmp;
    tmp = te[1];
    te[1] = te[4];
    te[4] = tmp;
    tmp = te[2];
    te[2] = te[8];
    te[8] = tmp;
    tmp = te[6];
    te[6] = te[9];
    te[9] = tmp;
    tmp = te[3];
    te[3] = te[12];
    te[12] = tmp;
    tmp = te[7];
    te[7] = te[13];
    te[13] = tmp;
    tmp = te[11];
    te[11] = te[14];
    te[14] = tmp;
    return this;
  }
  setPosition(x, y, z) {
    const te = this.elements;
    if (x.isVector3) {
      te[12] = x.x;
      te[13] = x.y;
      te[14] = x.z;
    } else {
      te[12] = x;
      te[13] = y;
      te[14] = z;
    }
    return this;
  }
  invert() {
    const te = this.elements, n11 = te[0], n21 = te[1], n31 = te[2], n41 = te[3], n12 = te[4], n22 = te[5], n32 = te[6], n42 = te[7], n13 = te[8], n23 = te[9], n33 = te[10], n43 = te[11], n14 = te[12], n24 = te[13], n34 = te[14], n44 = te[15], t11 = n23 * n34 * n42 - n24 * n33 * n42 + n24 * n32 * n43 - n22 * n34 * n43 - n23 * n32 * n44 + n22 * n33 * n44, t12 = n14 * n33 * n42 - n13 * n34 * n42 - n14 * n32 * n43 + n12 * n34 * n43 + n13 * n32 * n44 - n12 * n33 * n44, t13 = n13 * n24 * n42 - n14 * n23 * n42 + n14 * n22 * n43 - n12 * n24 * n43 - n13 * n22 * n44 + n12 * n23 * n44, t14 = n14 * n23 * n32 - n13 * n24 * n32 - n14 * n22 * n33 + n12 * n24 * n33 + n13 * n22 * n34 - n12 * n23 * n34;
    const det = n11 * t11 + n21 * t12 + n31 * t13 + n41 * t14;
    if (det === 0) return this.set(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
    const detInv = 1 / det;
    te[0] = t11 * detInv;
    te[1] = (n24 * n33 * n41 - n23 * n34 * n41 - n24 * n31 * n43 + n21 * n34 * n43 + n23 * n31 * n44 - n21 * n33 * n44) * detInv;
    te[2] = (n22 * n34 * n41 - n24 * n32 * n41 + n24 * n31 * n42 - n21 * n34 * n42 - n22 * n31 * n44 + n21 * n32 * n44) * detInv;
    te[3] = (n23 * n32 * n41 - n22 * n33 * n41 - n23 * n31 * n42 + n21 * n33 * n42 + n22 * n31 * n43 - n21 * n32 * n43) * detInv;
    te[4] = t12 * detInv;
    te[5] = (n13 * n34 * n41 - n14 * n33 * n41 + n14 * n31 * n43 - n11 * n34 * n43 - n13 * n31 * n44 + n11 * n33 * n44) * detInv;
    te[6] = (n14 * n32 * n41 - n12 * n34 * n41 - n14 * n31 * n42 + n11 * n34 * n42 + n12 * n31 * n44 - n11 * n32 * n44) * detInv;
    te[7] = (n12 * n33 * n41 - n13 * n32 * n41 + n13 * n31 * n42 - n11 * n33 * n42 - n12 * n31 * n43 + n11 * n32 * n43) * detInv;
    te[8] = t13 * detInv;
    te[9] = (n14 * n23 * n41 - n13 * n24 * n41 - n14 * n21 * n43 + n11 * n24 * n43 + n13 * n21 * n44 - n11 * n23 * n44) * detInv;
    te[10] = (n12 * n24 * n41 - n14 * n22 * n41 + n14 * n21 * n42 - n11 * n24 * n42 - n12 * n21 * n44 + n11 * n22 * n44) * detInv;
    te[11] = (n13 * n22 * n41 - n12 * n23 * n41 - n13 * n21 * n42 + n11 * n23 * n42 + n12 * n21 * n43 - n11 * n22 * n43) * detInv;
    te[12] = t14 * detInv;
    te[13] = (n13 * n24 * n31 - n14 * n23 * n31 + n14 * n21 * n33 - n11 * n24 * n33 - n13 * n21 * n34 + n11 * n23 * n34) * detInv;
    te[14] = (n14 * n22 * n31 - n12 * n24 * n31 - n14 * n21 * n32 + n11 * n24 * n32 + n12 * n21 * n34 - n11 * n22 * n34) * detInv;
    te[15] = (n12 * n23 * n31 - n13 * n22 * n31 + n13 * n21 * n32 - n11 * n23 * n32 - n12 * n21 * n33 + n11 * n22 * n33) * detInv;
    return this;
  }
  scale(v) {
    const te = this.elements;
    const x = v.x, y = v.y, z = v.z;
    te[0] *= x;
    te[4] *= y;
    te[8] *= z;
    te[1] *= x;
    te[5] *= y;
    te[9] *= z;
    te[2] *= x;
    te[6] *= y;
    te[10] *= z;
    te[3] *= x;
    te[7] *= y;
    te[11] *= z;
    return this;
  }
  getMaxScaleOnAxis() {
    const te = this.elements;
    const scaleXSq = te[0] * te[0] + te[1] * te[1] + te[2] * te[2];
    const scaleYSq = te[4] * te[4] + te[5] * te[5] + te[6] * te[6];
    const scaleZSq = te[8] * te[8] + te[9] * te[9] + te[10] * te[10];
    return Math.sqrt(Math.max(scaleXSq, scaleYSq, scaleZSq));
  }
  makeTranslation(x, y, z) {
    if (x.isVector3) {
      this.set(
        1,
        0,
        0,
        x.x,
        0,
        1,
        0,
        x.y,
        0,
        0,
        1,
        x.z,
        0,
        0,
        0,
        1
      );
    } else {
      this.set(
        1,
        0,
        0,
        x,
        0,
        1,
        0,
        y,
        0,
        0,
        1,
        z,
        0,
        0,
        0,
        1
      );
    }
    return this;
  }
  makeRotationX(theta) {
    const c = Math.cos(theta), s = Math.sin(theta);
    this.set(
      1,
      0,
      0,
      0,
      0,
      c,
      -s,
      0,
      0,
      s,
      c,
      0,
      0,
      0,
      0,
      1
    );
    return this;
  }
  makeRotationY(theta) {
    const c = Math.cos(theta), s = Math.sin(theta);
    this.set(
      c,
      0,
      s,
      0,
      0,
      1,
      0,
      0,
      -s,
      0,
      c,
      0,
      0,
      0,
      0,
      1
    );
    return this;
  }
  makeRotationZ(theta) {
    const c = Math.cos(theta), s = Math.sin(theta);
    this.set(
      c,
      -s,
      0,
      0,
      s,
      c,
      0,
      0,
      0,
      0,
      1,
      0,
      0,
      0,
      0,
      1
    );
    return this;
  }
  makeRotationAxis(axis, angle) {
    const c = Math.cos(angle);
    const s = Math.sin(angle);
    const t = 1 - c;
    const x = axis.x, y = axis.y, z = axis.z;
    const tx = t * x, ty = t * y;
    this.set(
      tx * x + c,
      tx * y - s * z,
      tx * z + s * y,
      0,
      tx * y + s * z,
      ty * y + c,
      ty * z - s * x,
      0,
      tx * z - s * y,
      ty * z + s * x,
      t * z * z + c,
      0,
      0,
      0,
      0,
      1
    );
    return this;
  }
  makeScale(x, y, z) {
    this.set(
      x,
      0,
      0,
      0,
      0,
      y,
      0,
      0,
      0,
      0,
      z,
      0,
      0,
      0,
      0,
      1
    );
    return this;
  }
  makeShear(xy, xz, yx, yz, zx, zy) {
    this.set(
      1,
      yx,
      zx,
      0,
      xy,
      1,
      zy,
      0,
      xz,
      yz,
      1,
      0,
      0,
      0,
      0,
      1
    );
    return this;
  }
  compose(position, quaternion, scale) {
    const te = this.elements;
    const x = quaternion._x, y = quaternion._y, z = quaternion._z, w = quaternion._w;
    const x2 = x + x, y2 = y + y, z2 = z + z;
    const xx = x * x2, xy = x * y2, xz = x * z2;
    const yy = y * y2, yz = y * z2, zz = z * z2;
    const wx = w * x2, wy = w * y2, wz = w * z2;
    const sx = scale.x, sy = scale.y, sz = scale.z;
    te[0] = (1 - (yy + zz)) * sx;
    te[1] = (xy + wz) * sx;
    te[2] = (xz - wy) * sx;
    te[3] = 0;
    te[4] = (xy - wz) * sy;
    te[5] = (1 - (xx + zz)) * sy;
    te[6] = (yz + wx) * sy;
    te[7] = 0;
    te[8] = (xz + wy) * sz;
    te[9] = (yz - wx) * sz;
    te[10] = (1 - (xx + yy)) * sz;
    te[11] = 0;
    te[12] = position.x;
    te[13] = position.y;
    te[14] = position.z;
    te[15] = 1;
    return this;
  }
  decompose(position, quaternion, scale) {
    const te = this.elements;
    let sx = _v1$5.set(te[0], te[1], te[2]).length();
    const sy = _v1$5.set(te[4], te[5], te[6]).length();
    const sz = _v1$5.set(te[8], te[9], te[10]).length();
    const det = this.determinant();
    if (det < 0) sx = -sx;
    position.x = te[12];
    position.y = te[13];
    position.z = te[14];
    _m1$4.copy(this);
    const invSX = 1 / sx;
    const invSY = 1 / sy;
    const invSZ = 1 / sz;
    _m1$4.elements[0] *= invSX;
    _m1$4.elements[1] *= invSX;
    _m1$4.elements[2] *= invSX;
    _m1$4.elements[4] *= invSY;
    _m1$4.elements[5] *= invSY;
    _m1$4.elements[6] *= invSY;
    _m1$4.elements[8] *= invSZ;
    _m1$4.elements[9] *= invSZ;
    _m1$4.elements[10] *= invSZ;
    quaternion.setFromRotationMatrix(_m1$4);
    scale.x = sx;
    scale.y = sy;
    scale.z = sz;
    return this;
  }
  makePerspective(left, right, top, bottom, near, far, coordinateSystem = WebGLCoordinateSystem) {
    const te = this.elements;
    const x = 2 * near / (right - left);
    const y = 2 * near / (top - bottom);
    const a = (right + left) / (right - left);
    const b = (top + bottom) / (top - bottom);
    let c, d;
    if (coordinateSystem === WebGLCoordinateSystem) {
      c = -(far + near) / (far - near);
      d = -2 * far * near / (far - near);
    } else if (coordinateSystem === WebGPUCoordinateSystem) {
      c = -far / (far - near);
      d = -far * near / (far - near);
    } else {
      throw new Error("THREE.Matrix4.makePerspective(): Invalid coordinate system: " + coordinateSystem);
    }
    te[0] = x;
    te[4] = 0;
    te[8] = a;
    te[12] = 0;
    te[1] = 0;
    te[5] = y;
    te[9] = b;
    te[13] = 0;
    te[2] = 0;
    te[6] = 0;
    te[10] = c;
    te[14] = d;
    te[3] = 0;
    te[7] = 0;
    te[11] = -1;
    te[15] = 0;
    return this;
  }
  makeOrthographic(left, right, top, bottom, near, far, coordinateSystem = WebGLCoordinateSystem) {
    const te = this.elements;
    const w = 1 / (right - left);
    const h = 1 / (top - bottom);
    const p = 1 / (far - near);
    const x = (right + left) * w;
    const y = (top + bottom) * h;
    let z, zInv;
    if (coordinateSystem === WebGLCoordinateSystem) {
      z = (far + near) * p;
      zInv = -2 * p;
    } else if (coordinateSystem === WebGPUCoordinateSystem) {
      z = near * p;
      zInv = -1 * p;
    } else {
      throw new Error("THREE.Matrix4.makeOrthographic(): Invalid coordinate system: " + coordinateSystem);
    }
    te[0] = 2 * w;
    te[4] = 0;
    te[8] = 0;
    te[12] = -x;
    te[1] = 0;
    te[5] = 2 * h;
    te[9] = 0;
    te[13] = -y;
    te[2] = 0;
    te[6] = 0;
    te[10] = zInv;
    te[14] = -z;
    te[3] = 0;
    te[7] = 0;
    te[11] = 0;
    te[15] = 1;
    return this;
  }
  equals(matrix) {
    const te = this.elements;
    const me = matrix.elements;
    for (let i = 0; i < 16; i++) {
      if (te[i] !== me[i]) return false;
    }
    return true;
  }
  fromArray(array, offset = 0) {
    for (let i = 0; i < 16; i++) {
      this.elements[i] = array[i + offset];
    }
    return this;
  }
  toArray(array = [], offset = 0) {
    const te = this.elements;
    array[offset] = te[0];
    array[offset + 1] = te[1];
    array[offset + 2] = te[2];
    array[offset + 3] = te[3];
    array[offset + 4] = te[4];
    array[offset + 5] = te[5];
    array[offset + 6] = te[6];
    array[offset + 7] = te[7];
    array[offset + 8] = te[8];
    array[offset + 9] = te[9];
    array[offset + 10] = te[10];
    array[offset + 11] = te[11];
    array[offset + 12] = te[12];
    array[offset + 13] = te[13];
    array[offset + 14] = te[14];
    array[offset + 15] = te[15];
    return array;
  }
}
const _v1$5 = /* @__PURE__ */ new Vector3();
const _m1$4 = /* @__PURE__ */ new Matrix4();
const _zero = /* @__PURE__ */ new Vector3(0, 0, 0);
const _one = /* @__PURE__ */ new Vector3(1, 1, 1);
const _x = /* @__PURE__ */ new Vector3();
const _y = /* @__PURE__ */ new Vector3();
const _z = /* @__PURE__ */ new Vector3();
const _matrix$2 = /* @__PURE__ */ new Matrix4();
const _quaternion$3 = /* @__PURE__ */ new Quaternion();
class Euler {
  static {
    __name(this, "Euler");
  }
  constructor(x = 0, y = 0, z = 0, order = Euler.DEFAULT_ORDER) {
    this.isEuler = true;
    this._x = x;
    this._y = y;
    this._z = z;
    this._order = order;
  }
  get x() {
    return this._x;
  }
  set x(value) {
    this._x = value;
    this._onChangeCallback();
  }
  get y() {
    return this._y;
  }
  set y(value) {
    this._y = value;
    this._onChangeCallback();
  }
  get z() {
    return this._z;
  }
  set z(value) {
    this._z = value;
    this._onChangeCallback();
  }
  get order() {
    return this._order;
  }
  set order(value) {
    this._order = value;
    this._onChangeCallback();
  }
  set(x, y, z, order = this._order) {
    this._x = x;
    this._y = y;
    this._z = z;
    this._order = order;
    this._onChangeCallback();
    return this;
  }
  clone() {
    return new this.constructor(this._x, this._y, this._z, this._order);
  }
  copy(euler) {
    this._x = euler._x;
    this._y = euler._y;
    this._z = euler._z;
    this._order = euler._order;
    this._onChangeCallback();
    return this;
  }
  setFromRotationMatrix(m, order = this._order, update = true) {
    const te = m.elements;
    const m11 = te[0], m12 = te[4], m13 = te[8];
    const m21 = te[1], m22 = te[5], m23 = te[9];
    const m31 = te[2], m32 = te[6], m33 = te[10];
    switch (order) {
      case "XYZ":
        this._y = Math.asin(clamp(m13, -1, 1));
        if (Math.abs(m13) < 0.9999999) {
          this._x = Math.atan2(-m23, m33);
          this._z = Math.atan2(-m12, m11);
        } else {
          this._x = Math.atan2(m32, m22);
          this._z = 0;
        }
        break;
      case "YXZ":
        this._x = Math.asin(-clamp(m23, -1, 1));
        if (Math.abs(m23) < 0.9999999) {
          this._y = Math.atan2(m13, m33);
          this._z = Math.atan2(m21, m22);
        } else {
          this._y = Math.atan2(-m31, m11);
          this._z = 0;
        }
        break;
      case "ZXY":
        this._x = Math.asin(clamp(m32, -1, 1));
        if (Math.abs(m32) < 0.9999999) {
          this._y = Math.atan2(-m31, m33);
          this._z = Math.atan2(-m12, m22);
        } else {
          this._y = 0;
          this._z = Math.atan2(m21, m11);
        }
        break;
      case "ZYX":
        this._y = Math.asin(-clamp(m31, -1, 1));
        if (Math.abs(m31) < 0.9999999) {
          this._x = Math.atan2(m32, m33);
          this._z = Math.atan2(m21, m11);
        } else {
          this._x = 0;
          this._z = Math.atan2(-m12, m22);
        }
        break;
      case "YZX":
        this._z = Math.asin(clamp(m21, -1, 1));
        if (Math.abs(m21) < 0.9999999) {
          this._x = Math.atan2(-m23, m22);
          this._y = Math.atan2(-m31, m11);
        } else {
          this._x = 0;
          this._y = Math.atan2(m13, m33);
        }
        break;
      case "XZY":
        this._z = Math.asin(-clamp(m12, -1, 1));
        if (Math.abs(m12) < 0.9999999) {
          this._x = Math.atan2(m32, m22);
          this._y = Math.atan2(m13, m11);
        } else {
          this._x = Math.atan2(-m23, m33);
          this._y = 0;
        }
        break;
      default:
        console.warn("THREE.Euler: .setFromRotationMatrix() encountered an unknown order: " + order);
    }
    this._order = order;
    if (update === true) this._onChangeCallback();
    return this;
  }
  setFromQuaternion(q, order, update) {
    _matrix$2.makeRotationFromQuaternion(q);
    return this.setFromRotationMatrix(_matrix$2, order, update);
  }
  setFromVector3(v, order = this._order) {
    return this.set(v.x, v.y, v.z, order);
  }
  reorder(newOrder) {
    _quaternion$3.setFromEuler(this);
    return this.setFromQuaternion(_quaternion$3, newOrder);
  }
  equals(euler) {
    return euler._x === this._x && euler._y === this._y && euler._z === this._z && euler._order === this._order;
  }
  fromArray(array) {
    this._x = array[0];
    this._y = array[1];
    this._z = array[2];
    if (array[3] !== void 0) this._order = array[3];
    this._onChangeCallback();
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this._x;
    array[offset + 1] = this._y;
    array[offset + 2] = this._z;
    array[offset + 3] = this._order;
    return array;
  }
  _onChange(callback) {
    this._onChangeCallback = callback;
    return this;
  }
  _onChangeCallback() {
  }
  *[Symbol.iterator]() {
    yield this._x;
    yield this._y;
    yield this._z;
    yield this._order;
  }
}
Euler.DEFAULT_ORDER = "XYZ";
class Layers {
  static {
    __name(this, "Layers");
  }
  constructor() {
    this.mask = 1 | 0;
  }
  set(channel) {
    this.mask = (1 << channel | 0) >>> 0;
  }
  enable(channel) {
    this.mask |= 1 << channel | 0;
  }
  enableAll() {
    this.mask = 4294967295 | 0;
  }
  toggle(channel) {
    this.mask ^= 1 << channel | 0;
  }
  disable(channel) {
    this.mask &= ~(1 << channel | 0);
  }
  disableAll() {
    this.mask = 0;
  }
  test(layers) {
    return (this.mask & layers.mask) !== 0;
  }
  isEnabled(channel) {
    return (this.mask & (1 << channel | 0)) !== 0;
  }
}
let _object3DId = 0;
const _v1$4 = /* @__PURE__ */ new Vector3();
const _q1 = /* @__PURE__ */ new Quaternion();
const _m1$3 = /* @__PURE__ */ new Matrix4();
const _target = /* @__PURE__ */ new Vector3();
const _position$3 = /* @__PURE__ */ new Vector3();
const _scale$2 = /* @__PURE__ */ new Vector3();
const _quaternion$2 = /* @__PURE__ */ new Quaternion();
const _xAxis = /* @__PURE__ */ new Vector3(1, 0, 0);
const _yAxis = /* @__PURE__ */ new Vector3(0, 1, 0);
const _zAxis = /* @__PURE__ */ new Vector3(0, 0, 1);
const _addedEvent = { type: "added" };
const _removedEvent = { type: "removed" };
const _childaddedEvent = { type: "childadded", child: null };
const _childremovedEvent = { type: "childremoved", child: null };
class Object3D extends EventDispatcher {
  static {
    __name(this, "Object3D");
  }
  constructor() {
    super();
    this.isObject3D = true;
    Object.defineProperty(this, "id", { value: _object3DId++ });
    this.uuid = generateUUID();
    this.name = "";
    this.type = "Object3D";
    this.parent = null;
    this.children = [];
    this.up = Object3D.DEFAULT_UP.clone();
    const position = new Vector3();
    const rotation = new Euler();
    const quaternion = new Quaternion();
    const scale = new Vector3(1, 1, 1);
    function onRotationChange() {
      quaternion.setFromEuler(rotation, false);
    }
    __name(onRotationChange, "onRotationChange");
    function onQuaternionChange() {
      rotation.setFromQuaternion(quaternion, void 0, false);
    }
    __name(onQuaternionChange, "onQuaternionChange");
    rotation._onChange(onRotationChange);
    quaternion._onChange(onQuaternionChange);
    Object.defineProperties(this, {
      position: {
        configurable: true,
        enumerable: true,
        value: position
      },
      rotation: {
        configurable: true,
        enumerable: true,
        value: rotation
      },
      quaternion: {
        configurable: true,
        enumerable: true,
        value: quaternion
      },
      scale: {
        configurable: true,
        enumerable: true,
        value: scale
      },
      modelViewMatrix: {
        value: new Matrix4()
      },
      normalMatrix: {
        value: new Matrix3()
      }
    });
    this.matrix = new Matrix4();
    this.matrixWorld = new Matrix4();
    this.matrixAutoUpdate = Object3D.DEFAULT_MATRIX_AUTO_UPDATE;
    this.matrixWorldAutoUpdate = Object3D.DEFAULT_MATRIX_WORLD_AUTO_UPDATE;
    this.matrixWorldNeedsUpdate = false;
    this.layers = new Layers();
    this.visible = true;
    this.castShadow = false;
    this.receiveShadow = false;
    this.frustumCulled = true;
    this.renderOrder = 0;
    this.animations = [];
    this.userData = {};
  }
  onBeforeShadow() {
  }
  onAfterShadow() {
  }
  onBeforeRender() {
  }
  onAfterRender() {
  }
  applyMatrix4(matrix) {
    if (this.matrixAutoUpdate) this.updateMatrix();
    this.matrix.premultiply(matrix);
    this.matrix.decompose(this.position, this.quaternion, this.scale);
  }
  applyQuaternion(q) {
    this.quaternion.premultiply(q);
    return this;
  }
  setRotationFromAxisAngle(axis, angle) {
    this.quaternion.setFromAxisAngle(axis, angle);
  }
  setRotationFromEuler(euler) {
    this.quaternion.setFromEuler(euler, true);
  }
  setRotationFromMatrix(m) {
    this.quaternion.setFromRotationMatrix(m);
  }
  setRotationFromQuaternion(q) {
    this.quaternion.copy(q);
  }
  rotateOnAxis(axis, angle) {
    _q1.setFromAxisAngle(axis, angle);
    this.quaternion.multiply(_q1);
    return this;
  }
  rotateOnWorldAxis(axis, angle) {
    _q1.setFromAxisAngle(axis, angle);
    this.quaternion.premultiply(_q1);
    return this;
  }
  rotateX(angle) {
    return this.rotateOnAxis(_xAxis, angle);
  }
  rotateY(angle) {
    return this.rotateOnAxis(_yAxis, angle);
  }
  rotateZ(angle) {
    return this.rotateOnAxis(_zAxis, angle);
  }
  translateOnAxis(axis, distance) {
    _v1$4.copy(axis).applyQuaternion(this.quaternion);
    this.position.add(_v1$4.multiplyScalar(distance));
    return this;
  }
  translateX(distance) {
    return this.translateOnAxis(_xAxis, distance);
  }
  translateY(distance) {
    return this.translateOnAxis(_yAxis, distance);
  }
  translateZ(distance) {
    return this.translateOnAxis(_zAxis, distance);
  }
  localToWorld(vector) {
    this.updateWorldMatrix(true, false);
    return vector.applyMatrix4(this.matrixWorld);
  }
  worldToLocal(vector) {
    this.updateWorldMatrix(true, false);
    return vector.applyMatrix4(_m1$3.copy(this.matrixWorld).invert());
  }
  lookAt(x, y, z) {
    if (x.isVector3) {
      _target.copy(x);
    } else {
      _target.set(x, y, z);
    }
    const parent = this.parent;
    this.updateWorldMatrix(true, false);
    _position$3.setFromMatrixPosition(this.matrixWorld);
    if (this.isCamera || this.isLight) {
      _m1$3.lookAt(_position$3, _target, this.up);
    } else {
      _m1$3.lookAt(_target, _position$3, this.up);
    }
    this.quaternion.setFromRotationMatrix(_m1$3);
    if (parent) {
      _m1$3.extractRotation(parent.matrixWorld);
      _q1.setFromRotationMatrix(_m1$3);
      this.quaternion.premultiply(_q1.invert());
    }
  }
  add(object) {
    if (arguments.length > 1) {
      for (let i = 0; i < arguments.length; i++) {
        this.add(arguments[i]);
      }
      return this;
    }
    if (object === this) {
      console.error("THREE.Object3D.add: object can't be added as a child of itself.", object);
      return this;
    }
    if (object && object.isObject3D) {
      object.removeFromParent();
      object.parent = this;
      this.children.push(object);
      object.dispatchEvent(_addedEvent);
      _childaddedEvent.child = object;
      this.dispatchEvent(_childaddedEvent);
      _childaddedEvent.child = null;
    } else {
      console.error("THREE.Object3D.add: object not an instance of THREE.Object3D.", object);
    }
    return this;
  }
  remove(object) {
    if (arguments.length > 1) {
      for (let i = 0; i < arguments.length; i++) {
        this.remove(arguments[i]);
      }
      return this;
    }
    const index = this.children.indexOf(object);
    if (index !== -1) {
      object.parent = null;
      this.children.splice(index, 1);
      object.dispatchEvent(_removedEvent);
      _childremovedEvent.child = object;
      this.dispatchEvent(_childremovedEvent);
      _childremovedEvent.child = null;
    }
    return this;
  }
  removeFromParent() {
    const parent = this.parent;
    if (parent !== null) {
      parent.remove(this);
    }
    return this;
  }
  clear() {
    return this.remove(...this.children);
  }
  attach(object) {
    this.updateWorldMatrix(true, false);
    _m1$3.copy(this.matrixWorld).invert();
    if (object.parent !== null) {
      object.parent.updateWorldMatrix(true, false);
      _m1$3.multiply(object.parent.matrixWorld);
    }
    object.applyMatrix4(_m1$3);
    object.removeFromParent();
    object.parent = this;
    this.children.push(object);
    object.updateWorldMatrix(false, true);
    object.dispatchEvent(_addedEvent);
    _childaddedEvent.child = object;
    this.dispatchEvent(_childaddedEvent);
    _childaddedEvent.child = null;
    return this;
  }
  getObjectById(id) {
    return this.getObjectByProperty("id", id);
  }
  getObjectByName(name) {
    return this.getObjectByProperty("name", name);
  }
  getObjectByProperty(name, value) {
    if (this[name] === value) return this;
    for (let i = 0, l = this.children.length; i < l; i++) {
      const child = this.children[i];
      const object = child.getObjectByProperty(name, value);
      if (object !== void 0) {
        return object;
      }
    }
    return void 0;
  }
  getObjectsByProperty(name, value, result = []) {
    if (this[name] === value) result.push(this);
    const children = this.children;
    for (let i = 0, l = children.length; i < l; i++) {
      children[i].getObjectsByProperty(name, value, result);
    }
    return result;
  }
  getWorldPosition(target) {
    this.updateWorldMatrix(true, false);
    return target.setFromMatrixPosition(this.matrixWorld);
  }
  getWorldQuaternion(target) {
    this.updateWorldMatrix(true, false);
    this.matrixWorld.decompose(_position$3, target, _scale$2);
    return target;
  }
  getWorldScale(target) {
    this.updateWorldMatrix(true, false);
    this.matrixWorld.decompose(_position$3, _quaternion$2, target);
    return target;
  }
  getWorldDirection(target) {
    this.updateWorldMatrix(true, false);
    const e = this.matrixWorld.elements;
    return target.set(e[8], e[9], e[10]).normalize();
  }
  raycast() {
  }
  traverse(callback) {
    callback(this);
    const children = this.children;
    for (let i = 0, l = children.length; i < l; i++) {
      children[i].traverse(callback);
    }
  }
  traverseVisible(callback) {
    if (this.visible === false) return;
    callback(this);
    const children = this.children;
    for (let i = 0, l = children.length; i < l; i++) {
      children[i].traverseVisible(callback);
    }
  }
  traverseAncestors(callback) {
    const parent = this.parent;
    if (parent !== null) {
      callback(parent);
      parent.traverseAncestors(callback);
    }
  }
  updateMatrix() {
    this.matrix.compose(this.position, this.quaternion, this.scale);
    this.matrixWorldNeedsUpdate = true;
  }
  updateMatrixWorld(force) {
    if (this.matrixAutoUpdate) this.updateMatrix();
    if (this.matrixWorldNeedsUpdate || force) {
      if (this.matrixWorldAutoUpdate === true) {
        if (this.parent === null) {
          this.matrixWorld.copy(this.matrix);
        } else {
          this.matrixWorld.multiplyMatrices(this.parent.matrixWorld, this.matrix);
        }
      }
      this.matrixWorldNeedsUpdate = false;
      force = true;
    }
    const children = this.children;
    for (let i = 0, l = children.length; i < l; i++) {
      const child = children[i];
      child.updateMatrixWorld(force);
    }
  }
  updateWorldMatrix(updateParents, updateChildren) {
    const parent = this.parent;
    if (updateParents === true && parent !== null) {
      parent.updateWorldMatrix(true, false);
    }
    if (this.matrixAutoUpdate) this.updateMatrix();
    if (this.matrixWorldAutoUpdate === true) {
      if (this.parent === null) {
        this.matrixWorld.copy(this.matrix);
      } else {
        this.matrixWorld.multiplyMatrices(this.parent.matrixWorld, this.matrix);
      }
    }
    if (updateChildren === true) {
      const children = this.children;
      for (let i = 0, l = children.length; i < l; i++) {
        const child = children[i];
        child.updateWorldMatrix(false, true);
      }
    }
  }
  toJSON(meta) {
    const isRootObject = meta === void 0 || typeof meta === "string";
    const output = {};
    if (isRootObject) {
      meta = {
        geometries: {},
        materials: {},
        textures: {},
        images: {},
        shapes: {},
        skeletons: {},
        animations: {},
        nodes: {}
      };
      output.metadata = {
        version: 4.6,
        type: "Object",
        generator: "Object3D.toJSON"
      };
    }
    const object = {};
    object.uuid = this.uuid;
    object.type = this.type;
    if (this.name !== "") object.name = this.name;
    if (this.castShadow === true) object.castShadow = true;
    if (this.receiveShadow === true) object.receiveShadow = true;
    if (this.visible === false) object.visible = false;
    if (this.frustumCulled === false) object.frustumCulled = false;
    if (this.renderOrder !== 0) object.renderOrder = this.renderOrder;
    if (Object.keys(this.userData).length > 0) object.userData = this.userData;
    object.layers = this.layers.mask;
    object.matrix = this.matrix.toArray();
    object.up = this.up.toArray();
    if (this.matrixAutoUpdate === false) object.matrixAutoUpdate = false;
    if (this.isInstancedMesh) {
      object.type = "InstancedMesh";
      object.count = this.count;
      object.instanceMatrix = this.instanceMatrix.toJSON();
      if (this.instanceColor !== null) object.instanceColor = this.instanceColor.toJSON();
    }
    if (this.isBatchedMesh) {
      object.type = "BatchedMesh";
      object.perObjectFrustumCulled = this.perObjectFrustumCulled;
      object.sortObjects = this.sortObjects;
      object.drawRanges = this._drawRanges;
      object.reservedRanges = this._reservedRanges;
      object.visibility = this._visibility;
      object.active = this._active;
      object.bounds = this._bounds.map((bound) => ({
        boxInitialized: bound.boxInitialized,
        boxMin: bound.box.min.toArray(),
        boxMax: bound.box.max.toArray(),
        sphereInitialized: bound.sphereInitialized,
        sphereRadius: bound.sphere.radius,
        sphereCenter: bound.sphere.center.toArray()
      }));
      object.maxInstanceCount = this._maxInstanceCount;
      object.maxVertexCount = this._maxVertexCount;
      object.maxIndexCount = this._maxIndexCount;
      object.geometryInitialized = this._geometryInitialized;
      object.geometryCount = this._geometryCount;
      object.matricesTexture = this._matricesTexture.toJSON(meta);
      if (this._colorsTexture !== null) object.colorsTexture = this._colorsTexture.toJSON(meta);
      if (this.boundingSphere !== null) {
        object.boundingSphere = {
          center: object.boundingSphere.center.toArray(),
          radius: object.boundingSphere.radius
        };
      }
      if (this.boundingBox !== null) {
        object.boundingBox = {
          min: object.boundingBox.min.toArray(),
          max: object.boundingBox.max.toArray()
        };
      }
    }
    function serialize(library, element) {
      if (library[element.uuid] === void 0) {
        library[element.uuid] = element.toJSON(meta);
      }
      return element.uuid;
    }
    __name(serialize, "serialize");
    if (this.isScene) {
      if (this.background) {
        if (this.background.isColor) {
          object.background = this.background.toJSON();
        } else if (this.background.isTexture) {
          object.background = this.background.toJSON(meta).uuid;
        }
      }
      if (this.environment && this.environment.isTexture && this.environment.isRenderTargetTexture !== true) {
        object.environment = this.environment.toJSON(meta).uuid;
      }
    } else if (this.isMesh || this.isLine || this.isPoints) {
      object.geometry = serialize(meta.geometries, this.geometry);
      const parameters = this.geometry.parameters;
      if (parameters !== void 0 && parameters.shapes !== void 0) {
        const shapes = parameters.shapes;
        if (Array.isArray(shapes)) {
          for (let i = 0, l = shapes.length; i < l; i++) {
            const shape = shapes[i];
            serialize(meta.shapes, shape);
          }
        } else {
          serialize(meta.shapes, shapes);
        }
      }
    }
    if (this.isSkinnedMesh) {
      object.bindMode = this.bindMode;
      object.bindMatrix = this.bindMatrix.toArray();
      if (this.skeleton !== void 0) {
        serialize(meta.skeletons, this.skeleton);
        object.skeleton = this.skeleton.uuid;
      }
    }
    if (this.material !== void 0) {
      if (Array.isArray(this.material)) {
        const uuids = [];
        for (let i = 0, l = this.material.length; i < l; i++) {
          uuids.push(serialize(meta.materials, this.material[i]));
        }
        object.material = uuids;
      } else {
        object.material = serialize(meta.materials, this.material);
      }
    }
    if (this.children.length > 0) {
      object.children = [];
      for (let i = 0; i < this.children.length; i++) {
        object.children.push(this.children[i].toJSON(meta).object);
      }
    }
    if (this.animations.length > 0) {
      object.animations = [];
      for (let i = 0; i < this.animations.length; i++) {
        const animation = this.animations[i];
        object.animations.push(serialize(meta.animations, animation));
      }
    }
    if (isRootObject) {
      const geometries = extractFromCache(meta.geometries);
      const materials = extractFromCache(meta.materials);
      const textures = extractFromCache(meta.textures);
      const images = extractFromCache(meta.images);
      const shapes = extractFromCache(meta.shapes);
      const skeletons = extractFromCache(meta.skeletons);
      const animations = extractFromCache(meta.animations);
      const nodes = extractFromCache(meta.nodes);
      if (geometries.length > 0) output.geometries = geometries;
      if (materials.length > 0) output.materials = materials;
      if (textures.length > 0) output.textures = textures;
      if (images.length > 0) output.images = images;
      if (shapes.length > 0) output.shapes = shapes;
      if (skeletons.length > 0) output.skeletons = skeletons;
      if (animations.length > 0) output.animations = animations;
      if (nodes.length > 0) output.nodes = nodes;
    }
    output.object = object;
    return output;
    function extractFromCache(cache) {
      const values = [];
      for (const key in cache) {
        const data = cache[key];
        delete data.metadata;
        values.push(data);
      }
      return values;
    }
    __name(extractFromCache, "extractFromCache");
  }
  clone(recursive) {
    return new this.constructor().copy(this, recursive);
  }
  copy(source, recursive = true) {
    this.name = source.name;
    this.up.copy(source.up);
    this.position.copy(source.position);
    this.rotation.order = source.rotation.order;
    this.quaternion.copy(source.quaternion);
    this.scale.copy(source.scale);
    this.matrix.copy(source.matrix);
    this.matrixWorld.copy(source.matrixWorld);
    this.matrixAutoUpdate = source.matrixAutoUpdate;
    this.matrixWorldAutoUpdate = source.matrixWorldAutoUpdate;
    this.matrixWorldNeedsUpdate = source.matrixWorldNeedsUpdate;
    this.layers.mask = source.layers.mask;
    this.visible = source.visible;
    this.castShadow = source.castShadow;
    this.receiveShadow = source.receiveShadow;
    this.frustumCulled = source.frustumCulled;
    this.renderOrder = source.renderOrder;
    this.animations = source.animations.slice();
    this.userData = JSON.parse(JSON.stringify(source.userData));
    if (recursive === true) {
      for (let i = 0; i < source.children.length; i++) {
        const child = source.children[i];
        this.add(child.clone());
      }
    }
    return this;
  }
}
Object3D.DEFAULT_UP = /* @__PURE__ */ new Vector3(0, 1, 0);
Object3D.DEFAULT_MATRIX_AUTO_UPDATE = true;
Object3D.DEFAULT_MATRIX_WORLD_AUTO_UPDATE = true;
const _v0$2 = /* @__PURE__ */ new Vector3();
const _v1$3 = /* @__PURE__ */ new Vector3();
const _v2$2 = /* @__PURE__ */ new Vector3();
const _v3$2 = /* @__PURE__ */ new Vector3();
const _vab = /* @__PURE__ */ new Vector3();
const _vac = /* @__PURE__ */ new Vector3();
const _vbc = /* @__PURE__ */ new Vector3();
const _vap = /* @__PURE__ */ new Vector3();
const _vbp = /* @__PURE__ */ new Vector3();
const _vcp = /* @__PURE__ */ new Vector3();
const _v40 = /* @__PURE__ */ new Vector4();
const _v41 = /* @__PURE__ */ new Vector4();
const _v42 = /* @__PURE__ */ new Vector4();
class Triangle {
  static {
    __name(this, "Triangle");
  }
  constructor(a = new Vector3(), b = new Vector3(), c = new Vector3()) {
    this.a = a;
    this.b = b;
    this.c = c;
  }
  static getNormal(a, b, c, target) {
    target.subVectors(c, b);
    _v0$2.subVectors(a, b);
    target.cross(_v0$2);
    const targetLengthSq = target.lengthSq();
    if (targetLengthSq > 0) {
      return target.multiplyScalar(1 / Math.sqrt(targetLengthSq));
    }
    return target.set(0, 0, 0);
  }
  // static/instance method to calculate barycentric coordinates
  // based on: http://www.blackpawn.com/texts/pointinpoly/default.html
  static getBarycoord(point, a, b, c, target) {
    _v0$2.subVectors(c, a);
    _v1$3.subVectors(b, a);
    _v2$2.subVectors(point, a);
    const dot00 = _v0$2.dot(_v0$2);
    const dot01 = _v0$2.dot(_v1$3);
    const dot02 = _v0$2.dot(_v2$2);
    const dot11 = _v1$3.dot(_v1$3);
    const dot12 = _v1$3.dot(_v2$2);
    const denom = dot00 * dot11 - dot01 * dot01;
    if (denom === 0) {
      target.set(0, 0, 0);
      return null;
    }
    const invDenom = 1 / denom;
    const u = (dot11 * dot02 - dot01 * dot12) * invDenom;
    const v = (dot00 * dot12 - dot01 * dot02) * invDenom;
    return target.set(1 - u - v, v, u);
  }
  static containsPoint(point, a, b, c) {
    if (this.getBarycoord(point, a, b, c, _v3$2) === null) {
      return false;
    }
    return _v3$2.x >= 0 && _v3$2.y >= 0 && _v3$2.x + _v3$2.y <= 1;
  }
  static getInterpolation(point, p1, p2, p3, v1, v2, v3, target) {
    if (this.getBarycoord(point, p1, p2, p3, _v3$2) === null) {
      target.x = 0;
      target.y = 0;
      if ("z" in target) target.z = 0;
      if ("w" in target) target.w = 0;
      return null;
    }
    target.setScalar(0);
    target.addScaledVector(v1, _v3$2.x);
    target.addScaledVector(v2, _v3$2.y);
    target.addScaledVector(v3, _v3$2.z);
    return target;
  }
  static getInterpolatedAttribute(attr, i1, i2, i3, barycoord, target) {
    _v40.setScalar(0);
    _v41.setScalar(0);
    _v42.setScalar(0);
    _v40.fromBufferAttribute(attr, i1);
    _v41.fromBufferAttribute(attr, i2);
    _v42.fromBufferAttribute(attr, i3);
    target.setScalar(0);
    target.addScaledVector(_v40, barycoord.x);
    target.addScaledVector(_v41, barycoord.y);
    target.addScaledVector(_v42, barycoord.z);
    return target;
  }
  static isFrontFacing(a, b, c, direction) {
    _v0$2.subVectors(c, b);
    _v1$3.subVectors(a, b);
    return _v0$2.cross(_v1$3).dot(direction) < 0 ? true : false;
  }
  set(a, b, c) {
    this.a.copy(a);
    this.b.copy(b);
    this.c.copy(c);
    return this;
  }
  setFromPointsAndIndices(points, i0, i1, i2) {
    this.a.copy(points[i0]);
    this.b.copy(points[i1]);
    this.c.copy(points[i2]);
    return this;
  }
  setFromAttributeAndIndices(attribute, i0, i1, i2) {
    this.a.fromBufferAttribute(attribute, i0);
    this.b.fromBufferAttribute(attribute, i1);
    this.c.fromBufferAttribute(attribute, i2);
    return this;
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(triangle) {
    this.a.copy(triangle.a);
    this.b.copy(triangle.b);
    this.c.copy(triangle.c);
    return this;
  }
  getArea() {
    _v0$2.subVectors(this.c, this.b);
    _v1$3.subVectors(this.a, this.b);
    return _v0$2.cross(_v1$3).length() * 0.5;
  }
  getMidpoint(target) {
    return target.addVectors(this.a, this.b).add(this.c).multiplyScalar(1 / 3);
  }
  getNormal(target) {
    return Triangle.getNormal(this.a, this.b, this.c, target);
  }
  getPlane(target) {
    return target.setFromCoplanarPoints(this.a, this.b, this.c);
  }
  getBarycoord(point, target) {
    return Triangle.getBarycoord(point, this.a, this.b, this.c, target);
  }
  getInterpolation(point, v1, v2, v3, target) {
    return Triangle.getInterpolation(point, this.a, this.b, this.c, v1, v2, v3, target);
  }
  containsPoint(point) {
    return Triangle.containsPoint(point, this.a, this.b, this.c);
  }
  isFrontFacing(direction) {
    return Triangle.isFrontFacing(this.a, this.b, this.c, direction);
  }
  intersectsBox(box) {
    return box.intersectsTriangle(this);
  }
  closestPointToPoint(p, target) {
    const a = this.a, b = this.b, c = this.c;
    let v, w;
    _vab.subVectors(b, a);
    _vac.subVectors(c, a);
    _vap.subVectors(p, a);
    const d1 = _vab.dot(_vap);
    const d2 = _vac.dot(_vap);
    if (d1 <= 0 && d2 <= 0) {
      return target.copy(a);
    }
    _vbp.subVectors(p, b);
    const d3 = _vab.dot(_vbp);
    const d4 = _vac.dot(_vbp);
    if (d3 >= 0 && d4 <= d3) {
      return target.copy(b);
    }
    const vc = d1 * d4 - d3 * d2;
    if (vc <= 0 && d1 >= 0 && d3 <= 0) {
      v = d1 / (d1 - d3);
      return target.copy(a).addScaledVector(_vab, v);
    }
    _vcp.subVectors(p, c);
    const d5 = _vab.dot(_vcp);
    const d6 = _vac.dot(_vcp);
    if (d6 >= 0 && d5 <= d6) {
      return target.copy(c);
    }
    const vb = d5 * d2 - d1 * d6;
    if (vb <= 0 && d2 >= 0 && d6 <= 0) {
      w = d2 / (d2 - d6);
      return target.copy(a).addScaledVector(_vac, w);
    }
    const va = d3 * d6 - d5 * d4;
    if (va <= 0 && d4 - d3 >= 0 && d5 - d6 >= 0) {
      _vbc.subVectors(c, b);
      w = (d4 - d3) / (d4 - d3 + (d5 - d6));
      return target.copy(b).addScaledVector(_vbc, w);
    }
    const denom = 1 / (va + vb + vc);
    v = vb * denom;
    w = vc * denom;
    return target.copy(a).addScaledVector(_vab, v).addScaledVector(_vac, w);
  }
  equals(triangle) {
    return triangle.a.equals(this.a) && triangle.b.equals(this.b) && triangle.c.equals(this.c);
  }
}
const _colorKeywords = {
  "aliceblue": 15792383,
  "antiquewhite": 16444375,
  "aqua": 65535,
  "aquamarine": 8388564,
  "azure": 15794175,
  "beige": 16119260,
  "bisque": 16770244,
  "black": 0,
  "blanchedalmond": 16772045,
  "blue": 255,
  "blueviolet": 9055202,
  "brown": 10824234,
  "burlywood": 14596231,
  "cadetblue": 6266528,
  "chartreuse": 8388352,
  "chocolate": 13789470,
  "coral": 16744272,
  "cornflowerblue": 6591981,
  "cornsilk": 16775388,
  "crimson": 14423100,
  "cyan": 65535,
  "darkblue": 139,
  "darkcyan": 35723,
  "darkgoldenrod": 12092939,
  "darkgray": 11119017,
  "darkgreen": 25600,
  "darkgrey": 11119017,
  "darkkhaki": 12433259,
  "darkmagenta": 9109643,
  "darkolivegreen": 5597999,
  "darkorange": 16747520,
  "darkorchid": 10040012,
  "darkred": 9109504,
  "darksalmon": 15308410,
  "darkseagreen": 9419919,
  "darkslateblue": 4734347,
  "darkslategray": 3100495,
  "darkslategrey": 3100495,
  "darkturquoise": 52945,
  "darkviolet": 9699539,
  "deeppink": 16716947,
  "deepskyblue": 49151,
  "dimgray": 6908265,
  "dimgrey": 6908265,
  "dodgerblue": 2003199,
  "firebrick": 11674146,
  "floralwhite": 16775920,
  "forestgreen": 2263842,
  "fuchsia": 16711935,
  "gainsboro": 14474460,
  "ghostwhite": 16316671,
  "gold": 16766720,
  "goldenrod": 14329120,
  "gray": 8421504,
  "green": 32768,
  "greenyellow": 11403055,
  "grey": 8421504,
  "honeydew": 15794160,
  "hotpink": 16738740,
  "indianred": 13458524,
  "indigo": 4915330,
  "ivory": 16777200,
  "khaki": 15787660,
  "lavender": 15132410,
  "lavenderblush": 16773365,
  "lawngreen": 8190976,
  "lemonchiffon": 16775885,
  "lightblue": 11393254,
  "lightcoral": 15761536,
  "lightcyan": 14745599,
  "lightgoldenrodyellow": 16448210,
  "lightgray": 13882323,
  "lightgreen": 9498256,
  "lightgrey": 13882323,
  "lightpink": 16758465,
  "lightsalmon": 16752762,
  "lightseagreen": 2142890,
  "lightskyblue": 8900346,
  "lightslategray": 7833753,
  "lightslategrey": 7833753,
  "lightsteelblue": 11584734,
  "lightyellow": 16777184,
  "lime": 65280,
  "limegreen": 3329330,
  "linen": 16445670,
  "magenta": 16711935,
  "maroon": 8388608,
  "mediumaquamarine": 6737322,
  "mediumblue": 205,
  "mediumorchid": 12211667,
  "mediumpurple": 9662683,
  "mediumseagreen": 3978097,
  "mediumslateblue": 8087790,
  "mediumspringgreen": 64154,
  "mediumturquoise": 4772300,
  "mediumvioletred": 13047173,
  "midnightblue": 1644912,
  "mintcream": 16121850,
  "mistyrose": 16770273,
  "moccasin": 16770229,
  "navajowhite": 16768685,
  "navy": 128,
  "oldlace": 16643558,
  "olive": 8421376,
  "olivedrab": 7048739,
  "orange": 16753920,
  "orangered": 16729344,
  "orchid": 14315734,
  "palegoldenrod": 15657130,
  "palegreen": 10025880,
  "paleturquoise": 11529966,
  "palevioletred": 14381203,
  "papayawhip": 16773077,
  "peachpuff": 16767673,
  "peru": 13468991,
  "pink": 16761035,
  "plum": 14524637,
  "powderblue": 11591910,
  "purple": 8388736,
  "rebeccapurple": 6697881,
  "red": 16711680,
  "rosybrown": 12357519,
  "royalblue": 4286945,
  "saddlebrown": 9127187,
  "salmon": 16416882,
  "sandybrown": 16032864,
  "seagreen": 3050327,
  "seashell": 16774638,
  "sienna": 10506797,
  "silver": 12632256,
  "skyblue": 8900331,
  "slateblue": 6970061,
  "slategray": 7372944,
  "slategrey": 7372944,
  "snow": 16775930,
  "springgreen": 65407,
  "steelblue": 4620980,
  "tan": 13808780,
  "teal": 32896,
  "thistle": 14204888,
  "tomato": 16737095,
  "turquoise": 4251856,
  "violet": 15631086,
  "wheat": 16113331,
  "white": 16777215,
  "whitesmoke": 16119285,
  "yellow": 16776960,
  "yellowgreen": 10145074
};
const _hslA = { h: 0, s: 0, l: 0 };
const _hslB = { h: 0, s: 0, l: 0 };
function hue2rgb(p, q, t) {
  if (t < 0) t += 1;
  if (t > 1) t -= 1;
  if (t < 1 / 6) return p + (q - p) * 6 * t;
  if (t < 1 / 2) return q;
  if (t < 2 / 3) return p + (q - p) * 6 * (2 / 3 - t);
  return p;
}
__name(hue2rgb, "hue2rgb");
class Color {
  static {
    __name(this, "Color");
  }
  constructor(r, g, b) {
    this.isColor = true;
    this.r = 1;
    this.g = 1;
    this.b = 1;
    return this.set(r, g, b);
  }
  set(r, g, b) {
    if (g === void 0 && b === void 0) {
      const value = r;
      if (value && value.isColor) {
        this.copy(value);
      } else if (typeof value === "number") {
        this.setHex(value);
      } else if (typeof value === "string") {
        this.setStyle(value);
      }
    } else {
      this.setRGB(r, g, b);
    }
    return this;
  }
  setScalar(scalar) {
    this.r = scalar;
    this.g = scalar;
    this.b = scalar;
    return this;
  }
  setHex(hex, colorSpace = SRGBColorSpace) {
    hex = Math.floor(hex);
    this.r = (hex >> 16 & 255) / 255;
    this.g = (hex >> 8 & 255) / 255;
    this.b = (hex & 255) / 255;
    ColorManagement.toWorkingColorSpace(this, colorSpace);
    return this;
  }
  setRGB(r, g, b, colorSpace = ColorManagement.workingColorSpace) {
    this.r = r;
    this.g = g;
    this.b = b;
    ColorManagement.toWorkingColorSpace(this, colorSpace);
    return this;
  }
  setHSL(h, s, l, colorSpace = ColorManagement.workingColorSpace) {
    h = euclideanModulo(h, 1);
    s = clamp(s, 0, 1);
    l = clamp(l, 0, 1);
    if (s === 0) {
      this.r = this.g = this.b = l;
    } else {
      const p = l <= 0.5 ? l * (1 + s) : l + s - l * s;
      const q = 2 * l - p;
      this.r = hue2rgb(q, p, h + 1 / 3);
      this.g = hue2rgb(q, p, h);
      this.b = hue2rgb(q, p, h - 1 / 3);
    }
    ColorManagement.toWorkingColorSpace(this, colorSpace);
    return this;
  }
  setStyle(style, colorSpace = SRGBColorSpace) {
    function handleAlpha(string) {
      if (string === void 0) return;
      if (parseFloat(string) < 1) {
        console.warn("THREE.Color: Alpha component of " + style + " will be ignored.");
      }
    }
    __name(handleAlpha, "handleAlpha");
    let m;
    if (m = /^(\w+)\(([^\)]*)\)/.exec(style)) {
      let color;
      const name = m[1];
      const components = m[2];
      switch (name) {
        case "rgb":
        case "rgba":
          if (color = /^\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
            handleAlpha(color[4]);
            return this.setRGB(
              Math.min(255, parseInt(color[1], 10)) / 255,
              Math.min(255, parseInt(color[2], 10)) / 255,
              Math.min(255, parseInt(color[3], 10)) / 255,
              colorSpace
            );
          }
          if (color = /^\s*(\d+)\%\s*,\s*(\d+)\%\s*,\s*(\d+)\%\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
            handleAlpha(color[4]);
            return this.setRGB(
              Math.min(100, parseInt(color[1], 10)) / 100,
              Math.min(100, parseInt(color[2], 10)) / 100,
              Math.min(100, parseInt(color[3], 10)) / 100,
              colorSpace
            );
          }
          break;
        case "hsl":
        case "hsla":
          if (color = /^\s*(\d*\.?\d+)\s*,\s*(\d*\.?\d+)\%\s*,\s*(\d*\.?\d+)\%\s*(?:,\s*(\d*\.?\d+)\s*)?$/.exec(components)) {
            handleAlpha(color[4]);
            return this.setHSL(
              parseFloat(color[1]) / 360,
              parseFloat(color[2]) / 100,
              parseFloat(color[3]) / 100,
              colorSpace
            );
          }
          break;
        default:
          console.warn("THREE.Color: Unknown color model " + style);
      }
    } else if (m = /^\#([A-Fa-f\d]+)$/.exec(style)) {
      const hex = m[1];
      const size = hex.length;
      if (size === 3) {
        return this.setRGB(
          parseInt(hex.charAt(0), 16) / 15,
          parseInt(hex.charAt(1), 16) / 15,
          parseInt(hex.charAt(2), 16) / 15,
          colorSpace
        );
      } else if (size === 6) {
        return this.setHex(parseInt(hex, 16), colorSpace);
      } else {
        console.warn("THREE.Color: Invalid hex color " + style);
      }
    } else if (style && style.length > 0) {
      return this.setColorName(style, colorSpace);
    }
    return this;
  }
  setColorName(style, colorSpace = SRGBColorSpace) {
    const hex = _colorKeywords[style.toLowerCase()];
    if (hex !== void 0) {
      this.setHex(hex, colorSpace);
    } else {
      console.warn("THREE.Color: Unknown color " + style);
    }
    return this;
  }
  clone() {
    return new this.constructor(this.r, this.g, this.b);
  }
  copy(color) {
    this.r = color.r;
    this.g = color.g;
    this.b = color.b;
    return this;
  }
  copySRGBToLinear(color) {
    this.r = SRGBToLinear(color.r);
    this.g = SRGBToLinear(color.g);
    this.b = SRGBToLinear(color.b);
    return this;
  }
  copyLinearToSRGB(color) {
    this.r = LinearToSRGB(color.r);
    this.g = LinearToSRGB(color.g);
    this.b = LinearToSRGB(color.b);
    return this;
  }
  convertSRGBToLinear() {
    this.copySRGBToLinear(this);
    return this;
  }
  convertLinearToSRGB() {
    this.copyLinearToSRGB(this);
    return this;
  }
  getHex(colorSpace = SRGBColorSpace) {
    ColorManagement.fromWorkingColorSpace(_color$2.copy(this), colorSpace);
    return Math.round(clamp(_color$2.r * 255, 0, 255)) * 65536 + Math.round(clamp(_color$2.g * 255, 0, 255)) * 256 + Math.round(clamp(_color$2.b * 255, 0, 255));
  }
  getHexString(colorSpace = SRGBColorSpace) {
    return ("000000" + this.getHex(colorSpace).toString(16)).slice(-6);
  }
  getHSL(target, colorSpace = ColorManagement.workingColorSpace) {
    ColorManagement.fromWorkingColorSpace(_color$2.copy(this), colorSpace);
    const r = _color$2.r, g = _color$2.g, b = _color$2.b;
    const max2 = Math.max(r, g, b);
    const min = Math.min(r, g, b);
    let hue, saturation;
    const lightness = (min + max2) / 2;
    if (min === max2) {
      hue = 0;
      saturation = 0;
    } else {
      const delta = max2 - min;
      saturation = lightness <= 0.5 ? delta / (max2 + min) : delta / (2 - max2 - min);
      switch (max2) {
        case r:
          hue = (g - b) / delta + (g < b ? 6 : 0);
          break;
        case g:
          hue = (b - r) / delta + 2;
          break;
        case b:
          hue = (r - g) / delta + 4;
          break;
      }
      hue /= 6;
    }
    target.h = hue;
    target.s = saturation;
    target.l = lightness;
    return target;
  }
  getRGB(target, colorSpace = ColorManagement.workingColorSpace) {
    ColorManagement.fromWorkingColorSpace(_color$2.copy(this), colorSpace);
    target.r = _color$2.r;
    target.g = _color$2.g;
    target.b = _color$2.b;
    return target;
  }
  getStyle(colorSpace = SRGBColorSpace) {
    ColorManagement.fromWorkingColorSpace(_color$2.copy(this), colorSpace);
    const r = _color$2.r, g = _color$2.g, b = _color$2.b;
    if (colorSpace !== SRGBColorSpace) {
      return `color(${colorSpace} ${r.toFixed(3)} ${g.toFixed(3)} ${b.toFixed(3)})`;
    }
    return `rgb(${Math.round(r * 255)},${Math.round(g * 255)},${Math.round(b * 255)})`;
  }
  offsetHSL(h, s, l) {
    this.getHSL(_hslA);
    return this.setHSL(_hslA.h + h, _hslA.s + s, _hslA.l + l);
  }
  add(color) {
    this.r += color.r;
    this.g += color.g;
    this.b += color.b;
    return this;
  }
  addColors(color1, color2) {
    this.r = color1.r + color2.r;
    this.g = color1.g + color2.g;
    this.b = color1.b + color2.b;
    return this;
  }
  addScalar(s) {
    this.r += s;
    this.g += s;
    this.b += s;
    return this;
  }
  sub(color) {
    this.r = Math.max(0, this.r - color.r);
    this.g = Math.max(0, this.g - color.g);
    this.b = Math.max(0, this.b - color.b);
    return this;
  }
  multiply(color) {
    this.r *= color.r;
    this.g *= color.g;
    this.b *= color.b;
    return this;
  }
  multiplyScalar(s) {
    this.r *= s;
    this.g *= s;
    this.b *= s;
    return this;
  }
  lerp(color, alpha) {
    this.r += (color.r - this.r) * alpha;
    this.g += (color.g - this.g) * alpha;
    this.b += (color.b - this.b) * alpha;
    return this;
  }
  lerpColors(color1, color2, alpha) {
    this.r = color1.r + (color2.r - color1.r) * alpha;
    this.g = color1.g + (color2.g - color1.g) * alpha;
    this.b = color1.b + (color2.b - color1.b) * alpha;
    return this;
  }
  lerpHSL(color, alpha) {
    this.getHSL(_hslA);
    color.getHSL(_hslB);
    const h = lerp(_hslA.h, _hslB.h, alpha);
    const s = lerp(_hslA.s, _hslB.s, alpha);
    const l = lerp(_hslA.l, _hslB.l, alpha);
    this.setHSL(h, s, l);
    return this;
  }
  setFromVector3(v) {
    this.r = v.x;
    this.g = v.y;
    this.b = v.z;
    return this;
  }
  applyMatrix3(m) {
    const r = this.r, g = this.g, b = this.b;
    const e = m.elements;
    this.r = e[0] * r + e[3] * g + e[6] * b;
    this.g = e[1] * r + e[4] * g + e[7] * b;
    this.b = e[2] * r + e[5] * g + e[8] * b;
    return this;
  }
  equals(c) {
    return c.r === this.r && c.g === this.g && c.b === this.b;
  }
  fromArray(array, offset = 0) {
    this.r = array[offset];
    this.g = array[offset + 1];
    this.b = array[offset + 2];
    return this;
  }
  toArray(array = [], offset = 0) {
    array[offset] = this.r;
    array[offset + 1] = this.g;
    array[offset + 2] = this.b;
    return array;
  }
  fromBufferAttribute(attribute, index) {
    this.r = attribute.getX(index);
    this.g = attribute.getY(index);
    this.b = attribute.getZ(index);
    return this;
  }
  toJSON() {
    return this.getHex();
  }
  *[Symbol.iterator]() {
    yield this.r;
    yield this.g;
    yield this.b;
  }
}
const _color$2 = /* @__PURE__ */ new Color();
Color.NAMES = _colorKeywords;
let _materialId = 0;
class Material extends EventDispatcher {
  static {
    __name(this, "Material");
  }
  static get type() {
    return "Material";
  }
  get type() {
    return this.constructor.type;
  }
  set type(_value) {
  }
  constructor() {
    super();
    this.isMaterial = true;
    Object.defineProperty(this, "id", { value: _materialId++ });
    this.uuid = generateUUID();
    this.name = "";
    this.blending = NormalBlending;
    this.side = FrontSide;
    this.vertexColors = false;
    this.opacity = 1;
    this.transparent = false;
    this.alphaHash = false;
    this.blendSrc = SrcAlphaFactor;
    this.blendDst = OneMinusSrcAlphaFactor;
    this.blendEquation = AddEquation;
    this.blendSrcAlpha = null;
    this.blendDstAlpha = null;
    this.blendEquationAlpha = null;
    this.blendColor = new Color(0, 0, 0);
    this.blendAlpha = 0;
    this.depthFunc = LessEqualDepth;
    this.depthTest = true;
    this.depthWrite = true;
    this.stencilWriteMask = 255;
    this.stencilFunc = AlwaysStencilFunc;
    this.stencilRef = 0;
    this.stencilFuncMask = 255;
    this.stencilFail = KeepStencilOp;
    this.stencilZFail = KeepStencilOp;
    this.stencilZPass = KeepStencilOp;
    this.stencilWrite = false;
    this.clippingPlanes = null;
    this.clipIntersection = false;
    this.clipShadows = false;
    this.shadowSide = null;
    this.colorWrite = true;
    this.precision = null;
    this.polygonOffset = false;
    this.polygonOffsetFactor = 0;
    this.polygonOffsetUnits = 0;
    this.dithering = false;
    this.alphaToCoverage = false;
    this.premultipliedAlpha = false;
    this.forceSinglePass = false;
    this.visible = true;
    this.toneMapped = true;
    this.userData = {};
    this.version = 0;
    this._alphaTest = 0;
  }
  get alphaTest() {
    return this._alphaTest;
  }
  set alphaTest(value) {
    if (this._alphaTest > 0 !== value > 0) {
      this.version++;
    }
    this._alphaTest = value;
  }
  // onBeforeRender and onBeforeCompile only supported in WebGLRenderer
  onBeforeRender() {
  }
  onBeforeCompile() {
  }
  customProgramCacheKey() {
    return this.onBeforeCompile.toString();
  }
  setValues(values) {
    if (values === void 0) return;
    for (const key in values) {
      const newValue = values[key];
      if (newValue === void 0) {
        console.warn(`THREE.Material: parameter '${key}' has value of undefined.`);
        continue;
      }
      const currentValue = this[key];
      if (currentValue === void 0) {
        console.warn(`THREE.Material: '${key}' is not a property of THREE.${this.type}.`);
        continue;
      }
      if (currentValue && currentValue.isColor) {
        currentValue.set(newValue);
      } else if (currentValue && currentValue.isVector3 && (newValue && newValue.isVector3)) {
        currentValue.copy(newValue);
      } else {
        this[key] = newValue;
      }
    }
  }
  toJSON(meta) {
    const isRootObject = meta === void 0 || typeof meta === "string";
    if (isRootObject) {
      meta = {
        textures: {},
        images: {}
      };
    }
    const data = {
      metadata: {
        version: 4.6,
        type: "Material",
        generator: "Material.toJSON"
      }
    };
    data.uuid = this.uuid;
    data.type = this.type;
    if (this.name !== "") data.name = this.name;
    if (this.color && this.color.isColor) data.color = this.color.getHex();
    if (this.roughness !== void 0) data.roughness = this.roughness;
    if (this.metalness !== void 0) data.metalness = this.metalness;
    if (this.sheen !== void 0) data.sheen = this.sheen;
    if (this.sheenColor && this.sheenColor.isColor) data.sheenColor = this.sheenColor.getHex();
    if (this.sheenRoughness !== void 0) data.sheenRoughness = this.sheenRoughness;
    if (this.emissive && this.emissive.isColor) data.emissive = this.emissive.getHex();
    if (this.emissiveIntensity !== void 0 && this.emissiveIntensity !== 1) data.emissiveIntensity = this.emissiveIntensity;
    if (this.specular && this.specular.isColor) data.specular = this.specular.getHex();
    if (this.specularIntensity !== void 0) data.specularIntensity = this.specularIntensity;
    if (this.specularColor && this.specularColor.isColor) data.specularColor = this.specularColor.getHex();
    if (this.shininess !== void 0) data.shininess = this.shininess;
    if (this.clearcoat !== void 0) data.clearcoat = this.clearcoat;
    if (this.clearcoatRoughness !== void 0) data.clearcoatRoughness = this.clearcoatRoughness;
    if (this.clearcoatMap && this.clearcoatMap.isTexture) {
      data.clearcoatMap = this.clearcoatMap.toJSON(meta).uuid;
    }
    if (this.clearcoatRoughnessMap && this.clearcoatRoughnessMap.isTexture) {
      data.clearcoatRoughnessMap = this.clearcoatRoughnessMap.toJSON(meta).uuid;
    }
    if (this.clearcoatNormalMap && this.clearcoatNormalMap.isTexture) {
      data.clearcoatNormalMap = this.clearcoatNormalMap.toJSON(meta).uuid;
      data.clearcoatNormalScale = this.clearcoatNormalScale.toArray();
    }
    if (this.dispersion !== void 0) data.dispersion = this.dispersion;
    if (this.iridescence !== void 0) data.iridescence = this.iridescence;
    if (this.iridescenceIOR !== void 0) data.iridescenceIOR = this.iridescenceIOR;
    if (this.iridescenceThicknessRange !== void 0) data.iridescenceThicknessRange = this.iridescenceThicknessRange;
    if (this.iridescenceMap && this.iridescenceMap.isTexture) {
      data.iridescenceMap = this.iridescenceMap.toJSON(meta).uuid;
    }
    if (this.iridescenceThicknessMap && this.iridescenceThicknessMap.isTexture) {
      data.iridescenceThicknessMap = this.iridescenceThicknessMap.toJSON(meta).uuid;
    }
    if (this.anisotropy !== void 0) data.anisotropy = this.anisotropy;
    if (this.anisotropyRotation !== void 0) data.anisotropyRotation = this.anisotropyRotation;
    if (this.anisotropyMap && this.anisotropyMap.isTexture) {
      data.anisotropyMap = this.anisotropyMap.toJSON(meta).uuid;
    }
    if (this.map && this.map.isTexture) data.map = this.map.toJSON(meta).uuid;
    if (this.matcap && this.matcap.isTexture) data.matcap = this.matcap.toJSON(meta).uuid;
    if (this.alphaMap && this.alphaMap.isTexture) data.alphaMap = this.alphaMap.toJSON(meta).uuid;
    if (this.lightMap && this.lightMap.isTexture) {
      data.lightMap = this.lightMap.toJSON(meta).uuid;
      data.lightMapIntensity = this.lightMapIntensity;
    }
    if (this.aoMap && this.aoMap.isTexture) {
      data.aoMap = this.aoMap.toJSON(meta).uuid;
      data.aoMapIntensity = this.aoMapIntensity;
    }
    if (this.bumpMap && this.bumpMap.isTexture) {
      data.bumpMap = this.bumpMap.toJSON(meta).uuid;
      data.bumpScale = this.bumpScale;
    }
    if (this.normalMap && this.normalMap.isTexture) {
      data.normalMap = this.normalMap.toJSON(meta).uuid;
      data.normalMapType = this.normalMapType;
      data.normalScale = this.normalScale.toArray();
    }
    if (this.displacementMap && this.displacementMap.isTexture) {
      data.displacementMap = this.displacementMap.toJSON(meta).uuid;
      data.displacementScale = this.displacementScale;
      data.displacementBias = this.displacementBias;
    }
    if (this.roughnessMap && this.roughnessMap.isTexture) data.roughnessMap = this.roughnessMap.toJSON(meta).uuid;
    if (this.metalnessMap && this.metalnessMap.isTexture) data.metalnessMap = this.metalnessMap.toJSON(meta).uuid;
    if (this.emissiveMap && this.emissiveMap.isTexture) data.emissiveMap = this.emissiveMap.toJSON(meta).uuid;
    if (this.specularMap && this.specularMap.isTexture) data.specularMap = this.specularMap.toJSON(meta).uuid;
    if (this.specularIntensityMap && this.specularIntensityMap.isTexture) data.specularIntensityMap = this.specularIntensityMap.toJSON(meta).uuid;
    if (this.specularColorMap && this.specularColorMap.isTexture) data.specularColorMap = this.specularColorMap.toJSON(meta).uuid;
    if (this.envMap && this.envMap.isTexture) {
      data.envMap = this.envMap.toJSON(meta).uuid;
      if (this.combine !== void 0) data.combine = this.combine;
    }
    if (this.envMapRotation !== void 0) data.envMapRotation = this.envMapRotation.toArray();
    if (this.envMapIntensity !== void 0) data.envMapIntensity = this.envMapIntensity;
    if (this.reflectivity !== void 0) data.reflectivity = this.reflectivity;
    if (this.refractionRatio !== void 0) data.refractionRatio = this.refractionRatio;
    if (this.gradientMap && this.gradientMap.isTexture) {
      data.gradientMap = this.gradientMap.toJSON(meta).uuid;
    }
    if (this.transmission !== void 0) data.transmission = this.transmission;
    if (this.transmissionMap && this.transmissionMap.isTexture) data.transmissionMap = this.transmissionMap.toJSON(meta).uuid;
    if (this.thickness !== void 0) data.thickness = this.thickness;
    if (this.thicknessMap && this.thicknessMap.isTexture) data.thicknessMap = this.thicknessMap.toJSON(meta).uuid;
    if (this.attenuationDistance !== void 0 && this.attenuationDistance !== Infinity) data.attenuationDistance = this.attenuationDistance;
    if (this.attenuationColor !== void 0) data.attenuationColor = this.attenuationColor.getHex();
    if (this.size !== void 0) data.size = this.size;
    if (this.shadowSide !== null) data.shadowSide = this.shadowSide;
    if (this.sizeAttenuation !== void 0) data.sizeAttenuation = this.sizeAttenuation;
    if (this.blending !== NormalBlending) data.blending = this.blending;
    if (this.side !== FrontSide) data.side = this.side;
    if (this.vertexColors === true) data.vertexColors = true;
    if (this.opacity < 1) data.opacity = this.opacity;
    if (this.transparent === true) data.transparent = true;
    if (this.blendSrc !== SrcAlphaFactor) data.blendSrc = this.blendSrc;
    if (this.blendDst !== OneMinusSrcAlphaFactor) data.blendDst = this.blendDst;
    if (this.blendEquation !== AddEquation) data.blendEquation = this.blendEquation;
    if (this.blendSrcAlpha !== null) data.blendSrcAlpha = this.blendSrcAlpha;
    if (this.blendDstAlpha !== null) data.blendDstAlpha = this.blendDstAlpha;
    if (this.blendEquationAlpha !== null) data.blendEquationAlpha = this.blendEquationAlpha;
    if (this.blendColor && this.blendColor.isColor) data.blendColor = this.blendColor.getHex();
    if (this.blendAlpha !== 0) data.blendAlpha = this.blendAlpha;
    if (this.depthFunc !== LessEqualDepth) data.depthFunc = this.depthFunc;
    if (this.depthTest === false) data.depthTest = this.depthTest;
    if (this.depthWrite === false) data.depthWrite = this.depthWrite;
    if (this.colorWrite === false) data.colorWrite = this.colorWrite;
    if (this.stencilWriteMask !== 255) data.stencilWriteMask = this.stencilWriteMask;
    if (this.stencilFunc !== AlwaysStencilFunc) data.stencilFunc = this.stencilFunc;
    if (this.stencilRef !== 0) data.stencilRef = this.stencilRef;
    if (this.stencilFuncMask !== 255) data.stencilFuncMask = this.stencilFuncMask;
    if (this.stencilFail !== KeepStencilOp) data.stencilFail = this.stencilFail;
    if (this.stencilZFail !== KeepStencilOp) data.stencilZFail = this.stencilZFail;
    if (this.stencilZPass !== KeepStencilOp) data.stencilZPass = this.stencilZPass;
    if (this.stencilWrite === true) data.stencilWrite = this.stencilWrite;
    if (this.rotation !== void 0 && this.rotation !== 0) data.rotation = this.rotation;
    if (this.polygonOffset === true) data.polygonOffset = true;
    if (this.polygonOffsetFactor !== 0) data.polygonOffsetFactor = this.polygonOffsetFactor;
    if (this.polygonOffsetUnits !== 0) data.polygonOffsetUnits = this.polygonOffsetUnits;
    if (this.linewidth !== void 0 && this.linewidth !== 1) data.linewidth = this.linewidth;
    if (this.dashSize !== void 0) data.dashSize = this.dashSize;
    if (this.gapSize !== void 0) data.gapSize = this.gapSize;
    if (this.scale !== void 0) data.scale = this.scale;
    if (this.dithering === true) data.dithering = true;
    if (this.alphaTest > 0) data.alphaTest = this.alphaTest;
    if (this.alphaHash === true) data.alphaHash = true;
    if (this.alphaToCoverage === true) data.alphaToCoverage = true;
    if (this.premultipliedAlpha === true) data.premultipliedAlpha = true;
    if (this.forceSinglePass === true) data.forceSinglePass = true;
    if (this.wireframe === true) data.wireframe = true;
    if (this.wireframeLinewidth > 1) data.wireframeLinewidth = this.wireframeLinewidth;
    if (this.wireframeLinecap !== "round") data.wireframeLinecap = this.wireframeLinecap;
    if (this.wireframeLinejoin !== "round") data.wireframeLinejoin = this.wireframeLinejoin;
    if (this.flatShading === true) data.flatShading = true;
    if (this.visible === false) data.visible = false;
    if (this.toneMapped === false) data.toneMapped = false;
    if (this.fog === false) data.fog = false;
    if (Object.keys(this.userData).length > 0) data.userData = this.userData;
    function extractFromCache(cache) {
      const values = [];
      for (const key in cache) {
        const data2 = cache[key];
        delete data2.metadata;
        values.push(data2);
      }
      return values;
    }
    __name(extractFromCache, "extractFromCache");
    if (isRootObject) {
      const textures = extractFromCache(meta.textures);
      const images = extractFromCache(meta.images);
      if (textures.length > 0) data.textures = textures;
      if (images.length > 0) data.images = images;
    }
    return data;
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(source) {
    this.name = source.name;
    this.blending = source.blending;
    this.side = source.side;
    this.vertexColors = source.vertexColors;
    this.opacity = source.opacity;
    this.transparent = source.transparent;
    this.blendSrc = source.blendSrc;
    this.blendDst = source.blendDst;
    this.blendEquation = source.blendEquation;
    this.blendSrcAlpha = source.blendSrcAlpha;
    this.blendDstAlpha = source.blendDstAlpha;
    this.blendEquationAlpha = source.blendEquationAlpha;
    this.blendColor.copy(source.blendColor);
    this.blendAlpha = source.blendAlpha;
    this.depthFunc = source.depthFunc;
    this.depthTest = source.depthTest;
    this.depthWrite = source.depthWrite;
    this.stencilWriteMask = source.stencilWriteMask;
    this.stencilFunc = source.stencilFunc;
    this.stencilRef = source.stencilRef;
    this.stencilFuncMask = source.stencilFuncMask;
    this.stencilFail = source.stencilFail;
    this.stencilZFail = source.stencilZFail;
    this.stencilZPass = source.stencilZPass;
    this.stencilWrite = source.stencilWrite;
    const srcPlanes = source.clippingPlanes;
    let dstPlanes = null;
    if (srcPlanes !== null) {
      const n = srcPlanes.length;
      dstPlanes = new Array(n);
      for (let i = 0; i !== n; ++i) {
        dstPlanes[i] = srcPlanes[i].clone();
      }
    }
    this.clippingPlanes = dstPlanes;
    this.clipIntersection = source.clipIntersection;
    this.clipShadows = source.clipShadows;
    this.shadowSide = source.shadowSide;
    this.colorWrite = source.colorWrite;
    this.precision = source.precision;
    this.polygonOffset = source.polygonOffset;
    this.polygonOffsetFactor = source.polygonOffsetFactor;
    this.polygonOffsetUnits = source.polygonOffsetUnits;
    this.dithering = source.dithering;
    this.alphaTest = source.alphaTest;
    this.alphaHash = source.alphaHash;
    this.alphaToCoverage = source.alphaToCoverage;
    this.premultipliedAlpha = source.premultipliedAlpha;
    this.forceSinglePass = source.forceSinglePass;
    this.visible = source.visible;
    this.toneMapped = source.toneMapped;
    this.userData = JSON.parse(JSON.stringify(source.userData));
    return this;
  }
  dispose() {
    this.dispatchEvent({ type: "dispose" });
  }
  set needsUpdate(value) {
    if (value === true) this.version++;
  }
  onBuild() {
    console.warn("Material: onBuild() has been removed.");
  }
}
class MeshBasicMaterial extends Material {
  static {
    __name(this, "MeshBasicMaterial");
  }
  static get type() {
    return "MeshBasicMaterial";
  }
  constructor(parameters) {
    super();
    this.isMeshBasicMaterial = true;
    this.color = new Color(16777215);
    this.map = null;
    this.lightMap = null;
    this.lightMapIntensity = 1;
    this.aoMap = null;
    this.aoMapIntensity = 1;
    this.specularMap = null;
    this.alphaMap = null;
    this.envMap = null;
    this.envMapRotation = new Euler();
    this.combine = MultiplyOperation;
    this.reflectivity = 1;
    this.refractionRatio = 0.98;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.wireframeLinecap = "round";
    this.wireframeLinejoin = "round";
    this.fog = true;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.map = source.map;
    this.lightMap = source.lightMap;
    this.lightMapIntensity = source.lightMapIntensity;
    this.aoMap = source.aoMap;
    this.aoMapIntensity = source.aoMapIntensity;
    this.specularMap = source.specularMap;
    this.alphaMap = source.alphaMap;
    this.envMap = source.envMap;
    this.envMapRotation.copy(source.envMapRotation);
    this.combine = source.combine;
    this.reflectivity = source.reflectivity;
    this.refractionRatio = source.refractionRatio;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.wireframeLinecap = source.wireframeLinecap;
    this.wireframeLinejoin = source.wireframeLinejoin;
    this.fog = source.fog;
    return this;
  }
}
const _vector$9 = /* @__PURE__ */ new Vector3();
const _vector2$1 = /* @__PURE__ */ new Vector2();
class BufferAttribute {
  static {
    __name(this, "BufferAttribute");
  }
  constructor(array, itemSize, normalized = false) {
    if (Array.isArray(array)) {
      throw new TypeError("THREE.BufferAttribute: array should be a Typed Array.");
    }
    this.isBufferAttribute = true;
    this.name = "";
    this.array = array;
    this.itemSize = itemSize;
    this.count = array !== void 0 ? array.length / itemSize : 0;
    this.normalized = normalized;
    this.usage = StaticDrawUsage;
    this.updateRanges = [];
    this.gpuType = FloatType;
    this.version = 0;
  }
  onUploadCallback() {
  }
  set needsUpdate(value) {
    if (value === true) this.version++;
  }
  setUsage(value) {
    this.usage = value;
    return this;
  }
  addUpdateRange(start, count) {
    this.updateRanges.push({ start, count });
  }
  clearUpdateRanges() {
    this.updateRanges.length = 0;
  }
  copy(source) {
    this.name = source.name;
    this.array = new source.array.constructor(source.array);
    this.itemSize = source.itemSize;
    this.count = source.count;
    this.normalized = source.normalized;
    this.usage = source.usage;
    this.gpuType = source.gpuType;
    return this;
  }
  copyAt(index1, attribute, index2) {
    index1 *= this.itemSize;
    index2 *= attribute.itemSize;
    for (let i = 0, l = this.itemSize; i < l; i++) {
      this.array[index1 + i] = attribute.array[index2 + i];
    }
    return this;
  }
  copyArray(array) {
    this.array.set(array);
    return this;
  }
  applyMatrix3(m) {
    if (this.itemSize === 2) {
      for (let i = 0, l = this.count; i < l; i++) {
        _vector2$1.fromBufferAttribute(this, i);
        _vector2$1.applyMatrix3(m);
        this.setXY(i, _vector2$1.x, _vector2$1.y);
      }
    } else if (this.itemSize === 3) {
      for (let i = 0, l = this.count; i < l; i++) {
        _vector$9.fromBufferAttribute(this, i);
        _vector$9.applyMatrix3(m);
        this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
      }
    }
    return this;
  }
  applyMatrix4(m) {
    for (let i = 0, l = this.count; i < l; i++) {
      _vector$9.fromBufferAttribute(this, i);
      _vector$9.applyMatrix4(m);
      this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
    }
    return this;
  }
  applyNormalMatrix(m) {
    for (let i = 0, l = this.count; i < l; i++) {
      _vector$9.fromBufferAttribute(this, i);
      _vector$9.applyNormalMatrix(m);
      this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
    }
    return this;
  }
  transformDirection(m) {
    for (let i = 0, l = this.count; i < l; i++) {
      _vector$9.fromBufferAttribute(this, i);
      _vector$9.transformDirection(m);
      this.setXYZ(i, _vector$9.x, _vector$9.y, _vector$9.z);
    }
    return this;
  }
  set(value, offset = 0) {
    this.array.set(value, offset);
    return this;
  }
  getComponent(index, component) {
    let value = this.array[index * this.itemSize + component];
    if (this.normalized) value = denormalize(value, this.array);
    return value;
  }
  setComponent(index, component, value) {
    if (this.normalized) value = normalize$1(value, this.array);
    this.array[index * this.itemSize + component] = value;
    return this;
  }
  getX(index) {
    let x = this.array[index * this.itemSize];
    if (this.normalized) x = denormalize(x, this.array);
    return x;
  }
  setX(index, x) {
    if (this.normalized) x = normalize$1(x, this.array);
    this.array[index * this.itemSize] = x;
    return this;
  }
  getY(index) {
    let y = this.array[index * this.itemSize + 1];
    if (this.normalized) y = denormalize(y, this.array);
    return y;
  }
  setY(index, y) {
    if (this.normalized) y = normalize$1(y, this.array);
    this.array[index * this.itemSize + 1] = y;
    return this;
  }
  getZ(index) {
    let z = this.array[index * this.itemSize + 2];
    if (this.normalized) z = denormalize(z, this.array);
    return z;
  }
  setZ(index, z) {
    if (this.normalized) z = normalize$1(z, this.array);
    this.array[index * this.itemSize + 2] = z;
    return this;
  }
  getW(index) {
    let w = this.array[index * this.itemSize + 3];
    if (this.normalized) w = denormalize(w, this.array);
    return w;
  }
  setW(index, w) {
    if (this.normalized) w = normalize$1(w, this.array);
    this.array[index * this.itemSize + 3] = w;
    return this;
  }
  setXY(index, x, y) {
    index *= this.itemSize;
    if (this.normalized) {
      x = normalize$1(x, this.array);
      y = normalize$1(y, this.array);
    }
    this.array[index + 0] = x;
    this.array[index + 1] = y;
    return this;
  }
  setXYZ(index, x, y, z) {
    index *= this.itemSize;
    if (this.normalized) {
      x = normalize$1(x, this.array);
      y = normalize$1(y, this.array);
      z = normalize$1(z, this.array);
    }
    this.array[index + 0] = x;
    this.array[index + 1] = y;
    this.array[index + 2] = z;
    return this;
  }
  setXYZW(index, x, y, z, w) {
    index *= this.itemSize;
    if (this.normalized) {
      x = normalize$1(x, this.array);
      y = normalize$1(y, this.array);
      z = normalize$1(z, this.array);
      w = normalize$1(w, this.array);
    }
    this.array[index + 0] = x;
    this.array[index + 1] = y;
    this.array[index + 2] = z;
    this.array[index + 3] = w;
    return this;
  }
  onUpload(callback) {
    this.onUploadCallback = callback;
    return this;
  }
  clone() {
    return new this.constructor(this.array, this.itemSize).copy(this);
  }
  toJSON() {
    const data = {
      itemSize: this.itemSize,
      type: this.array.constructor.name,
      array: Array.from(this.array),
      normalized: this.normalized
    };
    if (this.name !== "") data.name = this.name;
    if (this.usage !== StaticDrawUsage) data.usage = this.usage;
    return data;
  }
}
class Uint16BufferAttribute extends BufferAttribute {
  static {
    __name(this, "Uint16BufferAttribute");
  }
  constructor(array, itemSize, normalized) {
    super(new Uint16Array(array), itemSize, normalized);
  }
}
class Uint32BufferAttribute extends BufferAttribute {
  static {
    __name(this, "Uint32BufferAttribute");
  }
  constructor(array, itemSize, normalized) {
    super(new Uint32Array(array), itemSize, normalized);
  }
}
class Float32BufferAttribute extends BufferAttribute {
  static {
    __name(this, "Float32BufferAttribute");
  }
  constructor(array, itemSize, normalized) {
    super(new Float32Array(array), itemSize, normalized);
  }
}
let _id$2 = 0;
const _m1$2 = /* @__PURE__ */ new Matrix4();
const _obj = /* @__PURE__ */ new Object3D();
const _offset = /* @__PURE__ */ new Vector3();
const _box$2 = /* @__PURE__ */ new Box3();
const _boxMorphTargets = /* @__PURE__ */ new Box3();
const _vector$8 = /* @__PURE__ */ new Vector3();
class BufferGeometry extends EventDispatcher {
  static {
    __name(this, "BufferGeometry");
  }
  constructor() {
    super();
    this.isBufferGeometry = true;
    Object.defineProperty(this, "id", { value: _id$2++ });
    this.uuid = generateUUID();
    this.name = "";
    this.type = "BufferGeometry";
    this.index = null;
    this.indirect = null;
    this.attributes = {};
    this.morphAttributes = {};
    this.morphTargetsRelative = false;
    this.groups = [];
    this.boundingBox = null;
    this.boundingSphere = null;
    this.drawRange = { start: 0, count: Infinity };
    this.userData = {};
  }
  getIndex() {
    return this.index;
  }
  setIndex(index) {
    if (Array.isArray(index)) {
      this.index = new (arrayNeedsUint32(index) ? Uint32BufferAttribute : Uint16BufferAttribute)(index, 1);
    } else {
      this.index = index;
    }
    return this;
  }
  setIndirect(indirect) {
    this.indirect = indirect;
    return this;
  }
  getIndirect() {
    return this.indirect;
  }
  getAttribute(name) {
    return this.attributes[name];
  }
  setAttribute(name, attribute) {
    this.attributes[name] = attribute;
    return this;
  }
  deleteAttribute(name) {
    delete this.attributes[name];
    return this;
  }
  hasAttribute(name) {
    return this.attributes[name] !== void 0;
  }
  addGroup(start, count, materialIndex = 0) {
    this.groups.push({
      start,
      count,
      materialIndex
    });
  }
  clearGroups() {
    this.groups = [];
  }
  setDrawRange(start, count) {
    this.drawRange.start = start;
    this.drawRange.count = count;
  }
  applyMatrix4(matrix) {
    const position = this.attributes.position;
    if (position !== void 0) {
      position.applyMatrix4(matrix);
      position.needsUpdate = true;
    }
    const normal = this.attributes.normal;
    if (normal !== void 0) {
      const normalMatrix = new Matrix3().getNormalMatrix(matrix);
      normal.applyNormalMatrix(normalMatrix);
      normal.needsUpdate = true;
    }
    const tangent = this.attributes.tangent;
    if (tangent !== void 0) {
      tangent.transformDirection(matrix);
      tangent.needsUpdate = true;
    }
    if (this.boundingBox !== null) {
      this.computeBoundingBox();
    }
    if (this.boundingSphere !== null) {
      this.computeBoundingSphere();
    }
    return this;
  }
  applyQuaternion(q) {
    _m1$2.makeRotationFromQuaternion(q);
    this.applyMatrix4(_m1$2);
    return this;
  }
  rotateX(angle) {
    _m1$2.makeRotationX(angle);
    this.applyMatrix4(_m1$2);
    return this;
  }
  rotateY(angle) {
    _m1$2.makeRotationY(angle);
    this.applyMatrix4(_m1$2);
    return this;
  }
  rotateZ(angle) {
    _m1$2.makeRotationZ(angle);
    this.applyMatrix4(_m1$2);
    return this;
  }
  translate(x, y, z) {
    _m1$2.makeTranslation(x, y, z);
    this.applyMatrix4(_m1$2);
    return this;
  }
  scale(x, y, z) {
    _m1$2.makeScale(x, y, z);
    this.applyMatrix4(_m1$2);
    return this;
  }
  lookAt(vector) {
    _obj.lookAt(vector);
    _obj.updateMatrix();
    this.applyMatrix4(_obj.matrix);
    return this;
  }
  center() {
    this.computeBoundingBox();
    this.boundingBox.getCenter(_offset).negate();
    this.translate(_offset.x, _offset.y, _offset.z);
    return this;
  }
  setFromPoints(points) {
    const positionAttribute = this.getAttribute("position");
    if (positionAttribute === void 0) {
      const position = [];
      for (let i = 0, l = points.length; i < l; i++) {
        const point = points[i];
        position.push(point.x, point.y, point.z || 0);
      }
      this.setAttribute("position", new Float32BufferAttribute(position, 3));
    } else {
      for (let i = 0, l = positionAttribute.count; i < l; i++) {
        const point = points[i];
        positionAttribute.setXYZ(i, point.x, point.y, point.z || 0);
      }
      if (points.length > positionAttribute.count) {
        console.warn("THREE.BufferGeometry: Buffer size too small for points data. Use .dispose() and create a new geometry.");
      }
      positionAttribute.needsUpdate = true;
    }
    return this;
  }
  computeBoundingBox() {
    if (this.boundingBox === null) {
      this.boundingBox = new Box3();
    }
    const position = this.attributes.position;
    const morphAttributesPosition = this.morphAttributes.position;
    if (position && position.isGLBufferAttribute) {
      console.error("THREE.BufferGeometry.computeBoundingBox(): GLBufferAttribute requires a manual bounding box.", this);
      this.boundingBox.set(
        new Vector3(-Infinity, -Infinity, -Infinity),
        new Vector3(Infinity, Infinity, Infinity)
      );
      return;
    }
    if (position !== void 0) {
      this.boundingBox.setFromBufferAttribute(position);
      if (morphAttributesPosition) {
        for (let i = 0, il = morphAttributesPosition.length; i < il; i++) {
          const morphAttribute = morphAttributesPosition[i];
          _box$2.setFromBufferAttribute(morphAttribute);
          if (this.morphTargetsRelative) {
            _vector$8.addVectors(this.boundingBox.min, _box$2.min);
            this.boundingBox.expandByPoint(_vector$8);
            _vector$8.addVectors(this.boundingBox.max, _box$2.max);
            this.boundingBox.expandByPoint(_vector$8);
          } else {
            this.boundingBox.expandByPoint(_box$2.min);
            this.boundingBox.expandByPoint(_box$2.max);
          }
        }
      }
    } else {
      this.boundingBox.makeEmpty();
    }
    if (isNaN(this.boundingBox.min.x) || isNaN(this.boundingBox.min.y) || isNaN(this.boundingBox.min.z)) {
      console.error('THREE.BufferGeometry.computeBoundingBox(): Computed min/max have NaN values. The "position" attribute is likely to have NaN values.', this);
    }
  }
  computeBoundingSphere() {
    if (this.boundingSphere === null) {
      this.boundingSphere = new Sphere();
    }
    const position = this.attributes.position;
    const morphAttributesPosition = this.morphAttributes.position;
    if (position && position.isGLBufferAttribute) {
      console.error("THREE.BufferGeometry.computeBoundingSphere(): GLBufferAttribute requires a manual bounding sphere.", this);
      this.boundingSphere.set(new Vector3(), Infinity);
      return;
    }
    if (position) {
      const center = this.boundingSphere.center;
      _box$2.setFromBufferAttribute(position);
      if (morphAttributesPosition) {
        for (let i = 0, il = morphAttributesPosition.length; i < il; i++) {
          const morphAttribute = morphAttributesPosition[i];
          _boxMorphTargets.setFromBufferAttribute(morphAttribute);
          if (this.morphTargetsRelative) {
            _vector$8.addVectors(_box$2.min, _boxMorphTargets.min);
            _box$2.expandByPoint(_vector$8);
            _vector$8.addVectors(_box$2.max, _boxMorphTargets.max);
            _box$2.expandByPoint(_vector$8);
          } else {
            _box$2.expandByPoint(_boxMorphTargets.min);
            _box$2.expandByPoint(_boxMorphTargets.max);
          }
        }
      }
      _box$2.getCenter(center);
      let maxRadiusSq = 0;
      for (let i = 0, il = position.count; i < il; i++) {
        _vector$8.fromBufferAttribute(position, i);
        maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(_vector$8));
      }
      if (morphAttributesPosition) {
        for (let i = 0, il = morphAttributesPosition.length; i < il; i++) {
          const morphAttribute = morphAttributesPosition[i];
          const morphTargetsRelative = this.morphTargetsRelative;
          for (let j = 0, jl = morphAttribute.count; j < jl; j++) {
            _vector$8.fromBufferAttribute(morphAttribute, j);
            if (morphTargetsRelative) {
              _offset.fromBufferAttribute(position, j);
              _vector$8.add(_offset);
            }
            maxRadiusSq = Math.max(maxRadiusSq, center.distanceToSquared(_vector$8));
          }
        }
      }
      this.boundingSphere.radius = Math.sqrt(maxRadiusSq);
      if (isNaN(this.boundingSphere.radius)) {
        console.error('THREE.BufferGeometry.computeBoundingSphere(): Computed radius is NaN. The "position" attribute is likely to have NaN values.', this);
      }
    }
  }
  computeTangents() {
    const index = this.index;
    const attributes = this.attributes;
    if (index === null || attributes.position === void 0 || attributes.normal === void 0 || attributes.uv === void 0) {
      console.error("THREE.BufferGeometry: .computeTangents() failed. Missing required attributes (index, position, normal or uv)");
      return;
    }
    const positionAttribute = attributes.position;
    const normalAttribute = attributes.normal;
    const uvAttribute = attributes.uv;
    if (this.hasAttribute("tangent") === false) {
      this.setAttribute("tangent", new BufferAttribute(new Float32Array(4 * positionAttribute.count), 4));
    }
    const tangentAttribute = this.getAttribute("tangent");
    const tan1 = [], tan2 = [];
    for (let i = 0; i < positionAttribute.count; i++) {
      tan1[i] = new Vector3();
      tan2[i] = new Vector3();
    }
    const vA = new Vector3(), vB = new Vector3(), vC = new Vector3(), uvA = new Vector2(), uvB = new Vector2(), uvC = new Vector2(), sdir = new Vector3(), tdir = new Vector3();
    function handleTriangle(a, b, c) {
      vA.fromBufferAttribute(positionAttribute, a);
      vB.fromBufferAttribute(positionAttribute, b);
      vC.fromBufferAttribute(positionAttribute, c);
      uvA.fromBufferAttribute(uvAttribute, a);
      uvB.fromBufferAttribute(uvAttribute, b);
      uvC.fromBufferAttribute(uvAttribute, c);
      vB.sub(vA);
      vC.sub(vA);
      uvB.sub(uvA);
      uvC.sub(uvA);
      const r = 1 / (uvB.x * uvC.y - uvC.x * uvB.y);
      if (!isFinite(r)) return;
      sdir.copy(vB).multiplyScalar(uvC.y).addScaledVector(vC, -uvB.y).multiplyScalar(r);
      tdir.copy(vC).multiplyScalar(uvB.x).addScaledVector(vB, -uvC.x).multiplyScalar(r);
      tan1[a].add(sdir);
      tan1[b].add(sdir);
      tan1[c].add(sdir);
      tan2[a].add(tdir);
      tan2[b].add(tdir);
      tan2[c].add(tdir);
    }
    __name(handleTriangle, "handleTriangle");
    let groups = this.groups;
    if (groups.length === 0) {
      groups = [{
        start: 0,
        count: index.count
      }];
    }
    for (let i = 0, il = groups.length; i < il; ++i) {
      const group = groups[i];
      const start = group.start;
      const count = group.count;
      for (let j = start, jl = start + count; j < jl; j += 3) {
        handleTriangle(
          index.getX(j + 0),
          index.getX(j + 1),
          index.getX(j + 2)
        );
      }
    }
    const tmp = new Vector3(), tmp2 = new Vector3();
    const n = new Vector3(), n2 = new Vector3();
    function handleVertex(v) {
      n.fromBufferAttribute(normalAttribute, v);
      n2.copy(n);
      const t = tan1[v];
      tmp.copy(t);
      tmp.sub(n.multiplyScalar(n.dot(t))).normalize();
      tmp2.crossVectors(n2, t);
      const test = tmp2.dot(tan2[v]);
      const w = test < 0 ? -1 : 1;
      tangentAttribute.setXYZW(v, tmp.x, tmp.y, tmp.z, w);
    }
    __name(handleVertex, "handleVertex");
    for (let i = 0, il = groups.length; i < il; ++i) {
      const group = groups[i];
      const start = group.start;
      const count = group.count;
      for (let j = start, jl = start + count; j < jl; j += 3) {
        handleVertex(index.getX(j + 0));
        handleVertex(index.getX(j + 1));
        handleVertex(index.getX(j + 2));
      }
    }
  }
  computeVertexNormals() {
    const index = this.index;
    const positionAttribute = this.getAttribute("position");
    if (positionAttribute !== void 0) {
      let normalAttribute = this.getAttribute("normal");
      if (normalAttribute === void 0) {
        normalAttribute = new BufferAttribute(new Float32Array(positionAttribute.count * 3), 3);
        this.setAttribute("normal", normalAttribute);
      } else {
        for (let i = 0, il = normalAttribute.count; i < il; i++) {
          normalAttribute.setXYZ(i, 0, 0, 0);
        }
      }
      const pA = new Vector3(), pB = new Vector3(), pC = new Vector3();
      const nA = new Vector3(), nB = new Vector3(), nC = new Vector3();
      const cb = new Vector3(), ab = new Vector3();
      if (index) {
        for (let i = 0, il = index.count; i < il; i += 3) {
          const vA = index.getX(i + 0);
          const vB = index.getX(i + 1);
          const vC = index.getX(i + 2);
          pA.fromBufferAttribute(positionAttribute, vA);
          pB.fromBufferAttribute(positionAttribute, vB);
          pC.fromBufferAttribute(positionAttribute, vC);
          cb.subVectors(pC, pB);
          ab.subVectors(pA, pB);
          cb.cross(ab);
          nA.fromBufferAttribute(normalAttribute, vA);
          nB.fromBufferAttribute(normalAttribute, vB);
          nC.fromBufferAttribute(normalAttribute, vC);
          nA.add(cb);
          nB.add(cb);
          nC.add(cb);
          normalAttribute.setXYZ(vA, nA.x, nA.y, nA.z);
          normalAttribute.setXYZ(vB, nB.x, nB.y, nB.z);
          normalAttribute.setXYZ(vC, nC.x, nC.y, nC.z);
        }
      } else {
        for (let i = 0, il = positionAttribute.count; i < il; i += 3) {
          pA.fromBufferAttribute(positionAttribute, i + 0);
          pB.fromBufferAttribute(positionAttribute, i + 1);
          pC.fromBufferAttribute(positionAttribute, i + 2);
          cb.subVectors(pC, pB);
          ab.subVectors(pA, pB);
          cb.cross(ab);
          normalAttribute.setXYZ(i + 0, cb.x, cb.y, cb.z);
          normalAttribute.setXYZ(i + 1, cb.x, cb.y, cb.z);
          normalAttribute.setXYZ(i + 2, cb.x, cb.y, cb.z);
        }
      }
      this.normalizeNormals();
      normalAttribute.needsUpdate = true;
    }
  }
  normalizeNormals() {
    const normals = this.attributes.normal;
    for (let i = 0, il = normals.count; i < il; i++) {
      _vector$8.fromBufferAttribute(normals, i);
      _vector$8.normalize();
      normals.setXYZ(i, _vector$8.x, _vector$8.y, _vector$8.z);
    }
  }
  toNonIndexed() {
    function convertBufferAttribute(attribute, indices2) {
      const array = attribute.array;
      const itemSize = attribute.itemSize;
      const normalized = attribute.normalized;
      const array2 = new array.constructor(indices2.length * itemSize);
      let index = 0, index2 = 0;
      for (let i = 0, l = indices2.length; i < l; i++) {
        if (attribute.isInterleavedBufferAttribute) {
          index = indices2[i] * attribute.data.stride + attribute.offset;
        } else {
          index = indices2[i] * itemSize;
        }
        for (let j = 0; j < itemSize; j++) {
          array2[index2++] = array[index++];
        }
      }
      return new BufferAttribute(array2, itemSize, normalized);
    }
    __name(convertBufferAttribute, "convertBufferAttribute");
    if (this.index === null) {
      console.warn("THREE.BufferGeometry.toNonIndexed(): BufferGeometry is already non-indexed.");
      return this;
    }
    const geometry2 = new BufferGeometry();
    const indices = this.index.array;
    const attributes = this.attributes;
    for (const name in attributes) {
      const attribute = attributes[name];
      const newAttribute = convertBufferAttribute(attribute, indices);
      geometry2.setAttribute(name, newAttribute);
    }
    const morphAttributes = this.morphAttributes;
    for (const name in morphAttributes) {
      const morphArray = [];
      const morphAttribute = morphAttributes[name];
      for (let i = 0, il = morphAttribute.length; i < il; i++) {
        const attribute = morphAttribute[i];
        const newAttribute = convertBufferAttribute(attribute, indices);
        morphArray.push(newAttribute);
      }
      geometry2.morphAttributes[name] = morphArray;
    }
    geometry2.morphTargetsRelative = this.morphTargetsRelative;
    const groups = this.groups;
    for (let i = 0, l = groups.length; i < l; i++) {
      const group = groups[i];
      geometry2.addGroup(group.start, group.count, group.materialIndex);
    }
    return geometry2;
  }
  toJSON() {
    const data = {
      metadata: {
        version: 4.6,
        type: "BufferGeometry",
        generator: "BufferGeometry.toJSON"
      }
    };
    data.uuid = this.uuid;
    data.type = this.type;
    if (this.name !== "") data.name = this.name;
    if (Object.keys(this.userData).length > 0) data.userData = this.userData;
    if (this.parameters !== void 0) {
      const parameters = this.parameters;
      for (const key in parameters) {
        if (parameters[key] !== void 0) data[key] = parameters[key];
      }
      return data;
    }
    data.data = { attributes: {} };
    const index = this.index;
    if (index !== null) {
      data.data.index = {
        type: index.array.constructor.name,
        array: Array.prototype.slice.call(index.array)
      };
    }
    const attributes = this.attributes;
    for (const key in attributes) {
      const attribute = attributes[key];
      data.data.attributes[key] = attribute.toJSON(data.data);
    }
    const morphAttributes = {};
    let hasMorphAttributes = false;
    for (const key in this.morphAttributes) {
      const attributeArray = this.morphAttributes[key];
      const array = [];
      for (let i = 0, il = attributeArray.length; i < il; i++) {
        const attribute = attributeArray[i];
        array.push(attribute.toJSON(data.data));
      }
      if (array.length > 0) {
        morphAttributes[key] = array;
        hasMorphAttributes = true;
      }
    }
    if (hasMorphAttributes) {
      data.data.morphAttributes = morphAttributes;
      data.data.morphTargetsRelative = this.morphTargetsRelative;
    }
    const groups = this.groups;
    if (groups.length > 0) {
      data.data.groups = JSON.parse(JSON.stringify(groups));
    }
    const boundingSphere = this.boundingSphere;
    if (boundingSphere !== null) {
      data.data.boundingSphere = {
        center: boundingSphere.center.toArray(),
        radius: boundingSphere.radius
      };
    }
    return data;
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(source) {
    this.index = null;
    this.attributes = {};
    this.morphAttributes = {};
    this.groups = [];
    this.boundingBox = null;
    this.boundingSphere = null;
    const data = {};
    this.name = source.name;
    const index = source.index;
    if (index !== null) {
      this.setIndex(index.clone(data));
    }
    const attributes = source.attributes;
    for (const name in attributes) {
      const attribute = attributes[name];
      this.setAttribute(name, attribute.clone(data));
    }
    const morphAttributes = source.morphAttributes;
    for (const name in morphAttributes) {
      const array = [];
      const morphAttribute = morphAttributes[name];
      for (let i = 0, l = morphAttribute.length; i < l; i++) {
        array.push(morphAttribute[i].clone(data));
      }
      this.morphAttributes[name] = array;
    }
    this.morphTargetsRelative = source.morphTargetsRelative;
    const groups = source.groups;
    for (let i = 0, l = groups.length; i < l; i++) {
      const group = groups[i];
      this.addGroup(group.start, group.count, group.materialIndex);
    }
    const boundingBox = source.boundingBox;
    if (boundingBox !== null) {
      this.boundingBox = boundingBox.clone();
    }
    const boundingSphere = source.boundingSphere;
    if (boundingSphere !== null) {
      this.boundingSphere = boundingSphere.clone();
    }
    this.drawRange.start = source.drawRange.start;
    this.drawRange.count = source.drawRange.count;
    this.userData = source.userData;
    return this;
  }
  dispose() {
    this.dispatchEvent({ type: "dispose" });
  }
}
const _inverseMatrix$3 = /* @__PURE__ */ new Matrix4();
const _ray$3 = /* @__PURE__ */ new Ray();
const _sphere$6 = /* @__PURE__ */ new Sphere();
const _sphereHitAt = /* @__PURE__ */ new Vector3();
const _vA$1 = /* @__PURE__ */ new Vector3();
const _vB$1 = /* @__PURE__ */ new Vector3();
const _vC$1 = /* @__PURE__ */ new Vector3();
const _tempA = /* @__PURE__ */ new Vector3();
const _morphA = /* @__PURE__ */ new Vector3();
const _intersectionPoint = /* @__PURE__ */ new Vector3();
const _intersectionPointWorld = /* @__PURE__ */ new Vector3();
class Mesh extends Object3D {
  static {
    __name(this, "Mesh");
  }
  constructor(geometry = new BufferGeometry(), material = new MeshBasicMaterial()) {
    super();
    this.isMesh = true;
    this.type = "Mesh";
    this.geometry = geometry;
    this.material = material;
    this.updateMorphTargets();
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    if (source.morphTargetInfluences !== void 0) {
      this.morphTargetInfluences = source.morphTargetInfluences.slice();
    }
    if (source.morphTargetDictionary !== void 0) {
      this.morphTargetDictionary = Object.assign({}, source.morphTargetDictionary);
    }
    this.material = Array.isArray(source.material) ? source.material.slice() : source.material;
    this.geometry = source.geometry;
    return this;
  }
  updateMorphTargets() {
    const geometry = this.geometry;
    const morphAttributes = geometry.morphAttributes;
    const keys = Object.keys(morphAttributes);
    if (keys.length > 0) {
      const morphAttribute = morphAttributes[keys[0]];
      if (morphAttribute !== void 0) {
        this.morphTargetInfluences = [];
        this.morphTargetDictionary = {};
        for (let m = 0, ml = morphAttribute.length; m < ml; m++) {
          const name = morphAttribute[m].name || String(m);
          this.morphTargetInfluences.push(0);
          this.morphTargetDictionary[name] = m;
        }
      }
    }
  }
  getVertexPosition(index, target) {
    const geometry = this.geometry;
    const position = geometry.attributes.position;
    const morphPosition = geometry.morphAttributes.position;
    const morphTargetsRelative = geometry.morphTargetsRelative;
    target.fromBufferAttribute(position, index);
    const morphInfluences = this.morphTargetInfluences;
    if (morphPosition && morphInfluences) {
      _morphA.set(0, 0, 0);
      for (let i = 0, il = morphPosition.length; i < il; i++) {
        const influence = morphInfluences[i];
        const morphAttribute = morphPosition[i];
        if (influence === 0) continue;
        _tempA.fromBufferAttribute(morphAttribute, index);
        if (morphTargetsRelative) {
          _morphA.addScaledVector(_tempA, influence);
        } else {
          _morphA.addScaledVector(_tempA.sub(target), influence);
        }
      }
      target.add(_morphA);
    }
    return target;
  }
  raycast(raycaster, intersects2) {
    const geometry = this.geometry;
    const material = this.material;
    const matrixWorld = this.matrixWorld;
    if (material === void 0) return;
    if (geometry.boundingSphere === null) geometry.computeBoundingSphere();
    _sphere$6.copy(geometry.boundingSphere);
    _sphere$6.applyMatrix4(matrixWorld);
    _ray$3.copy(raycaster.ray).recast(raycaster.near);
    if (_sphere$6.containsPoint(_ray$3.origin) === false) {
      if (_ray$3.intersectSphere(_sphere$6, _sphereHitAt) === null) return;
      if (_ray$3.origin.distanceToSquared(_sphereHitAt) > (raycaster.far - raycaster.near) ** 2) return;
    }
    _inverseMatrix$3.copy(matrixWorld).invert();
    _ray$3.copy(raycaster.ray).applyMatrix4(_inverseMatrix$3);
    if (geometry.boundingBox !== null) {
      if (_ray$3.intersectsBox(geometry.boundingBox) === false) return;
    }
    this._computeIntersections(raycaster, intersects2, _ray$3);
  }
  _computeIntersections(raycaster, intersects2, rayLocalSpace) {
    let intersection;
    const geometry = this.geometry;
    const material = this.material;
    const index = geometry.index;
    const position = geometry.attributes.position;
    const uv = geometry.attributes.uv;
    const uv1 = geometry.attributes.uv1;
    const normal = geometry.attributes.normal;
    const groups = geometry.groups;
    const drawRange = geometry.drawRange;
    if (index !== null) {
      if (Array.isArray(material)) {
        for (let i = 0, il = groups.length; i < il; i++) {
          const group = groups[i];
          const groupMaterial = material[group.materialIndex];
          const start = Math.max(group.start, drawRange.start);
          const end = Math.min(index.count, Math.min(group.start + group.count, drawRange.start + drawRange.count));
          for (let j = start, jl = end; j < jl; j += 3) {
            const a = index.getX(j);
            const b = index.getX(j + 1);
            const c = index.getX(j + 2);
            intersection = checkGeometryIntersection(this, groupMaterial, raycaster, rayLocalSpace, uv, uv1, normal, a, b, c);
            if (intersection) {
              intersection.faceIndex = Math.floor(j / 3);
              intersection.face.materialIndex = group.materialIndex;
              intersects2.push(intersection);
            }
          }
        }
      } else {
        const start = Math.max(0, drawRange.start);
        const end = Math.min(index.count, drawRange.start + drawRange.count);
        for (let i = start, il = end; i < il; i += 3) {
          const a = index.getX(i);
          const b = index.getX(i + 1);
          const c = index.getX(i + 2);
          intersection = checkGeometryIntersection(this, material, raycaster, rayLocalSpace, uv, uv1, normal, a, b, c);
          if (intersection) {
            intersection.faceIndex = Math.floor(i / 3);
            intersects2.push(intersection);
          }
        }
      }
    } else if (position !== void 0) {
      if (Array.isArray(material)) {
        for (let i = 0, il = groups.length; i < il; i++) {
          const group = groups[i];
          const groupMaterial = material[group.materialIndex];
          const start = Math.max(group.start, drawRange.start);
          const end = Math.min(position.count, Math.min(group.start + group.count, drawRange.start + drawRange.count));
          for (let j = start, jl = end; j < jl; j += 3) {
            const a = j;
            const b = j + 1;
            const c = j + 2;
            intersection = checkGeometryIntersection(this, groupMaterial, raycaster, rayLocalSpace, uv, uv1, normal, a, b, c);
            if (intersection) {
              intersection.faceIndex = Math.floor(j / 3);
              intersection.face.materialIndex = group.materialIndex;
              intersects2.push(intersection);
            }
          }
        }
      } else {
        const start = Math.max(0, drawRange.start);
        const end = Math.min(position.count, drawRange.start + drawRange.count);
        for (let i = start, il = end; i < il; i += 3) {
          const a = i;
          const b = i + 1;
          const c = i + 2;
          intersection = checkGeometryIntersection(this, material, raycaster, rayLocalSpace, uv, uv1, normal, a, b, c);
          if (intersection) {
            intersection.faceIndex = Math.floor(i / 3);
            intersects2.push(intersection);
          }
        }
      }
    }
  }
}
function checkIntersection$1(object, material, raycaster, ray, pA, pB, pC, point) {
  let intersect2;
  if (material.side === BackSide) {
    intersect2 = ray.intersectTriangle(pC, pB, pA, true, point);
  } else {
    intersect2 = ray.intersectTriangle(pA, pB, pC, material.side === FrontSide, point);
  }
  if (intersect2 === null) return null;
  _intersectionPointWorld.copy(point);
  _intersectionPointWorld.applyMatrix4(object.matrixWorld);
  const distance = raycaster.ray.origin.distanceTo(_intersectionPointWorld);
  if (distance < raycaster.near || distance > raycaster.far) return null;
  return {
    distance,
    point: _intersectionPointWorld.clone(),
    object
  };
}
__name(checkIntersection$1, "checkIntersection$1");
function checkGeometryIntersection(object, material, raycaster, ray, uv, uv1, normal, a, b, c) {
  object.getVertexPosition(a, _vA$1);
  object.getVertexPosition(b, _vB$1);
  object.getVertexPosition(c, _vC$1);
  const intersection = checkIntersection$1(object, material, raycaster, ray, _vA$1, _vB$1, _vC$1, _intersectionPoint);
  if (intersection) {
    const barycoord = new Vector3();
    Triangle.getBarycoord(_intersectionPoint, _vA$1, _vB$1, _vC$1, barycoord);
    if (uv) {
      intersection.uv = Triangle.getInterpolatedAttribute(uv, a, b, c, barycoord, new Vector2());
    }
    if (uv1) {
      intersection.uv1 = Triangle.getInterpolatedAttribute(uv1, a, b, c, barycoord, new Vector2());
    }
    if (normal) {
      intersection.normal = Triangle.getInterpolatedAttribute(normal, a, b, c, barycoord, new Vector3());
      if (intersection.normal.dot(ray.direction) > 0) {
        intersection.normal.multiplyScalar(-1);
      }
    }
    const face = {
      a,
      b,
      c,
      normal: new Vector3(),
      materialIndex: 0
    };
    Triangle.getNormal(_vA$1, _vB$1, _vC$1, face.normal);
    intersection.face = face;
    intersection.barycoord = barycoord;
  }
  return intersection;
}
__name(checkGeometryIntersection, "checkGeometryIntersection");
class BoxGeometry extends BufferGeometry {
  static {
    __name(this, "BoxGeometry");
  }
  constructor(width = 1, height = 1, depth = 1, widthSegments = 1, heightSegments = 1, depthSegments = 1) {
    super();
    this.type = "BoxGeometry";
    this.parameters = {
      width,
      height,
      depth,
      widthSegments,
      heightSegments,
      depthSegments
    };
    const scope = this;
    widthSegments = Math.floor(widthSegments);
    heightSegments = Math.floor(heightSegments);
    depthSegments = Math.floor(depthSegments);
    const indices = [];
    const vertices = [];
    const normals = [];
    const uvs = [];
    let numberOfVertices = 0;
    let groupStart = 0;
    buildPlane("z", "y", "x", -1, -1, depth, height, width, depthSegments, heightSegments, 0);
    buildPlane("z", "y", "x", 1, -1, depth, height, -width, depthSegments, heightSegments, 1);
    buildPlane("x", "z", "y", 1, 1, width, depth, height, widthSegments, depthSegments, 2);
    buildPlane("x", "z", "y", 1, -1, width, depth, -height, widthSegments, depthSegments, 3);
    buildPlane("x", "y", "z", 1, -1, width, height, depth, widthSegments, heightSegments, 4);
    buildPlane("x", "y", "z", -1, -1, width, height, -depth, widthSegments, heightSegments, 5);
    this.setIndex(indices);
    this.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    this.setAttribute("normal", new Float32BufferAttribute(normals, 3));
    this.setAttribute("uv", new Float32BufferAttribute(uvs, 2));
    function buildPlane(u, v, w, udir, vdir, width2, height2, depth2, gridX, gridY, materialIndex) {
      const segmentWidth = width2 / gridX;
      const segmentHeight = height2 / gridY;
      const widthHalf = width2 / 2;
      const heightHalf = height2 / 2;
      const depthHalf = depth2 / 2;
      const gridX1 = gridX + 1;
      const gridY1 = gridY + 1;
      let vertexCounter = 0;
      let groupCount = 0;
      const vector = new Vector3();
      for (let iy = 0; iy < gridY1; iy++) {
        const y = iy * segmentHeight - heightHalf;
        for (let ix = 0; ix < gridX1; ix++) {
          const x = ix * segmentWidth - widthHalf;
          vector[u] = x * udir;
          vector[v] = y * vdir;
          vector[w] = depthHalf;
          vertices.push(vector.x, vector.y, vector.z);
          vector[u] = 0;
          vector[v] = 0;
          vector[w] = depth2 > 0 ? 1 : -1;
          normals.push(vector.x, vector.y, vector.z);
          uvs.push(ix / gridX);
          uvs.push(1 - iy / gridY);
          vertexCounter += 1;
        }
      }
      for (let iy = 0; iy < gridY; iy++) {
        for (let ix = 0; ix < gridX; ix++) {
          const a = numberOfVertices + ix + gridX1 * iy;
          const b = numberOfVertices + ix + gridX1 * (iy + 1);
          const c = numberOfVertices + (ix + 1) + gridX1 * (iy + 1);
          const d = numberOfVertices + (ix + 1) + gridX1 * iy;
          indices.push(a, b, d);
          indices.push(b, c, d);
          groupCount += 6;
        }
      }
      scope.addGroup(groupStart, groupCount, materialIndex);
      groupStart += groupCount;
      numberOfVertices += vertexCounter;
    }
    __name(buildPlane, "buildPlane");
  }
  copy(source) {
    super.copy(source);
    this.parameters = Object.assign({}, source.parameters);
    return this;
  }
  static fromJSON(data) {
    return new BoxGeometry(data.width, data.height, data.depth, data.widthSegments, data.heightSegments, data.depthSegments);
  }
}
function cloneUniforms(src) {
  const dst = {};
  for (const u in src) {
    dst[u] = {};
    for (const p in src[u]) {
      const property = src[u][p];
      if (property && (property.isColor || property.isMatrix3 || property.isMatrix4 || property.isVector2 || property.isVector3 || property.isVector4 || property.isTexture || property.isQuaternion)) {
        if (property.isRenderTargetTexture) {
          console.warn("UniformsUtils: Textures of render targets cannot be cloned via cloneUniforms() or mergeUniforms().");
          dst[u][p] = null;
        } else {
          dst[u][p] = property.clone();
        }
      } else if (Array.isArray(property)) {
        dst[u][p] = property.slice();
      } else {
        dst[u][p] = property;
      }
    }
  }
  return dst;
}
__name(cloneUniforms, "cloneUniforms");
function mergeUniforms(uniforms) {
  const merged = {};
  for (let u = 0; u < uniforms.length; u++) {
    const tmp = cloneUniforms(uniforms[u]);
    for (const p in tmp) {
      merged[p] = tmp[p];
    }
  }
  return merged;
}
__name(mergeUniforms, "mergeUniforms");
function cloneUniformsGroups(src) {
  const dst = [];
  for (let u = 0; u < src.length; u++) {
    dst.push(src[u].clone());
  }
  return dst;
}
__name(cloneUniformsGroups, "cloneUniformsGroups");
function getUnlitUniformColorSpace(renderer) {
  const currentRenderTarget = renderer.getRenderTarget();
  if (currentRenderTarget === null) {
    return renderer.outputColorSpace;
  }
  if (currentRenderTarget.isXRRenderTarget === true) {
    return currentRenderTarget.texture.colorSpace;
  }
  return ColorManagement.workingColorSpace;
}
__name(getUnlitUniformColorSpace, "getUnlitUniformColorSpace");
const UniformsUtils = { clone: cloneUniforms, merge: mergeUniforms };
var default_vertex = "void main() {\n	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );\n}";
var default_fragment = "void main() {\n	gl_FragColor = vec4( 1.0, 0.0, 0.0, 1.0 );\n}";
class ShaderMaterial extends Material {
  static {
    __name(this, "ShaderMaterial");
  }
  static get type() {
    return "ShaderMaterial";
  }
  constructor(parameters) {
    super();
    this.isShaderMaterial = true;
    this.defines = {};
    this.uniforms = {};
    this.uniformsGroups = [];
    this.vertexShader = default_vertex;
    this.fragmentShader = default_fragment;
    this.linewidth = 1;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.fog = false;
    this.lights = false;
    this.clipping = false;
    this.forceSinglePass = true;
    this.extensions = {
      clipCullDistance: false,
      // set to use vertex shader clipping
      multiDraw: false
      // set to use vertex shader multi_draw / enable gl_DrawID
    };
    this.defaultAttributeValues = {
      "color": [1, 1, 1],
      "uv": [0, 0],
      "uv1": [0, 0]
    };
    this.index0AttributeName = void 0;
    this.uniformsNeedUpdate = false;
    this.glslVersion = null;
    if (parameters !== void 0) {
      this.setValues(parameters);
    }
  }
  copy(source) {
    super.copy(source);
    this.fragmentShader = source.fragmentShader;
    this.vertexShader = source.vertexShader;
    this.uniforms = cloneUniforms(source.uniforms);
    this.uniformsGroups = cloneUniformsGroups(source.uniformsGroups);
    this.defines = Object.assign({}, source.defines);
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.fog = source.fog;
    this.lights = source.lights;
    this.clipping = source.clipping;
    this.extensions = Object.assign({}, source.extensions);
    this.glslVersion = source.glslVersion;
    return this;
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    data.glslVersion = this.glslVersion;
    data.uniforms = {};
    for (const name in this.uniforms) {
      const uniform = this.uniforms[name];
      const value = uniform.value;
      if (value && value.isTexture) {
        data.uniforms[name] = {
          type: "t",
          value: value.toJSON(meta).uuid
        };
      } else if (value && value.isColor) {
        data.uniforms[name] = {
          type: "c",
          value: value.getHex()
        };
      } else if (value && value.isVector2) {
        data.uniforms[name] = {
          type: "v2",
          value: value.toArray()
        };
      } else if (value && value.isVector3) {
        data.uniforms[name] = {
          type: "v3",
          value: value.toArray()
        };
      } else if (value && value.isVector4) {
        data.uniforms[name] = {
          type: "v4",
          value: value.toArray()
        };
      } else if (value && value.isMatrix3) {
        data.uniforms[name] = {
          type: "m3",
          value: value.toArray()
        };
      } else if (value && value.isMatrix4) {
        data.uniforms[name] = {
          type: "m4",
          value: value.toArray()
        };
      } else {
        data.uniforms[name] = {
          value
        };
      }
    }
    if (Object.keys(this.defines).length > 0) data.defines = this.defines;
    data.vertexShader = this.vertexShader;
    data.fragmentShader = this.fragmentShader;
    data.lights = this.lights;
    data.clipping = this.clipping;
    const extensions = {};
    for (const key in this.extensions) {
      if (this.extensions[key] === true) extensions[key] = true;
    }
    if (Object.keys(extensions).length > 0) data.extensions = extensions;
    return data;
  }
}
class Camera extends Object3D {
  static {
    __name(this, "Camera");
  }
  constructor() {
    super();
    this.isCamera = true;
    this.type = "Camera";
    this.matrixWorldInverse = new Matrix4();
    this.projectionMatrix = new Matrix4();
    this.projectionMatrixInverse = new Matrix4();
    this.coordinateSystem = WebGLCoordinateSystem;
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.matrixWorldInverse.copy(source.matrixWorldInverse);
    this.projectionMatrix.copy(source.projectionMatrix);
    this.projectionMatrixInverse.copy(source.projectionMatrixInverse);
    this.coordinateSystem = source.coordinateSystem;
    return this;
  }
  getWorldDirection(target) {
    return super.getWorldDirection(target).negate();
  }
  updateMatrixWorld(force) {
    super.updateMatrixWorld(force);
    this.matrixWorldInverse.copy(this.matrixWorld).invert();
  }
  updateWorldMatrix(updateParents, updateChildren) {
    super.updateWorldMatrix(updateParents, updateChildren);
    this.matrixWorldInverse.copy(this.matrixWorld).invert();
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
const _v3$1 = /* @__PURE__ */ new Vector3();
const _minTarget = /* @__PURE__ */ new Vector2();
const _maxTarget = /* @__PURE__ */ new Vector2();
class PerspectiveCamera extends Camera {
  static {
    __name(this, "PerspectiveCamera");
  }
  constructor(fov2 = 50, aspect2 = 1, near = 0.1, far = 2e3) {
    super();
    this.isPerspectiveCamera = true;
    this.type = "PerspectiveCamera";
    this.fov = fov2;
    this.zoom = 1;
    this.near = near;
    this.far = far;
    this.focus = 10;
    this.aspect = aspect2;
    this.view = null;
    this.filmGauge = 35;
    this.filmOffset = 0;
    this.updateProjectionMatrix();
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.fov = source.fov;
    this.zoom = source.zoom;
    this.near = source.near;
    this.far = source.far;
    this.focus = source.focus;
    this.aspect = source.aspect;
    this.view = source.view === null ? null : Object.assign({}, source.view);
    this.filmGauge = source.filmGauge;
    this.filmOffset = source.filmOffset;
    return this;
  }
  /**
   * Sets the FOV by focal length in respect to the current .filmGauge.
   *
   * The default film gauge is 35, so that the focal length can be specified for
   * a 35mm (full frame) camera.
   *
   * Values for focal length and film gauge must have the same unit.
   */
  setFocalLength(focalLength) {
    const vExtentSlope = 0.5 * this.getFilmHeight() / focalLength;
    this.fov = RAD2DEG * 2 * Math.atan(vExtentSlope);
    this.updateProjectionMatrix();
  }
  /**
   * Calculates the focal length from the current .fov and .filmGauge.
   */
  getFocalLength() {
    const vExtentSlope = Math.tan(DEG2RAD * 0.5 * this.fov);
    return 0.5 * this.getFilmHeight() / vExtentSlope;
  }
  getEffectiveFOV() {
    return RAD2DEG * 2 * Math.atan(
      Math.tan(DEG2RAD * 0.5 * this.fov) / this.zoom
    );
  }
  getFilmWidth() {
    return this.filmGauge * Math.min(this.aspect, 1);
  }
  getFilmHeight() {
    return this.filmGauge / Math.max(this.aspect, 1);
  }
  /**
   * Computes the 2D bounds of the camera's viewable rectangle at a given distance along the viewing direction.
   * Sets minTarget and maxTarget to the coordinates of the lower-left and upper-right corners of the view rectangle.
   */
  getViewBounds(distance, minTarget, maxTarget) {
    _v3$1.set(-1, -1, 0.5).applyMatrix4(this.projectionMatrixInverse);
    minTarget.set(_v3$1.x, _v3$1.y).multiplyScalar(-distance / _v3$1.z);
    _v3$1.set(1, 1, 0.5).applyMatrix4(this.projectionMatrixInverse);
    maxTarget.set(_v3$1.x, _v3$1.y).multiplyScalar(-distance / _v3$1.z);
  }
  /**
   * Computes the width and height of the camera's viewable rectangle at a given distance along the viewing direction.
   * Copies the result into the target Vector2, where x is width and y is height.
   */
  getViewSize(distance, target) {
    this.getViewBounds(distance, _minTarget, _maxTarget);
    return target.subVectors(_maxTarget, _minTarget);
  }
  /**
   * Sets an offset in a larger frustum. This is useful for multi-window or
   * multi-monitor/multi-machine setups.
   *
   * For example, if you have 3x2 monitors and each monitor is 1920x1080 and
   * the monitors are in grid like this
   *
   *   +---+---+---+
   *   | A | B | C |
   *   +---+---+---+
   *   | D | E | F |
   *   +---+---+---+
   *
   * then for each monitor you would call it like this
   *
   *   const w = 1920;
   *   const h = 1080;
   *   const fullWidth = w * 3;
   *   const fullHeight = h * 2;
   *
   *   --A--
   *   camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 0, w, h );
   *   --B--
   *   camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 0, w, h );
   *   --C--
   *   camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 0, w, h );
   *   --D--
   *   camera.setViewOffset( fullWidth, fullHeight, w * 0, h * 1, w, h );
   *   --E--
   *   camera.setViewOffset( fullWidth, fullHeight, w * 1, h * 1, w, h );
   *   --F--
   *   camera.setViewOffset( fullWidth, fullHeight, w * 2, h * 1, w, h );
   *
   *   Note there is no reason monitors have to be the same size or in a grid.
   */
  setViewOffset(fullWidth, fullHeight, x, y, width, height) {
    this.aspect = fullWidth / fullHeight;
    if (this.view === null) {
      this.view = {
        enabled: true,
        fullWidth: 1,
        fullHeight: 1,
        offsetX: 0,
        offsetY: 0,
        width: 1,
        height: 1
      };
    }
    this.view.enabled = true;
    this.view.fullWidth = fullWidth;
    this.view.fullHeight = fullHeight;
    this.view.offsetX = x;
    this.view.offsetY = y;
    this.view.width = width;
    this.view.height = height;
    this.updateProjectionMatrix();
  }
  clearViewOffset() {
    if (this.view !== null) {
      this.view.enabled = false;
    }
    this.updateProjectionMatrix();
  }
  updateProjectionMatrix() {
    const near = this.near;
    let top = near * Math.tan(DEG2RAD * 0.5 * this.fov) / this.zoom;
    let height = 2 * top;
    let width = this.aspect * height;
    let left = -0.5 * width;
    const view = this.view;
    if (this.view !== null && this.view.enabled) {
      const fullWidth = view.fullWidth, fullHeight = view.fullHeight;
      left += view.offsetX * width / fullWidth;
      top -= view.offsetY * height / fullHeight;
      width *= view.width / fullWidth;
      height *= view.height / fullHeight;
    }
    const skew = this.filmOffset;
    if (skew !== 0) left += near * skew / this.getFilmWidth();
    this.projectionMatrix.makePerspective(left, left + width, top, top - height, near, this.far, this.coordinateSystem);
    this.projectionMatrixInverse.copy(this.projectionMatrix).invert();
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    data.object.fov = this.fov;
    data.object.zoom = this.zoom;
    data.object.near = this.near;
    data.object.far = this.far;
    data.object.focus = this.focus;
    data.object.aspect = this.aspect;
    if (this.view !== null) data.object.view = Object.assign({}, this.view);
    data.object.filmGauge = this.filmGauge;
    data.object.filmOffset = this.filmOffset;
    return data;
  }
}
const fov = -90;
const aspect = 1;
class CubeCamera extends Object3D {
  static {
    __name(this, "CubeCamera");
  }
  constructor(near, far, renderTarget) {
    super();
    this.type = "CubeCamera";
    this.renderTarget = renderTarget;
    this.coordinateSystem = null;
    this.activeMipmapLevel = 0;
    const cameraPX = new PerspectiveCamera(fov, aspect, near, far);
    cameraPX.layers = this.layers;
    this.add(cameraPX);
    const cameraNX = new PerspectiveCamera(fov, aspect, near, far);
    cameraNX.layers = this.layers;
    this.add(cameraNX);
    const cameraPY = new PerspectiveCamera(fov, aspect, near, far);
    cameraPY.layers = this.layers;
    this.add(cameraPY);
    const cameraNY = new PerspectiveCamera(fov, aspect, near, far);
    cameraNY.layers = this.layers;
    this.add(cameraNY);
    const cameraPZ = new PerspectiveCamera(fov, aspect, near, far);
    cameraPZ.layers = this.layers;
    this.add(cameraPZ);
    const cameraNZ = new PerspectiveCamera(fov, aspect, near, far);
    cameraNZ.layers = this.layers;
    this.add(cameraNZ);
  }
  updateCoordinateSystem() {
    const coordinateSystem = this.coordinateSystem;
    const cameras = this.children.concat();
    const [cameraPX, cameraNX, cameraPY, cameraNY, cameraPZ, cameraNZ] = cameras;
    for (const camera of cameras) this.remove(camera);
    if (coordinateSystem === WebGLCoordinateSystem) {
      cameraPX.up.set(0, 1, 0);
      cameraPX.lookAt(1, 0, 0);
      cameraNX.up.set(0, 1, 0);
      cameraNX.lookAt(-1, 0, 0);
      cameraPY.up.set(0, 0, -1);
      cameraPY.lookAt(0, 1, 0);
      cameraNY.up.set(0, 0, 1);
      cameraNY.lookAt(0, -1, 0);
      cameraPZ.up.set(0, 1, 0);
      cameraPZ.lookAt(0, 0, 1);
      cameraNZ.up.set(0, 1, 0);
      cameraNZ.lookAt(0, 0, -1);
    } else if (coordinateSystem === WebGPUCoordinateSystem) {
      cameraPX.up.set(0, -1, 0);
      cameraPX.lookAt(-1, 0, 0);
      cameraNX.up.set(0, -1, 0);
      cameraNX.lookAt(1, 0, 0);
      cameraPY.up.set(0, 0, 1);
      cameraPY.lookAt(0, 1, 0);
      cameraNY.up.set(0, 0, -1);
      cameraNY.lookAt(0, -1, 0);
      cameraPZ.up.set(0, -1, 0);
      cameraPZ.lookAt(0, 0, 1);
      cameraNZ.up.set(0, -1, 0);
      cameraNZ.lookAt(0, 0, -1);
    } else {
      throw new Error("THREE.CubeCamera.updateCoordinateSystem(): Invalid coordinate system: " + coordinateSystem);
    }
    for (const camera of cameras) {
      this.add(camera);
      camera.updateMatrixWorld();
    }
  }
  update(renderer, scene) {
    if (this.parent === null) this.updateMatrixWorld();
    const { renderTarget, activeMipmapLevel } = this;
    if (this.coordinateSystem !== renderer.coordinateSystem) {
      this.coordinateSystem = renderer.coordinateSystem;
      this.updateCoordinateSystem();
    }
    const [cameraPX, cameraNX, cameraPY, cameraNY, cameraPZ, cameraNZ] = this.children;
    const currentRenderTarget = renderer.getRenderTarget();
    const currentActiveCubeFace = renderer.getActiveCubeFace();
    const currentActiveMipmapLevel = renderer.getActiveMipmapLevel();
    const currentXrEnabled = renderer.xr.enabled;
    renderer.xr.enabled = false;
    const generateMipmaps = renderTarget.texture.generateMipmaps;
    renderTarget.texture.generateMipmaps = false;
    renderer.setRenderTarget(renderTarget, 0, activeMipmapLevel);
    renderer.render(scene, cameraPX);
    renderer.setRenderTarget(renderTarget, 1, activeMipmapLevel);
    renderer.render(scene, cameraNX);
    renderer.setRenderTarget(renderTarget, 2, activeMipmapLevel);
    renderer.render(scene, cameraPY);
    renderer.setRenderTarget(renderTarget, 3, activeMipmapLevel);
    renderer.render(scene, cameraNY);
    renderer.setRenderTarget(renderTarget, 4, activeMipmapLevel);
    renderer.render(scene, cameraPZ);
    renderTarget.texture.generateMipmaps = generateMipmaps;
    renderer.setRenderTarget(renderTarget, 5, activeMipmapLevel);
    renderer.render(scene, cameraNZ);
    renderer.setRenderTarget(currentRenderTarget, currentActiveCubeFace, currentActiveMipmapLevel);
    renderer.xr.enabled = currentXrEnabled;
    renderTarget.texture.needsPMREMUpdate = true;
  }
}
class CubeTexture extends Texture {
  static {
    __name(this, "CubeTexture");
  }
  constructor(images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, colorSpace) {
    images = images !== void 0 ? images : [];
    mapping = mapping !== void 0 ? mapping : CubeReflectionMapping;
    super(images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, colorSpace);
    this.isCubeTexture = true;
    this.flipY = false;
  }
  get images() {
    return this.image;
  }
  set images(value) {
    this.image = value;
  }
}
class WebGLCubeRenderTarget extends WebGLRenderTarget {
  static {
    __name(this, "WebGLCubeRenderTarget");
  }
  constructor(size = 1, options = {}) {
    super(size, size, options);
    this.isWebGLCubeRenderTarget = true;
    const image = { width: size, height: size, depth: 1 };
    const images = [image, image, image, image, image, image];
    this.texture = new CubeTexture(images, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.colorSpace);
    this.texture.isRenderTargetTexture = true;
    this.texture.generateMipmaps = options.generateMipmaps !== void 0 ? options.generateMipmaps : false;
    this.texture.minFilter = options.minFilter !== void 0 ? options.minFilter : LinearFilter;
  }
  fromEquirectangularTexture(renderer, texture) {
    this.texture.type = texture.type;
    this.texture.colorSpace = texture.colorSpace;
    this.texture.generateMipmaps = texture.generateMipmaps;
    this.texture.minFilter = texture.minFilter;
    this.texture.magFilter = texture.magFilter;
    const shader = {
      uniforms: {
        tEquirect: { value: null }
      },
      vertexShader: (
        /* glsl */
        `

				varying vec3 vWorldDirection;

				vec3 transformDirection( in vec3 dir, in mat4 matrix ) {

					return normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );

				}

				void main() {

					vWorldDirection = transformDirection( position, modelMatrix );

					#include <begin_vertex>
					#include <project_vertex>

				}
			`
      ),
      fragmentShader: (
        /* glsl */
        `

				uniform sampler2D tEquirect;

				varying vec3 vWorldDirection;

				#include <common>

				void main() {

					vec3 direction = normalize( vWorldDirection );

					vec2 sampleUV = equirectUv( direction );

					gl_FragColor = texture2D( tEquirect, sampleUV );

				}
			`
      )
    };
    const geometry = new BoxGeometry(5, 5, 5);
    const material = new ShaderMaterial({
      name: "CubemapFromEquirect",
      uniforms: cloneUniforms(shader.uniforms),
      vertexShader: shader.vertexShader,
      fragmentShader: shader.fragmentShader,
      side: BackSide,
      blending: NoBlending
    });
    material.uniforms.tEquirect.value = texture;
    const mesh = new Mesh(geometry, material);
    const currentMinFilter = texture.minFilter;
    if (texture.minFilter === LinearMipmapLinearFilter) texture.minFilter = LinearFilter;
    const camera = new CubeCamera(1, 10, this);
    camera.update(renderer, mesh);
    texture.minFilter = currentMinFilter;
    mesh.geometry.dispose();
    mesh.material.dispose();
    return this;
  }
  clear(renderer, color, depth, stencil) {
    const currentRenderTarget = renderer.getRenderTarget();
    for (let i = 0; i < 6; i++) {
      renderer.setRenderTarget(this, i);
      renderer.clear(color, depth, stencil);
    }
    renderer.setRenderTarget(currentRenderTarget);
  }
}
const _vector1 = /* @__PURE__ */ new Vector3();
const _vector2 = /* @__PURE__ */ new Vector3();
const _normalMatrix = /* @__PURE__ */ new Matrix3();
class Plane {
  static {
    __name(this, "Plane");
  }
  constructor(normal = new Vector3(1, 0, 0), constant = 0) {
    this.isPlane = true;
    this.normal = normal;
    this.constant = constant;
  }
  set(normal, constant) {
    this.normal.copy(normal);
    this.constant = constant;
    return this;
  }
  setComponents(x, y, z, w) {
    this.normal.set(x, y, z);
    this.constant = w;
    return this;
  }
  setFromNormalAndCoplanarPoint(normal, point) {
    this.normal.copy(normal);
    this.constant = -point.dot(this.normal);
    return this;
  }
  setFromCoplanarPoints(a, b, c) {
    const normal = _vector1.subVectors(c, b).cross(_vector2.subVectors(a, b)).normalize();
    this.setFromNormalAndCoplanarPoint(normal, a);
    return this;
  }
  copy(plane) {
    this.normal.copy(plane.normal);
    this.constant = plane.constant;
    return this;
  }
  normalize() {
    const inverseNormalLength = 1 / this.normal.length();
    this.normal.multiplyScalar(inverseNormalLength);
    this.constant *= inverseNormalLength;
    return this;
  }
  negate() {
    this.constant *= -1;
    this.normal.negate();
    return this;
  }
  distanceToPoint(point) {
    return this.normal.dot(point) + this.constant;
  }
  distanceToSphere(sphere) {
    return this.distanceToPoint(sphere.center) - sphere.radius;
  }
  projectPoint(point, target) {
    return target.copy(point).addScaledVector(this.normal, -this.distanceToPoint(point));
  }
  intersectLine(line, target) {
    const direction = line.delta(_vector1);
    const denominator = this.normal.dot(direction);
    if (denominator === 0) {
      if (this.distanceToPoint(line.start) === 0) {
        return target.copy(line.start);
      }
      return null;
    }
    const t = -(line.start.dot(this.normal) + this.constant) / denominator;
    if (t < 0 || t > 1) {
      return null;
    }
    return target.copy(line.start).addScaledVector(direction, t);
  }
  intersectsLine(line) {
    const startSign = this.distanceToPoint(line.start);
    const endSign = this.distanceToPoint(line.end);
    return startSign < 0 && endSign > 0 || endSign < 0 && startSign > 0;
  }
  intersectsBox(box) {
    return box.intersectsPlane(this);
  }
  intersectsSphere(sphere) {
    return sphere.intersectsPlane(this);
  }
  coplanarPoint(target) {
    return target.copy(this.normal).multiplyScalar(-this.constant);
  }
  applyMatrix4(matrix, optionalNormalMatrix) {
    const normalMatrix = optionalNormalMatrix || _normalMatrix.getNormalMatrix(matrix);
    const referencePoint = this.coplanarPoint(_vector1).applyMatrix4(matrix);
    const normal = this.normal.applyMatrix3(normalMatrix).normalize();
    this.constant = -referencePoint.dot(normal);
    return this;
  }
  translate(offset) {
    this.constant -= offset.dot(this.normal);
    return this;
  }
  equals(plane) {
    return plane.normal.equals(this.normal) && plane.constant === this.constant;
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
const _sphere$5 = /* @__PURE__ */ new Sphere();
const _vector$7 = /* @__PURE__ */ new Vector3();
class Frustum {
  static {
    __name(this, "Frustum");
  }
  constructor(p0 = new Plane(), p1 = new Plane(), p2 = new Plane(), p3 = new Plane(), p4 = new Plane(), p5 = new Plane()) {
    this.planes = [p0, p1, p2, p3, p4, p5];
  }
  set(p0, p1, p2, p3, p4, p5) {
    const planes = this.planes;
    planes[0].copy(p0);
    planes[1].copy(p1);
    planes[2].copy(p2);
    planes[3].copy(p3);
    planes[4].copy(p4);
    planes[5].copy(p5);
    return this;
  }
  copy(frustum) {
    const planes = this.planes;
    for (let i = 0; i < 6; i++) {
      planes[i].copy(frustum.planes[i]);
    }
    return this;
  }
  setFromProjectionMatrix(m, coordinateSystem = WebGLCoordinateSystem) {
    const planes = this.planes;
    const me = m.elements;
    const me0 = me[0], me1 = me[1], me2 = me[2], me3 = me[3];
    const me4 = me[4], me5 = me[5], me6 = me[6], me7 = me[7];
    const me8 = me[8], me9 = me[9], me10 = me[10], me11 = me[11];
    const me12 = me[12], me13 = me[13], me14 = me[14], me15 = me[15];
    planes[0].setComponents(me3 - me0, me7 - me4, me11 - me8, me15 - me12).normalize();
    planes[1].setComponents(me3 + me0, me7 + me4, me11 + me8, me15 + me12).normalize();
    planes[2].setComponents(me3 + me1, me7 + me5, me11 + me9, me15 + me13).normalize();
    planes[3].setComponents(me3 - me1, me7 - me5, me11 - me9, me15 - me13).normalize();
    planes[4].setComponents(me3 - me2, me7 - me6, me11 - me10, me15 - me14).normalize();
    if (coordinateSystem === WebGLCoordinateSystem) {
      planes[5].setComponents(me3 + me2, me7 + me6, me11 + me10, me15 + me14).normalize();
    } else if (coordinateSystem === WebGPUCoordinateSystem) {
      planes[5].setComponents(me2, me6, me10, me14).normalize();
    } else {
      throw new Error("THREE.Frustum.setFromProjectionMatrix(): Invalid coordinate system: " + coordinateSystem);
    }
    return this;
  }
  intersectsObject(object) {
    if (object.boundingSphere !== void 0) {
      if (object.boundingSphere === null) object.computeBoundingSphere();
      _sphere$5.copy(object.boundingSphere).applyMatrix4(object.matrixWorld);
    } else {
      const geometry = object.geometry;
      if (geometry.boundingSphere === null) geometry.computeBoundingSphere();
      _sphere$5.copy(geometry.boundingSphere).applyMatrix4(object.matrixWorld);
    }
    return this.intersectsSphere(_sphere$5);
  }
  intersectsSprite(sprite) {
    _sphere$5.center.set(0, 0, 0);
    _sphere$5.radius = 0.7071067811865476;
    _sphere$5.applyMatrix4(sprite.matrixWorld);
    return this.intersectsSphere(_sphere$5);
  }
  intersectsSphere(sphere) {
    const planes = this.planes;
    const center = sphere.center;
    const negRadius = -sphere.radius;
    for (let i = 0; i < 6; i++) {
      const distance = planes[i].distanceToPoint(center);
      if (distance < negRadius) {
        return false;
      }
    }
    return true;
  }
  intersectsBox(box) {
    const planes = this.planes;
    for (let i = 0; i < 6; i++) {
      const plane = planes[i];
      _vector$7.x = plane.normal.x > 0 ? box.max.x : box.min.x;
      _vector$7.y = plane.normal.y > 0 ? box.max.y : box.min.y;
      _vector$7.z = plane.normal.z > 0 ? box.max.z : box.min.z;
      if (plane.distanceToPoint(_vector$7) < 0) {
        return false;
      }
    }
    return true;
  }
  containsPoint(point) {
    const planes = this.planes;
    for (let i = 0; i < 6; i++) {
      if (planes[i].distanceToPoint(point) < 0) {
        return false;
      }
    }
    return true;
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
function WebGLAnimation() {
  let context = null;
  let isAnimating = false;
  let animationLoop = null;
  let requestId = null;
  function onAnimationFrame(time, frame) {
    animationLoop(time, frame);
    requestId = context.requestAnimationFrame(onAnimationFrame);
  }
  __name(onAnimationFrame, "onAnimationFrame");
  return {
    start: /* @__PURE__ */ __name(function() {
      if (isAnimating === true) return;
      if (animationLoop === null) return;
      requestId = context.requestAnimationFrame(onAnimationFrame);
      isAnimating = true;
    }, "start"),
    stop: /* @__PURE__ */ __name(function() {
      context.cancelAnimationFrame(requestId);
      isAnimating = false;
    }, "stop"),
    setAnimationLoop: /* @__PURE__ */ __name(function(callback) {
      animationLoop = callback;
    }, "setAnimationLoop"),
    setContext: /* @__PURE__ */ __name(function(value) {
      context = value;
    }, "setContext")
  };
}
__name(WebGLAnimation, "WebGLAnimation");
function WebGLAttributes(gl) {
  const buffers = /* @__PURE__ */ new WeakMap();
  function createBuffer(attribute, bufferType) {
    const array = attribute.array;
    const usage = attribute.usage;
    const size = array.byteLength;
    const buffer = gl.createBuffer();
    gl.bindBuffer(bufferType, buffer);
    gl.bufferData(bufferType, array, usage);
    attribute.onUploadCallback();
    let type;
    if (array instanceof Float32Array) {
      type = gl.FLOAT;
    } else if (array instanceof Uint16Array) {
      if (attribute.isFloat16BufferAttribute) {
        type = gl.HALF_FLOAT;
      } else {
        type = gl.UNSIGNED_SHORT;
      }
    } else if (array instanceof Int16Array) {
      type = gl.SHORT;
    } else if (array instanceof Uint32Array) {
      type = gl.UNSIGNED_INT;
    } else if (array instanceof Int32Array) {
      type = gl.INT;
    } else if (array instanceof Int8Array) {
      type = gl.BYTE;
    } else if (array instanceof Uint8Array) {
      type = gl.UNSIGNED_BYTE;
    } else if (array instanceof Uint8ClampedArray) {
      type = gl.UNSIGNED_BYTE;
    } else {
      throw new Error("THREE.WebGLAttributes: Unsupported buffer data format: " + array);
    }
    return {
      buffer,
      type,
      bytesPerElement: array.BYTES_PER_ELEMENT,
      version: attribute.version,
      size
    };
  }
  __name(createBuffer, "createBuffer");
  function updateBuffer(buffer, attribute, bufferType) {
    const array = attribute.array;
    const updateRanges = attribute.updateRanges;
    gl.bindBuffer(bufferType, buffer);
    if (updateRanges.length === 0) {
      gl.bufferSubData(bufferType, 0, array);
    } else {
      updateRanges.sort((a, b) => a.start - b.start);
      let mergeIndex = 0;
      for (let i = 1; i < updateRanges.length; i++) {
        const previousRange = updateRanges[mergeIndex];
        const range = updateRanges[i];
        if (range.start <= previousRange.start + previousRange.count + 1) {
          previousRange.count = Math.max(
            previousRange.count,
            range.start + range.count - previousRange.start
          );
        } else {
          ++mergeIndex;
          updateRanges[mergeIndex] = range;
        }
      }
      updateRanges.length = mergeIndex + 1;
      for (let i = 0, l = updateRanges.length; i < l; i++) {
        const range = updateRanges[i];
        gl.bufferSubData(
          bufferType,
          range.start * array.BYTES_PER_ELEMENT,
          array,
          range.start,
          range.count
        );
      }
      attribute.clearUpdateRanges();
    }
    attribute.onUploadCallback();
  }
  __name(updateBuffer, "updateBuffer");
  function get(attribute) {
    if (attribute.isInterleavedBufferAttribute) attribute = attribute.data;
    return buffers.get(attribute);
  }
  __name(get, "get");
  function remove(attribute) {
    if (attribute.isInterleavedBufferAttribute) attribute = attribute.data;
    const data = buffers.get(attribute);
    if (data) {
      gl.deleteBuffer(data.buffer);
      buffers.delete(attribute);
    }
  }
  __name(remove, "remove");
  function update(attribute, bufferType) {
    if (attribute.isInterleavedBufferAttribute) attribute = attribute.data;
    if (attribute.isGLBufferAttribute) {
      const cached = buffers.get(attribute);
      if (!cached || cached.version < attribute.version) {
        buffers.set(attribute, {
          buffer: attribute.buffer,
          type: attribute.type,
          bytesPerElement: attribute.elementSize,
          version: attribute.version
        });
      }
      return;
    }
    const data = buffers.get(attribute);
    if (data === void 0) {
      buffers.set(attribute, createBuffer(attribute, bufferType));
    } else if (data.version < attribute.version) {
      if (data.size !== attribute.array.byteLength) {
        throw new Error("THREE.WebGLAttributes: The size of the buffer attribute's array buffer does not match the original size. Resizing buffer attributes is not supported.");
      }
      updateBuffer(data.buffer, attribute, bufferType);
      data.version = attribute.version;
    }
  }
  __name(update, "update");
  return {
    get,
    remove,
    update
  };
}
__name(WebGLAttributes, "WebGLAttributes");
class PlaneGeometry extends BufferGeometry {
  static {
    __name(this, "PlaneGeometry");
  }
  constructor(width = 1, height = 1, widthSegments = 1, heightSegments = 1) {
    super();
    this.type = "PlaneGeometry";
    this.parameters = {
      width,
      height,
      widthSegments,
      heightSegments
    };
    const width_half = width / 2;
    const height_half = height / 2;
    const gridX = Math.floor(widthSegments);
    const gridY = Math.floor(heightSegments);
    const gridX1 = gridX + 1;
    const gridY1 = gridY + 1;
    const segment_width = width / gridX;
    const segment_height = height / gridY;
    const indices = [];
    const vertices = [];
    const normals = [];
    const uvs = [];
    for (let iy = 0; iy < gridY1; iy++) {
      const y = iy * segment_height - height_half;
      for (let ix = 0; ix < gridX1; ix++) {
        const x = ix * segment_width - width_half;
        vertices.push(x, -y, 0);
        normals.push(0, 0, 1);
        uvs.push(ix / gridX);
        uvs.push(1 - iy / gridY);
      }
    }
    for (let iy = 0; iy < gridY; iy++) {
      for (let ix = 0; ix < gridX; ix++) {
        const a = ix + gridX1 * iy;
        const b = ix + gridX1 * (iy + 1);
        const c = ix + 1 + gridX1 * (iy + 1);
        const d = ix + 1 + gridX1 * iy;
        indices.push(a, b, d);
        indices.push(b, c, d);
      }
    }
    this.setIndex(indices);
    this.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    this.setAttribute("normal", new Float32BufferAttribute(normals, 3));
    this.setAttribute("uv", new Float32BufferAttribute(uvs, 2));
  }
  copy(source) {
    super.copy(source);
    this.parameters = Object.assign({}, source.parameters);
    return this;
  }
  static fromJSON(data) {
    return new PlaneGeometry(data.width, data.height, data.widthSegments, data.heightSegments);
  }
}
var alphahash_fragment = "#ifdef USE_ALPHAHASH\n	if ( diffuseColor.a < getAlphaHashThreshold( vPosition ) ) discard;\n#endif";
var alphahash_pars_fragment = "#ifdef USE_ALPHAHASH\n	const float ALPHA_HASH_SCALE = 0.05;\n	float hash2D( vec2 value ) {\n		return fract( 1.0e4 * sin( 17.0 * value.x + 0.1 * value.y ) * ( 0.1 + abs( sin( 13.0 * value.y + value.x ) ) ) );\n	}\n	float hash3D( vec3 value ) {\n		return hash2D( vec2( hash2D( value.xy ), value.z ) );\n	}\n	float getAlphaHashThreshold( vec3 position ) {\n		float maxDeriv = max(\n			length( dFdx( position.xyz ) ),\n			length( dFdy( position.xyz ) )\n		);\n		float pixScale = 1.0 / ( ALPHA_HASH_SCALE * maxDeriv );\n		vec2 pixScales = vec2(\n			exp2( floor( log2( pixScale ) ) ),\n			exp2( ceil( log2( pixScale ) ) )\n		);\n		vec2 alpha = vec2(\n			hash3D( floor( pixScales.x * position.xyz ) ),\n			hash3D( floor( pixScales.y * position.xyz ) )\n		);\n		float lerpFactor = fract( log2( pixScale ) );\n		float x = ( 1.0 - lerpFactor ) * alpha.x + lerpFactor * alpha.y;\n		float a = min( lerpFactor, 1.0 - lerpFactor );\n		vec3 cases = vec3(\n			x * x / ( 2.0 * a * ( 1.0 - a ) ),\n			( x - 0.5 * a ) / ( 1.0 - a ),\n			1.0 - ( ( 1.0 - x ) * ( 1.0 - x ) / ( 2.0 * a * ( 1.0 - a ) ) )\n		);\n		float threshold = ( x < ( 1.0 - a ) )\n			? ( ( x < a ) ? cases.x : cases.y )\n			: cases.z;\n		return clamp( threshold , 1.0e-6, 1.0 );\n	}\n#endif";
var alphamap_fragment = "#ifdef USE_ALPHAMAP\n	diffuseColor.a *= texture2D( alphaMap, vAlphaMapUv ).g;\n#endif";
var alphamap_pars_fragment = "#ifdef USE_ALPHAMAP\n	uniform sampler2D alphaMap;\n#endif";
var alphatest_fragment = "#ifdef USE_ALPHATEST\n	#ifdef ALPHA_TO_COVERAGE\n	diffuseColor.a = smoothstep( alphaTest, alphaTest + fwidth( diffuseColor.a ), diffuseColor.a );\n	if ( diffuseColor.a == 0.0 ) discard;\n	#else\n	if ( diffuseColor.a < alphaTest ) discard;\n	#endif\n#endif";
var alphatest_pars_fragment = "#ifdef USE_ALPHATEST\n	uniform float alphaTest;\n#endif";
var aomap_fragment = "#ifdef USE_AOMAP\n	float ambientOcclusion = ( texture2D( aoMap, vAoMapUv ).r - 1.0 ) * aoMapIntensity + 1.0;\n	reflectedLight.indirectDiffuse *= ambientOcclusion;\n	#if defined( USE_CLEARCOAT ) \n		clearcoatSpecularIndirect *= ambientOcclusion;\n	#endif\n	#if defined( USE_SHEEN ) \n		sheenSpecularIndirect *= ambientOcclusion;\n	#endif\n	#if defined( USE_ENVMAP ) && defined( STANDARD )\n		float dotNV = saturate( dot( geometryNormal, geometryViewDir ) );\n		reflectedLight.indirectSpecular *= computeSpecularOcclusion( dotNV, ambientOcclusion, material.roughness );\n	#endif\n#endif";
var aomap_pars_fragment = "#ifdef USE_AOMAP\n	uniform sampler2D aoMap;\n	uniform float aoMapIntensity;\n#endif";
var batching_pars_vertex = "#ifdef USE_BATCHING\n	#if ! defined( GL_ANGLE_multi_draw )\n	#define gl_DrawID _gl_DrawID\n	uniform int _gl_DrawID;\n	#endif\n	uniform highp sampler2D batchingTexture;\n	uniform highp usampler2D batchingIdTexture;\n	mat4 getBatchingMatrix( const in float i ) {\n		int size = textureSize( batchingTexture, 0 ).x;\n		int j = int( i ) * 4;\n		int x = j % size;\n		int y = j / size;\n		vec4 v1 = texelFetch( batchingTexture, ivec2( x, y ), 0 );\n		vec4 v2 = texelFetch( batchingTexture, ivec2( x + 1, y ), 0 );\n		vec4 v3 = texelFetch( batchingTexture, ivec2( x + 2, y ), 0 );\n		vec4 v4 = texelFetch( batchingTexture, ivec2( x + 3, y ), 0 );\n		return mat4( v1, v2, v3, v4 );\n	}\n	float getIndirectIndex( const in int i ) {\n		int size = textureSize( batchingIdTexture, 0 ).x;\n		int x = i % size;\n		int y = i / size;\n		return float( texelFetch( batchingIdTexture, ivec2( x, y ), 0 ).r );\n	}\n#endif\n#ifdef USE_BATCHING_COLOR\n	uniform sampler2D batchingColorTexture;\n	vec3 getBatchingColor( const in float i ) {\n		int size = textureSize( batchingColorTexture, 0 ).x;\n		int j = int( i );\n		int x = j % size;\n		int y = j / size;\n		return texelFetch( batchingColorTexture, ivec2( x, y ), 0 ).rgb;\n	}\n#endif";
var batching_vertex = "#ifdef USE_BATCHING\n	mat4 batchingMatrix = getBatchingMatrix( getIndirectIndex( gl_DrawID ) );\n#endif";
var begin_vertex = "vec3 transformed = vec3( position );\n#ifdef USE_ALPHAHASH\n	vPosition = vec3( position );\n#endif";
var beginnormal_vertex = "vec3 objectNormal = vec3( normal );\n#ifdef USE_TANGENT\n	vec3 objectTangent = vec3( tangent.xyz );\n#endif";
var bsdfs = "float G_BlinnPhong_Implicit( ) {\n	return 0.25;\n}\nfloat D_BlinnPhong( const in float shininess, const in float dotNH ) {\n	return RECIPROCAL_PI * ( shininess * 0.5 + 1.0 ) * pow( dotNH, shininess );\n}\nvec3 BRDF_BlinnPhong( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in vec3 specularColor, const in float shininess ) {\n	vec3 halfDir = normalize( lightDir + viewDir );\n	float dotNH = saturate( dot( normal, halfDir ) );\n	float dotVH = saturate( dot( viewDir, halfDir ) );\n	vec3 F = F_Schlick( specularColor, 1.0, dotVH );\n	float G = G_BlinnPhong_Implicit( );\n	float D = D_BlinnPhong( shininess, dotNH );\n	return F * ( G * D );\n} // validated";
var iridescence_fragment = "#ifdef USE_IRIDESCENCE\n	const mat3 XYZ_TO_REC709 = mat3(\n		 3.2404542, -0.9692660,  0.0556434,\n		-1.5371385,  1.8760108, -0.2040259,\n		-0.4985314,  0.0415560,  1.0572252\n	);\n	vec3 Fresnel0ToIor( vec3 fresnel0 ) {\n		vec3 sqrtF0 = sqrt( fresnel0 );\n		return ( vec3( 1.0 ) + sqrtF0 ) / ( vec3( 1.0 ) - sqrtF0 );\n	}\n	vec3 IorToFresnel0( vec3 transmittedIor, float incidentIor ) {\n		return pow2( ( transmittedIor - vec3( incidentIor ) ) / ( transmittedIor + vec3( incidentIor ) ) );\n	}\n	float IorToFresnel0( float transmittedIor, float incidentIor ) {\n		return pow2( ( transmittedIor - incidentIor ) / ( transmittedIor + incidentIor ));\n	}\n	vec3 evalSensitivity( float OPD, vec3 shift ) {\n		float phase = 2.0 * PI * OPD * 1.0e-9;\n		vec3 val = vec3( 5.4856e-13, 4.4201e-13, 5.2481e-13 );\n		vec3 pos = vec3( 1.6810e+06, 1.7953e+06, 2.2084e+06 );\n		vec3 var = vec3( 4.3278e+09, 9.3046e+09, 6.6121e+09 );\n		vec3 xyz = val * sqrt( 2.0 * PI * var ) * cos( pos * phase + shift ) * exp( - pow2( phase ) * var );\n		xyz.x += 9.7470e-14 * sqrt( 2.0 * PI * 4.5282e+09 ) * cos( 2.2399e+06 * phase + shift[ 0 ] ) * exp( - 4.5282e+09 * pow2( phase ) );\n		xyz /= 1.0685e-7;\n		vec3 rgb = XYZ_TO_REC709 * xyz;\n		return rgb;\n	}\n	vec3 evalIridescence( float outsideIOR, float eta2, float cosTheta1, float thinFilmThickness, vec3 baseF0 ) {\n		vec3 I;\n		float iridescenceIOR = mix( outsideIOR, eta2, smoothstep( 0.0, 0.03, thinFilmThickness ) );\n		float sinTheta2Sq = pow2( outsideIOR / iridescenceIOR ) * ( 1.0 - pow2( cosTheta1 ) );\n		float cosTheta2Sq = 1.0 - sinTheta2Sq;\n		if ( cosTheta2Sq < 0.0 ) {\n			return vec3( 1.0 );\n		}\n		float cosTheta2 = sqrt( cosTheta2Sq );\n		float R0 = IorToFresnel0( iridescenceIOR, outsideIOR );\n		float R12 = F_Schlick( R0, 1.0, cosTheta1 );\n		float T121 = 1.0 - R12;\n		float phi12 = 0.0;\n		if ( iridescenceIOR < outsideIOR ) phi12 = PI;\n		float phi21 = PI - phi12;\n		vec3 baseIOR = Fresnel0ToIor( clamp( baseF0, 0.0, 0.9999 ) );		vec3 R1 = IorToFresnel0( baseIOR, iridescenceIOR );\n		vec3 R23 = F_Schlick( R1, 1.0, cosTheta2 );\n		vec3 phi23 = vec3( 0.0 );\n		if ( baseIOR[ 0 ] < iridescenceIOR ) phi23[ 0 ] = PI;\n		if ( baseIOR[ 1 ] < iridescenceIOR ) phi23[ 1 ] = PI;\n		if ( baseIOR[ 2 ] < iridescenceIOR ) phi23[ 2 ] = PI;\n		float OPD = 2.0 * iridescenceIOR * thinFilmThickness * cosTheta2;\n		vec3 phi = vec3( phi21 ) + phi23;\n		vec3 R123 = clamp( R12 * R23, 1e-5, 0.9999 );\n		vec3 r123 = sqrt( R123 );\n		vec3 Rs = pow2( T121 ) * R23 / ( vec3( 1.0 ) - R123 );\n		vec3 C0 = R12 + Rs;\n		I = C0;\n		vec3 Cm = Rs - T121;\n		for ( int m = 1; m <= 2; ++ m ) {\n			Cm *= r123;\n			vec3 Sm = 2.0 * evalSensitivity( float( m ) * OPD, float( m ) * phi );\n			I += Cm * Sm;\n		}\n		return max( I, vec3( 0.0 ) );\n	}\n#endif";
var bumpmap_pars_fragment = "#ifdef USE_BUMPMAP\n	uniform sampler2D bumpMap;\n	uniform float bumpScale;\n	vec2 dHdxy_fwd() {\n		vec2 dSTdx = dFdx( vBumpMapUv );\n		vec2 dSTdy = dFdy( vBumpMapUv );\n		float Hll = bumpScale * texture2D( bumpMap, vBumpMapUv ).x;\n		float dBx = bumpScale * texture2D( bumpMap, vBumpMapUv + dSTdx ).x - Hll;\n		float dBy = bumpScale * texture2D( bumpMap, vBumpMapUv + dSTdy ).x - Hll;\n		return vec2( dBx, dBy );\n	}\n	vec3 perturbNormalArb( vec3 surf_pos, vec3 surf_norm, vec2 dHdxy, float faceDirection ) {\n		vec3 vSigmaX = normalize( dFdx( surf_pos.xyz ) );\n		vec3 vSigmaY = normalize( dFdy( surf_pos.xyz ) );\n		vec3 vN = surf_norm;\n		vec3 R1 = cross( vSigmaY, vN );\n		vec3 R2 = cross( vN, vSigmaX );\n		float fDet = dot( vSigmaX, R1 ) * faceDirection;\n		vec3 vGrad = sign( fDet ) * ( dHdxy.x * R1 + dHdxy.y * R2 );\n		return normalize( abs( fDet ) * surf_norm - vGrad );\n	}\n#endif";
var clipping_planes_fragment = "#if NUM_CLIPPING_PLANES > 0\n	vec4 plane;\n	#ifdef ALPHA_TO_COVERAGE\n		float distanceToPlane, distanceGradient;\n		float clipOpacity = 1.0;\n		#pragma unroll_loop_start\n		for ( int i = 0; i < UNION_CLIPPING_PLANES; i ++ ) {\n			plane = clippingPlanes[ i ];\n			distanceToPlane = - dot( vClipPosition, plane.xyz ) + plane.w;\n			distanceGradient = fwidth( distanceToPlane ) / 2.0;\n			clipOpacity *= smoothstep( - distanceGradient, distanceGradient, distanceToPlane );\n			if ( clipOpacity == 0.0 ) discard;\n		}\n		#pragma unroll_loop_end\n		#if UNION_CLIPPING_PLANES < NUM_CLIPPING_PLANES\n			float unionClipOpacity = 1.0;\n			#pragma unroll_loop_start\n			for ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; i ++ ) {\n				plane = clippingPlanes[ i ];\n				distanceToPlane = - dot( vClipPosition, plane.xyz ) + plane.w;\n				distanceGradient = fwidth( distanceToPlane ) / 2.0;\n				unionClipOpacity *= 1.0 - smoothstep( - distanceGradient, distanceGradient, distanceToPlane );\n			}\n			#pragma unroll_loop_end\n			clipOpacity *= 1.0 - unionClipOpacity;\n		#endif\n		diffuseColor.a *= clipOpacity;\n		if ( diffuseColor.a == 0.0 ) discard;\n	#else\n		#pragma unroll_loop_start\n		for ( int i = 0; i < UNION_CLIPPING_PLANES; i ++ ) {\n			plane = clippingPlanes[ i ];\n			if ( dot( vClipPosition, plane.xyz ) > plane.w ) discard;\n		}\n		#pragma unroll_loop_end\n		#if UNION_CLIPPING_PLANES < NUM_CLIPPING_PLANES\n			bool clipped = true;\n			#pragma unroll_loop_start\n			for ( int i = UNION_CLIPPING_PLANES; i < NUM_CLIPPING_PLANES; i ++ ) {\n				plane = clippingPlanes[ i ];\n				clipped = ( dot( vClipPosition, plane.xyz ) > plane.w ) && clipped;\n			}\n			#pragma unroll_loop_end\n			if ( clipped ) discard;\n		#endif\n	#endif\n#endif";
var clipping_planes_pars_fragment = "#if NUM_CLIPPING_PLANES > 0\n	varying vec3 vClipPosition;\n	uniform vec4 clippingPlanes[ NUM_CLIPPING_PLANES ];\n#endif";
var clipping_planes_pars_vertex = "#if NUM_CLIPPING_PLANES > 0\n	varying vec3 vClipPosition;\n#endif";
var clipping_planes_vertex = "#if NUM_CLIPPING_PLANES > 0\n	vClipPosition = - mvPosition.xyz;\n#endif";
var color_fragment = "#if defined( USE_COLOR_ALPHA )\n	diffuseColor *= vColor;\n#elif defined( USE_COLOR )\n	diffuseColor.rgb *= vColor;\n#endif";
var color_pars_fragment = "#if defined( USE_COLOR_ALPHA )\n	varying vec4 vColor;\n#elif defined( USE_COLOR )\n	varying vec3 vColor;\n#endif";
var color_pars_vertex = "#if defined( USE_COLOR_ALPHA )\n	varying vec4 vColor;\n#elif defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR ) || defined( USE_BATCHING_COLOR )\n	varying vec3 vColor;\n#endif";
var color_vertex = "#if defined( USE_COLOR_ALPHA )\n	vColor = vec4( 1.0 );\n#elif defined( USE_COLOR ) || defined( USE_INSTANCING_COLOR ) || defined( USE_BATCHING_COLOR )\n	vColor = vec3( 1.0 );\n#endif\n#ifdef USE_COLOR\n	vColor *= color;\n#endif\n#ifdef USE_INSTANCING_COLOR\n	vColor.xyz *= instanceColor.xyz;\n#endif\n#ifdef USE_BATCHING_COLOR\n	vec3 batchingColor = getBatchingColor( getIndirectIndex( gl_DrawID ) );\n	vColor.xyz *= batchingColor.xyz;\n#endif";
var common = "#define PI 3.141592653589793\n#define PI2 6.283185307179586\n#define PI_HALF 1.5707963267948966\n#define RECIPROCAL_PI 0.3183098861837907\n#define RECIPROCAL_PI2 0.15915494309189535\n#define EPSILON 1e-6\n#ifndef saturate\n#define saturate( a ) clamp( a, 0.0, 1.0 )\n#endif\n#define whiteComplement( a ) ( 1.0 - saturate( a ) )\nfloat pow2( const in float x ) { return x*x; }\nvec3 pow2( const in vec3 x ) { return x*x; }\nfloat pow3( const in float x ) { return x*x*x; }\nfloat pow4( const in float x ) { float x2 = x*x; return x2*x2; }\nfloat max3( const in vec3 v ) { return max( max( v.x, v.y ), v.z ); }\nfloat average( const in vec3 v ) { return dot( v, vec3( 0.3333333 ) ); }\nhighp float rand( const in vec2 uv ) {\n	const highp float a = 12.9898, b = 78.233, c = 43758.5453;\n	highp float dt = dot( uv.xy, vec2( a,b ) ), sn = mod( dt, PI );\n	return fract( sin( sn ) * c );\n}\n#ifdef HIGH_PRECISION\n	float precisionSafeLength( vec3 v ) { return length( v ); }\n#else\n	float precisionSafeLength( vec3 v ) {\n		float maxComponent = max3( abs( v ) );\n		return length( v / maxComponent ) * maxComponent;\n	}\n#endif\nstruct IncidentLight {\n	vec3 color;\n	vec3 direction;\n	bool visible;\n};\nstruct ReflectedLight {\n	vec3 directDiffuse;\n	vec3 directSpecular;\n	vec3 indirectDiffuse;\n	vec3 indirectSpecular;\n};\n#ifdef USE_ALPHAHASH\n	varying vec3 vPosition;\n#endif\nvec3 transformDirection( in vec3 dir, in mat4 matrix ) {\n	return normalize( ( matrix * vec4( dir, 0.0 ) ).xyz );\n}\nvec3 inverseTransformDirection( in vec3 dir, in mat4 matrix ) {\n	return normalize( ( vec4( dir, 0.0 ) * matrix ).xyz );\n}\nmat3 transposeMat3( const in mat3 m ) {\n	mat3 tmp;\n	tmp[ 0 ] = vec3( m[ 0 ].x, m[ 1 ].x, m[ 2 ].x );\n	tmp[ 1 ] = vec3( m[ 0 ].y, m[ 1 ].y, m[ 2 ].y );\n	tmp[ 2 ] = vec3( m[ 0 ].z, m[ 1 ].z, m[ 2 ].z );\n	return tmp;\n}\nbool isPerspectiveMatrix( mat4 m ) {\n	return m[ 2 ][ 3 ] == - 1.0;\n}\nvec2 equirectUv( in vec3 dir ) {\n	float u = atan( dir.z, dir.x ) * RECIPROCAL_PI2 + 0.5;\n	float v = asin( clamp( dir.y, - 1.0, 1.0 ) ) * RECIPROCAL_PI + 0.5;\n	return vec2( u, v );\n}\nvec3 BRDF_Lambert( const in vec3 diffuseColor ) {\n	return RECIPROCAL_PI * diffuseColor;\n}\nvec3 F_Schlick( const in vec3 f0, const in float f90, const in float dotVH ) {\n	float fresnel = exp2( ( - 5.55473 * dotVH - 6.98316 ) * dotVH );\n	return f0 * ( 1.0 - fresnel ) + ( f90 * fresnel );\n}\nfloat F_Schlick( const in float f0, const in float f90, const in float dotVH ) {\n	float fresnel = exp2( ( - 5.55473 * dotVH - 6.98316 ) * dotVH );\n	return f0 * ( 1.0 - fresnel ) + ( f90 * fresnel );\n} // validated";
var cube_uv_reflection_fragment = "#ifdef ENVMAP_TYPE_CUBE_UV\n	#define cubeUV_minMipLevel 4.0\n	#define cubeUV_minTileSize 16.0\n	float getFace( vec3 direction ) {\n		vec3 absDirection = abs( direction );\n		float face = - 1.0;\n		if ( absDirection.x > absDirection.z ) {\n			if ( absDirection.x > absDirection.y )\n				face = direction.x > 0.0 ? 0.0 : 3.0;\n			else\n				face = direction.y > 0.0 ? 1.0 : 4.0;\n		} else {\n			if ( absDirection.z > absDirection.y )\n				face = direction.z > 0.0 ? 2.0 : 5.0;\n			else\n				face = direction.y > 0.0 ? 1.0 : 4.0;\n		}\n		return face;\n	}\n	vec2 getUV( vec3 direction, float face ) {\n		vec2 uv;\n		if ( face == 0.0 ) {\n			uv = vec2( direction.z, direction.y ) / abs( direction.x );\n		} else if ( face == 1.0 ) {\n			uv = vec2( - direction.x, - direction.z ) / abs( direction.y );\n		} else if ( face == 2.0 ) {\n			uv = vec2( - direction.x, direction.y ) / abs( direction.z );\n		} else if ( face == 3.0 ) {\n			uv = vec2( - direction.z, direction.y ) / abs( direction.x );\n		} else if ( face == 4.0 ) {\n			uv = vec2( - direction.x, direction.z ) / abs( direction.y );\n		} else {\n			uv = vec2( direction.x, direction.y ) / abs( direction.z );\n		}\n		return 0.5 * ( uv + 1.0 );\n	}\n	vec3 bilinearCubeUV( sampler2D envMap, vec3 direction, float mipInt ) {\n		float face = getFace( direction );\n		float filterInt = max( cubeUV_minMipLevel - mipInt, 0.0 );\n		mipInt = max( mipInt, cubeUV_minMipLevel );\n		float faceSize = exp2( mipInt );\n		highp vec2 uv = getUV( direction, face ) * ( faceSize - 2.0 ) + 1.0;\n		if ( face > 2.0 ) {\n			uv.y += faceSize;\n			face -= 3.0;\n		}\n		uv.x += face * faceSize;\n		uv.x += filterInt * 3.0 * cubeUV_minTileSize;\n		uv.y += 4.0 * ( exp2( CUBEUV_MAX_MIP ) - faceSize );\n		uv.x *= CUBEUV_TEXEL_WIDTH;\n		uv.y *= CUBEUV_TEXEL_HEIGHT;\n		#ifdef texture2DGradEXT\n			return texture2DGradEXT( envMap, uv, vec2( 0.0 ), vec2( 0.0 ) ).rgb;\n		#else\n			return texture2D( envMap, uv ).rgb;\n		#endif\n	}\n	#define cubeUV_r0 1.0\n	#define cubeUV_m0 - 2.0\n	#define cubeUV_r1 0.8\n	#define cubeUV_m1 - 1.0\n	#define cubeUV_r4 0.4\n	#define cubeUV_m4 2.0\n	#define cubeUV_r5 0.305\n	#define cubeUV_m5 3.0\n	#define cubeUV_r6 0.21\n	#define cubeUV_m6 4.0\n	float roughnessToMip( float roughness ) {\n		float mip = 0.0;\n		if ( roughness >= cubeUV_r1 ) {\n			mip = ( cubeUV_r0 - roughness ) * ( cubeUV_m1 - cubeUV_m0 ) / ( cubeUV_r0 - cubeUV_r1 ) + cubeUV_m0;\n		} else if ( roughness >= cubeUV_r4 ) {\n			mip = ( cubeUV_r1 - roughness ) * ( cubeUV_m4 - cubeUV_m1 ) / ( cubeUV_r1 - cubeUV_r4 ) + cubeUV_m1;\n		} else if ( roughness >= cubeUV_r5 ) {\n			mip = ( cubeUV_r4 - roughness ) * ( cubeUV_m5 - cubeUV_m4 ) / ( cubeUV_r4 - cubeUV_r5 ) + cubeUV_m4;\n		} else if ( roughness >= cubeUV_r6 ) {\n			mip = ( cubeUV_r5 - roughness ) * ( cubeUV_m6 - cubeUV_m5 ) / ( cubeUV_r5 - cubeUV_r6 ) + cubeUV_m5;\n		} else {\n			mip = - 2.0 * log2( 1.16 * roughness );		}\n		return mip;\n	}\n	vec4 textureCubeUV( sampler2D envMap, vec3 sampleDir, float roughness ) {\n		float mip = clamp( roughnessToMip( roughness ), cubeUV_m0, CUBEUV_MAX_MIP );\n		float mipF = fract( mip );\n		float mipInt = floor( mip );\n		vec3 color0 = bilinearCubeUV( envMap, sampleDir, mipInt );\n		if ( mipF == 0.0 ) {\n			return vec4( color0, 1.0 );\n		} else {\n			vec3 color1 = bilinearCubeUV( envMap, sampleDir, mipInt + 1.0 );\n			return vec4( mix( color0, color1, mipF ), 1.0 );\n		}\n	}\n#endif";
var defaultnormal_vertex = "vec3 transformedNormal = objectNormal;\n#ifdef USE_TANGENT\n	vec3 transformedTangent = objectTangent;\n#endif\n#ifdef USE_BATCHING\n	mat3 bm = mat3( batchingMatrix );\n	transformedNormal /= vec3( dot( bm[ 0 ], bm[ 0 ] ), dot( bm[ 1 ], bm[ 1 ] ), dot( bm[ 2 ], bm[ 2 ] ) );\n	transformedNormal = bm * transformedNormal;\n	#ifdef USE_TANGENT\n		transformedTangent = bm * transformedTangent;\n	#endif\n#endif\n#ifdef USE_INSTANCING\n	mat3 im = mat3( instanceMatrix );\n	transformedNormal /= vec3( dot( im[ 0 ], im[ 0 ] ), dot( im[ 1 ], im[ 1 ] ), dot( im[ 2 ], im[ 2 ] ) );\n	transformedNormal = im * transformedNormal;\n	#ifdef USE_TANGENT\n		transformedTangent = im * transformedTangent;\n	#endif\n#endif\ntransformedNormal = normalMatrix * transformedNormal;\n#ifdef FLIP_SIDED\n	transformedNormal = - transformedNormal;\n#endif\n#ifdef USE_TANGENT\n	transformedTangent = ( modelViewMatrix * vec4( transformedTangent, 0.0 ) ).xyz;\n	#ifdef FLIP_SIDED\n		transformedTangent = - transformedTangent;\n	#endif\n#endif";
var displacementmap_pars_vertex = "#ifdef USE_DISPLACEMENTMAP\n	uniform sampler2D displacementMap;\n	uniform float displacementScale;\n	uniform float displacementBias;\n#endif";
var displacementmap_vertex = "#ifdef USE_DISPLACEMENTMAP\n	transformed += normalize( objectNormal ) * ( texture2D( displacementMap, vDisplacementMapUv ).x * displacementScale + displacementBias );\n#endif";
var emissivemap_fragment = "#ifdef USE_EMISSIVEMAP\n	vec4 emissiveColor = texture2D( emissiveMap, vEmissiveMapUv );\n	#ifdef DECODE_VIDEO_TEXTURE_EMISSIVE\n		emissiveColor = sRGBTransferEOTF( emissiveColor );\n	#endif\n	totalEmissiveRadiance *= emissiveColor.rgb;\n#endif";
var emissivemap_pars_fragment = "#ifdef USE_EMISSIVEMAP\n	uniform sampler2D emissiveMap;\n#endif";
var colorspace_fragment = "gl_FragColor = linearToOutputTexel( gl_FragColor );";
var colorspace_pars_fragment = "vec4 LinearTransferOETF( in vec4 value ) {\n	return value;\n}\nvec4 sRGBTransferEOTF( in vec4 value ) {\n	return vec4( mix( pow( value.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), value.rgb * 0.0773993808, vec3( lessThanEqual( value.rgb, vec3( 0.04045 ) ) ) ), value.a );\n}\nvec4 sRGBTransferOETF( in vec4 value ) {\n	return vec4( mix( pow( value.rgb, vec3( 0.41666 ) ) * 1.055 - vec3( 0.055 ), value.rgb * 12.92, vec3( lessThanEqual( value.rgb, vec3( 0.0031308 ) ) ) ), value.a );\n}";
var envmap_fragment = "#ifdef USE_ENVMAP\n	#ifdef ENV_WORLDPOS\n		vec3 cameraToFrag;\n		if ( isOrthographic ) {\n			cameraToFrag = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\n		} else {\n			cameraToFrag = normalize( vWorldPosition - cameraPosition );\n		}\n		vec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n		#ifdef ENVMAP_MODE_REFLECTION\n			vec3 reflectVec = reflect( cameraToFrag, worldNormal );\n		#else\n			vec3 reflectVec = refract( cameraToFrag, worldNormal, refractionRatio );\n		#endif\n	#else\n		vec3 reflectVec = vReflect;\n	#endif\n	#ifdef ENVMAP_TYPE_CUBE\n		vec4 envColor = textureCube( envMap, envMapRotation * vec3( flipEnvMap * reflectVec.x, reflectVec.yz ) );\n	#else\n		vec4 envColor = vec4( 0.0 );\n	#endif\n	#ifdef ENVMAP_BLENDING_MULTIPLY\n		outgoingLight = mix( outgoingLight, outgoingLight * envColor.xyz, specularStrength * reflectivity );\n	#elif defined( ENVMAP_BLENDING_MIX )\n		outgoingLight = mix( outgoingLight, envColor.xyz, specularStrength * reflectivity );\n	#elif defined( ENVMAP_BLENDING_ADD )\n		outgoingLight += envColor.xyz * specularStrength * reflectivity;\n	#endif\n#endif";
var envmap_common_pars_fragment = "#ifdef USE_ENVMAP\n	uniform float envMapIntensity;\n	uniform float flipEnvMap;\n	uniform mat3 envMapRotation;\n	#ifdef ENVMAP_TYPE_CUBE\n		uniform samplerCube envMap;\n	#else\n		uniform sampler2D envMap;\n	#endif\n	\n#endif";
var envmap_pars_fragment = "#ifdef USE_ENVMAP\n	uniform float reflectivity;\n	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) || defined( LAMBERT )\n		#define ENV_WORLDPOS\n	#endif\n	#ifdef ENV_WORLDPOS\n		varying vec3 vWorldPosition;\n		uniform float refractionRatio;\n	#else\n		varying vec3 vReflect;\n	#endif\n#endif";
var envmap_pars_vertex = "#ifdef USE_ENVMAP\n	#if defined( USE_BUMPMAP ) || defined( USE_NORMALMAP ) || defined( PHONG ) || defined( LAMBERT )\n		#define ENV_WORLDPOS\n	#endif\n	#ifdef ENV_WORLDPOS\n		\n		varying vec3 vWorldPosition;\n	#else\n		varying vec3 vReflect;\n		uniform float refractionRatio;\n	#endif\n#endif";
var envmap_vertex = "#ifdef USE_ENVMAP\n	#ifdef ENV_WORLDPOS\n		vWorldPosition = worldPosition.xyz;\n	#else\n		vec3 cameraToVertex;\n		if ( isOrthographic ) {\n			cameraToVertex = normalize( vec3( - viewMatrix[ 0 ][ 2 ], - viewMatrix[ 1 ][ 2 ], - viewMatrix[ 2 ][ 2 ] ) );\n		} else {\n			cameraToVertex = normalize( worldPosition.xyz - cameraPosition );\n		}\n		vec3 worldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n		#ifdef ENVMAP_MODE_REFLECTION\n			vReflect = reflect( cameraToVertex, worldNormal );\n		#else\n			vReflect = refract( cameraToVertex, worldNormal, refractionRatio );\n		#endif\n	#endif\n#endif";
var fog_vertex = "#ifdef USE_FOG\n	vFogDepth = - mvPosition.z;\n#endif";
var fog_pars_vertex = "#ifdef USE_FOG\n	varying float vFogDepth;\n#endif";
var fog_fragment = "#ifdef USE_FOG\n	#ifdef FOG_EXP2\n		float fogFactor = 1.0 - exp( - fogDensity * fogDensity * vFogDepth * vFogDepth );\n	#else\n		float fogFactor = smoothstep( fogNear, fogFar, vFogDepth );\n	#endif\n	gl_FragColor.rgb = mix( gl_FragColor.rgb, fogColor, fogFactor );\n#endif";
var fog_pars_fragment = "#ifdef USE_FOG\n	uniform vec3 fogColor;\n	varying float vFogDepth;\n	#ifdef FOG_EXP2\n		uniform float fogDensity;\n	#else\n		uniform float fogNear;\n		uniform float fogFar;\n	#endif\n#endif";
var gradientmap_pars_fragment = "#ifdef USE_GRADIENTMAP\n	uniform sampler2D gradientMap;\n#endif\nvec3 getGradientIrradiance( vec3 normal, vec3 lightDirection ) {\n	float dotNL = dot( normal, lightDirection );\n	vec2 coord = vec2( dotNL * 0.5 + 0.5, 0.0 );\n	#ifdef USE_GRADIENTMAP\n		return vec3( texture2D( gradientMap, coord ).r );\n	#else\n		vec2 fw = fwidth( coord ) * 0.5;\n		return mix( vec3( 0.7 ), vec3( 1.0 ), smoothstep( 0.7 - fw.x, 0.7 + fw.x, coord.x ) );\n	#endif\n}";
var lightmap_pars_fragment = "#ifdef USE_LIGHTMAP\n	uniform sampler2D lightMap;\n	uniform float lightMapIntensity;\n#endif";
var lights_lambert_fragment = "LambertMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;\nmaterial.specularStrength = specularStrength;";
var lights_lambert_pars_fragment = "varying vec3 vViewPosition;\nstruct LambertMaterial {\n	vec3 diffuseColor;\n	float specularStrength;\n};\nvoid RE_Direct_Lambert( const in IncidentLight directLight, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in LambertMaterial material, inout ReflectedLight reflectedLight ) {\n	float dotNL = saturate( dot( geometryNormal, directLight.direction ) );\n	vec3 irradiance = dotNL * directLight.color;\n	reflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Lambert( const in vec3 irradiance, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in LambertMaterial material, inout ReflectedLight reflectedLight ) {\n	reflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\n#define RE_Direct				RE_Direct_Lambert\n#define RE_IndirectDiffuse		RE_IndirectDiffuse_Lambert";
var lights_pars_begin = "uniform bool receiveShadow;\nuniform vec3 ambientLightColor;\n#if defined( USE_LIGHT_PROBES )\n	uniform vec3 lightProbe[ 9 ];\n#endif\nvec3 shGetIrradianceAt( in vec3 normal, in vec3 shCoefficients[ 9 ] ) {\n	float x = normal.x, y = normal.y, z = normal.z;\n	vec3 result = shCoefficients[ 0 ] * 0.886227;\n	result += shCoefficients[ 1 ] * 2.0 * 0.511664 * y;\n	result += shCoefficients[ 2 ] * 2.0 * 0.511664 * z;\n	result += shCoefficients[ 3 ] * 2.0 * 0.511664 * x;\n	result += shCoefficients[ 4 ] * 2.0 * 0.429043 * x * y;\n	result += shCoefficients[ 5 ] * 2.0 * 0.429043 * y * z;\n	result += shCoefficients[ 6 ] * ( 0.743125 * z * z - 0.247708 );\n	result += shCoefficients[ 7 ] * 2.0 * 0.429043 * x * z;\n	result += shCoefficients[ 8 ] * 0.429043 * ( x * x - y * y );\n	return result;\n}\nvec3 getLightProbeIrradiance( const in vec3 lightProbe[ 9 ], const in vec3 normal ) {\n	vec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n	vec3 irradiance = shGetIrradianceAt( worldNormal, lightProbe );\n	return irradiance;\n}\nvec3 getAmbientLightIrradiance( const in vec3 ambientLightColor ) {\n	vec3 irradiance = ambientLightColor;\n	return irradiance;\n}\nfloat getDistanceAttenuation( const in float lightDistance, const in float cutoffDistance, const in float decayExponent ) {\n	float distanceFalloff = 1.0 / max( pow( lightDistance, decayExponent ), 0.01 );\n	if ( cutoffDistance > 0.0 ) {\n		distanceFalloff *= pow2( saturate( 1.0 - pow4( lightDistance / cutoffDistance ) ) );\n	}\n	return distanceFalloff;\n}\nfloat getSpotAttenuation( const in float coneCosine, const in float penumbraCosine, const in float angleCosine ) {\n	return smoothstep( coneCosine, penumbraCosine, angleCosine );\n}\n#if NUM_DIR_LIGHTS > 0\n	struct DirectionalLight {\n		vec3 direction;\n		vec3 color;\n	};\n	uniform DirectionalLight directionalLights[ NUM_DIR_LIGHTS ];\n	void getDirectionalLightInfo( const in DirectionalLight directionalLight, out IncidentLight light ) {\n		light.color = directionalLight.color;\n		light.direction = directionalLight.direction;\n		light.visible = true;\n	}\n#endif\n#if NUM_POINT_LIGHTS > 0\n	struct PointLight {\n		vec3 position;\n		vec3 color;\n		float distance;\n		float decay;\n	};\n	uniform PointLight pointLights[ NUM_POINT_LIGHTS ];\n	void getPointLightInfo( const in PointLight pointLight, const in vec3 geometryPosition, out IncidentLight light ) {\n		vec3 lVector = pointLight.position - geometryPosition;\n		light.direction = normalize( lVector );\n		float lightDistance = length( lVector );\n		light.color = pointLight.color;\n		light.color *= getDistanceAttenuation( lightDistance, pointLight.distance, pointLight.decay );\n		light.visible = ( light.color != vec3( 0.0 ) );\n	}\n#endif\n#if NUM_SPOT_LIGHTS > 0\n	struct SpotLight {\n		vec3 position;\n		vec3 direction;\n		vec3 color;\n		float distance;\n		float decay;\n		float coneCos;\n		float penumbraCos;\n	};\n	uniform SpotLight spotLights[ NUM_SPOT_LIGHTS ];\n	void getSpotLightInfo( const in SpotLight spotLight, const in vec3 geometryPosition, out IncidentLight light ) {\n		vec3 lVector = spotLight.position - geometryPosition;\n		light.direction = normalize( lVector );\n		float angleCos = dot( light.direction, spotLight.direction );\n		float spotAttenuation = getSpotAttenuation( spotLight.coneCos, spotLight.penumbraCos, angleCos );\n		if ( spotAttenuation > 0.0 ) {\n			float lightDistance = length( lVector );\n			light.color = spotLight.color * spotAttenuation;\n			light.color *= getDistanceAttenuation( lightDistance, spotLight.distance, spotLight.decay );\n			light.visible = ( light.color != vec3( 0.0 ) );\n		} else {\n			light.color = vec3( 0.0 );\n			light.visible = false;\n		}\n	}\n#endif\n#if NUM_RECT_AREA_LIGHTS > 0\n	struct RectAreaLight {\n		vec3 color;\n		vec3 position;\n		vec3 halfWidth;\n		vec3 halfHeight;\n	};\n	uniform sampler2D ltc_1;	uniform sampler2D ltc_2;\n	uniform RectAreaLight rectAreaLights[ NUM_RECT_AREA_LIGHTS ];\n#endif\n#if NUM_HEMI_LIGHTS > 0\n	struct HemisphereLight {\n		vec3 direction;\n		vec3 skyColor;\n		vec3 groundColor;\n	};\n	uniform HemisphereLight hemisphereLights[ NUM_HEMI_LIGHTS ];\n	vec3 getHemisphereLightIrradiance( const in HemisphereLight hemiLight, const in vec3 normal ) {\n		float dotNL = dot( normal, hemiLight.direction );\n		float hemiDiffuseWeight = 0.5 * dotNL + 0.5;\n		vec3 irradiance = mix( hemiLight.groundColor, hemiLight.skyColor, hemiDiffuseWeight );\n		return irradiance;\n	}\n#endif";
var envmap_physical_pars_fragment = "#ifdef USE_ENVMAP\n	vec3 getIBLIrradiance( const in vec3 normal ) {\n		#ifdef ENVMAP_TYPE_CUBE_UV\n			vec3 worldNormal = inverseTransformDirection( normal, viewMatrix );\n			vec4 envMapColor = textureCubeUV( envMap, envMapRotation * worldNormal, 1.0 );\n			return PI * envMapColor.rgb * envMapIntensity;\n		#else\n			return vec3( 0.0 );\n		#endif\n	}\n	vec3 getIBLRadiance( const in vec3 viewDir, const in vec3 normal, const in float roughness ) {\n		#ifdef ENVMAP_TYPE_CUBE_UV\n			vec3 reflectVec = reflect( - viewDir, normal );\n			reflectVec = normalize( mix( reflectVec, normal, roughness * roughness) );\n			reflectVec = inverseTransformDirection( reflectVec, viewMatrix );\n			vec4 envMapColor = textureCubeUV( envMap, envMapRotation * reflectVec, roughness );\n			return envMapColor.rgb * envMapIntensity;\n		#else\n			return vec3( 0.0 );\n		#endif\n	}\n	#ifdef USE_ANISOTROPY\n		vec3 getIBLAnisotropyRadiance( const in vec3 viewDir, const in vec3 normal, const in float roughness, const in vec3 bitangent, const in float anisotropy ) {\n			#ifdef ENVMAP_TYPE_CUBE_UV\n				vec3 bentNormal = cross( bitangent, viewDir );\n				bentNormal = normalize( cross( bentNormal, bitangent ) );\n				bentNormal = normalize( mix( bentNormal, normal, pow2( pow2( 1.0 - anisotropy * ( 1.0 - roughness ) ) ) ) );\n				return getIBLRadiance( viewDir, bentNormal, roughness );\n			#else\n				return vec3( 0.0 );\n			#endif\n		}\n	#endif\n#endif";
var lights_toon_fragment = "ToonMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;";
var lights_toon_pars_fragment = "varying vec3 vViewPosition;\nstruct ToonMaterial {\n	vec3 diffuseColor;\n};\nvoid RE_Direct_Toon( const in IncidentLight directLight, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\n	vec3 irradiance = getGradientIrradiance( geometryNormal, directLight.direction ) * directLight.color;\n	reflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Toon( const in vec3 irradiance, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in ToonMaterial material, inout ReflectedLight reflectedLight ) {\n	reflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\n#define RE_Direct				RE_Direct_Toon\n#define RE_IndirectDiffuse		RE_IndirectDiffuse_Toon";
var lights_phong_fragment = "BlinnPhongMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb;\nmaterial.specularColor = specular;\nmaterial.specularShininess = shininess;\nmaterial.specularStrength = specularStrength;";
var lights_phong_pars_fragment = "varying vec3 vViewPosition;\nstruct BlinnPhongMaterial {\n	vec3 diffuseColor;\n	vec3 specularColor;\n	float specularShininess;\n	float specularStrength;\n};\nvoid RE_Direct_BlinnPhong( const in IncidentLight directLight, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n	float dotNL = saturate( dot( geometryNormal, directLight.direction ) );\n	vec3 irradiance = dotNL * directLight.color;\n	reflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n	reflectedLight.directSpecular += irradiance * BRDF_BlinnPhong( directLight.direction, geometryViewDir, geometryNormal, material.specularColor, material.specularShininess ) * material.specularStrength;\n}\nvoid RE_IndirectDiffuse_BlinnPhong( const in vec3 irradiance, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in BlinnPhongMaterial material, inout ReflectedLight reflectedLight ) {\n	reflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\n#define RE_Direct				RE_Direct_BlinnPhong\n#define RE_IndirectDiffuse		RE_IndirectDiffuse_BlinnPhong";
var lights_physical_fragment = "PhysicalMaterial material;\nmaterial.diffuseColor = diffuseColor.rgb * ( 1.0 - metalnessFactor );\nvec3 dxy = max( abs( dFdx( nonPerturbedNormal ) ), abs( dFdy( nonPerturbedNormal ) ) );\nfloat geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );\nmaterial.roughness = max( roughnessFactor, 0.0525 );material.roughness += geometryRoughness;\nmaterial.roughness = min( material.roughness, 1.0 );\n#ifdef IOR\n	material.ior = ior;\n	#ifdef USE_SPECULAR\n		float specularIntensityFactor = specularIntensity;\n		vec3 specularColorFactor = specularColor;\n		#ifdef USE_SPECULAR_COLORMAP\n			specularColorFactor *= texture2D( specularColorMap, vSpecularColorMapUv ).rgb;\n		#endif\n		#ifdef USE_SPECULAR_INTENSITYMAP\n			specularIntensityFactor *= texture2D( specularIntensityMap, vSpecularIntensityMapUv ).a;\n		#endif\n		material.specularF90 = mix( specularIntensityFactor, 1.0, metalnessFactor );\n	#else\n		float specularIntensityFactor = 1.0;\n		vec3 specularColorFactor = vec3( 1.0 );\n		material.specularF90 = 1.0;\n	#endif\n	material.specularColor = mix( min( pow2( ( material.ior - 1.0 ) / ( material.ior + 1.0 ) ) * specularColorFactor, vec3( 1.0 ) ) * specularIntensityFactor, diffuseColor.rgb, metalnessFactor );\n#else\n	material.specularColor = mix( vec3( 0.04 ), diffuseColor.rgb, metalnessFactor );\n	material.specularF90 = 1.0;\n#endif\n#ifdef USE_CLEARCOAT\n	material.clearcoat = clearcoat;\n	material.clearcoatRoughness = clearcoatRoughness;\n	material.clearcoatF0 = vec3( 0.04 );\n	material.clearcoatF90 = 1.0;\n	#ifdef USE_CLEARCOATMAP\n		material.clearcoat *= texture2D( clearcoatMap, vClearcoatMapUv ).x;\n	#endif\n	#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n		material.clearcoatRoughness *= texture2D( clearcoatRoughnessMap, vClearcoatRoughnessMapUv ).y;\n	#endif\n	material.clearcoat = saturate( material.clearcoat );	material.clearcoatRoughness = max( material.clearcoatRoughness, 0.0525 );\n	material.clearcoatRoughness += geometryRoughness;\n	material.clearcoatRoughness = min( material.clearcoatRoughness, 1.0 );\n#endif\n#ifdef USE_DISPERSION\n	material.dispersion = dispersion;\n#endif\n#ifdef USE_IRIDESCENCE\n	material.iridescence = iridescence;\n	material.iridescenceIOR = iridescenceIOR;\n	#ifdef USE_IRIDESCENCEMAP\n		material.iridescence *= texture2D( iridescenceMap, vIridescenceMapUv ).r;\n	#endif\n	#ifdef USE_IRIDESCENCE_THICKNESSMAP\n		material.iridescenceThickness = (iridescenceThicknessMaximum - iridescenceThicknessMinimum) * texture2D( iridescenceThicknessMap, vIridescenceThicknessMapUv ).g + iridescenceThicknessMinimum;\n	#else\n		material.iridescenceThickness = iridescenceThicknessMaximum;\n	#endif\n#endif\n#ifdef USE_SHEEN\n	material.sheenColor = sheenColor;\n	#ifdef USE_SHEEN_COLORMAP\n		material.sheenColor *= texture2D( sheenColorMap, vSheenColorMapUv ).rgb;\n	#endif\n	material.sheenRoughness = clamp( sheenRoughness, 0.07, 1.0 );\n	#ifdef USE_SHEEN_ROUGHNESSMAP\n		material.sheenRoughness *= texture2D( sheenRoughnessMap, vSheenRoughnessMapUv ).a;\n	#endif\n#endif\n#ifdef USE_ANISOTROPY\n	#ifdef USE_ANISOTROPYMAP\n		mat2 anisotropyMat = mat2( anisotropyVector.x, anisotropyVector.y, - anisotropyVector.y, anisotropyVector.x );\n		vec3 anisotropyPolar = texture2D( anisotropyMap, vAnisotropyMapUv ).rgb;\n		vec2 anisotropyV = anisotropyMat * normalize( 2.0 * anisotropyPolar.rg - vec2( 1.0 ) ) * anisotropyPolar.b;\n	#else\n		vec2 anisotropyV = anisotropyVector;\n	#endif\n	material.anisotropy = length( anisotropyV );\n	if( material.anisotropy == 0.0 ) {\n		anisotropyV = vec2( 1.0, 0.0 );\n	} else {\n		anisotropyV /= material.anisotropy;\n		material.anisotropy = saturate( material.anisotropy );\n	}\n	material.alphaT = mix( pow2( material.roughness ), 1.0, pow2( material.anisotropy ) );\n	material.anisotropyT = tbn[ 0 ] * anisotropyV.x + tbn[ 1 ] * anisotropyV.y;\n	material.anisotropyB = tbn[ 1 ] * anisotropyV.x - tbn[ 0 ] * anisotropyV.y;\n#endif";
var lights_physical_pars_fragment = "struct PhysicalMaterial {\n	vec3 diffuseColor;\n	float roughness;\n	vec3 specularColor;\n	float specularF90;\n	float dispersion;\n	#ifdef USE_CLEARCOAT\n		float clearcoat;\n		float clearcoatRoughness;\n		vec3 clearcoatF0;\n		float clearcoatF90;\n	#endif\n	#ifdef USE_IRIDESCENCE\n		float iridescence;\n		float iridescenceIOR;\n		float iridescenceThickness;\n		vec3 iridescenceFresnel;\n		vec3 iridescenceF0;\n	#endif\n	#ifdef USE_SHEEN\n		vec3 sheenColor;\n		float sheenRoughness;\n	#endif\n	#ifdef IOR\n		float ior;\n	#endif\n	#ifdef USE_TRANSMISSION\n		float transmission;\n		float transmissionAlpha;\n		float thickness;\n		float attenuationDistance;\n		vec3 attenuationColor;\n	#endif\n	#ifdef USE_ANISOTROPY\n		float anisotropy;\n		float alphaT;\n		vec3 anisotropyT;\n		vec3 anisotropyB;\n	#endif\n};\nvec3 clearcoatSpecularDirect = vec3( 0.0 );\nvec3 clearcoatSpecularIndirect = vec3( 0.0 );\nvec3 sheenSpecularDirect = vec3( 0.0 );\nvec3 sheenSpecularIndirect = vec3(0.0 );\nvec3 Schlick_to_F0( const in vec3 f, const in float f90, const in float dotVH ) {\n    float x = clamp( 1.0 - dotVH, 0.0, 1.0 );\n    float x2 = x * x;\n    float x5 = clamp( x * x2 * x2, 0.0, 0.9999 );\n    return ( f - vec3( f90 ) * x5 ) / ( 1.0 - x5 );\n}\nfloat V_GGX_SmithCorrelated( const in float alpha, const in float dotNL, const in float dotNV ) {\n	float a2 = pow2( alpha );\n	float gv = dotNL * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNV ) );\n	float gl = dotNV * sqrt( a2 + ( 1.0 - a2 ) * pow2( dotNL ) );\n	return 0.5 / max( gv + gl, EPSILON );\n}\nfloat D_GGX( const in float alpha, const in float dotNH ) {\n	float a2 = pow2( alpha );\n	float denom = pow2( dotNH ) * ( a2 - 1.0 ) + 1.0;\n	return RECIPROCAL_PI * a2 / pow2( denom );\n}\n#ifdef USE_ANISOTROPY\n	float V_GGX_SmithCorrelated_Anisotropic( const in float alphaT, const in float alphaB, const in float dotTV, const in float dotBV, const in float dotTL, const in float dotBL, const in float dotNV, const in float dotNL ) {\n		float gv = dotNL * length( vec3( alphaT * dotTV, alphaB * dotBV, dotNV ) );\n		float gl = dotNV * length( vec3( alphaT * dotTL, alphaB * dotBL, dotNL ) );\n		float v = 0.5 / ( gv + gl );\n		return saturate(v);\n	}\n	float D_GGX_Anisotropic( const in float alphaT, const in float alphaB, const in float dotNH, const in float dotTH, const in float dotBH ) {\n		float a2 = alphaT * alphaB;\n		highp vec3 v = vec3( alphaB * dotTH, alphaT * dotBH, a2 * dotNH );\n		highp float v2 = dot( v, v );\n		float w2 = a2 / v2;\n		return RECIPROCAL_PI * a2 * pow2 ( w2 );\n	}\n#endif\n#ifdef USE_CLEARCOAT\n	vec3 BRDF_GGX_Clearcoat( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in PhysicalMaterial material) {\n		vec3 f0 = material.clearcoatF0;\n		float f90 = material.clearcoatF90;\n		float roughness = material.clearcoatRoughness;\n		float alpha = pow2( roughness );\n		vec3 halfDir = normalize( lightDir + viewDir );\n		float dotNL = saturate( dot( normal, lightDir ) );\n		float dotNV = saturate( dot( normal, viewDir ) );\n		float dotNH = saturate( dot( normal, halfDir ) );\n		float dotVH = saturate( dot( viewDir, halfDir ) );\n		vec3 F = F_Schlick( f0, f90, dotVH );\n		float V = V_GGX_SmithCorrelated( alpha, dotNL, dotNV );\n		float D = D_GGX( alpha, dotNH );\n		return F * ( V * D );\n	}\n#endif\nvec3 BRDF_GGX( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, const in PhysicalMaterial material ) {\n	vec3 f0 = material.specularColor;\n	float f90 = material.specularF90;\n	float roughness = material.roughness;\n	float alpha = pow2( roughness );\n	vec3 halfDir = normalize( lightDir + viewDir );\n	float dotNL = saturate( dot( normal, lightDir ) );\n	float dotNV = saturate( dot( normal, viewDir ) );\n	float dotNH = saturate( dot( normal, halfDir ) );\n	float dotVH = saturate( dot( viewDir, halfDir ) );\n	vec3 F = F_Schlick( f0, f90, dotVH );\n	#ifdef USE_IRIDESCENCE\n		F = mix( F, material.iridescenceFresnel, material.iridescence );\n	#endif\n	#ifdef USE_ANISOTROPY\n		float dotTL = dot( material.anisotropyT, lightDir );\n		float dotTV = dot( material.anisotropyT, viewDir );\n		float dotTH = dot( material.anisotropyT, halfDir );\n		float dotBL = dot( material.anisotropyB, lightDir );\n		float dotBV = dot( material.anisotropyB, viewDir );\n		float dotBH = dot( material.anisotropyB, halfDir );\n		float V = V_GGX_SmithCorrelated_Anisotropic( material.alphaT, alpha, dotTV, dotBV, dotTL, dotBL, dotNV, dotNL );\n		float D = D_GGX_Anisotropic( material.alphaT, alpha, dotNH, dotTH, dotBH );\n	#else\n		float V = V_GGX_SmithCorrelated( alpha, dotNL, dotNV );\n		float D = D_GGX( alpha, dotNH );\n	#endif\n	return F * ( V * D );\n}\nvec2 LTC_Uv( const in vec3 N, const in vec3 V, const in float roughness ) {\n	const float LUT_SIZE = 64.0;\n	const float LUT_SCALE = ( LUT_SIZE - 1.0 ) / LUT_SIZE;\n	const float LUT_BIAS = 0.5 / LUT_SIZE;\n	float dotNV = saturate( dot( N, V ) );\n	vec2 uv = vec2( roughness, sqrt( 1.0 - dotNV ) );\n	uv = uv * LUT_SCALE + LUT_BIAS;\n	return uv;\n}\nfloat LTC_ClippedSphereFormFactor( const in vec3 f ) {\n	float l = length( f );\n	return max( ( l * l + f.z ) / ( l + 1.0 ), 0.0 );\n}\nvec3 LTC_EdgeVectorFormFactor( const in vec3 v1, const in vec3 v2 ) {\n	float x = dot( v1, v2 );\n	float y = abs( x );\n	float a = 0.8543985 + ( 0.4965155 + 0.0145206 * y ) * y;\n	float b = 3.4175940 + ( 4.1616724 + y ) * y;\n	float v = a / b;\n	float theta_sintheta = ( x > 0.0 ) ? v : 0.5 * inversesqrt( max( 1.0 - x * x, 1e-7 ) ) - v;\n	return cross( v1, v2 ) * theta_sintheta;\n}\nvec3 LTC_Evaluate( const in vec3 N, const in vec3 V, const in vec3 P, const in mat3 mInv, const in vec3 rectCoords[ 4 ] ) {\n	vec3 v1 = rectCoords[ 1 ] - rectCoords[ 0 ];\n	vec3 v2 = rectCoords[ 3 ] - rectCoords[ 0 ];\n	vec3 lightNormal = cross( v1, v2 );\n	if( dot( lightNormal, P - rectCoords[ 0 ] ) < 0.0 ) return vec3( 0.0 );\n	vec3 T1, T2;\n	T1 = normalize( V - N * dot( V, N ) );\n	T2 = - cross( N, T1 );\n	mat3 mat = mInv * transposeMat3( mat3( T1, T2, N ) );\n	vec3 coords[ 4 ];\n	coords[ 0 ] = mat * ( rectCoords[ 0 ] - P );\n	coords[ 1 ] = mat * ( rectCoords[ 1 ] - P );\n	coords[ 2 ] = mat * ( rectCoords[ 2 ] - P );\n	coords[ 3 ] = mat * ( rectCoords[ 3 ] - P );\n	coords[ 0 ] = normalize( coords[ 0 ] );\n	coords[ 1 ] = normalize( coords[ 1 ] );\n	coords[ 2 ] = normalize( coords[ 2 ] );\n	coords[ 3 ] = normalize( coords[ 3 ] );\n	vec3 vectorFormFactor = vec3( 0.0 );\n	vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 0 ], coords[ 1 ] );\n	vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 1 ], coords[ 2 ] );\n	vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 2 ], coords[ 3 ] );\n	vectorFormFactor += LTC_EdgeVectorFormFactor( coords[ 3 ], coords[ 0 ] );\n	float result = LTC_ClippedSphereFormFactor( vectorFormFactor );\n	return vec3( result );\n}\n#if defined( USE_SHEEN )\nfloat D_Charlie( float roughness, float dotNH ) {\n	float alpha = pow2( roughness );\n	float invAlpha = 1.0 / alpha;\n	float cos2h = dotNH * dotNH;\n	float sin2h = max( 1.0 - cos2h, 0.0078125 );\n	return ( 2.0 + invAlpha ) * pow( sin2h, invAlpha * 0.5 ) / ( 2.0 * PI );\n}\nfloat V_Neubelt( float dotNV, float dotNL ) {\n	return saturate( 1.0 / ( 4.0 * ( dotNL + dotNV - dotNL * dotNV ) ) );\n}\nvec3 BRDF_Sheen( const in vec3 lightDir, const in vec3 viewDir, const in vec3 normal, vec3 sheenColor, const in float sheenRoughness ) {\n	vec3 halfDir = normalize( lightDir + viewDir );\n	float dotNL = saturate( dot( normal, lightDir ) );\n	float dotNV = saturate( dot( normal, viewDir ) );\n	float dotNH = saturate( dot( normal, halfDir ) );\n	float D = D_Charlie( sheenRoughness, dotNH );\n	float V = V_Neubelt( dotNV, dotNL );\n	return sheenColor * ( D * V );\n}\n#endif\nfloat IBLSheenBRDF( const in vec3 normal, const in vec3 viewDir, const in float roughness ) {\n	float dotNV = saturate( dot( normal, viewDir ) );\n	float r2 = roughness * roughness;\n	float a = roughness < 0.25 ? -339.2 * r2 + 161.4 * roughness - 25.9 : -8.48 * r2 + 14.3 * roughness - 9.95;\n	float b = roughness < 0.25 ? 44.0 * r2 - 23.7 * roughness + 3.26 : 1.97 * r2 - 3.27 * roughness + 0.72;\n	float DG = exp( a * dotNV + b ) + ( roughness < 0.25 ? 0.0 : 0.1 * ( roughness - 0.25 ) );\n	return saturate( DG * RECIPROCAL_PI );\n}\nvec2 DFGApprox( const in vec3 normal, const in vec3 viewDir, const in float roughness ) {\n	float dotNV = saturate( dot( normal, viewDir ) );\n	const vec4 c0 = vec4( - 1, - 0.0275, - 0.572, 0.022 );\n	const vec4 c1 = vec4( 1, 0.0425, 1.04, - 0.04 );\n	vec4 r = roughness * c0 + c1;\n	float a004 = min( r.x * r.x, exp2( - 9.28 * dotNV ) ) * r.x + r.y;\n	vec2 fab = vec2( - 1.04, 1.04 ) * a004 + r.zw;\n	return fab;\n}\nvec3 EnvironmentBRDF( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float roughness ) {\n	vec2 fab = DFGApprox( normal, viewDir, roughness );\n	return specularColor * fab.x + specularF90 * fab.y;\n}\n#ifdef USE_IRIDESCENCE\nvoid computeMultiscatteringIridescence( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float iridescence, const in vec3 iridescenceF0, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {\n#else\nvoid computeMultiscattering( const in vec3 normal, const in vec3 viewDir, const in vec3 specularColor, const in float specularF90, const in float roughness, inout vec3 singleScatter, inout vec3 multiScatter ) {\n#endif\n	vec2 fab = DFGApprox( normal, viewDir, roughness );\n	#ifdef USE_IRIDESCENCE\n		vec3 Fr = mix( specularColor, iridescenceF0, iridescence );\n	#else\n		vec3 Fr = specularColor;\n	#endif\n	vec3 FssEss = Fr * fab.x + specularF90 * fab.y;\n	float Ess = fab.x + fab.y;\n	float Ems = 1.0 - Ess;\n	vec3 Favg = Fr + ( 1.0 - Fr ) * 0.047619;	vec3 Fms = FssEss * Favg / ( 1.0 - Ems * Favg );\n	singleScatter += FssEss;\n	multiScatter += Fms * Ems;\n}\n#if NUM_RECT_AREA_LIGHTS > 0\n	void RE_Direct_RectArea_Physical( const in RectAreaLight rectAreaLight, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n		vec3 normal = geometryNormal;\n		vec3 viewDir = geometryViewDir;\n		vec3 position = geometryPosition;\n		vec3 lightPos = rectAreaLight.position;\n		vec3 halfWidth = rectAreaLight.halfWidth;\n		vec3 halfHeight = rectAreaLight.halfHeight;\n		vec3 lightColor = rectAreaLight.color;\n		float roughness = material.roughness;\n		vec3 rectCoords[ 4 ];\n		rectCoords[ 0 ] = lightPos + halfWidth - halfHeight;		rectCoords[ 1 ] = lightPos - halfWidth - halfHeight;\n		rectCoords[ 2 ] = lightPos - halfWidth + halfHeight;\n		rectCoords[ 3 ] = lightPos + halfWidth + halfHeight;\n		vec2 uv = LTC_Uv( normal, viewDir, roughness );\n		vec4 t1 = texture2D( ltc_1, uv );\n		vec4 t2 = texture2D( ltc_2, uv );\n		mat3 mInv = mat3(\n			vec3( t1.x, 0, t1.y ),\n			vec3(    0, 1,    0 ),\n			vec3( t1.z, 0, t1.w )\n		);\n		vec3 fresnel = ( material.specularColor * t2.x + ( vec3( 1.0 ) - material.specularColor ) * t2.y );\n		reflectedLight.directSpecular += lightColor * fresnel * LTC_Evaluate( normal, viewDir, position, mInv, rectCoords );\n		reflectedLight.directDiffuse += lightColor * material.diffuseColor * LTC_Evaluate( normal, viewDir, position, mat3( 1.0 ), rectCoords );\n	}\n#endif\nvoid RE_Direct_Physical( const in IncidentLight directLight, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n	float dotNL = saturate( dot( geometryNormal, directLight.direction ) );\n	vec3 irradiance = dotNL * directLight.color;\n	#ifdef USE_CLEARCOAT\n		float dotNLcc = saturate( dot( geometryClearcoatNormal, directLight.direction ) );\n		vec3 ccIrradiance = dotNLcc * directLight.color;\n		clearcoatSpecularDirect += ccIrradiance * BRDF_GGX_Clearcoat( directLight.direction, geometryViewDir, geometryClearcoatNormal, material );\n	#endif\n	#ifdef USE_SHEEN\n		sheenSpecularDirect += irradiance * BRDF_Sheen( directLight.direction, geometryViewDir, geometryNormal, material.sheenColor, material.sheenRoughness );\n	#endif\n	reflectedLight.directSpecular += irradiance * BRDF_GGX( directLight.direction, geometryViewDir, geometryNormal, material );\n	reflectedLight.directDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectDiffuse_Physical( const in vec3 irradiance, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in PhysicalMaterial material, inout ReflectedLight reflectedLight ) {\n	reflectedLight.indirectDiffuse += irradiance * BRDF_Lambert( material.diffuseColor );\n}\nvoid RE_IndirectSpecular_Physical( const in vec3 radiance, const in vec3 irradiance, const in vec3 clearcoatRadiance, const in vec3 geometryPosition, const in vec3 geometryNormal, const in vec3 geometryViewDir, const in vec3 geometryClearcoatNormal, const in PhysicalMaterial material, inout ReflectedLight reflectedLight) {\n	#ifdef USE_CLEARCOAT\n		clearcoatSpecularIndirect += clearcoatRadiance * EnvironmentBRDF( geometryClearcoatNormal, geometryViewDir, material.clearcoatF0, material.clearcoatF90, material.clearcoatRoughness );\n	#endif\n	#ifdef USE_SHEEN\n		sheenSpecularIndirect += irradiance * material.sheenColor * IBLSheenBRDF( geometryNormal, geometryViewDir, material.sheenRoughness );\n	#endif\n	vec3 singleScattering = vec3( 0.0 );\n	vec3 multiScattering = vec3( 0.0 );\n	vec3 cosineWeightedIrradiance = irradiance * RECIPROCAL_PI;\n	#ifdef USE_IRIDESCENCE\n		computeMultiscatteringIridescence( geometryNormal, geometryViewDir, material.specularColor, material.specularF90, material.iridescence, material.iridescenceFresnel, material.roughness, singleScattering, multiScattering );\n	#else\n		computeMultiscattering( geometryNormal, geometryViewDir, material.specularColor, material.specularF90, material.roughness, singleScattering, multiScattering );\n	#endif\n	vec3 totalScattering = singleScattering + multiScattering;\n	vec3 diffuse = material.diffuseColor * ( 1.0 - max( max( totalScattering.r, totalScattering.g ), totalScattering.b ) );\n	reflectedLight.indirectSpecular += radiance * singleScattering;\n	reflectedLight.indirectSpecular += multiScattering * cosineWeightedIrradiance;\n	reflectedLight.indirectDiffuse += diffuse * cosineWeightedIrradiance;\n}\n#define RE_Direct				RE_Direct_Physical\n#define RE_Direct_RectArea		RE_Direct_RectArea_Physical\n#define RE_IndirectDiffuse		RE_IndirectDiffuse_Physical\n#define RE_IndirectSpecular		RE_IndirectSpecular_Physical\nfloat computeSpecularOcclusion( const in float dotNV, const in float ambientOcclusion, const in float roughness ) {\n	return saturate( pow( dotNV + ambientOcclusion, exp2( - 16.0 * roughness - 1.0 ) ) - 1.0 + ambientOcclusion );\n}";
var lights_fragment_begin = "\nvec3 geometryPosition = - vViewPosition;\nvec3 geometryNormal = normal;\nvec3 geometryViewDir = ( isOrthographic ) ? vec3( 0, 0, 1 ) : normalize( vViewPosition );\nvec3 geometryClearcoatNormal = vec3( 0.0 );\n#ifdef USE_CLEARCOAT\n	geometryClearcoatNormal = clearcoatNormal;\n#endif\n#ifdef USE_IRIDESCENCE\n	float dotNVi = saturate( dot( normal, geometryViewDir ) );\n	if ( material.iridescenceThickness == 0.0 ) {\n		material.iridescence = 0.0;\n	} else {\n		material.iridescence = saturate( material.iridescence );\n	}\n	if ( material.iridescence > 0.0 ) {\n		material.iridescenceFresnel = evalIridescence( 1.0, material.iridescenceIOR, dotNVi, material.iridescenceThickness, material.specularColor );\n		material.iridescenceF0 = Schlick_to_F0( material.iridescenceFresnel, 1.0, dotNVi );\n	}\n#endif\nIncidentLight directLight;\n#if ( NUM_POINT_LIGHTS > 0 ) && defined( RE_Direct )\n	PointLight pointLight;\n	#if defined( USE_SHADOWMAP ) && NUM_POINT_LIGHT_SHADOWS > 0\n	PointLightShadow pointLightShadow;\n	#endif\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_POINT_LIGHTS; i ++ ) {\n		pointLight = pointLights[ i ];\n		getPointLightInfo( pointLight, geometryPosition, directLight );\n		#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_POINT_LIGHT_SHADOWS )\n		pointLightShadow = pointLightShadows[ i ];\n		directLight.color *= ( directLight.visible && receiveShadow ) ? getPointShadow( pointShadowMap[ i ], pointLightShadow.shadowMapSize, pointLightShadow.shadowIntensity, pointLightShadow.shadowBias, pointLightShadow.shadowRadius, vPointShadowCoord[ i ], pointLightShadow.shadowCameraNear, pointLightShadow.shadowCameraFar ) : 1.0;\n		#endif\n		RE_Direct( directLight, geometryPosition, geometryNormal, geometryViewDir, geometryClearcoatNormal, material, reflectedLight );\n	}\n	#pragma unroll_loop_end\n#endif\n#if ( NUM_SPOT_LIGHTS > 0 ) && defined( RE_Direct )\n	SpotLight spotLight;\n	vec4 spotColor;\n	vec3 spotLightCoord;\n	bool inSpotLightMap;\n	#if defined( USE_SHADOWMAP ) && NUM_SPOT_LIGHT_SHADOWS > 0\n	SpotLightShadow spotLightShadow;\n	#endif\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_SPOT_LIGHTS; i ++ ) {\n		spotLight = spotLights[ i ];\n		getSpotLightInfo( spotLight, geometryPosition, directLight );\n		#if ( UNROLLED_LOOP_INDEX < NUM_SPOT_LIGHT_SHADOWS_WITH_MAPS )\n		#define SPOT_LIGHT_MAP_INDEX UNROLLED_LOOP_INDEX\n		#elif ( UNROLLED_LOOP_INDEX < NUM_SPOT_LIGHT_SHADOWS )\n		#define SPOT_LIGHT_MAP_INDEX NUM_SPOT_LIGHT_MAPS\n		#else\n		#define SPOT_LIGHT_MAP_INDEX ( UNROLLED_LOOP_INDEX - NUM_SPOT_LIGHT_SHADOWS + NUM_SPOT_LIGHT_SHADOWS_WITH_MAPS )\n		#endif\n		#if ( SPOT_LIGHT_MAP_INDEX < NUM_SPOT_LIGHT_MAPS )\n			spotLightCoord = vSpotLightCoord[ i ].xyz / vSpotLightCoord[ i ].w;\n			inSpotLightMap = all( lessThan( abs( spotLightCoord * 2. - 1. ), vec3( 1.0 ) ) );\n			spotColor = texture2D( spotLightMap[ SPOT_LIGHT_MAP_INDEX ], spotLightCoord.xy );\n			directLight.color = inSpotLightMap ? directLight.color * spotColor.rgb : directLight.color;\n		#endif\n		#undef SPOT_LIGHT_MAP_INDEX\n		#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_SPOT_LIGHT_SHADOWS )\n		spotLightShadow = spotLightShadows[ i ];\n		directLight.color *= ( directLight.visible && receiveShadow ) ? getShadow( spotShadowMap[ i ], spotLightShadow.shadowMapSize, spotLightShadow.shadowIntensity, spotLightShadow.shadowBias, spotLightShadow.shadowRadius, vSpotLightCoord[ i ] ) : 1.0;\n		#endif\n		RE_Direct( directLight, geometryPosition, geometryNormal, geometryViewDir, geometryClearcoatNormal, material, reflectedLight );\n	}\n	#pragma unroll_loop_end\n#endif\n#if ( NUM_DIR_LIGHTS > 0 ) && defined( RE_Direct )\n	DirectionalLight directionalLight;\n	#if defined( USE_SHADOWMAP ) && NUM_DIR_LIGHT_SHADOWS > 0\n	DirectionalLightShadow directionalLightShadow;\n	#endif\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {\n		directionalLight = directionalLights[ i ];\n		getDirectionalLightInfo( directionalLight, directLight );\n		#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_DIR_LIGHT_SHADOWS )\n		directionalLightShadow = directionalLightShadows[ i ];\n		directLight.color *= ( directLight.visible && receiveShadow ) ? getShadow( directionalShadowMap[ i ], directionalLightShadow.shadowMapSize, directionalLightShadow.shadowIntensity, directionalLightShadow.shadowBias, directionalLightShadow.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n		#endif\n		RE_Direct( directLight, geometryPosition, geometryNormal, geometryViewDir, geometryClearcoatNormal, material, reflectedLight );\n	}\n	#pragma unroll_loop_end\n#endif\n#if ( NUM_RECT_AREA_LIGHTS > 0 ) && defined( RE_Direct_RectArea )\n	RectAreaLight rectAreaLight;\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_RECT_AREA_LIGHTS; i ++ ) {\n		rectAreaLight = rectAreaLights[ i ];\n		RE_Direct_RectArea( rectAreaLight, geometryPosition, geometryNormal, geometryViewDir, geometryClearcoatNormal, material, reflectedLight );\n	}\n	#pragma unroll_loop_end\n#endif\n#if defined( RE_IndirectDiffuse )\n	vec3 iblIrradiance = vec3( 0.0 );\n	vec3 irradiance = getAmbientLightIrradiance( ambientLightColor );\n	#if defined( USE_LIGHT_PROBES )\n		irradiance += getLightProbeIrradiance( lightProbe, geometryNormal );\n	#endif\n	#if ( NUM_HEMI_LIGHTS > 0 )\n		#pragma unroll_loop_start\n		for ( int i = 0; i < NUM_HEMI_LIGHTS; i ++ ) {\n			irradiance += getHemisphereLightIrradiance( hemisphereLights[ i ], geometryNormal );\n		}\n		#pragma unroll_loop_end\n	#endif\n#endif\n#if defined( RE_IndirectSpecular )\n	vec3 radiance = vec3( 0.0 );\n	vec3 clearcoatRadiance = vec3( 0.0 );\n#endif";
var lights_fragment_maps = "#if defined( RE_IndirectDiffuse )\n	#ifdef USE_LIGHTMAP\n		vec4 lightMapTexel = texture2D( lightMap, vLightMapUv );\n		vec3 lightMapIrradiance = lightMapTexel.rgb * lightMapIntensity;\n		irradiance += lightMapIrradiance;\n	#endif\n	#if defined( USE_ENVMAP ) && defined( STANDARD ) && defined( ENVMAP_TYPE_CUBE_UV )\n		iblIrradiance += getIBLIrradiance( geometryNormal );\n	#endif\n#endif\n#if defined( USE_ENVMAP ) && defined( RE_IndirectSpecular )\n	#ifdef USE_ANISOTROPY\n		radiance += getIBLAnisotropyRadiance( geometryViewDir, geometryNormal, material.roughness, material.anisotropyB, material.anisotropy );\n	#else\n		radiance += getIBLRadiance( geometryViewDir, geometryNormal, material.roughness );\n	#endif\n	#ifdef USE_CLEARCOAT\n		clearcoatRadiance += getIBLRadiance( geometryViewDir, geometryClearcoatNormal, material.clearcoatRoughness );\n	#endif\n#endif";
var lights_fragment_end = "#if defined( RE_IndirectDiffuse )\n	RE_IndirectDiffuse( irradiance, geometryPosition, geometryNormal, geometryViewDir, geometryClearcoatNormal, material, reflectedLight );\n#endif\n#if defined( RE_IndirectSpecular )\n	RE_IndirectSpecular( radiance, iblIrradiance, clearcoatRadiance, geometryPosition, geometryNormal, geometryViewDir, geometryClearcoatNormal, material, reflectedLight );\n#endif";
var logdepthbuf_fragment = "#if defined( USE_LOGDEPTHBUF )\n	gl_FragDepth = vIsPerspective == 0.0 ? gl_FragCoord.z : log2( vFragDepth ) * logDepthBufFC * 0.5;\n#endif";
var logdepthbuf_pars_fragment = "#if defined( USE_LOGDEPTHBUF )\n	uniform float logDepthBufFC;\n	varying float vFragDepth;\n	varying float vIsPerspective;\n#endif";
var logdepthbuf_pars_vertex = "#ifdef USE_LOGDEPTHBUF\n	varying float vFragDepth;\n	varying float vIsPerspective;\n#endif";
var logdepthbuf_vertex = "#ifdef USE_LOGDEPTHBUF\n	vFragDepth = 1.0 + gl_Position.w;\n	vIsPerspective = float( isPerspectiveMatrix( projectionMatrix ) );\n#endif";
var map_fragment = "#ifdef USE_MAP\n	vec4 sampledDiffuseColor = texture2D( map, vMapUv );\n	#ifdef DECODE_VIDEO_TEXTURE\n		sampledDiffuseColor = sRGBTransferEOTF( sampledDiffuseColor );\n	#endif\n	diffuseColor *= sampledDiffuseColor;\n#endif";
var map_pars_fragment = "#ifdef USE_MAP\n	uniform sampler2D map;\n#endif";
var map_particle_fragment = "#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\n	#if defined( USE_POINTS_UV )\n		vec2 uv = vUv;\n	#else\n		vec2 uv = ( uvTransform * vec3( gl_PointCoord.x, 1.0 - gl_PointCoord.y, 1 ) ).xy;\n	#endif\n#endif\n#ifdef USE_MAP\n	diffuseColor *= texture2D( map, uv );\n#endif\n#ifdef USE_ALPHAMAP\n	diffuseColor.a *= texture2D( alphaMap, uv ).g;\n#endif";
var map_particle_pars_fragment = "#if defined( USE_POINTS_UV )\n	varying vec2 vUv;\n#else\n	#if defined( USE_MAP ) || defined( USE_ALPHAMAP )\n		uniform mat3 uvTransform;\n	#endif\n#endif\n#ifdef USE_MAP\n	uniform sampler2D map;\n#endif\n#ifdef USE_ALPHAMAP\n	uniform sampler2D alphaMap;\n#endif";
var metalnessmap_fragment = "float metalnessFactor = metalness;\n#ifdef USE_METALNESSMAP\n	vec4 texelMetalness = texture2D( metalnessMap, vMetalnessMapUv );\n	metalnessFactor *= texelMetalness.b;\n#endif";
var metalnessmap_pars_fragment = "#ifdef USE_METALNESSMAP\n	uniform sampler2D metalnessMap;\n#endif";
var morphinstance_vertex = "#ifdef USE_INSTANCING_MORPH\n	float morphTargetInfluences[ MORPHTARGETS_COUNT ];\n	float morphTargetBaseInfluence = texelFetch( morphTexture, ivec2( 0, gl_InstanceID ), 0 ).r;\n	for ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {\n		morphTargetInfluences[i] =  texelFetch( morphTexture, ivec2( i + 1, gl_InstanceID ), 0 ).r;\n	}\n#endif";
var morphcolor_vertex = "#if defined( USE_MORPHCOLORS )\n	vColor *= morphTargetBaseInfluence;\n	for ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {\n		#if defined( USE_COLOR_ALPHA )\n			if ( morphTargetInfluences[ i ] != 0.0 ) vColor += getMorph( gl_VertexID, i, 2 ) * morphTargetInfluences[ i ];\n		#elif defined( USE_COLOR )\n			if ( morphTargetInfluences[ i ] != 0.0 ) vColor += getMorph( gl_VertexID, i, 2 ).rgb * morphTargetInfluences[ i ];\n		#endif\n	}\n#endif";
var morphnormal_vertex = "#ifdef USE_MORPHNORMALS\n	objectNormal *= morphTargetBaseInfluence;\n	for ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {\n		if ( morphTargetInfluences[ i ] != 0.0 ) objectNormal += getMorph( gl_VertexID, i, 1 ).xyz * morphTargetInfluences[ i ];\n	}\n#endif";
var morphtarget_pars_vertex = "#ifdef USE_MORPHTARGETS\n	#ifndef USE_INSTANCING_MORPH\n		uniform float morphTargetBaseInfluence;\n		uniform float morphTargetInfluences[ MORPHTARGETS_COUNT ];\n	#endif\n	uniform sampler2DArray morphTargetsTexture;\n	uniform ivec2 morphTargetsTextureSize;\n	vec4 getMorph( const in int vertexIndex, const in int morphTargetIndex, const in int offset ) {\n		int texelIndex = vertexIndex * MORPHTARGETS_TEXTURE_STRIDE + offset;\n		int y = texelIndex / morphTargetsTextureSize.x;\n		int x = texelIndex - y * morphTargetsTextureSize.x;\n		ivec3 morphUV = ivec3( x, y, morphTargetIndex );\n		return texelFetch( morphTargetsTexture, morphUV, 0 );\n	}\n#endif";
var morphtarget_vertex = "#ifdef USE_MORPHTARGETS\n	transformed *= morphTargetBaseInfluence;\n	for ( int i = 0; i < MORPHTARGETS_COUNT; i ++ ) {\n		if ( morphTargetInfluences[ i ] != 0.0 ) transformed += getMorph( gl_VertexID, i, 0 ).xyz * morphTargetInfluences[ i ];\n	}\n#endif";
var normal_fragment_begin = "float faceDirection = gl_FrontFacing ? 1.0 : - 1.0;\n#ifdef FLAT_SHADED\n	vec3 fdx = dFdx( vViewPosition );\n	vec3 fdy = dFdy( vViewPosition );\n	vec3 normal = normalize( cross( fdx, fdy ) );\n#else\n	vec3 normal = normalize( vNormal );\n	#ifdef DOUBLE_SIDED\n		normal *= faceDirection;\n	#endif\n#endif\n#if defined( USE_NORMALMAP_TANGENTSPACE ) || defined( USE_CLEARCOAT_NORMALMAP ) || defined( USE_ANISOTROPY )\n	#ifdef USE_TANGENT\n		mat3 tbn = mat3( normalize( vTangent ), normalize( vBitangent ), normal );\n	#else\n		mat3 tbn = getTangentFrame( - vViewPosition, normal,\n		#if defined( USE_NORMALMAP )\n			vNormalMapUv\n		#elif defined( USE_CLEARCOAT_NORMALMAP )\n			vClearcoatNormalMapUv\n		#else\n			vUv\n		#endif\n		);\n	#endif\n	#if defined( DOUBLE_SIDED ) && ! defined( FLAT_SHADED )\n		tbn[0] *= faceDirection;\n		tbn[1] *= faceDirection;\n	#endif\n#endif\n#ifdef USE_CLEARCOAT_NORMALMAP\n	#ifdef USE_TANGENT\n		mat3 tbn2 = mat3( normalize( vTangent ), normalize( vBitangent ), normal );\n	#else\n		mat3 tbn2 = getTangentFrame( - vViewPosition, normal, vClearcoatNormalMapUv );\n	#endif\n	#if defined( DOUBLE_SIDED ) && ! defined( FLAT_SHADED )\n		tbn2[0] *= faceDirection;\n		tbn2[1] *= faceDirection;\n	#endif\n#endif\nvec3 nonPerturbedNormal = normal;";
var normal_fragment_maps = "#ifdef USE_NORMALMAP_OBJECTSPACE\n	normal = texture2D( normalMap, vNormalMapUv ).xyz * 2.0 - 1.0;\n	#ifdef FLIP_SIDED\n		normal = - normal;\n	#endif\n	#ifdef DOUBLE_SIDED\n		normal = normal * faceDirection;\n	#endif\n	normal = normalize( normalMatrix * normal );\n#elif defined( USE_NORMALMAP_TANGENTSPACE )\n	vec3 mapN = texture2D( normalMap, vNormalMapUv ).xyz * 2.0 - 1.0;\n	mapN.xy *= normalScale;\n	normal = normalize( tbn * mapN );\n#elif defined( USE_BUMPMAP )\n	normal = perturbNormalArb( - vViewPosition, normal, dHdxy_fwd(), faceDirection );\n#endif";
var normal_pars_fragment = "#ifndef FLAT_SHADED\n	varying vec3 vNormal;\n	#ifdef USE_TANGENT\n		varying vec3 vTangent;\n		varying vec3 vBitangent;\n	#endif\n#endif";
var normal_pars_vertex = "#ifndef FLAT_SHADED\n	varying vec3 vNormal;\n	#ifdef USE_TANGENT\n		varying vec3 vTangent;\n		varying vec3 vBitangent;\n	#endif\n#endif";
var normal_vertex = "#ifndef FLAT_SHADED\n	vNormal = normalize( transformedNormal );\n	#ifdef USE_TANGENT\n		vTangent = normalize( transformedTangent );\n		vBitangent = normalize( cross( vNormal, vTangent ) * tangent.w );\n	#endif\n#endif";
var normalmap_pars_fragment = "#ifdef USE_NORMALMAP\n	uniform sampler2D normalMap;\n	uniform vec2 normalScale;\n#endif\n#ifdef USE_NORMALMAP_OBJECTSPACE\n	uniform mat3 normalMatrix;\n#endif\n#if ! defined ( USE_TANGENT ) && ( defined ( USE_NORMALMAP_TANGENTSPACE ) || defined ( USE_CLEARCOAT_NORMALMAP ) || defined( USE_ANISOTROPY ) )\n	mat3 getTangentFrame( vec3 eye_pos, vec3 surf_norm, vec2 uv ) {\n		vec3 q0 = dFdx( eye_pos.xyz );\n		vec3 q1 = dFdy( eye_pos.xyz );\n		vec2 st0 = dFdx( uv.st );\n		vec2 st1 = dFdy( uv.st );\n		vec3 N = surf_norm;\n		vec3 q1perp = cross( q1, N );\n		vec3 q0perp = cross( N, q0 );\n		vec3 T = q1perp * st0.x + q0perp * st1.x;\n		vec3 B = q1perp * st0.y + q0perp * st1.y;\n		float det = max( dot( T, T ), dot( B, B ) );\n		float scale = ( det == 0.0 ) ? 0.0 : inversesqrt( det );\n		return mat3( T * scale, B * scale, N );\n	}\n#endif";
var clearcoat_normal_fragment_begin = "#ifdef USE_CLEARCOAT\n	vec3 clearcoatNormal = nonPerturbedNormal;\n#endif";
var clearcoat_normal_fragment_maps = "#ifdef USE_CLEARCOAT_NORMALMAP\n	vec3 clearcoatMapN = texture2D( clearcoatNormalMap, vClearcoatNormalMapUv ).xyz * 2.0 - 1.0;\n	clearcoatMapN.xy *= clearcoatNormalScale;\n	clearcoatNormal = normalize( tbn2 * clearcoatMapN );\n#endif";
var clearcoat_pars_fragment = "#ifdef USE_CLEARCOATMAP\n	uniform sampler2D clearcoatMap;\n#endif\n#ifdef USE_CLEARCOAT_NORMALMAP\n	uniform sampler2D clearcoatNormalMap;\n	uniform vec2 clearcoatNormalScale;\n#endif\n#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n	uniform sampler2D clearcoatRoughnessMap;\n#endif";
var iridescence_pars_fragment = "#ifdef USE_IRIDESCENCEMAP\n	uniform sampler2D iridescenceMap;\n#endif\n#ifdef USE_IRIDESCENCE_THICKNESSMAP\n	uniform sampler2D iridescenceThicknessMap;\n#endif";
var opaque_fragment = "#ifdef OPAQUE\ndiffuseColor.a = 1.0;\n#endif\n#ifdef USE_TRANSMISSION\ndiffuseColor.a *= material.transmissionAlpha;\n#endif\ngl_FragColor = vec4( outgoingLight, diffuseColor.a );";
var packing = "vec3 packNormalToRGB( const in vec3 normal ) {\n	return normalize( normal ) * 0.5 + 0.5;\n}\nvec3 unpackRGBToNormal( const in vec3 rgb ) {\n	return 2.0 * rgb.xyz - 1.0;\n}\nconst float PackUpscale = 256. / 255.;const float UnpackDownscale = 255. / 256.;const float ShiftRight8 = 1. / 256.;\nconst float Inv255 = 1. / 255.;\nconst vec4 PackFactors = vec4( 1.0, 256.0, 256.0 * 256.0, 256.0 * 256.0 * 256.0 );\nconst vec2 UnpackFactors2 = vec2( UnpackDownscale, 1.0 / PackFactors.g );\nconst vec3 UnpackFactors3 = vec3( UnpackDownscale / PackFactors.rg, 1.0 / PackFactors.b );\nconst vec4 UnpackFactors4 = vec4( UnpackDownscale / PackFactors.rgb, 1.0 / PackFactors.a );\nvec4 packDepthToRGBA( const in float v ) {\n	if( v <= 0.0 )\n		return vec4( 0., 0., 0., 0. );\n	if( v >= 1.0 )\n		return vec4( 1., 1., 1., 1. );\n	float vuf;\n	float af = modf( v * PackFactors.a, vuf );\n	float bf = modf( vuf * ShiftRight8, vuf );\n	float gf = modf( vuf * ShiftRight8, vuf );\n	return vec4( vuf * Inv255, gf * PackUpscale, bf * PackUpscale, af );\n}\nvec3 packDepthToRGB( const in float v ) {\n	if( v <= 0.0 )\n		return vec3( 0., 0., 0. );\n	if( v >= 1.0 )\n		return vec3( 1., 1., 1. );\n	float vuf;\n	float bf = modf( v * PackFactors.b, vuf );\n	float gf = modf( vuf * ShiftRight8, vuf );\n	return vec3( vuf * Inv255, gf * PackUpscale, bf );\n}\nvec2 packDepthToRG( const in float v ) {\n	if( v <= 0.0 )\n		return vec2( 0., 0. );\n	if( v >= 1.0 )\n		return vec2( 1., 1. );\n	float vuf;\n	float gf = modf( v * 256., vuf );\n	return vec2( vuf * Inv255, gf );\n}\nfloat unpackRGBAToDepth( const in vec4 v ) {\n	return dot( v, UnpackFactors4 );\n}\nfloat unpackRGBToDepth( const in vec3 v ) {\n	return dot( v, UnpackFactors3 );\n}\nfloat unpackRGToDepth( const in vec2 v ) {\n	return v.r * UnpackFactors2.r + v.g * UnpackFactors2.g;\n}\nvec4 pack2HalfToRGBA( const in vec2 v ) {\n	vec4 r = vec4( v.x, fract( v.x * 255.0 ), v.y, fract( v.y * 255.0 ) );\n	return vec4( r.x - r.y / 255.0, r.y, r.z - r.w / 255.0, r.w );\n}\nvec2 unpackRGBATo2Half( const in vec4 v ) {\n	return vec2( v.x + ( v.y / 255.0 ), v.z + ( v.w / 255.0 ) );\n}\nfloat viewZToOrthographicDepth( const in float viewZ, const in float near, const in float far ) {\n	return ( viewZ + near ) / ( near - far );\n}\nfloat orthographicDepthToViewZ( const in float depth, const in float near, const in float far ) {\n	return depth * ( near - far ) - near;\n}\nfloat viewZToPerspectiveDepth( const in float viewZ, const in float near, const in float far ) {\n	return ( ( near + viewZ ) * far ) / ( ( far - near ) * viewZ );\n}\nfloat perspectiveDepthToViewZ( const in float depth, const in float near, const in float far ) {\n	return ( near * far ) / ( ( far - near ) * depth - far );\n}";
var premultiplied_alpha_fragment = "#ifdef PREMULTIPLIED_ALPHA\n	gl_FragColor.rgb *= gl_FragColor.a;\n#endif";
var project_vertex = "vec4 mvPosition = vec4( transformed, 1.0 );\n#ifdef USE_BATCHING\n	mvPosition = batchingMatrix * mvPosition;\n#endif\n#ifdef USE_INSTANCING\n	mvPosition = instanceMatrix * mvPosition;\n#endif\nmvPosition = modelViewMatrix * mvPosition;\ngl_Position = projectionMatrix * mvPosition;";
var dithering_fragment = "#ifdef DITHERING\n	gl_FragColor.rgb = dithering( gl_FragColor.rgb );\n#endif";
var dithering_pars_fragment = "#ifdef DITHERING\n	vec3 dithering( vec3 color ) {\n		float grid_position = rand( gl_FragCoord.xy );\n		vec3 dither_shift_RGB = vec3( 0.25 / 255.0, -0.25 / 255.0, 0.25 / 255.0 );\n		dither_shift_RGB = mix( 2.0 * dither_shift_RGB, -2.0 * dither_shift_RGB, grid_position );\n		return color + dither_shift_RGB;\n	}\n#endif";
var roughnessmap_fragment = "float roughnessFactor = roughness;\n#ifdef USE_ROUGHNESSMAP\n	vec4 texelRoughness = texture2D( roughnessMap, vRoughnessMapUv );\n	roughnessFactor *= texelRoughness.g;\n#endif";
var roughnessmap_pars_fragment = "#ifdef USE_ROUGHNESSMAP\n	uniform sampler2D roughnessMap;\n#endif";
var shadowmap_pars_fragment = "#if NUM_SPOT_LIGHT_COORDS > 0\n	varying vec4 vSpotLightCoord[ NUM_SPOT_LIGHT_COORDS ];\n#endif\n#if NUM_SPOT_LIGHT_MAPS > 0\n	uniform sampler2D spotLightMap[ NUM_SPOT_LIGHT_MAPS ];\n#endif\n#ifdef USE_SHADOWMAP\n	#if NUM_DIR_LIGHT_SHADOWS > 0\n		uniform sampler2D directionalShadowMap[ NUM_DIR_LIGHT_SHADOWS ];\n		varying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\n		struct DirectionalLightShadow {\n			float shadowIntensity;\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n		};\n		uniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\n	#endif\n	#if NUM_SPOT_LIGHT_SHADOWS > 0\n		uniform sampler2D spotShadowMap[ NUM_SPOT_LIGHT_SHADOWS ];\n		struct SpotLightShadow {\n			float shadowIntensity;\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n		};\n		uniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\n	#endif\n	#if NUM_POINT_LIGHT_SHADOWS > 0\n		uniform sampler2D pointShadowMap[ NUM_POINT_LIGHT_SHADOWS ];\n		varying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\n		struct PointLightShadow {\n			float shadowIntensity;\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n			float shadowCameraNear;\n			float shadowCameraFar;\n		};\n		uniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\n	#endif\n	float texture2DCompare( sampler2D depths, vec2 uv, float compare ) {\n		return step( compare, unpackRGBAToDepth( texture2D( depths, uv ) ) );\n	}\n	vec2 texture2DDistribution( sampler2D shadow, vec2 uv ) {\n		return unpackRGBATo2Half( texture2D( shadow, uv ) );\n	}\n	float VSMShadow (sampler2D shadow, vec2 uv, float compare ){\n		float occlusion = 1.0;\n		vec2 distribution = texture2DDistribution( shadow, uv );\n		float hard_shadow = step( compare , distribution.x );\n		if (hard_shadow != 1.0 ) {\n			float distance = compare - distribution.x ;\n			float variance = max( 0.00000, distribution.y * distribution.y );\n			float softness_probability = variance / (variance + distance * distance );			softness_probability = clamp( ( softness_probability - 0.3 ) / ( 0.95 - 0.3 ), 0.0, 1.0 );			occlusion = clamp( max( hard_shadow, softness_probability ), 0.0, 1.0 );\n		}\n		return occlusion;\n	}\n	float getShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowIntensity, float shadowBias, float shadowRadius, vec4 shadowCoord ) {\n		float shadow = 1.0;\n		shadowCoord.xyz /= shadowCoord.w;\n		shadowCoord.z += shadowBias;\n		bool inFrustum = shadowCoord.x >= 0.0 && shadowCoord.x <= 1.0 && shadowCoord.y >= 0.0 && shadowCoord.y <= 1.0;\n		bool frustumTest = inFrustum && shadowCoord.z <= 1.0;\n		if ( frustumTest ) {\n		#if defined( SHADOWMAP_TYPE_PCF )\n			vec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n			float dx0 = - texelSize.x * shadowRadius;\n			float dy0 = - texelSize.y * shadowRadius;\n			float dx1 = + texelSize.x * shadowRadius;\n			float dy1 = + texelSize.y * shadowRadius;\n			float dx2 = dx0 / 2.0;\n			float dy2 = dy0 / 2.0;\n			float dx3 = dx1 / 2.0;\n			float dy3 = dy1 / 2.0;\n			shadow = (\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy2 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy2 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy2 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, 0.0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, 0.0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, 0.0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, 0.0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx2, dy3 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy3 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx3, dy3 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx0, dy1 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( 0.0, dy1 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, shadowCoord.xy + vec2( dx1, dy1 ), shadowCoord.z )\n			) * ( 1.0 / 17.0 );\n		#elif defined( SHADOWMAP_TYPE_PCF_SOFT )\n			vec2 texelSize = vec2( 1.0 ) / shadowMapSize;\n			float dx = texelSize.x;\n			float dy = texelSize.y;\n			vec2 uv = shadowCoord.xy;\n			vec2 f = fract( uv * shadowMapSize + 0.5 );\n			uv -= f * texelSize;\n			shadow = (\n				texture2DCompare( shadowMap, uv, shadowCoord.z ) +\n				texture2DCompare( shadowMap, uv + vec2( dx, 0.0 ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, uv + vec2( 0.0, dy ), shadowCoord.z ) +\n				texture2DCompare( shadowMap, uv + texelSize, shadowCoord.z ) +\n				mix( texture2DCompare( shadowMap, uv + vec2( -dx, 0.0 ), shadowCoord.z ),\n					 texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 0.0 ), shadowCoord.z ),\n					 f.x ) +\n				mix( texture2DCompare( shadowMap, uv + vec2( -dx, dy ), shadowCoord.z ),\n					 texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, dy ), shadowCoord.z ),\n					 f.x ) +\n				mix( texture2DCompare( shadowMap, uv + vec2( 0.0, -dy ), shadowCoord.z ),\n					 texture2DCompare( shadowMap, uv + vec2( 0.0, 2.0 * dy ), shadowCoord.z ),\n					 f.y ) +\n				mix( texture2DCompare( shadowMap, uv + vec2( dx, -dy ), shadowCoord.z ),\n					 texture2DCompare( shadowMap, uv + vec2( dx, 2.0 * dy ), shadowCoord.z ),\n					 f.y ) +\n				mix( mix( texture2DCompare( shadowMap, uv + vec2( -dx, -dy ), shadowCoord.z ),\n						  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, -dy ), shadowCoord.z ),\n						  f.x ),\n					 mix( texture2DCompare( shadowMap, uv + vec2( -dx, 2.0 * dy ), shadowCoord.z ),\n						  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 2.0 * dy ), shadowCoord.z ),\n						  f.x ),\n					 f.y )\n			) * ( 1.0 / 9.0 );\n		#elif defined( SHADOWMAP_TYPE_VSM )\n			shadow = VSMShadow( shadowMap, shadowCoord.xy, shadowCoord.z );\n		#else\n			shadow = texture2DCompare( shadowMap, shadowCoord.xy, shadowCoord.z );\n		#endif\n		}\n		return mix( 1.0, shadow, shadowIntensity );\n	}\n	vec2 cubeToUV( vec3 v, float texelSizeY ) {\n		vec3 absV = abs( v );\n		float scaleToCube = 1.0 / max( absV.x, max( absV.y, absV.z ) );\n		absV *= scaleToCube;\n		v *= scaleToCube * ( 1.0 - 2.0 * texelSizeY );\n		vec2 planar = v.xy;\n		float almostATexel = 1.5 * texelSizeY;\n		float almostOne = 1.0 - almostATexel;\n		if ( absV.z >= almostOne ) {\n			if ( v.z > 0.0 )\n				planar.x = 4.0 - v.x;\n		} else if ( absV.x >= almostOne ) {\n			float signX = sign( v.x );\n			planar.x = v.z * signX + 2.0 * signX;\n		} else if ( absV.y >= almostOne ) {\n			float signY = sign( v.y );\n			planar.x = v.x + 2.0 * signY + 2.0;\n			planar.y = v.z * signY - 2.0;\n		}\n		return vec2( 0.125, 0.25 ) * planar + vec2( 0.375, 0.75 );\n	}\n	float getPointShadow( sampler2D shadowMap, vec2 shadowMapSize, float shadowIntensity, float shadowBias, float shadowRadius, vec4 shadowCoord, float shadowCameraNear, float shadowCameraFar ) {\n		float shadow = 1.0;\n		vec3 lightToPosition = shadowCoord.xyz;\n		\n		float lightToPositionLength = length( lightToPosition );\n		if ( lightToPositionLength - shadowCameraFar <= 0.0 && lightToPositionLength - shadowCameraNear >= 0.0 ) {\n			float dp = ( lightToPositionLength - shadowCameraNear ) / ( shadowCameraFar - shadowCameraNear );			dp += shadowBias;\n			vec3 bd3D = normalize( lightToPosition );\n			vec2 texelSize = vec2( 1.0 ) / ( shadowMapSize * vec2( 4.0, 2.0 ) );\n			#if defined( SHADOWMAP_TYPE_PCF ) || defined( SHADOWMAP_TYPE_PCF_SOFT ) || defined( SHADOWMAP_TYPE_VSM )\n				vec2 offset = vec2( - 1, 1 ) * shadowRadius * texelSize.y;\n				shadow = (\n					texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyy, texelSize.y ), dp ) +\n					texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyy, texelSize.y ), dp ) +\n					texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xyx, texelSize.y ), dp ) +\n					texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yyx, texelSize.y ), dp ) +\n					texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp ) +\n					texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxy, texelSize.y ), dp ) +\n					texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxy, texelSize.y ), dp ) +\n					texture2DCompare( shadowMap, cubeToUV( bd3D + offset.xxx, texelSize.y ), dp ) +\n					texture2DCompare( shadowMap, cubeToUV( bd3D + offset.yxx, texelSize.y ), dp )\n				) * ( 1.0 / 9.0 );\n			#else\n				shadow = texture2DCompare( shadowMap, cubeToUV( bd3D, texelSize.y ), dp );\n			#endif\n		}\n		return mix( 1.0, shadow, shadowIntensity );\n	}\n#endif";
var shadowmap_pars_vertex = "#if NUM_SPOT_LIGHT_COORDS > 0\n	uniform mat4 spotLightMatrix[ NUM_SPOT_LIGHT_COORDS ];\n	varying vec4 vSpotLightCoord[ NUM_SPOT_LIGHT_COORDS ];\n#endif\n#ifdef USE_SHADOWMAP\n	#if NUM_DIR_LIGHT_SHADOWS > 0\n		uniform mat4 directionalShadowMatrix[ NUM_DIR_LIGHT_SHADOWS ];\n		varying vec4 vDirectionalShadowCoord[ NUM_DIR_LIGHT_SHADOWS ];\n		struct DirectionalLightShadow {\n			float shadowIntensity;\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n		};\n		uniform DirectionalLightShadow directionalLightShadows[ NUM_DIR_LIGHT_SHADOWS ];\n	#endif\n	#if NUM_SPOT_LIGHT_SHADOWS > 0\n		struct SpotLightShadow {\n			float shadowIntensity;\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n		};\n		uniform SpotLightShadow spotLightShadows[ NUM_SPOT_LIGHT_SHADOWS ];\n	#endif\n	#if NUM_POINT_LIGHT_SHADOWS > 0\n		uniform mat4 pointShadowMatrix[ NUM_POINT_LIGHT_SHADOWS ];\n		varying vec4 vPointShadowCoord[ NUM_POINT_LIGHT_SHADOWS ];\n		struct PointLightShadow {\n			float shadowIntensity;\n			float shadowBias;\n			float shadowNormalBias;\n			float shadowRadius;\n			vec2 shadowMapSize;\n			float shadowCameraNear;\n			float shadowCameraFar;\n		};\n		uniform PointLightShadow pointLightShadows[ NUM_POINT_LIGHT_SHADOWS ];\n	#endif\n#endif";
var shadowmap_vertex = "#if ( defined( USE_SHADOWMAP ) && ( NUM_DIR_LIGHT_SHADOWS > 0 || NUM_POINT_LIGHT_SHADOWS > 0 ) ) || ( NUM_SPOT_LIGHT_COORDS > 0 )\n	vec3 shadowWorldNormal = inverseTransformDirection( transformedNormal, viewMatrix );\n	vec4 shadowWorldPosition;\n#endif\n#if defined( USE_SHADOWMAP )\n	#if NUM_DIR_LIGHT_SHADOWS > 0\n		#pragma unroll_loop_start\n		for ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\n			shadowWorldPosition = worldPosition + vec4( shadowWorldNormal * directionalLightShadows[ i ].shadowNormalBias, 0 );\n			vDirectionalShadowCoord[ i ] = directionalShadowMatrix[ i ] * shadowWorldPosition;\n		}\n		#pragma unroll_loop_end\n	#endif\n	#if NUM_POINT_LIGHT_SHADOWS > 0\n		#pragma unroll_loop_start\n		for ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\n			shadowWorldPosition = worldPosition + vec4( shadowWorldNormal * pointLightShadows[ i ].shadowNormalBias, 0 );\n			vPointShadowCoord[ i ] = pointShadowMatrix[ i ] * shadowWorldPosition;\n		}\n		#pragma unroll_loop_end\n	#endif\n#endif\n#if NUM_SPOT_LIGHT_COORDS > 0\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_SPOT_LIGHT_COORDS; i ++ ) {\n		shadowWorldPosition = worldPosition;\n		#if ( defined( USE_SHADOWMAP ) && UNROLLED_LOOP_INDEX < NUM_SPOT_LIGHT_SHADOWS )\n			shadowWorldPosition.xyz += shadowWorldNormal * spotLightShadows[ i ].shadowNormalBias;\n		#endif\n		vSpotLightCoord[ i ] = spotLightMatrix[ i ] * shadowWorldPosition;\n	}\n	#pragma unroll_loop_end\n#endif";
var shadowmask_pars_fragment = "float getShadowMask() {\n	float shadow = 1.0;\n	#ifdef USE_SHADOWMAP\n	#if NUM_DIR_LIGHT_SHADOWS > 0\n	DirectionalLightShadow directionalLight;\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_DIR_LIGHT_SHADOWS; i ++ ) {\n		directionalLight = directionalLightShadows[ i ];\n		shadow *= receiveShadow ? getShadow( directionalShadowMap[ i ], directionalLight.shadowMapSize, directionalLight.shadowIntensity, directionalLight.shadowBias, directionalLight.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;\n	}\n	#pragma unroll_loop_end\n	#endif\n	#if NUM_SPOT_LIGHT_SHADOWS > 0\n	SpotLightShadow spotLight;\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_SPOT_LIGHT_SHADOWS; i ++ ) {\n		spotLight = spotLightShadows[ i ];\n		shadow *= receiveShadow ? getShadow( spotShadowMap[ i ], spotLight.shadowMapSize, spotLight.shadowIntensity, spotLight.shadowBias, spotLight.shadowRadius, vSpotLightCoord[ i ] ) : 1.0;\n	}\n	#pragma unroll_loop_end\n	#endif\n	#if NUM_POINT_LIGHT_SHADOWS > 0\n	PointLightShadow pointLight;\n	#pragma unroll_loop_start\n	for ( int i = 0; i < NUM_POINT_LIGHT_SHADOWS; i ++ ) {\n		pointLight = pointLightShadows[ i ];\n		shadow *= receiveShadow ? getPointShadow( pointShadowMap[ i ], pointLight.shadowMapSize, pointLight.shadowIntensity, pointLight.shadowBias, pointLight.shadowRadius, vPointShadowCoord[ i ], pointLight.shadowCameraNear, pointLight.shadowCameraFar ) : 1.0;\n	}\n	#pragma unroll_loop_end\n	#endif\n	#endif\n	return shadow;\n}";
var skinbase_vertex = "#ifdef USE_SKINNING\n	mat4 boneMatX = getBoneMatrix( skinIndex.x );\n	mat4 boneMatY = getBoneMatrix( skinIndex.y );\n	mat4 boneMatZ = getBoneMatrix( skinIndex.z );\n	mat4 boneMatW = getBoneMatrix( skinIndex.w );\n#endif";
var skinning_pars_vertex = "#ifdef USE_SKINNING\n	uniform mat4 bindMatrix;\n	uniform mat4 bindMatrixInverse;\n	uniform highp sampler2D boneTexture;\n	mat4 getBoneMatrix( const in float i ) {\n		int size = textureSize( boneTexture, 0 ).x;\n		int j = int( i ) * 4;\n		int x = j % size;\n		int y = j / size;\n		vec4 v1 = texelFetch( boneTexture, ivec2( x, y ), 0 );\n		vec4 v2 = texelFetch( boneTexture, ivec2( x + 1, y ), 0 );\n		vec4 v3 = texelFetch( boneTexture, ivec2( x + 2, y ), 0 );\n		vec4 v4 = texelFetch( boneTexture, ivec2( x + 3, y ), 0 );\n		return mat4( v1, v2, v3, v4 );\n	}\n#endif";
var skinning_vertex = "#ifdef USE_SKINNING\n	vec4 skinVertex = bindMatrix * vec4( transformed, 1.0 );\n	vec4 skinned = vec4( 0.0 );\n	skinned += boneMatX * skinVertex * skinWeight.x;\n	skinned += boneMatY * skinVertex * skinWeight.y;\n	skinned += boneMatZ * skinVertex * skinWeight.z;\n	skinned += boneMatW * skinVertex * skinWeight.w;\n	transformed = ( bindMatrixInverse * skinned ).xyz;\n#endif";
var skinnormal_vertex = "#ifdef USE_SKINNING\n	mat4 skinMatrix = mat4( 0.0 );\n	skinMatrix += skinWeight.x * boneMatX;\n	skinMatrix += skinWeight.y * boneMatY;\n	skinMatrix += skinWeight.z * boneMatZ;\n	skinMatrix += skinWeight.w * boneMatW;\n	skinMatrix = bindMatrixInverse * skinMatrix * bindMatrix;\n	objectNormal = vec4( skinMatrix * vec4( objectNormal, 0.0 ) ).xyz;\n	#ifdef USE_TANGENT\n		objectTangent = vec4( skinMatrix * vec4( objectTangent, 0.0 ) ).xyz;\n	#endif\n#endif";
var specularmap_fragment = "float specularStrength;\n#ifdef USE_SPECULARMAP\n	vec4 texelSpecular = texture2D( specularMap, vSpecularMapUv );\n	specularStrength = texelSpecular.r;\n#else\n	specularStrength = 1.0;\n#endif";
var specularmap_pars_fragment = "#ifdef USE_SPECULARMAP\n	uniform sampler2D specularMap;\n#endif";
var tonemapping_fragment = "#if defined( TONE_MAPPING )\n	gl_FragColor.rgb = toneMapping( gl_FragColor.rgb );\n#endif";
var tonemapping_pars_fragment = "#ifndef saturate\n#define saturate( a ) clamp( a, 0.0, 1.0 )\n#endif\nuniform float toneMappingExposure;\nvec3 LinearToneMapping( vec3 color ) {\n	return saturate( toneMappingExposure * color );\n}\nvec3 ReinhardToneMapping( vec3 color ) {\n	color *= toneMappingExposure;\n	return saturate( color / ( vec3( 1.0 ) + color ) );\n}\nvec3 CineonToneMapping( vec3 color ) {\n	color *= toneMappingExposure;\n	color = max( vec3( 0.0 ), color - 0.004 );\n	return pow( ( color * ( 6.2 * color + 0.5 ) ) / ( color * ( 6.2 * color + 1.7 ) + 0.06 ), vec3( 2.2 ) );\n}\nvec3 RRTAndODTFit( vec3 v ) {\n	vec3 a = v * ( v + 0.0245786 ) - 0.000090537;\n	vec3 b = v * ( 0.983729 * v + 0.4329510 ) + 0.238081;\n	return a / b;\n}\nvec3 ACESFilmicToneMapping( vec3 color ) {\n	const mat3 ACESInputMat = mat3(\n		vec3( 0.59719, 0.07600, 0.02840 ),		vec3( 0.35458, 0.90834, 0.13383 ),\n		vec3( 0.04823, 0.01566, 0.83777 )\n	);\n	const mat3 ACESOutputMat = mat3(\n		vec3(  1.60475, -0.10208, -0.00327 ),		vec3( -0.53108,  1.10813, -0.07276 ),\n		vec3( -0.07367, -0.00605,  1.07602 )\n	);\n	color *= toneMappingExposure / 0.6;\n	color = ACESInputMat * color;\n	color = RRTAndODTFit( color );\n	color = ACESOutputMat * color;\n	return saturate( color );\n}\nconst mat3 LINEAR_REC2020_TO_LINEAR_SRGB = mat3(\n	vec3( 1.6605, - 0.1246, - 0.0182 ),\n	vec3( - 0.5876, 1.1329, - 0.1006 ),\n	vec3( - 0.0728, - 0.0083, 1.1187 )\n);\nconst mat3 LINEAR_SRGB_TO_LINEAR_REC2020 = mat3(\n	vec3( 0.6274, 0.0691, 0.0164 ),\n	vec3( 0.3293, 0.9195, 0.0880 ),\n	vec3( 0.0433, 0.0113, 0.8956 )\n);\nvec3 agxDefaultContrastApprox( vec3 x ) {\n	vec3 x2 = x * x;\n	vec3 x4 = x2 * x2;\n	return + 15.5 * x4 * x2\n		- 40.14 * x4 * x\n		+ 31.96 * x4\n		- 6.868 * x2 * x\n		+ 0.4298 * x2\n		+ 0.1191 * x\n		- 0.00232;\n}\nvec3 AgXToneMapping( vec3 color ) {\n	const mat3 AgXInsetMatrix = mat3(\n		vec3( 0.856627153315983, 0.137318972929847, 0.11189821299995 ),\n		vec3( 0.0951212405381588, 0.761241990602591, 0.0767994186031903 ),\n		vec3( 0.0482516061458583, 0.101439036467562, 0.811302368396859 )\n	);\n	const mat3 AgXOutsetMatrix = mat3(\n		vec3( 1.1271005818144368, - 0.1413297634984383, - 0.14132976349843826 ),\n		vec3( - 0.11060664309660323, 1.157823702216272, - 0.11060664309660294 ),\n		vec3( - 0.016493938717834573, - 0.016493938717834257, 1.2519364065950405 )\n	);\n	const float AgxMinEv = - 12.47393;	const float AgxMaxEv = 4.026069;\n	color *= toneMappingExposure;\n	color = LINEAR_SRGB_TO_LINEAR_REC2020 * color;\n	color = AgXInsetMatrix * color;\n	color = max( color, 1e-10 );	color = log2( color );\n	color = ( color - AgxMinEv ) / ( AgxMaxEv - AgxMinEv );\n	color = clamp( color, 0.0, 1.0 );\n	color = agxDefaultContrastApprox( color );\n	color = AgXOutsetMatrix * color;\n	color = pow( max( vec3( 0.0 ), color ), vec3( 2.2 ) );\n	color = LINEAR_REC2020_TO_LINEAR_SRGB * color;\n	color = clamp( color, 0.0, 1.0 );\n	return color;\n}\nvec3 NeutralToneMapping( vec3 color ) {\n	const float StartCompression = 0.8 - 0.04;\n	const float Desaturation = 0.15;\n	color *= toneMappingExposure;\n	float x = min( color.r, min( color.g, color.b ) );\n	float offset = x < 0.08 ? x - 6.25 * x * x : 0.04;\n	color -= offset;\n	float peak = max( color.r, max( color.g, color.b ) );\n	if ( peak < StartCompression ) return color;\n	float d = 1. - StartCompression;\n	float newPeak = 1. - d * d / ( peak + d - StartCompression );\n	color *= newPeak / peak;\n	float g = 1. - 1. / ( Desaturation * ( peak - newPeak ) + 1. );\n	return mix( color, vec3( newPeak ), g );\n}\nvec3 CustomToneMapping( vec3 color ) { return color; }";
var transmission_fragment = "#ifdef USE_TRANSMISSION\n	material.transmission = transmission;\n	material.transmissionAlpha = 1.0;\n	material.thickness = thickness;\n	material.attenuationDistance = attenuationDistance;\n	material.attenuationColor = attenuationColor;\n	#ifdef USE_TRANSMISSIONMAP\n		material.transmission *= texture2D( transmissionMap, vTransmissionMapUv ).r;\n	#endif\n	#ifdef USE_THICKNESSMAP\n		material.thickness *= texture2D( thicknessMap, vThicknessMapUv ).g;\n	#endif\n	vec3 pos = vWorldPosition;\n	vec3 v = normalize( cameraPosition - pos );\n	vec3 n = inverseTransformDirection( normal, viewMatrix );\n	vec4 transmitted = getIBLVolumeRefraction(\n		n, v, material.roughness, material.diffuseColor, material.specularColor, material.specularF90,\n		pos, modelMatrix, viewMatrix, projectionMatrix, material.dispersion, material.ior, material.thickness,\n		material.attenuationColor, material.attenuationDistance );\n	material.transmissionAlpha = mix( material.transmissionAlpha, transmitted.a, material.transmission );\n	totalDiffuse = mix( totalDiffuse, transmitted.rgb, material.transmission );\n#endif";
var transmission_pars_fragment = "#ifdef USE_TRANSMISSION\n	uniform float transmission;\n	uniform float thickness;\n	uniform float attenuationDistance;\n	uniform vec3 attenuationColor;\n	#ifdef USE_TRANSMISSIONMAP\n		uniform sampler2D transmissionMap;\n	#endif\n	#ifdef USE_THICKNESSMAP\n		uniform sampler2D thicknessMap;\n	#endif\n	uniform vec2 transmissionSamplerSize;\n	uniform sampler2D transmissionSamplerMap;\n	uniform mat4 modelMatrix;\n	uniform mat4 projectionMatrix;\n	varying vec3 vWorldPosition;\n	float w0( float a ) {\n		return ( 1.0 / 6.0 ) * ( a * ( a * ( - a + 3.0 ) - 3.0 ) + 1.0 );\n	}\n	float w1( float a ) {\n		return ( 1.0 / 6.0 ) * ( a *  a * ( 3.0 * a - 6.0 ) + 4.0 );\n	}\n	float w2( float a ){\n		return ( 1.0 / 6.0 ) * ( a * ( a * ( - 3.0 * a + 3.0 ) + 3.0 ) + 1.0 );\n	}\n	float w3( float a ) {\n		return ( 1.0 / 6.0 ) * ( a * a * a );\n	}\n	float g0( float a ) {\n		return w0( a ) + w1( a );\n	}\n	float g1( float a ) {\n		return w2( a ) + w3( a );\n	}\n	float h0( float a ) {\n		return - 1.0 + w1( a ) / ( w0( a ) + w1( a ) );\n	}\n	float h1( float a ) {\n		return 1.0 + w3( a ) / ( w2( a ) + w3( a ) );\n	}\n	vec4 bicubic( sampler2D tex, vec2 uv, vec4 texelSize, float lod ) {\n		uv = uv * texelSize.zw + 0.5;\n		vec2 iuv = floor( uv );\n		vec2 fuv = fract( uv );\n		float g0x = g0( fuv.x );\n		float g1x = g1( fuv.x );\n		float h0x = h0( fuv.x );\n		float h1x = h1( fuv.x );\n		float h0y = h0( fuv.y );\n		float h1y = h1( fuv.y );\n		vec2 p0 = ( vec2( iuv.x + h0x, iuv.y + h0y ) - 0.5 ) * texelSize.xy;\n		vec2 p1 = ( vec2( iuv.x + h1x, iuv.y + h0y ) - 0.5 ) * texelSize.xy;\n		vec2 p2 = ( vec2( iuv.x + h0x, iuv.y + h1y ) - 0.5 ) * texelSize.xy;\n		vec2 p3 = ( vec2( iuv.x + h1x, iuv.y + h1y ) - 0.5 ) * texelSize.xy;\n		return g0( fuv.y ) * ( g0x * textureLod( tex, p0, lod ) + g1x * textureLod( tex, p1, lod ) ) +\n			g1( fuv.y ) * ( g0x * textureLod( tex, p2, lod ) + g1x * textureLod( tex, p3, lod ) );\n	}\n	vec4 textureBicubic( sampler2D sampler, vec2 uv, float lod ) {\n		vec2 fLodSize = vec2( textureSize( sampler, int( lod ) ) );\n		vec2 cLodSize = vec2( textureSize( sampler, int( lod + 1.0 ) ) );\n		vec2 fLodSizeInv = 1.0 / fLodSize;\n		vec2 cLodSizeInv = 1.0 / cLodSize;\n		vec4 fSample = bicubic( sampler, uv, vec4( fLodSizeInv, fLodSize ), floor( lod ) );\n		vec4 cSample = bicubic( sampler, uv, vec4( cLodSizeInv, cLodSize ), ceil( lod ) );\n		return mix( fSample, cSample, fract( lod ) );\n	}\n	vec3 getVolumeTransmissionRay( const in vec3 n, const in vec3 v, const in float thickness, const in float ior, const in mat4 modelMatrix ) {\n		vec3 refractionVector = refract( - v, normalize( n ), 1.0 / ior );\n		vec3 modelScale;\n		modelScale.x = length( vec3( modelMatrix[ 0 ].xyz ) );\n		modelScale.y = length( vec3( modelMatrix[ 1 ].xyz ) );\n		modelScale.z = length( vec3( modelMatrix[ 2 ].xyz ) );\n		return normalize( refractionVector ) * thickness * modelScale;\n	}\n	float applyIorToRoughness( const in float roughness, const in float ior ) {\n		return roughness * clamp( ior * 2.0 - 2.0, 0.0, 1.0 );\n	}\n	vec4 getTransmissionSample( const in vec2 fragCoord, const in float roughness, const in float ior ) {\n		float lod = log2( transmissionSamplerSize.x ) * applyIorToRoughness( roughness, ior );\n		return textureBicubic( transmissionSamplerMap, fragCoord.xy, lod );\n	}\n	vec3 volumeAttenuation( const in float transmissionDistance, const in vec3 attenuationColor, const in float attenuationDistance ) {\n		if ( isinf( attenuationDistance ) ) {\n			return vec3( 1.0 );\n		} else {\n			vec3 attenuationCoefficient = -log( attenuationColor ) / attenuationDistance;\n			vec3 transmittance = exp( - attenuationCoefficient * transmissionDistance );			return transmittance;\n		}\n	}\n	vec4 getIBLVolumeRefraction( const in vec3 n, const in vec3 v, const in float roughness, const in vec3 diffuseColor,\n		const in vec3 specularColor, const in float specularF90, const in vec3 position, const in mat4 modelMatrix,\n		const in mat4 viewMatrix, const in mat4 projMatrix, const in float dispersion, const in float ior, const in float thickness,\n		const in vec3 attenuationColor, const in float attenuationDistance ) {\n		vec4 transmittedLight;\n		vec3 transmittance;\n		#ifdef USE_DISPERSION\n			float halfSpread = ( ior - 1.0 ) * 0.025 * dispersion;\n			vec3 iors = vec3( ior - halfSpread, ior, ior + halfSpread );\n			for ( int i = 0; i < 3; i ++ ) {\n				vec3 transmissionRay = getVolumeTransmissionRay( n, v, thickness, iors[ i ], modelMatrix );\n				vec3 refractedRayExit = position + transmissionRay;\n		\n				vec4 ndcPos = projMatrix * viewMatrix * vec4( refractedRayExit, 1.0 );\n				vec2 refractionCoords = ndcPos.xy / ndcPos.w;\n				refractionCoords += 1.0;\n				refractionCoords /= 2.0;\n		\n				vec4 transmissionSample = getTransmissionSample( refractionCoords, roughness, iors[ i ] );\n				transmittedLight[ i ] = transmissionSample[ i ];\n				transmittedLight.a += transmissionSample.a;\n				transmittance[ i ] = diffuseColor[ i ] * volumeAttenuation( length( transmissionRay ), attenuationColor, attenuationDistance )[ i ];\n			}\n			transmittedLight.a /= 3.0;\n		\n		#else\n		\n			vec3 transmissionRay = getVolumeTransmissionRay( n, v, thickness, ior, modelMatrix );\n			vec3 refractedRayExit = position + transmissionRay;\n			vec4 ndcPos = projMatrix * viewMatrix * vec4( refractedRayExit, 1.0 );\n			vec2 refractionCoords = ndcPos.xy / ndcPos.w;\n			refractionCoords += 1.0;\n			refractionCoords /= 2.0;\n			transmittedLight = getTransmissionSample( refractionCoords, roughness, ior );\n			transmittance = diffuseColor * volumeAttenuation( length( transmissionRay ), attenuationColor, attenuationDistance );\n		\n		#endif\n		vec3 attenuatedColor = transmittance * transmittedLight.rgb;\n		vec3 F = EnvironmentBRDF( n, v, specularColor, specularF90, roughness );\n		float transmittanceFactor = ( transmittance.r + transmittance.g + transmittance.b ) / 3.0;\n		return vec4( ( 1.0 - F ) * attenuatedColor, 1.0 - ( 1.0 - transmittedLight.a ) * transmittanceFactor );\n	}\n#endif";
var uv_pars_fragment = "#if defined( USE_UV ) || defined( USE_ANISOTROPY )\n	varying vec2 vUv;\n#endif\n#ifdef USE_MAP\n	varying vec2 vMapUv;\n#endif\n#ifdef USE_ALPHAMAP\n	varying vec2 vAlphaMapUv;\n#endif\n#ifdef USE_LIGHTMAP\n	varying vec2 vLightMapUv;\n#endif\n#ifdef USE_AOMAP\n	varying vec2 vAoMapUv;\n#endif\n#ifdef USE_BUMPMAP\n	varying vec2 vBumpMapUv;\n#endif\n#ifdef USE_NORMALMAP\n	varying vec2 vNormalMapUv;\n#endif\n#ifdef USE_EMISSIVEMAP\n	varying vec2 vEmissiveMapUv;\n#endif\n#ifdef USE_METALNESSMAP\n	varying vec2 vMetalnessMapUv;\n#endif\n#ifdef USE_ROUGHNESSMAP\n	varying vec2 vRoughnessMapUv;\n#endif\n#ifdef USE_ANISOTROPYMAP\n	varying vec2 vAnisotropyMapUv;\n#endif\n#ifdef USE_CLEARCOATMAP\n	varying vec2 vClearcoatMapUv;\n#endif\n#ifdef USE_CLEARCOAT_NORMALMAP\n	varying vec2 vClearcoatNormalMapUv;\n#endif\n#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n	varying vec2 vClearcoatRoughnessMapUv;\n#endif\n#ifdef USE_IRIDESCENCEMAP\n	varying vec2 vIridescenceMapUv;\n#endif\n#ifdef USE_IRIDESCENCE_THICKNESSMAP\n	varying vec2 vIridescenceThicknessMapUv;\n#endif\n#ifdef USE_SHEEN_COLORMAP\n	varying vec2 vSheenColorMapUv;\n#endif\n#ifdef USE_SHEEN_ROUGHNESSMAP\n	varying vec2 vSheenRoughnessMapUv;\n#endif\n#ifdef USE_SPECULARMAP\n	varying vec2 vSpecularMapUv;\n#endif\n#ifdef USE_SPECULAR_COLORMAP\n	varying vec2 vSpecularColorMapUv;\n#endif\n#ifdef USE_SPECULAR_INTENSITYMAP\n	varying vec2 vSpecularIntensityMapUv;\n#endif\n#ifdef USE_TRANSMISSIONMAP\n	uniform mat3 transmissionMapTransform;\n	varying vec2 vTransmissionMapUv;\n#endif\n#ifdef USE_THICKNESSMAP\n	uniform mat3 thicknessMapTransform;\n	varying vec2 vThicknessMapUv;\n#endif";
var uv_pars_vertex = "#if defined( USE_UV ) || defined( USE_ANISOTROPY )\n	varying vec2 vUv;\n#endif\n#ifdef USE_MAP\n	uniform mat3 mapTransform;\n	varying vec2 vMapUv;\n#endif\n#ifdef USE_ALPHAMAP\n	uniform mat3 alphaMapTransform;\n	varying vec2 vAlphaMapUv;\n#endif\n#ifdef USE_LIGHTMAP\n	uniform mat3 lightMapTransform;\n	varying vec2 vLightMapUv;\n#endif\n#ifdef USE_AOMAP\n	uniform mat3 aoMapTransform;\n	varying vec2 vAoMapUv;\n#endif\n#ifdef USE_BUMPMAP\n	uniform mat3 bumpMapTransform;\n	varying vec2 vBumpMapUv;\n#endif\n#ifdef USE_NORMALMAP\n	uniform mat3 normalMapTransform;\n	varying vec2 vNormalMapUv;\n#endif\n#ifdef USE_DISPLACEMENTMAP\n	uniform mat3 displacementMapTransform;\n	varying vec2 vDisplacementMapUv;\n#endif\n#ifdef USE_EMISSIVEMAP\n	uniform mat3 emissiveMapTransform;\n	varying vec2 vEmissiveMapUv;\n#endif\n#ifdef USE_METALNESSMAP\n	uniform mat3 metalnessMapTransform;\n	varying vec2 vMetalnessMapUv;\n#endif\n#ifdef USE_ROUGHNESSMAP\n	uniform mat3 roughnessMapTransform;\n	varying vec2 vRoughnessMapUv;\n#endif\n#ifdef USE_ANISOTROPYMAP\n	uniform mat3 anisotropyMapTransform;\n	varying vec2 vAnisotropyMapUv;\n#endif\n#ifdef USE_CLEARCOATMAP\n	uniform mat3 clearcoatMapTransform;\n	varying vec2 vClearcoatMapUv;\n#endif\n#ifdef USE_CLEARCOAT_NORMALMAP\n	uniform mat3 clearcoatNormalMapTransform;\n	varying vec2 vClearcoatNormalMapUv;\n#endif\n#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n	uniform mat3 clearcoatRoughnessMapTransform;\n	varying vec2 vClearcoatRoughnessMapUv;\n#endif\n#ifdef USE_SHEEN_COLORMAP\n	uniform mat3 sheenColorMapTransform;\n	varying vec2 vSheenColorMapUv;\n#endif\n#ifdef USE_SHEEN_ROUGHNESSMAP\n	uniform mat3 sheenRoughnessMapTransform;\n	varying vec2 vSheenRoughnessMapUv;\n#endif\n#ifdef USE_IRIDESCENCEMAP\n	uniform mat3 iridescenceMapTransform;\n	varying vec2 vIridescenceMapUv;\n#endif\n#ifdef USE_IRIDESCENCE_THICKNESSMAP\n	uniform mat3 iridescenceThicknessMapTransform;\n	varying vec2 vIridescenceThicknessMapUv;\n#endif\n#ifdef USE_SPECULARMAP\n	uniform mat3 specularMapTransform;\n	varying vec2 vSpecularMapUv;\n#endif\n#ifdef USE_SPECULAR_COLORMAP\n	uniform mat3 specularColorMapTransform;\n	varying vec2 vSpecularColorMapUv;\n#endif\n#ifdef USE_SPECULAR_INTENSITYMAP\n	uniform mat3 specularIntensityMapTransform;\n	varying vec2 vSpecularIntensityMapUv;\n#endif\n#ifdef USE_TRANSMISSIONMAP\n	uniform mat3 transmissionMapTransform;\n	varying vec2 vTransmissionMapUv;\n#endif\n#ifdef USE_THICKNESSMAP\n	uniform mat3 thicknessMapTransform;\n	varying vec2 vThicknessMapUv;\n#endif";
var uv_vertex = "#if defined( USE_UV ) || defined( USE_ANISOTROPY )\n	vUv = vec3( uv, 1 ).xy;\n#endif\n#ifdef USE_MAP\n	vMapUv = ( mapTransform * vec3( MAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_ALPHAMAP\n	vAlphaMapUv = ( alphaMapTransform * vec3( ALPHAMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_LIGHTMAP\n	vLightMapUv = ( lightMapTransform * vec3( LIGHTMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_AOMAP\n	vAoMapUv = ( aoMapTransform * vec3( AOMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_BUMPMAP\n	vBumpMapUv = ( bumpMapTransform * vec3( BUMPMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_NORMALMAP\n	vNormalMapUv = ( normalMapTransform * vec3( NORMALMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_DISPLACEMENTMAP\n	vDisplacementMapUv = ( displacementMapTransform * vec3( DISPLACEMENTMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_EMISSIVEMAP\n	vEmissiveMapUv = ( emissiveMapTransform * vec3( EMISSIVEMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_METALNESSMAP\n	vMetalnessMapUv = ( metalnessMapTransform * vec3( METALNESSMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_ROUGHNESSMAP\n	vRoughnessMapUv = ( roughnessMapTransform * vec3( ROUGHNESSMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_ANISOTROPYMAP\n	vAnisotropyMapUv = ( anisotropyMapTransform * vec3( ANISOTROPYMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_CLEARCOATMAP\n	vClearcoatMapUv = ( clearcoatMapTransform * vec3( CLEARCOATMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_CLEARCOAT_NORMALMAP\n	vClearcoatNormalMapUv = ( clearcoatNormalMapTransform * vec3( CLEARCOAT_NORMALMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_CLEARCOAT_ROUGHNESSMAP\n	vClearcoatRoughnessMapUv = ( clearcoatRoughnessMapTransform * vec3( CLEARCOAT_ROUGHNESSMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_IRIDESCENCEMAP\n	vIridescenceMapUv = ( iridescenceMapTransform * vec3( IRIDESCENCEMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_IRIDESCENCE_THICKNESSMAP\n	vIridescenceThicknessMapUv = ( iridescenceThicknessMapTransform * vec3( IRIDESCENCE_THICKNESSMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_SHEEN_COLORMAP\n	vSheenColorMapUv = ( sheenColorMapTransform * vec3( SHEEN_COLORMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_SHEEN_ROUGHNESSMAP\n	vSheenRoughnessMapUv = ( sheenRoughnessMapTransform * vec3( SHEEN_ROUGHNESSMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_SPECULARMAP\n	vSpecularMapUv = ( specularMapTransform * vec3( SPECULARMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_SPECULAR_COLORMAP\n	vSpecularColorMapUv = ( specularColorMapTransform * vec3( SPECULAR_COLORMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_SPECULAR_INTENSITYMAP\n	vSpecularIntensityMapUv = ( specularIntensityMapTransform * vec3( SPECULAR_INTENSITYMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_TRANSMISSIONMAP\n	vTransmissionMapUv = ( transmissionMapTransform * vec3( TRANSMISSIONMAP_UV, 1 ) ).xy;\n#endif\n#ifdef USE_THICKNESSMAP\n	vThicknessMapUv = ( thicknessMapTransform * vec3( THICKNESSMAP_UV, 1 ) ).xy;\n#endif";
var worldpos_vertex = "#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP ) || defined ( USE_TRANSMISSION ) || NUM_SPOT_LIGHT_COORDS > 0\n	vec4 worldPosition = vec4( transformed, 1.0 );\n	#ifdef USE_BATCHING\n		worldPosition = batchingMatrix * worldPosition;\n	#endif\n	#ifdef USE_INSTANCING\n		worldPosition = instanceMatrix * worldPosition;\n	#endif\n	worldPosition = modelMatrix * worldPosition;\n#endif";
const vertex$h = "varying vec2 vUv;\nuniform mat3 uvTransform;\nvoid main() {\n	vUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n	gl_Position = vec4( position.xy, 1.0, 1.0 );\n}";
const fragment$h = "uniform sampler2D t2D;\nuniform float backgroundIntensity;\nvarying vec2 vUv;\nvoid main() {\n	vec4 texColor = texture2D( t2D, vUv );\n	#ifdef DECODE_VIDEO_TEXTURE\n		texColor = vec4( mix( pow( texColor.rgb * 0.9478672986 + vec3( 0.0521327014 ), vec3( 2.4 ) ), texColor.rgb * 0.0773993808, vec3( lessThanEqual( texColor.rgb, vec3( 0.04045 ) ) ) ), texColor.w );\n	#endif\n	texColor.rgb *= backgroundIntensity;\n	gl_FragColor = texColor;\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n}";
const vertex$g = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n	vWorldDirection = transformDirection( position, modelMatrix );\n	#include <begin_vertex>\n	#include <project_vertex>\n	gl_Position.z = gl_Position.w;\n}";
const fragment$g = "#ifdef ENVMAP_TYPE_CUBE\n	uniform samplerCube envMap;\n#elif defined( ENVMAP_TYPE_CUBE_UV )\n	uniform sampler2D envMap;\n#endif\nuniform float flipEnvMap;\nuniform float backgroundBlurriness;\nuniform float backgroundIntensity;\nuniform mat3 backgroundRotation;\nvarying vec3 vWorldDirection;\n#include <cube_uv_reflection_fragment>\nvoid main() {\n	#ifdef ENVMAP_TYPE_CUBE\n		vec4 texColor = textureCube( envMap, backgroundRotation * vec3( flipEnvMap * vWorldDirection.x, vWorldDirection.yz ) );\n	#elif defined( ENVMAP_TYPE_CUBE_UV )\n		vec4 texColor = textureCubeUV( envMap, backgroundRotation * vWorldDirection, backgroundBlurriness );\n	#else\n		vec4 texColor = vec4( 0.0, 0.0, 0.0, 1.0 );\n	#endif\n	texColor.rgb *= backgroundIntensity;\n	gl_FragColor = texColor;\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n}";
const vertex$f = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n	vWorldDirection = transformDirection( position, modelMatrix );\n	#include <begin_vertex>\n	#include <project_vertex>\n	gl_Position.z = gl_Position.w;\n}";
const fragment$f = "uniform samplerCube tCube;\nuniform float tFlip;\nuniform float opacity;\nvarying vec3 vWorldDirection;\nvoid main() {\n	vec4 texColor = textureCube( tCube, vec3( tFlip * vWorldDirection.x, vWorldDirection.yz ) );\n	gl_FragColor = texColor;\n	gl_FragColor.a *= opacity;\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n}";
const vertex$e = "#include <common>\n#include <batching_pars_vertex>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvarying vec2 vHighPrecisionZW;\nvoid main() {\n	#include <uv_vertex>\n	#include <batching_vertex>\n	#include <skinbase_vertex>\n	#include <morphinstance_vertex>\n	#ifdef USE_DISPLACEMENTMAP\n		#include <beginnormal_vertex>\n		#include <morphnormal_vertex>\n		#include <skinnormal_vertex>\n	#endif\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	vHighPrecisionZW = gl_Position.zw;\n}";
const fragment$e = "#if DEPTH_PACKING == 3200\n	uniform float opacity;\n#endif\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <alphahash_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvarying vec2 vHighPrecisionZW;\nvoid main() {\n	vec4 diffuseColor = vec4( 1.0 );\n	#include <clipping_planes_fragment>\n	#if DEPTH_PACKING == 3200\n		diffuseColor.a = opacity;\n	#endif\n	#include <map_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <alphahash_fragment>\n	#include <logdepthbuf_fragment>\n	float fragCoordZ = 0.5 * vHighPrecisionZW[0] / vHighPrecisionZW[1] + 0.5;\n	#if DEPTH_PACKING == 3200\n		gl_FragColor = vec4( vec3( 1.0 - fragCoordZ ), opacity );\n	#elif DEPTH_PACKING == 3201\n		gl_FragColor = packDepthToRGBA( fragCoordZ );\n	#elif DEPTH_PACKING == 3202\n		gl_FragColor = vec4( packDepthToRGB( fragCoordZ ), 1.0 );\n	#elif DEPTH_PACKING == 3203\n		gl_FragColor = vec4( packDepthToRG( fragCoordZ ), 0.0, 1.0 );\n	#endif\n}";
const vertex$d = "#define DISTANCE\nvarying vec3 vWorldPosition;\n#include <common>\n#include <batching_pars_vertex>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <batching_vertex>\n	#include <skinbase_vertex>\n	#include <morphinstance_vertex>\n	#ifdef USE_DISPLACEMENTMAP\n		#include <beginnormal_vertex>\n		#include <morphnormal_vertex>\n		#include <skinnormal_vertex>\n	#endif\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <worldpos_vertex>\n	#include <clipping_planes_vertex>\n	vWorldPosition = worldPosition.xyz;\n}";
const fragment$d = "#define DISTANCE\nuniform vec3 referencePosition;\nuniform float nearDistance;\nuniform float farDistance;\nvarying vec3 vWorldPosition;\n#include <common>\n#include <packing>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <alphahash_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main () {\n	vec4 diffuseColor = vec4( 1.0 );\n	#include <clipping_planes_fragment>\n	#include <map_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <alphahash_fragment>\n	float dist = length( vWorldPosition - referencePosition );\n	dist = ( dist - nearDistance ) / ( farDistance - nearDistance );\n	dist = saturate( dist );\n	gl_FragColor = packDepthToRGBA( dist );\n}";
const vertex$c = "varying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n	vWorldDirection = transformDirection( position, modelMatrix );\n	#include <begin_vertex>\n	#include <project_vertex>\n}";
const fragment$c = "uniform sampler2D tEquirect;\nvarying vec3 vWorldDirection;\n#include <common>\nvoid main() {\n	vec3 direction = normalize( vWorldDirection );\n	vec2 sampleUV = equirectUv( direction );\n	gl_FragColor = texture2D( tEquirect, sampleUV );\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n}";
const vertex$b = "uniform float scale;\nattribute float lineDistance;\nvarying float vLineDistance;\n#include <common>\n#include <uv_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	vLineDistance = scale * lineDistance;\n	#include <uv_vertex>\n	#include <color_vertex>\n	#include <morphinstance_vertex>\n	#include <morphcolor_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <fog_vertex>\n}";
const fragment$b = "uniform vec3 diffuse;\nuniform float opacity;\nuniform float dashSize;\nuniform float totalSize;\nvarying float vLineDistance;\n#include <common>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <clipping_planes_fragment>\n	if ( mod( vLineDistance, totalSize ) > dashSize ) {\n		discard;\n	}\n	vec3 outgoingLight = vec3( 0.0 );\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	outgoingLight = diffuseColor.rgb;\n	#include <opaque_fragment>\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n}";
const vertex$a = "#include <common>\n#include <batching_pars_vertex>\n#include <uv_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <color_vertex>\n	#include <morphinstance_vertex>\n	#include <morphcolor_vertex>\n	#include <batching_vertex>\n	#if defined ( USE_ENVMAP ) || defined ( USE_SKINNING )\n		#include <beginnormal_vertex>\n		#include <morphnormal_vertex>\n		#include <skinbase_vertex>\n		#include <skinnormal_vertex>\n		#include <defaultnormal_vertex>\n	#endif\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <worldpos_vertex>\n	#include <envmap_vertex>\n	#include <fog_vertex>\n}";
const fragment$a = "uniform vec3 diffuse;\nuniform float opacity;\n#ifndef FLAT_SHADED\n	varying vec3 vNormal;\n#endif\n#include <common>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <alphahash_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <clipping_planes_fragment>\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <alphahash_fragment>\n	#include <specularmap_fragment>\n	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n	#ifdef USE_LIGHTMAP\n		vec4 lightMapTexel = texture2D( lightMap, vLightMapUv );\n		reflectedLight.indirectDiffuse += lightMapTexel.rgb * lightMapIntensity * RECIPROCAL_PI;\n	#else\n		reflectedLight.indirectDiffuse += vec3( 1.0 );\n	#endif\n	#include <aomap_fragment>\n	reflectedLight.indirectDiffuse *= diffuseColor.rgb;\n	vec3 outgoingLight = reflectedLight.indirectDiffuse;\n	#include <envmap_fragment>\n	#include <opaque_fragment>\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$9 = "#define LAMBERT\nvarying vec3 vViewPosition;\n#include <common>\n#include <batching_pars_vertex>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <color_vertex>\n	#include <morphinstance_vertex>\n	#include <morphcolor_vertex>\n	#include <batching_vertex>\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	vViewPosition = - mvPosition.xyz;\n	#include <worldpos_vertex>\n	#include <envmap_vertex>\n	#include <shadowmap_vertex>\n	#include <fog_vertex>\n}";
const fragment$9 = "#define LAMBERT\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <alphahash_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <normal_pars_fragment>\n#include <lights_lambert_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <clipping_planes_fragment>\n	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n	vec3 totalEmissiveRadiance = emissive;\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <alphahash_fragment>\n	#include <specularmap_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	#include <emissivemap_fragment>\n	#include <lights_lambert_fragment>\n	#include <lights_fragment_begin>\n	#include <lights_fragment_maps>\n	#include <lights_fragment_end>\n	#include <aomap_fragment>\n	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n	#include <envmap_fragment>\n	#include <opaque_fragment>\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$8 = "#define MATCAP\nvarying vec3 vViewPosition;\n#include <common>\n#include <batching_pars_vertex>\n#include <uv_pars_vertex>\n#include <color_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <color_vertex>\n	#include <morphinstance_vertex>\n	#include <morphcolor_vertex>\n	#include <batching_vertex>\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <fog_vertex>\n	vViewPosition = - mvPosition.xyz;\n}";
const fragment$8 = "#define MATCAP\nuniform vec3 diffuse;\nuniform float opacity;\nuniform sampler2D matcap;\nvarying vec3 vViewPosition;\n#include <common>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <alphahash_pars_fragment>\n#include <fog_pars_fragment>\n#include <normal_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <clipping_planes_fragment>\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <alphahash_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	vec3 viewDir = normalize( vViewPosition );\n	vec3 x = normalize( vec3( viewDir.z, 0.0, - viewDir.x ) );\n	vec3 y = cross( viewDir, x );\n	vec2 uv = vec2( dot( x, normal ), dot( y, normal ) ) * 0.495 + 0.5;\n	#ifdef USE_MATCAP\n		vec4 matcapColor = texture2D( matcap, uv );\n	#else\n		vec4 matcapColor = vec4( vec3( mix( 0.2, 0.8, uv.y ) ), 1.0 );\n	#endif\n	vec3 outgoingLight = diffuseColor.rgb * matcapColor.rgb;\n	#include <opaque_fragment>\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$7 = "#define NORMAL\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP_TANGENTSPACE )\n	varying vec3 vViewPosition;\n#endif\n#include <common>\n#include <batching_pars_vertex>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <batching_vertex>\n	#include <beginnormal_vertex>\n	#include <morphinstance_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP_TANGENTSPACE )\n	vViewPosition = - mvPosition.xyz;\n#endif\n}";
const fragment$7 = "#define NORMAL\nuniform float opacity;\n#if defined( FLAT_SHADED ) || defined( USE_BUMPMAP ) || defined( USE_NORMALMAP_TANGENTSPACE )\n	varying vec3 vViewPosition;\n#endif\n#include <packing>\n#include <uv_pars_fragment>\n#include <normal_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	vec4 diffuseColor = vec4( 0.0, 0.0, 0.0, opacity );\n	#include <clipping_planes_fragment>\n	#include <logdepthbuf_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	gl_FragColor = vec4( packNormalToRGB( normal ), diffuseColor.a );\n	#ifdef OPAQUE\n		gl_FragColor.a = 1.0;\n	#endif\n}";
const vertex$6 = "#define PHONG\nvarying vec3 vViewPosition;\n#include <common>\n#include <batching_pars_vertex>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <envmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <color_vertex>\n	#include <morphcolor_vertex>\n	#include <batching_vertex>\n	#include <beginnormal_vertex>\n	#include <morphinstance_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	vViewPosition = - mvPosition.xyz;\n	#include <worldpos_vertex>\n	#include <envmap_vertex>\n	#include <shadowmap_vertex>\n	#include <fog_vertex>\n}";
const fragment$6 = "#define PHONG\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform vec3 specular;\nuniform float shininess;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <alphahash_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <normal_pars_fragment>\n#include <lights_phong_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <specularmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <clipping_planes_fragment>\n	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n	vec3 totalEmissiveRadiance = emissive;\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <alphahash_fragment>\n	#include <specularmap_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	#include <emissivemap_fragment>\n	#include <lights_phong_fragment>\n	#include <lights_fragment_begin>\n	#include <lights_fragment_maps>\n	#include <lights_fragment_end>\n	#include <aomap_fragment>\n	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;\n	#include <envmap_fragment>\n	#include <opaque_fragment>\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$5 = "#define STANDARD\nvarying vec3 vViewPosition;\n#ifdef USE_TRANSMISSION\n	varying vec3 vWorldPosition;\n#endif\n#include <common>\n#include <batching_pars_vertex>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <color_vertex>\n	#include <morphinstance_vertex>\n	#include <morphcolor_vertex>\n	#include <batching_vertex>\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	vViewPosition = - mvPosition.xyz;\n	#include <worldpos_vertex>\n	#include <shadowmap_vertex>\n	#include <fog_vertex>\n#ifdef USE_TRANSMISSION\n	vWorldPosition = worldPosition.xyz;\n#endif\n}";
const fragment$5 = "#define STANDARD\n#ifdef PHYSICAL\n	#define IOR\n	#define USE_SPECULAR\n#endif\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float roughness;\nuniform float metalness;\nuniform float opacity;\n#ifdef IOR\n	uniform float ior;\n#endif\n#ifdef USE_SPECULAR\n	uniform float specularIntensity;\n	uniform vec3 specularColor;\n	#ifdef USE_SPECULAR_COLORMAP\n		uniform sampler2D specularColorMap;\n	#endif\n	#ifdef USE_SPECULAR_INTENSITYMAP\n		uniform sampler2D specularIntensityMap;\n	#endif\n#endif\n#ifdef USE_CLEARCOAT\n	uniform float clearcoat;\n	uniform float clearcoatRoughness;\n#endif\n#ifdef USE_DISPERSION\n	uniform float dispersion;\n#endif\n#ifdef USE_IRIDESCENCE\n	uniform float iridescence;\n	uniform float iridescenceIOR;\n	uniform float iridescenceThicknessMinimum;\n	uniform float iridescenceThicknessMaximum;\n#endif\n#ifdef USE_SHEEN\n	uniform vec3 sheenColor;\n	uniform float sheenRoughness;\n	#ifdef USE_SHEEN_COLORMAP\n		uniform sampler2D sheenColorMap;\n	#endif\n	#ifdef USE_SHEEN_ROUGHNESSMAP\n		uniform sampler2D sheenRoughnessMap;\n	#endif\n#endif\n#ifdef USE_ANISOTROPY\n	uniform vec2 anisotropyVector;\n	#ifdef USE_ANISOTROPYMAP\n		uniform sampler2D anisotropyMap;\n	#endif\n#endif\nvarying vec3 vViewPosition;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <alphahash_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <iridescence_fragment>\n#include <cube_uv_reflection_fragment>\n#include <envmap_common_pars_fragment>\n#include <envmap_physical_pars_fragment>\n#include <fog_pars_fragment>\n#include <lights_pars_begin>\n#include <normal_pars_fragment>\n#include <lights_physical_pars_fragment>\n#include <transmission_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <clearcoat_pars_fragment>\n#include <iridescence_pars_fragment>\n#include <roughnessmap_pars_fragment>\n#include <metalnessmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <clipping_planes_fragment>\n	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n	vec3 totalEmissiveRadiance = emissive;\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <alphahash_fragment>\n	#include <roughnessmap_fragment>\n	#include <metalnessmap_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	#include <clearcoat_normal_fragment_begin>\n	#include <clearcoat_normal_fragment_maps>\n	#include <emissivemap_fragment>\n	#include <lights_physical_fragment>\n	#include <lights_fragment_begin>\n	#include <lights_fragment_maps>\n	#include <lights_fragment_end>\n	#include <aomap_fragment>\n	vec3 totalDiffuse = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse;\n	vec3 totalSpecular = reflectedLight.directSpecular + reflectedLight.indirectSpecular;\n	#include <transmission_fragment>\n	vec3 outgoingLight = totalDiffuse + totalSpecular + totalEmissiveRadiance;\n	#ifdef USE_SHEEN\n		float sheenEnergyComp = 1.0 - 0.157 * max3( material.sheenColor );\n		outgoingLight = outgoingLight * sheenEnergyComp + sheenSpecularDirect + sheenSpecularIndirect;\n	#endif\n	#ifdef USE_CLEARCOAT\n		float dotNVcc = saturate( dot( geometryClearcoatNormal, geometryViewDir ) );\n		vec3 Fcc = F_Schlick( material.clearcoatF0, material.clearcoatF90, dotNVcc );\n		outgoingLight = outgoingLight * ( 1.0 - material.clearcoat * Fcc ) + ( clearcoatSpecularDirect + clearcoatSpecularIndirect ) * material.clearcoat;\n	#endif\n	#include <opaque_fragment>\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$4 = "#define TOON\nvarying vec3 vViewPosition;\n#include <common>\n#include <batching_pars_vertex>\n#include <uv_pars_vertex>\n#include <displacementmap_pars_vertex>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <normal_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <shadowmap_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	#include <color_vertex>\n	#include <morphinstance_vertex>\n	#include <morphcolor_vertex>\n	#include <batching_vertex>\n	#include <beginnormal_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <normal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <displacementmap_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	vViewPosition = - mvPosition.xyz;\n	#include <worldpos_vertex>\n	#include <shadowmap_vertex>\n	#include <fog_vertex>\n}";
const fragment$4 = "#define TOON\nuniform vec3 diffuse;\nuniform vec3 emissive;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <dithering_pars_fragment>\n#include <color_pars_fragment>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <alphahash_pars_fragment>\n#include <aomap_pars_fragment>\n#include <lightmap_pars_fragment>\n#include <emissivemap_pars_fragment>\n#include <gradientmap_pars_fragment>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <normal_pars_fragment>\n#include <lights_toon_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <bumpmap_pars_fragment>\n#include <normalmap_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <clipping_planes_fragment>\n	ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );\n	vec3 totalEmissiveRadiance = emissive;\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <color_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <alphahash_fragment>\n	#include <normal_fragment_begin>\n	#include <normal_fragment_maps>\n	#include <emissivemap_fragment>\n	#include <lights_toon_fragment>\n	#include <lights_fragment_begin>\n	#include <lights_fragment_maps>\n	#include <lights_fragment_end>\n	#include <aomap_fragment>\n	vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + totalEmissiveRadiance;\n	#include <opaque_fragment>\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n	#include <dithering_fragment>\n}";
const vertex$3 = "uniform float size;\nuniform float scale;\n#include <common>\n#include <color_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\n#ifdef USE_POINTS_UV\n	varying vec2 vUv;\n	uniform mat3 uvTransform;\n#endif\nvoid main() {\n	#ifdef USE_POINTS_UV\n		vUv = ( uvTransform * vec3( uv, 1 ) ).xy;\n	#endif\n	#include <color_vertex>\n	#include <morphinstance_vertex>\n	#include <morphcolor_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <project_vertex>\n	gl_PointSize = size;\n	#ifdef USE_SIZEATTENUATION\n		bool isPerspective = isPerspectiveMatrix( projectionMatrix );\n		if ( isPerspective ) gl_PointSize *= ( scale / - mvPosition.z );\n	#endif\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <worldpos_vertex>\n	#include <fog_vertex>\n}";
const fragment$3 = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <color_pars_fragment>\n#include <map_particle_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <alphahash_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <clipping_planes_fragment>\n	vec3 outgoingLight = vec3( 0.0 );\n	#include <logdepthbuf_fragment>\n	#include <map_particle_fragment>\n	#include <color_fragment>\n	#include <alphatest_fragment>\n	#include <alphahash_fragment>\n	outgoingLight = diffuseColor.rgb;\n	#include <opaque_fragment>\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n	#include <fog_fragment>\n	#include <premultiplied_alpha_fragment>\n}";
const vertex$2 = "#include <common>\n#include <batching_pars_vertex>\n#include <fog_pars_vertex>\n#include <morphtarget_pars_vertex>\n#include <skinning_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <shadowmap_pars_vertex>\nvoid main() {\n	#include <batching_vertex>\n	#include <beginnormal_vertex>\n	#include <morphinstance_vertex>\n	#include <morphnormal_vertex>\n	#include <skinbase_vertex>\n	#include <skinnormal_vertex>\n	#include <defaultnormal_vertex>\n	#include <begin_vertex>\n	#include <morphtarget_vertex>\n	#include <skinning_vertex>\n	#include <project_vertex>\n	#include <logdepthbuf_vertex>\n	#include <worldpos_vertex>\n	#include <shadowmap_vertex>\n	#include <fog_vertex>\n}";
const fragment$2 = "uniform vec3 color;\nuniform float opacity;\n#include <common>\n#include <packing>\n#include <fog_pars_fragment>\n#include <bsdfs>\n#include <lights_pars_begin>\n#include <logdepthbuf_pars_fragment>\n#include <shadowmap_pars_fragment>\n#include <shadowmask_pars_fragment>\nvoid main() {\n	#include <logdepthbuf_fragment>\n	gl_FragColor = vec4( color, opacity * ( 1.0 - getShadowMask() ) );\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n	#include <fog_fragment>\n}";
const vertex$1 = "uniform float rotation;\nuniform vec2 center;\n#include <common>\n#include <uv_pars_vertex>\n#include <fog_pars_vertex>\n#include <logdepthbuf_pars_vertex>\n#include <clipping_planes_pars_vertex>\nvoid main() {\n	#include <uv_vertex>\n	vec4 mvPosition = modelViewMatrix[ 3 ];\n	vec2 scale = vec2( length( modelMatrix[ 0 ].xyz ), length( modelMatrix[ 1 ].xyz ) );\n	#ifndef USE_SIZEATTENUATION\n		bool isPerspective = isPerspectiveMatrix( projectionMatrix );\n		if ( isPerspective ) scale *= - mvPosition.z;\n	#endif\n	vec2 alignedPosition = ( position.xy - ( center - vec2( 0.5 ) ) ) * scale;\n	vec2 rotatedPosition;\n	rotatedPosition.x = cos( rotation ) * alignedPosition.x - sin( rotation ) * alignedPosition.y;\n	rotatedPosition.y = sin( rotation ) * alignedPosition.x + cos( rotation ) * alignedPosition.y;\n	mvPosition.xy += rotatedPosition;\n	gl_Position = projectionMatrix * mvPosition;\n	#include <logdepthbuf_vertex>\n	#include <clipping_planes_vertex>\n	#include <fog_vertex>\n}";
const fragment$1 = "uniform vec3 diffuse;\nuniform float opacity;\n#include <common>\n#include <uv_pars_fragment>\n#include <map_pars_fragment>\n#include <alphamap_pars_fragment>\n#include <alphatest_pars_fragment>\n#include <alphahash_pars_fragment>\n#include <fog_pars_fragment>\n#include <logdepthbuf_pars_fragment>\n#include <clipping_planes_pars_fragment>\nvoid main() {\n	vec4 diffuseColor = vec4( diffuse, opacity );\n	#include <clipping_planes_fragment>\n	vec3 outgoingLight = vec3( 0.0 );\n	#include <logdepthbuf_fragment>\n	#include <map_fragment>\n	#include <alphamap_fragment>\n	#include <alphatest_fragment>\n	#include <alphahash_fragment>\n	outgoingLight = diffuseColor.rgb;\n	#include <opaque_fragment>\n	#include <tonemapping_fragment>\n	#include <colorspace_fragment>\n	#include <fog_fragment>\n}";
const ShaderChunk = {
  alphahash_fragment,
  alphahash_pars_fragment,
  alphamap_fragment,
  alphamap_pars_fragment,
  alphatest_fragment,
  alphatest_pars_fragment,
  aomap_fragment,
  aomap_pars_fragment,
  batching_pars_vertex,
  batching_vertex,
  begin_vertex,
  beginnormal_vertex,
  bsdfs,
  iridescence_fragment,
  bumpmap_pars_fragment,
  clipping_planes_fragment,
  clipping_planes_pars_fragment,
  clipping_planes_pars_vertex,
  clipping_planes_vertex,
  color_fragment,
  color_pars_fragment,
  color_pars_vertex,
  color_vertex,
  common,
  cube_uv_reflection_fragment,
  defaultnormal_vertex,
  displacementmap_pars_vertex,
  displacementmap_vertex,
  emissivemap_fragment,
  emissivemap_pars_fragment,
  colorspace_fragment,
  colorspace_pars_fragment,
  envmap_fragment,
  envmap_common_pars_fragment,
  envmap_pars_fragment,
  envmap_pars_vertex,
  envmap_physical_pars_fragment,
  envmap_vertex,
  fog_vertex,
  fog_pars_vertex,
  fog_fragment,
  fog_pars_fragment,
  gradientmap_pars_fragment,
  lightmap_pars_fragment,
  lights_lambert_fragment,
  lights_lambert_pars_fragment,
  lights_pars_begin,
  lights_toon_fragment,
  lights_toon_pars_fragment,
  lights_phong_fragment,
  lights_phong_pars_fragment,
  lights_physical_fragment,
  lights_physical_pars_fragment,
  lights_fragment_begin,
  lights_fragment_maps,
  lights_fragment_end,
  logdepthbuf_fragment,
  logdepthbuf_pars_fragment,
  logdepthbuf_pars_vertex,
  logdepthbuf_vertex,
  map_fragment,
  map_pars_fragment,
  map_particle_fragment,
  map_particle_pars_fragment,
  metalnessmap_fragment,
  metalnessmap_pars_fragment,
  morphinstance_vertex,
  morphcolor_vertex,
  morphnormal_vertex,
  morphtarget_pars_vertex,
  morphtarget_vertex,
  normal_fragment_begin,
  normal_fragment_maps,
  normal_pars_fragment,
  normal_pars_vertex,
  normal_vertex,
  normalmap_pars_fragment,
  clearcoat_normal_fragment_begin,
  clearcoat_normal_fragment_maps,
  clearcoat_pars_fragment,
  iridescence_pars_fragment,
  opaque_fragment,
  packing,
  premultiplied_alpha_fragment,
  project_vertex,
  dithering_fragment,
  dithering_pars_fragment,
  roughnessmap_fragment,
  roughnessmap_pars_fragment,
  shadowmap_pars_fragment,
  shadowmap_pars_vertex,
  shadowmap_vertex,
  shadowmask_pars_fragment,
  skinbase_vertex,
  skinning_pars_vertex,
  skinning_vertex,
  skinnormal_vertex,
  specularmap_fragment,
  specularmap_pars_fragment,
  tonemapping_fragment,
  tonemapping_pars_fragment,
  transmission_fragment,
  transmission_pars_fragment,
  uv_pars_fragment,
  uv_pars_vertex,
  uv_vertex,
  worldpos_vertex,
  background_vert: vertex$h,
  background_frag: fragment$h,
  backgroundCube_vert: vertex$g,
  backgroundCube_frag: fragment$g,
  cube_vert: vertex$f,
  cube_frag: fragment$f,
  depth_vert: vertex$e,
  depth_frag: fragment$e,
  distanceRGBA_vert: vertex$d,
  distanceRGBA_frag: fragment$d,
  equirect_vert: vertex$c,
  equirect_frag: fragment$c,
  linedashed_vert: vertex$b,
  linedashed_frag: fragment$b,
  meshbasic_vert: vertex$a,
  meshbasic_frag: fragment$a,
  meshlambert_vert: vertex$9,
  meshlambert_frag: fragment$9,
  meshmatcap_vert: vertex$8,
  meshmatcap_frag: fragment$8,
  meshnormal_vert: vertex$7,
  meshnormal_frag: fragment$7,
  meshphong_vert: vertex$6,
  meshphong_frag: fragment$6,
  meshphysical_vert: vertex$5,
  meshphysical_frag: fragment$5,
  meshtoon_vert: vertex$4,
  meshtoon_frag: fragment$4,
  points_vert: vertex$3,
  points_frag: fragment$3,
  shadow_vert: vertex$2,
  shadow_frag: fragment$2,
  sprite_vert: vertex$1,
  sprite_frag: fragment$1
};
const UniformsLib = {
  common: {
    diffuse: { value: /* @__PURE__ */ new Color(16777215) },
    opacity: { value: 1 },
    map: { value: null },
    mapTransform: { value: /* @__PURE__ */ new Matrix3() },
    alphaMap: { value: null },
    alphaMapTransform: { value: /* @__PURE__ */ new Matrix3() },
    alphaTest: { value: 0 }
  },
  specularmap: {
    specularMap: { value: null },
    specularMapTransform: { value: /* @__PURE__ */ new Matrix3() }
  },
  envmap: {
    envMap: { value: null },
    envMapRotation: { value: /* @__PURE__ */ new Matrix3() },
    flipEnvMap: { value: -1 },
    reflectivity: { value: 1 },
    // basic, lambert, phong
    ior: { value: 1.5 },
    // physical
    refractionRatio: { value: 0.98 }
    // basic, lambert, phong
  },
  aomap: {
    aoMap: { value: null },
    aoMapIntensity: { value: 1 },
    aoMapTransform: { value: /* @__PURE__ */ new Matrix3() }
  },
  lightmap: {
    lightMap: { value: null },
    lightMapIntensity: { value: 1 },
    lightMapTransform: { value: /* @__PURE__ */ new Matrix3() }
  },
  bumpmap: {
    bumpMap: { value: null },
    bumpMapTransform: { value: /* @__PURE__ */ new Matrix3() },
    bumpScale: { value: 1 }
  },
  normalmap: {
    normalMap: { value: null },
    normalMapTransform: { value: /* @__PURE__ */ new Matrix3() },
    normalScale: { value: /* @__PURE__ */ new Vector2(1, 1) }
  },
  displacementmap: {
    displacementMap: { value: null },
    displacementMapTransform: { value: /* @__PURE__ */ new Matrix3() },
    displacementScale: { value: 1 },
    displacementBias: { value: 0 }
  },
  emissivemap: {
    emissiveMap: { value: null },
    emissiveMapTransform: { value: /* @__PURE__ */ new Matrix3() }
  },
  metalnessmap: {
    metalnessMap: { value: null },
    metalnessMapTransform: { value: /* @__PURE__ */ new Matrix3() }
  },
  roughnessmap: {
    roughnessMap: { value: null },
    roughnessMapTransform: { value: /* @__PURE__ */ new Matrix3() }
  },
  gradientmap: {
    gradientMap: { value: null }
  },
  fog: {
    fogDensity: { value: 25e-5 },
    fogNear: { value: 1 },
    fogFar: { value: 2e3 },
    fogColor: { value: /* @__PURE__ */ new Color(16777215) }
  },
  lights: {
    ambientLightColor: { value: [] },
    lightProbe: { value: [] },
    directionalLights: { value: [], properties: {
      direction: {},
      color: {}
    } },
    directionalLightShadows: { value: [], properties: {
      shadowIntensity: 1,
      shadowBias: {},
      shadowNormalBias: {},
      shadowRadius: {},
      shadowMapSize: {}
    } },
    directionalShadowMap: { value: [] },
    directionalShadowMatrix: { value: [] },
    spotLights: { value: [], properties: {
      color: {},
      position: {},
      direction: {},
      distance: {},
      coneCos: {},
      penumbraCos: {},
      decay: {}
    } },
    spotLightShadows: { value: [], properties: {
      shadowIntensity: 1,
      shadowBias: {},
      shadowNormalBias: {},
      shadowRadius: {},
      shadowMapSize: {}
    } },
    spotLightMap: { value: [] },
    spotShadowMap: { value: [] },
    spotLightMatrix: { value: [] },
    pointLights: { value: [], properties: {
      color: {},
      position: {},
      decay: {},
      distance: {}
    } },
    pointLightShadows: { value: [], properties: {
      shadowIntensity: 1,
      shadowBias: {},
      shadowNormalBias: {},
      shadowRadius: {},
      shadowMapSize: {},
      shadowCameraNear: {},
      shadowCameraFar: {}
    } },
    pointShadowMap: { value: [] },
    pointShadowMatrix: { value: [] },
    hemisphereLights: { value: [], properties: {
      direction: {},
      skyColor: {},
      groundColor: {}
    } },
    // TODO (abelnation): RectAreaLight BRDF data needs to be moved from example to main src
    rectAreaLights: { value: [], properties: {
      color: {},
      position: {},
      width: {},
      height: {}
    } },
    ltc_1: { value: null },
    ltc_2: { value: null }
  },
  points: {
    diffuse: { value: /* @__PURE__ */ new Color(16777215) },
    opacity: { value: 1 },
    size: { value: 1 },
    scale: { value: 1 },
    map: { value: null },
    alphaMap: { value: null },
    alphaMapTransform: { value: /* @__PURE__ */ new Matrix3() },
    alphaTest: { value: 0 },
    uvTransform: { value: /* @__PURE__ */ new Matrix3() }
  },
  sprite: {
    diffuse: { value: /* @__PURE__ */ new Color(16777215) },
    opacity: { value: 1 },
    center: { value: /* @__PURE__ */ new Vector2(0.5, 0.5) },
    rotation: { value: 0 },
    map: { value: null },
    mapTransform: { value: /* @__PURE__ */ new Matrix3() },
    alphaMap: { value: null },
    alphaMapTransform: { value: /* @__PURE__ */ new Matrix3() },
    alphaTest: { value: 0 }
  }
};
const ShaderLib = {
  basic: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.common,
      UniformsLib.specularmap,
      UniformsLib.envmap,
      UniformsLib.aomap,
      UniformsLib.lightmap,
      UniformsLib.fog
    ]),
    vertexShader: ShaderChunk.meshbasic_vert,
    fragmentShader: ShaderChunk.meshbasic_frag
  },
  lambert: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.common,
      UniformsLib.specularmap,
      UniformsLib.envmap,
      UniformsLib.aomap,
      UniformsLib.lightmap,
      UniformsLib.emissivemap,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      UniformsLib.fog,
      UniformsLib.lights,
      {
        emissive: { value: /* @__PURE__ */ new Color(0) }
      }
    ]),
    vertexShader: ShaderChunk.meshlambert_vert,
    fragmentShader: ShaderChunk.meshlambert_frag
  },
  phong: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.common,
      UniformsLib.specularmap,
      UniformsLib.envmap,
      UniformsLib.aomap,
      UniformsLib.lightmap,
      UniformsLib.emissivemap,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      UniformsLib.fog,
      UniformsLib.lights,
      {
        emissive: { value: /* @__PURE__ */ new Color(0) },
        specular: { value: /* @__PURE__ */ new Color(1118481) },
        shininess: { value: 30 }
      }
    ]),
    vertexShader: ShaderChunk.meshphong_vert,
    fragmentShader: ShaderChunk.meshphong_frag
  },
  standard: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.common,
      UniformsLib.envmap,
      UniformsLib.aomap,
      UniformsLib.lightmap,
      UniformsLib.emissivemap,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      UniformsLib.roughnessmap,
      UniformsLib.metalnessmap,
      UniformsLib.fog,
      UniformsLib.lights,
      {
        emissive: { value: /* @__PURE__ */ new Color(0) },
        roughness: { value: 1 },
        metalness: { value: 0 },
        envMapIntensity: { value: 1 }
      }
    ]),
    vertexShader: ShaderChunk.meshphysical_vert,
    fragmentShader: ShaderChunk.meshphysical_frag
  },
  toon: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.common,
      UniformsLib.aomap,
      UniformsLib.lightmap,
      UniformsLib.emissivemap,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      UniformsLib.gradientmap,
      UniformsLib.fog,
      UniformsLib.lights,
      {
        emissive: { value: /* @__PURE__ */ new Color(0) }
      }
    ]),
    vertexShader: ShaderChunk.meshtoon_vert,
    fragmentShader: ShaderChunk.meshtoon_frag
  },
  matcap: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.common,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      UniformsLib.fog,
      {
        matcap: { value: null }
      }
    ]),
    vertexShader: ShaderChunk.meshmatcap_vert,
    fragmentShader: ShaderChunk.meshmatcap_frag
  },
  points: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.points,
      UniformsLib.fog
    ]),
    vertexShader: ShaderChunk.points_vert,
    fragmentShader: ShaderChunk.points_frag
  },
  dashed: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.common,
      UniformsLib.fog,
      {
        scale: { value: 1 },
        dashSize: { value: 1 },
        totalSize: { value: 2 }
      }
    ]),
    vertexShader: ShaderChunk.linedashed_vert,
    fragmentShader: ShaderChunk.linedashed_frag
  },
  depth: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.common,
      UniformsLib.displacementmap
    ]),
    vertexShader: ShaderChunk.depth_vert,
    fragmentShader: ShaderChunk.depth_frag
  },
  normal: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.common,
      UniformsLib.bumpmap,
      UniformsLib.normalmap,
      UniformsLib.displacementmap,
      {
        opacity: { value: 1 }
      }
    ]),
    vertexShader: ShaderChunk.meshnormal_vert,
    fragmentShader: ShaderChunk.meshnormal_frag
  },
  sprite: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.sprite,
      UniformsLib.fog
    ]),
    vertexShader: ShaderChunk.sprite_vert,
    fragmentShader: ShaderChunk.sprite_frag
  },
  background: {
    uniforms: {
      uvTransform: { value: /* @__PURE__ */ new Matrix3() },
      t2D: { value: null },
      backgroundIntensity: { value: 1 }
    },
    vertexShader: ShaderChunk.background_vert,
    fragmentShader: ShaderChunk.background_frag
  },
  backgroundCube: {
    uniforms: {
      envMap: { value: null },
      flipEnvMap: { value: -1 },
      backgroundBlurriness: { value: 0 },
      backgroundIntensity: { value: 1 },
      backgroundRotation: { value: /* @__PURE__ */ new Matrix3() }
    },
    vertexShader: ShaderChunk.backgroundCube_vert,
    fragmentShader: ShaderChunk.backgroundCube_frag
  },
  cube: {
    uniforms: {
      tCube: { value: null },
      tFlip: { value: -1 },
      opacity: { value: 1 }
    },
    vertexShader: ShaderChunk.cube_vert,
    fragmentShader: ShaderChunk.cube_frag
  },
  equirect: {
    uniforms: {
      tEquirect: { value: null }
    },
    vertexShader: ShaderChunk.equirect_vert,
    fragmentShader: ShaderChunk.equirect_frag
  },
  distanceRGBA: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.common,
      UniformsLib.displacementmap,
      {
        referencePosition: { value: /* @__PURE__ */ new Vector3() },
        nearDistance: { value: 1 },
        farDistance: { value: 1e3 }
      }
    ]),
    vertexShader: ShaderChunk.distanceRGBA_vert,
    fragmentShader: ShaderChunk.distanceRGBA_frag
  },
  shadow: {
    uniforms: /* @__PURE__ */ mergeUniforms([
      UniformsLib.lights,
      UniformsLib.fog,
      {
        color: { value: /* @__PURE__ */ new Color(0) },
        opacity: { value: 1 }
      }
    ]),
    vertexShader: ShaderChunk.shadow_vert,
    fragmentShader: ShaderChunk.shadow_frag
  }
};
ShaderLib.physical = {
  uniforms: /* @__PURE__ */ mergeUniforms([
    ShaderLib.standard.uniforms,
    {
      clearcoat: { value: 0 },
      clearcoatMap: { value: null },
      clearcoatMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      clearcoatNormalMap: { value: null },
      clearcoatNormalMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      clearcoatNormalScale: { value: /* @__PURE__ */ new Vector2(1, 1) },
      clearcoatRoughness: { value: 0 },
      clearcoatRoughnessMap: { value: null },
      clearcoatRoughnessMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      dispersion: { value: 0 },
      iridescence: { value: 0 },
      iridescenceMap: { value: null },
      iridescenceMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      iridescenceIOR: { value: 1.3 },
      iridescenceThicknessMinimum: { value: 100 },
      iridescenceThicknessMaximum: { value: 400 },
      iridescenceThicknessMap: { value: null },
      iridescenceThicknessMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      sheen: { value: 0 },
      sheenColor: { value: /* @__PURE__ */ new Color(0) },
      sheenColorMap: { value: null },
      sheenColorMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      sheenRoughness: { value: 1 },
      sheenRoughnessMap: { value: null },
      sheenRoughnessMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      transmission: { value: 0 },
      transmissionMap: { value: null },
      transmissionMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      transmissionSamplerSize: { value: /* @__PURE__ */ new Vector2() },
      transmissionSamplerMap: { value: null },
      thickness: { value: 0 },
      thicknessMap: { value: null },
      thicknessMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      attenuationDistance: { value: 0 },
      attenuationColor: { value: /* @__PURE__ */ new Color(0) },
      specularColor: { value: /* @__PURE__ */ new Color(1, 1, 1) },
      specularColorMap: { value: null },
      specularColorMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      specularIntensity: { value: 1 },
      specularIntensityMap: { value: null },
      specularIntensityMapTransform: { value: /* @__PURE__ */ new Matrix3() },
      anisotropyVector: { value: /* @__PURE__ */ new Vector2() },
      anisotropyMap: { value: null },
      anisotropyMapTransform: { value: /* @__PURE__ */ new Matrix3() }
    }
  ]),
  vertexShader: ShaderChunk.meshphysical_vert,
  fragmentShader: ShaderChunk.meshphysical_frag
};
const _rgb = { r: 0, b: 0, g: 0 };
const _e1$1 = /* @__PURE__ */ new Euler();
const _m1$1 = /* @__PURE__ */ new Matrix4();
function WebGLBackground(renderer, cubemaps, cubeuvmaps, state, objects, alpha, premultipliedAlpha) {
  const clearColor = new Color(0);
  let clearAlpha = alpha === true ? 0 : 1;
  let planeMesh;
  let boxMesh;
  let currentBackground = null;
  let currentBackgroundVersion = 0;
  let currentTonemapping = null;
  function getBackground(scene) {
    let background = scene.isScene === true ? scene.background : null;
    if (background && background.isTexture) {
      const usePMREM = scene.backgroundBlurriness > 0;
      background = (usePMREM ? cubeuvmaps : cubemaps).get(background);
    }
    return background;
  }
  __name(getBackground, "getBackground");
  function render(scene) {
    let forceClear = false;
    const background = getBackground(scene);
    if (background === null) {
      setClear(clearColor, clearAlpha);
    } else if (background && background.isColor) {
      setClear(background, 1);
      forceClear = true;
    }
    const environmentBlendMode = renderer.xr.getEnvironmentBlendMode();
    if (environmentBlendMode === "additive") {
      state.buffers.color.setClear(0, 0, 0, 1, premultipliedAlpha);
    } else if (environmentBlendMode === "alpha-blend") {
      state.buffers.color.setClear(0, 0, 0, 0, premultipliedAlpha);
    }
    if (renderer.autoClear || forceClear) {
      state.buffers.depth.setTest(true);
      state.buffers.depth.setMask(true);
      state.buffers.color.setMask(true);
      renderer.clear(renderer.autoClearColor, renderer.autoClearDepth, renderer.autoClearStencil);
    }
  }
  __name(render, "render");
  function addToRenderList(renderList, scene) {
    const background = getBackground(scene);
    if (background && (background.isCubeTexture || background.mapping === CubeUVReflectionMapping)) {
      if (boxMesh === void 0) {
        boxMesh = new Mesh(
          new BoxGeometry(1, 1, 1),
          new ShaderMaterial({
            name: "BackgroundCubeMaterial",
            uniforms: cloneUniforms(ShaderLib.backgroundCube.uniforms),
            vertexShader: ShaderLib.backgroundCube.vertexShader,
            fragmentShader: ShaderLib.backgroundCube.fragmentShader,
            side: BackSide,
            depthTest: false,
            depthWrite: false,
            fog: false
          })
        );
        boxMesh.geometry.deleteAttribute("normal");
        boxMesh.geometry.deleteAttribute("uv");
        boxMesh.onBeforeRender = function(renderer2, scene2, camera) {
          this.matrixWorld.copyPosition(camera.matrixWorld);
        };
        Object.defineProperty(boxMesh.material, "envMap", {
          get: /* @__PURE__ */ __name(function() {
            return this.uniforms.envMap.value;
          }, "get")
        });
        objects.update(boxMesh);
      }
      _e1$1.copy(scene.backgroundRotation);
      _e1$1.x *= -1;
      _e1$1.y *= -1;
      _e1$1.z *= -1;
      if (background.isCubeTexture && background.isRenderTargetTexture === false) {
        _e1$1.y *= -1;
        _e1$1.z *= -1;
      }
      boxMesh.material.uniforms.envMap.value = background;
      boxMesh.material.uniforms.flipEnvMap.value = background.isCubeTexture && background.isRenderTargetTexture === false ? -1 : 1;
      boxMesh.material.uniforms.backgroundBlurriness.value = scene.backgroundBlurriness;
      boxMesh.material.uniforms.backgroundIntensity.value = scene.backgroundIntensity;
      boxMesh.material.uniforms.backgroundRotation.value.setFromMatrix4(_m1$1.makeRotationFromEuler(_e1$1));
      boxMesh.material.toneMapped = ColorManagement.getTransfer(background.colorSpace) !== SRGBTransfer;
      if (currentBackground !== background || currentBackgroundVersion !== background.version || currentTonemapping !== renderer.toneMapping) {
        boxMesh.material.needsUpdate = true;
        currentBackground = background;
        currentBackgroundVersion = background.version;
        currentTonemapping = renderer.toneMapping;
      }
      boxMesh.layers.enableAll();
      renderList.unshift(boxMesh, boxMesh.geometry, boxMesh.material, 0, 0, null);
    } else if (background && background.isTexture) {
      if (planeMesh === void 0) {
        planeMesh = new Mesh(
          new PlaneGeometry(2, 2),
          new ShaderMaterial({
            name: "BackgroundMaterial",
            uniforms: cloneUniforms(ShaderLib.background.uniforms),
            vertexShader: ShaderLib.background.vertexShader,
            fragmentShader: ShaderLib.background.fragmentShader,
            side: FrontSide,
            depthTest: false,
            depthWrite: false,
            fog: false
          })
        );
        planeMesh.geometry.deleteAttribute("normal");
        Object.defineProperty(planeMesh.material, "map", {
          get: /* @__PURE__ */ __name(function() {
            return this.uniforms.t2D.value;
          }, "get")
        });
        objects.update(planeMesh);
      }
      planeMesh.material.uniforms.t2D.value = background;
      planeMesh.material.uniforms.backgroundIntensity.value = scene.backgroundIntensity;
      planeMesh.material.toneMapped = ColorManagement.getTransfer(background.colorSpace) !== SRGBTransfer;
      if (background.matrixAutoUpdate === true) {
        background.updateMatrix();
      }
      planeMesh.material.uniforms.uvTransform.value.copy(background.matrix);
      if (currentBackground !== background || currentBackgroundVersion !== background.version || currentTonemapping !== renderer.toneMapping) {
        planeMesh.material.needsUpdate = true;
        currentBackground = background;
        currentBackgroundVersion = background.version;
        currentTonemapping = renderer.toneMapping;
      }
      planeMesh.layers.enableAll();
      renderList.unshift(planeMesh, planeMesh.geometry, planeMesh.material, 0, 0, null);
    }
  }
  __name(addToRenderList, "addToRenderList");
  function setClear(color, alpha2) {
    color.getRGB(_rgb, getUnlitUniformColorSpace(renderer));
    state.buffers.color.setClear(_rgb.r, _rgb.g, _rgb.b, alpha2, premultipliedAlpha);
  }
  __name(setClear, "setClear");
  return {
    getClearColor: /* @__PURE__ */ __name(function() {
      return clearColor;
    }, "getClearColor"),
    setClearColor: /* @__PURE__ */ __name(function(color, alpha2 = 1) {
      clearColor.set(color);
      clearAlpha = alpha2;
      setClear(clearColor, clearAlpha);
    }, "setClearColor"),
    getClearAlpha: /* @__PURE__ */ __name(function() {
      return clearAlpha;
    }, "getClearAlpha"),
    setClearAlpha: /* @__PURE__ */ __name(function(alpha2) {
      clearAlpha = alpha2;
      setClear(clearColor, clearAlpha);
    }, "setClearAlpha"),
    render,
    addToRenderList
  };
}
__name(WebGLBackground, "WebGLBackground");
function WebGLBindingStates(gl, attributes) {
  const maxVertexAttributes = gl.getParameter(gl.MAX_VERTEX_ATTRIBS);
  const bindingStates = {};
  const defaultState = createBindingState(null);
  let currentState = defaultState;
  let forceUpdate = false;
  function setup(object, material, program, geometry, index) {
    let updateBuffers = false;
    const state = getBindingState(geometry, program, material);
    if (currentState !== state) {
      currentState = state;
      bindVertexArrayObject(currentState.object);
    }
    updateBuffers = needsUpdate(object, geometry, program, index);
    if (updateBuffers) saveCache(object, geometry, program, index);
    if (index !== null) {
      attributes.update(index, gl.ELEMENT_ARRAY_BUFFER);
    }
    if (updateBuffers || forceUpdate) {
      forceUpdate = false;
      setupVertexAttributes(object, material, program, geometry);
      if (index !== null) {
        gl.bindBuffer(gl.ELEMENT_ARRAY_BUFFER, attributes.get(index).buffer);
      }
    }
  }
  __name(setup, "setup");
  function createVertexArrayObject() {
    return gl.createVertexArray();
  }
  __name(createVertexArrayObject, "createVertexArrayObject");
  function bindVertexArrayObject(vao) {
    return gl.bindVertexArray(vao);
  }
  __name(bindVertexArrayObject, "bindVertexArrayObject");
  function deleteVertexArrayObject(vao) {
    return gl.deleteVertexArray(vao);
  }
  __name(deleteVertexArrayObject, "deleteVertexArrayObject");
  function getBindingState(geometry, program, material) {
    const wireframe = material.wireframe === true;
    let programMap = bindingStates[geometry.id];
    if (programMap === void 0) {
      programMap = {};
      bindingStates[geometry.id] = programMap;
    }
    let stateMap = programMap[program.id];
    if (stateMap === void 0) {
      stateMap = {};
      programMap[program.id] = stateMap;
    }
    let state = stateMap[wireframe];
    if (state === void 0) {
      state = createBindingState(createVertexArrayObject());
      stateMap[wireframe] = state;
    }
    return state;
  }
  __name(getBindingState, "getBindingState");
  function createBindingState(vao) {
    const newAttributes = [];
    const enabledAttributes = [];
    const attributeDivisors = [];
    for (let i = 0; i < maxVertexAttributes; i++) {
      newAttributes[i] = 0;
      enabledAttributes[i] = 0;
      attributeDivisors[i] = 0;
    }
    return {
      // for backward compatibility on non-VAO support browser
      geometry: null,
      program: null,
      wireframe: false,
      newAttributes,
      enabledAttributes,
      attributeDivisors,
      object: vao,
      attributes: {},
      index: null
    };
  }
  __name(createBindingState, "createBindingState");
  function needsUpdate(object, geometry, program, index) {
    const cachedAttributes = currentState.attributes;
    const geometryAttributes = geometry.attributes;
    let attributesNum = 0;
    const programAttributes = program.getAttributes();
    for (const name in programAttributes) {
      const programAttribute = programAttributes[name];
      if (programAttribute.location >= 0) {
        const cachedAttribute = cachedAttributes[name];
        let geometryAttribute = geometryAttributes[name];
        if (geometryAttribute === void 0) {
          if (name === "instanceMatrix" && object.instanceMatrix) geometryAttribute = object.instanceMatrix;
          if (name === "instanceColor" && object.instanceColor) geometryAttribute = object.instanceColor;
        }
        if (cachedAttribute === void 0) return true;
        if (cachedAttribute.attribute !== geometryAttribute) return true;
        if (geometryAttribute && cachedAttribute.data !== geometryAttribute.data) return true;
        attributesNum++;
      }
    }
    if (currentState.attributesNum !== attributesNum) return true;
    if (currentState.index !== index) return true;
    return false;
  }
  __name(needsUpdate, "needsUpdate");
  function saveCache(object, geometry, program, index) {
    const cache = {};
    const attributes2 = geometry.attributes;
    let attributesNum = 0;
    const programAttributes = program.getAttributes();
    for (const name in programAttributes) {
      const programAttribute = programAttributes[name];
      if (programAttribute.location >= 0) {
        let attribute = attributes2[name];
        if (attribute === void 0) {
          if (name === "instanceMatrix" && object.instanceMatrix) attribute = object.instanceMatrix;
          if (name === "instanceColor" && object.instanceColor) attribute = object.instanceColor;
        }
        const data = {};
        data.attribute = attribute;
        if (attribute && attribute.data) {
          data.data = attribute.data;
        }
        cache[name] = data;
        attributesNum++;
      }
    }
    currentState.attributes = cache;
    currentState.attributesNum = attributesNum;
    currentState.index = index;
  }
  __name(saveCache, "saveCache");
  function initAttributes() {
    const newAttributes = currentState.newAttributes;
    for (let i = 0, il = newAttributes.length; i < il; i++) {
      newAttributes[i] = 0;
    }
  }
  __name(initAttributes, "initAttributes");
  function enableAttribute(attribute) {
    enableAttributeAndDivisor(attribute, 0);
  }
  __name(enableAttribute, "enableAttribute");
  function enableAttributeAndDivisor(attribute, meshPerAttribute) {
    const newAttributes = currentState.newAttributes;
    const enabledAttributes = currentState.enabledAttributes;
    const attributeDivisors = currentState.attributeDivisors;
    newAttributes[attribute] = 1;
    if (enabledAttributes[attribute] === 0) {
      gl.enableVertexAttribArray(attribute);
      enabledAttributes[attribute] = 1;
    }
    if (attributeDivisors[attribute] !== meshPerAttribute) {
      gl.vertexAttribDivisor(attribute, meshPerAttribute);
      attributeDivisors[attribute] = meshPerAttribute;
    }
  }
  __name(enableAttributeAndDivisor, "enableAttributeAndDivisor");
  function disableUnusedAttributes() {
    const newAttributes = currentState.newAttributes;
    const enabledAttributes = currentState.enabledAttributes;
    for (let i = 0, il = enabledAttributes.length; i < il; i++) {
      if (enabledAttributes[i] !== newAttributes[i]) {
        gl.disableVertexAttribArray(i);
        enabledAttributes[i] = 0;
      }
    }
  }
  __name(disableUnusedAttributes, "disableUnusedAttributes");
  function vertexAttribPointer(index, size, type, normalized, stride, offset, integer) {
    if (integer === true) {
      gl.vertexAttribIPointer(index, size, type, stride, offset);
    } else {
      gl.vertexAttribPointer(index, size, type, normalized, stride, offset);
    }
  }
  __name(vertexAttribPointer, "vertexAttribPointer");
  function setupVertexAttributes(object, material, program, geometry) {
    initAttributes();
    const geometryAttributes = geometry.attributes;
    const programAttributes = program.getAttributes();
    const materialDefaultAttributeValues = material.defaultAttributeValues;
    for (const name in programAttributes) {
      const programAttribute = programAttributes[name];
      if (programAttribute.location >= 0) {
        let geometryAttribute = geometryAttributes[name];
        if (geometryAttribute === void 0) {
          if (name === "instanceMatrix" && object.instanceMatrix) geometryAttribute = object.instanceMatrix;
          if (name === "instanceColor" && object.instanceColor) geometryAttribute = object.instanceColor;
        }
        if (geometryAttribute !== void 0) {
          const normalized = geometryAttribute.normalized;
          const size = geometryAttribute.itemSize;
          const attribute = attributes.get(geometryAttribute);
          if (attribute === void 0) continue;
          const buffer = attribute.buffer;
          const type = attribute.type;
          const bytesPerElement = attribute.bytesPerElement;
          const integer = type === gl.INT || type === gl.UNSIGNED_INT || geometryAttribute.gpuType === IntType;
          if (geometryAttribute.isInterleavedBufferAttribute) {
            const data = geometryAttribute.data;
            const stride = data.stride;
            const offset = geometryAttribute.offset;
            if (data.isInstancedInterleavedBuffer) {
              for (let i = 0; i < programAttribute.locationSize; i++) {
                enableAttributeAndDivisor(programAttribute.location + i, data.meshPerAttribute);
              }
              if (object.isInstancedMesh !== true && geometry._maxInstanceCount === void 0) {
                geometry._maxInstanceCount = data.meshPerAttribute * data.count;
              }
            } else {
              for (let i = 0; i < programAttribute.locationSize; i++) {
                enableAttribute(programAttribute.location + i);
              }
            }
            gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
            for (let i = 0; i < programAttribute.locationSize; i++) {
              vertexAttribPointer(
                programAttribute.location + i,
                size / programAttribute.locationSize,
                type,
                normalized,
                stride * bytesPerElement,
                (offset + size / programAttribute.locationSize * i) * bytesPerElement,
                integer
              );
            }
          } else {
            if (geometryAttribute.isInstancedBufferAttribute) {
              for (let i = 0; i < programAttribute.locationSize; i++) {
                enableAttributeAndDivisor(programAttribute.location + i, geometryAttribute.meshPerAttribute);
              }
              if (object.isInstancedMesh !== true && geometry._maxInstanceCount === void 0) {
                geometry._maxInstanceCount = geometryAttribute.meshPerAttribute * geometryAttribute.count;
              }
            } else {
              for (let i = 0; i < programAttribute.locationSize; i++) {
                enableAttribute(programAttribute.location + i);
              }
            }
            gl.bindBuffer(gl.ARRAY_BUFFER, buffer);
            for (let i = 0; i < programAttribute.locationSize; i++) {
              vertexAttribPointer(
                programAttribute.location + i,
                size / programAttribute.locationSize,
                type,
                normalized,
                size * bytesPerElement,
                size / programAttribute.locationSize * i * bytesPerElement,
                integer
              );
            }
          }
        } else if (materialDefaultAttributeValues !== void 0) {
          const value = materialDefaultAttributeValues[name];
          if (value !== void 0) {
            switch (value.length) {
              case 2:
                gl.vertexAttrib2fv(programAttribute.location, value);
                break;
              case 3:
                gl.vertexAttrib3fv(programAttribute.location, value);
                break;
              case 4:
                gl.vertexAttrib4fv(programAttribute.location, value);
                break;
              default:
                gl.vertexAttrib1fv(programAttribute.location, value);
            }
          }
        }
      }
    }
    disableUnusedAttributes();
  }
  __name(setupVertexAttributes, "setupVertexAttributes");
  function dispose() {
    reset();
    for (const geometryId in bindingStates) {
      const programMap = bindingStates[geometryId];
      for (const programId in programMap) {
        const stateMap = programMap[programId];
        for (const wireframe in stateMap) {
          deleteVertexArrayObject(stateMap[wireframe].object);
          delete stateMap[wireframe];
        }
        delete programMap[programId];
      }
      delete bindingStates[geometryId];
    }
  }
  __name(dispose, "dispose");
  function releaseStatesOfGeometry(geometry) {
    if (bindingStates[geometry.id] === void 0) return;
    const programMap = bindingStates[geometry.id];
    for (const programId in programMap) {
      const stateMap = programMap[programId];
      for (const wireframe in stateMap) {
        deleteVertexArrayObject(stateMap[wireframe].object);
        delete stateMap[wireframe];
      }
      delete programMap[programId];
    }
    delete bindingStates[geometry.id];
  }
  __name(releaseStatesOfGeometry, "releaseStatesOfGeometry");
  function releaseStatesOfProgram(program) {
    for (const geometryId in bindingStates) {
      const programMap = bindingStates[geometryId];
      if (programMap[program.id] === void 0) continue;
      const stateMap = programMap[program.id];
      for (const wireframe in stateMap) {
        deleteVertexArrayObject(stateMap[wireframe].object);
        delete stateMap[wireframe];
      }
      delete programMap[program.id];
    }
  }
  __name(releaseStatesOfProgram, "releaseStatesOfProgram");
  function reset() {
    resetDefaultState();
    forceUpdate = true;
    if (currentState === defaultState) return;
    currentState = defaultState;
    bindVertexArrayObject(currentState.object);
  }
  __name(reset, "reset");
  function resetDefaultState() {
    defaultState.geometry = null;
    defaultState.program = null;
    defaultState.wireframe = false;
  }
  __name(resetDefaultState, "resetDefaultState");
  return {
    setup,
    reset,
    resetDefaultState,
    dispose,
    releaseStatesOfGeometry,
    releaseStatesOfProgram,
    initAttributes,
    enableAttribute,
    disableUnusedAttributes
  };
}
__name(WebGLBindingStates, "WebGLBindingStates");
function WebGLBufferRenderer(gl, extensions, info) {
  let mode;
  function setMode(value) {
    mode = value;
  }
  __name(setMode, "setMode");
  function render(start, count) {
    gl.drawArrays(mode, start, count);
    info.update(count, mode, 1);
  }
  __name(render, "render");
  function renderInstances(start, count, primcount) {
    if (primcount === 0) return;
    gl.drawArraysInstanced(mode, start, count, primcount);
    info.update(count, mode, primcount);
  }
  __name(renderInstances, "renderInstances");
  function renderMultiDraw(starts, counts, drawCount) {
    if (drawCount === 0) return;
    const extension = extensions.get("WEBGL_multi_draw");
    extension.multiDrawArraysWEBGL(mode, starts, 0, counts, 0, drawCount);
    let elementCount = 0;
    for (let i = 0; i < drawCount; i++) {
      elementCount += counts[i];
    }
    info.update(elementCount, mode, 1);
  }
  __name(renderMultiDraw, "renderMultiDraw");
  function renderMultiDrawInstances(starts, counts, drawCount, primcount) {
    if (drawCount === 0) return;
    const extension = extensions.get("WEBGL_multi_draw");
    if (extension === null) {
      for (let i = 0; i < starts.length; i++) {
        renderInstances(starts[i], counts[i], primcount[i]);
      }
    } else {
      extension.multiDrawArraysInstancedWEBGL(mode, starts, 0, counts, 0, primcount, 0, drawCount);
      let elementCount = 0;
      for (let i = 0; i < drawCount; i++) {
        elementCount += counts[i] * primcount[i];
      }
      info.update(elementCount, mode, 1);
    }
  }
  __name(renderMultiDrawInstances, "renderMultiDrawInstances");
  this.setMode = setMode;
  this.render = render;
  this.renderInstances = renderInstances;
  this.renderMultiDraw = renderMultiDraw;
  this.renderMultiDrawInstances = renderMultiDrawInstances;
}
__name(WebGLBufferRenderer, "WebGLBufferRenderer");
function WebGLCapabilities(gl, extensions, parameters, utils) {
  let maxAnisotropy;
  function getMaxAnisotropy() {
    if (maxAnisotropy !== void 0) return maxAnisotropy;
    if (extensions.has("EXT_texture_filter_anisotropic") === true) {
      const extension = extensions.get("EXT_texture_filter_anisotropic");
      maxAnisotropy = gl.getParameter(extension.MAX_TEXTURE_MAX_ANISOTROPY_EXT);
    } else {
      maxAnisotropy = 0;
    }
    return maxAnisotropy;
  }
  __name(getMaxAnisotropy, "getMaxAnisotropy");
  function textureFormatReadable(textureFormat) {
    if (textureFormat !== RGBAFormat && utils.convert(textureFormat) !== gl.getParameter(gl.IMPLEMENTATION_COLOR_READ_FORMAT)) {
      return false;
    }
    return true;
  }
  __name(textureFormatReadable, "textureFormatReadable");
  function textureTypeReadable(textureType) {
    const halfFloatSupportedByExt = textureType === HalfFloatType && (extensions.has("EXT_color_buffer_half_float") || extensions.has("EXT_color_buffer_float"));
    if (textureType !== UnsignedByteType && utils.convert(textureType) !== gl.getParameter(gl.IMPLEMENTATION_COLOR_READ_TYPE) && // Edge and Chrome Mac < 52 (#9513)
    textureType !== FloatType && !halfFloatSupportedByExt) {
      return false;
    }
    return true;
  }
  __name(textureTypeReadable, "textureTypeReadable");
  function getMaxPrecision(precision2) {
    if (precision2 === "highp") {
      if (gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.HIGH_FLOAT).precision > 0 && gl.getShaderPrecisionFormat(gl.FRAGMENT_SHADER, gl.HIGH_FLOAT).precision > 0) {
        return "highp";
      }
      precision2 = "mediump";
    }
    if (precision2 === "mediump") {
      if (gl.getShaderPrecisionFormat(gl.VERTEX_SHADER, gl.MEDIUM_FLOAT).precision > 0 && gl.getShaderPrecisionFormat(gl.FRAGMENT_SHADER, gl.MEDIUM_FLOAT).precision > 0) {
        return "mediump";
      }
    }
    return "lowp";
  }
  __name(getMaxPrecision, "getMaxPrecision");
  let precision = parameters.precision !== void 0 ? parameters.precision : "highp";
  const maxPrecision = getMaxPrecision(precision);
  if (maxPrecision !== precision) {
    console.warn("THREE.WebGLRenderer:", precision, "not supported, using", maxPrecision, "instead.");
    precision = maxPrecision;
  }
  const logarithmicDepthBuffer = parameters.logarithmicDepthBuffer === true;
  const reverseDepthBuffer = parameters.reverseDepthBuffer === true && extensions.has("EXT_clip_control");
  const maxTextures = gl.getParameter(gl.MAX_TEXTURE_IMAGE_UNITS);
  const maxVertexTextures = gl.getParameter(gl.MAX_VERTEX_TEXTURE_IMAGE_UNITS);
  const maxTextureSize = gl.getParameter(gl.MAX_TEXTURE_SIZE);
  const maxCubemapSize = gl.getParameter(gl.MAX_CUBE_MAP_TEXTURE_SIZE);
  const maxAttributes = gl.getParameter(gl.MAX_VERTEX_ATTRIBS);
  const maxVertexUniforms = gl.getParameter(gl.MAX_VERTEX_UNIFORM_VECTORS);
  const maxVaryings = gl.getParameter(gl.MAX_VARYING_VECTORS);
  const maxFragmentUniforms = gl.getParameter(gl.MAX_FRAGMENT_UNIFORM_VECTORS);
  const vertexTextures = maxVertexTextures > 0;
  const maxSamples = gl.getParameter(gl.MAX_SAMPLES);
  return {
    isWebGL2: true,
    // keeping this for backwards compatibility
    getMaxAnisotropy,
    getMaxPrecision,
    textureFormatReadable,
    textureTypeReadable,
    precision,
    logarithmicDepthBuffer,
    reverseDepthBuffer,
    maxTextures,
    maxVertexTextures,
    maxTextureSize,
    maxCubemapSize,
    maxAttributes,
    maxVertexUniforms,
    maxVaryings,
    maxFragmentUniforms,
    vertexTextures,
    maxSamples
  };
}
__name(WebGLCapabilities, "WebGLCapabilities");
function WebGLClipping(properties) {
  const scope = this;
  let globalState = null, numGlobalPlanes = 0, localClippingEnabled = false, renderingShadows = false;
  const plane = new Plane(), viewNormalMatrix = new Matrix3(), uniform = { value: null, needsUpdate: false };
  this.uniform = uniform;
  this.numPlanes = 0;
  this.numIntersection = 0;
  this.init = function(planes, enableLocalClipping) {
    const enabled = planes.length !== 0 || enableLocalClipping || // enable state of previous frame - the clipping code has to
    // run another frame in order to reset the state:
    numGlobalPlanes !== 0 || localClippingEnabled;
    localClippingEnabled = enableLocalClipping;
    numGlobalPlanes = planes.length;
    return enabled;
  };
  this.beginShadows = function() {
    renderingShadows = true;
    projectPlanes(null);
  };
  this.endShadows = function() {
    renderingShadows = false;
  };
  this.setGlobalState = function(planes, camera) {
    globalState = projectPlanes(planes, camera, 0);
  };
  this.setState = function(material, camera, useCache) {
    const planes = material.clippingPlanes, clipIntersection = material.clipIntersection, clipShadows = material.clipShadows;
    const materialProperties = properties.get(material);
    if (!localClippingEnabled || planes === null || planes.length === 0 || renderingShadows && !clipShadows) {
      if (renderingShadows) {
        projectPlanes(null);
      } else {
        resetGlobalState();
      }
    } else {
      const nGlobal = renderingShadows ? 0 : numGlobalPlanes, lGlobal = nGlobal * 4;
      let dstArray = materialProperties.clippingState || null;
      uniform.value = dstArray;
      dstArray = projectPlanes(planes, camera, lGlobal, useCache);
      for (let i = 0; i !== lGlobal; ++i) {
        dstArray[i] = globalState[i];
      }
      materialProperties.clippingState = dstArray;
      this.numIntersection = clipIntersection ? this.numPlanes : 0;
      this.numPlanes += nGlobal;
    }
  };
  function resetGlobalState() {
    if (uniform.value !== globalState) {
      uniform.value = globalState;
      uniform.needsUpdate = numGlobalPlanes > 0;
    }
    scope.numPlanes = numGlobalPlanes;
    scope.numIntersection = 0;
  }
  __name(resetGlobalState, "resetGlobalState");
  function projectPlanes(planes, camera, dstOffset, skipTransform) {
    const nPlanes = planes !== null ? planes.length : 0;
    let dstArray = null;
    if (nPlanes !== 0) {
      dstArray = uniform.value;
      if (skipTransform !== true || dstArray === null) {
        const flatSize = dstOffset + nPlanes * 4, viewMatrix = camera.matrixWorldInverse;
        viewNormalMatrix.getNormalMatrix(viewMatrix);
        if (dstArray === null || dstArray.length < flatSize) {
          dstArray = new Float32Array(flatSize);
        }
        for (let i = 0, i4 = dstOffset; i !== nPlanes; ++i, i4 += 4) {
          plane.copy(planes[i]).applyMatrix4(viewMatrix, viewNormalMatrix);
          plane.normal.toArray(dstArray, i4);
          dstArray[i4 + 3] = plane.constant;
        }
      }
      uniform.value = dstArray;
      uniform.needsUpdate = true;
    }
    scope.numPlanes = nPlanes;
    scope.numIntersection = 0;
    return dstArray;
  }
  __name(projectPlanes, "projectPlanes");
}
__name(WebGLClipping, "WebGLClipping");
function WebGLCubeMaps(renderer) {
  let cubemaps = /* @__PURE__ */ new WeakMap();
  function mapTextureMapping(texture, mapping) {
    if (mapping === EquirectangularReflectionMapping) {
      texture.mapping = CubeReflectionMapping;
    } else if (mapping === EquirectangularRefractionMapping) {
      texture.mapping = CubeRefractionMapping;
    }
    return texture;
  }
  __name(mapTextureMapping, "mapTextureMapping");
  function get(texture) {
    if (texture && texture.isTexture) {
      const mapping = texture.mapping;
      if (mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping) {
        if (cubemaps.has(texture)) {
          const cubemap = cubemaps.get(texture).texture;
          return mapTextureMapping(cubemap, texture.mapping);
        } else {
          const image = texture.image;
          if (image && image.height > 0) {
            const renderTarget = new WebGLCubeRenderTarget(image.height);
            renderTarget.fromEquirectangularTexture(renderer, texture);
            cubemaps.set(texture, renderTarget);
            texture.addEventListener("dispose", onTextureDispose);
            return mapTextureMapping(renderTarget.texture, texture.mapping);
          } else {
            return null;
          }
        }
      }
    }
    return texture;
  }
  __name(get, "get");
  function onTextureDispose(event) {
    const texture = event.target;
    texture.removeEventListener("dispose", onTextureDispose);
    const cubemap = cubemaps.get(texture);
    if (cubemap !== void 0) {
      cubemaps.delete(texture);
      cubemap.dispose();
    }
  }
  __name(onTextureDispose, "onTextureDispose");
  function dispose() {
    cubemaps = /* @__PURE__ */ new WeakMap();
  }
  __name(dispose, "dispose");
  return {
    get,
    dispose
  };
}
__name(WebGLCubeMaps, "WebGLCubeMaps");
class OrthographicCamera extends Camera {
  static {
    __name(this, "OrthographicCamera");
  }
  constructor(left = -1, right = 1, top = 1, bottom = -1, near = 0.1, far = 2e3) {
    super();
    this.isOrthographicCamera = true;
    this.type = "OrthographicCamera";
    this.zoom = 1;
    this.view = null;
    this.left = left;
    this.right = right;
    this.top = top;
    this.bottom = bottom;
    this.near = near;
    this.far = far;
    this.updateProjectionMatrix();
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.left = source.left;
    this.right = source.right;
    this.top = source.top;
    this.bottom = source.bottom;
    this.near = source.near;
    this.far = source.far;
    this.zoom = source.zoom;
    this.view = source.view === null ? null : Object.assign({}, source.view);
    return this;
  }
  setViewOffset(fullWidth, fullHeight, x, y, width, height) {
    if (this.view === null) {
      this.view = {
        enabled: true,
        fullWidth: 1,
        fullHeight: 1,
        offsetX: 0,
        offsetY: 0,
        width: 1,
        height: 1
      };
    }
    this.view.enabled = true;
    this.view.fullWidth = fullWidth;
    this.view.fullHeight = fullHeight;
    this.view.offsetX = x;
    this.view.offsetY = y;
    this.view.width = width;
    this.view.height = height;
    this.updateProjectionMatrix();
  }
  clearViewOffset() {
    if (this.view !== null) {
      this.view.enabled = false;
    }
    this.updateProjectionMatrix();
  }
  updateProjectionMatrix() {
    const dx = (this.right - this.left) / (2 * this.zoom);
    const dy = (this.top - this.bottom) / (2 * this.zoom);
    const cx = (this.right + this.left) / 2;
    const cy = (this.top + this.bottom) / 2;
    let left = cx - dx;
    let right = cx + dx;
    let top = cy + dy;
    let bottom = cy - dy;
    if (this.view !== null && this.view.enabled) {
      const scaleW = (this.right - this.left) / this.view.fullWidth / this.zoom;
      const scaleH = (this.top - this.bottom) / this.view.fullHeight / this.zoom;
      left += scaleW * this.view.offsetX;
      right = left + scaleW * this.view.width;
      top -= scaleH * this.view.offsetY;
      bottom = top - scaleH * this.view.height;
    }
    this.projectionMatrix.makeOrthographic(left, right, top, bottom, this.near, this.far, this.coordinateSystem);
    this.projectionMatrixInverse.copy(this.projectionMatrix).invert();
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    data.object.zoom = this.zoom;
    data.object.left = this.left;
    data.object.right = this.right;
    data.object.top = this.top;
    data.object.bottom = this.bottom;
    data.object.near = this.near;
    data.object.far = this.far;
    if (this.view !== null) data.object.view = Object.assign({}, this.view);
    return data;
  }
}
const LOD_MIN = 4;
const EXTRA_LOD_SIGMA = [0.125, 0.215, 0.35, 0.446, 0.526, 0.582];
const MAX_SAMPLES = 20;
const _flatCamera = /* @__PURE__ */ new OrthographicCamera();
const _clearColor = /* @__PURE__ */ new Color();
let _oldTarget = null;
let _oldActiveCubeFace = 0;
let _oldActiveMipmapLevel = 0;
let _oldXrEnabled = false;
const PHI = (1 + Math.sqrt(5)) / 2;
const INV_PHI = 1 / PHI;
const _axisDirections = [
  /* @__PURE__ */ new Vector3(-PHI, INV_PHI, 0),
  /* @__PURE__ */ new Vector3(PHI, INV_PHI, 0),
  /* @__PURE__ */ new Vector3(-INV_PHI, 0, PHI),
  /* @__PURE__ */ new Vector3(INV_PHI, 0, PHI),
  /* @__PURE__ */ new Vector3(0, PHI, -INV_PHI),
  /* @__PURE__ */ new Vector3(0, PHI, INV_PHI),
  /* @__PURE__ */ new Vector3(-1, 1, -1),
  /* @__PURE__ */ new Vector3(1, 1, -1),
  /* @__PURE__ */ new Vector3(-1, 1, 1),
  /* @__PURE__ */ new Vector3(1, 1, 1)
];
class PMREMGenerator {
  static {
    __name(this, "PMREMGenerator");
  }
  constructor(renderer) {
    this._renderer = renderer;
    this._pingPongRenderTarget = null;
    this._lodMax = 0;
    this._cubeSize = 0;
    this._lodPlanes = [];
    this._sizeLods = [];
    this._sigmas = [];
    this._blurMaterial = null;
    this._cubemapMaterial = null;
    this._equirectMaterial = null;
    this._compileMaterial(this._blurMaterial);
  }
  /**
   * Generates a PMREM from a supplied Scene, which can be faster than using an
   * image if networking bandwidth is low. Optional sigma specifies a blur radius
   * in radians to be applied to the scene before PMREM generation. Optional near
   * and far planes ensure the scene is rendered in its entirety (the cubeCamera
   * is placed at the origin).
   */
  fromScene(scene, sigma = 0, near = 0.1, far = 100) {
    _oldTarget = this._renderer.getRenderTarget();
    _oldActiveCubeFace = this._renderer.getActiveCubeFace();
    _oldActiveMipmapLevel = this._renderer.getActiveMipmapLevel();
    _oldXrEnabled = this._renderer.xr.enabled;
    this._renderer.xr.enabled = false;
    this._setSize(256);
    const cubeUVRenderTarget = this._allocateTargets();
    cubeUVRenderTarget.depthBuffer = true;
    this._sceneToCubeUV(scene, near, far, cubeUVRenderTarget);
    if (sigma > 0) {
      this._blur(cubeUVRenderTarget, 0, 0, sigma);
    }
    this._applyPMREM(cubeUVRenderTarget);
    this._cleanup(cubeUVRenderTarget);
    return cubeUVRenderTarget;
  }
  /**
   * Generates a PMREM from an equirectangular texture, which can be either LDR
   * or HDR. The ideal input image size is 1k (1024 x 512),
   * as this matches best with the 256 x 256 cubemap output.
   * The smallest supported equirectangular image size is 64 x 32.
   */
  fromEquirectangular(equirectangular, renderTarget = null) {
    return this._fromTexture(equirectangular, renderTarget);
  }
  /**
   * Generates a PMREM from an cubemap texture, which can be either LDR
   * or HDR. The ideal input cube size is 256 x 256,
   * as this matches best with the 256 x 256 cubemap output.
   * The smallest supported cube size is 16 x 16.
   */
  fromCubemap(cubemap, renderTarget = null) {
    return this._fromTexture(cubemap, renderTarget);
  }
  /**
   * Pre-compiles the cubemap shader. You can get faster start-up by invoking this method during
   * your texture's network fetch for increased concurrency.
   */
  compileCubemapShader() {
    if (this._cubemapMaterial === null) {
      this._cubemapMaterial = _getCubemapMaterial();
      this._compileMaterial(this._cubemapMaterial);
    }
  }
  /**
   * Pre-compiles the equirectangular shader. You can get faster start-up by invoking this method during
   * your texture's network fetch for increased concurrency.
   */
  compileEquirectangularShader() {
    if (this._equirectMaterial === null) {
      this._equirectMaterial = _getEquirectMaterial();
      this._compileMaterial(this._equirectMaterial);
    }
  }
  /**
   * Disposes of the PMREMGenerator's internal memory. Note that PMREMGenerator is a static class,
   * so you should not need more than one PMREMGenerator object. If you do, calling dispose() on
   * one of them will cause any others to also become unusable.
   */
  dispose() {
    this._dispose();
    if (this._cubemapMaterial !== null) this._cubemapMaterial.dispose();
    if (this._equirectMaterial !== null) this._equirectMaterial.dispose();
  }
  // private interface
  _setSize(cubeSize) {
    this._lodMax = Math.floor(Math.log2(cubeSize));
    this._cubeSize = Math.pow(2, this._lodMax);
  }
  _dispose() {
    if (this._blurMaterial !== null) this._blurMaterial.dispose();
    if (this._pingPongRenderTarget !== null) this._pingPongRenderTarget.dispose();
    for (let i = 0; i < this._lodPlanes.length; i++) {
      this._lodPlanes[i].dispose();
    }
  }
  _cleanup(outputTarget) {
    this._renderer.setRenderTarget(_oldTarget, _oldActiveCubeFace, _oldActiveMipmapLevel);
    this._renderer.xr.enabled = _oldXrEnabled;
    outputTarget.scissorTest = false;
    _setViewport(outputTarget, 0, 0, outputTarget.width, outputTarget.height);
  }
  _fromTexture(texture, renderTarget) {
    if (texture.mapping === CubeReflectionMapping || texture.mapping === CubeRefractionMapping) {
      this._setSize(texture.image.length === 0 ? 16 : texture.image[0].width || texture.image[0].image.width);
    } else {
      this._setSize(texture.image.width / 4);
    }
    _oldTarget = this._renderer.getRenderTarget();
    _oldActiveCubeFace = this._renderer.getActiveCubeFace();
    _oldActiveMipmapLevel = this._renderer.getActiveMipmapLevel();
    _oldXrEnabled = this._renderer.xr.enabled;
    this._renderer.xr.enabled = false;
    const cubeUVRenderTarget = renderTarget || this._allocateTargets();
    this._textureToCubeUV(texture, cubeUVRenderTarget);
    this._applyPMREM(cubeUVRenderTarget);
    this._cleanup(cubeUVRenderTarget);
    return cubeUVRenderTarget;
  }
  _allocateTargets() {
    const width = 3 * Math.max(this._cubeSize, 16 * 7);
    const height = 4 * this._cubeSize;
    const params = {
      magFilter: LinearFilter,
      minFilter: LinearFilter,
      generateMipmaps: false,
      type: HalfFloatType,
      format: RGBAFormat,
      colorSpace: LinearSRGBColorSpace,
      depthBuffer: false
    };
    const cubeUVRenderTarget = _createRenderTarget(width, height, params);
    if (this._pingPongRenderTarget === null || this._pingPongRenderTarget.width !== width || this._pingPongRenderTarget.height !== height) {
      if (this._pingPongRenderTarget !== null) {
        this._dispose();
      }
      this._pingPongRenderTarget = _createRenderTarget(width, height, params);
      const { _lodMax } = this;
      ({ sizeLods: this._sizeLods, lodPlanes: this._lodPlanes, sigmas: this._sigmas } = _createPlanes(_lodMax));
      this._blurMaterial = _getBlurShader(_lodMax, width, height);
    }
    return cubeUVRenderTarget;
  }
  _compileMaterial(material) {
    const tmpMesh = new Mesh(this._lodPlanes[0], material);
    this._renderer.compile(tmpMesh, _flatCamera);
  }
  _sceneToCubeUV(scene, near, far, cubeUVRenderTarget) {
    const fov2 = 90;
    const aspect2 = 1;
    const cubeCamera = new PerspectiveCamera(fov2, aspect2, near, far);
    const upSign = [1, -1, 1, 1, 1, 1];
    const forwardSign = [1, 1, 1, -1, -1, -1];
    const renderer = this._renderer;
    const originalAutoClear = renderer.autoClear;
    const toneMapping = renderer.toneMapping;
    renderer.getClearColor(_clearColor);
    renderer.toneMapping = NoToneMapping;
    renderer.autoClear = false;
    const backgroundMaterial = new MeshBasicMaterial({
      name: "PMREM.Background",
      side: BackSide,
      depthWrite: false,
      depthTest: false
    });
    const backgroundBox = new Mesh(new BoxGeometry(), backgroundMaterial);
    let useSolidColor = false;
    const background = scene.background;
    if (background) {
      if (background.isColor) {
        backgroundMaterial.color.copy(background);
        scene.background = null;
        useSolidColor = true;
      }
    } else {
      backgroundMaterial.color.copy(_clearColor);
      useSolidColor = true;
    }
    for (let i = 0; i < 6; i++) {
      const col = i % 3;
      if (col === 0) {
        cubeCamera.up.set(0, upSign[i], 0);
        cubeCamera.lookAt(forwardSign[i], 0, 0);
      } else if (col === 1) {
        cubeCamera.up.set(0, 0, upSign[i]);
        cubeCamera.lookAt(0, forwardSign[i], 0);
      } else {
        cubeCamera.up.set(0, upSign[i], 0);
        cubeCamera.lookAt(0, 0, forwardSign[i]);
      }
      const size = this._cubeSize;
      _setViewport(cubeUVRenderTarget, col * size, i > 2 ? size : 0, size, size);
      renderer.setRenderTarget(cubeUVRenderTarget);
      if (useSolidColor) {
        renderer.render(backgroundBox, cubeCamera);
      }
      renderer.render(scene, cubeCamera);
    }
    backgroundBox.geometry.dispose();
    backgroundBox.material.dispose();
    renderer.toneMapping = toneMapping;
    renderer.autoClear = originalAutoClear;
    scene.background = background;
  }
  _textureToCubeUV(texture, cubeUVRenderTarget) {
    const renderer = this._renderer;
    const isCubeTexture = texture.mapping === CubeReflectionMapping || texture.mapping === CubeRefractionMapping;
    if (isCubeTexture) {
      if (this._cubemapMaterial === null) {
        this._cubemapMaterial = _getCubemapMaterial();
      }
      this._cubemapMaterial.uniforms.flipEnvMap.value = texture.isRenderTargetTexture === false ? -1 : 1;
    } else {
      if (this._equirectMaterial === null) {
        this._equirectMaterial = _getEquirectMaterial();
      }
    }
    const material = isCubeTexture ? this._cubemapMaterial : this._equirectMaterial;
    const mesh = new Mesh(this._lodPlanes[0], material);
    const uniforms = material.uniforms;
    uniforms["envMap"].value = texture;
    const size = this._cubeSize;
    _setViewport(cubeUVRenderTarget, 0, 0, 3 * size, 2 * size);
    renderer.setRenderTarget(cubeUVRenderTarget);
    renderer.render(mesh, _flatCamera);
  }
  _applyPMREM(cubeUVRenderTarget) {
    const renderer = this._renderer;
    const autoClear = renderer.autoClear;
    renderer.autoClear = false;
    const n = this._lodPlanes.length;
    for (let i = 1; i < n; i++) {
      const sigma = Math.sqrt(this._sigmas[i] * this._sigmas[i] - this._sigmas[i - 1] * this._sigmas[i - 1]);
      const poleAxis = _axisDirections[(n - i - 1) % _axisDirections.length];
      this._blur(cubeUVRenderTarget, i - 1, i, sigma, poleAxis);
    }
    renderer.autoClear = autoClear;
  }
  /**
   * This is a two-pass Gaussian blur for a cubemap. Normally this is done
   * vertically and horizontally, but this breaks down on a cube. Here we apply
   * the blur latitudinally (around the poles), and then longitudinally (towards
   * the poles) to approximate the orthogonally-separable blur. It is least
   * accurate at the poles, but still does a decent job.
   */
  _blur(cubeUVRenderTarget, lodIn, lodOut, sigma, poleAxis) {
    const pingPongRenderTarget = this._pingPongRenderTarget;
    this._halfBlur(
      cubeUVRenderTarget,
      pingPongRenderTarget,
      lodIn,
      lodOut,
      sigma,
      "latitudinal",
      poleAxis
    );
    this._halfBlur(
      pingPongRenderTarget,
      cubeUVRenderTarget,
      lodOut,
      lodOut,
      sigma,
      "longitudinal",
      poleAxis
    );
  }
  _halfBlur(targetIn, targetOut, lodIn, lodOut, sigmaRadians, direction, poleAxis) {
    const renderer = this._renderer;
    const blurMaterial = this._blurMaterial;
    if (direction !== "latitudinal" && direction !== "longitudinal") {
      console.error(
        "blur direction must be either latitudinal or longitudinal!"
      );
    }
    const STANDARD_DEVIATIONS = 3;
    const blurMesh = new Mesh(this._lodPlanes[lodOut], blurMaterial);
    const blurUniforms = blurMaterial.uniforms;
    const pixels = this._sizeLods[lodIn] - 1;
    const radiansPerPixel = isFinite(sigmaRadians) ? Math.PI / (2 * pixels) : 2 * Math.PI / (2 * MAX_SAMPLES - 1);
    const sigmaPixels = sigmaRadians / radiansPerPixel;
    const samples = isFinite(sigmaRadians) ? 1 + Math.floor(STANDARD_DEVIATIONS * sigmaPixels) : MAX_SAMPLES;
    if (samples > MAX_SAMPLES) {
      console.warn(`sigmaRadians, ${sigmaRadians}, is too large and will clip, as it requested ${samples} samples when the maximum is set to ${MAX_SAMPLES}`);
    }
    const weights = [];
    let sum = 0;
    for (let i = 0; i < MAX_SAMPLES; ++i) {
      const x2 = i / sigmaPixels;
      const weight = Math.exp(-x2 * x2 / 2);
      weights.push(weight);
      if (i === 0) {
        sum += weight;
      } else if (i < samples) {
        sum += 2 * weight;
      }
    }
    for (let i = 0; i < weights.length; i++) {
      weights[i] = weights[i] / sum;
    }
    blurUniforms["envMap"].value = targetIn.texture;
    blurUniforms["samples"].value = samples;
    blurUniforms["weights"].value = weights;
    blurUniforms["latitudinal"].value = direction === "latitudinal";
    if (poleAxis) {
      blurUniforms["poleAxis"].value = poleAxis;
    }
    const { _lodMax } = this;
    blurUniforms["dTheta"].value = radiansPerPixel;
    blurUniforms["mipInt"].value = _lodMax - lodIn;
    const outputSize = this._sizeLods[lodOut];
    const x = 3 * outputSize * (lodOut > _lodMax - LOD_MIN ? lodOut - _lodMax + LOD_MIN : 0);
    const y = 4 * (this._cubeSize - outputSize);
    _setViewport(targetOut, x, y, 3 * outputSize, 2 * outputSize);
    renderer.setRenderTarget(targetOut);
    renderer.render(blurMesh, _flatCamera);
  }
}
function _createPlanes(lodMax) {
  const lodPlanes = [];
  const sizeLods = [];
  const sigmas = [];
  let lod = lodMax;
  const totalLods = lodMax - LOD_MIN + 1 + EXTRA_LOD_SIGMA.length;
  for (let i = 0; i < totalLods; i++) {
    const sizeLod = Math.pow(2, lod);
    sizeLods.push(sizeLod);
    let sigma = 1 / sizeLod;
    if (i > lodMax - LOD_MIN) {
      sigma = EXTRA_LOD_SIGMA[i - lodMax + LOD_MIN - 1];
    } else if (i === 0) {
      sigma = 0;
    }
    sigmas.push(sigma);
    const texelSize = 1 / (sizeLod - 2);
    const min = -texelSize;
    const max2 = 1 + texelSize;
    const uv1 = [min, min, max2, min, max2, max2, min, min, max2, max2, min, max2];
    const cubeFaces = 6;
    const vertices = 6;
    const positionSize = 3;
    const uvSize = 2;
    const faceIndexSize = 1;
    const position = new Float32Array(positionSize * vertices * cubeFaces);
    const uv = new Float32Array(uvSize * vertices * cubeFaces);
    const faceIndex = new Float32Array(faceIndexSize * vertices * cubeFaces);
    for (let face = 0; face < cubeFaces; face++) {
      const x = face % 3 * 2 / 3 - 1;
      const y = face > 2 ? 0 : -1;
      const coordinates = [
        x,
        y,
        0,
        x + 2 / 3,
        y,
        0,
        x + 2 / 3,
        y + 1,
        0,
        x,
        y,
        0,
        x + 2 / 3,
        y + 1,
        0,
        x,
        y + 1,
        0
      ];
      position.set(coordinates, positionSize * vertices * face);
      uv.set(uv1, uvSize * vertices * face);
      const fill = [face, face, face, face, face, face];
      faceIndex.set(fill, faceIndexSize * vertices * face);
    }
    const planes = new BufferGeometry();
    planes.setAttribute("position", new BufferAttribute(position, positionSize));
    planes.setAttribute("uv", new BufferAttribute(uv, uvSize));
    planes.setAttribute("faceIndex", new BufferAttribute(faceIndex, faceIndexSize));
    lodPlanes.push(planes);
    if (lod > LOD_MIN) {
      lod--;
    }
  }
  return { lodPlanes, sizeLods, sigmas };
}
__name(_createPlanes, "_createPlanes");
function _createRenderTarget(width, height, params) {
  const cubeUVRenderTarget = new WebGLRenderTarget(width, height, params);
  cubeUVRenderTarget.texture.mapping = CubeUVReflectionMapping;
  cubeUVRenderTarget.texture.name = "PMREM.cubeUv";
  cubeUVRenderTarget.scissorTest = true;
  return cubeUVRenderTarget;
}
__name(_createRenderTarget, "_createRenderTarget");
function _setViewport(target, x, y, width, height) {
  target.viewport.set(x, y, width, height);
  target.scissor.set(x, y, width, height);
}
__name(_setViewport, "_setViewport");
function _getBlurShader(lodMax, width, height) {
  const weights = new Float32Array(MAX_SAMPLES);
  const poleAxis = new Vector3(0, 1, 0);
  const shaderMaterial = new ShaderMaterial({
    name: "SphericalGaussianBlur",
    defines: {
      "n": MAX_SAMPLES,
      "CUBEUV_TEXEL_WIDTH": 1 / width,
      "CUBEUV_TEXEL_HEIGHT": 1 / height,
      "CUBEUV_MAX_MIP": `${lodMax}.0`
    },
    uniforms: {
      "envMap": { value: null },
      "samples": { value: 1 },
      "weights": { value: weights },
      "latitudinal": { value: false },
      "dTheta": { value: 0 },
      "mipInt": { value: 0 },
      "poleAxis": { value: poleAxis }
    },
    vertexShader: _getCommonVertexShader(),
    fragmentShader: (
      /* glsl */
      `

			precision mediump float;
			precision mediump int;

			varying vec3 vOutputDirection;

			uniform sampler2D envMap;
			uniform int samples;
			uniform float weights[ n ];
			uniform bool latitudinal;
			uniform float dTheta;
			uniform float mipInt;
			uniform vec3 poleAxis;

			#define ENVMAP_TYPE_CUBE_UV
			#include <cube_uv_reflection_fragment>

			vec3 getSample( float theta, vec3 axis ) {

				float cosTheta = cos( theta );
				// Rodrigues' axis-angle rotation
				vec3 sampleDirection = vOutputDirection * cosTheta
					+ cross( axis, vOutputDirection ) * sin( theta )
					+ axis * dot( axis, vOutputDirection ) * ( 1.0 - cosTheta );

				return bilinearCubeUV( envMap, sampleDirection, mipInt );

			}

			void main() {

				vec3 axis = latitudinal ? poleAxis : cross( poleAxis, vOutputDirection );

				if ( all( equal( axis, vec3( 0.0 ) ) ) ) {

					axis = vec3( vOutputDirection.z, 0.0, - vOutputDirection.x );

				}

				axis = normalize( axis );

				gl_FragColor = vec4( 0.0, 0.0, 0.0, 1.0 );
				gl_FragColor.rgb += weights[ 0 ] * getSample( 0.0, axis );

				for ( int i = 1; i < n; i++ ) {

					if ( i >= samples ) {

						break;

					}

					float theta = dTheta * float( i );
					gl_FragColor.rgb += weights[ i ] * getSample( -1.0 * theta, axis );
					gl_FragColor.rgb += weights[ i ] * getSample( theta, axis );

				}

			}
		`
    ),
    blending: NoBlending,
    depthTest: false,
    depthWrite: false
  });
  return shaderMaterial;
}
__name(_getBlurShader, "_getBlurShader");
function _getEquirectMaterial() {
  return new ShaderMaterial({
    name: "EquirectangularToCubeUV",
    uniforms: {
      "envMap": { value: null }
    },
    vertexShader: _getCommonVertexShader(),
    fragmentShader: (
      /* glsl */
      `

			precision mediump float;
			precision mediump int;

			varying vec3 vOutputDirection;

			uniform sampler2D envMap;

			#include <common>

			void main() {

				vec3 outputDirection = normalize( vOutputDirection );
				vec2 uv = equirectUv( outputDirection );

				gl_FragColor = vec4( texture2D ( envMap, uv ).rgb, 1.0 );

			}
		`
    ),
    blending: NoBlending,
    depthTest: false,
    depthWrite: false
  });
}
__name(_getEquirectMaterial, "_getEquirectMaterial");
function _getCubemapMaterial() {
  return new ShaderMaterial({
    name: "CubemapToCubeUV",
    uniforms: {
      "envMap": { value: null },
      "flipEnvMap": { value: -1 }
    },
    vertexShader: _getCommonVertexShader(),
    fragmentShader: (
      /* glsl */
      `

			precision mediump float;
			precision mediump int;

			uniform float flipEnvMap;

			varying vec3 vOutputDirection;

			uniform samplerCube envMap;

			void main() {

				gl_FragColor = textureCube( envMap, vec3( flipEnvMap * vOutputDirection.x, vOutputDirection.yz ) );

			}
		`
    ),
    blending: NoBlending,
    depthTest: false,
    depthWrite: false
  });
}
__name(_getCubemapMaterial, "_getCubemapMaterial");
function _getCommonVertexShader() {
  return (
    /* glsl */
    `

		precision mediump float;
		precision mediump int;

		attribute float faceIndex;

		varying vec3 vOutputDirection;

		// RH coordinate system; PMREM face-indexing convention
		vec3 getDirection( vec2 uv, float face ) {

			uv = 2.0 * uv - 1.0;

			vec3 direction = vec3( uv, 1.0 );

			if ( face == 0.0 ) {

				direction = direction.zyx; // ( 1, v, u ) pos x

			} else if ( face == 1.0 ) {

				direction = direction.xzy;
				direction.xz *= -1.0; // ( -u, 1, -v ) pos y

			} else if ( face == 2.0 ) {

				direction.x *= -1.0; // ( -u, v, 1 ) pos z

			} else if ( face == 3.0 ) {

				direction = direction.zyx;
				direction.xz *= -1.0; // ( -1, v, -u ) neg x

			} else if ( face == 4.0 ) {

				direction = direction.xzy;
				direction.xy *= -1.0; // ( -u, -1, v ) neg y

			} else if ( face == 5.0 ) {

				direction.z *= -1.0; // ( u, v, -1 ) neg z

			}

			return direction;

		}

		void main() {

			vOutputDirection = getDirection( uv, faceIndex );
			gl_Position = vec4( position, 1.0 );

		}
	`
  );
}
__name(_getCommonVertexShader, "_getCommonVertexShader");
function WebGLCubeUVMaps(renderer) {
  let cubeUVmaps = /* @__PURE__ */ new WeakMap();
  let pmremGenerator = null;
  function get(texture) {
    if (texture && texture.isTexture) {
      const mapping = texture.mapping;
      const isEquirectMap = mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping;
      const isCubeMap = mapping === CubeReflectionMapping || mapping === CubeRefractionMapping;
      if (isEquirectMap || isCubeMap) {
        let renderTarget = cubeUVmaps.get(texture);
        const currentPMREMVersion = renderTarget !== void 0 ? renderTarget.texture.pmremVersion : 0;
        if (texture.isRenderTargetTexture && texture.pmremVersion !== currentPMREMVersion) {
          if (pmremGenerator === null) pmremGenerator = new PMREMGenerator(renderer);
          renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular(texture, renderTarget) : pmremGenerator.fromCubemap(texture, renderTarget);
          renderTarget.texture.pmremVersion = texture.pmremVersion;
          cubeUVmaps.set(texture, renderTarget);
          return renderTarget.texture;
        } else {
          if (renderTarget !== void 0) {
            return renderTarget.texture;
          } else {
            const image = texture.image;
            if (isEquirectMap && image && image.height > 0 || isCubeMap && image && isCubeTextureComplete(image)) {
              if (pmremGenerator === null) pmremGenerator = new PMREMGenerator(renderer);
              renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular(texture) : pmremGenerator.fromCubemap(texture);
              renderTarget.texture.pmremVersion = texture.pmremVersion;
              cubeUVmaps.set(texture, renderTarget);
              texture.addEventListener("dispose", onTextureDispose);
              return renderTarget.texture;
            } else {
              return null;
            }
          }
        }
      }
    }
    return texture;
  }
  __name(get, "get");
  function isCubeTextureComplete(image) {
    let count = 0;
    const length = 6;
    for (let i = 0; i < length; i++) {
      if (image[i] !== void 0) count++;
    }
    return count === length;
  }
  __name(isCubeTextureComplete, "isCubeTextureComplete");
  function onTextureDispose(event) {
    const texture = event.target;
    texture.removeEventListener("dispose", onTextureDispose);
    const cubemapUV = cubeUVmaps.get(texture);
    if (cubemapUV !== void 0) {
      cubeUVmaps.delete(texture);
      cubemapUV.dispose();
    }
  }
  __name(onTextureDispose, "onTextureDispose");
  function dispose() {
    cubeUVmaps = /* @__PURE__ */ new WeakMap();
    if (pmremGenerator !== null) {
      pmremGenerator.dispose();
      pmremGenerator = null;
    }
  }
  __name(dispose, "dispose");
  return {
    get,
    dispose
  };
}
__name(WebGLCubeUVMaps, "WebGLCubeUVMaps");
function WebGLExtensions(gl) {
  const extensions = {};
  function getExtension(name) {
    if (extensions[name] !== void 0) {
      return extensions[name];
    }
    let extension;
    switch (name) {
      case "WEBGL_depth_texture":
        extension = gl.getExtension("WEBGL_depth_texture") || gl.getExtension("MOZ_WEBGL_depth_texture") || gl.getExtension("WEBKIT_WEBGL_depth_texture");
        break;
      case "EXT_texture_filter_anisotropic":
        extension = gl.getExtension("EXT_texture_filter_anisotropic") || gl.getExtension("MOZ_EXT_texture_filter_anisotropic") || gl.getExtension("WEBKIT_EXT_texture_filter_anisotropic");
        break;
      case "WEBGL_compressed_texture_s3tc":
        extension = gl.getExtension("WEBGL_compressed_texture_s3tc") || gl.getExtension("MOZ_WEBGL_compressed_texture_s3tc") || gl.getExtension("WEBKIT_WEBGL_compressed_texture_s3tc");
        break;
      case "WEBGL_compressed_texture_pvrtc":
        extension = gl.getExtension("WEBGL_compressed_texture_pvrtc") || gl.getExtension("WEBKIT_WEBGL_compressed_texture_pvrtc");
        break;
      default:
        extension = gl.getExtension(name);
    }
    extensions[name] = extension;
    return extension;
  }
  __name(getExtension, "getExtension");
  return {
    has: /* @__PURE__ */ __name(function(name) {
      return getExtension(name) !== null;
    }, "has"),
    init: /* @__PURE__ */ __name(function() {
      getExtension("EXT_color_buffer_float");
      getExtension("WEBGL_clip_cull_distance");
      getExtension("OES_texture_float_linear");
      getExtension("EXT_color_buffer_half_float");
      getExtension("WEBGL_multisampled_render_to_texture");
      getExtension("WEBGL_render_shared_exponent");
    }, "init"),
    get: /* @__PURE__ */ __name(function(name) {
      const extension = getExtension(name);
      if (extension === null) {
        warnOnce("THREE.WebGLRenderer: " + name + " extension not supported.");
      }
      return extension;
    }, "get")
  };
}
__name(WebGLExtensions, "WebGLExtensions");
function WebGLGeometries(gl, attributes, info, bindingStates) {
  const geometries = {};
  const wireframeAttributes = /* @__PURE__ */ new WeakMap();
  function onGeometryDispose(event) {
    const geometry = event.target;
    if (geometry.index !== null) {
      attributes.remove(geometry.index);
    }
    for (const name in geometry.attributes) {
      attributes.remove(geometry.attributes[name]);
    }
    for (const name in geometry.morphAttributes) {
      const array = geometry.morphAttributes[name];
      for (let i = 0, l = array.length; i < l; i++) {
        attributes.remove(array[i]);
      }
    }
    geometry.removeEventListener("dispose", onGeometryDispose);
    delete geometries[geometry.id];
    const attribute = wireframeAttributes.get(geometry);
    if (attribute) {
      attributes.remove(attribute);
      wireframeAttributes.delete(geometry);
    }
    bindingStates.releaseStatesOfGeometry(geometry);
    if (geometry.isInstancedBufferGeometry === true) {
      delete geometry._maxInstanceCount;
    }
    info.memory.geometries--;
  }
  __name(onGeometryDispose, "onGeometryDispose");
  function get(object, geometry) {
    if (geometries[geometry.id] === true) return geometry;
    geometry.addEventListener("dispose", onGeometryDispose);
    geometries[geometry.id] = true;
    info.memory.geometries++;
    return geometry;
  }
  __name(get, "get");
  function update(geometry) {
    const geometryAttributes = geometry.attributes;
    for (const name in geometryAttributes) {
      attributes.update(geometryAttributes[name], gl.ARRAY_BUFFER);
    }
    const morphAttributes = geometry.morphAttributes;
    for (const name in morphAttributes) {
      const array = morphAttributes[name];
      for (let i = 0, l = array.length; i < l; i++) {
        attributes.update(array[i], gl.ARRAY_BUFFER);
      }
    }
  }
  __name(update, "update");
  function updateWireframeAttribute(geometry) {
    const indices = [];
    const geometryIndex = geometry.index;
    const geometryPosition = geometry.attributes.position;
    let version = 0;
    if (geometryIndex !== null) {
      const array = geometryIndex.array;
      version = geometryIndex.version;
      for (let i = 0, l = array.length; i < l; i += 3) {
        const a = array[i + 0];
        const b = array[i + 1];
        const c = array[i + 2];
        indices.push(a, b, b, c, c, a);
      }
    } else if (geometryPosition !== void 0) {
      const array = geometryPosition.array;
      version = geometryPosition.version;
      for (let i = 0, l = array.length / 3 - 1; i < l; i += 3) {
        const a = i + 0;
        const b = i + 1;
        const c = i + 2;
        indices.push(a, b, b, c, c, a);
      }
    } else {
      return;
    }
    const attribute = new (arrayNeedsUint32(indices) ? Uint32BufferAttribute : Uint16BufferAttribute)(indices, 1);
    attribute.version = version;
    const previousAttribute = wireframeAttributes.get(geometry);
    if (previousAttribute) attributes.remove(previousAttribute);
    wireframeAttributes.set(geometry, attribute);
  }
  __name(updateWireframeAttribute, "updateWireframeAttribute");
  function getWireframeAttribute(geometry) {
    const currentAttribute = wireframeAttributes.get(geometry);
    if (currentAttribute) {
      const geometryIndex = geometry.index;
      if (geometryIndex !== null) {
        if (currentAttribute.version < geometryIndex.version) {
          updateWireframeAttribute(geometry);
        }
      }
    } else {
      updateWireframeAttribute(geometry);
    }
    return wireframeAttributes.get(geometry);
  }
  __name(getWireframeAttribute, "getWireframeAttribute");
  return {
    get,
    update,
    getWireframeAttribute
  };
}
__name(WebGLGeometries, "WebGLGeometries");
function WebGLIndexedBufferRenderer(gl, extensions, info) {
  let mode;
  function setMode(value) {
    mode = value;
  }
  __name(setMode, "setMode");
  let type, bytesPerElement;
  function setIndex(value) {
    type = value.type;
    bytesPerElement = value.bytesPerElement;
  }
  __name(setIndex, "setIndex");
  function render(start, count) {
    gl.drawElements(mode, count, type, start * bytesPerElement);
    info.update(count, mode, 1);
  }
  __name(render, "render");
  function renderInstances(start, count, primcount) {
    if (primcount === 0) return;
    gl.drawElementsInstanced(mode, count, type, start * bytesPerElement, primcount);
    info.update(count, mode, primcount);
  }
  __name(renderInstances, "renderInstances");
  function renderMultiDraw(starts, counts, drawCount) {
    if (drawCount === 0) return;
    const extension = extensions.get("WEBGL_multi_draw");
    extension.multiDrawElementsWEBGL(mode, counts, 0, type, starts, 0, drawCount);
    let elementCount = 0;
    for (let i = 0; i < drawCount; i++) {
      elementCount += counts[i];
    }
    info.update(elementCount, mode, 1);
  }
  __name(renderMultiDraw, "renderMultiDraw");
  function renderMultiDrawInstances(starts, counts, drawCount, primcount) {
    if (drawCount === 0) return;
    const extension = extensions.get("WEBGL_multi_draw");
    if (extension === null) {
      for (let i = 0; i < starts.length; i++) {
        renderInstances(starts[i] / bytesPerElement, counts[i], primcount[i]);
      }
    } else {
      extension.multiDrawElementsInstancedWEBGL(mode, counts, 0, type, starts, 0, primcount, 0, drawCount);
      let elementCount = 0;
      for (let i = 0; i < drawCount; i++) {
        elementCount += counts[i] * primcount[i];
      }
      info.update(elementCount, mode, 1);
    }
  }
  __name(renderMultiDrawInstances, "renderMultiDrawInstances");
  this.setMode = setMode;
  this.setIndex = setIndex;
  this.render = render;
  this.renderInstances = renderInstances;
  this.renderMultiDraw = renderMultiDraw;
  this.renderMultiDrawInstances = renderMultiDrawInstances;
}
__name(WebGLIndexedBufferRenderer, "WebGLIndexedBufferRenderer");
function WebGLInfo(gl) {
  const memory = {
    geometries: 0,
    textures: 0
  };
  const render = {
    frame: 0,
    calls: 0,
    triangles: 0,
    points: 0,
    lines: 0
  };
  function update(count, mode, instanceCount) {
    render.calls++;
    switch (mode) {
      case gl.TRIANGLES:
        render.triangles += instanceCount * (count / 3);
        break;
      case gl.LINES:
        render.lines += instanceCount * (count / 2);
        break;
      case gl.LINE_STRIP:
        render.lines += instanceCount * (count - 1);
        break;
      case gl.LINE_LOOP:
        render.lines += instanceCount * count;
        break;
      case gl.POINTS:
        render.points += instanceCount * count;
        break;
      default:
        console.error("THREE.WebGLInfo: Unknown draw mode:", mode);
        break;
    }
  }
  __name(update, "update");
  function reset() {
    render.calls = 0;
    render.triangles = 0;
    render.points = 0;
    render.lines = 0;
  }
  __name(reset, "reset");
  return {
    memory,
    render,
    programs: null,
    autoReset: true,
    reset,
    update
  };
}
__name(WebGLInfo, "WebGLInfo");
function WebGLMorphtargets(gl, capabilities, textures) {
  const morphTextures = /* @__PURE__ */ new WeakMap();
  const morph = new Vector4();
  function update(object, geometry, program) {
    const objectInfluences = object.morphTargetInfluences;
    const morphAttribute = geometry.morphAttributes.position || geometry.morphAttributes.normal || geometry.morphAttributes.color;
    const morphTargetsCount = morphAttribute !== void 0 ? morphAttribute.length : 0;
    let entry = morphTextures.get(geometry);
    if (entry === void 0 || entry.count !== morphTargetsCount) {
      let disposeTexture = function() {
        texture.dispose();
        morphTextures.delete(geometry);
        geometry.removeEventListener("dispose", disposeTexture);
      };
      __name(disposeTexture, "disposeTexture");
      if (entry !== void 0) entry.texture.dispose();
      const hasMorphPosition = geometry.morphAttributes.position !== void 0;
      const hasMorphNormals = geometry.morphAttributes.normal !== void 0;
      const hasMorphColors = geometry.morphAttributes.color !== void 0;
      const morphTargets = geometry.morphAttributes.position || [];
      const morphNormals = geometry.morphAttributes.normal || [];
      const morphColors = geometry.morphAttributes.color || [];
      let vertexDataCount = 0;
      if (hasMorphPosition === true) vertexDataCount = 1;
      if (hasMorphNormals === true) vertexDataCount = 2;
      if (hasMorphColors === true) vertexDataCount = 3;
      let width = geometry.attributes.position.count * vertexDataCount;
      let height = 1;
      if (width > capabilities.maxTextureSize) {
        height = Math.ceil(width / capabilities.maxTextureSize);
        width = capabilities.maxTextureSize;
      }
      const buffer = new Float32Array(width * height * 4 * morphTargetsCount);
      const texture = new DataArrayTexture(buffer, width, height, morphTargetsCount);
      texture.type = FloatType;
      texture.needsUpdate = true;
      const vertexDataStride = vertexDataCount * 4;
      for (let i = 0; i < morphTargetsCount; i++) {
        const morphTarget = morphTargets[i];
        const morphNormal = morphNormals[i];
        const morphColor = morphColors[i];
        const offset = width * height * 4 * i;
        for (let j = 0; j < morphTarget.count; j++) {
          const stride = j * vertexDataStride;
          if (hasMorphPosition === true) {
            morph.fromBufferAttribute(morphTarget, j);
            buffer[offset + stride + 0] = morph.x;
            buffer[offset + stride + 1] = morph.y;
            buffer[offset + stride + 2] = morph.z;
            buffer[offset + stride + 3] = 0;
          }
          if (hasMorphNormals === true) {
            morph.fromBufferAttribute(morphNormal, j);
            buffer[offset + stride + 4] = morph.x;
            buffer[offset + stride + 5] = morph.y;
            buffer[offset + stride + 6] = morph.z;
            buffer[offset + stride + 7] = 0;
          }
          if (hasMorphColors === true) {
            morph.fromBufferAttribute(morphColor, j);
            buffer[offset + stride + 8] = morph.x;
            buffer[offset + stride + 9] = morph.y;
            buffer[offset + stride + 10] = morph.z;
            buffer[offset + stride + 11] = morphColor.itemSize === 4 ? morph.w : 1;
          }
        }
      }
      entry = {
        count: morphTargetsCount,
        texture,
        size: new Vector2(width, height)
      };
      morphTextures.set(geometry, entry);
      geometry.addEventListener("dispose", disposeTexture);
    }
    if (object.isInstancedMesh === true && object.morphTexture !== null) {
      program.getUniforms().setValue(gl, "morphTexture", object.morphTexture, textures);
    } else {
      let morphInfluencesSum = 0;
      for (let i = 0; i < objectInfluences.length; i++) {
        morphInfluencesSum += objectInfluences[i];
      }
      const morphBaseInfluence = geometry.morphTargetsRelative ? 1 : 1 - morphInfluencesSum;
      program.getUniforms().setValue(gl, "morphTargetBaseInfluence", morphBaseInfluence);
      program.getUniforms().setValue(gl, "morphTargetInfluences", objectInfluences);
    }
    program.getUniforms().setValue(gl, "morphTargetsTexture", entry.texture, textures);
    program.getUniforms().setValue(gl, "morphTargetsTextureSize", entry.size);
  }
  __name(update, "update");
  return {
    update
  };
}
__name(WebGLMorphtargets, "WebGLMorphtargets");
function WebGLObjects(gl, geometries, attributes, info) {
  let updateMap = /* @__PURE__ */ new WeakMap();
  function update(object) {
    const frame = info.render.frame;
    const geometry = object.geometry;
    const buffergeometry = geometries.get(object, geometry);
    if (updateMap.get(buffergeometry) !== frame) {
      geometries.update(buffergeometry);
      updateMap.set(buffergeometry, frame);
    }
    if (object.isInstancedMesh) {
      if (object.hasEventListener("dispose", onInstancedMeshDispose) === false) {
        object.addEventListener("dispose", onInstancedMeshDispose);
      }
      if (updateMap.get(object) !== frame) {
        attributes.update(object.instanceMatrix, gl.ARRAY_BUFFER);
        if (object.instanceColor !== null) {
          attributes.update(object.instanceColor, gl.ARRAY_BUFFER);
        }
        updateMap.set(object, frame);
      }
    }
    if (object.isSkinnedMesh) {
      const skeleton = object.skeleton;
      if (updateMap.get(skeleton) !== frame) {
        skeleton.update();
        updateMap.set(skeleton, frame);
      }
    }
    return buffergeometry;
  }
  __name(update, "update");
  function dispose() {
    updateMap = /* @__PURE__ */ new WeakMap();
  }
  __name(dispose, "dispose");
  function onInstancedMeshDispose(event) {
    const instancedMesh = event.target;
    instancedMesh.removeEventListener("dispose", onInstancedMeshDispose);
    attributes.remove(instancedMesh.instanceMatrix);
    if (instancedMesh.instanceColor !== null) attributes.remove(instancedMesh.instanceColor);
  }
  __name(onInstancedMeshDispose, "onInstancedMeshDispose");
  return {
    update,
    dispose
  };
}
__name(WebGLObjects, "WebGLObjects");
class DepthTexture extends Texture {
  static {
    __name(this, "DepthTexture");
  }
  constructor(width, height, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, format = DepthFormat) {
    if (format !== DepthFormat && format !== DepthStencilFormat) {
      throw new Error("DepthTexture format must be either THREE.DepthFormat or THREE.DepthStencilFormat");
    }
    if (type === void 0 && format === DepthFormat) type = UnsignedIntType;
    if (type === void 0 && format === DepthStencilFormat) type = UnsignedInt248Type;
    super(null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
    this.isDepthTexture = true;
    this.image = { width, height };
    this.magFilter = magFilter !== void 0 ? magFilter : NearestFilter;
    this.minFilter = minFilter !== void 0 ? minFilter : NearestFilter;
    this.flipY = false;
    this.generateMipmaps = false;
    this.compareFunction = null;
  }
  copy(source) {
    super.copy(source);
    this.compareFunction = source.compareFunction;
    return this;
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    if (this.compareFunction !== null) data.compareFunction = this.compareFunction;
    return data;
  }
}
const emptyTexture = /* @__PURE__ */ new Texture();
const emptyShadowTexture = /* @__PURE__ */ new DepthTexture(1, 1);
const emptyArrayTexture = /* @__PURE__ */ new DataArrayTexture();
const empty3dTexture = /* @__PURE__ */ new Data3DTexture();
const emptyCubeTexture = /* @__PURE__ */ new CubeTexture();
const arrayCacheF32 = [];
const arrayCacheI32 = [];
const mat4array = new Float32Array(16);
const mat3array = new Float32Array(9);
const mat2array = new Float32Array(4);
function flatten(array, nBlocks, blockSize) {
  const firstElem = array[0];
  if (firstElem <= 0 || firstElem > 0) return array;
  const n = nBlocks * blockSize;
  let r = arrayCacheF32[n];
  if (r === void 0) {
    r = new Float32Array(n);
    arrayCacheF32[n] = r;
  }
  if (nBlocks !== 0) {
    firstElem.toArray(r, 0);
    for (let i = 1, offset = 0; i !== nBlocks; ++i) {
      offset += blockSize;
      array[i].toArray(r, offset);
    }
  }
  return r;
}
__name(flatten, "flatten");
function arraysEqual(a, b) {
  if (a.length !== b.length) return false;
  for (let i = 0, l = a.length; i < l; i++) {
    if (a[i] !== b[i]) return false;
  }
  return true;
}
__name(arraysEqual, "arraysEqual");
function copyArray(a, b) {
  for (let i = 0, l = b.length; i < l; i++) {
    a[i] = b[i];
  }
}
__name(copyArray, "copyArray");
function allocTexUnits(textures, n) {
  let r = arrayCacheI32[n];
  if (r === void 0) {
    r = new Int32Array(n);
    arrayCacheI32[n] = r;
  }
  for (let i = 0; i !== n; ++i) {
    r[i] = textures.allocateTextureUnit();
  }
  return r;
}
__name(allocTexUnits, "allocTexUnits");
function setValueV1f(gl, v) {
  const cache = this.cache;
  if (cache[0] === v) return;
  gl.uniform1f(this.addr, v);
  cache[0] = v;
}
__name(setValueV1f, "setValueV1f");
function setValueV2f(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y) {
      gl.uniform2f(this.addr, v.x, v.y);
      cache[0] = v.x;
      cache[1] = v.y;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform2fv(this.addr, v);
    copyArray(cache, v);
  }
}
__name(setValueV2f, "setValueV2f");
function setValueV3f(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z) {
      gl.uniform3f(this.addr, v.x, v.y, v.z);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
    }
  } else if (v.r !== void 0) {
    if (cache[0] !== v.r || cache[1] !== v.g || cache[2] !== v.b) {
      gl.uniform3f(this.addr, v.r, v.g, v.b);
      cache[0] = v.r;
      cache[1] = v.g;
      cache[2] = v.b;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform3fv(this.addr, v);
    copyArray(cache, v);
  }
}
__name(setValueV3f, "setValueV3f");
function setValueV4f(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z || cache[3] !== v.w) {
      gl.uniform4f(this.addr, v.x, v.y, v.z, v.w);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
      cache[3] = v.w;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform4fv(this.addr, v);
    copyArray(cache, v);
  }
}
__name(setValueV4f, "setValueV4f");
function setValueM2(gl, v) {
  const cache = this.cache;
  const elements = v.elements;
  if (elements === void 0) {
    if (arraysEqual(cache, v)) return;
    gl.uniformMatrix2fv(this.addr, false, v);
    copyArray(cache, v);
  } else {
    if (arraysEqual(cache, elements)) return;
    mat2array.set(elements);
    gl.uniformMatrix2fv(this.addr, false, mat2array);
    copyArray(cache, elements);
  }
}
__name(setValueM2, "setValueM2");
function setValueM3(gl, v) {
  const cache = this.cache;
  const elements = v.elements;
  if (elements === void 0) {
    if (arraysEqual(cache, v)) return;
    gl.uniformMatrix3fv(this.addr, false, v);
    copyArray(cache, v);
  } else {
    if (arraysEqual(cache, elements)) return;
    mat3array.set(elements);
    gl.uniformMatrix3fv(this.addr, false, mat3array);
    copyArray(cache, elements);
  }
}
__name(setValueM3, "setValueM3");
function setValueM4(gl, v) {
  const cache = this.cache;
  const elements = v.elements;
  if (elements === void 0) {
    if (arraysEqual(cache, v)) return;
    gl.uniformMatrix4fv(this.addr, false, v);
    copyArray(cache, v);
  } else {
    if (arraysEqual(cache, elements)) return;
    mat4array.set(elements);
    gl.uniformMatrix4fv(this.addr, false, mat4array);
    copyArray(cache, elements);
  }
}
__name(setValueM4, "setValueM4");
function setValueV1i(gl, v) {
  const cache = this.cache;
  if (cache[0] === v) return;
  gl.uniform1i(this.addr, v);
  cache[0] = v;
}
__name(setValueV1i, "setValueV1i");
function setValueV2i(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y) {
      gl.uniform2i(this.addr, v.x, v.y);
      cache[0] = v.x;
      cache[1] = v.y;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform2iv(this.addr, v);
    copyArray(cache, v);
  }
}
__name(setValueV2i, "setValueV2i");
function setValueV3i(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z) {
      gl.uniform3i(this.addr, v.x, v.y, v.z);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform3iv(this.addr, v);
    copyArray(cache, v);
  }
}
__name(setValueV3i, "setValueV3i");
function setValueV4i(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z || cache[3] !== v.w) {
      gl.uniform4i(this.addr, v.x, v.y, v.z, v.w);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
      cache[3] = v.w;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform4iv(this.addr, v);
    copyArray(cache, v);
  }
}
__name(setValueV4i, "setValueV4i");
function setValueV1ui(gl, v) {
  const cache = this.cache;
  if (cache[0] === v) return;
  gl.uniform1ui(this.addr, v);
  cache[0] = v;
}
__name(setValueV1ui, "setValueV1ui");
function setValueV2ui(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y) {
      gl.uniform2ui(this.addr, v.x, v.y);
      cache[0] = v.x;
      cache[1] = v.y;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform2uiv(this.addr, v);
    copyArray(cache, v);
  }
}
__name(setValueV2ui, "setValueV2ui");
function setValueV3ui(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z) {
      gl.uniform3ui(this.addr, v.x, v.y, v.z);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform3uiv(this.addr, v);
    copyArray(cache, v);
  }
}
__name(setValueV3ui, "setValueV3ui");
function setValueV4ui(gl, v) {
  const cache = this.cache;
  if (v.x !== void 0) {
    if (cache[0] !== v.x || cache[1] !== v.y || cache[2] !== v.z || cache[3] !== v.w) {
      gl.uniform4ui(this.addr, v.x, v.y, v.z, v.w);
      cache[0] = v.x;
      cache[1] = v.y;
      cache[2] = v.z;
      cache[3] = v.w;
    }
  } else {
    if (arraysEqual(cache, v)) return;
    gl.uniform4uiv(this.addr, v);
    copyArray(cache, v);
  }
}
__name(setValueV4ui, "setValueV4ui");
function setValueT1(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  let emptyTexture2D;
  if (this.type === gl.SAMPLER_2D_SHADOW) {
    emptyShadowTexture.compareFunction = LessEqualCompare;
    emptyTexture2D = emptyShadowTexture;
  } else {
    emptyTexture2D = emptyTexture;
  }
  textures.setTexture2D(v || emptyTexture2D, unit);
}
__name(setValueT1, "setValueT1");
function setValueT3D1(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  textures.setTexture3D(v || empty3dTexture, unit);
}
__name(setValueT3D1, "setValueT3D1");
function setValueT6(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  textures.setTextureCube(v || emptyCubeTexture, unit);
}
__name(setValueT6, "setValueT6");
function setValueT2DArray1(gl, v, textures) {
  const cache = this.cache;
  const unit = textures.allocateTextureUnit();
  if (cache[0] !== unit) {
    gl.uniform1i(this.addr, unit);
    cache[0] = unit;
  }
  textures.setTexture2DArray(v || emptyArrayTexture, unit);
}
__name(setValueT2DArray1, "setValueT2DArray1");
function getSingularSetter(type) {
  switch (type) {
    case 5126:
      return setValueV1f;
    // FLOAT
    case 35664:
      return setValueV2f;
    // _VEC2
    case 35665:
      return setValueV3f;
    // _VEC3
    case 35666:
      return setValueV4f;
    // _VEC4
    case 35674:
      return setValueM2;
    // _MAT2
    case 35675:
      return setValueM3;
    // _MAT3
    case 35676:
      return setValueM4;
    // _MAT4
    case 5124:
    case 35670:
      return setValueV1i;
    // INT, BOOL
    case 35667:
    case 35671:
      return setValueV2i;
    // _VEC2
    case 35668:
    case 35672:
      return setValueV3i;
    // _VEC3
    case 35669:
    case 35673:
      return setValueV4i;
    // _VEC4
    case 5125:
      return setValueV1ui;
    // UINT
    case 36294:
      return setValueV2ui;
    // _VEC2
    case 36295:
      return setValueV3ui;
    // _VEC3
    case 36296:
      return setValueV4ui;
    // _VEC4
    case 35678:
    // SAMPLER_2D
    case 36198:
    // SAMPLER_EXTERNAL_OES
    case 36298:
    // INT_SAMPLER_2D
    case 36306:
    // UNSIGNED_INT_SAMPLER_2D
    case 35682:
      return setValueT1;
    case 35679:
    // SAMPLER_3D
    case 36299:
    // INT_SAMPLER_3D
    case 36307:
      return setValueT3D1;
    case 35680:
    // SAMPLER_CUBE
    case 36300:
    // INT_SAMPLER_CUBE
    case 36308:
    // UNSIGNED_INT_SAMPLER_CUBE
    case 36293:
      return setValueT6;
    case 36289:
    // SAMPLER_2D_ARRAY
    case 36303:
    // INT_SAMPLER_2D_ARRAY
    case 36311:
    // UNSIGNED_INT_SAMPLER_2D_ARRAY
    case 36292:
      return setValueT2DArray1;
  }
}
__name(getSingularSetter, "getSingularSetter");
function setValueV1fArray(gl, v) {
  gl.uniform1fv(this.addr, v);
}
__name(setValueV1fArray, "setValueV1fArray");
function setValueV2fArray(gl, v) {
  const data = flatten(v, this.size, 2);
  gl.uniform2fv(this.addr, data);
}
__name(setValueV2fArray, "setValueV2fArray");
function setValueV3fArray(gl, v) {
  const data = flatten(v, this.size, 3);
  gl.uniform3fv(this.addr, data);
}
__name(setValueV3fArray, "setValueV3fArray");
function setValueV4fArray(gl, v) {
  const data = flatten(v, this.size, 4);
  gl.uniform4fv(this.addr, data);
}
__name(setValueV4fArray, "setValueV4fArray");
function setValueM2Array(gl, v) {
  const data = flatten(v, this.size, 4);
  gl.uniformMatrix2fv(this.addr, false, data);
}
__name(setValueM2Array, "setValueM2Array");
function setValueM3Array(gl, v) {
  const data = flatten(v, this.size, 9);
  gl.uniformMatrix3fv(this.addr, false, data);
}
__name(setValueM3Array, "setValueM3Array");
function setValueM4Array(gl, v) {
  const data = flatten(v, this.size, 16);
  gl.uniformMatrix4fv(this.addr, false, data);
}
__name(setValueM4Array, "setValueM4Array");
function setValueV1iArray(gl, v) {
  gl.uniform1iv(this.addr, v);
}
__name(setValueV1iArray, "setValueV1iArray");
function setValueV2iArray(gl, v) {
  gl.uniform2iv(this.addr, v);
}
__name(setValueV2iArray, "setValueV2iArray");
function setValueV3iArray(gl, v) {
  gl.uniform3iv(this.addr, v);
}
__name(setValueV3iArray, "setValueV3iArray");
function setValueV4iArray(gl, v) {
  gl.uniform4iv(this.addr, v);
}
__name(setValueV4iArray, "setValueV4iArray");
function setValueV1uiArray(gl, v) {
  gl.uniform1uiv(this.addr, v);
}
__name(setValueV1uiArray, "setValueV1uiArray");
function setValueV2uiArray(gl, v) {
  gl.uniform2uiv(this.addr, v);
}
__name(setValueV2uiArray, "setValueV2uiArray");
function setValueV3uiArray(gl, v) {
  gl.uniform3uiv(this.addr, v);
}
__name(setValueV3uiArray, "setValueV3uiArray");
function setValueV4uiArray(gl, v) {
  gl.uniform4uiv(this.addr, v);
}
__name(setValueV4uiArray, "setValueV4uiArray");
function setValueT1Array(gl, v, textures) {
  const cache = this.cache;
  const n = v.length;
  const units = allocTexUnits(textures, n);
  if (!arraysEqual(cache, units)) {
    gl.uniform1iv(this.addr, units);
    copyArray(cache, units);
  }
  for (let i = 0; i !== n; ++i) {
    textures.setTexture2D(v[i] || emptyTexture, units[i]);
  }
}
__name(setValueT1Array, "setValueT1Array");
function setValueT3DArray(gl, v, textures) {
  const cache = this.cache;
  const n = v.length;
  const units = allocTexUnits(textures, n);
  if (!arraysEqual(cache, units)) {
    gl.uniform1iv(this.addr, units);
    copyArray(cache, units);
  }
  for (let i = 0; i !== n; ++i) {
    textures.setTexture3D(v[i] || empty3dTexture, units[i]);
  }
}
__name(setValueT3DArray, "setValueT3DArray");
function setValueT6Array(gl, v, textures) {
  const cache = this.cache;
  const n = v.length;
  const units = allocTexUnits(textures, n);
  if (!arraysEqual(cache, units)) {
    gl.uniform1iv(this.addr, units);
    copyArray(cache, units);
  }
  for (let i = 0; i !== n; ++i) {
    textures.setTextureCube(v[i] || emptyCubeTexture, units[i]);
  }
}
__name(setValueT6Array, "setValueT6Array");
function setValueT2DArrayArray(gl, v, textures) {
  const cache = this.cache;
  const n = v.length;
  const units = allocTexUnits(textures, n);
  if (!arraysEqual(cache, units)) {
    gl.uniform1iv(this.addr, units);
    copyArray(cache, units);
  }
  for (let i = 0; i !== n; ++i) {
    textures.setTexture2DArray(v[i] || emptyArrayTexture, units[i]);
  }
}
__name(setValueT2DArrayArray, "setValueT2DArrayArray");
function getPureArraySetter(type) {
  switch (type) {
    case 5126:
      return setValueV1fArray;
    // FLOAT
    case 35664:
      return setValueV2fArray;
    // _VEC2
    case 35665:
      return setValueV3fArray;
    // _VEC3
    case 35666:
      return setValueV4fArray;
    // _VEC4
    case 35674:
      return setValueM2Array;
    // _MAT2
    case 35675:
      return setValueM3Array;
    // _MAT3
    case 35676:
      return setValueM4Array;
    // _MAT4
    case 5124:
    case 35670:
      return setValueV1iArray;
    // INT, BOOL
    case 35667:
    case 35671:
      return setValueV2iArray;
    // _VEC2
    case 35668:
    case 35672:
      return setValueV3iArray;
    // _VEC3
    case 35669:
    case 35673:
      return setValueV4iArray;
    // _VEC4
    case 5125:
      return setValueV1uiArray;
    // UINT
    case 36294:
      return setValueV2uiArray;
    // _VEC2
    case 36295:
      return setValueV3uiArray;
    // _VEC3
    case 36296:
      return setValueV4uiArray;
    // _VEC4
    case 35678:
    // SAMPLER_2D
    case 36198:
    // SAMPLER_EXTERNAL_OES
    case 36298:
    // INT_SAMPLER_2D
    case 36306:
    // UNSIGNED_INT_SAMPLER_2D
    case 35682:
      return setValueT1Array;
    case 35679:
    // SAMPLER_3D
    case 36299:
    // INT_SAMPLER_3D
    case 36307:
      return setValueT3DArray;
    case 35680:
    // SAMPLER_CUBE
    case 36300:
    // INT_SAMPLER_CUBE
    case 36308:
    // UNSIGNED_INT_SAMPLER_CUBE
    case 36293:
      return setValueT6Array;
    case 36289:
    // SAMPLER_2D_ARRAY
    case 36303:
    // INT_SAMPLER_2D_ARRAY
    case 36311:
    // UNSIGNED_INT_SAMPLER_2D_ARRAY
    case 36292:
      return setValueT2DArrayArray;
  }
}
__name(getPureArraySetter, "getPureArraySetter");
class SingleUniform {
  static {
    __name(this, "SingleUniform");
  }
  constructor(id, activeInfo, addr) {
    this.id = id;
    this.addr = addr;
    this.cache = [];
    this.type = activeInfo.type;
    this.setValue = getSingularSetter(activeInfo.type);
  }
}
class PureArrayUniform {
  static {
    __name(this, "PureArrayUniform");
  }
  constructor(id, activeInfo, addr) {
    this.id = id;
    this.addr = addr;
    this.cache = [];
    this.type = activeInfo.type;
    this.size = activeInfo.size;
    this.setValue = getPureArraySetter(activeInfo.type);
  }
}
class StructuredUniform {
  static {
    __name(this, "StructuredUniform");
  }
  constructor(id) {
    this.id = id;
    this.seq = [];
    this.map = {};
  }
  setValue(gl, value, textures) {
    const seq = this.seq;
    for (let i = 0, n = seq.length; i !== n; ++i) {
      const u = seq[i];
      u.setValue(gl, value[u.id], textures);
    }
  }
}
const RePathPart = /(\w+)(\])?(\[|\.)?/g;
function addUniform(container, uniformObject) {
  container.seq.push(uniformObject);
  container.map[uniformObject.id] = uniformObject;
}
__name(addUniform, "addUniform");
function parseUniform(activeInfo, addr, container) {
  const path = activeInfo.name, pathLength = path.length;
  RePathPart.lastIndex = 0;
  while (true) {
    const match = RePathPart.exec(path), matchEnd = RePathPart.lastIndex;
    let id = match[1];
    const idIsIndex = match[2] === "]", subscript = match[3];
    if (idIsIndex) id = id | 0;
    if (subscript === void 0 || subscript === "[" && matchEnd + 2 === pathLength) {
      addUniform(container, subscript === void 0 ? new SingleUniform(id, activeInfo, addr) : new PureArrayUniform(id, activeInfo, addr));
      break;
    } else {
      const map = container.map;
      let next = map[id];
      if (next === void 0) {
        next = new StructuredUniform(id);
        addUniform(container, next);
      }
      container = next;
    }
  }
}
__name(parseUniform, "parseUniform");
class WebGLUniforms {
  static {
    __name(this, "WebGLUniforms");
  }
  constructor(gl, program) {
    this.seq = [];
    this.map = {};
    const n = gl.getProgramParameter(program, gl.ACTIVE_UNIFORMS);
    for (let i = 0; i < n; ++i) {
      const info = gl.getActiveUniform(program, i), addr = gl.getUniformLocation(program, info.name);
      parseUniform(info, addr, this);
    }
  }
  setValue(gl, name, value, textures) {
    const u = this.map[name];
    if (u !== void 0) u.setValue(gl, value, textures);
  }
  setOptional(gl, object, name) {
    const v = object[name];
    if (v !== void 0) this.setValue(gl, name, v);
  }
  static upload(gl, seq, values, textures) {
    for (let i = 0, n = seq.length; i !== n; ++i) {
      const u = seq[i], v = values[u.id];
      if (v.needsUpdate !== false) {
        u.setValue(gl, v.value, textures);
      }
    }
  }
  static seqWithValue(seq, values) {
    const r = [];
    for (let i = 0, n = seq.length; i !== n; ++i) {
      const u = seq[i];
      if (u.id in values) r.push(u);
    }
    return r;
  }
}
function WebGLShader(gl, type, string) {
  const shader = gl.createShader(type);
  gl.shaderSource(shader, string);
  gl.compileShader(shader);
  return shader;
}
__name(WebGLShader, "WebGLShader");
const COMPLETION_STATUS_KHR = 37297;
let programIdCount = 0;
function handleSource(string, errorLine) {
  const lines = string.split("\n");
  const lines2 = [];
  const from = Math.max(errorLine - 6, 0);
  const to = Math.min(errorLine + 6, lines.length);
  for (let i = from; i < to; i++) {
    const line = i + 1;
    lines2.push(`${line === errorLine ? ">" : " "} ${line}: ${lines[i]}`);
  }
  return lines2.join("\n");
}
__name(handleSource, "handleSource");
const _m0 = /* @__PURE__ */ new Matrix3();
function getEncodingComponents(colorSpace) {
  ColorManagement._getMatrix(_m0, ColorManagement.workingColorSpace, colorSpace);
  const encodingMatrix = `mat3( ${_m0.elements.map((v) => v.toFixed(4))} )`;
  switch (ColorManagement.getTransfer(colorSpace)) {
    case LinearTransfer:
      return [encodingMatrix, "LinearTransferOETF"];
    case SRGBTransfer:
      return [encodingMatrix, "sRGBTransferOETF"];
    default:
      console.warn("THREE.WebGLProgram: Unsupported color space: ", colorSpace);
      return [encodingMatrix, "LinearTransferOETF"];
  }
}
__name(getEncodingComponents, "getEncodingComponents");
function getShaderErrors(gl, shader, type) {
  const status = gl.getShaderParameter(shader, gl.COMPILE_STATUS);
  const errors = gl.getShaderInfoLog(shader).trim();
  if (status && errors === "") return "";
  const errorMatches = /ERROR: 0:(\d+)/.exec(errors);
  if (errorMatches) {
    const errorLine = parseInt(errorMatches[1]);
    return type.toUpperCase() + "\n\n" + errors + "\n\n" + handleSource(gl.getShaderSource(shader), errorLine);
  } else {
    return errors;
  }
}
__name(getShaderErrors, "getShaderErrors");
function getTexelEncodingFunction(functionName, colorSpace) {
  const components = getEncodingComponents(colorSpace);
  return [
    `vec4 ${functionName}( vec4 value ) {`,
    `	return ${components[1]}( vec4( value.rgb * ${components[0]}, value.a ) );`,
    "}"
  ].join("\n");
}
__name(getTexelEncodingFunction, "getTexelEncodingFunction");
function getToneMappingFunction(functionName, toneMapping) {
  let toneMappingName;
  switch (toneMapping) {
    case LinearToneMapping:
      toneMappingName = "Linear";
      break;
    case ReinhardToneMapping:
      toneMappingName = "Reinhard";
      break;
    case CineonToneMapping:
      toneMappingName = "Cineon";
      break;
    case ACESFilmicToneMapping:
      toneMappingName = "ACESFilmic";
      break;
    case AgXToneMapping:
      toneMappingName = "AgX";
      break;
    case NeutralToneMapping:
      toneMappingName = "Neutral";
      break;
    case CustomToneMapping:
      toneMappingName = "Custom";
      break;
    default:
      console.warn("THREE.WebGLProgram: Unsupported toneMapping:", toneMapping);
      toneMappingName = "Linear";
  }
  return "vec3 " + functionName + "( vec3 color ) { return " + toneMappingName + "ToneMapping( color ); }";
}
__name(getToneMappingFunction, "getToneMappingFunction");
const _v0$1 = /* @__PURE__ */ new Vector3();
function getLuminanceFunction() {
  ColorManagement.getLuminanceCoefficients(_v0$1);
  const r = _v0$1.x.toFixed(4);
  const g = _v0$1.y.toFixed(4);
  const b = _v0$1.z.toFixed(4);
  return [
    "float luminance( const in vec3 rgb ) {",
    `	const vec3 weights = vec3( ${r}, ${g}, ${b} );`,
    "	return dot( weights, rgb );",
    "}"
  ].join("\n");
}
__name(getLuminanceFunction, "getLuminanceFunction");
function generateVertexExtensions(parameters) {
  const chunks = [
    parameters.extensionClipCullDistance ? "#extension GL_ANGLE_clip_cull_distance : require" : "",
    parameters.extensionMultiDraw ? "#extension GL_ANGLE_multi_draw : require" : ""
  ];
  return chunks.filter(filterEmptyLine).join("\n");
}
__name(generateVertexExtensions, "generateVertexExtensions");
function generateDefines(defines) {
  const chunks = [];
  for (const name in defines) {
    const value = defines[name];
    if (value === false) continue;
    chunks.push("#define " + name + " " + value);
  }
  return chunks.join("\n");
}
__name(generateDefines, "generateDefines");
function fetchAttributeLocations(gl, program) {
  const attributes = {};
  const n = gl.getProgramParameter(program, gl.ACTIVE_ATTRIBUTES);
  for (let i = 0; i < n; i++) {
    const info = gl.getActiveAttrib(program, i);
    const name = info.name;
    let locationSize = 1;
    if (info.type === gl.FLOAT_MAT2) locationSize = 2;
    if (info.type === gl.FLOAT_MAT3) locationSize = 3;
    if (info.type === gl.FLOAT_MAT4) locationSize = 4;
    attributes[name] = {
      type: info.type,
      location: gl.getAttribLocation(program, name),
      locationSize
    };
  }
  return attributes;
}
__name(fetchAttributeLocations, "fetchAttributeLocations");
function filterEmptyLine(string) {
  return string !== "";
}
__name(filterEmptyLine, "filterEmptyLine");
function replaceLightNums(string, parameters) {
  const numSpotLightCoords = parameters.numSpotLightShadows + parameters.numSpotLightMaps - parameters.numSpotLightShadowsWithMaps;
  return string.replace(/NUM_DIR_LIGHTS/g, parameters.numDirLights).replace(/NUM_SPOT_LIGHTS/g, parameters.numSpotLights).replace(/NUM_SPOT_LIGHT_MAPS/g, parameters.numSpotLightMaps).replace(/NUM_SPOT_LIGHT_COORDS/g, numSpotLightCoords).replace(/NUM_RECT_AREA_LIGHTS/g, parameters.numRectAreaLights).replace(/NUM_POINT_LIGHTS/g, parameters.numPointLights).replace(/NUM_HEMI_LIGHTS/g, parameters.numHemiLights).replace(/NUM_DIR_LIGHT_SHADOWS/g, parameters.numDirLightShadows).replace(/NUM_SPOT_LIGHT_SHADOWS_WITH_MAPS/g, parameters.numSpotLightShadowsWithMaps).replace(/NUM_SPOT_LIGHT_SHADOWS/g, parameters.numSpotLightShadows).replace(/NUM_POINT_LIGHT_SHADOWS/g, parameters.numPointLightShadows);
}
__name(replaceLightNums, "replaceLightNums");
function replaceClippingPlaneNums(string, parameters) {
  return string.replace(/NUM_CLIPPING_PLANES/g, parameters.numClippingPlanes).replace(/UNION_CLIPPING_PLANES/g, parameters.numClippingPlanes - parameters.numClipIntersection);
}
__name(replaceClippingPlaneNums, "replaceClippingPlaneNums");
const includePattern = /^[ \t]*#include +<([\w\d./]+)>/gm;
function resolveIncludes(string) {
  return string.replace(includePattern, includeReplacer);
}
__name(resolveIncludes, "resolveIncludes");
const shaderChunkMap = /* @__PURE__ */ new Map();
function includeReplacer(match, include) {
  let string = ShaderChunk[include];
  if (string === void 0) {
    const newInclude = shaderChunkMap.get(include);
    if (newInclude !== void 0) {
      string = ShaderChunk[newInclude];
      console.warn('THREE.WebGLRenderer: Shader chunk "%s" has been deprecated. Use "%s" instead.', include, newInclude);
    } else {
      throw new Error("Can not resolve #include <" + include + ">");
    }
  }
  return resolveIncludes(string);
}
__name(includeReplacer, "includeReplacer");
const unrollLoopPattern = /#pragma unroll_loop_start\s+for\s*\(\s*int\s+i\s*=\s*(\d+)\s*;\s*i\s*<\s*(\d+)\s*;\s*i\s*\+\+\s*\)\s*{([\s\S]+?)}\s+#pragma unroll_loop_end/g;
function unrollLoops(string) {
  return string.replace(unrollLoopPattern, loopReplacer);
}
__name(unrollLoops, "unrollLoops");
function loopReplacer(match, start, end, snippet) {
  let string = "";
  for (let i = parseInt(start); i < parseInt(end); i++) {
    string += snippet.replace(/\[\s*i\s*\]/g, "[ " + i + " ]").replace(/UNROLLED_LOOP_INDEX/g, i);
  }
  return string;
}
__name(loopReplacer, "loopReplacer");
function generatePrecision(parameters) {
  let precisionstring = `precision ${parameters.precision} float;
	precision ${parameters.precision} int;
	precision ${parameters.precision} sampler2D;
	precision ${parameters.precision} samplerCube;
	precision ${parameters.precision} sampler3D;
	precision ${parameters.precision} sampler2DArray;
	precision ${parameters.precision} sampler2DShadow;
	precision ${parameters.precision} samplerCubeShadow;
	precision ${parameters.precision} sampler2DArrayShadow;
	precision ${parameters.precision} isampler2D;
	precision ${parameters.precision} isampler3D;
	precision ${parameters.precision} isamplerCube;
	precision ${parameters.precision} isampler2DArray;
	precision ${parameters.precision} usampler2D;
	precision ${parameters.precision} usampler3D;
	precision ${parameters.precision} usamplerCube;
	precision ${parameters.precision} usampler2DArray;
	`;
  if (parameters.precision === "highp") {
    precisionstring += "\n#define HIGH_PRECISION";
  } else if (parameters.precision === "mediump") {
    precisionstring += "\n#define MEDIUM_PRECISION";
  } else if (parameters.precision === "lowp") {
    precisionstring += "\n#define LOW_PRECISION";
  }
  return precisionstring;
}
__name(generatePrecision, "generatePrecision");
function generateShadowMapTypeDefine(parameters) {
  let shadowMapTypeDefine = "SHADOWMAP_TYPE_BASIC";
  if (parameters.shadowMapType === PCFShadowMap) {
    shadowMapTypeDefine = "SHADOWMAP_TYPE_PCF";
  } else if (parameters.shadowMapType === PCFSoftShadowMap) {
    shadowMapTypeDefine = "SHADOWMAP_TYPE_PCF_SOFT";
  } else if (parameters.shadowMapType === VSMShadowMap) {
    shadowMapTypeDefine = "SHADOWMAP_TYPE_VSM";
  }
  return shadowMapTypeDefine;
}
__name(generateShadowMapTypeDefine, "generateShadowMapTypeDefine");
function generateEnvMapTypeDefine(parameters) {
  let envMapTypeDefine = "ENVMAP_TYPE_CUBE";
  if (parameters.envMap) {
    switch (parameters.envMapMode) {
      case CubeReflectionMapping:
      case CubeRefractionMapping:
        envMapTypeDefine = "ENVMAP_TYPE_CUBE";
        break;
      case CubeUVReflectionMapping:
        envMapTypeDefine = "ENVMAP_TYPE_CUBE_UV";
        break;
    }
  }
  return envMapTypeDefine;
}
__name(generateEnvMapTypeDefine, "generateEnvMapTypeDefine");
function generateEnvMapModeDefine(parameters) {
  let envMapModeDefine = "ENVMAP_MODE_REFLECTION";
  if (parameters.envMap) {
    switch (parameters.envMapMode) {
      case CubeRefractionMapping:
        envMapModeDefine = "ENVMAP_MODE_REFRACTION";
        break;
    }
  }
  return envMapModeDefine;
}
__name(generateEnvMapModeDefine, "generateEnvMapModeDefine");
function generateEnvMapBlendingDefine(parameters) {
  let envMapBlendingDefine = "ENVMAP_BLENDING_NONE";
  if (parameters.envMap) {
    switch (parameters.combine) {
      case MultiplyOperation:
        envMapBlendingDefine = "ENVMAP_BLENDING_MULTIPLY";
        break;
      case MixOperation:
        envMapBlendingDefine = "ENVMAP_BLENDING_MIX";
        break;
      case AddOperation:
        envMapBlendingDefine = "ENVMAP_BLENDING_ADD";
        break;
    }
  }
  return envMapBlendingDefine;
}
__name(generateEnvMapBlendingDefine, "generateEnvMapBlendingDefine");
function generateCubeUVSize(parameters) {
  const imageHeight = parameters.envMapCubeUVHeight;
  if (imageHeight === null) return null;
  const maxMip = Math.log2(imageHeight) - 2;
  const texelHeight = 1 / imageHeight;
  const texelWidth = 1 / (3 * Math.max(Math.pow(2, maxMip), 7 * 16));
  return { texelWidth, texelHeight, maxMip };
}
__name(generateCubeUVSize, "generateCubeUVSize");
function WebGLProgram(renderer, cacheKey, parameters, bindingStates) {
  const gl = renderer.getContext();
  const defines = parameters.defines;
  let vertexShader = parameters.vertexShader;
  let fragmentShader = parameters.fragmentShader;
  const shadowMapTypeDefine = generateShadowMapTypeDefine(parameters);
  const envMapTypeDefine = generateEnvMapTypeDefine(parameters);
  const envMapModeDefine = generateEnvMapModeDefine(parameters);
  const envMapBlendingDefine = generateEnvMapBlendingDefine(parameters);
  const envMapCubeUVSize = generateCubeUVSize(parameters);
  const customVertexExtensions = generateVertexExtensions(parameters);
  const customDefines = generateDefines(defines);
  const program = gl.createProgram();
  let prefixVertex, prefixFragment;
  let versionString = parameters.glslVersion ? "#version " + parameters.glslVersion + "\n" : "";
  if (parameters.isRawShaderMaterial) {
    prefixVertex = [
      "#define SHADER_TYPE " + parameters.shaderType,
      "#define SHADER_NAME " + parameters.shaderName,
      customDefines
    ].filter(filterEmptyLine).join("\n");
    if (prefixVertex.length > 0) {
      prefixVertex += "\n";
    }
    prefixFragment = [
      "#define SHADER_TYPE " + parameters.shaderType,
      "#define SHADER_NAME " + parameters.shaderName,
      customDefines
    ].filter(filterEmptyLine).join("\n");
    if (prefixFragment.length > 0) {
      prefixFragment += "\n";
    }
  } else {
    prefixVertex = [
      generatePrecision(parameters),
      "#define SHADER_TYPE " + parameters.shaderType,
      "#define SHADER_NAME " + parameters.shaderName,
      customDefines,
      parameters.extensionClipCullDistance ? "#define USE_CLIP_DISTANCE" : "",
      parameters.batching ? "#define USE_BATCHING" : "",
      parameters.batchingColor ? "#define USE_BATCHING_COLOR" : "",
      parameters.instancing ? "#define USE_INSTANCING" : "",
      parameters.instancingColor ? "#define USE_INSTANCING_COLOR" : "",
      parameters.instancingMorph ? "#define USE_INSTANCING_MORPH" : "",
      parameters.useFog && parameters.fog ? "#define USE_FOG" : "",
      parameters.useFog && parameters.fogExp2 ? "#define FOG_EXP2" : "",
      parameters.map ? "#define USE_MAP" : "",
      parameters.envMap ? "#define USE_ENVMAP" : "",
      parameters.envMap ? "#define " + envMapModeDefine : "",
      parameters.lightMap ? "#define USE_LIGHTMAP" : "",
      parameters.aoMap ? "#define USE_AOMAP" : "",
      parameters.bumpMap ? "#define USE_BUMPMAP" : "",
      parameters.normalMap ? "#define USE_NORMALMAP" : "",
      parameters.normalMapObjectSpace ? "#define USE_NORMALMAP_OBJECTSPACE" : "",
      parameters.normalMapTangentSpace ? "#define USE_NORMALMAP_TANGENTSPACE" : "",
      parameters.displacementMap ? "#define USE_DISPLACEMENTMAP" : "",
      parameters.emissiveMap ? "#define USE_EMISSIVEMAP" : "",
      parameters.anisotropy ? "#define USE_ANISOTROPY" : "",
      parameters.anisotropyMap ? "#define USE_ANISOTROPYMAP" : "",
      parameters.clearcoatMap ? "#define USE_CLEARCOATMAP" : "",
      parameters.clearcoatRoughnessMap ? "#define USE_CLEARCOAT_ROUGHNESSMAP" : "",
      parameters.clearcoatNormalMap ? "#define USE_CLEARCOAT_NORMALMAP" : "",
      parameters.iridescenceMap ? "#define USE_IRIDESCENCEMAP" : "",
      parameters.iridescenceThicknessMap ? "#define USE_IRIDESCENCE_THICKNESSMAP" : "",
      parameters.specularMap ? "#define USE_SPECULARMAP" : "",
      parameters.specularColorMap ? "#define USE_SPECULAR_COLORMAP" : "",
      parameters.specularIntensityMap ? "#define USE_SPECULAR_INTENSITYMAP" : "",
      parameters.roughnessMap ? "#define USE_ROUGHNESSMAP" : "",
      parameters.metalnessMap ? "#define USE_METALNESSMAP" : "",
      parameters.alphaMap ? "#define USE_ALPHAMAP" : "",
      parameters.alphaHash ? "#define USE_ALPHAHASH" : "",
      parameters.transmission ? "#define USE_TRANSMISSION" : "",
      parameters.transmissionMap ? "#define USE_TRANSMISSIONMAP" : "",
      parameters.thicknessMap ? "#define USE_THICKNESSMAP" : "",
      parameters.sheenColorMap ? "#define USE_SHEEN_COLORMAP" : "",
      parameters.sheenRoughnessMap ? "#define USE_SHEEN_ROUGHNESSMAP" : "",
      //
      parameters.mapUv ? "#define MAP_UV " + parameters.mapUv : "",
      parameters.alphaMapUv ? "#define ALPHAMAP_UV " + parameters.alphaMapUv : "",
      parameters.lightMapUv ? "#define LIGHTMAP_UV " + parameters.lightMapUv : "",
      parameters.aoMapUv ? "#define AOMAP_UV " + parameters.aoMapUv : "",
      parameters.emissiveMapUv ? "#define EMISSIVEMAP_UV " + parameters.emissiveMapUv : "",
      parameters.bumpMapUv ? "#define BUMPMAP_UV " + parameters.bumpMapUv : "",
      parameters.normalMapUv ? "#define NORMALMAP_UV " + parameters.normalMapUv : "",
      parameters.displacementMapUv ? "#define DISPLACEMENTMAP_UV " + parameters.displacementMapUv : "",
      parameters.metalnessMapUv ? "#define METALNESSMAP_UV " + parameters.metalnessMapUv : "",
      parameters.roughnessMapUv ? "#define ROUGHNESSMAP_UV " + parameters.roughnessMapUv : "",
      parameters.anisotropyMapUv ? "#define ANISOTROPYMAP_UV " + parameters.anisotropyMapUv : "",
      parameters.clearcoatMapUv ? "#define CLEARCOATMAP_UV " + parameters.clearcoatMapUv : "",
      parameters.clearcoatNormalMapUv ? "#define CLEARCOAT_NORMALMAP_UV " + parameters.clearcoatNormalMapUv : "",
      parameters.clearcoatRoughnessMapUv ? "#define CLEARCOAT_ROUGHNESSMAP_UV " + parameters.clearcoatRoughnessMapUv : "",
      parameters.iridescenceMapUv ? "#define IRIDESCENCEMAP_UV " + parameters.iridescenceMapUv : "",
      parameters.iridescenceThicknessMapUv ? "#define IRIDESCENCE_THICKNESSMAP_UV " + parameters.iridescenceThicknessMapUv : "",
      parameters.sheenColorMapUv ? "#define SHEEN_COLORMAP_UV " + parameters.sheenColorMapUv : "",
      parameters.sheenRoughnessMapUv ? "#define SHEEN_ROUGHNESSMAP_UV " + parameters.sheenRoughnessMapUv : "",
      parameters.specularMapUv ? "#define SPECULARMAP_UV " + parameters.specularMapUv : "",
      parameters.specularColorMapUv ? "#define SPECULAR_COLORMAP_UV " + parameters.specularColorMapUv : "",
      parameters.specularIntensityMapUv ? "#define SPECULAR_INTENSITYMAP_UV " + parameters.specularIntensityMapUv : "",
      parameters.transmissionMapUv ? "#define TRANSMISSIONMAP_UV " + parameters.transmissionMapUv : "",
      parameters.thicknessMapUv ? "#define THICKNESSMAP_UV " + parameters.thicknessMapUv : "",
      //
      parameters.vertexTangents && parameters.flatShading === false ? "#define USE_TANGENT" : "",
      parameters.vertexColors ? "#define USE_COLOR" : "",
      parameters.vertexAlphas ? "#define USE_COLOR_ALPHA" : "",
      parameters.vertexUv1s ? "#define USE_UV1" : "",
      parameters.vertexUv2s ? "#define USE_UV2" : "",
      parameters.vertexUv3s ? "#define USE_UV3" : "",
      parameters.pointsUvs ? "#define USE_POINTS_UV" : "",
      parameters.flatShading ? "#define FLAT_SHADED" : "",
      parameters.skinning ? "#define USE_SKINNING" : "",
      parameters.morphTargets ? "#define USE_MORPHTARGETS" : "",
      parameters.morphNormals && parameters.flatShading === false ? "#define USE_MORPHNORMALS" : "",
      parameters.morphColors ? "#define USE_MORPHCOLORS" : "",
      parameters.morphTargetsCount > 0 ? "#define MORPHTARGETS_TEXTURE_STRIDE " + parameters.morphTextureStride : "",
      parameters.morphTargetsCount > 0 ? "#define MORPHTARGETS_COUNT " + parameters.morphTargetsCount : "",
      parameters.doubleSided ? "#define DOUBLE_SIDED" : "",
      parameters.flipSided ? "#define FLIP_SIDED" : "",
      parameters.shadowMapEnabled ? "#define USE_SHADOWMAP" : "",
      parameters.shadowMapEnabled ? "#define " + shadowMapTypeDefine : "",
      parameters.sizeAttenuation ? "#define USE_SIZEATTENUATION" : "",
      parameters.numLightProbes > 0 ? "#define USE_LIGHT_PROBES" : "",
      parameters.logarithmicDepthBuffer ? "#define USE_LOGDEPTHBUF" : "",
      parameters.reverseDepthBuffer ? "#define USE_REVERSEDEPTHBUF" : "",
      "uniform mat4 modelMatrix;",
      "uniform mat4 modelViewMatrix;",
      "uniform mat4 projectionMatrix;",
      "uniform mat4 viewMatrix;",
      "uniform mat3 normalMatrix;",
      "uniform vec3 cameraPosition;",
      "uniform bool isOrthographic;",
      "#ifdef USE_INSTANCING",
      "	attribute mat4 instanceMatrix;",
      "#endif",
      "#ifdef USE_INSTANCING_COLOR",
      "	attribute vec3 instanceColor;",
      "#endif",
      "#ifdef USE_INSTANCING_MORPH",
      "	uniform sampler2D morphTexture;",
      "#endif",
      "attribute vec3 position;",
      "attribute vec3 normal;",
      "attribute vec2 uv;",
      "#ifdef USE_UV1",
      "	attribute vec2 uv1;",
      "#endif",
      "#ifdef USE_UV2",
      "	attribute vec2 uv2;",
      "#endif",
      "#ifdef USE_UV3",
      "	attribute vec2 uv3;",
      "#endif",
      "#ifdef USE_TANGENT",
      "	attribute vec4 tangent;",
      "#endif",
      "#if defined( USE_COLOR_ALPHA )",
      "	attribute vec4 color;",
      "#elif defined( USE_COLOR )",
      "	attribute vec3 color;",
      "#endif",
      "#ifdef USE_SKINNING",
      "	attribute vec4 skinIndex;",
      "	attribute vec4 skinWeight;",
      "#endif",
      "\n"
    ].filter(filterEmptyLine).join("\n");
    prefixFragment = [
      generatePrecision(parameters),
      "#define SHADER_TYPE " + parameters.shaderType,
      "#define SHADER_NAME " + parameters.shaderName,
      customDefines,
      parameters.useFog && parameters.fog ? "#define USE_FOG" : "",
      parameters.useFog && parameters.fogExp2 ? "#define FOG_EXP2" : "",
      parameters.alphaToCoverage ? "#define ALPHA_TO_COVERAGE" : "",
      parameters.map ? "#define USE_MAP" : "",
      parameters.matcap ? "#define USE_MATCAP" : "",
      parameters.envMap ? "#define USE_ENVMAP" : "",
      parameters.envMap ? "#define " + envMapTypeDefine : "",
      parameters.envMap ? "#define " + envMapModeDefine : "",
      parameters.envMap ? "#define " + envMapBlendingDefine : "",
      envMapCubeUVSize ? "#define CUBEUV_TEXEL_WIDTH " + envMapCubeUVSize.texelWidth : "",
      envMapCubeUVSize ? "#define CUBEUV_TEXEL_HEIGHT " + envMapCubeUVSize.texelHeight : "",
      envMapCubeUVSize ? "#define CUBEUV_MAX_MIP " + envMapCubeUVSize.maxMip + ".0" : "",
      parameters.lightMap ? "#define USE_LIGHTMAP" : "",
      parameters.aoMap ? "#define USE_AOMAP" : "",
      parameters.bumpMap ? "#define USE_BUMPMAP" : "",
      parameters.normalMap ? "#define USE_NORMALMAP" : "",
      parameters.normalMapObjectSpace ? "#define USE_NORMALMAP_OBJECTSPACE" : "",
      parameters.normalMapTangentSpace ? "#define USE_NORMALMAP_TANGENTSPACE" : "",
      parameters.emissiveMap ? "#define USE_EMISSIVEMAP" : "",
      parameters.anisotropy ? "#define USE_ANISOTROPY" : "",
      parameters.anisotropyMap ? "#define USE_ANISOTROPYMAP" : "",
      parameters.clearcoat ? "#define USE_CLEARCOAT" : "",
      parameters.clearcoatMap ? "#define USE_CLEARCOATMAP" : "",
      parameters.clearcoatRoughnessMap ? "#define USE_CLEARCOAT_ROUGHNESSMAP" : "",
      parameters.clearcoatNormalMap ? "#define USE_CLEARCOAT_NORMALMAP" : "",
      parameters.dispersion ? "#define USE_DISPERSION" : "",
      parameters.iridescence ? "#define USE_IRIDESCENCE" : "",
      parameters.iridescenceMap ? "#define USE_IRIDESCENCEMAP" : "",
      parameters.iridescenceThicknessMap ? "#define USE_IRIDESCENCE_THICKNESSMAP" : "",
      parameters.specularMap ? "#define USE_SPECULARMAP" : "",
      parameters.specularColorMap ? "#define USE_SPECULAR_COLORMAP" : "",
      parameters.specularIntensityMap ? "#define USE_SPECULAR_INTENSITYMAP" : "",
      parameters.roughnessMap ? "#define USE_ROUGHNESSMAP" : "",
      parameters.metalnessMap ? "#define USE_METALNESSMAP" : "",
      parameters.alphaMap ? "#define USE_ALPHAMAP" : "",
      parameters.alphaTest ? "#define USE_ALPHATEST" : "",
      parameters.alphaHash ? "#define USE_ALPHAHASH" : "",
      parameters.sheen ? "#define USE_SHEEN" : "",
      parameters.sheenColorMap ? "#define USE_SHEEN_COLORMAP" : "",
      parameters.sheenRoughnessMap ? "#define USE_SHEEN_ROUGHNESSMAP" : "",
      parameters.transmission ? "#define USE_TRANSMISSION" : "",
      parameters.transmissionMap ? "#define USE_TRANSMISSIONMAP" : "",
      parameters.thicknessMap ? "#define USE_THICKNESSMAP" : "",
      parameters.vertexTangents && parameters.flatShading === false ? "#define USE_TANGENT" : "",
      parameters.vertexColors || parameters.instancingColor || parameters.batchingColor ? "#define USE_COLOR" : "",
      parameters.vertexAlphas ? "#define USE_COLOR_ALPHA" : "",
      parameters.vertexUv1s ? "#define USE_UV1" : "",
      parameters.vertexUv2s ? "#define USE_UV2" : "",
      parameters.vertexUv3s ? "#define USE_UV3" : "",
      parameters.pointsUvs ? "#define USE_POINTS_UV" : "",
      parameters.gradientMap ? "#define USE_GRADIENTMAP" : "",
      parameters.flatShading ? "#define FLAT_SHADED" : "",
      parameters.doubleSided ? "#define DOUBLE_SIDED" : "",
      parameters.flipSided ? "#define FLIP_SIDED" : "",
      parameters.shadowMapEnabled ? "#define USE_SHADOWMAP" : "",
      parameters.shadowMapEnabled ? "#define " + shadowMapTypeDefine : "",
      parameters.premultipliedAlpha ? "#define PREMULTIPLIED_ALPHA" : "",
      parameters.numLightProbes > 0 ? "#define USE_LIGHT_PROBES" : "",
      parameters.decodeVideoTexture ? "#define DECODE_VIDEO_TEXTURE" : "",
      parameters.decodeVideoTextureEmissive ? "#define DECODE_VIDEO_TEXTURE_EMISSIVE" : "",
      parameters.logarithmicDepthBuffer ? "#define USE_LOGDEPTHBUF" : "",
      parameters.reverseDepthBuffer ? "#define USE_REVERSEDEPTHBUF" : "",
      "uniform mat4 viewMatrix;",
      "uniform vec3 cameraPosition;",
      "uniform bool isOrthographic;",
      parameters.toneMapping !== NoToneMapping ? "#define TONE_MAPPING" : "",
      parameters.toneMapping !== NoToneMapping ? ShaderChunk["tonemapping_pars_fragment"] : "",
      // this code is required here because it is used by the toneMapping() function defined below
      parameters.toneMapping !== NoToneMapping ? getToneMappingFunction("toneMapping", parameters.toneMapping) : "",
      parameters.dithering ? "#define DITHERING" : "",
      parameters.opaque ? "#define OPAQUE" : "",
      ShaderChunk["colorspace_pars_fragment"],
      // this code is required here because it is used by the various encoding/decoding function defined below
      getTexelEncodingFunction("linearToOutputTexel", parameters.outputColorSpace),
      getLuminanceFunction(),
      parameters.useDepthPacking ? "#define DEPTH_PACKING " + parameters.depthPacking : "",
      "\n"
    ].filter(filterEmptyLine).join("\n");
  }
  vertexShader = resolveIncludes(vertexShader);
  vertexShader = replaceLightNums(vertexShader, parameters);
  vertexShader = replaceClippingPlaneNums(vertexShader, parameters);
  fragmentShader = resolveIncludes(fragmentShader);
  fragmentShader = replaceLightNums(fragmentShader, parameters);
  fragmentShader = replaceClippingPlaneNums(fragmentShader, parameters);
  vertexShader = unrollLoops(vertexShader);
  fragmentShader = unrollLoops(fragmentShader);
  if (parameters.isRawShaderMaterial !== true) {
    versionString = "#version 300 es\n";
    prefixVertex = [
      customVertexExtensions,
      "#define attribute in",
      "#define varying out",
      "#define texture2D texture"
    ].join("\n") + "\n" + prefixVertex;
    prefixFragment = [
      "#define varying in",
      parameters.glslVersion === GLSL3 ? "" : "layout(location = 0) out highp vec4 pc_fragColor;",
      parameters.glslVersion === GLSL3 ? "" : "#define gl_FragColor pc_fragColor",
      "#define gl_FragDepthEXT gl_FragDepth",
      "#define texture2D texture",
      "#define textureCube texture",
      "#define texture2DProj textureProj",
      "#define texture2DLodEXT textureLod",
      "#define texture2DProjLodEXT textureProjLod",
      "#define textureCubeLodEXT textureLod",
      "#define texture2DGradEXT textureGrad",
      "#define texture2DProjGradEXT textureProjGrad",
      "#define textureCubeGradEXT textureGrad"
    ].join("\n") + "\n" + prefixFragment;
  }
  const vertexGlsl = versionString + prefixVertex + vertexShader;
  const fragmentGlsl = versionString + prefixFragment + fragmentShader;
  const glVertexShader = WebGLShader(gl, gl.VERTEX_SHADER, vertexGlsl);
  const glFragmentShader = WebGLShader(gl, gl.FRAGMENT_SHADER, fragmentGlsl);
  gl.attachShader(program, glVertexShader);
  gl.attachShader(program, glFragmentShader);
  if (parameters.index0AttributeName !== void 0) {
    gl.bindAttribLocation(program, 0, parameters.index0AttributeName);
  } else if (parameters.morphTargets === true) {
    gl.bindAttribLocation(program, 0, "position");
  }
  gl.linkProgram(program);
  function onFirstUse(self2) {
    if (renderer.debug.checkShaderErrors) {
      const programLog = gl.getProgramInfoLog(program).trim();
      const vertexLog = gl.getShaderInfoLog(glVertexShader).trim();
      const fragmentLog = gl.getShaderInfoLog(glFragmentShader).trim();
      let runnable = true;
      let haveDiagnostics = true;
      if (gl.getProgramParameter(program, gl.LINK_STATUS) === false) {
        runnable = false;
        if (typeof renderer.debug.onShaderError === "function") {
          renderer.debug.onShaderError(gl, program, glVertexShader, glFragmentShader);
        } else {
          const vertexErrors = getShaderErrors(gl, glVertexShader, "vertex");
          const fragmentErrors = getShaderErrors(gl, glFragmentShader, "fragment");
          console.error(
            "THREE.WebGLProgram: Shader Error " + gl.getError() + " - VALIDATE_STATUS " + gl.getProgramParameter(program, gl.VALIDATE_STATUS) + "\n\nMaterial Name: " + self2.name + "\nMaterial Type: " + self2.type + "\n\nProgram Info Log: " + programLog + "\n" + vertexErrors + "\n" + fragmentErrors
          );
        }
      } else if (programLog !== "") {
        console.warn("THREE.WebGLProgram: Program Info Log:", programLog);
      } else if (vertexLog === "" || fragmentLog === "") {
        haveDiagnostics = false;
      }
      if (haveDiagnostics) {
        self2.diagnostics = {
          runnable,
          programLog,
          vertexShader: {
            log: vertexLog,
            prefix: prefixVertex
          },
          fragmentShader: {
            log: fragmentLog,
            prefix: prefixFragment
          }
        };
      }
    }
    gl.deleteShader(glVertexShader);
    gl.deleteShader(glFragmentShader);
    cachedUniforms = new WebGLUniforms(gl, program);
    cachedAttributes = fetchAttributeLocations(gl, program);
  }
  __name(onFirstUse, "onFirstUse");
  let cachedUniforms;
  this.getUniforms = function() {
    if (cachedUniforms === void 0) {
      onFirstUse(this);
    }
    return cachedUniforms;
  };
  let cachedAttributes;
  this.getAttributes = function() {
    if (cachedAttributes === void 0) {
      onFirstUse(this);
    }
    return cachedAttributes;
  };
  let programReady = parameters.rendererExtensionParallelShaderCompile === false;
  this.isReady = function() {
    if (programReady === false) {
      programReady = gl.getProgramParameter(program, COMPLETION_STATUS_KHR);
    }
    return programReady;
  };
  this.destroy = function() {
    bindingStates.releaseStatesOfProgram(this);
    gl.deleteProgram(program);
    this.program = void 0;
  };
  this.type = parameters.shaderType;
  this.name = parameters.shaderName;
  this.id = programIdCount++;
  this.cacheKey = cacheKey;
  this.usedTimes = 1;
  this.program = program;
  this.vertexShader = glVertexShader;
  this.fragmentShader = glFragmentShader;
  return this;
}
__name(WebGLProgram, "WebGLProgram");
let _id$1 = 0;
class WebGLShaderCache {
  static {
    __name(this, "WebGLShaderCache");
  }
  constructor() {
    this.shaderCache = /* @__PURE__ */ new Map();
    this.materialCache = /* @__PURE__ */ new Map();
  }
  update(material) {
    const vertexShader = material.vertexShader;
    const fragmentShader = material.fragmentShader;
    const vertexShaderStage = this._getShaderStage(vertexShader);
    const fragmentShaderStage = this._getShaderStage(fragmentShader);
    const materialShaders = this._getShaderCacheForMaterial(material);
    if (materialShaders.has(vertexShaderStage) === false) {
      materialShaders.add(vertexShaderStage);
      vertexShaderStage.usedTimes++;
    }
    if (materialShaders.has(fragmentShaderStage) === false) {
      materialShaders.add(fragmentShaderStage);
      fragmentShaderStage.usedTimes++;
    }
    return this;
  }
  remove(material) {
    const materialShaders = this.materialCache.get(material);
    for (const shaderStage of materialShaders) {
      shaderStage.usedTimes--;
      if (shaderStage.usedTimes === 0) this.shaderCache.delete(shaderStage.code);
    }
    this.materialCache.delete(material);
    return this;
  }
  getVertexShaderID(material) {
    return this._getShaderStage(material.vertexShader).id;
  }
  getFragmentShaderID(material) {
    return this._getShaderStage(material.fragmentShader).id;
  }
  dispose() {
    this.shaderCache.clear();
    this.materialCache.clear();
  }
  _getShaderCacheForMaterial(material) {
    const cache = this.materialCache;
    let set = cache.get(material);
    if (set === void 0) {
      set = /* @__PURE__ */ new Set();
      cache.set(material, set);
    }
    return set;
  }
  _getShaderStage(code) {
    const cache = this.shaderCache;
    let stage = cache.get(code);
    if (stage === void 0) {
      stage = new WebGLShaderStage(code);
      cache.set(code, stage);
    }
    return stage;
  }
}
class WebGLShaderStage {
  static {
    __name(this, "WebGLShaderStage");
  }
  constructor(code) {
    this.id = _id$1++;
    this.code = code;
    this.usedTimes = 0;
  }
}
function WebGLPrograms(renderer, cubemaps, cubeuvmaps, extensions, capabilities, bindingStates, clipping) {
  const _programLayers = new Layers();
  const _customShaders = new WebGLShaderCache();
  const _activeChannels = /* @__PURE__ */ new Set();
  const programs = [];
  const logarithmicDepthBuffer = capabilities.logarithmicDepthBuffer;
  const SUPPORTS_VERTEX_TEXTURES = capabilities.vertexTextures;
  let precision = capabilities.precision;
  const shaderIDs = {
    MeshDepthMaterial: "depth",
    MeshDistanceMaterial: "distanceRGBA",
    MeshNormalMaterial: "normal",
    MeshBasicMaterial: "basic",
    MeshLambertMaterial: "lambert",
    MeshPhongMaterial: "phong",
    MeshToonMaterial: "toon",
    MeshStandardMaterial: "physical",
    MeshPhysicalMaterial: "physical",
    MeshMatcapMaterial: "matcap",
    LineBasicMaterial: "basic",
    LineDashedMaterial: "dashed",
    PointsMaterial: "points",
    ShadowMaterial: "shadow",
    SpriteMaterial: "sprite"
  };
  function getChannel(value) {
    _activeChannels.add(value);
    if (value === 0) return "uv";
    return `uv${value}`;
  }
  __name(getChannel, "getChannel");
  function getParameters(material, lights, shadows, scene, object) {
    const fog = scene.fog;
    const geometry = object.geometry;
    const environment = material.isMeshStandardMaterial ? scene.environment : null;
    const envMap = (material.isMeshStandardMaterial ? cubeuvmaps : cubemaps).get(material.envMap || environment);
    const envMapCubeUVHeight = !!envMap && envMap.mapping === CubeUVReflectionMapping ? envMap.image.height : null;
    const shaderID = shaderIDs[material.type];
    if (material.precision !== null) {
      precision = capabilities.getMaxPrecision(material.precision);
      if (precision !== material.precision) {
        console.warn("THREE.WebGLProgram.getParameters:", material.precision, "not supported, using", precision, "instead.");
      }
    }
    const morphAttribute = geometry.morphAttributes.position || geometry.morphAttributes.normal || geometry.morphAttributes.color;
    const morphTargetsCount = morphAttribute !== void 0 ? morphAttribute.length : 0;
    let morphTextureStride = 0;
    if (geometry.morphAttributes.position !== void 0) morphTextureStride = 1;
    if (geometry.morphAttributes.normal !== void 0) morphTextureStride = 2;
    if (geometry.morphAttributes.color !== void 0) morphTextureStride = 3;
    let vertexShader, fragmentShader;
    let customVertexShaderID, customFragmentShaderID;
    if (shaderID) {
      const shader = ShaderLib[shaderID];
      vertexShader = shader.vertexShader;
      fragmentShader = shader.fragmentShader;
    } else {
      vertexShader = material.vertexShader;
      fragmentShader = material.fragmentShader;
      _customShaders.update(material);
      customVertexShaderID = _customShaders.getVertexShaderID(material);
      customFragmentShaderID = _customShaders.getFragmentShaderID(material);
    }
    const currentRenderTarget = renderer.getRenderTarget();
    const reverseDepthBuffer = renderer.state.buffers.depth.getReversed();
    const IS_INSTANCEDMESH = object.isInstancedMesh === true;
    const IS_BATCHEDMESH = object.isBatchedMesh === true;
    const HAS_MAP = !!material.map;
    const HAS_MATCAP = !!material.matcap;
    const HAS_ENVMAP = !!envMap;
    const HAS_AOMAP = !!material.aoMap;
    const HAS_LIGHTMAP = !!material.lightMap;
    const HAS_BUMPMAP = !!material.bumpMap;
    const HAS_NORMALMAP = !!material.normalMap;
    const HAS_DISPLACEMENTMAP = !!material.displacementMap;
    const HAS_EMISSIVEMAP = !!material.emissiveMap;
    const HAS_METALNESSMAP = !!material.metalnessMap;
    const HAS_ROUGHNESSMAP = !!material.roughnessMap;
    const HAS_ANISOTROPY = material.anisotropy > 0;
    const HAS_CLEARCOAT = material.clearcoat > 0;
    const HAS_DISPERSION = material.dispersion > 0;
    const HAS_IRIDESCENCE = material.iridescence > 0;
    const HAS_SHEEN = material.sheen > 0;
    const HAS_TRANSMISSION = material.transmission > 0;
    const HAS_ANISOTROPYMAP = HAS_ANISOTROPY && !!material.anisotropyMap;
    const HAS_CLEARCOATMAP = HAS_CLEARCOAT && !!material.clearcoatMap;
    const HAS_CLEARCOAT_NORMALMAP = HAS_CLEARCOAT && !!material.clearcoatNormalMap;
    const HAS_CLEARCOAT_ROUGHNESSMAP = HAS_CLEARCOAT && !!material.clearcoatRoughnessMap;
    const HAS_IRIDESCENCEMAP = HAS_IRIDESCENCE && !!material.iridescenceMap;
    const HAS_IRIDESCENCE_THICKNESSMAP = HAS_IRIDESCENCE && !!material.iridescenceThicknessMap;
    const HAS_SHEEN_COLORMAP = HAS_SHEEN && !!material.sheenColorMap;
    const HAS_SHEEN_ROUGHNESSMAP = HAS_SHEEN && !!material.sheenRoughnessMap;
    const HAS_SPECULARMAP = !!material.specularMap;
    const HAS_SPECULAR_COLORMAP = !!material.specularColorMap;
    const HAS_SPECULAR_INTENSITYMAP = !!material.specularIntensityMap;
    const HAS_TRANSMISSIONMAP = HAS_TRANSMISSION && !!material.transmissionMap;
    const HAS_THICKNESSMAP = HAS_TRANSMISSION && !!material.thicknessMap;
    const HAS_GRADIENTMAP = !!material.gradientMap;
    const HAS_ALPHAMAP = !!material.alphaMap;
    const HAS_ALPHATEST = material.alphaTest > 0;
    const HAS_ALPHAHASH = !!material.alphaHash;
    const HAS_EXTENSIONS = !!material.extensions;
    let toneMapping = NoToneMapping;
    if (material.toneMapped) {
      if (currentRenderTarget === null || currentRenderTarget.isXRRenderTarget === true) {
        toneMapping = renderer.toneMapping;
      }
    }
    const parameters = {
      shaderID,
      shaderType: material.type,
      shaderName: material.name,
      vertexShader,
      fragmentShader,
      defines: material.defines,
      customVertexShaderID,
      customFragmentShaderID,
      isRawShaderMaterial: material.isRawShaderMaterial === true,
      glslVersion: material.glslVersion,
      precision,
      batching: IS_BATCHEDMESH,
      batchingColor: IS_BATCHEDMESH && object._colorsTexture !== null,
      instancing: IS_INSTANCEDMESH,
      instancingColor: IS_INSTANCEDMESH && object.instanceColor !== null,
      instancingMorph: IS_INSTANCEDMESH && object.morphTexture !== null,
      supportsVertexTextures: SUPPORTS_VERTEX_TEXTURES,
      outputColorSpace: currentRenderTarget === null ? renderer.outputColorSpace : currentRenderTarget.isXRRenderTarget === true ? currentRenderTarget.texture.colorSpace : LinearSRGBColorSpace,
      alphaToCoverage: !!material.alphaToCoverage,
      map: HAS_MAP,
      matcap: HAS_MATCAP,
      envMap: HAS_ENVMAP,
      envMapMode: HAS_ENVMAP && envMap.mapping,
      envMapCubeUVHeight,
      aoMap: HAS_AOMAP,
      lightMap: HAS_LIGHTMAP,
      bumpMap: HAS_BUMPMAP,
      normalMap: HAS_NORMALMAP,
      displacementMap: SUPPORTS_VERTEX_TEXTURES && HAS_DISPLACEMENTMAP,
      emissiveMap: HAS_EMISSIVEMAP,
      normalMapObjectSpace: HAS_NORMALMAP && material.normalMapType === ObjectSpaceNormalMap,
      normalMapTangentSpace: HAS_NORMALMAP && material.normalMapType === TangentSpaceNormalMap,
      metalnessMap: HAS_METALNESSMAP,
      roughnessMap: HAS_ROUGHNESSMAP,
      anisotropy: HAS_ANISOTROPY,
      anisotropyMap: HAS_ANISOTROPYMAP,
      clearcoat: HAS_CLEARCOAT,
      clearcoatMap: HAS_CLEARCOATMAP,
      clearcoatNormalMap: HAS_CLEARCOAT_NORMALMAP,
      clearcoatRoughnessMap: HAS_CLEARCOAT_ROUGHNESSMAP,
      dispersion: HAS_DISPERSION,
      iridescence: HAS_IRIDESCENCE,
      iridescenceMap: HAS_IRIDESCENCEMAP,
      iridescenceThicknessMap: HAS_IRIDESCENCE_THICKNESSMAP,
      sheen: HAS_SHEEN,
      sheenColorMap: HAS_SHEEN_COLORMAP,
      sheenRoughnessMap: HAS_SHEEN_ROUGHNESSMAP,
      specularMap: HAS_SPECULARMAP,
      specularColorMap: HAS_SPECULAR_COLORMAP,
      specularIntensityMap: HAS_SPECULAR_INTENSITYMAP,
      transmission: HAS_TRANSMISSION,
      transmissionMap: HAS_TRANSMISSIONMAP,
      thicknessMap: HAS_THICKNESSMAP,
      gradientMap: HAS_GRADIENTMAP,
      opaque: material.transparent === false && material.blending === NormalBlending && material.alphaToCoverage === false,
      alphaMap: HAS_ALPHAMAP,
      alphaTest: HAS_ALPHATEST,
      alphaHash: HAS_ALPHAHASH,
      combine: material.combine,
      //
      mapUv: HAS_MAP && getChannel(material.map.channel),
      aoMapUv: HAS_AOMAP && getChannel(material.aoMap.channel),
      lightMapUv: HAS_LIGHTMAP && getChannel(material.lightMap.channel),
      bumpMapUv: HAS_BUMPMAP && getChannel(material.bumpMap.channel),
      normalMapUv: HAS_NORMALMAP && getChannel(material.normalMap.channel),
      displacementMapUv: HAS_DISPLACEMENTMAP && getChannel(material.displacementMap.channel),
      emissiveMapUv: HAS_EMISSIVEMAP && getChannel(material.emissiveMap.channel),
      metalnessMapUv: HAS_METALNESSMAP && getChannel(material.metalnessMap.channel),
      roughnessMapUv: HAS_ROUGHNESSMAP && getChannel(material.roughnessMap.channel),
      anisotropyMapUv: HAS_ANISOTROPYMAP && getChannel(material.anisotropyMap.channel),
      clearcoatMapUv: HAS_CLEARCOATMAP && getChannel(material.clearcoatMap.channel),
      clearcoatNormalMapUv: HAS_CLEARCOAT_NORMALMAP && getChannel(material.clearcoatNormalMap.channel),
      clearcoatRoughnessMapUv: HAS_CLEARCOAT_ROUGHNESSMAP && getChannel(material.clearcoatRoughnessMap.channel),
      iridescenceMapUv: HAS_IRIDESCENCEMAP && getChannel(material.iridescenceMap.channel),
      iridescenceThicknessMapUv: HAS_IRIDESCENCE_THICKNESSMAP && getChannel(material.iridescenceThicknessMap.channel),
      sheenColorMapUv: HAS_SHEEN_COLORMAP && getChannel(material.sheenColorMap.channel),
      sheenRoughnessMapUv: HAS_SHEEN_ROUGHNESSMAP && getChannel(material.sheenRoughnessMap.channel),
      specularMapUv: HAS_SPECULARMAP && getChannel(material.specularMap.channel),
      specularColorMapUv: HAS_SPECULAR_COLORMAP && getChannel(material.specularColorMap.channel),
      specularIntensityMapUv: HAS_SPECULAR_INTENSITYMAP && getChannel(material.specularIntensityMap.channel),
      transmissionMapUv: HAS_TRANSMISSIONMAP && getChannel(material.transmissionMap.channel),
      thicknessMapUv: HAS_THICKNESSMAP && getChannel(material.thicknessMap.channel),
      alphaMapUv: HAS_ALPHAMAP && getChannel(material.alphaMap.channel),
      //
      vertexTangents: !!geometry.attributes.tangent && (HAS_NORMALMAP || HAS_ANISOTROPY),
      vertexColors: material.vertexColors,
      vertexAlphas: material.vertexColors === true && !!geometry.attributes.color && geometry.attributes.color.itemSize === 4,
      pointsUvs: object.isPoints === true && !!geometry.attributes.uv && (HAS_MAP || HAS_ALPHAMAP),
      fog: !!fog,
      useFog: material.fog === true,
      fogExp2: !!fog && fog.isFogExp2,
      flatShading: material.flatShading === true,
      sizeAttenuation: material.sizeAttenuation === true,
      logarithmicDepthBuffer,
      reverseDepthBuffer,
      skinning: object.isSkinnedMesh === true,
      morphTargets: geometry.morphAttributes.position !== void 0,
      morphNormals: geometry.morphAttributes.normal !== void 0,
      morphColors: geometry.morphAttributes.color !== void 0,
      morphTargetsCount,
      morphTextureStride,
      numDirLights: lights.directional.length,
      numPointLights: lights.point.length,
      numSpotLights: lights.spot.length,
      numSpotLightMaps: lights.spotLightMap.length,
      numRectAreaLights: lights.rectArea.length,
      numHemiLights: lights.hemi.length,
      numDirLightShadows: lights.directionalShadowMap.length,
      numPointLightShadows: lights.pointShadowMap.length,
      numSpotLightShadows: lights.spotShadowMap.length,
      numSpotLightShadowsWithMaps: lights.numSpotLightShadowsWithMaps,
      numLightProbes: lights.numLightProbes,
      numClippingPlanes: clipping.numPlanes,
      numClipIntersection: clipping.numIntersection,
      dithering: material.dithering,
      shadowMapEnabled: renderer.shadowMap.enabled && shadows.length > 0,
      shadowMapType: renderer.shadowMap.type,
      toneMapping,
      decodeVideoTexture: HAS_MAP && material.map.isVideoTexture === true && ColorManagement.getTransfer(material.map.colorSpace) === SRGBTransfer,
      decodeVideoTextureEmissive: HAS_EMISSIVEMAP && material.emissiveMap.isVideoTexture === true && ColorManagement.getTransfer(material.emissiveMap.colorSpace) === SRGBTransfer,
      premultipliedAlpha: material.premultipliedAlpha,
      doubleSided: material.side === DoubleSide,
      flipSided: material.side === BackSide,
      useDepthPacking: material.depthPacking >= 0,
      depthPacking: material.depthPacking || 0,
      index0AttributeName: material.index0AttributeName,
      extensionClipCullDistance: HAS_EXTENSIONS && material.extensions.clipCullDistance === true && extensions.has("WEBGL_clip_cull_distance"),
      extensionMultiDraw: (HAS_EXTENSIONS && material.extensions.multiDraw === true || IS_BATCHEDMESH) && extensions.has("WEBGL_multi_draw"),
      rendererExtensionParallelShaderCompile: extensions.has("KHR_parallel_shader_compile"),
      customProgramCacheKey: material.customProgramCacheKey()
    };
    parameters.vertexUv1s = _activeChannels.has(1);
    parameters.vertexUv2s = _activeChannels.has(2);
    parameters.vertexUv3s = _activeChannels.has(3);
    _activeChannels.clear();
    return parameters;
  }
  __name(getParameters, "getParameters");
  function getProgramCacheKey(parameters) {
    const array = [];
    if (parameters.shaderID) {
      array.push(parameters.shaderID);
    } else {
      array.push(parameters.customVertexShaderID);
      array.push(parameters.customFragmentShaderID);
    }
    if (parameters.defines !== void 0) {
      for (const name in parameters.defines) {
        array.push(name);
        array.push(parameters.defines[name]);
      }
    }
    if (parameters.isRawShaderMaterial === false) {
      getProgramCacheKeyParameters(array, parameters);
      getProgramCacheKeyBooleans(array, parameters);
      array.push(renderer.outputColorSpace);
    }
    array.push(parameters.customProgramCacheKey);
    return array.join();
  }
  __name(getProgramCacheKey, "getProgramCacheKey");
  function getProgramCacheKeyParameters(array, parameters) {
    array.push(parameters.precision);
    array.push(parameters.outputColorSpace);
    array.push(parameters.envMapMode);
    array.push(parameters.envMapCubeUVHeight);
    array.push(parameters.mapUv);
    array.push(parameters.alphaMapUv);
    array.push(parameters.lightMapUv);
    array.push(parameters.aoMapUv);
    array.push(parameters.bumpMapUv);
    array.push(parameters.normalMapUv);
    array.push(parameters.displacementMapUv);
    array.push(parameters.emissiveMapUv);
    array.push(parameters.metalnessMapUv);
    array.push(parameters.roughnessMapUv);
    array.push(parameters.anisotropyMapUv);
    array.push(parameters.clearcoatMapUv);
    array.push(parameters.clearcoatNormalMapUv);
    array.push(parameters.clearcoatRoughnessMapUv);
    array.push(parameters.iridescenceMapUv);
    array.push(parameters.iridescenceThicknessMapUv);
    array.push(parameters.sheenColorMapUv);
    array.push(parameters.sheenRoughnessMapUv);
    array.push(parameters.specularMapUv);
    array.push(parameters.specularColorMapUv);
    array.push(parameters.specularIntensityMapUv);
    array.push(parameters.transmissionMapUv);
    array.push(parameters.thicknessMapUv);
    array.push(parameters.combine);
    array.push(parameters.fogExp2);
    array.push(parameters.sizeAttenuation);
    array.push(parameters.morphTargetsCount);
    array.push(parameters.morphAttributeCount);
    array.push(parameters.numDirLights);
    array.push(parameters.numPointLights);
    array.push(parameters.numSpotLights);
    array.push(parameters.numSpotLightMaps);
    array.push(parameters.numHemiLights);
    array.push(parameters.numRectAreaLights);
    array.push(parameters.numDirLightShadows);
    array.push(parameters.numPointLightShadows);
    array.push(parameters.numSpotLightShadows);
    array.push(parameters.numSpotLightShadowsWithMaps);
    array.push(parameters.numLightProbes);
    array.push(parameters.shadowMapType);
    array.push(parameters.toneMapping);
    array.push(parameters.numClippingPlanes);
    array.push(parameters.numClipIntersection);
    array.push(parameters.depthPacking);
  }
  __name(getProgramCacheKeyParameters, "getProgramCacheKeyParameters");
  function getProgramCacheKeyBooleans(array, parameters) {
    _programLayers.disableAll();
    if (parameters.supportsVertexTextures)
      _programLayers.enable(0);
    if (parameters.instancing)
      _programLayers.enable(1);
    if (parameters.instancingColor)
      _programLayers.enable(2);
    if (parameters.instancingMorph)
      _programLayers.enable(3);
    if (parameters.matcap)
      _programLayers.enable(4);
    if (parameters.envMap)
      _programLayers.enable(5);
    if (parameters.normalMapObjectSpace)
      _programLayers.enable(6);
    if (parameters.normalMapTangentSpace)
      _programLayers.enable(7);
    if (parameters.clearcoat)
      _programLayers.enable(8);
    if (parameters.iridescence)
      _programLayers.enable(9);
    if (parameters.alphaTest)
      _programLayers.enable(10);
    if (parameters.vertexColors)
      _programLayers.enable(11);
    if (parameters.vertexAlphas)
      _programLayers.enable(12);
    if (parameters.vertexUv1s)
      _programLayers.enable(13);
    if (parameters.vertexUv2s)
      _programLayers.enable(14);
    if (parameters.vertexUv3s)
      _programLayers.enable(15);
    if (parameters.vertexTangents)
      _programLayers.enable(16);
    if (parameters.anisotropy)
      _programLayers.enable(17);
    if (parameters.alphaHash)
      _programLayers.enable(18);
    if (parameters.batching)
      _programLayers.enable(19);
    if (parameters.dispersion)
      _programLayers.enable(20);
    if (parameters.batchingColor)
      _programLayers.enable(21);
    array.push(_programLayers.mask);
    _programLayers.disableAll();
    if (parameters.fog)
      _programLayers.enable(0);
    if (parameters.useFog)
      _programLayers.enable(1);
    if (parameters.flatShading)
      _programLayers.enable(2);
    if (parameters.logarithmicDepthBuffer)
      _programLayers.enable(3);
    if (parameters.reverseDepthBuffer)
      _programLayers.enable(4);
    if (parameters.skinning)
      _programLayers.enable(5);
    if (parameters.morphTargets)
      _programLayers.enable(6);
    if (parameters.morphNormals)
      _programLayers.enable(7);
    if (parameters.morphColors)
      _programLayers.enable(8);
    if (parameters.premultipliedAlpha)
      _programLayers.enable(9);
    if (parameters.shadowMapEnabled)
      _programLayers.enable(10);
    if (parameters.doubleSided)
      _programLayers.enable(11);
    if (parameters.flipSided)
      _programLayers.enable(12);
    if (parameters.useDepthPacking)
      _programLayers.enable(13);
    if (parameters.dithering)
      _programLayers.enable(14);
    if (parameters.transmission)
      _programLayers.enable(15);
    if (parameters.sheen)
      _programLayers.enable(16);
    if (parameters.opaque)
      _programLayers.enable(17);
    if (parameters.pointsUvs)
      _programLayers.enable(18);
    if (parameters.decodeVideoTexture)
      _programLayers.enable(19);
    if (parameters.decodeVideoTextureEmissive)
      _programLayers.enable(20);
    if (parameters.alphaToCoverage)
      _programLayers.enable(21);
    array.push(_programLayers.mask);
  }
  __name(getProgramCacheKeyBooleans, "getProgramCacheKeyBooleans");
  function getUniforms(material) {
    const shaderID = shaderIDs[material.type];
    let uniforms;
    if (shaderID) {
      const shader = ShaderLib[shaderID];
      uniforms = UniformsUtils.clone(shader.uniforms);
    } else {
      uniforms = material.uniforms;
    }
    return uniforms;
  }
  __name(getUniforms, "getUniforms");
  function acquireProgram(parameters, cacheKey) {
    let program;
    for (let p = 0, pl = programs.length; p < pl; p++) {
      const preexistingProgram = programs[p];
      if (preexistingProgram.cacheKey === cacheKey) {
        program = preexistingProgram;
        ++program.usedTimes;
        break;
      }
    }
    if (program === void 0) {
      program = new WebGLProgram(renderer, cacheKey, parameters, bindingStates);
      programs.push(program);
    }
    return program;
  }
  __name(acquireProgram, "acquireProgram");
  function releaseProgram(program) {
    if (--program.usedTimes === 0) {
      const i = programs.indexOf(program);
      programs[i] = programs[programs.length - 1];
      programs.pop();
      program.destroy();
    }
  }
  __name(releaseProgram, "releaseProgram");
  function releaseShaderCache(material) {
    _customShaders.remove(material);
  }
  __name(releaseShaderCache, "releaseShaderCache");
  function dispose() {
    _customShaders.dispose();
  }
  __name(dispose, "dispose");
  return {
    getParameters,
    getProgramCacheKey,
    getUniforms,
    acquireProgram,
    releaseProgram,
    releaseShaderCache,
    // Exposed for resource monitoring & error feedback via renderer.info:
    programs,
    dispose
  };
}
__name(WebGLPrograms, "WebGLPrograms");
function WebGLProperties() {
  let properties = /* @__PURE__ */ new WeakMap();
  function has(object) {
    return properties.has(object);
  }
  __name(has, "has");
  function get(object) {
    let map = properties.get(object);
    if (map === void 0) {
      map = {};
      properties.set(object, map);
    }
    return map;
  }
  __name(get, "get");
  function remove(object) {
    properties.delete(object);
  }
  __name(remove, "remove");
  function update(object, key, value) {
    properties.get(object)[key] = value;
  }
  __name(update, "update");
  function dispose() {
    properties = /* @__PURE__ */ new WeakMap();
  }
  __name(dispose, "dispose");
  return {
    has,
    get,
    remove,
    update,
    dispose
  };
}
__name(WebGLProperties, "WebGLProperties");
function painterSortStable(a, b) {
  if (a.groupOrder !== b.groupOrder) {
    return a.groupOrder - b.groupOrder;
  } else if (a.renderOrder !== b.renderOrder) {
    return a.renderOrder - b.renderOrder;
  } else if (a.material.id !== b.material.id) {
    return a.material.id - b.material.id;
  } else if (a.z !== b.z) {
    return a.z - b.z;
  } else {
    return a.id - b.id;
  }
}
__name(painterSortStable, "painterSortStable");
function reversePainterSortStable(a, b) {
  if (a.groupOrder !== b.groupOrder) {
    return a.groupOrder - b.groupOrder;
  } else if (a.renderOrder !== b.renderOrder) {
    return a.renderOrder - b.renderOrder;
  } else if (a.z !== b.z) {
    return b.z - a.z;
  } else {
    return a.id - b.id;
  }
}
__name(reversePainterSortStable, "reversePainterSortStable");
function WebGLRenderList() {
  const renderItems = [];
  let renderItemsIndex = 0;
  const opaque = [];
  const transmissive = [];
  const transparent = [];
  function init() {
    renderItemsIndex = 0;
    opaque.length = 0;
    transmissive.length = 0;
    transparent.length = 0;
  }
  __name(init, "init");
  function getNextRenderItem(object, geometry, material, groupOrder, z, group) {
    let renderItem = renderItems[renderItemsIndex];
    if (renderItem === void 0) {
      renderItem = {
        id: object.id,
        object,
        geometry,
        material,
        groupOrder,
        renderOrder: object.renderOrder,
        z,
        group
      };
      renderItems[renderItemsIndex] = renderItem;
    } else {
      renderItem.id = object.id;
      renderItem.object = object;
      renderItem.geometry = geometry;
      renderItem.material = material;
      renderItem.groupOrder = groupOrder;
      renderItem.renderOrder = object.renderOrder;
      renderItem.z = z;
      renderItem.group = group;
    }
    renderItemsIndex++;
    return renderItem;
  }
  __name(getNextRenderItem, "getNextRenderItem");
  function push(object, geometry, material, groupOrder, z, group) {
    const renderItem = getNextRenderItem(object, geometry, material, groupOrder, z, group);
    if (material.transmission > 0) {
      transmissive.push(renderItem);
    } else if (material.transparent === true) {
      transparent.push(renderItem);
    } else {
      opaque.push(renderItem);
    }
  }
  __name(push, "push");
  function unshift(object, geometry, material, groupOrder, z, group) {
    const renderItem = getNextRenderItem(object, geometry, material, groupOrder, z, group);
    if (material.transmission > 0) {
      transmissive.unshift(renderItem);
    } else if (material.transparent === true) {
      transparent.unshift(renderItem);
    } else {
      opaque.unshift(renderItem);
    }
  }
  __name(unshift, "unshift");
  function sort(customOpaqueSort, customTransparentSort) {
    if (opaque.length > 1) opaque.sort(customOpaqueSort || painterSortStable);
    if (transmissive.length > 1) transmissive.sort(customTransparentSort || reversePainterSortStable);
    if (transparent.length > 1) transparent.sort(customTransparentSort || reversePainterSortStable);
  }
  __name(sort, "sort");
  function finish() {
    for (let i = renderItemsIndex, il = renderItems.length; i < il; i++) {
      const renderItem = renderItems[i];
      if (renderItem.id === null) break;
      renderItem.id = null;
      renderItem.object = null;
      renderItem.geometry = null;
      renderItem.material = null;
      renderItem.group = null;
    }
  }
  __name(finish, "finish");
  return {
    opaque,
    transmissive,
    transparent,
    init,
    push,
    unshift,
    finish,
    sort
  };
}
__name(WebGLRenderList, "WebGLRenderList");
function WebGLRenderLists() {
  let lists = /* @__PURE__ */ new WeakMap();
  function get(scene, renderCallDepth) {
    const listArray = lists.get(scene);
    let list;
    if (listArray === void 0) {
      list = new WebGLRenderList();
      lists.set(scene, [list]);
    } else {
      if (renderCallDepth >= listArray.length) {
        list = new WebGLRenderList();
        listArray.push(list);
      } else {
        list = listArray[renderCallDepth];
      }
    }
    return list;
  }
  __name(get, "get");
  function dispose() {
    lists = /* @__PURE__ */ new WeakMap();
  }
  __name(dispose, "dispose");
  return {
    get,
    dispose
  };
}
__name(WebGLRenderLists, "WebGLRenderLists");
function UniformsCache() {
  const lights = {};
  return {
    get: /* @__PURE__ */ __name(function(light) {
      if (lights[light.id] !== void 0) {
        return lights[light.id];
      }
      let uniforms;
      switch (light.type) {
        case "DirectionalLight":
          uniforms = {
            direction: new Vector3(),
            color: new Color()
          };
          break;
        case "SpotLight":
          uniforms = {
            position: new Vector3(),
            direction: new Vector3(),
            color: new Color(),
            distance: 0,
            coneCos: 0,
            penumbraCos: 0,
            decay: 0
          };
          break;
        case "PointLight":
          uniforms = {
            position: new Vector3(),
            color: new Color(),
            distance: 0,
            decay: 0
          };
          break;
        case "HemisphereLight":
          uniforms = {
            direction: new Vector3(),
            skyColor: new Color(),
            groundColor: new Color()
          };
          break;
        case "RectAreaLight":
          uniforms = {
            color: new Color(),
            position: new Vector3(),
            halfWidth: new Vector3(),
            halfHeight: new Vector3()
          };
          break;
      }
      lights[light.id] = uniforms;
      return uniforms;
    }, "get")
  };
}
__name(UniformsCache, "UniformsCache");
function ShadowUniformsCache() {
  const lights = {};
  return {
    get: /* @__PURE__ */ __name(function(light) {
      if (lights[light.id] !== void 0) {
        return lights[light.id];
      }
      let uniforms;
      switch (light.type) {
        case "DirectionalLight":
          uniforms = {
            shadowIntensity: 1,
            shadowBias: 0,
            shadowNormalBias: 0,
            shadowRadius: 1,
            shadowMapSize: new Vector2()
          };
          break;
        case "SpotLight":
          uniforms = {
            shadowIntensity: 1,
            shadowBias: 0,
            shadowNormalBias: 0,
            shadowRadius: 1,
            shadowMapSize: new Vector2()
          };
          break;
        case "PointLight":
          uniforms = {
            shadowIntensity: 1,
            shadowBias: 0,
            shadowNormalBias: 0,
            shadowRadius: 1,
            shadowMapSize: new Vector2(),
            shadowCameraNear: 1,
            shadowCameraFar: 1e3
          };
          break;
      }
      lights[light.id] = uniforms;
      return uniforms;
    }, "get")
  };
}
__name(ShadowUniformsCache, "ShadowUniformsCache");
let nextVersion = 0;
function shadowCastingAndTexturingLightsFirst(lightA, lightB) {
  return (lightB.castShadow ? 2 : 0) - (lightA.castShadow ? 2 : 0) + (lightB.map ? 1 : 0) - (lightA.map ? 1 : 0);
}
__name(shadowCastingAndTexturingLightsFirst, "shadowCastingAndTexturingLightsFirst");
function WebGLLights(extensions) {
  const cache = new UniformsCache();
  const shadowCache = ShadowUniformsCache();
  const state = {
    version: 0,
    hash: {
      directionalLength: -1,
      pointLength: -1,
      spotLength: -1,
      rectAreaLength: -1,
      hemiLength: -1,
      numDirectionalShadows: -1,
      numPointShadows: -1,
      numSpotShadows: -1,
      numSpotMaps: -1,
      numLightProbes: -1
    },
    ambient: [0, 0, 0],
    probe: [],
    directional: [],
    directionalShadow: [],
    directionalShadowMap: [],
    directionalShadowMatrix: [],
    spot: [],
    spotLightMap: [],
    spotShadow: [],
    spotShadowMap: [],
    spotLightMatrix: [],
    rectArea: [],
    rectAreaLTC1: null,
    rectAreaLTC2: null,
    point: [],
    pointShadow: [],
    pointShadowMap: [],
    pointShadowMatrix: [],
    hemi: [],
    numSpotLightShadowsWithMaps: 0,
    numLightProbes: 0
  };
  for (let i = 0; i < 9; i++) state.probe.push(new Vector3());
  const vector3 = new Vector3();
  const matrix4 = new Matrix4();
  const matrix42 = new Matrix4();
  function setup(lights) {
    let r = 0, g = 0, b = 0;
    for (let i = 0; i < 9; i++) state.probe[i].set(0, 0, 0);
    let directionalLength = 0;
    let pointLength = 0;
    let spotLength = 0;
    let rectAreaLength = 0;
    let hemiLength = 0;
    let numDirectionalShadows = 0;
    let numPointShadows = 0;
    let numSpotShadows = 0;
    let numSpotMaps = 0;
    let numSpotShadowsWithMaps = 0;
    let numLightProbes = 0;
    lights.sort(shadowCastingAndTexturingLightsFirst);
    for (let i = 0, l = lights.length; i < l; i++) {
      const light = lights[i];
      const color = light.color;
      const intensity = light.intensity;
      const distance = light.distance;
      const shadowMap = light.shadow && light.shadow.map ? light.shadow.map.texture : null;
      if (light.isAmbientLight) {
        r += color.r * intensity;
        g += color.g * intensity;
        b += color.b * intensity;
      } else if (light.isLightProbe) {
        for (let j = 0; j < 9; j++) {
          state.probe[j].addScaledVector(light.sh.coefficients[j], intensity);
        }
        numLightProbes++;
      } else if (light.isDirectionalLight) {
        const uniforms = cache.get(light);
        uniforms.color.copy(light.color).multiplyScalar(light.intensity);
        if (light.castShadow) {
          const shadow = light.shadow;
          const shadowUniforms = shadowCache.get(light);
          shadowUniforms.shadowIntensity = shadow.intensity;
          shadowUniforms.shadowBias = shadow.bias;
          shadowUniforms.shadowNormalBias = shadow.normalBias;
          shadowUniforms.shadowRadius = shadow.radius;
          shadowUniforms.shadowMapSize = shadow.mapSize;
          state.directionalShadow[directionalLength] = shadowUniforms;
          state.directionalShadowMap[directionalLength] = shadowMap;
          state.directionalShadowMatrix[directionalLength] = light.shadow.matrix;
          numDirectionalShadows++;
        }
        state.directional[directionalLength] = uniforms;
        directionalLength++;
      } else if (light.isSpotLight) {
        const uniforms = cache.get(light);
        uniforms.position.setFromMatrixPosition(light.matrixWorld);
        uniforms.color.copy(color).multiplyScalar(intensity);
        uniforms.distance = distance;
        uniforms.coneCos = Math.cos(light.angle);
        uniforms.penumbraCos = Math.cos(light.angle * (1 - light.penumbra));
        uniforms.decay = light.decay;
        state.spot[spotLength] = uniforms;
        const shadow = light.shadow;
        if (light.map) {
          state.spotLightMap[numSpotMaps] = light.map;
          numSpotMaps++;
          shadow.updateMatrices(light);
          if (light.castShadow) numSpotShadowsWithMaps++;
        }
        state.spotLightMatrix[spotLength] = shadow.matrix;
        if (light.castShadow) {
          const shadowUniforms = shadowCache.get(light);
          shadowUniforms.shadowIntensity = shadow.intensity;
          shadowUniforms.shadowBias = shadow.bias;
          shadowUniforms.shadowNormalBias = shadow.normalBias;
          shadowUniforms.shadowRadius = shadow.radius;
          shadowUniforms.shadowMapSize = shadow.mapSize;
          state.spotShadow[spotLength] = shadowUniforms;
          state.spotShadowMap[spotLength] = shadowMap;
          numSpotShadows++;
        }
        spotLength++;
      } else if (light.isRectAreaLight) {
        const uniforms = cache.get(light);
        uniforms.color.copy(color).multiplyScalar(intensity);
        uniforms.halfWidth.set(light.width * 0.5, 0, 0);
        uniforms.halfHeight.set(0, light.height * 0.5, 0);
        state.rectArea[rectAreaLength] = uniforms;
        rectAreaLength++;
      } else if (light.isPointLight) {
        const uniforms = cache.get(light);
        uniforms.color.copy(light.color).multiplyScalar(light.intensity);
        uniforms.distance = light.distance;
        uniforms.decay = light.decay;
        if (light.castShadow) {
          const shadow = light.shadow;
          const shadowUniforms = shadowCache.get(light);
          shadowUniforms.shadowIntensity = shadow.intensity;
          shadowUniforms.shadowBias = shadow.bias;
          shadowUniforms.shadowNormalBias = shadow.normalBias;
          shadowUniforms.shadowRadius = shadow.radius;
          shadowUniforms.shadowMapSize = shadow.mapSize;
          shadowUniforms.shadowCameraNear = shadow.camera.near;
          shadowUniforms.shadowCameraFar = shadow.camera.far;
          state.pointShadow[pointLength] = shadowUniforms;
          state.pointShadowMap[pointLength] = shadowMap;
          state.pointShadowMatrix[pointLength] = light.shadow.matrix;
          numPointShadows++;
        }
        state.point[pointLength] = uniforms;
        pointLength++;
      } else if (light.isHemisphereLight) {
        const uniforms = cache.get(light);
        uniforms.skyColor.copy(light.color).multiplyScalar(intensity);
        uniforms.groundColor.copy(light.groundColor).multiplyScalar(intensity);
        state.hemi[hemiLength] = uniforms;
        hemiLength++;
      }
    }
    if (rectAreaLength > 0) {
      if (extensions.has("OES_texture_float_linear") === true) {
        state.rectAreaLTC1 = UniformsLib.LTC_FLOAT_1;
        state.rectAreaLTC2 = UniformsLib.LTC_FLOAT_2;
      } else {
        state.rectAreaLTC1 = UniformsLib.LTC_HALF_1;
        state.rectAreaLTC2 = UniformsLib.LTC_HALF_2;
      }
    }
    state.ambient[0] = r;
    state.ambient[1] = g;
    state.ambient[2] = b;
    const hash = state.hash;
    if (hash.directionalLength !== directionalLength || hash.pointLength !== pointLength || hash.spotLength !== spotLength || hash.rectAreaLength !== rectAreaLength || hash.hemiLength !== hemiLength || hash.numDirectionalShadows !== numDirectionalShadows || hash.numPointShadows !== numPointShadows || hash.numSpotShadows !== numSpotShadows || hash.numSpotMaps !== numSpotMaps || hash.numLightProbes !== numLightProbes) {
      state.directional.length = directionalLength;
      state.spot.length = spotLength;
      state.rectArea.length = rectAreaLength;
      state.point.length = pointLength;
      state.hemi.length = hemiLength;
      state.directionalShadow.length = numDirectionalShadows;
      state.directionalShadowMap.length = numDirectionalShadows;
      state.pointShadow.length = numPointShadows;
      state.pointShadowMap.length = numPointShadows;
      state.spotShadow.length = numSpotShadows;
      state.spotShadowMap.length = numSpotShadows;
      state.directionalShadowMatrix.length = numDirectionalShadows;
      state.pointShadowMatrix.length = numPointShadows;
      state.spotLightMatrix.length = numSpotShadows + numSpotMaps - numSpotShadowsWithMaps;
      state.spotLightMap.length = numSpotMaps;
      state.numSpotLightShadowsWithMaps = numSpotShadowsWithMaps;
      state.numLightProbes = numLightProbes;
      hash.directionalLength = directionalLength;
      hash.pointLength = pointLength;
      hash.spotLength = spotLength;
      hash.rectAreaLength = rectAreaLength;
      hash.hemiLength = hemiLength;
      hash.numDirectionalShadows = numDirectionalShadows;
      hash.numPointShadows = numPointShadows;
      hash.numSpotShadows = numSpotShadows;
      hash.numSpotMaps = numSpotMaps;
      hash.numLightProbes = numLightProbes;
      state.version = nextVersion++;
    }
  }
  __name(setup, "setup");
  function setupView(lights, camera) {
    let directionalLength = 0;
    let pointLength = 0;
    let spotLength = 0;
    let rectAreaLength = 0;
    let hemiLength = 0;
    const viewMatrix = camera.matrixWorldInverse;
    for (let i = 0, l = lights.length; i < l; i++) {
      const light = lights[i];
      if (light.isDirectionalLight) {
        const uniforms = state.directional[directionalLength];
        uniforms.direction.setFromMatrixPosition(light.matrixWorld);
        vector3.setFromMatrixPosition(light.target.matrixWorld);
        uniforms.direction.sub(vector3);
        uniforms.direction.transformDirection(viewMatrix);
        directionalLength++;
      } else if (light.isSpotLight) {
        const uniforms = state.spot[spotLength];
        uniforms.position.setFromMatrixPosition(light.matrixWorld);
        uniforms.position.applyMatrix4(viewMatrix);
        uniforms.direction.setFromMatrixPosition(light.matrixWorld);
        vector3.setFromMatrixPosition(light.target.matrixWorld);
        uniforms.direction.sub(vector3);
        uniforms.direction.transformDirection(viewMatrix);
        spotLength++;
      } else if (light.isRectAreaLight) {
        const uniforms = state.rectArea[rectAreaLength];
        uniforms.position.setFromMatrixPosition(light.matrixWorld);
        uniforms.position.applyMatrix4(viewMatrix);
        matrix42.identity();
        matrix4.copy(light.matrixWorld);
        matrix4.premultiply(viewMatrix);
        matrix42.extractRotation(matrix4);
        uniforms.halfWidth.set(light.width * 0.5, 0, 0);
        uniforms.halfHeight.set(0, light.height * 0.5, 0);
        uniforms.halfWidth.applyMatrix4(matrix42);
        uniforms.halfHeight.applyMatrix4(matrix42);
        rectAreaLength++;
      } else if (light.isPointLight) {
        const uniforms = state.point[pointLength];
        uniforms.position.setFromMatrixPosition(light.matrixWorld);
        uniforms.position.applyMatrix4(viewMatrix);
        pointLength++;
      } else if (light.isHemisphereLight) {
        const uniforms = state.hemi[hemiLength];
        uniforms.direction.setFromMatrixPosition(light.matrixWorld);
        uniforms.direction.transformDirection(viewMatrix);
        hemiLength++;
      }
    }
  }
  __name(setupView, "setupView");
  return {
    setup,
    setupView,
    state
  };
}
__name(WebGLLights, "WebGLLights");
function WebGLRenderState(extensions) {
  const lights = new WebGLLights(extensions);
  const lightsArray = [];
  const shadowsArray = [];
  function init(camera) {
    state.camera = camera;
    lightsArray.length = 0;
    shadowsArray.length = 0;
  }
  __name(init, "init");
  function pushLight(light) {
    lightsArray.push(light);
  }
  __name(pushLight, "pushLight");
  function pushShadow(shadowLight) {
    shadowsArray.push(shadowLight);
  }
  __name(pushShadow, "pushShadow");
  function setupLights() {
    lights.setup(lightsArray);
  }
  __name(setupLights, "setupLights");
  function setupLightsView(camera) {
    lights.setupView(lightsArray, camera);
  }
  __name(setupLightsView, "setupLightsView");
  const state = {
    lightsArray,
    shadowsArray,
    camera: null,
    lights,
    transmissionRenderTarget: {}
  };
  return {
    init,
    state,
    setupLights,
    setupLightsView,
    pushLight,
    pushShadow
  };
}
__name(WebGLRenderState, "WebGLRenderState");
function WebGLRenderStates(extensions) {
  let renderStates = /* @__PURE__ */ new WeakMap();
  function get(scene, renderCallDepth = 0) {
    const renderStateArray = renderStates.get(scene);
    let renderState;
    if (renderStateArray === void 0) {
      renderState = new WebGLRenderState(extensions);
      renderStates.set(scene, [renderState]);
    } else {
      if (renderCallDepth >= renderStateArray.length) {
        renderState = new WebGLRenderState(extensions);
        renderStateArray.push(renderState);
      } else {
        renderState = renderStateArray[renderCallDepth];
      }
    }
    return renderState;
  }
  __name(get, "get");
  function dispose() {
    renderStates = /* @__PURE__ */ new WeakMap();
  }
  __name(dispose, "dispose");
  return {
    get,
    dispose
  };
}
__name(WebGLRenderStates, "WebGLRenderStates");
class MeshDepthMaterial extends Material {
  static {
    __name(this, "MeshDepthMaterial");
  }
  static get type() {
    return "MeshDepthMaterial";
  }
  constructor(parameters) {
    super();
    this.isMeshDepthMaterial = true;
    this.depthPacking = BasicDepthPacking;
    this.map = null;
    this.alphaMap = null;
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.depthPacking = source.depthPacking;
    this.map = source.map;
    this.alphaMap = source.alphaMap;
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    return this;
  }
}
class MeshDistanceMaterial extends Material {
  static {
    __name(this, "MeshDistanceMaterial");
  }
  static get type() {
    return "MeshDistanceMaterial";
  }
  constructor(parameters) {
    super();
    this.isMeshDistanceMaterial = true;
    this.map = null;
    this.alphaMap = null;
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.map = source.map;
    this.alphaMap = source.alphaMap;
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    return this;
  }
}
const vertex = "void main() {\n	gl_Position = vec4( position, 1.0 );\n}";
const fragment = "uniform sampler2D shadow_pass;\nuniform vec2 resolution;\nuniform float radius;\n#include <packing>\nvoid main() {\n	const float samples = float( VSM_SAMPLES );\n	float mean = 0.0;\n	float squared_mean = 0.0;\n	float uvStride = samples <= 1.0 ? 0.0 : 2.0 / ( samples - 1.0 );\n	float uvStart = samples <= 1.0 ? 0.0 : - 1.0;\n	for ( float i = 0.0; i < samples; i ++ ) {\n		float uvOffset = uvStart + i * uvStride;\n		#ifdef HORIZONTAL_PASS\n			vec2 distribution = unpackRGBATo2Half( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( uvOffset, 0.0 ) * radius ) / resolution ) );\n			mean += distribution.x;\n			squared_mean += distribution.y * distribution.y + distribution.x * distribution.x;\n		#else\n			float depth = unpackRGBAToDepth( texture2D( shadow_pass, ( gl_FragCoord.xy + vec2( 0.0, uvOffset ) * radius ) / resolution ) );\n			mean += depth;\n			squared_mean += depth * depth;\n		#endif\n	}\n	mean = mean / samples;\n	squared_mean = squared_mean / samples;\n	float std_dev = sqrt( squared_mean - mean * mean );\n	gl_FragColor = pack2HalfToRGBA( vec2( mean, std_dev ) );\n}";
function WebGLShadowMap(renderer, objects, capabilities) {
  let _frustum = new Frustum();
  const _shadowMapSize = new Vector2(), _viewportSize = new Vector2(), _viewport = new Vector4(), _depthMaterial = new MeshDepthMaterial({ depthPacking: RGBADepthPacking }), _distanceMaterial = new MeshDistanceMaterial(), _materialCache = {}, _maxTextureSize = capabilities.maxTextureSize;
  const shadowSide = { [FrontSide]: BackSide, [BackSide]: FrontSide, [DoubleSide]: DoubleSide };
  const shadowMaterialVertical = new ShaderMaterial({
    defines: {
      VSM_SAMPLES: 8
    },
    uniforms: {
      shadow_pass: { value: null },
      resolution: { value: new Vector2() },
      radius: { value: 4 }
    },
    vertexShader: vertex,
    fragmentShader: fragment
  });
  const shadowMaterialHorizontal = shadowMaterialVertical.clone();
  shadowMaterialHorizontal.defines.HORIZONTAL_PASS = 1;
  const fullScreenTri = new BufferGeometry();
  fullScreenTri.setAttribute(
    "position",
    new BufferAttribute(
      new Float32Array([-1, -1, 0.5, 3, -1, 0.5, -1, 3, 0.5]),
      3
    )
  );
  const fullScreenMesh = new Mesh(fullScreenTri, shadowMaterialVertical);
  const scope = this;
  this.enabled = false;
  this.autoUpdate = true;
  this.needsUpdate = false;
  this.type = PCFShadowMap;
  let _previousType = this.type;
  this.render = function(lights, scene, camera) {
    if (scope.enabled === false) return;
    if (scope.autoUpdate === false && scope.needsUpdate === false) return;
    if (lights.length === 0) return;
    const currentRenderTarget = renderer.getRenderTarget();
    const activeCubeFace = renderer.getActiveCubeFace();
    const activeMipmapLevel = renderer.getActiveMipmapLevel();
    const _state = renderer.state;
    _state.setBlending(NoBlending);
    _state.buffers.color.setClear(1, 1, 1, 1);
    _state.buffers.depth.setTest(true);
    _state.setScissorTest(false);
    const toVSM = _previousType !== VSMShadowMap && this.type === VSMShadowMap;
    const fromVSM = _previousType === VSMShadowMap && this.type !== VSMShadowMap;
    for (let i = 0, il = lights.length; i < il; i++) {
      const light = lights[i];
      const shadow = light.shadow;
      if (shadow === void 0) {
        console.warn("THREE.WebGLShadowMap:", light, "has no shadow.");
        continue;
      }
      if (shadow.autoUpdate === false && shadow.needsUpdate === false) continue;
      _shadowMapSize.copy(shadow.mapSize);
      const shadowFrameExtents = shadow.getFrameExtents();
      _shadowMapSize.multiply(shadowFrameExtents);
      _viewportSize.copy(shadow.mapSize);
      if (_shadowMapSize.x > _maxTextureSize || _shadowMapSize.y > _maxTextureSize) {
        if (_shadowMapSize.x > _maxTextureSize) {
          _viewportSize.x = Math.floor(_maxTextureSize / shadowFrameExtents.x);
          _shadowMapSize.x = _viewportSize.x * shadowFrameExtents.x;
          shadow.mapSize.x = _viewportSize.x;
        }
        if (_shadowMapSize.y > _maxTextureSize) {
          _viewportSize.y = Math.floor(_maxTextureSize / shadowFrameExtents.y);
          _shadowMapSize.y = _viewportSize.y * shadowFrameExtents.y;
          shadow.mapSize.y = _viewportSize.y;
        }
      }
      if (shadow.map === null || toVSM === true || fromVSM === true) {
        const pars = this.type !== VSMShadowMap ? { minFilter: NearestFilter, magFilter: NearestFilter } : {};
        if (shadow.map !== null) {
          shadow.map.dispose();
        }
        shadow.map = new WebGLRenderTarget(_shadowMapSize.x, _shadowMapSize.y, pars);
        shadow.map.texture.name = light.name + ".shadowMap";
        shadow.camera.updateProjectionMatrix();
      }
      renderer.setRenderTarget(shadow.map);
      renderer.clear();
      const viewportCount = shadow.getViewportCount();
      for (let vp = 0; vp < viewportCount; vp++) {
        const viewport = shadow.getViewport(vp);
        _viewport.set(
          _viewportSize.x * viewport.x,
          _viewportSize.y * viewport.y,
          _viewportSize.x * viewport.z,
          _viewportSize.y * viewport.w
        );
        _state.viewport(_viewport);
        shadow.updateMatrices(light, vp);
        _frustum = shadow.getFrustum();
        renderObject(scene, camera, shadow.camera, light, this.type);
      }
      if (shadow.isPointLightShadow !== true && this.type === VSMShadowMap) {
        VSMPass(shadow, camera);
      }
      shadow.needsUpdate = false;
    }
    _previousType = this.type;
    scope.needsUpdate = false;
    renderer.setRenderTarget(currentRenderTarget, activeCubeFace, activeMipmapLevel);
  };
  function VSMPass(shadow, camera) {
    const geometry = objects.update(fullScreenMesh);
    if (shadowMaterialVertical.defines.VSM_SAMPLES !== shadow.blurSamples) {
      shadowMaterialVertical.defines.VSM_SAMPLES = shadow.blurSamples;
      shadowMaterialHorizontal.defines.VSM_SAMPLES = shadow.blurSamples;
      shadowMaterialVertical.needsUpdate = true;
      shadowMaterialHorizontal.needsUpdate = true;
    }
    if (shadow.mapPass === null) {
      shadow.mapPass = new WebGLRenderTarget(_shadowMapSize.x, _shadowMapSize.y);
    }
    shadowMaterialVertical.uniforms.shadow_pass.value = shadow.map.texture;
    shadowMaterialVertical.uniforms.resolution.value = shadow.mapSize;
    shadowMaterialVertical.uniforms.radius.value = shadow.radius;
    renderer.setRenderTarget(shadow.mapPass);
    renderer.clear();
    renderer.renderBufferDirect(camera, null, geometry, shadowMaterialVertical, fullScreenMesh, null);
    shadowMaterialHorizontal.uniforms.shadow_pass.value = shadow.mapPass.texture;
    shadowMaterialHorizontal.uniforms.resolution.value = shadow.mapSize;
    shadowMaterialHorizontal.uniforms.radius.value = shadow.radius;
    renderer.setRenderTarget(shadow.map);
    renderer.clear();
    renderer.renderBufferDirect(camera, null, geometry, shadowMaterialHorizontal, fullScreenMesh, null);
  }
  __name(VSMPass, "VSMPass");
  function getDepthMaterial(object, material, light, type) {
    let result = null;
    const customMaterial = light.isPointLight === true ? object.customDistanceMaterial : object.customDepthMaterial;
    if (customMaterial !== void 0) {
      result = customMaterial;
    } else {
      result = light.isPointLight === true ? _distanceMaterial : _depthMaterial;
      if (renderer.localClippingEnabled && material.clipShadows === true && Array.isArray(material.clippingPlanes) && material.clippingPlanes.length !== 0 || material.displacementMap && material.displacementScale !== 0 || material.alphaMap && material.alphaTest > 0 || material.map && material.alphaTest > 0) {
        const keyA = result.uuid, keyB = material.uuid;
        let materialsForVariant = _materialCache[keyA];
        if (materialsForVariant === void 0) {
          materialsForVariant = {};
          _materialCache[keyA] = materialsForVariant;
        }
        let cachedMaterial = materialsForVariant[keyB];
        if (cachedMaterial === void 0) {
          cachedMaterial = result.clone();
          materialsForVariant[keyB] = cachedMaterial;
          material.addEventListener("dispose", onMaterialDispose);
        }
        result = cachedMaterial;
      }
    }
    result.visible = material.visible;
    result.wireframe = material.wireframe;
    if (type === VSMShadowMap) {
      result.side = material.shadowSide !== null ? material.shadowSide : material.side;
    } else {
      result.side = material.shadowSide !== null ? material.shadowSide : shadowSide[material.side];
    }
    result.alphaMap = material.alphaMap;
    result.alphaTest = material.alphaTest;
    result.map = material.map;
    result.clipShadows = material.clipShadows;
    result.clippingPlanes = material.clippingPlanes;
    result.clipIntersection = material.clipIntersection;
    result.displacementMap = material.displacementMap;
    result.displacementScale = material.displacementScale;
    result.displacementBias = material.displacementBias;
    result.wireframeLinewidth = material.wireframeLinewidth;
    result.linewidth = material.linewidth;
    if (light.isPointLight === true && result.isMeshDistanceMaterial === true) {
      const materialProperties = renderer.properties.get(result);
      materialProperties.light = light;
    }
    return result;
  }
  __name(getDepthMaterial, "getDepthMaterial");
  function renderObject(object, camera, shadowCamera, light, type) {
    if (object.visible === false) return;
    const visible = object.layers.test(camera.layers);
    if (visible && (object.isMesh || object.isLine || object.isPoints)) {
      if ((object.castShadow || object.receiveShadow && type === VSMShadowMap) && (!object.frustumCulled || _frustum.intersectsObject(object))) {
        object.modelViewMatrix.multiplyMatrices(shadowCamera.matrixWorldInverse, object.matrixWorld);
        const geometry = objects.update(object);
        const material = object.material;
        if (Array.isArray(material)) {
          const groups = geometry.groups;
          for (let k = 0, kl = groups.length; k < kl; k++) {
            const group = groups[k];
            const groupMaterial = material[group.materialIndex];
            if (groupMaterial && groupMaterial.visible) {
              const depthMaterial = getDepthMaterial(object, groupMaterial, light, type);
              object.onBeforeShadow(renderer, object, camera, shadowCamera, geometry, depthMaterial, group);
              renderer.renderBufferDirect(shadowCamera, null, geometry, depthMaterial, object, group);
              object.onAfterShadow(renderer, object, camera, shadowCamera, geometry, depthMaterial, group);
            }
          }
        } else if (material.visible) {
          const depthMaterial = getDepthMaterial(object, material, light, type);
          object.onBeforeShadow(renderer, object, camera, shadowCamera, geometry, depthMaterial, null);
          renderer.renderBufferDirect(shadowCamera, null, geometry, depthMaterial, object, null);
          object.onAfterShadow(renderer, object, camera, shadowCamera, geometry, depthMaterial, null);
        }
      }
    }
    const children = object.children;
    for (let i = 0, l = children.length; i < l; i++) {
      renderObject(children[i], camera, shadowCamera, light, type);
    }
  }
  __name(renderObject, "renderObject");
  function onMaterialDispose(event) {
    const material = event.target;
    material.removeEventListener("dispose", onMaterialDispose);
    for (const id in _materialCache) {
      const cache = _materialCache[id];
      const uuid = event.target.uuid;
      if (uuid in cache) {
        const shadowMaterial = cache[uuid];
        shadowMaterial.dispose();
        delete cache[uuid];
      }
    }
  }
  __name(onMaterialDispose, "onMaterialDispose");
}
__name(WebGLShadowMap, "WebGLShadowMap");
const reversedFuncs = {
  [NeverDepth]: AlwaysDepth,
  [LessDepth]: GreaterDepth,
  [EqualDepth]: NotEqualDepth,
  [LessEqualDepth]: GreaterEqualDepth,
  [AlwaysDepth]: NeverDepth,
  [GreaterDepth]: LessDepth,
  [NotEqualDepth]: EqualDepth,
  [GreaterEqualDepth]: LessEqualDepth
};
function WebGLState(gl, extensions) {
  function ColorBuffer() {
    let locked = false;
    const color = new Vector4();
    let currentColorMask = null;
    const currentColorClear = new Vector4(0, 0, 0, 0);
    return {
      setMask: /* @__PURE__ */ __name(function(colorMask) {
        if (currentColorMask !== colorMask && !locked) {
          gl.colorMask(colorMask, colorMask, colorMask, colorMask);
          currentColorMask = colorMask;
        }
      }, "setMask"),
      setLocked: /* @__PURE__ */ __name(function(lock) {
        locked = lock;
      }, "setLocked"),
      setClear: /* @__PURE__ */ __name(function(r, g, b, a, premultipliedAlpha) {
        if (premultipliedAlpha === true) {
          r *= a;
          g *= a;
          b *= a;
        }
        color.set(r, g, b, a);
        if (currentColorClear.equals(color) === false) {
          gl.clearColor(r, g, b, a);
          currentColorClear.copy(color);
        }
      }, "setClear"),
      reset: /* @__PURE__ */ __name(function() {
        locked = false;
        currentColorMask = null;
        currentColorClear.set(-1, 0, 0, 0);
      }, "reset")
    };
  }
  __name(ColorBuffer, "ColorBuffer");
  function DepthBuffer() {
    let locked = false;
    let reversed = false;
    let currentDepthMask = null;
    let currentDepthFunc = null;
    let currentDepthClear = null;
    return {
      setReversed: /* @__PURE__ */ __name(function(value) {
        if (reversed !== value) {
          const ext = extensions.get("EXT_clip_control");
          if (reversed) {
            ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.ZERO_TO_ONE_EXT);
          } else {
            ext.clipControlEXT(ext.LOWER_LEFT_EXT, ext.NEGATIVE_ONE_TO_ONE_EXT);
          }
          const oldDepth = currentDepthClear;
          currentDepthClear = null;
          this.setClear(oldDepth);
        }
        reversed = value;
      }, "setReversed"),
      getReversed: /* @__PURE__ */ __name(function() {
        return reversed;
      }, "getReversed"),
      setTest: /* @__PURE__ */ __name(function(depthTest) {
        if (depthTest) {
          enable(gl.DEPTH_TEST);
        } else {
          disable(gl.DEPTH_TEST);
        }
      }, "setTest"),
      setMask: /* @__PURE__ */ __name(function(depthMask) {
        if (currentDepthMask !== depthMask && !locked) {
          gl.depthMask(depthMask);
          currentDepthMask = depthMask;
        }
      }, "setMask"),
      setFunc: /* @__PURE__ */ __name(function(depthFunc) {
        if (reversed) depthFunc = reversedFuncs[depthFunc];
        if (currentDepthFunc !== depthFunc) {
          switch (depthFunc) {
            case NeverDepth:
              gl.depthFunc(gl.NEVER);
              break;
            case AlwaysDepth:
              gl.depthFunc(gl.ALWAYS);
              break;
            case LessDepth:
              gl.depthFunc(gl.LESS);
              break;
            case LessEqualDepth:
              gl.depthFunc(gl.LEQUAL);
              break;
            case EqualDepth:
              gl.depthFunc(gl.EQUAL);
              break;
            case GreaterEqualDepth:
              gl.depthFunc(gl.GEQUAL);
              break;
            case GreaterDepth:
              gl.depthFunc(gl.GREATER);
              break;
            case NotEqualDepth:
              gl.depthFunc(gl.NOTEQUAL);
              break;
            default:
              gl.depthFunc(gl.LEQUAL);
          }
          currentDepthFunc = depthFunc;
        }
      }, "setFunc"),
      setLocked: /* @__PURE__ */ __name(function(lock) {
        locked = lock;
      }, "setLocked"),
      setClear: /* @__PURE__ */ __name(function(depth) {
        if (currentDepthClear !== depth) {
          if (reversed) {
            depth = 1 - depth;
          }
          gl.clearDepth(depth);
          currentDepthClear = depth;
        }
      }, "setClear"),
      reset: /* @__PURE__ */ __name(function() {
        locked = false;
        currentDepthMask = null;
        currentDepthFunc = null;
        currentDepthClear = null;
        reversed = false;
      }, "reset")
    };
  }
  __name(DepthBuffer, "DepthBuffer");
  function StencilBuffer() {
    let locked = false;
    let currentStencilMask = null;
    let currentStencilFunc = null;
    let currentStencilRef = null;
    let currentStencilFuncMask = null;
    let currentStencilFail = null;
    let currentStencilZFail = null;
    let currentStencilZPass = null;
    let currentStencilClear = null;
    return {
      setTest: /* @__PURE__ */ __name(function(stencilTest) {
        if (!locked) {
          if (stencilTest) {
            enable(gl.STENCIL_TEST);
          } else {
            disable(gl.STENCIL_TEST);
          }
        }
      }, "setTest"),
      setMask: /* @__PURE__ */ __name(function(stencilMask) {
        if (currentStencilMask !== stencilMask && !locked) {
          gl.stencilMask(stencilMask);
          currentStencilMask = stencilMask;
        }
      }, "setMask"),
      setFunc: /* @__PURE__ */ __name(function(stencilFunc, stencilRef, stencilMask) {
        if (currentStencilFunc !== stencilFunc || currentStencilRef !== stencilRef || currentStencilFuncMask !== stencilMask) {
          gl.stencilFunc(stencilFunc, stencilRef, stencilMask);
          currentStencilFunc = stencilFunc;
          currentStencilRef = stencilRef;
          currentStencilFuncMask = stencilMask;
        }
      }, "setFunc"),
      setOp: /* @__PURE__ */ __name(function(stencilFail, stencilZFail, stencilZPass) {
        if (currentStencilFail !== stencilFail || currentStencilZFail !== stencilZFail || currentStencilZPass !== stencilZPass) {
          gl.stencilOp(stencilFail, stencilZFail, stencilZPass);
          currentStencilFail = stencilFail;
          currentStencilZFail = stencilZFail;
          currentStencilZPass = stencilZPass;
        }
      }, "setOp"),
      setLocked: /* @__PURE__ */ __name(function(lock) {
        locked = lock;
      }, "setLocked"),
      setClear: /* @__PURE__ */ __name(function(stencil) {
        if (currentStencilClear !== stencil) {
          gl.clearStencil(stencil);
          currentStencilClear = stencil;
        }
      }, "setClear"),
      reset: /* @__PURE__ */ __name(function() {
        locked = false;
        currentStencilMask = null;
        currentStencilFunc = null;
        currentStencilRef = null;
        currentStencilFuncMask = null;
        currentStencilFail = null;
        currentStencilZFail = null;
        currentStencilZPass = null;
        currentStencilClear = null;
      }, "reset")
    };
  }
  __name(StencilBuffer, "StencilBuffer");
  const colorBuffer = new ColorBuffer();
  const depthBuffer = new DepthBuffer();
  const stencilBuffer = new StencilBuffer();
  const uboBindings = /* @__PURE__ */ new WeakMap();
  const uboProgramMap = /* @__PURE__ */ new WeakMap();
  let enabledCapabilities = {};
  let currentBoundFramebuffers = {};
  let currentDrawbuffers = /* @__PURE__ */ new WeakMap();
  let defaultDrawbuffers = [];
  let currentProgram = null;
  let currentBlendingEnabled = false;
  let currentBlending = null;
  let currentBlendEquation = null;
  let currentBlendSrc = null;
  let currentBlendDst = null;
  let currentBlendEquationAlpha = null;
  let currentBlendSrcAlpha = null;
  let currentBlendDstAlpha = null;
  let currentBlendColor = new Color(0, 0, 0);
  let currentBlendAlpha = 0;
  let currentPremultipledAlpha = false;
  let currentFlipSided = null;
  let currentCullFace = null;
  let currentLineWidth = null;
  let currentPolygonOffsetFactor = null;
  let currentPolygonOffsetUnits = null;
  const maxTextures = gl.getParameter(gl.MAX_COMBINED_TEXTURE_IMAGE_UNITS);
  let lineWidthAvailable = false;
  let version = 0;
  const glVersion = gl.getParameter(gl.VERSION);
  if (glVersion.indexOf("WebGL") !== -1) {
    version = parseFloat(/^WebGL (\d)/.exec(glVersion)[1]);
    lineWidthAvailable = version >= 1;
  } else if (glVersion.indexOf("OpenGL ES") !== -1) {
    version = parseFloat(/^OpenGL ES (\d)/.exec(glVersion)[1]);
    lineWidthAvailable = version >= 2;
  }
  let currentTextureSlot = null;
  let currentBoundTextures = {};
  const scissorParam = gl.getParameter(gl.SCISSOR_BOX);
  const viewportParam = gl.getParameter(gl.VIEWPORT);
  const currentScissor = new Vector4().fromArray(scissorParam);
  const currentViewport = new Vector4().fromArray(viewportParam);
  function createTexture(type, target, count, dimensions) {
    const data = new Uint8Array(4);
    const texture = gl.createTexture();
    gl.bindTexture(type, texture);
    gl.texParameteri(type, gl.TEXTURE_MIN_FILTER, gl.NEAREST);
    gl.texParameteri(type, gl.TEXTURE_MAG_FILTER, gl.NEAREST);
    for (let i = 0; i < count; i++) {
      if (type === gl.TEXTURE_3D || type === gl.TEXTURE_2D_ARRAY) {
        gl.texImage3D(target, 0, gl.RGBA, 1, 1, dimensions, 0, gl.RGBA, gl.UNSIGNED_BYTE, data);
      } else {
        gl.texImage2D(target + i, 0, gl.RGBA, 1, 1, 0, gl.RGBA, gl.UNSIGNED_BYTE, data);
      }
    }
    return texture;
  }
  __name(createTexture, "createTexture");
  const emptyTextures = {};
  emptyTextures[gl.TEXTURE_2D] = createTexture(gl.TEXTURE_2D, gl.TEXTURE_2D, 1);
  emptyTextures[gl.TEXTURE_CUBE_MAP] = createTexture(gl.TEXTURE_CUBE_MAP, gl.TEXTURE_CUBE_MAP_POSITIVE_X, 6);
  emptyTextures[gl.TEXTURE_2D_ARRAY] = createTexture(gl.TEXTURE_2D_ARRAY, gl.TEXTURE_2D_ARRAY, 1, 1);
  emptyTextures[gl.TEXTURE_3D] = createTexture(gl.TEXTURE_3D, gl.TEXTURE_3D, 1, 1);
  colorBuffer.setClear(0, 0, 0, 1);
  depthBuffer.setClear(1);
  stencilBuffer.setClear(0);
  enable(gl.DEPTH_TEST);
  depthBuffer.setFunc(LessEqualDepth);
  setFlipSided(false);
  setCullFace(CullFaceBack);
  enable(gl.CULL_FACE);
  setBlending(NoBlending);
  function enable(id) {
    if (enabledCapabilities[id] !== true) {
      gl.enable(id);
      enabledCapabilities[id] = true;
    }
  }
  __name(enable, "enable");
  function disable(id) {
    if (enabledCapabilities[id] !== false) {
      gl.disable(id);
      enabledCapabilities[id] = false;
    }
  }
  __name(disable, "disable");
  function bindFramebuffer(target, framebuffer) {
    if (currentBoundFramebuffers[target] !== framebuffer) {
      gl.bindFramebuffer(target, framebuffer);
      currentBoundFramebuffers[target] = framebuffer;
      if (target === gl.DRAW_FRAMEBUFFER) {
        currentBoundFramebuffers[gl.FRAMEBUFFER] = framebuffer;
      }
      if (target === gl.FRAMEBUFFER) {
        currentBoundFramebuffers[gl.DRAW_FRAMEBUFFER] = framebuffer;
      }
      return true;
    }
    return false;
  }
  __name(bindFramebuffer, "bindFramebuffer");
  function drawBuffers(renderTarget, framebuffer) {
    let drawBuffers2 = defaultDrawbuffers;
    let needsUpdate = false;
    if (renderTarget) {
      drawBuffers2 = currentDrawbuffers.get(framebuffer);
      if (drawBuffers2 === void 0) {
        drawBuffers2 = [];
        currentDrawbuffers.set(framebuffer, drawBuffers2);
      }
      const textures = renderTarget.textures;
      if (drawBuffers2.length !== textures.length || drawBuffers2[0] !== gl.COLOR_ATTACHMENT0) {
        for (let i = 0, il = textures.length; i < il; i++) {
          drawBuffers2[i] = gl.COLOR_ATTACHMENT0 + i;
        }
        drawBuffers2.length = textures.length;
        needsUpdate = true;
      }
    } else {
      if (drawBuffers2[0] !== gl.BACK) {
        drawBuffers2[0] = gl.BACK;
        needsUpdate = true;
      }
    }
    if (needsUpdate) {
      gl.drawBuffers(drawBuffers2);
    }
  }
  __name(drawBuffers, "drawBuffers");
  function useProgram(program) {
    if (currentProgram !== program) {
      gl.useProgram(program);
      currentProgram = program;
      return true;
    }
    return false;
  }
  __name(useProgram, "useProgram");
  const equationToGL = {
    [AddEquation]: gl.FUNC_ADD,
    [SubtractEquation]: gl.FUNC_SUBTRACT,
    [ReverseSubtractEquation]: gl.FUNC_REVERSE_SUBTRACT
  };
  equationToGL[MinEquation] = gl.MIN;
  equationToGL[MaxEquation] = gl.MAX;
  const factorToGL = {
    [ZeroFactor]: gl.ZERO,
    [OneFactor]: gl.ONE,
    [SrcColorFactor]: gl.SRC_COLOR,
    [SrcAlphaFactor]: gl.SRC_ALPHA,
    [SrcAlphaSaturateFactor]: gl.SRC_ALPHA_SATURATE,
    [DstColorFactor]: gl.DST_COLOR,
    [DstAlphaFactor]: gl.DST_ALPHA,
    [OneMinusSrcColorFactor]: gl.ONE_MINUS_SRC_COLOR,
    [OneMinusSrcAlphaFactor]: gl.ONE_MINUS_SRC_ALPHA,
    [OneMinusDstColorFactor]: gl.ONE_MINUS_DST_COLOR,
    [OneMinusDstAlphaFactor]: gl.ONE_MINUS_DST_ALPHA,
    [ConstantColorFactor]: gl.CONSTANT_COLOR,
    [OneMinusConstantColorFactor]: gl.ONE_MINUS_CONSTANT_COLOR,
    [ConstantAlphaFactor]: gl.CONSTANT_ALPHA,
    [OneMinusConstantAlphaFactor]: gl.ONE_MINUS_CONSTANT_ALPHA
  };
  function setBlending(blending, blendEquation, blendSrc, blendDst, blendEquationAlpha, blendSrcAlpha, blendDstAlpha, blendColor, blendAlpha, premultipliedAlpha) {
    if (blending === NoBlending) {
      if (currentBlendingEnabled === true) {
        disable(gl.BLEND);
        currentBlendingEnabled = false;
      }
      return;
    }
    if (currentBlendingEnabled === false) {
      enable(gl.BLEND);
      currentBlendingEnabled = true;
    }
    if (blending !== CustomBlending) {
      if (blending !== currentBlending || premultipliedAlpha !== currentPremultipledAlpha) {
        if (currentBlendEquation !== AddEquation || currentBlendEquationAlpha !== AddEquation) {
          gl.blendEquation(gl.FUNC_ADD);
          currentBlendEquation = AddEquation;
          currentBlendEquationAlpha = AddEquation;
        }
        if (premultipliedAlpha) {
          switch (blending) {
            case NormalBlending:
              gl.blendFuncSeparate(gl.ONE, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
              break;
            case AdditiveBlending:
              gl.blendFunc(gl.ONE, gl.ONE);
              break;
            case SubtractiveBlending:
              gl.blendFuncSeparate(gl.ZERO, gl.ONE_MINUS_SRC_COLOR, gl.ZERO, gl.ONE);
              break;
            case MultiplyBlending:
              gl.blendFuncSeparate(gl.ZERO, gl.SRC_COLOR, gl.ZERO, gl.SRC_ALPHA);
              break;
            default:
              console.error("THREE.WebGLState: Invalid blending: ", blending);
              break;
          }
        } else {
          switch (blending) {
            case NormalBlending:
              gl.blendFuncSeparate(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA, gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
              break;
            case AdditiveBlending:
              gl.blendFunc(gl.SRC_ALPHA, gl.ONE);
              break;
            case SubtractiveBlending:
              gl.blendFuncSeparate(gl.ZERO, gl.ONE_MINUS_SRC_COLOR, gl.ZERO, gl.ONE);
              break;
            case MultiplyBlending:
              gl.blendFunc(gl.ZERO, gl.SRC_COLOR);
              break;
            default:
              console.error("THREE.WebGLState: Invalid blending: ", blending);
              break;
          }
        }
        currentBlendSrc = null;
        currentBlendDst = null;
        currentBlendSrcAlpha = null;
        currentBlendDstAlpha = null;
        currentBlendColor.set(0, 0, 0);
        currentBlendAlpha = 0;
        currentBlending = blending;
        currentPremultipledAlpha = premultipliedAlpha;
      }
      return;
    }
    blendEquationAlpha = blendEquationAlpha || blendEquation;
    blendSrcAlpha = blendSrcAlpha || blendSrc;
    blendDstAlpha = blendDstAlpha || blendDst;
    if (blendEquation !== currentBlendEquation || blendEquationAlpha !== currentBlendEquationAlpha) {
      gl.blendEquationSeparate(equationToGL[blendEquation], equationToGL[blendEquationAlpha]);
      currentBlendEquation = blendEquation;
      currentBlendEquationAlpha = blendEquationAlpha;
    }
    if (blendSrc !== currentBlendSrc || blendDst !== currentBlendDst || blendSrcAlpha !== currentBlendSrcAlpha || blendDstAlpha !== currentBlendDstAlpha) {
      gl.blendFuncSeparate(factorToGL[blendSrc], factorToGL[blendDst], factorToGL[blendSrcAlpha], factorToGL[blendDstAlpha]);
      currentBlendSrc = blendSrc;
      currentBlendDst = blendDst;
      currentBlendSrcAlpha = blendSrcAlpha;
      currentBlendDstAlpha = blendDstAlpha;
    }
    if (blendColor.equals(currentBlendColor) === false || blendAlpha !== currentBlendAlpha) {
      gl.blendColor(blendColor.r, blendColor.g, blendColor.b, blendAlpha);
      currentBlendColor.copy(blendColor);
      currentBlendAlpha = blendAlpha;
    }
    currentBlending = blending;
    currentPremultipledAlpha = false;
  }
  __name(setBlending, "setBlending");
  function setMaterial(material, frontFaceCW) {
    material.side === DoubleSide ? disable(gl.CULL_FACE) : enable(gl.CULL_FACE);
    let flipSided = material.side === BackSide;
    if (frontFaceCW) flipSided = !flipSided;
    setFlipSided(flipSided);
    material.blending === NormalBlending && material.transparent === false ? setBlending(NoBlending) : setBlending(material.blending, material.blendEquation, material.blendSrc, material.blendDst, material.blendEquationAlpha, material.blendSrcAlpha, material.blendDstAlpha, material.blendColor, material.blendAlpha, material.premultipliedAlpha);
    depthBuffer.setFunc(material.depthFunc);
    depthBuffer.setTest(material.depthTest);
    depthBuffer.setMask(material.depthWrite);
    colorBuffer.setMask(material.colorWrite);
    const stencilWrite = material.stencilWrite;
    stencilBuffer.setTest(stencilWrite);
    if (stencilWrite) {
      stencilBuffer.setMask(material.stencilWriteMask);
      stencilBuffer.setFunc(material.stencilFunc, material.stencilRef, material.stencilFuncMask);
      stencilBuffer.setOp(material.stencilFail, material.stencilZFail, material.stencilZPass);
    }
    setPolygonOffset(material.polygonOffset, material.polygonOffsetFactor, material.polygonOffsetUnits);
    material.alphaToCoverage === true ? enable(gl.SAMPLE_ALPHA_TO_COVERAGE) : disable(gl.SAMPLE_ALPHA_TO_COVERAGE);
  }
  __name(setMaterial, "setMaterial");
  function setFlipSided(flipSided) {
    if (currentFlipSided !== flipSided) {
      if (flipSided) {
        gl.frontFace(gl.CW);
      } else {
        gl.frontFace(gl.CCW);
      }
      currentFlipSided = flipSided;
    }
  }
  __name(setFlipSided, "setFlipSided");
  function setCullFace(cullFace) {
    if (cullFace !== CullFaceNone) {
      enable(gl.CULL_FACE);
      if (cullFace !== currentCullFace) {
        if (cullFace === CullFaceBack) {
          gl.cullFace(gl.BACK);
        } else if (cullFace === CullFaceFront) {
          gl.cullFace(gl.FRONT);
        } else {
          gl.cullFace(gl.FRONT_AND_BACK);
        }
      }
    } else {
      disable(gl.CULL_FACE);
    }
    currentCullFace = cullFace;
  }
  __name(setCullFace, "setCullFace");
  function setLineWidth(width) {
    if (width !== currentLineWidth) {
      if (lineWidthAvailable) gl.lineWidth(width);
      currentLineWidth = width;
    }
  }
  __name(setLineWidth, "setLineWidth");
  function setPolygonOffset(polygonOffset, factor, units) {
    if (polygonOffset) {
      enable(gl.POLYGON_OFFSET_FILL);
      if (currentPolygonOffsetFactor !== factor || currentPolygonOffsetUnits !== units) {
        gl.polygonOffset(factor, units);
        currentPolygonOffsetFactor = factor;
        currentPolygonOffsetUnits = units;
      }
    } else {
      disable(gl.POLYGON_OFFSET_FILL);
    }
  }
  __name(setPolygonOffset, "setPolygonOffset");
  function setScissorTest(scissorTest) {
    if (scissorTest) {
      enable(gl.SCISSOR_TEST);
    } else {
      disable(gl.SCISSOR_TEST);
    }
  }
  __name(setScissorTest, "setScissorTest");
  function activeTexture(webglSlot) {
    if (webglSlot === void 0) webglSlot = gl.TEXTURE0 + maxTextures - 1;
    if (currentTextureSlot !== webglSlot) {
      gl.activeTexture(webglSlot);
      currentTextureSlot = webglSlot;
    }
  }
  __name(activeTexture, "activeTexture");
  function bindTexture(webglType, webglTexture, webglSlot) {
    if (webglSlot === void 0) {
      if (currentTextureSlot === null) {
        webglSlot = gl.TEXTURE0 + maxTextures - 1;
      } else {
        webglSlot = currentTextureSlot;
      }
    }
    let boundTexture = currentBoundTextures[webglSlot];
    if (boundTexture === void 0) {
      boundTexture = { type: void 0, texture: void 0 };
      currentBoundTextures[webglSlot] = boundTexture;
    }
    if (boundTexture.type !== webglType || boundTexture.texture !== webglTexture) {
      if (currentTextureSlot !== webglSlot) {
        gl.activeTexture(webglSlot);
        currentTextureSlot = webglSlot;
      }
      gl.bindTexture(webglType, webglTexture || emptyTextures[webglType]);
      boundTexture.type = webglType;
      boundTexture.texture = webglTexture;
    }
  }
  __name(bindTexture, "bindTexture");
  function unbindTexture() {
    const boundTexture = currentBoundTextures[currentTextureSlot];
    if (boundTexture !== void 0 && boundTexture.type !== void 0) {
      gl.bindTexture(boundTexture.type, null);
      boundTexture.type = void 0;
      boundTexture.texture = void 0;
    }
  }
  __name(unbindTexture, "unbindTexture");
  function compressedTexImage2D() {
    try {
      gl.compressedTexImage2D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  __name(compressedTexImage2D, "compressedTexImage2D");
  function compressedTexImage3D() {
    try {
      gl.compressedTexImage3D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  __name(compressedTexImage3D, "compressedTexImage3D");
  function texSubImage2D() {
    try {
      gl.texSubImage2D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  __name(texSubImage2D, "texSubImage2D");
  function texSubImage3D() {
    try {
      gl.texSubImage3D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  __name(texSubImage3D, "texSubImage3D");
  function compressedTexSubImage2D() {
    try {
      gl.compressedTexSubImage2D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  __name(compressedTexSubImage2D, "compressedTexSubImage2D");
  function compressedTexSubImage3D() {
    try {
      gl.compressedTexSubImage3D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  __name(compressedTexSubImage3D, "compressedTexSubImage3D");
  function texStorage2D() {
    try {
      gl.texStorage2D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  __name(texStorage2D, "texStorage2D");
  function texStorage3D() {
    try {
      gl.texStorage3D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  __name(texStorage3D, "texStorage3D");
  function texImage2D() {
    try {
      gl.texImage2D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  __name(texImage2D, "texImage2D");
  function texImage3D() {
    try {
      gl.texImage3D.apply(gl, arguments);
    } catch (error) {
      console.error("THREE.WebGLState:", error);
    }
  }
  __name(texImage3D, "texImage3D");
  function scissor(scissor2) {
    if (currentScissor.equals(scissor2) === false) {
      gl.scissor(scissor2.x, scissor2.y, scissor2.z, scissor2.w);
      currentScissor.copy(scissor2);
    }
  }
  __name(scissor, "scissor");
  function viewport(viewport2) {
    if (currentViewport.equals(viewport2) === false) {
      gl.viewport(viewport2.x, viewport2.y, viewport2.z, viewport2.w);
      currentViewport.copy(viewport2);
    }
  }
  __name(viewport, "viewport");
  function updateUBOMapping(uniformsGroup, program) {
    let mapping = uboProgramMap.get(program);
    if (mapping === void 0) {
      mapping = /* @__PURE__ */ new WeakMap();
      uboProgramMap.set(program, mapping);
    }
    let blockIndex = mapping.get(uniformsGroup);
    if (blockIndex === void 0) {
      blockIndex = gl.getUniformBlockIndex(program, uniformsGroup.name);
      mapping.set(uniformsGroup, blockIndex);
    }
  }
  __name(updateUBOMapping, "updateUBOMapping");
  function uniformBlockBinding(uniformsGroup, program) {
    const mapping = uboProgramMap.get(program);
    const blockIndex = mapping.get(uniformsGroup);
    if (uboBindings.get(program) !== blockIndex) {
      gl.uniformBlockBinding(program, blockIndex, uniformsGroup.__bindingPointIndex);
      uboBindings.set(program, blockIndex);
    }
  }
  __name(uniformBlockBinding, "uniformBlockBinding");
  function reset() {
    gl.disable(gl.BLEND);
    gl.disable(gl.CULL_FACE);
    gl.disable(gl.DEPTH_TEST);
    gl.disable(gl.POLYGON_OFFSET_FILL);
    gl.disable(gl.SCISSOR_TEST);
    gl.disable(gl.STENCIL_TEST);
    gl.disable(gl.SAMPLE_ALPHA_TO_COVERAGE);
    gl.blendEquation(gl.FUNC_ADD);
    gl.blendFunc(gl.ONE, gl.ZERO);
    gl.blendFuncSeparate(gl.ONE, gl.ZERO, gl.ONE, gl.ZERO);
    gl.blendColor(0, 0, 0, 0);
    gl.colorMask(true, true, true, true);
    gl.clearColor(0, 0, 0, 0);
    gl.depthMask(true);
    gl.depthFunc(gl.LESS);
    depthBuffer.setReversed(false);
    gl.clearDepth(1);
    gl.stencilMask(4294967295);
    gl.stencilFunc(gl.ALWAYS, 0, 4294967295);
    gl.stencilOp(gl.KEEP, gl.KEEP, gl.KEEP);
    gl.clearStencil(0);
    gl.cullFace(gl.BACK);
    gl.frontFace(gl.CCW);
    gl.polygonOffset(0, 0);
    gl.activeTexture(gl.TEXTURE0);
    gl.bindFramebuffer(gl.FRAMEBUFFER, null);
    gl.bindFramebuffer(gl.DRAW_FRAMEBUFFER, null);
    gl.bindFramebuffer(gl.READ_FRAMEBUFFER, null);
    gl.useProgram(null);
    gl.lineWidth(1);
    gl.scissor(0, 0, gl.canvas.width, gl.canvas.height);
    gl.viewport(0, 0, gl.canvas.width, gl.canvas.height);
    enabledCapabilities = {};
    currentTextureSlot = null;
    currentBoundTextures = {};
    currentBoundFramebuffers = {};
    currentDrawbuffers = /* @__PURE__ */ new WeakMap();
    defaultDrawbuffers = [];
    currentProgram = null;
    currentBlendingEnabled = false;
    currentBlending = null;
    currentBlendEquation = null;
    currentBlendSrc = null;
    currentBlendDst = null;
    currentBlendEquationAlpha = null;
    currentBlendSrcAlpha = null;
    currentBlendDstAlpha = null;
    currentBlendColor = new Color(0, 0, 0);
    currentBlendAlpha = 0;
    currentPremultipledAlpha = false;
    currentFlipSided = null;
    currentCullFace = null;
    currentLineWidth = null;
    currentPolygonOffsetFactor = null;
    currentPolygonOffsetUnits = null;
    currentScissor.set(0, 0, gl.canvas.width, gl.canvas.height);
    currentViewport.set(0, 0, gl.canvas.width, gl.canvas.height);
    colorBuffer.reset();
    depthBuffer.reset();
    stencilBuffer.reset();
  }
  __name(reset, "reset");
  return {
    buffers: {
      color: colorBuffer,
      depth: depthBuffer,
      stencil: stencilBuffer
    },
    enable,
    disable,
    bindFramebuffer,
    drawBuffers,
    useProgram,
    setBlending,
    setMaterial,
    setFlipSided,
    setCullFace,
    setLineWidth,
    setPolygonOffset,
    setScissorTest,
    activeTexture,
    bindTexture,
    unbindTexture,
    compressedTexImage2D,
    compressedTexImage3D,
    texImage2D,
    texImage3D,
    updateUBOMapping,
    uniformBlockBinding,
    texStorage2D,
    texStorage3D,
    texSubImage2D,
    texSubImage3D,
    compressedTexSubImage2D,
    compressedTexSubImage3D,
    scissor,
    viewport,
    reset
  };
}
__name(WebGLState, "WebGLState");
function getByteLength(width, height, format, type) {
  const typeByteLength = getTextureTypeByteLength(type);
  switch (format) {
    // https://registry.khronos.org/OpenGL-Refpages/es3.0/html/glTexImage2D.xhtml
    case AlphaFormat:
      return width * height;
    case LuminanceFormat:
      return width * height;
    case LuminanceAlphaFormat:
      return width * height * 2;
    case RedFormat:
      return width * height / typeByteLength.components * typeByteLength.byteLength;
    case RedIntegerFormat:
      return width * height / typeByteLength.components * typeByteLength.byteLength;
    case RGFormat:
      return width * height * 2 / typeByteLength.components * typeByteLength.byteLength;
    case RGIntegerFormat:
      return width * height * 2 / typeByteLength.components * typeByteLength.byteLength;
    case RGBFormat:
      return width * height * 3 / typeByteLength.components * typeByteLength.byteLength;
    case RGBAFormat:
      return width * height * 4 / typeByteLength.components * typeByteLength.byteLength;
    case RGBAIntegerFormat:
      return width * height * 4 / typeByteLength.components * typeByteLength.byteLength;
    // https://registry.khronos.org/webgl/extensions/WEBGL_compressed_texture_s3tc_srgb/
    case RGB_S3TC_DXT1_Format:
    case RGBA_S3TC_DXT1_Format:
      return Math.floor((width + 3) / 4) * Math.floor((height + 3) / 4) * 8;
    case RGBA_S3TC_DXT3_Format:
    case RGBA_S3TC_DXT5_Format:
      return Math.floor((width + 3) / 4) * Math.floor((height + 3) / 4) * 16;
    // https://registry.khronos.org/webgl/extensions/WEBGL_compressed_texture_pvrtc/
    case RGB_PVRTC_2BPPV1_Format:
    case RGBA_PVRTC_2BPPV1_Format:
      return Math.max(width, 16) * Math.max(height, 8) / 4;
    case RGB_PVRTC_4BPPV1_Format:
    case RGBA_PVRTC_4BPPV1_Format:
      return Math.max(width, 8) * Math.max(height, 8) / 2;
    // https://registry.khronos.org/webgl/extensions/WEBGL_compressed_texture_etc/
    case RGB_ETC1_Format:
    case RGB_ETC2_Format:
      return Math.floor((width + 3) / 4) * Math.floor((height + 3) / 4) * 8;
    case RGBA_ETC2_EAC_Format:
      return Math.floor((width + 3) / 4) * Math.floor((height + 3) / 4) * 16;
    // https://registry.khronos.org/webgl/extensions/WEBGL_compressed_texture_astc/
    case RGBA_ASTC_4x4_Format:
      return Math.floor((width + 3) / 4) * Math.floor((height + 3) / 4) * 16;
    case RGBA_ASTC_5x4_Format:
      return Math.floor((width + 4) / 5) * Math.floor((height + 3) / 4) * 16;
    case RGBA_ASTC_5x5_Format:
      return Math.floor((width + 4) / 5) * Math.floor((height + 4) / 5) * 16;
    case RGBA_ASTC_6x5_Format:
      return Math.floor((width + 5) / 6) * Math.floor((height + 4) / 5) * 16;
    case RGBA_ASTC_6x6_Format:
      return Math.floor((width + 5) / 6) * Math.floor((height + 5) / 6) * 16;
    case RGBA_ASTC_8x5_Format:
      return Math.floor((width + 7) / 8) * Math.floor((height + 4) / 5) * 16;
    case RGBA_ASTC_8x6_Format:
      return Math.floor((width + 7) / 8) * Math.floor((height + 5) / 6) * 16;
    case RGBA_ASTC_8x8_Format:
      return Math.floor((width + 7) / 8) * Math.floor((height + 7) / 8) * 16;
    case RGBA_ASTC_10x5_Format:
      return Math.floor((width + 9) / 10) * Math.floor((height + 4) / 5) * 16;
    case RGBA_ASTC_10x6_Format:
      return Math.floor((width + 9) / 10) * Math.floor((height + 5) / 6) * 16;
    case RGBA_ASTC_10x8_Format:
      return Math.floor((width + 9) / 10) * Math.floor((height + 7) / 8) * 16;
    case RGBA_ASTC_10x10_Format:
      return Math.floor((width + 9) / 10) * Math.floor((height + 9) / 10) * 16;
    case RGBA_ASTC_12x10_Format:
      return Math.floor((width + 11) / 12) * Math.floor((height + 9) / 10) * 16;
    case RGBA_ASTC_12x12_Format:
      return Math.floor((width + 11) / 12) * Math.floor((height + 11) / 12) * 16;
    // https://registry.khronos.org/webgl/extensions/EXT_texture_compression_bptc/
    case RGBA_BPTC_Format:
    case RGB_BPTC_SIGNED_Format:
    case RGB_BPTC_UNSIGNED_Format:
      return Math.ceil(width / 4) * Math.ceil(height / 4) * 16;
    // https://registry.khronos.org/webgl/extensions/EXT_texture_compression_rgtc/
    case RED_RGTC1_Format:
    case SIGNED_RED_RGTC1_Format:
      return Math.ceil(width / 4) * Math.ceil(height / 4) * 8;
    case RED_GREEN_RGTC2_Format:
    case SIGNED_RED_GREEN_RGTC2_Format:
      return Math.ceil(width / 4) * Math.ceil(height / 4) * 16;
  }
  throw new Error(
    `Unable to determine texture byte length for ${format} format.`
  );
}
__name(getByteLength, "getByteLength");
function getTextureTypeByteLength(type) {
  switch (type) {
    case UnsignedByteType:
    case ByteType:
      return { byteLength: 1, components: 1 };
    case UnsignedShortType:
    case ShortType:
    case HalfFloatType:
      return { byteLength: 2, components: 1 };
    case UnsignedShort4444Type:
    case UnsignedShort5551Type:
      return { byteLength: 2, components: 4 };
    case UnsignedIntType:
    case IntType:
    case FloatType:
      return { byteLength: 4, components: 1 };
    case UnsignedInt5999Type:
      return { byteLength: 4, components: 3 };
  }
  throw new Error(`Unknown texture type ${type}.`);
}
__name(getTextureTypeByteLength, "getTextureTypeByteLength");
function WebGLTextures(_gl, extensions, state, properties, capabilities, utils, info) {
  const multisampledRTTExt = extensions.has("WEBGL_multisampled_render_to_texture") ? extensions.get("WEBGL_multisampled_render_to_texture") : null;
  const supportsInvalidateFramebuffer = typeof navigator === "undefined" ? false : /OculusBrowser/g.test(navigator.userAgent);
  const _imageDimensions = new Vector2();
  const _videoTextures = /* @__PURE__ */ new WeakMap();
  let _canvas2;
  const _sources = /* @__PURE__ */ new WeakMap();
  let useOffscreenCanvas = false;
  try {
    useOffscreenCanvas = typeof OffscreenCanvas !== "undefined" && new OffscreenCanvas(1, 1).getContext("2d") !== null;
  } catch (err2) {
  }
  function createCanvas(width, height) {
    return useOffscreenCanvas ? (
      // eslint-disable-next-line compat/compat
      new OffscreenCanvas(width, height)
    ) : createElementNS("canvas");
  }
  __name(createCanvas, "createCanvas");
  function resizeImage(image, needsNewCanvas, maxSize) {
    let scale = 1;
    const dimensions = getDimensions(image);
    if (dimensions.width > maxSize || dimensions.height > maxSize) {
      scale = maxSize / Math.max(dimensions.width, dimensions.height);
    }
    if (scale < 1) {
      if (typeof HTMLImageElement !== "undefined" && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== "undefined" && image instanceof HTMLCanvasElement || typeof ImageBitmap !== "undefined" && image instanceof ImageBitmap || typeof VideoFrame !== "undefined" && image instanceof VideoFrame) {
        const width = Math.floor(scale * dimensions.width);
        const height = Math.floor(scale * dimensions.height);
        if (_canvas2 === void 0) _canvas2 = createCanvas(width, height);
        const canvas = needsNewCanvas ? createCanvas(width, height) : _canvas2;
        canvas.width = width;
        canvas.height = height;
        const context = canvas.getContext("2d");
        context.drawImage(image, 0, 0, width, height);
        console.warn("THREE.WebGLRenderer: Texture has been resized from (" + dimensions.width + "x" + dimensions.height + ") to (" + width + "x" + height + ").");
        return canvas;
      } else {
        if ("data" in image) {
          console.warn("THREE.WebGLRenderer: Image in DataTexture is too big (" + dimensions.width + "x" + dimensions.height + ").");
        }
        return image;
      }
    }
    return image;
  }
  __name(resizeImage, "resizeImage");
  function textureNeedsGenerateMipmaps(texture) {
    return texture.generateMipmaps;
  }
  __name(textureNeedsGenerateMipmaps, "textureNeedsGenerateMipmaps");
  function generateMipmap(target) {
    _gl.generateMipmap(target);
  }
  __name(generateMipmap, "generateMipmap");
  function getTargetType(texture) {
    if (texture.isWebGLCubeRenderTarget) return _gl.TEXTURE_CUBE_MAP;
    if (texture.isWebGL3DRenderTarget) return _gl.TEXTURE_3D;
    if (texture.isWebGLArrayRenderTarget || texture.isCompressedArrayTexture) return _gl.TEXTURE_2D_ARRAY;
    return _gl.TEXTURE_2D;
  }
  __name(getTargetType, "getTargetType");
  function getInternalFormat(internalFormatName, glFormat, glType, colorSpace, forceLinearTransfer = false) {
    if (internalFormatName !== null) {
      if (_gl[internalFormatName] !== void 0) return _gl[internalFormatName];
      console.warn("THREE.WebGLRenderer: Attempt to use non-existing WebGL internal format '" + internalFormatName + "'");
    }
    let internalFormat = glFormat;
    if (glFormat === _gl.RED) {
      if (glType === _gl.FLOAT) internalFormat = _gl.R32F;
      if (glType === _gl.HALF_FLOAT) internalFormat = _gl.R16F;
      if (glType === _gl.UNSIGNED_BYTE) internalFormat = _gl.R8;
    }
    if (glFormat === _gl.RED_INTEGER) {
      if (glType === _gl.UNSIGNED_BYTE) internalFormat = _gl.R8UI;
      if (glType === _gl.UNSIGNED_SHORT) internalFormat = _gl.R16UI;
      if (glType === _gl.UNSIGNED_INT) internalFormat = _gl.R32UI;
      if (glType === _gl.BYTE) internalFormat = _gl.R8I;
      if (glType === _gl.SHORT) internalFormat = _gl.R16I;
      if (glType === _gl.INT) internalFormat = _gl.R32I;
    }
    if (glFormat === _gl.RG) {
      if (glType === _gl.FLOAT) internalFormat = _gl.RG32F;
      if (glType === _gl.HALF_FLOAT) internalFormat = _gl.RG16F;
      if (glType === _gl.UNSIGNED_BYTE) internalFormat = _gl.RG8;
    }
    if (glFormat === _gl.RG_INTEGER) {
      if (glType === _gl.UNSIGNED_BYTE) internalFormat = _gl.RG8UI;
      if (glType === _gl.UNSIGNED_SHORT) internalFormat = _gl.RG16UI;
      if (glType === _gl.UNSIGNED_INT) internalFormat = _gl.RG32UI;
      if (glType === _gl.BYTE) internalFormat = _gl.RG8I;
      if (glType === _gl.SHORT) internalFormat = _gl.RG16I;
      if (glType === _gl.INT) internalFormat = _gl.RG32I;
    }
    if (glFormat === _gl.RGB_INTEGER) {
      if (glType === _gl.UNSIGNED_BYTE) internalFormat = _gl.RGB8UI;
      if (glType === _gl.UNSIGNED_SHORT) internalFormat = _gl.RGB16UI;
      if (glType === _gl.UNSIGNED_INT) internalFormat = _gl.RGB32UI;
      if (glType === _gl.BYTE) internalFormat = _gl.RGB8I;
      if (glType === _gl.SHORT) internalFormat = _gl.RGB16I;
      if (glType === _gl.INT) internalFormat = _gl.RGB32I;
    }
    if (glFormat === _gl.RGBA_INTEGER) {
      if (glType === _gl.UNSIGNED_BYTE) internalFormat = _gl.RGBA8UI;
      if (glType === _gl.UNSIGNED_SHORT) internalFormat = _gl.RGBA16UI;
      if (glType === _gl.UNSIGNED_INT) internalFormat = _gl.RGBA32UI;
      if (glType === _gl.BYTE) internalFormat = _gl.RGBA8I;
      if (glType === _gl.SHORT) internalFormat = _gl.RGBA16I;
      if (glType === _gl.INT) internalFormat = _gl.RGBA32I;
    }
    if (glFormat === _gl.RGB) {
      if (glType === _gl.UNSIGNED_INT_5_9_9_9_REV) internalFormat = _gl.RGB9_E5;
    }
    if (glFormat === _gl.RGBA) {
      const transfer = forceLinearTransfer ? LinearTransfer : ColorManagement.getTransfer(colorSpace);
      if (glType === _gl.FLOAT) internalFormat = _gl.RGBA32F;
      if (glType === _gl.HALF_FLOAT) internalFormat = _gl.RGBA16F;
      if (glType === _gl.UNSIGNED_BYTE) internalFormat = transfer === SRGBTransfer ? _gl.SRGB8_ALPHA8 : _gl.RGBA8;
      if (glType === _gl.UNSIGNED_SHORT_4_4_4_4) internalFormat = _gl.RGBA4;
      if (glType === _gl.UNSIGNED_SHORT_5_5_5_1) internalFormat = _gl.RGB5_A1;
    }
    if (internalFormat === _gl.R16F || internalFormat === _gl.R32F || internalFormat === _gl.RG16F || internalFormat === _gl.RG32F || internalFormat === _gl.RGBA16F || internalFormat === _gl.RGBA32F) {
      extensions.get("EXT_color_buffer_float");
    }
    return internalFormat;
  }
  __name(getInternalFormat, "getInternalFormat");
  function getInternalDepthFormat(useStencil, depthType) {
    let glInternalFormat;
    if (useStencil) {
      if (depthType === null || depthType === UnsignedIntType || depthType === UnsignedInt248Type) {
        glInternalFormat = _gl.DEPTH24_STENCIL8;
      } else if (depthType === FloatType) {
        glInternalFormat = _gl.DEPTH32F_STENCIL8;
      } else if (depthType === UnsignedShortType) {
        glInternalFormat = _gl.DEPTH24_STENCIL8;
        console.warn("DepthTexture: 16 bit depth attachment is not supported with stencil. Using 24-bit attachment.");
      }
    } else {
      if (depthType === null || depthType === UnsignedIntType || depthType === UnsignedInt248Type) {
        glInternalFormat = _gl.DEPTH_COMPONENT24;
      } else if (depthType === FloatType) {
        glInternalFormat = _gl.DEPTH_COMPONENT32F;
      } else if (depthType === UnsignedShortType) {
        glInternalFormat = _gl.DEPTH_COMPONENT16;
      }
    }
    return glInternalFormat;
  }
  __name(getInternalDepthFormat, "getInternalDepthFormat");
  function getMipLevels(texture, image) {
    if (textureNeedsGenerateMipmaps(texture) === true || texture.isFramebufferTexture && texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter) {
      return Math.log2(Math.max(image.width, image.height)) + 1;
    } else if (texture.mipmaps !== void 0 && texture.mipmaps.length > 0) {
      return texture.mipmaps.length;
    } else if (texture.isCompressedTexture && Array.isArray(texture.image)) {
      return image.mipmaps.length;
    } else {
      return 1;
    }
  }
  __name(getMipLevels, "getMipLevels");
  function onTextureDispose(event) {
    const texture = event.target;
    texture.removeEventListener("dispose", onTextureDispose);
    deallocateTexture(texture);
    if (texture.isVideoTexture) {
      _videoTextures.delete(texture);
    }
  }
  __name(onTextureDispose, "onTextureDispose");
  function onRenderTargetDispose(event) {
    const renderTarget = event.target;
    renderTarget.removeEventListener("dispose", onRenderTargetDispose);
    deallocateRenderTarget(renderTarget);
  }
  __name(onRenderTargetDispose, "onRenderTargetDispose");
  function deallocateTexture(texture) {
    const textureProperties = properties.get(texture);
    if (textureProperties.__webglInit === void 0) return;
    const source = texture.source;
    const webglTextures = _sources.get(source);
    if (webglTextures) {
      const webglTexture = webglTextures[textureProperties.__cacheKey];
      webglTexture.usedTimes--;
      if (webglTexture.usedTimes === 0) {
        deleteTexture(texture);
      }
      if (Object.keys(webglTextures).length === 0) {
        _sources.delete(source);
      }
    }
    properties.remove(texture);
  }
  __name(deallocateTexture, "deallocateTexture");
  function deleteTexture(texture) {
    const textureProperties = properties.get(texture);
    _gl.deleteTexture(textureProperties.__webglTexture);
    const source = texture.source;
    const webglTextures = _sources.get(source);
    delete webglTextures[textureProperties.__cacheKey];
    info.memory.textures--;
  }
  __name(deleteTexture, "deleteTexture");
  function deallocateRenderTarget(renderTarget) {
    const renderTargetProperties = properties.get(renderTarget);
    if (renderTarget.depthTexture) {
      renderTarget.depthTexture.dispose();
      properties.remove(renderTarget.depthTexture);
    }
    if (renderTarget.isWebGLCubeRenderTarget) {
      for (let i = 0; i < 6; i++) {
        if (Array.isArray(renderTargetProperties.__webglFramebuffer[i])) {
          for (let level = 0; level < renderTargetProperties.__webglFramebuffer[i].length; level++) _gl.deleteFramebuffer(renderTargetProperties.__webglFramebuffer[i][level]);
        } else {
          _gl.deleteFramebuffer(renderTargetProperties.__webglFramebuffer[i]);
        }
        if (renderTargetProperties.__webglDepthbuffer) _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthbuffer[i]);
      }
    } else {
      if (Array.isArray(renderTargetProperties.__webglFramebuffer)) {
        for (let level = 0; level < renderTargetProperties.__webglFramebuffer.length; level++) _gl.deleteFramebuffer(renderTargetProperties.__webglFramebuffer[level]);
      } else {
        _gl.deleteFramebuffer(renderTargetProperties.__webglFramebuffer);
      }
      if (renderTargetProperties.__webglDepthbuffer) _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthbuffer);
      if (renderTargetProperties.__webglMultisampledFramebuffer) _gl.deleteFramebuffer(renderTargetProperties.__webglMultisampledFramebuffer);
      if (renderTargetProperties.__webglColorRenderbuffer) {
        for (let i = 0; i < renderTargetProperties.__webglColorRenderbuffer.length; i++) {
          if (renderTargetProperties.__webglColorRenderbuffer[i]) _gl.deleteRenderbuffer(renderTargetProperties.__webglColorRenderbuffer[i]);
        }
      }
      if (renderTargetProperties.__webglDepthRenderbuffer) _gl.deleteRenderbuffer(renderTargetProperties.__webglDepthRenderbuffer);
    }
    const textures = renderTarget.textures;
    for (let i = 0, il = textures.length; i < il; i++) {
      const attachmentProperties = properties.get(textures[i]);
      if (attachmentProperties.__webglTexture) {
        _gl.deleteTexture(attachmentProperties.__webglTexture);
        info.memory.textures--;
      }
      properties.remove(textures[i]);
    }
    properties.remove(renderTarget);
  }
  __name(deallocateRenderTarget, "deallocateRenderTarget");
  let textureUnits = 0;
  function resetTextureUnits() {
    textureUnits = 0;
  }
  __name(resetTextureUnits, "resetTextureUnits");
  function allocateTextureUnit() {
    const textureUnit = textureUnits;
    if (textureUnit >= capabilities.maxTextures) {
      console.warn("THREE.WebGLTextures: Trying to use " + textureUnit + " texture units while this GPU supports only " + capabilities.maxTextures);
    }
    textureUnits += 1;
    return textureUnit;
  }
  __name(allocateTextureUnit, "allocateTextureUnit");
  function getTextureCacheKey(texture) {
    const array = [];
    array.push(texture.wrapS);
    array.push(texture.wrapT);
    array.push(texture.wrapR || 0);
    array.push(texture.magFilter);
    array.push(texture.minFilter);
    array.push(texture.anisotropy);
    array.push(texture.internalFormat);
    array.push(texture.format);
    array.push(texture.type);
    array.push(texture.generateMipmaps);
    array.push(texture.premultiplyAlpha);
    array.push(texture.flipY);
    array.push(texture.unpackAlignment);
    array.push(texture.colorSpace);
    return array.join();
  }
  __name(getTextureCacheKey, "getTextureCacheKey");
  function setTexture2D(texture, slot) {
    const textureProperties = properties.get(texture);
    if (texture.isVideoTexture) updateVideoTexture(texture);
    if (texture.isRenderTargetTexture === false && texture.version > 0 && textureProperties.__version !== texture.version) {
      const image = texture.image;
      if (image === null) {
        console.warn("THREE.WebGLRenderer: Texture marked for update but no image data found.");
      } else if (image.complete === false) {
        console.warn("THREE.WebGLRenderer: Texture marked for update but image is incomplete");
      } else {
        uploadTexture(textureProperties, texture, slot);
        return;
      }
    }
    state.bindTexture(_gl.TEXTURE_2D, textureProperties.__webglTexture, _gl.TEXTURE0 + slot);
  }
  __name(setTexture2D, "setTexture2D");
  function setTexture2DArray(texture, slot) {
    const textureProperties = properties.get(texture);
    if (texture.version > 0 && textureProperties.__version !== texture.version) {
      uploadTexture(textureProperties, texture, slot);
      return;
    }
    state.bindTexture(_gl.TEXTURE_2D_ARRAY, textureProperties.__webglTexture, _gl.TEXTURE0 + slot);
  }
  __name(setTexture2DArray, "setTexture2DArray");
  function setTexture3D(texture, slot) {
    const textureProperties = properties.get(texture);
    if (texture.version > 0 && textureProperties.__version !== texture.version) {
      uploadTexture(textureProperties, texture, slot);
      return;
    }
    state.bindTexture(_gl.TEXTURE_3D, textureProperties.__webglTexture, _gl.TEXTURE0 + slot);
  }
  __name(setTexture3D, "setTexture3D");
  function setTextureCube(texture, slot) {
    const textureProperties = properties.get(texture);
    if (texture.version > 0 && textureProperties.__version !== texture.version) {
      uploadCubeTexture(textureProperties, texture, slot);
      return;
    }
    state.bindTexture(_gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture, _gl.TEXTURE0 + slot);
  }
  __name(setTextureCube, "setTextureCube");
  const wrappingToGL = {
    [RepeatWrapping]: _gl.REPEAT,
    [ClampToEdgeWrapping]: _gl.CLAMP_TO_EDGE,
    [MirroredRepeatWrapping]: _gl.MIRRORED_REPEAT
  };
  const filterToGL = {
    [NearestFilter]: _gl.NEAREST,
    [NearestMipmapNearestFilter]: _gl.NEAREST_MIPMAP_NEAREST,
    [NearestMipmapLinearFilter]: _gl.NEAREST_MIPMAP_LINEAR,
    [LinearFilter]: _gl.LINEAR,
    [LinearMipmapNearestFilter]: _gl.LINEAR_MIPMAP_NEAREST,
    [LinearMipmapLinearFilter]: _gl.LINEAR_MIPMAP_LINEAR
  };
  const compareToGL = {
    [NeverCompare]: _gl.NEVER,
    [AlwaysCompare]: _gl.ALWAYS,
    [LessCompare]: _gl.LESS,
    [LessEqualCompare]: _gl.LEQUAL,
    [EqualCompare]: _gl.EQUAL,
    [GreaterEqualCompare]: _gl.GEQUAL,
    [GreaterCompare]: _gl.GREATER,
    [NotEqualCompare]: _gl.NOTEQUAL
  };
  function setTextureParameters(textureType, texture) {
    if (texture.type === FloatType && extensions.has("OES_texture_float_linear") === false && (texture.magFilter === LinearFilter || texture.magFilter === LinearMipmapNearestFilter || texture.magFilter === NearestMipmapLinearFilter || texture.magFilter === LinearMipmapLinearFilter || texture.minFilter === LinearFilter || texture.minFilter === LinearMipmapNearestFilter || texture.minFilter === NearestMipmapLinearFilter || texture.minFilter === LinearMipmapLinearFilter)) {
      console.warn("THREE.WebGLRenderer: Unable to use linear filtering with floating point textures. OES_texture_float_linear not supported on this device.");
    }
    _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_S, wrappingToGL[texture.wrapS]);
    _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_T, wrappingToGL[texture.wrapT]);
    if (textureType === _gl.TEXTURE_3D || textureType === _gl.TEXTURE_2D_ARRAY) {
      _gl.texParameteri(textureType, _gl.TEXTURE_WRAP_R, wrappingToGL[texture.wrapR]);
    }
    _gl.texParameteri(textureType, _gl.TEXTURE_MAG_FILTER, filterToGL[texture.magFilter]);
    _gl.texParameteri(textureType, _gl.TEXTURE_MIN_FILTER, filterToGL[texture.minFilter]);
    if (texture.compareFunction) {
      _gl.texParameteri(textureType, _gl.TEXTURE_COMPARE_MODE, _gl.COMPARE_REF_TO_TEXTURE);
      _gl.texParameteri(textureType, _gl.TEXTURE_COMPARE_FUNC, compareToGL[texture.compareFunction]);
    }
    if (extensions.has("EXT_texture_filter_anisotropic") === true) {
      if (texture.magFilter === NearestFilter) return;
      if (texture.minFilter !== NearestMipmapLinearFilter && texture.minFilter !== LinearMipmapLinearFilter) return;
      if (texture.type === FloatType && extensions.has("OES_texture_float_linear") === false) return;
      if (texture.anisotropy > 1 || properties.get(texture).__currentAnisotropy) {
        const extension = extensions.get("EXT_texture_filter_anisotropic");
        _gl.texParameterf(textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min(texture.anisotropy, capabilities.getMaxAnisotropy()));
        properties.get(texture).__currentAnisotropy = texture.anisotropy;
      }
    }
  }
  __name(setTextureParameters, "setTextureParameters");
  function initTexture(textureProperties, texture) {
    let forceUpload = false;
    if (textureProperties.__webglInit === void 0) {
      textureProperties.__webglInit = true;
      texture.addEventListener("dispose", onTextureDispose);
    }
    const source = texture.source;
    let webglTextures = _sources.get(source);
    if (webglTextures === void 0) {
      webglTextures = {};
      _sources.set(source, webglTextures);
    }
    const textureCacheKey = getTextureCacheKey(texture);
    if (textureCacheKey !== textureProperties.__cacheKey) {
      if (webglTextures[textureCacheKey] === void 0) {
        webglTextures[textureCacheKey] = {
          texture: _gl.createTexture(),
          usedTimes: 0
        };
        info.memory.textures++;
        forceUpload = true;
      }
      webglTextures[textureCacheKey].usedTimes++;
      const webglTexture = webglTextures[textureProperties.__cacheKey];
      if (webglTexture !== void 0) {
        webglTextures[textureProperties.__cacheKey].usedTimes--;
        if (webglTexture.usedTimes === 0) {
          deleteTexture(texture);
        }
      }
      textureProperties.__cacheKey = textureCacheKey;
      textureProperties.__webglTexture = webglTextures[textureCacheKey].texture;
    }
    return forceUpload;
  }
  __name(initTexture, "initTexture");
  function uploadTexture(textureProperties, texture, slot) {
    let textureType = _gl.TEXTURE_2D;
    if (texture.isDataArrayTexture || texture.isCompressedArrayTexture) textureType = _gl.TEXTURE_2D_ARRAY;
    if (texture.isData3DTexture) textureType = _gl.TEXTURE_3D;
    const forceUpload = initTexture(textureProperties, texture);
    const source = texture.source;
    state.bindTexture(textureType, textureProperties.__webglTexture, _gl.TEXTURE0 + slot);
    const sourceProperties = properties.get(source);
    if (source.version !== sourceProperties.__version || forceUpload === true) {
      state.activeTexture(_gl.TEXTURE0 + slot);
      const workingPrimaries = ColorManagement.getPrimaries(ColorManagement.workingColorSpace);
      const texturePrimaries = texture.colorSpace === NoColorSpace ? null : ColorManagement.getPrimaries(texture.colorSpace);
      const unpackConversion = texture.colorSpace === NoColorSpace || workingPrimaries === texturePrimaries ? _gl.NONE : _gl.BROWSER_DEFAULT_WEBGL;
      _gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, texture.flipY);
      _gl.pixelStorei(_gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha);
      _gl.pixelStorei(_gl.UNPACK_ALIGNMENT, texture.unpackAlignment);
      _gl.pixelStorei(_gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, unpackConversion);
      let image = resizeImage(texture.image, false, capabilities.maxTextureSize);
      image = verifyColorSpace(texture, image);
      const glFormat = utils.convert(texture.format, texture.colorSpace);
      const glType = utils.convert(texture.type);
      let glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.colorSpace, texture.isVideoTexture);
      setTextureParameters(textureType, texture);
      let mipmap;
      const mipmaps = texture.mipmaps;
      const useTexStorage = texture.isVideoTexture !== true;
      const allocateMemory = sourceProperties.__version === void 0 || forceUpload === true;
      const dataReady = source.dataReady;
      const levels = getMipLevels(texture, image);
      if (texture.isDepthTexture) {
        glInternalFormat = getInternalDepthFormat(texture.format === DepthStencilFormat, texture.type);
        if (allocateMemory) {
          if (useTexStorage) {
            state.texStorage2D(_gl.TEXTURE_2D, 1, glInternalFormat, image.width, image.height);
          } else {
            state.texImage2D(_gl.TEXTURE_2D, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, null);
          }
        }
      } else if (texture.isDataTexture) {
        if (mipmaps.length > 0) {
          if (useTexStorage && allocateMemory) {
            state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, mipmaps[0].width, mipmaps[0].height);
          }
          for (let i = 0, il = mipmaps.length; i < il; i++) {
            mipmap = mipmaps[i];
            if (useTexStorage) {
              if (dataReady) {
                state.texSubImage2D(_gl.TEXTURE_2D, i, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data);
              }
            } else {
              state.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
            }
          }
          texture.generateMipmaps = false;
        } else {
          if (useTexStorage) {
            if (allocateMemory) {
              state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, image.width, image.height);
            }
            if (dataReady) {
              state.texSubImage2D(_gl.TEXTURE_2D, 0, 0, 0, image.width, image.height, glFormat, glType, image.data);
            }
          } else {
            state.texImage2D(_gl.TEXTURE_2D, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, image.data);
          }
        }
      } else if (texture.isCompressedTexture) {
        if (texture.isCompressedArrayTexture) {
          if (useTexStorage && allocateMemory) {
            state.texStorage3D(_gl.TEXTURE_2D_ARRAY, levels, glInternalFormat, mipmaps[0].width, mipmaps[0].height, image.depth);
          }
          for (let i = 0, il = mipmaps.length; i < il; i++) {
            mipmap = mipmaps[i];
            if (texture.format !== RGBAFormat) {
              if (glFormat !== null) {
                if (useTexStorage) {
                  if (dataReady) {
                    if (texture.layerUpdates.size > 0) {
                      const layerByteLength = getByteLength(mipmap.width, mipmap.height, texture.format, texture.type);
                      for (const layerIndex of texture.layerUpdates) {
                        const layerData = mipmap.data.subarray(
                          layerIndex * layerByteLength / mipmap.data.BYTES_PER_ELEMENT,
                          (layerIndex + 1) * layerByteLength / mipmap.data.BYTES_PER_ELEMENT
                        );
                        state.compressedTexSubImage3D(_gl.TEXTURE_2D_ARRAY, i, 0, 0, layerIndex, mipmap.width, mipmap.height, 1, glFormat, layerData);
                      }
                      texture.clearLayerUpdates();
                    } else {
                      state.compressedTexSubImage3D(_gl.TEXTURE_2D_ARRAY, i, 0, 0, 0, mipmap.width, mipmap.height, image.depth, glFormat, mipmap.data);
                    }
                  }
                } else {
                  state.compressedTexImage3D(_gl.TEXTURE_2D_ARRAY, i, glInternalFormat, mipmap.width, mipmap.height, image.depth, 0, mipmap.data, 0, 0);
                }
              } else {
                console.warn("THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()");
              }
            } else {
              if (useTexStorage) {
                if (dataReady) {
                  state.texSubImage3D(_gl.TEXTURE_2D_ARRAY, i, 0, 0, 0, mipmap.width, mipmap.height, image.depth, glFormat, glType, mipmap.data);
                }
              } else {
                state.texImage3D(_gl.TEXTURE_2D_ARRAY, i, glInternalFormat, mipmap.width, mipmap.height, image.depth, 0, glFormat, glType, mipmap.data);
              }
            }
          }
        } else {
          if (useTexStorage && allocateMemory) {
            state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, mipmaps[0].width, mipmaps[0].height);
          }
          for (let i = 0, il = mipmaps.length; i < il; i++) {
            mipmap = mipmaps[i];
            if (texture.format !== RGBAFormat) {
              if (glFormat !== null) {
                if (useTexStorage) {
                  if (dataReady) {
                    state.compressedTexSubImage2D(_gl.TEXTURE_2D, i, 0, 0, mipmap.width, mipmap.height, glFormat, mipmap.data);
                  }
                } else {
                  state.compressedTexImage2D(_gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data);
                }
              } else {
                console.warn("THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()");
              }
            } else {
              if (useTexStorage) {
                if (dataReady) {
                  state.texSubImage2D(_gl.TEXTURE_2D, i, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data);
                }
              } else {
                state.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
              }
            }
          }
        }
      } else if (texture.isDataArrayTexture) {
        if (useTexStorage) {
          if (allocateMemory) {
            state.texStorage3D(_gl.TEXTURE_2D_ARRAY, levels, glInternalFormat, image.width, image.height, image.depth);
          }
          if (dataReady) {
            if (texture.layerUpdates.size > 0) {
              const layerByteLength = getByteLength(image.width, image.height, texture.format, texture.type);
              for (const layerIndex of texture.layerUpdates) {
                const layerData = image.data.subarray(
                  layerIndex * layerByteLength / image.data.BYTES_PER_ELEMENT,
                  (layerIndex + 1) * layerByteLength / image.data.BYTES_PER_ELEMENT
                );
                state.texSubImage3D(_gl.TEXTURE_2D_ARRAY, 0, 0, 0, layerIndex, image.width, image.height, 1, glFormat, glType, layerData);
              }
              texture.clearLayerUpdates();
            } else {
              state.texSubImage3D(_gl.TEXTURE_2D_ARRAY, 0, 0, 0, 0, image.width, image.height, image.depth, glFormat, glType, image.data);
            }
          }
        } else {
          state.texImage3D(_gl.TEXTURE_2D_ARRAY, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data);
        }
      } else if (texture.isData3DTexture) {
        if (useTexStorage) {
          if (allocateMemory) {
            state.texStorage3D(_gl.TEXTURE_3D, levels, glInternalFormat, image.width, image.height, image.depth);
          }
          if (dataReady) {
            state.texSubImage3D(_gl.TEXTURE_3D, 0, 0, 0, 0, image.width, image.height, image.depth, glFormat, glType, image.data);
          }
        } else {
          state.texImage3D(_gl.TEXTURE_3D, 0, glInternalFormat, image.width, image.height, image.depth, 0, glFormat, glType, image.data);
        }
      } else if (texture.isFramebufferTexture) {
        if (allocateMemory) {
          if (useTexStorage) {
            state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, image.width, image.height);
          } else {
            let width = image.width, height = image.height;
            for (let i = 0; i < levels; i++) {
              state.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, width, height, 0, glFormat, glType, null);
              width >>= 1;
              height >>= 1;
            }
          }
        }
      } else {
        if (mipmaps.length > 0) {
          if (useTexStorage && allocateMemory) {
            const dimensions = getDimensions(mipmaps[0]);
            state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, dimensions.width, dimensions.height);
          }
          for (let i = 0, il = mipmaps.length; i < il; i++) {
            mipmap = mipmaps[i];
            if (useTexStorage) {
              if (dataReady) {
                state.texSubImage2D(_gl.TEXTURE_2D, i, 0, 0, glFormat, glType, mipmap);
              }
            } else {
              state.texImage2D(_gl.TEXTURE_2D, i, glInternalFormat, glFormat, glType, mipmap);
            }
          }
          texture.generateMipmaps = false;
        } else {
          if (useTexStorage) {
            if (allocateMemory) {
              const dimensions = getDimensions(image);
              state.texStorage2D(_gl.TEXTURE_2D, levels, glInternalFormat, dimensions.width, dimensions.height);
            }
            if (dataReady) {
              state.texSubImage2D(_gl.TEXTURE_2D, 0, 0, 0, glFormat, glType, image);
            }
          } else {
            state.texImage2D(_gl.TEXTURE_2D, 0, glInternalFormat, glFormat, glType, image);
          }
        }
      }
      if (textureNeedsGenerateMipmaps(texture)) {
        generateMipmap(textureType);
      }
      sourceProperties.__version = source.version;
      if (texture.onUpdate) texture.onUpdate(texture);
    }
    textureProperties.__version = texture.version;
  }
  __name(uploadTexture, "uploadTexture");
  function uploadCubeTexture(textureProperties, texture, slot) {
    if (texture.image.length !== 6) return;
    const forceUpload = initTexture(textureProperties, texture);
    const source = texture.source;
    state.bindTexture(_gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture, _gl.TEXTURE0 + slot);
    const sourceProperties = properties.get(source);
    if (source.version !== sourceProperties.__version || forceUpload === true) {
      state.activeTexture(_gl.TEXTURE0 + slot);
      const workingPrimaries = ColorManagement.getPrimaries(ColorManagement.workingColorSpace);
      const texturePrimaries = texture.colorSpace === NoColorSpace ? null : ColorManagement.getPrimaries(texture.colorSpace);
      const unpackConversion = texture.colorSpace === NoColorSpace || workingPrimaries === texturePrimaries ? _gl.NONE : _gl.BROWSER_DEFAULT_WEBGL;
      _gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, texture.flipY);
      _gl.pixelStorei(_gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha);
      _gl.pixelStorei(_gl.UNPACK_ALIGNMENT, texture.unpackAlignment);
      _gl.pixelStorei(_gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, unpackConversion);
      const isCompressed = texture.isCompressedTexture || texture.image[0].isCompressedTexture;
      const isDataTexture = texture.image[0] && texture.image[0].isDataTexture;
      const cubeImage = [];
      for (let i = 0; i < 6; i++) {
        if (!isCompressed && !isDataTexture) {
          cubeImage[i] = resizeImage(texture.image[i], true, capabilities.maxCubemapSize);
        } else {
          cubeImage[i] = isDataTexture ? texture.image[i].image : texture.image[i];
        }
        cubeImage[i] = verifyColorSpace(texture, cubeImage[i]);
      }
      const image = cubeImage[0], glFormat = utils.convert(texture.format, texture.colorSpace), glType = utils.convert(texture.type), glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.colorSpace);
      const useTexStorage = texture.isVideoTexture !== true;
      const allocateMemory = sourceProperties.__version === void 0 || forceUpload === true;
      const dataReady = source.dataReady;
      let levels = getMipLevels(texture, image);
      setTextureParameters(_gl.TEXTURE_CUBE_MAP, texture);
      let mipmaps;
      if (isCompressed) {
        if (useTexStorage && allocateMemory) {
          state.texStorage2D(_gl.TEXTURE_CUBE_MAP, levels, glInternalFormat, image.width, image.height);
        }
        for (let i = 0; i < 6; i++) {
          mipmaps = cubeImage[i].mipmaps;
          for (let j = 0; j < mipmaps.length; j++) {
            const mipmap = mipmaps[j];
            if (texture.format !== RGBAFormat) {
              if (glFormat !== null) {
                if (useTexStorage) {
                  if (dataReady) {
                    state.compressedTexSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, 0, 0, mipmap.width, mipmap.height, glFormat, mipmap.data);
                  }
                } else {
                  state.compressedTexImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data);
                }
              } else {
                console.warn("THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .setTextureCube()");
              }
            } else {
              if (useTexStorage) {
                if (dataReady) {
                  state.texSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data);
                }
              } else {
                state.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data);
              }
            }
          }
        }
      } else {
        mipmaps = texture.mipmaps;
        if (useTexStorage && allocateMemory) {
          if (mipmaps.length > 0) levels++;
          const dimensions = getDimensions(cubeImage[0]);
          state.texStorage2D(_gl.TEXTURE_CUBE_MAP, levels, glInternalFormat, dimensions.width, dimensions.height);
        }
        for (let i = 0; i < 6; i++) {
          if (isDataTexture) {
            if (useTexStorage) {
              if (dataReady) {
                state.texSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, 0, 0, cubeImage[i].width, cubeImage[i].height, glFormat, glType, cubeImage[i].data);
              }
            } else {
              state.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glInternalFormat, cubeImage[i].width, cubeImage[i].height, 0, glFormat, glType, cubeImage[i].data);
            }
            for (let j = 0; j < mipmaps.length; j++) {
              const mipmap = mipmaps[j];
              const mipmapImage = mipmap.image[i].image;
              if (useTexStorage) {
                if (dataReady) {
                  state.texSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j + 1, 0, 0, mipmapImage.width, mipmapImage.height, glFormat, glType, mipmapImage.data);
                }
              } else {
                state.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j + 1, glInternalFormat, mipmapImage.width, mipmapImage.height, 0, glFormat, glType, mipmapImage.data);
              }
            }
          } else {
            if (useTexStorage) {
              if (dataReady) {
                state.texSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, 0, 0, glFormat, glType, cubeImage[i]);
              }
            } else {
              state.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, glInternalFormat, glFormat, glType, cubeImage[i]);
            }
            for (let j = 0; j < mipmaps.length; j++) {
              const mipmap = mipmaps[j];
              if (useTexStorage) {
                if (dataReady) {
                  state.texSubImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j + 1, 0, 0, glFormat, glType, mipmap.image[i]);
                }
              } else {
                state.texImage2D(_gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, j + 1, glInternalFormat, glFormat, glType, mipmap.image[i]);
              }
            }
          }
        }
      }
      if (textureNeedsGenerateMipmaps(texture)) {
        generateMipmap(_gl.TEXTURE_CUBE_MAP);
      }
      sourceProperties.__version = source.version;
      if (texture.onUpdate) texture.onUpdate(texture);
    }
    textureProperties.__version = texture.version;
  }
  __name(uploadCubeTexture, "uploadCubeTexture");
  function setupFrameBufferTexture(framebuffer, renderTarget, texture, attachment, textureTarget, level) {
    const glFormat = utils.convert(texture.format, texture.colorSpace);
    const glType = utils.convert(texture.type);
    const glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.colorSpace);
    const renderTargetProperties = properties.get(renderTarget);
    const textureProperties = properties.get(texture);
    textureProperties.__renderTarget = renderTarget;
    if (!renderTargetProperties.__hasExternalTextures) {
      const width = Math.max(1, renderTarget.width >> level);
      const height = Math.max(1, renderTarget.height >> level);
      if (textureTarget === _gl.TEXTURE_3D || textureTarget === _gl.TEXTURE_2D_ARRAY) {
        state.texImage3D(textureTarget, level, glInternalFormat, width, height, renderTarget.depth, 0, glFormat, glType, null);
      } else {
        state.texImage2D(textureTarget, level, glInternalFormat, width, height, 0, glFormat, glType, null);
      }
    }
    state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);
    if (useMultisampledRTT(renderTarget)) {
      multisampledRTTExt.framebufferTexture2DMultisampleEXT(_gl.FRAMEBUFFER, attachment, textureTarget, textureProperties.__webglTexture, 0, getRenderTargetSamples(renderTarget));
    } else if (textureTarget === _gl.TEXTURE_2D || textureTarget >= _gl.TEXTURE_CUBE_MAP_POSITIVE_X && textureTarget <= _gl.TEXTURE_CUBE_MAP_NEGATIVE_Z) {
      _gl.framebufferTexture2D(_gl.FRAMEBUFFER, attachment, textureTarget, textureProperties.__webglTexture, level);
    }
    state.bindFramebuffer(_gl.FRAMEBUFFER, null);
  }
  __name(setupFrameBufferTexture, "setupFrameBufferTexture");
  function setupRenderBufferStorage(renderbuffer, renderTarget, isMultisample) {
    _gl.bindRenderbuffer(_gl.RENDERBUFFER, renderbuffer);
    if (renderTarget.depthBuffer) {
      const depthTexture = renderTarget.depthTexture;
      const depthType = depthTexture && depthTexture.isDepthTexture ? depthTexture.type : null;
      const glInternalFormat = getInternalDepthFormat(renderTarget.stencilBuffer, depthType);
      const glAttachmentType = renderTarget.stencilBuffer ? _gl.DEPTH_STENCIL_ATTACHMENT : _gl.DEPTH_ATTACHMENT;
      const samples = getRenderTargetSamples(renderTarget);
      const isUseMultisampledRTT = useMultisampledRTT(renderTarget);
      if (isUseMultisampledRTT) {
        multisampledRTTExt.renderbufferStorageMultisampleEXT(_gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height);
      } else if (isMultisample) {
        _gl.renderbufferStorageMultisample(_gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height);
      } else {
        _gl.renderbufferStorage(_gl.RENDERBUFFER, glInternalFormat, renderTarget.width, renderTarget.height);
      }
      _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, glAttachmentType, _gl.RENDERBUFFER, renderbuffer);
    } else {
      const textures = renderTarget.textures;
      for (let i = 0; i < textures.length; i++) {
        const texture = textures[i];
        const glFormat = utils.convert(texture.format, texture.colorSpace);
        const glType = utils.convert(texture.type);
        const glInternalFormat = getInternalFormat(texture.internalFormat, glFormat, glType, texture.colorSpace);
        const samples = getRenderTargetSamples(renderTarget);
        if (isMultisample && useMultisampledRTT(renderTarget) === false) {
          _gl.renderbufferStorageMultisample(_gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height);
        } else if (useMultisampledRTT(renderTarget)) {
          multisampledRTTExt.renderbufferStorageMultisampleEXT(_gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height);
        } else {
          _gl.renderbufferStorage(_gl.RENDERBUFFER, glInternalFormat, renderTarget.width, renderTarget.height);
        }
      }
    }
    _gl.bindRenderbuffer(_gl.RENDERBUFFER, null);
  }
  __name(setupRenderBufferStorage, "setupRenderBufferStorage");
  function setupDepthTexture(framebuffer, renderTarget) {
    const isCube = renderTarget && renderTarget.isWebGLCubeRenderTarget;
    if (isCube) throw new Error("Depth Texture with cube render targets is not supported");
    state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);
    if (!(renderTarget.depthTexture && renderTarget.depthTexture.isDepthTexture)) {
      throw new Error("renderTarget.depthTexture must be an instance of THREE.DepthTexture");
    }
    const textureProperties = properties.get(renderTarget.depthTexture);
    textureProperties.__renderTarget = renderTarget;
    if (!textureProperties.__webglTexture || renderTarget.depthTexture.image.width !== renderTarget.width || renderTarget.depthTexture.image.height !== renderTarget.height) {
      renderTarget.depthTexture.image.width = renderTarget.width;
      renderTarget.depthTexture.image.height = renderTarget.height;
      renderTarget.depthTexture.needsUpdate = true;
    }
    setTexture2D(renderTarget.depthTexture, 0);
    const webglDepthTexture = textureProperties.__webglTexture;
    const samples = getRenderTargetSamples(renderTarget);
    if (renderTarget.depthTexture.format === DepthFormat) {
      if (useMultisampledRTT(renderTarget)) {
        multisampledRTTExt.framebufferTexture2DMultisampleEXT(_gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0, samples);
      } else {
        _gl.framebufferTexture2D(_gl.FRAMEBUFFER, _gl.DEPTH_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0);
      }
    } else if (renderTarget.depthTexture.format === DepthStencilFormat) {
      if (useMultisampledRTT(renderTarget)) {
        multisampledRTTExt.framebufferTexture2DMultisampleEXT(_gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0, samples);
      } else {
        _gl.framebufferTexture2D(_gl.FRAMEBUFFER, _gl.DEPTH_STENCIL_ATTACHMENT, _gl.TEXTURE_2D, webglDepthTexture, 0);
      }
    } else {
      throw new Error("Unknown depthTexture format");
    }
  }
  __name(setupDepthTexture, "setupDepthTexture");
  function setupDepthRenderbuffer(renderTarget) {
    const renderTargetProperties = properties.get(renderTarget);
    const isCube = renderTarget.isWebGLCubeRenderTarget === true;
    if (renderTargetProperties.__boundDepthTexture !== renderTarget.depthTexture) {
      const depthTexture = renderTarget.depthTexture;
      if (renderTargetProperties.__depthDisposeCallback) {
        renderTargetProperties.__depthDisposeCallback();
      }
      if (depthTexture) {
        const disposeEvent = /* @__PURE__ */ __name(() => {
          delete renderTargetProperties.__boundDepthTexture;
          delete renderTargetProperties.__depthDisposeCallback;
          depthTexture.removeEventListener("dispose", disposeEvent);
        }, "disposeEvent");
        depthTexture.addEventListener("dispose", disposeEvent);
        renderTargetProperties.__depthDisposeCallback = disposeEvent;
      }
      renderTargetProperties.__boundDepthTexture = depthTexture;
    }
    if (renderTarget.depthTexture && !renderTargetProperties.__autoAllocateDepthBuffer) {
      if (isCube) throw new Error("target.depthTexture not supported in Cube render targets");
      setupDepthTexture(renderTargetProperties.__webglFramebuffer, renderTarget);
    } else {
      if (isCube) {
        renderTargetProperties.__webglDepthbuffer = [];
        for (let i = 0; i < 6; i++) {
          state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer[i]);
          if (renderTargetProperties.__webglDepthbuffer[i] === void 0) {
            renderTargetProperties.__webglDepthbuffer[i] = _gl.createRenderbuffer();
            setupRenderBufferStorage(renderTargetProperties.__webglDepthbuffer[i], renderTarget, false);
          } else {
            const glAttachmentType = renderTarget.stencilBuffer ? _gl.DEPTH_STENCIL_ATTACHMENT : _gl.DEPTH_ATTACHMENT;
            const renderbuffer = renderTargetProperties.__webglDepthbuffer[i];
            _gl.bindRenderbuffer(_gl.RENDERBUFFER, renderbuffer);
            _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, glAttachmentType, _gl.RENDERBUFFER, renderbuffer);
          }
        }
      } else {
        state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer);
        if (renderTargetProperties.__webglDepthbuffer === void 0) {
          renderTargetProperties.__webglDepthbuffer = _gl.createRenderbuffer();
          setupRenderBufferStorage(renderTargetProperties.__webglDepthbuffer, renderTarget, false);
        } else {
          const glAttachmentType = renderTarget.stencilBuffer ? _gl.DEPTH_STENCIL_ATTACHMENT : _gl.DEPTH_ATTACHMENT;
          const renderbuffer = renderTargetProperties.__webglDepthbuffer;
          _gl.bindRenderbuffer(_gl.RENDERBUFFER, renderbuffer);
          _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, glAttachmentType, _gl.RENDERBUFFER, renderbuffer);
        }
      }
    }
    state.bindFramebuffer(_gl.FRAMEBUFFER, null);
  }
  __name(setupDepthRenderbuffer, "setupDepthRenderbuffer");
  function rebindTextures(renderTarget, colorTexture, depthTexture) {
    const renderTargetProperties = properties.get(renderTarget);
    if (colorTexture !== void 0) {
      setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer, renderTarget, renderTarget.texture, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_2D, 0);
    }
    if (depthTexture !== void 0) {
      setupDepthRenderbuffer(renderTarget);
    }
  }
  __name(rebindTextures, "rebindTextures");
  function setupRenderTarget(renderTarget) {
    const texture = renderTarget.texture;
    const renderTargetProperties = properties.get(renderTarget);
    const textureProperties = properties.get(texture);
    renderTarget.addEventListener("dispose", onRenderTargetDispose);
    const textures = renderTarget.textures;
    const isCube = renderTarget.isWebGLCubeRenderTarget === true;
    const isMultipleRenderTargets = textures.length > 1;
    if (!isMultipleRenderTargets) {
      if (textureProperties.__webglTexture === void 0) {
        textureProperties.__webglTexture = _gl.createTexture();
      }
      textureProperties.__version = texture.version;
      info.memory.textures++;
    }
    if (isCube) {
      renderTargetProperties.__webglFramebuffer = [];
      for (let i = 0; i < 6; i++) {
        if (texture.mipmaps && texture.mipmaps.length > 0) {
          renderTargetProperties.__webglFramebuffer[i] = [];
          for (let level = 0; level < texture.mipmaps.length; level++) {
            renderTargetProperties.__webglFramebuffer[i][level] = _gl.createFramebuffer();
          }
        } else {
          renderTargetProperties.__webglFramebuffer[i] = _gl.createFramebuffer();
        }
      }
    } else {
      if (texture.mipmaps && texture.mipmaps.length > 0) {
        renderTargetProperties.__webglFramebuffer = [];
        for (let level = 0; level < texture.mipmaps.length; level++) {
          renderTargetProperties.__webglFramebuffer[level] = _gl.createFramebuffer();
        }
      } else {
        renderTargetProperties.__webglFramebuffer = _gl.createFramebuffer();
      }
      if (isMultipleRenderTargets) {
        for (let i = 0, il = textures.length; i < il; i++) {
          const attachmentProperties = properties.get(textures[i]);
          if (attachmentProperties.__webglTexture === void 0) {
            attachmentProperties.__webglTexture = _gl.createTexture();
            info.memory.textures++;
          }
        }
      }
      if (renderTarget.samples > 0 && useMultisampledRTT(renderTarget) === false) {
        renderTargetProperties.__webglMultisampledFramebuffer = _gl.createFramebuffer();
        renderTargetProperties.__webglColorRenderbuffer = [];
        state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglMultisampledFramebuffer);
        for (let i = 0; i < textures.length; i++) {
          const texture2 = textures[i];
          renderTargetProperties.__webglColorRenderbuffer[i] = _gl.createRenderbuffer();
          _gl.bindRenderbuffer(_gl.RENDERBUFFER, renderTargetProperties.__webglColorRenderbuffer[i]);
          const glFormat = utils.convert(texture2.format, texture2.colorSpace);
          const glType = utils.convert(texture2.type);
          const glInternalFormat = getInternalFormat(texture2.internalFormat, glFormat, glType, texture2.colorSpace, renderTarget.isXRRenderTarget === true);
          const samples = getRenderTargetSamples(renderTarget);
          _gl.renderbufferStorageMultisample(_gl.RENDERBUFFER, samples, glInternalFormat, renderTarget.width, renderTarget.height);
          _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.RENDERBUFFER, renderTargetProperties.__webglColorRenderbuffer[i]);
        }
        _gl.bindRenderbuffer(_gl.RENDERBUFFER, null);
        if (renderTarget.depthBuffer) {
          renderTargetProperties.__webglDepthRenderbuffer = _gl.createRenderbuffer();
          setupRenderBufferStorage(renderTargetProperties.__webglDepthRenderbuffer, renderTarget, true);
        }
        state.bindFramebuffer(_gl.FRAMEBUFFER, null);
      }
    }
    if (isCube) {
      state.bindTexture(_gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture);
      setTextureParameters(_gl.TEXTURE_CUBE_MAP, texture);
      for (let i = 0; i < 6; i++) {
        if (texture.mipmaps && texture.mipmaps.length > 0) {
          for (let level = 0; level < texture.mipmaps.length; level++) {
            setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer[i][level], renderTarget, texture, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, level);
          }
        } else {
          setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer[i], renderTarget, texture, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + i, 0);
        }
      }
      if (textureNeedsGenerateMipmaps(texture)) {
        generateMipmap(_gl.TEXTURE_CUBE_MAP);
      }
      state.unbindTexture();
    } else if (isMultipleRenderTargets) {
      for (let i = 0, il = textures.length; i < il; i++) {
        const attachment = textures[i];
        const attachmentProperties = properties.get(attachment);
        state.bindTexture(_gl.TEXTURE_2D, attachmentProperties.__webglTexture);
        setTextureParameters(_gl.TEXTURE_2D, attachment);
        setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer, renderTarget, attachment, _gl.COLOR_ATTACHMENT0 + i, _gl.TEXTURE_2D, 0);
        if (textureNeedsGenerateMipmaps(attachment)) {
          generateMipmap(_gl.TEXTURE_2D);
        }
      }
      state.unbindTexture();
    } else {
      let glTextureType = _gl.TEXTURE_2D;
      if (renderTarget.isWebGL3DRenderTarget || renderTarget.isWebGLArrayRenderTarget) {
        glTextureType = renderTarget.isWebGL3DRenderTarget ? _gl.TEXTURE_3D : _gl.TEXTURE_2D_ARRAY;
      }
      state.bindTexture(glTextureType, textureProperties.__webglTexture);
      setTextureParameters(glTextureType, texture);
      if (texture.mipmaps && texture.mipmaps.length > 0) {
        for (let level = 0; level < texture.mipmaps.length; level++) {
          setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer[level], renderTarget, texture, _gl.COLOR_ATTACHMENT0, glTextureType, level);
        }
      } else {
        setupFrameBufferTexture(renderTargetProperties.__webglFramebuffer, renderTarget, texture, _gl.COLOR_ATTACHMENT0, glTextureType, 0);
      }
      if (textureNeedsGenerateMipmaps(texture)) {
        generateMipmap(glTextureType);
      }
      state.unbindTexture();
    }
    if (renderTarget.depthBuffer) {
      setupDepthRenderbuffer(renderTarget);
    }
  }
  __name(setupRenderTarget, "setupRenderTarget");
  function updateRenderTargetMipmap(renderTarget) {
    const textures = renderTarget.textures;
    for (let i = 0, il = textures.length; i < il; i++) {
      const texture = textures[i];
      if (textureNeedsGenerateMipmaps(texture)) {
        const targetType = getTargetType(renderTarget);
        const webglTexture = properties.get(texture).__webglTexture;
        state.bindTexture(targetType, webglTexture);
        generateMipmap(targetType);
        state.unbindTexture();
      }
    }
  }
  __name(updateRenderTargetMipmap, "updateRenderTargetMipmap");
  const invalidationArrayRead = [];
  const invalidationArrayDraw = [];
  function updateMultisampleRenderTarget(renderTarget) {
    if (renderTarget.samples > 0) {
      if (useMultisampledRTT(renderTarget) === false) {
        const textures = renderTarget.textures;
        const width = renderTarget.width;
        const height = renderTarget.height;
        let mask = _gl.COLOR_BUFFER_BIT;
        const depthStyle = renderTarget.stencilBuffer ? _gl.DEPTH_STENCIL_ATTACHMENT : _gl.DEPTH_ATTACHMENT;
        const renderTargetProperties = properties.get(renderTarget);
        const isMultipleRenderTargets = textures.length > 1;
        if (isMultipleRenderTargets) {
          for (let i = 0; i < textures.length; i++) {
            state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglMultisampledFramebuffer);
            _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.RENDERBUFFER, null);
            state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer);
            _gl.framebufferTexture2D(_gl.DRAW_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.TEXTURE_2D, null, 0);
          }
        }
        state.bindFramebuffer(_gl.READ_FRAMEBUFFER, renderTargetProperties.__webglMultisampledFramebuffer);
        state.bindFramebuffer(_gl.DRAW_FRAMEBUFFER, renderTargetProperties.__webglFramebuffer);
        for (let i = 0; i < textures.length; i++) {
          if (renderTarget.resolveDepthBuffer) {
            if (renderTarget.depthBuffer) mask |= _gl.DEPTH_BUFFER_BIT;
            if (renderTarget.stencilBuffer && renderTarget.resolveStencilBuffer) mask |= _gl.STENCIL_BUFFER_BIT;
          }
          if (isMultipleRenderTargets) {
            _gl.framebufferRenderbuffer(_gl.READ_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.RENDERBUFFER, renderTargetProperties.__webglColorRenderbuffer[i]);
            const webglTexture = properties.get(textures[i]).__webglTexture;
            _gl.framebufferTexture2D(_gl.DRAW_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_2D, webglTexture, 0);
          }
          _gl.blitFramebuffer(0, 0, width, height, 0, 0, width, height, mask, _gl.NEAREST);
          if (supportsInvalidateFramebuffer === true) {
            invalidationArrayRead.length = 0;
            invalidationArrayDraw.length = 0;
            invalidationArrayRead.push(_gl.COLOR_ATTACHMENT0 + i);
            if (renderTarget.depthBuffer && renderTarget.resolveDepthBuffer === false) {
              invalidationArrayRead.push(depthStyle);
              invalidationArrayDraw.push(depthStyle);
              _gl.invalidateFramebuffer(_gl.DRAW_FRAMEBUFFER, invalidationArrayDraw);
            }
            _gl.invalidateFramebuffer(_gl.READ_FRAMEBUFFER, invalidationArrayRead);
          }
        }
        state.bindFramebuffer(_gl.READ_FRAMEBUFFER, null);
        state.bindFramebuffer(_gl.DRAW_FRAMEBUFFER, null);
        if (isMultipleRenderTargets) {
          for (let i = 0; i < textures.length; i++) {
            state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglMultisampledFramebuffer);
            _gl.framebufferRenderbuffer(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.RENDERBUFFER, renderTargetProperties.__webglColorRenderbuffer[i]);
            const webglTexture = properties.get(textures[i]).__webglTexture;
            state.bindFramebuffer(_gl.FRAMEBUFFER, renderTargetProperties.__webglFramebuffer);
            _gl.framebufferTexture2D(_gl.DRAW_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0 + i, _gl.TEXTURE_2D, webglTexture, 0);
          }
        }
        state.bindFramebuffer(_gl.DRAW_FRAMEBUFFER, renderTargetProperties.__webglMultisampledFramebuffer);
      } else {
        if (renderTarget.depthBuffer && renderTarget.resolveDepthBuffer === false && supportsInvalidateFramebuffer) {
          const depthStyle = renderTarget.stencilBuffer ? _gl.DEPTH_STENCIL_ATTACHMENT : _gl.DEPTH_ATTACHMENT;
          _gl.invalidateFramebuffer(_gl.DRAW_FRAMEBUFFER, [depthStyle]);
        }
      }
    }
  }
  __name(updateMultisampleRenderTarget, "updateMultisampleRenderTarget");
  function getRenderTargetSamples(renderTarget) {
    return Math.min(capabilities.maxSamples, renderTarget.samples);
  }
  __name(getRenderTargetSamples, "getRenderTargetSamples");
  function useMultisampledRTT(renderTarget) {
    const renderTargetProperties = properties.get(renderTarget);
    return renderTarget.samples > 0 && extensions.has("WEBGL_multisampled_render_to_texture") === true && renderTargetProperties.__useRenderToTexture !== false;
  }
  __name(useMultisampledRTT, "useMultisampledRTT");
  function updateVideoTexture(texture) {
    const frame = info.render.frame;
    if (_videoTextures.get(texture) !== frame) {
      _videoTextures.set(texture, frame);
      texture.update();
    }
  }
  __name(updateVideoTexture, "updateVideoTexture");
  function verifyColorSpace(texture, image) {
    const colorSpace = texture.colorSpace;
    const format = texture.format;
    const type = texture.type;
    if (texture.isCompressedTexture === true || texture.isVideoTexture === true) return image;
    if (colorSpace !== LinearSRGBColorSpace && colorSpace !== NoColorSpace) {
      if (ColorManagement.getTransfer(colorSpace) === SRGBTransfer) {
        if (format !== RGBAFormat || type !== UnsignedByteType) {
          console.warn("THREE.WebGLTextures: sRGB encoded textures have to use RGBAFormat and UnsignedByteType.");
        }
      } else {
        console.error("THREE.WebGLTextures: Unsupported texture color space:", colorSpace);
      }
    }
    return image;
  }
  __name(verifyColorSpace, "verifyColorSpace");
  function getDimensions(image) {
    if (typeof HTMLImageElement !== "undefined" && image instanceof HTMLImageElement) {
      _imageDimensions.width = image.naturalWidth || image.width;
      _imageDimensions.height = image.naturalHeight || image.height;
    } else if (typeof VideoFrame !== "undefined" && image instanceof VideoFrame) {
      _imageDimensions.width = image.displayWidth;
      _imageDimensions.height = image.displayHeight;
    } else {
      _imageDimensions.width = image.width;
      _imageDimensions.height = image.height;
    }
    return _imageDimensions;
  }
  __name(getDimensions, "getDimensions");
  this.allocateTextureUnit = allocateTextureUnit;
  this.resetTextureUnits = resetTextureUnits;
  this.setTexture2D = setTexture2D;
  this.setTexture2DArray = setTexture2DArray;
  this.setTexture3D = setTexture3D;
  this.setTextureCube = setTextureCube;
  this.rebindTextures = rebindTextures;
  this.setupRenderTarget = setupRenderTarget;
  this.updateRenderTargetMipmap = updateRenderTargetMipmap;
  this.updateMultisampleRenderTarget = updateMultisampleRenderTarget;
  this.setupDepthRenderbuffer = setupDepthRenderbuffer;
  this.setupFrameBufferTexture = setupFrameBufferTexture;
  this.useMultisampledRTT = useMultisampledRTT;
}
__name(WebGLTextures, "WebGLTextures");
function WebGLUtils(gl, extensions) {
  function convert(p, colorSpace = NoColorSpace) {
    let extension;
    const transfer = ColorManagement.getTransfer(colorSpace);
    if (p === UnsignedByteType) return gl.UNSIGNED_BYTE;
    if (p === UnsignedShort4444Type) return gl.UNSIGNED_SHORT_4_4_4_4;
    if (p === UnsignedShort5551Type) return gl.UNSIGNED_SHORT_5_5_5_1;
    if (p === UnsignedInt5999Type) return gl.UNSIGNED_INT_5_9_9_9_REV;
    if (p === ByteType) return gl.BYTE;
    if (p === ShortType) return gl.SHORT;
    if (p === UnsignedShortType) return gl.UNSIGNED_SHORT;
    if (p === IntType) return gl.INT;
    if (p === UnsignedIntType) return gl.UNSIGNED_INT;
    if (p === FloatType) return gl.FLOAT;
    if (p === HalfFloatType) return gl.HALF_FLOAT;
    if (p === AlphaFormat) return gl.ALPHA;
    if (p === RGBFormat) return gl.RGB;
    if (p === RGBAFormat) return gl.RGBA;
    if (p === LuminanceFormat) return gl.LUMINANCE;
    if (p === LuminanceAlphaFormat) return gl.LUMINANCE_ALPHA;
    if (p === DepthFormat) return gl.DEPTH_COMPONENT;
    if (p === DepthStencilFormat) return gl.DEPTH_STENCIL;
    if (p === RedFormat) return gl.RED;
    if (p === RedIntegerFormat) return gl.RED_INTEGER;
    if (p === RGFormat) return gl.RG;
    if (p === RGIntegerFormat) return gl.RG_INTEGER;
    if (p === RGBAIntegerFormat) return gl.RGBA_INTEGER;
    if (p === RGB_S3TC_DXT1_Format || p === RGBA_S3TC_DXT1_Format || p === RGBA_S3TC_DXT3_Format || p === RGBA_S3TC_DXT5_Format) {
      if (transfer === SRGBTransfer) {
        extension = extensions.get("WEBGL_compressed_texture_s3tc_srgb");
        if (extension !== null) {
          if (p === RGB_S3TC_DXT1_Format) return extension.COMPRESSED_SRGB_S3TC_DXT1_EXT;
          if (p === RGBA_S3TC_DXT1_Format) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT;
          if (p === RGBA_S3TC_DXT3_Format) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT;
          if (p === RGBA_S3TC_DXT5_Format) return extension.COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT;
        } else {
          return null;
        }
      } else {
        extension = extensions.get("WEBGL_compressed_texture_s3tc");
        if (extension !== null) {
          if (p === RGB_S3TC_DXT1_Format) return extension.COMPRESSED_RGB_S3TC_DXT1_EXT;
          if (p === RGBA_S3TC_DXT1_Format) return extension.COMPRESSED_RGBA_S3TC_DXT1_EXT;
          if (p === RGBA_S3TC_DXT3_Format) return extension.COMPRESSED_RGBA_S3TC_DXT3_EXT;
          if (p === RGBA_S3TC_DXT5_Format) return extension.COMPRESSED_RGBA_S3TC_DXT5_EXT;
        } else {
          return null;
        }
      }
    }
    if (p === RGB_PVRTC_4BPPV1_Format || p === RGB_PVRTC_2BPPV1_Format || p === RGBA_PVRTC_4BPPV1_Format || p === RGBA_PVRTC_2BPPV1_Format) {
      extension = extensions.get("WEBGL_compressed_texture_pvrtc");
      if (extension !== null) {
        if (p === RGB_PVRTC_4BPPV1_Format) return extension.COMPRESSED_RGB_PVRTC_4BPPV1_IMG;
        if (p === RGB_PVRTC_2BPPV1_Format) return extension.COMPRESSED_RGB_PVRTC_2BPPV1_IMG;
        if (p === RGBA_PVRTC_4BPPV1_Format) return extension.COMPRESSED_RGBA_PVRTC_4BPPV1_IMG;
        if (p === RGBA_PVRTC_2BPPV1_Format) return extension.COMPRESSED_RGBA_PVRTC_2BPPV1_IMG;
      } else {
        return null;
      }
    }
    if (p === RGB_ETC1_Format || p === RGB_ETC2_Format || p === RGBA_ETC2_EAC_Format) {
      extension = extensions.get("WEBGL_compressed_texture_etc");
      if (extension !== null) {
        if (p === RGB_ETC1_Format || p === RGB_ETC2_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ETC2 : extension.COMPRESSED_RGB8_ETC2;
        if (p === RGBA_ETC2_EAC_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ETC2_EAC : extension.COMPRESSED_RGBA8_ETC2_EAC;
      } else {
        return null;
      }
    }
    if (p === RGBA_ASTC_4x4_Format || p === RGBA_ASTC_5x4_Format || p === RGBA_ASTC_5x5_Format || p === RGBA_ASTC_6x5_Format || p === RGBA_ASTC_6x6_Format || p === RGBA_ASTC_8x5_Format || p === RGBA_ASTC_8x6_Format || p === RGBA_ASTC_8x8_Format || p === RGBA_ASTC_10x5_Format || p === RGBA_ASTC_10x6_Format || p === RGBA_ASTC_10x8_Format || p === RGBA_ASTC_10x10_Format || p === RGBA_ASTC_12x10_Format || p === RGBA_ASTC_12x12_Format) {
      extension = extensions.get("WEBGL_compressed_texture_astc");
      if (extension !== null) {
        if (p === RGBA_ASTC_4x4_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR : extension.COMPRESSED_RGBA_ASTC_4x4_KHR;
        if (p === RGBA_ASTC_5x4_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR : extension.COMPRESSED_RGBA_ASTC_5x4_KHR;
        if (p === RGBA_ASTC_5x5_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR : extension.COMPRESSED_RGBA_ASTC_5x5_KHR;
        if (p === RGBA_ASTC_6x5_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR : extension.COMPRESSED_RGBA_ASTC_6x5_KHR;
        if (p === RGBA_ASTC_6x6_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR : extension.COMPRESSED_RGBA_ASTC_6x6_KHR;
        if (p === RGBA_ASTC_8x5_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR : extension.COMPRESSED_RGBA_ASTC_8x5_KHR;
        if (p === RGBA_ASTC_8x6_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR : extension.COMPRESSED_RGBA_ASTC_8x6_KHR;
        if (p === RGBA_ASTC_8x8_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR : extension.COMPRESSED_RGBA_ASTC_8x8_KHR;
        if (p === RGBA_ASTC_10x5_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR : extension.COMPRESSED_RGBA_ASTC_10x5_KHR;
        if (p === RGBA_ASTC_10x6_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR : extension.COMPRESSED_RGBA_ASTC_10x6_KHR;
        if (p === RGBA_ASTC_10x8_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR : extension.COMPRESSED_RGBA_ASTC_10x8_KHR;
        if (p === RGBA_ASTC_10x10_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR : extension.COMPRESSED_RGBA_ASTC_10x10_KHR;
        if (p === RGBA_ASTC_12x10_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR : extension.COMPRESSED_RGBA_ASTC_12x10_KHR;
        if (p === RGBA_ASTC_12x12_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR : extension.COMPRESSED_RGBA_ASTC_12x12_KHR;
      } else {
        return null;
      }
    }
    if (p === RGBA_BPTC_Format || p === RGB_BPTC_SIGNED_Format || p === RGB_BPTC_UNSIGNED_Format) {
      extension = extensions.get("EXT_texture_compression_bptc");
      if (extension !== null) {
        if (p === RGBA_BPTC_Format) return transfer === SRGBTransfer ? extension.COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT : extension.COMPRESSED_RGBA_BPTC_UNORM_EXT;
        if (p === RGB_BPTC_SIGNED_Format) return extension.COMPRESSED_RGB_BPTC_SIGNED_FLOAT_EXT;
        if (p === RGB_BPTC_UNSIGNED_Format) return extension.COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_EXT;
      } else {
        return null;
      }
    }
    if (p === RED_RGTC1_Format || p === SIGNED_RED_RGTC1_Format || p === RED_GREEN_RGTC2_Format || p === SIGNED_RED_GREEN_RGTC2_Format) {
      extension = extensions.get("EXT_texture_compression_rgtc");
      if (extension !== null) {
        if (p === RGBA_BPTC_Format) return extension.COMPRESSED_RED_RGTC1_EXT;
        if (p === SIGNED_RED_RGTC1_Format) return extension.COMPRESSED_SIGNED_RED_RGTC1_EXT;
        if (p === RED_GREEN_RGTC2_Format) return extension.COMPRESSED_RED_GREEN_RGTC2_EXT;
        if (p === SIGNED_RED_GREEN_RGTC2_Format) return extension.COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT;
      } else {
        return null;
      }
    }
    if (p === UnsignedInt248Type) return gl.UNSIGNED_INT_24_8;
    return gl[p] !== void 0 ? gl[p] : null;
  }
  __name(convert, "convert");
  return { convert };
}
__name(WebGLUtils, "WebGLUtils");
class ArrayCamera extends PerspectiveCamera {
  static {
    __name(this, "ArrayCamera");
  }
  constructor(array = []) {
    super();
    this.isArrayCamera = true;
    this.cameras = array;
  }
}
class Group extends Object3D {
  static {
    __name(this, "Group");
  }
  constructor() {
    super();
    this.isGroup = true;
    this.type = "Group";
  }
}
const _moveEvent = { type: "move" };
class WebXRController {
  static {
    __name(this, "WebXRController");
  }
  constructor() {
    this._targetRay = null;
    this._grip = null;
    this._hand = null;
  }
  getHandSpace() {
    if (this._hand === null) {
      this._hand = new Group();
      this._hand.matrixAutoUpdate = false;
      this._hand.visible = false;
      this._hand.joints = {};
      this._hand.inputState = { pinching: false };
    }
    return this._hand;
  }
  getTargetRaySpace() {
    if (this._targetRay === null) {
      this._targetRay = new Group();
      this._targetRay.matrixAutoUpdate = false;
      this._targetRay.visible = false;
      this._targetRay.hasLinearVelocity = false;
      this._targetRay.linearVelocity = new Vector3();
      this._targetRay.hasAngularVelocity = false;
      this._targetRay.angularVelocity = new Vector3();
    }
    return this._targetRay;
  }
  getGripSpace() {
    if (this._grip === null) {
      this._grip = new Group();
      this._grip.matrixAutoUpdate = false;
      this._grip.visible = false;
      this._grip.hasLinearVelocity = false;
      this._grip.linearVelocity = new Vector3();
      this._grip.hasAngularVelocity = false;
      this._grip.angularVelocity = new Vector3();
    }
    return this._grip;
  }
  dispatchEvent(event) {
    if (this._targetRay !== null) {
      this._targetRay.dispatchEvent(event);
    }
    if (this._grip !== null) {
      this._grip.dispatchEvent(event);
    }
    if (this._hand !== null) {
      this._hand.dispatchEvent(event);
    }
    return this;
  }
  connect(inputSource) {
    if (inputSource && inputSource.hand) {
      const hand = this._hand;
      if (hand) {
        for (const inputjoint of inputSource.hand.values()) {
          this._getHandJoint(hand, inputjoint);
        }
      }
    }
    this.dispatchEvent({ type: "connected", data: inputSource });
    return this;
  }
  disconnect(inputSource) {
    this.dispatchEvent({ type: "disconnected", data: inputSource });
    if (this._targetRay !== null) {
      this._targetRay.visible = false;
    }
    if (this._grip !== null) {
      this._grip.visible = false;
    }
    if (this._hand !== null) {
      this._hand.visible = false;
    }
    return this;
  }
  update(inputSource, frame, referenceSpace) {
    let inputPose = null;
    let gripPose = null;
    let handPose = null;
    const targetRay = this._targetRay;
    const grip = this._grip;
    const hand = this._hand;
    if (inputSource && frame.session.visibilityState !== "visible-blurred") {
      if (hand && inputSource.hand) {
        handPose = true;
        for (const inputjoint of inputSource.hand.values()) {
          const jointPose = frame.getJointPose(inputjoint, referenceSpace);
          const joint = this._getHandJoint(hand, inputjoint);
          if (jointPose !== null) {
            joint.matrix.fromArray(jointPose.transform.matrix);
            joint.matrix.decompose(joint.position, joint.rotation, joint.scale);
            joint.matrixWorldNeedsUpdate = true;
            joint.jointRadius = jointPose.radius;
          }
          joint.visible = jointPose !== null;
        }
        const indexTip = hand.joints["index-finger-tip"];
        const thumbTip = hand.joints["thumb-tip"];
        const distance = indexTip.position.distanceTo(thumbTip.position);
        const distanceToPinch = 0.02;
        const threshold = 5e-3;
        if (hand.inputState.pinching && distance > distanceToPinch + threshold) {
          hand.inputState.pinching = false;
          this.dispatchEvent({
            type: "pinchend",
            handedness: inputSource.handedness,
            target: this
          });
        } else if (!hand.inputState.pinching && distance <= distanceToPinch - threshold) {
          hand.inputState.pinching = true;
          this.dispatchEvent({
            type: "pinchstart",
            handedness: inputSource.handedness,
            target: this
          });
        }
      } else {
        if (grip !== null && inputSource.gripSpace) {
          gripPose = frame.getPose(inputSource.gripSpace, referenceSpace);
          if (gripPose !== null) {
            grip.matrix.fromArray(gripPose.transform.matrix);
            grip.matrix.decompose(grip.position, grip.rotation, grip.scale);
            grip.matrixWorldNeedsUpdate = true;
            if (gripPose.linearVelocity) {
              grip.hasLinearVelocity = true;
              grip.linearVelocity.copy(gripPose.linearVelocity);
            } else {
              grip.hasLinearVelocity = false;
            }
            if (gripPose.angularVelocity) {
              grip.hasAngularVelocity = true;
              grip.angularVelocity.copy(gripPose.angularVelocity);
            } else {
              grip.hasAngularVelocity = false;
            }
          }
        }
      }
      if (targetRay !== null) {
        inputPose = frame.getPose(inputSource.targetRaySpace, referenceSpace);
        if (inputPose === null && gripPose !== null) {
          inputPose = gripPose;
        }
        if (inputPose !== null) {
          targetRay.matrix.fromArray(inputPose.transform.matrix);
          targetRay.matrix.decompose(targetRay.position, targetRay.rotation, targetRay.scale);
          targetRay.matrixWorldNeedsUpdate = true;
          if (inputPose.linearVelocity) {
            targetRay.hasLinearVelocity = true;
            targetRay.linearVelocity.copy(inputPose.linearVelocity);
          } else {
            targetRay.hasLinearVelocity = false;
          }
          if (inputPose.angularVelocity) {
            targetRay.hasAngularVelocity = true;
            targetRay.angularVelocity.copy(inputPose.angularVelocity);
          } else {
            targetRay.hasAngularVelocity = false;
          }
          this.dispatchEvent(_moveEvent);
        }
      }
    }
    if (targetRay !== null) {
      targetRay.visible = inputPose !== null;
    }
    if (grip !== null) {
      grip.visible = gripPose !== null;
    }
    if (hand !== null) {
      hand.visible = handPose !== null;
    }
    return this;
  }
  // private method
  _getHandJoint(hand, inputjoint) {
    if (hand.joints[inputjoint.jointName] === void 0) {
      const joint = new Group();
      joint.matrixAutoUpdate = false;
      joint.visible = false;
      hand.joints[inputjoint.jointName] = joint;
      hand.add(joint);
    }
    return hand.joints[inputjoint.jointName];
  }
}
const _occlusion_vertex = `
void main() {

	gl_Position = vec4( position, 1.0 );

}`;
const _occlusion_fragment = `
uniform sampler2DArray depthColor;
uniform float depthWidth;
uniform float depthHeight;

void main() {

	vec2 coord = vec2( gl_FragCoord.x / depthWidth, gl_FragCoord.y / depthHeight );

	if ( coord.x >= 1.0 ) {

		gl_FragDepth = texture( depthColor, vec3( coord.x - 1.0, coord.y, 1 ) ).r;

	} else {

		gl_FragDepth = texture( depthColor, vec3( coord.x, coord.y, 0 ) ).r;

	}

}`;
class WebXRDepthSensing {
  static {
    __name(this, "WebXRDepthSensing");
  }
  constructor() {
    this.texture = null;
    this.mesh = null;
    this.depthNear = 0;
    this.depthFar = 0;
  }
  init(renderer, depthData, renderState) {
    if (this.texture === null) {
      const texture = new Texture();
      const texProps = renderer.properties.get(texture);
      texProps.__webglTexture = depthData.texture;
      if (depthData.depthNear != renderState.depthNear || depthData.depthFar != renderState.depthFar) {
        this.depthNear = depthData.depthNear;
        this.depthFar = depthData.depthFar;
      }
      this.texture = texture;
    }
  }
  getMesh(cameraXR) {
    if (this.texture !== null) {
      if (this.mesh === null) {
        const viewport = cameraXR.cameras[0].viewport;
        const material = new ShaderMaterial({
          vertexShader: _occlusion_vertex,
          fragmentShader: _occlusion_fragment,
          uniforms: {
            depthColor: { value: this.texture },
            depthWidth: { value: viewport.z },
            depthHeight: { value: viewport.w }
          }
        });
        this.mesh = new Mesh(new PlaneGeometry(20, 20), material);
      }
    }
    return this.mesh;
  }
  reset() {
    this.texture = null;
    this.mesh = null;
  }
  getDepthTexture() {
    return this.texture;
  }
}
class WebXRManager extends EventDispatcher {
  static {
    __name(this, "WebXRManager");
  }
  constructor(renderer, gl) {
    super();
    const scope = this;
    let session = null;
    let framebufferScaleFactor = 1;
    let referenceSpace = null;
    let referenceSpaceType = "local-floor";
    let foveation = 1;
    let customReferenceSpace = null;
    let pose = null;
    let glBinding = null;
    let glProjLayer = null;
    let glBaseLayer = null;
    let xrFrame = null;
    const depthSensing = new WebXRDepthSensing();
    const attributes = gl.getContextAttributes();
    let initialRenderTarget = null;
    let newRenderTarget = null;
    const controllers = [];
    const controllerInputSources = [];
    const currentSize = new Vector2();
    let currentPixelRatio = null;
    const cameraL = new PerspectiveCamera();
    cameraL.viewport = new Vector4();
    const cameraR = new PerspectiveCamera();
    cameraR.viewport = new Vector4();
    const cameras = [cameraL, cameraR];
    const cameraXR = new ArrayCamera();
    let _currentDepthNear = null;
    let _currentDepthFar = null;
    this.cameraAutoUpdate = true;
    this.enabled = false;
    this.isPresenting = false;
    this.getController = function(index) {
      let controller = controllers[index];
      if (controller === void 0) {
        controller = new WebXRController();
        controllers[index] = controller;
      }
      return controller.getTargetRaySpace();
    };
    this.getControllerGrip = function(index) {
      let controller = controllers[index];
      if (controller === void 0) {
        controller = new WebXRController();
        controllers[index] = controller;
      }
      return controller.getGripSpace();
    };
    this.getHand = function(index) {
      let controller = controllers[index];
      if (controller === void 0) {
        controller = new WebXRController();
        controllers[index] = controller;
      }
      return controller.getHandSpace();
    };
    function onSessionEvent(event) {
      const controllerIndex = controllerInputSources.indexOf(event.inputSource);
      if (controllerIndex === -1) {
        return;
      }
      const controller = controllers[controllerIndex];
      if (controller !== void 0) {
        controller.update(event.inputSource, event.frame, customReferenceSpace || referenceSpace);
        controller.dispatchEvent({ type: event.type, data: event.inputSource });
      }
    }
    __name(onSessionEvent, "onSessionEvent");
    function onSessionEnd() {
      session.removeEventListener("select", onSessionEvent);
      session.removeEventListener("selectstart", onSessionEvent);
      session.removeEventListener("selectend", onSessionEvent);
      session.removeEventListener("squeeze", onSessionEvent);
      session.removeEventListener("squeezestart", onSessionEvent);
      session.removeEventListener("squeezeend", onSessionEvent);
      session.removeEventListener("end", onSessionEnd);
      session.removeEventListener("inputsourceschange", onInputSourcesChange);
      for (let i = 0; i < controllers.length; i++) {
        const inputSource = controllerInputSources[i];
        if (inputSource === null) continue;
        controllerInputSources[i] = null;
        controllers[i].disconnect(inputSource);
      }
      _currentDepthNear = null;
      _currentDepthFar = null;
      depthSensing.reset();
      renderer.setRenderTarget(initialRenderTarget);
      glBaseLayer = null;
      glProjLayer = null;
      glBinding = null;
      session = null;
      newRenderTarget = null;
      animation.stop();
      scope.isPresenting = false;
      renderer.setPixelRatio(currentPixelRatio);
      renderer.setSize(currentSize.width, currentSize.height, false);
      scope.dispatchEvent({ type: "sessionend" });
    }
    __name(onSessionEnd, "onSessionEnd");
    this.setFramebufferScaleFactor = function(value) {
      framebufferScaleFactor = value;
      if (scope.isPresenting === true) {
        console.warn("THREE.WebXRManager: Cannot change framebuffer scale while presenting.");
      }
    };
    this.setReferenceSpaceType = function(value) {
      referenceSpaceType = value;
      if (scope.isPresenting === true) {
        console.warn("THREE.WebXRManager: Cannot change reference space type while presenting.");
      }
    };
    this.getReferenceSpace = function() {
      return customReferenceSpace || referenceSpace;
    };
    this.setReferenceSpace = function(space) {
      customReferenceSpace = space;
    };
    this.getBaseLayer = function() {
      return glProjLayer !== null ? glProjLayer : glBaseLayer;
    };
    this.getBinding = function() {
      return glBinding;
    };
    this.getFrame = function() {
      return xrFrame;
    };
    this.getSession = function() {
      return session;
    };
    this.setSession = async function(value) {
      session = value;
      if (session !== null) {
        initialRenderTarget = renderer.getRenderTarget();
        session.addEventListener("select", onSessionEvent);
        session.addEventListener("selectstart", onSessionEvent);
        session.addEventListener("selectend", onSessionEvent);
        session.addEventListener("squeeze", onSessionEvent);
        session.addEventListener("squeezestart", onSessionEvent);
        session.addEventListener("squeezeend", onSessionEvent);
        session.addEventListener("end", onSessionEnd);
        session.addEventListener("inputsourceschange", onInputSourcesChange);
        if (attributes.xrCompatible !== true) {
          await gl.makeXRCompatible();
        }
        currentPixelRatio = renderer.getPixelRatio();
        renderer.getSize(currentSize);
        if (session.renderState.layers === void 0) {
          const layerInit = {
            antialias: attributes.antialias,
            alpha: true,
            depth: attributes.depth,
            stencil: attributes.stencil,
            framebufferScaleFactor
          };
          glBaseLayer = new XRWebGLLayer(session, gl, layerInit);
          session.updateRenderState({ baseLayer: glBaseLayer });
          renderer.setPixelRatio(1);
          renderer.setSize(glBaseLayer.framebufferWidth, glBaseLayer.framebufferHeight, false);
          newRenderTarget = new WebGLRenderTarget(
            glBaseLayer.framebufferWidth,
            glBaseLayer.framebufferHeight,
            {
              format: RGBAFormat,
              type: UnsignedByteType,
              colorSpace: renderer.outputColorSpace,
              stencilBuffer: attributes.stencil
            }
          );
        } else {
          let depthFormat = null;
          let depthType = null;
          let glDepthFormat = null;
          if (attributes.depth) {
            glDepthFormat = attributes.stencil ? gl.DEPTH24_STENCIL8 : gl.DEPTH_COMPONENT24;
            depthFormat = attributes.stencil ? DepthStencilFormat : DepthFormat;
            depthType = attributes.stencil ? UnsignedInt248Type : UnsignedIntType;
          }
          const projectionlayerInit = {
            colorFormat: gl.RGBA8,
            depthFormat: glDepthFormat,
            scaleFactor: framebufferScaleFactor
          };
          glBinding = new XRWebGLBinding(session, gl);
          glProjLayer = glBinding.createProjectionLayer(projectionlayerInit);
          session.updateRenderState({ layers: [glProjLayer] });
          renderer.setPixelRatio(1);
          renderer.setSize(glProjLayer.textureWidth, glProjLayer.textureHeight, false);
          newRenderTarget = new WebGLRenderTarget(
            glProjLayer.textureWidth,
            glProjLayer.textureHeight,
            {
              format: RGBAFormat,
              type: UnsignedByteType,
              depthTexture: new DepthTexture(glProjLayer.textureWidth, glProjLayer.textureHeight, depthType, void 0, void 0, void 0, void 0, void 0, void 0, depthFormat),
              stencilBuffer: attributes.stencil,
              colorSpace: renderer.outputColorSpace,
              samples: attributes.antialias ? 4 : 0,
              resolveDepthBuffer: glProjLayer.ignoreDepthValues === false
            }
          );
        }
        newRenderTarget.isXRRenderTarget = true;
        this.setFoveation(foveation);
        customReferenceSpace = null;
        referenceSpace = await session.requestReferenceSpace(referenceSpaceType);
        animation.setContext(session);
        animation.start();
        scope.isPresenting = true;
        scope.dispatchEvent({ type: "sessionstart" });
      }
    };
    this.getEnvironmentBlendMode = function() {
      if (session !== null) {
        return session.environmentBlendMode;
      }
    };
    this.getDepthTexture = function() {
      return depthSensing.getDepthTexture();
    };
    function onInputSourcesChange(event) {
      for (let i = 0; i < event.removed.length; i++) {
        const inputSource = event.removed[i];
        const index = controllerInputSources.indexOf(inputSource);
        if (index >= 0) {
          controllerInputSources[index] = null;
          controllers[index].disconnect(inputSource);
        }
      }
      for (let i = 0; i < event.added.length; i++) {
        const inputSource = event.added[i];
        let controllerIndex = controllerInputSources.indexOf(inputSource);
        if (controllerIndex === -1) {
          for (let i2 = 0; i2 < controllers.length; i2++) {
            if (i2 >= controllerInputSources.length) {
              controllerInputSources.push(inputSource);
              controllerIndex = i2;
              break;
            } else if (controllerInputSources[i2] === null) {
              controllerInputSources[i2] = inputSource;
              controllerIndex = i2;
              break;
            }
          }
          if (controllerIndex === -1) break;
        }
        const controller = controllers[controllerIndex];
        if (controller) {
          controller.connect(inputSource);
        }
      }
    }
    __name(onInputSourcesChange, "onInputSourcesChange");
    const cameraLPos = new Vector3();
    const cameraRPos = new Vector3();
    function setProjectionFromUnion(camera, cameraL2, cameraR2) {
      cameraLPos.setFromMatrixPosition(cameraL2.matrixWorld);
      cameraRPos.setFromMatrixPosition(cameraR2.matrixWorld);
      const ipd = cameraLPos.distanceTo(cameraRPos);
      const projL = cameraL2.projectionMatrix.elements;
      const projR = cameraR2.projectionMatrix.elements;
      const near = projL[14] / (projL[10] - 1);
      const far = projL[14] / (projL[10] + 1);
      const topFov = (projL[9] + 1) / projL[5];
      const bottomFov = (projL[9] - 1) / projL[5];
      const leftFov = (projL[8] - 1) / projL[0];
      const rightFov = (projR[8] + 1) / projR[0];
      const left = near * leftFov;
      const right = near * rightFov;
      const zOffset = ipd / (-leftFov + rightFov);
      const xOffset = zOffset * -leftFov;
      cameraL2.matrixWorld.decompose(camera.position, camera.quaternion, camera.scale);
      camera.translateX(xOffset);
      camera.translateZ(zOffset);
      camera.matrixWorld.compose(camera.position, camera.quaternion, camera.scale);
      camera.matrixWorldInverse.copy(camera.matrixWorld).invert();
      if (projL[10] === -1) {
        camera.projectionMatrix.copy(cameraL2.projectionMatrix);
        camera.projectionMatrixInverse.copy(cameraL2.projectionMatrixInverse);
      } else {
        const near2 = near + zOffset;
        const far2 = far + zOffset;
        const left2 = left - xOffset;
        const right2 = right + (ipd - xOffset);
        const top2 = topFov * far / far2 * near2;
        const bottom2 = bottomFov * far / far2 * near2;
        camera.projectionMatrix.makePerspective(left2, right2, top2, bottom2, near2, far2);
        camera.projectionMatrixInverse.copy(camera.projectionMatrix).invert();
      }
    }
    __name(setProjectionFromUnion, "setProjectionFromUnion");
    function updateCamera(camera, parent) {
      if (parent === null) {
        camera.matrixWorld.copy(camera.matrix);
      } else {
        camera.matrixWorld.multiplyMatrices(parent.matrixWorld, camera.matrix);
      }
      camera.matrixWorldInverse.copy(camera.matrixWorld).invert();
    }
    __name(updateCamera, "updateCamera");
    this.updateCamera = function(camera) {
      if (session === null) return;
      let depthNear = camera.near;
      let depthFar = camera.far;
      if (depthSensing.texture !== null) {
        if (depthSensing.depthNear > 0) depthNear = depthSensing.depthNear;
        if (depthSensing.depthFar > 0) depthFar = depthSensing.depthFar;
      }
      cameraXR.near = cameraR.near = cameraL.near = depthNear;
      cameraXR.far = cameraR.far = cameraL.far = depthFar;
      if (_currentDepthNear !== cameraXR.near || _currentDepthFar !== cameraXR.far) {
        session.updateRenderState({
          depthNear: cameraXR.near,
          depthFar: cameraXR.far
        });
        _currentDepthNear = cameraXR.near;
        _currentDepthFar = cameraXR.far;
      }
      cameraL.layers.mask = camera.layers.mask | 2;
      cameraR.layers.mask = camera.layers.mask | 4;
      cameraXR.layers.mask = cameraL.layers.mask | cameraR.layers.mask;
      const parent = camera.parent;
      const cameras2 = cameraXR.cameras;
      updateCamera(cameraXR, parent);
      for (let i = 0; i < cameras2.length; i++) {
        updateCamera(cameras2[i], parent);
      }
      if (cameras2.length === 2) {
        setProjectionFromUnion(cameraXR, cameraL, cameraR);
      } else {
        cameraXR.projectionMatrix.copy(cameraL.projectionMatrix);
      }
      updateUserCamera(camera, cameraXR, parent);
    };
    function updateUserCamera(camera, cameraXR2, parent) {
      if (parent === null) {
        camera.matrix.copy(cameraXR2.matrixWorld);
      } else {
        camera.matrix.copy(parent.matrixWorld);
        camera.matrix.invert();
        camera.matrix.multiply(cameraXR2.matrixWorld);
      }
      camera.matrix.decompose(camera.position, camera.quaternion, camera.scale);
      camera.updateMatrixWorld(true);
      camera.projectionMatrix.copy(cameraXR2.projectionMatrix);
      camera.projectionMatrixInverse.copy(cameraXR2.projectionMatrixInverse);
      if (camera.isPerspectiveCamera) {
        camera.fov = RAD2DEG * 2 * Math.atan(1 / camera.projectionMatrix.elements[5]);
        camera.zoom = 1;
      }
    }
    __name(updateUserCamera, "updateUserCamera");
    this.getCamera = function() {
      return cameraXR;
    };
    this.getFoveation = function() {
      if (glProjLayer === null && glBaseLayer === null) {
        return void 0;
      }
      return foveation;
    };
    this.setFoveation = function(value) {
      foveation = value;
      if (glProjLayer !== null) {
        glProjLayer.fixedFoveation = value;
      }
      if (glBaseLayer !== null && glBaseLayer.fixedFoveation !== void 0) {
        glBaseLayer.fixedFoveation = value;
      }
    };
    this.hasDepthSensing = function() {
      return depthSensing.texture !== null;
    };
    this.getDepthSensingMesh = function() {
      return depthSensing.getMesh(cameraXR);
    };
    let onAnimationFrameCallback = null;
    function onAnimationFrame(time, frame) {
      pose = frame.getViewerPose(customReferenceSpace || referenceSpace);
      xrFrame = frame;
      if (pose !== null) {
        const views = pose.views;
        if (glBaseLayer !== null) {
          renderer.setRenderTargetFramebuffer(newRenderTarget, glBaseLayer.framebuffer);
          renderer.setRenderTarget(newRenderTarget);
        }
        let cameraXRNeedsUpdate = false;
        if (views.length !== cameraXR.cameras.length) {
          cameraXR.cameras.length = 0;
          cameraXRNeedsUpdate = true;
        }
        for (let i = 0; i < views.length; i++) {
          const view = views[i];
          let viewport = null;
          if (glBaseLayer !== null) {
            viewport = glBaseLayer.getViewport(view);
          } else {
            const glSubImage = glBinding.getViewSubImage(glProjLayer, view);
            viewport = glSubImage.viewport;
            if (i === 0) {
              renderer.setRenderTargetTextures(
                newRenderTarget,
                glSubImage.colorTexture,
                glProjLayer.ignoreDepthValues ? void 0 : glSubImage.depthStencilTexture
              );
              renderer.setRenderTarget(newRenderTarget);
            }
          }
          let camera = cameras[i];
          if (camera === void 0) {
            camera = new PerspectiveCamera();
            camera.layers.enable(i);
            camera.viewport = new Vector4();
            cameras[i] = camera;
          }
          camera.matrix.fromArray(view.transform.matrix);
          camera.matrix.decompose(camera.position, camera.quaternion, camera.scale);
          camera.projectionMatrix.fromArray(view.projectionMatrix);
          camera.projectionMatrixInverse.copy(camera.projectionMatrix).invert();
          camera.viewport.set(viewport.x, viewport.y, viewport.width, viewport.height);
          if (i === 0) {
            cameraXR.matrix.copy(camera.matrix);
            cameraXR.matrix.decompose(cameraXR.position, cameraXR.quaternion, cameraXR.scale);
          }
          if (cameraXRNeedsUpdate === true) {
            cameraXR.cameras.push(camera);
          }
        }
        const enabledFeatures = session.enabledFeatures;
        if (enabledFeatures && enabledFeatures.includes("depth-sensing")) {
          const depthData = glBinding.getDepthInformation(views[0]);
          if (depthData && depthData.isValid && depthData.texture) {
            depthSensing.init(renderer, depthData, session.renderState);
          }
        }
      }
      for (let i = 0; i < controllers.length; i++) {
        const inputSource = controllerInputSources[i];
        const controller = controllers[i];
        if (inputSource !== null && controller !== void 0) {
          controller.update(inputSource, frame, customReferenceSpace || referenceSpace);
        }
      }
      if (onAnimationFrameCallback) onAnimationFrameCallback(time, frame);
      if (frame.detectedPlanes) {
        scope.dispatchEvent({ type: "planesdetected", data: frame });
      }
      xrFrame = null;
    }
    __name(onAnimationFrame, "onAnimationFrame");
    const animation = new WebGLAnimation();
    animation.setAnimationLoop(onAnimationFrame);
    this.setAnimationLoop = function(callback) {
      onAnimationFrameCallback = callback;
    };
    this.dispose = function() {
    };
  }
}
const _e1 = /* @__PURE__ */ new Euler();
const _m1 = /* @__PURE__ */ new Matrix4();
function WebGLMaterials(renderer, properties) {
  function refreshTransformUniform(map, uniform) {
    if (map.matrixAutoUpdate === true) {
      map.updateMatrix();
    }
    uniform.value.copy(map.matrix);
  }
  __name(refreshTransformUniform, "refreshTransformUniform");
  function refreshFogUniforms(uniforms, fog) {
    fog.color.getRGB(uniforms.fogColor.value, getUnlitUniformColorSpace(renderer));
    if (fog.isFog) {
      uniforms.fogNear.value = fog.near;
      uniforms.fogFar.value = fog.far;
    } else if (fog.isFogExp2) {
      uniforms.fogDensity.value = fog.density;
    }
  }
  __name(refreshFogUniforms, "refreshFogUniforms");
  function refreshMaterialUniforms(uniforms, material, pixelRatio, height, transmissionRenderTarget) {
    if (material.isMeshBasicMaterial) {
      refreshUniformsCommon(uniforms, material);
    } else if (material.isMeshLambertMaterial) {
      refreshUniformsCommon(uniforms, material);
    } else if (material.isMeshToonMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsToon(uniforms, material);
    } else if (material.isMeshPhongMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsPhong(uniforms, material);
    } else if (material.isMeshStandardMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsStandard(uniforms, material);
      if (material.isMeshPhysicalMaterial) {
        refreshUniformsPhysical(uniforms, material, transmissionRenderTarget);
      }
    } else if (material.isMeshMatcapMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsMatcap(uniforms, material);
    } else if (material.isMeshDepthMaterial) {
      refreshUniformsCommon(uniforms, material);
    } else if (material.isMeshDistanceMaterial) {
      refreshUniformsCommon(uniforms, material);
      refreshUniformsDistance(uniforms, material);
    } else if (material.isMeshNormalMaterial) {
      refreshUniformsCommon(uniforms, material);
    } else if (material.isLineBasicMaterial) {
      refreshUniformsLine(uniforms, material);
      if (material.isLineDashedMaterial) {
        refreshUniformsDash(uniforms, material);
      }
    } else if (material.isPointsMaterial) {
      refreshUniformsPoints(uniforms, material, pixelRatio, height);
    } else if (material.isSpriteMaterial) {
      refreshUniformsSprites(uniforms, material);
    } else if (material.isShadowMaterial) {
      uniforms.color.value.copy(material.color);
      uniforms.opacity.value = material.opacity;
    } else if (material.isShaderMaterial) {
      material.uniformsNeedUpdate = false;
    }
  }
  __name(refreshMaterialUniforms, "refreshMaterialUniforms");
  function refreshUniformsCommon(uniforms, material) {
    uniforms.opacity.value = material.opacity;
    if (material.color) {
      uniforms.diffuse.value.copy(material.color);
    }
    if (material.emissive) {
      uniforms.emissive.value.copy(material.emissive).multiplyScalar(material.emissiveIntensity);
    }
    if (material.map) {
      uniforms.map.value = material.map;
      refreshTransformUniform(material.map, uniforms.mapTransform);
    }
    if (material.alphaMap) {
      uniforms.alphaMap.value = material.alphaMap;
      refreshTransformUniform(material.alphaMap, uniforms.alphaMapTransform);
    }
    if (material.bumpMap) {
      uniforms.bumpMap.value = material.bumpMap;
      refreshTransformUniform(material.bumpMap, uniforms.bumpMapTransform);
      uniforms.bumpScale.value = material.bumpScale;
      if (material.side === BackSide) {
        uniforms.bumpScale.value *= -1;
      }
    }
    if (material.normalMap) {
      uniforms.normalMap.value = material.normalMap;
      refreshTransformUniform(material.normalMap, uniforms.normalMapTransform);
      uniforms.normalScale.value.copy(material.normalScale);
      if (material.side === BackSide) {
        uniforms.normalScale.value.negate();
      }
    }
    if (material.displacementMap) {
      uniforms.displacementMap.value = material.displacementMap;
      refreshTransformUniform(material.displacementMap, uniforms.displacementMapTransform);
      uniforms.displacementScale.value = material.displacementScale;
      uniforms.displacementBias.value = material.displacementBias;
    }
    if (material.emissiveMap) {
      uniforms.emissiveMap.value = material.emissiveMap;
      refreshTransformUniform(material.emissiveMap, uniforms.emissiveMapTransform);
    }
    if (material.specularMap) {
      uniforms.specularMap.value = material.specularMap;
      refreshTransformUniform(material.specularMap, uniforms.specularMapTransform);
    }
    if (material.alphaTest > 0) {
      uniforms.alphaTest.value = material.alphaTest;
    }
    const materialProperties = properties.get(material);
    const envMap = materialProperties.envMap;
    const envMapRotation = materialProperties.envMapRotation;
    if (envMap) {
      uniforms.envMap.value = envMap;
      _e1.copy(envMapRotation);
      _e1.x *= -1;
      _e1.y *= -1;
      _e1.z *= -1;
      if (envMap.isCubeTexture && envMap.isRenderTargetTexture === false) {
        _e1.y *= -1;
        _e1.z *= -1;
      }
      uniforms.envMapRotation.value.setFromMatrix4(_m1.makeRotationFromEuler(_e1));
      uniforms.flipEnvMap.value = envMap.isCubeTexture && envMap.isRenderTargetTexture === false ? -1 : 1;
      uniforms.reflectivity.value = material.reflectivity;
      uniforms.ior.value = material.ior;
      uniforms.refractionRatio.value = material.refractionRatio;
    }
    if (material.lightMap) {
      uniforms.lightMap.value = material.lightMap;
      uniforms.lightMapIntensity.value = material.lightMapIntensity;
      refreshTransformUniform(material.lightMap, uniforms.lightMapTransform);
    }
    if (material.aoMap) {
      uniforms.aoMap.value = material.aoMap;
      uniforms.aoMapIntensity.value = material.aoMapIntensity;
      refreshTransformUniform(material.aoMap, uniforms.aoMapTransform);
    }
  }
  __name(refreshUniformsCommon, "refreshUniformsCommon");
  function refreshUniformsLine(uniforms, material) {
    uniforms.diffuse.value.copy(material.color);
    uniforms.opacity.value = material.opacity;
    if (material.map) {
      uniforms.map.value = material.map;
      refreshTransformUniform(material.map, uniforms.mapTransform);
    }
  }
  __name(refreshUniformsLine, "refreshUniformsLine");
  function refreshUniformsDash(uniforms, material) {
    uniforms.dashSize.value = material.dashSize;
    uniforms.totalSize.value = material.dashSize + material.gapSize;
    uniforms.scale.value = material.scale;
  }
  __name(refreshUniformsDash, "refreshUniformsDash");
  function refreshUniformsPoints(uniforms, material, pixelRatio, height) {
    uniforms.diffuse.value.copy(material.color);
    uniforms.opacity.value = material.opacity;
    uniforms.size.value = material.size * pixelRatio;
    uniforms.scale.value = height * 0.5;
    if (material.map) {
      uniforms.map.value = material.map;
      refreshTransformUniform(material.map, uniforms.uvTransform);
    }
    if (material.alphaMap) {
      uniforms.alphaMap.value = material.alphaMap;
      refreshTransformUniform(material.alphaMap, uniforms.alphaMapTransform);
    }
    if (material.alphaTest > 0) {
      uniforms.alphaTest.value = material.alphaTest;
    }
  }
  __name(refreshUniformsPoints, "refreshUniformsPoints");
  function refreshUniformsSprites(uniforms, material) {
    uniforms.diffuse.value.copy(material.color);
    uniforms.opacity.value = material.opacity;
    uniforms.rotation.value = material.rotation;
    if (material.map) {
      uniforms.map.value = material.map;
      refreshTransformUniform(material.map, uniforms.mapTransform);
    }
    if (material.alphaMap) {
      uniforms.alphaMap.value = material.alphaMap;
      refreshTransformUniform(material.alphaMap, uniforms.alphaMapTransform);
    }
    if (material.alphaTest > 0) {
      uniforms.alphaTest.value = material.alphaTest;
    }
  }
  __name(refreshUniformsSprites, "refreshUniformsSprites");
  function refreshUniformsPhong(uniforms, material) {
    uniforms.specular.value.copy(material.specular);
    uniforms.shininess.value = Math.max(material.shininess, 1e-4);
  }
  __name(refreshUniformsPhong, "refreshUniformsPhong");
  function refreshUniformsToon(uniforms, material) {
    if (material.gradientMap) {
      uniforms.gradientMap.value = material.gradientMap;
    }
  }
  __name(refreshUniformsToon, "refreshUniformsToon");
  function refreshUniformsStandard(uniforms, material) {
    uniforms.metalness.value = material.metalness;
    if (material.metalnessMap) {
      uniforms.metalnessMap.value = material.metalnessMap;
      refreshTransformUniform(material.metalnessMap, uniforms.metalnessMapTransform);
    }
    uniforms.roughness.value = material.roughness;
    if (material.roughnessMap) {
      uniforms.roughnessMap.value = material.roughnessMap;
      refreshTransformUniform(material.roughnessMap, uniforms.roughnessMapTransform);
    }
    if (material.envMap) {
      uniforms.envMapIntensity.value = material.envMapIntensity;
    }
  }
  __name(refreshUniformsStandard, "refreshUniformsStandard");
  function refreshUniformsPhysical(uniforms, material, transmissionRenderTarget) {
    uniforms.ior.value = material.ior;
    if (material.sheen > 0) {
      uniforms.sheenColor.value.copy(material.sheenColor).multiplyScalar(material.sheen);
      uniforms.sheenRoughness.value = material.sheenRoughness;
      if (material.sheenColorMap) {
        uniforms.sheenColorMap.value = material.sheenColorMap;
        refreshTransformUniform(material.sheenColorMap, uniforms.sheenColorMapTransform);
      }
      if (material.sheenRoughnessMap) {
        uniforms.sheenRoughnessMap.value = material.sheenRoughnessMap;
        refreshTransformUniform(material.sheenRoughnessMap, uniforms.sheenRoughnessMapTransform);
      }
    }
    if (material.clearcoat > 0) {
      uniforms.clearcoat.value = material.clearcoat;
      uniforms.clearcoatRoughness.value = material.clearcoatRoughness;
      if (material.clearcoatMap) {
        uniforms.clearcoatMap.value = material.clearcoatMap;
        refreshTransformUniform(material.clearcoatMap, uniforms.clearcoatMapTransform);
      }
      if (material.clearcoatRoughnessMap) {
        uniforms.clearcoatRoughnessMap.value = material.clearcoatRoughnessMap;
        refreshTransformUniform(material.clearcoatRoughnessMap, uniforms.clearcoatRoughnessMapTransform);
      }
      if (material.clearcoatNormalMap) {
        uniforms.clearcoatNormalMap.value = material.clearcoatNormalMap;
        refreshTransformUniform(material.clearcoatNormalMap, uniforms.clearcoatNormalMapTransform);
        uniforms.clearcoatNormalScale.value.copy(material.clearcoatNormalScale);
        if (material.side === BackSide) {
          uniforms.clearcoatNormalScale.value.negate();
        }
      }
    }
    if (material.dispersion > 0) {
      uniforms.dispersion.value = material.dispersion;
    }
    if (material.iridescence > 0) {
      uniforms.iridescence.value = material.iridescence;
      uniforms.iridescenceIOR.value = material.iridescenceIOR;
      uniforms.iridescenceThicknessMinimum.value = material.iridescenceThicknessRange[0];
      uniforms.iridescenceThicknessMaximum.value = material.iridescenceThicknessRange[1];
      if (material.iridescenceMap) {
        uniforms.iridescenceMap.value = material.iridescenceMap;
        refreshTransformUniform(material.iridescenceMap, uniforms.iridescenceMapTransform);
      }
      if (material.iridescenceThicknessMap) {
        uniforms.iridescenceThicknessMap.value = material.iridescenceThicknessMap;
        refreshTransformUniform(material.iridescenceThicknessMap, uniforms.iridescenceThicknessMapTransform);
      }
    }
    if (material.transmission > 0) {
      uniforms.transmission.value = material.transmission;
      uniforms.transmissionSamplerMap.value = transmissionRenderTarget.texture;
      uniforms.transmissionSamplerSize.value.set(transmissionRenderTarget.width, transmissionRenderTarget.height);
      if (material.transmissionMap) {
        uniforms.transmissionMap.value = material.transmissionMap;
        refreshTransformUniform(material.transmissionMap, uniforms.transmissionMapTransform);
      }
      uniforms.thickness.value = material.thickness;
      if (material.thicknessMap) {
        uniforms.thicknessMap.value = material.thicknessMap;
        refreshTransformUniform(material.thicknessMap, uniforms.thicknessMapTransform);
      }
      uniforms.attenuationDistance.value = material.attenuationDistance;
      uniforms.attenuationColor.value.copy(material.attenuationColor);
    }
    if (material.anisotropy > 0) {
      uniforms.anisotropyVector.value.set(material.anisotropy * Math.cos(material.anisotropyRotation), material.anisotropy * Math.sin(material.anisotropyRotation));
      if (material.anisotropyMap) {
        uniforms.anisotropyMap.value = material.anisotropyMap;
        refreshTransformUniform(material.anisotropyMap, uniforms.anisotropyMapTransform);
      }
    }
    uniforms.specularIntensity.value = material.specularIntensity;
    uniforms.specularColor.value.copy(material.specularColor);
    if (material.specularColorMap) {
      uniforms.specularColorMap.value = material.specularColorMap;
      refreshTransformUniform(material.specularColorMap, uniforms.specularColorMapTransform);
    }
    if (material.specularIntensityMap) {
      uniforms.specularIntensityMap.value = material.specularIntensityMap;
      refreshTransformUniform(material.specularIntensityMap, uniforms.specularIntensityMapTransform);
    }
  }
  __name(refreshUniformsPhysical, "refreshUniformsPhysical");
  function refreshUniformsMatcap(uniforms, material) {
    if (material.matcap) {
      uniforms.matcap.value = material.matcap;
    }
  }
  __name(refreshUniformsMatcap, "refreshUniformsMatcap");
  function refreshUniformsDistance(uniforms, material) {
    const light = properties.get(material).light;
    uniforms.referencePosition.value.setFromMatrixPosition(light.matrixWorld);
    uniforms.nearDistance.value = light.shadow.camera.near;
    uniforms.farDistance.value = light.shadow.camera.far;
  }
  __name(refreshUniformsDistance, "refreshUniformsDistance");
  return {
    refreshFogUniforms,
    refreshMaterialUniforms
  };
}
__name(WebGLMaterials, "WebGLMaterials");
function WebGLUniformsGroups(gl, info, capabilities, state) {
  let buffers = {};
  let updateList = {};
  let allocatedBindingPoints = [];
  const maxBindingPoints = gl.getParameter(gl.MAX_UNIFORM_BUFFER_BINDINGS);
  function bind(uniformsGroup, program) {
    const webglProgram = program.program;
    state.uniformBlockBinding(uniformsGroup, webglProgram);
  }
  __name(bind, "bind");
  function update(uniformsGroup, program) {
    let buffer = buffers[uniformsGroup.id];
    if (buffer === void 0) {
      prepareUniformsGroup(uniformsGroup);
      buffer = createBuffer(uniformsGroup);
      buffers[uniformsGroup.id] = buffer;
      uniformsGroup.addEventListener("dispose", onUniformsGroupsDispose);
    }
    const webglProgram = program.program;
    state.updateUBOMapping(uniformsGroup, webglProgram);
    const frame = info.render.frame;
    if (updateList[uniformsGroup.id] !== frame) {
      updateBufferData(uniformsGroup);
      updateList[uniformsGroup.id] = frame;
    }
  }
  __name(update, "update");
  function createBuffer(uniformsGroup) {
    const bindingPointIndex = allocateBindingPointIndex();
    uniformsGroup.__bindingPointIndex = bindingPointIndex;
    const buffer = gl.createBuffer();
    const size = uniformsGroup.__size;
    const usage = uniformsGroup.usage;
    gl.bindBuffer(gl.UNIFORM_BUFFER, buffer);
    gl.bufferData(gl.UNIFORM_BUFFER, size, usage);
    gl.bindBuffer(gl.UNIFORM_BUFFER, null);
    gl.bindBufferBase(gl.UNIFORM_BUFFER, bindingPointIndex, buffer);
    return buffer;
  }
  __name(createBuffer, "createBuffer");
  function allocateBindingPointIndex() {
    for (let i = 0; i < maxBindingPoints; i++) {
      if (allocatedBindingPoints.indexOf(i) === -1) {
        allocatedBindingPoints.push(i);
        return i;
      }
    }
    console.error("THREE.WebGLRenderer: Maximum number of simultaneously usable uniforms groups reached.");
    return 0;
  }
  __name(allocateBindingPointIndex, "allocateBindingPointIndex");
  function updateBufferData(uniformsGroup) {
    const buffer = buffers[uniformsGroup.id];
    const uniforms = uniformsGroup.uniforms;
    const cache = uniformsGroup.__cache;
    gl.bindBuffer(gl.UNIFORM_BUFFER, buffer);
    for (let i = 0, il = uniforms.length; i < il; i++) {
      const uniformArray = Array.isArray(uniforms[i]) ? uniforms[i] : [uniforms[i]];
      for (let j = 0, jl = uniformArray.length; j < jl; j++) {
        const uniform = uniformArray[j];
        if (hasUniformChanged(uniform, i, j, cache) === true) {
          const offset = uniform.__offset;
          const values = Array.isArray(uniform.value) ? uniform.value : [uniform.value];
          let arrayOffset = 0;
          for (let k = 0; k < values.length; k++) {
            const value = values[k];
            const info2 = getUniformSize(value);
            if (typeof value === "number" || typeof value === "boolean") {
              uniform.__data[0] = value;
              gl.bufferSubData(gl.UNIFORM_BUFFER, offset + arrayOffset, uniform.__data);
            } else if (value.isMatrix3) {
              uniform.__data[0] = value.elements[0];
              uniform.__data[1] = value.elements[1];
              uniform.__data[2] = value.elements[2];
              uniform.__data[3] = 0;
              uniform.__data[4] = value.elements[3];
              uniform.__data[5] = value.elements[4];
              uniform.__data[6] = value.elements[5];
              uniform.__data[7] = 0;
              uniform.__data[8] = value.elements[6];
              uniform.__data[9] = value.elements[7];
              uniform.__data[10] = value.elements[8];
              uniform.__data[11] = 0;
            } else {
              value.toArray(uniform.__data, arrayOffset);
              arrayOffset += info2.storage / Float32Array.BYTES_PER_ELEMENT;
            }
          }
          gl.bufferSubData(gl.UNIFORM_BUFFER, offset, uniform.__data);
        }
      }
    }
    gl.bindBuffer(gl.UNIFORM_BUFFER, null);
  }
  __name(updateBufferData, "updateBufferData");
  function hasUniformChanged(uniform, index, indexArray, cache) {
    const value = uniform.value;
    const indexString = index + "_" + indexArray;
    if (cache[indexString] === void 0) {
      if (typeof value === "number" || typeof value === "boolean") {
        cache[indexString] = value;
      } else {
        cache[indexString] = value.clone();
      }
      return true;
    } else {
      const cachedObject = cache[indexString];
      if (typeof value === "number" || typeof value === "boolean") {
        if (cachedObject !== value) {
          cache[indexString] = value;
          return true;
        }
      } else {
        if (cachedObject.equals(value) === false) {
          cachedObject.copy(value);
          return true;
        }
      }
    }
    return false;
  }
  __name(hasUniformChanged, "hasUniformChanged");
  function prepareUniformsGroup(uniformsGroup) {
    const uniforms = uniformsGroup.uniforms;
    let offset = 0;
    const chunkSize = 16;
    for (let i = 0, l = uniforms.length; i < l; i++) {
      const uniformArray = Array.isArray(uniforms[i]) ? uniforms[i] : [uniforms[i]];
      for (let j = 0, jl = uniformArray.length; j < jl; j++) {
        const uniform = uniformArray[j];
        const values = Array.isArray(uniform.value) ? uniform.value : [uniform.value];
        for (let k = 0, kl = values.length; k < kl; k++) {
          const value = values[k];
          const info2 = getUniformSize(value);
          const chunkOffset2 = offset % chunkSize;
          const chunkPadding = chunkOffset2 % info2.boundary;
          const chunkStart = chunkOffset2 + chunkPadding;
          offset += chunkPadding;
          if (chunkStart !== 0 && chunkSize - chunkStart < info2.storage) {
            offset += chunkSize - chunkStart;
          }
          uniform.__data = new Float32Array(info2.storage / Float32Array.BYTES_PER_ELEMENT);
          uniform.__offset = offset;
          offset += info2.storage;
        }
      }
    }
    const chunkOffset = offset % chunkSize;
    if (chunkOffset > 0) offset += chunkSize - chunkOffset;
    uniformsGroup.__size = offset;
    uniformsGroup.__cache = {};
    return this;
  }
  __name(prepareUniformsGroup, "prepareUniformsGroup");
  function getUniformSize(value) {
    const info2 = {
      boundary: 0,
      // bytes
      storage: 0
      // bytes
    };
    if (typeof value === "number" || typeof value === "boolean") {
      info2.boundary = 4;
      info2.storage = 4;
    } else if (value.isVector2) {
      info2.boundary = 8;
      info2.storage = 8;
    } else if (value.isVector3 || value.isColor) {
      info2.boundary = 16;
      info2.storage = 12;
    } else if (value.isVector4) {
      info2.boundary = 16;
      info2.storage = 16;
    } else if (value.isMatrix3) {
      info2.boundary = 48;
      info2.storage = 48;
    } else if (value.isMatrix4) {
      info2.boundary = 64;
      info2.storage = 64;
    } else if (value.isTexture) {
      console.warn("THREE.WebGLRenderer: Texture samplers can not be part of an uniforms group.");
    } else {
      console.warn("THREE.WebGLRenderer: Unsupported uniform value type.", value);
    }
    return info2;
  }
  __name(getUniformSize, "getUniformSize");
  function onUniformsGroupsDispose(event) {
    const uniformsGroup = event.target;
    uniformsGroup.removeEventListener("dispose", onUniformsGroupsDispose);
    const index = allocatedBindingPoints.indexOf(uniformsGroup.__bindingPointIndex);
    allocatedBindingPoints.splice(index, 1);
    gl.deleteBuffer(buffers[uniformsGroup.id]);
    delete buffers[uniformsGroup.id];
    delete updateList[uniformsGroup.id];
  }
  __name(onUniformsGroupsDispose, "onUniformsGroupsDispose");
  function dispose() {
    for (const id in buffers) {
      gl.deleteBuffer(buffers[id]);
    }
    allocatedBindingPoints = [];
    buffers = {};
    updateList = {};
  }
  __name(dispose, "dispose");
  return {
    bind,
    update,
    dispose
  };
}
__name(WebGLUniformsGroups, "WebGLUniformsGroups");
class WebGLRenderer {
  static {
    __name(this, "WebGLRenderer");
  }
  constructor(parameters = {}) {
    const {
      canvas = createCanvasElement(),
      context = null,
      depth = true,
      stencil = false,
      alpha = false,
      antialias = false,
      premultipliedAlpha = true,
      preserveDrawingBuffer = false,
      powerPreference = "default",
      failIfMajorPerformanceCaveat = false,
      reverseDepthBuffer = false
    } = parameters;
    this.isWebGLRenderer = true;
    let _alpha;
    if (context !== null) {
      if (typeof WebGLRenderingContext !== "undefined" && context instanceof WebGLRenderingContext) {
        throw new Error("THREE.WebGLRenderer: WebGL 1 is not supported since r163.");
      }
      _alpha = context.getContextAttributes().alpha;
    } else {
      _alpha = alpha;
    }
    const uintClearColor = new Uint32Array(4);
    const intClearColor = new Int32Array(4);
    let currentRenderList = null;
    let currentRenderState = null;
    const renderListStack = [];
    const renderStateStack = [];
    this.domElement = canvas;
    this.debug = {
      /**
       * Enables error checking and reporting when shader programs are being compiled
       * @type {boolean}
       */
      checkShaderErrors: true,
      /**
       * Callback for custom error reporting.
       * @type {?Function}
       */
      onShaderError: null
    };
    this.autoClear = true;
    this.autoClearColor = true;
    this.autoClearDepth = true;
    this.autoClearStencil = true;
    this.sortObjects = true;
    this.clippingPlanes = [];
    this.localClippingEnabled = false;
    this._outputColorSpace = SRGBColorSpace;
    this.toneMapping = NoToneMapping;
    this.toneMappingExposure = 1;
    const _this = this;
    let _isContextLost = false;
    let _currentActiveCubeFace = 0;
    let _currentActiveMipmapLevel = 0;
    let _currentRenderTarget = null;
    let _currentMaterialId = -1;
    let _currentCamera = null;
    const _currentViewport = new Vector4();
    const _currentScissor = new Vector4();
    let _currentScissorTest = null;
    const _currentClearColor = new Color(0);
    let _currentClearAlpha = 0;
    let _width = canvas.width;
    let _height = canvas.height;
    let _pixelRatio = 1;
    let _opaqueSort = null;
    let _transparentSort = null;
    const _viewport = new Vector4(0, 0, _width, _height);
    const _scissor = new Vector4(0, 0, _width, _height);
    let _scissorTest = false;
    const _frustum = new Frustum();
    let _clippingEnabled = false;
    let _localClippingEnabled = false;
    const _currentProjectionMatrix = new Matrix4();
    const _projScreenMatrix2 = new Matrix4();
    const _vector32 = new Vector3();
    const _vector4 = new Vector4();
    const _emptyScene = { background: null, fog: null, environment: null, overrideMaterial: null, isScene: true };
    let _renderBackground = false;
    function getTargetPixelRatio() {
      return _currentRenderTarget === null ? _pixelRatio : 1;
    }
    __name(getTargetPixelRatio, "getTargetPixelRatio");
    let _gl = context;
    function getContext(contextName, contextAttributes) {
      return canvas.getContext(contextName, contextAttributes);
    }
    __name(getContext, "getContext");
    try {
      const contextAttributes = {
        alpha: true,
        depth,
        stencil,
        antialias,
        premultipliedAlpha,
        preserveDrawingBuffer,
        powerPreference,
        failIfMajorPerformanceCaveat
      };
      if ("setAttribute" in canvas) canvas.setAttribute("data-engine", `three.js r${REVISION}`);
      canvas.addEventListener("webglcontextlost", onContextLost, false);
      canvas.addEventListener("webglcontextrestored", onContextRestore, false);
      canvas.addEventListener("webglcontextcreationerror", onContextCreationError, false);
      if (_gl === null) {
        const contextName = "webgl2";
        _gl = getContext(contextName, contextAttributes);
        if (_gl === null) {
          if (getContext(contextName)) {
            throw new Error("Error creating WebGL context with your selected attributes.");
          } else {
            throw new Error("Error creating WebGL context.");
          }
        }
      }
    } catch (error) {
      console.error("THREE.WebGLRenderer: " + error.message);
      throw error;
    }
    let extensions, capabilities, state, info;
    let properties, textures, cubemaps, cubeuvmaps, attributes, geometries, objects;
    let programCache, materials, renderLists, renderStates, clipping, shadowMap;
    let background, morphtargets, bufferRenderer, indexedBufferRenderer;
    let utils, bindingStates, uniformsGroups;
    function initGLContext() {
      extensions = new WebGLExtensions(_gl);
      extensions.init();
      utils = new WebGLUtils(_gl, extensions);
      capabilities = new WebGLCapabilities(_gl, extensions, parameters, utils);
      state = new WebGLState(_gl, extensions);
      if (capabilities.reverseDepthBuffer && reverseDepthBuffer) {
        state.buffers.depth.setReversed(true);
      }
      info = new WebGLInfo(_gl);
      properties = new WebGLProperties();
      textures = new WebGLTextures(_gl, extensions, state, properties, capabilities, utils, info);
      cubemaps = new WebGLCubeMaps(_this);
      cubeuvmaps = new WebGLCubeUVMaps(_this);
      attributes = new WebGLAttributes(_gl);
      bindingStates = new WebGLBindingStates(_gl, attributes);
      geometries = new WebGLGeometries(_gl, attributes, info, bindingStates);
      objects = new WebGLObjects(_gl, geometries, attributes, info);
      morphtargets = new WebGLMorphtargets(_gl, capabilities, textures);
      clipping = new WebGLClipping(properties);
      programCache = new WebGLPrograms(_this, cubemaps, cubeuvmaps, extensions, capabilities, bindingStates, clipping);
      materials = new WebGLMaterials(_this, properties);
      renderLists = new WebGLRenderLists();
      renderStates = new WebGLRenderStates(extensions);
      background = new WebGLBackground(_this, cubemaps, cubeuvmaps, state, objects, _alpha, premultipliedAlpha);
      shadowMap = new WebGLShadowMap(_this, objects, capabilities);
      uniformsGroups = new WebGLUniformsGroups(_gl, info, capabilities, state);
      bufferRenderer = new WebGLBufferRenderer(_gl, extensions, info);
      indexedBufferRenderer = new WebGLIndexedBufferRenderer(_gl, extensions, info);
      info.programs = programCache.programs;
      _this.capabilities = capabilities;
      _this.extensions = extensions;
      _this.properties = properties;
      _this.renderLists = renderLists;
      _this.shadowMap = shadowMap;
      _this.state = state;
      _this.info = info;
    }
    __name(initGLContext, "initGLContext");
    initGLContext();
    const xr = new WebXRManager(_this, _gl);
    this.xr = xr;
    this.getContext = function() {
      return _gl;
    };
    this.getContextAttributes = function() {
      return _gl.getContextAttributes();
    };
    this.forceContextLoss = function() {
      const extension = extensions.get("WEBGL_lose_context");
      if (extension) extension.loseContext();
    };
    this.forceContextRestore = function() {
      const extension = extensions.get("WEBGL_lose_context");
      if (extension) extension.restoreContext();
    };
    this.getPixelRatio = function() {
      return _pixelRatio;
    };
    this.setPixelRatio = function(value) {
      if (value === void 0) return;
      _pixelRatio = value;
      this.setSize(_width, _height, false);
    };
    this.getSize = function(target) {
      return target.set(_width, _height);
    };
    this.setSize = function(width, height, updateStyle = true) {
      if (xr.isPresenting) {
        console.warn("THREE.WebGLRenderer: Can't change size while VR device is presenting.");
        return;
      }
      _width = width;
      _height = height;
      canvas.width = Math.floor(width * _pixelRatio);
      canvas.height = Math.floor(height * _pixelRatio);
      if (updateStyle === true) {
        canvas.style.width = width + "px";
        canvas.style.height = height + "px";
      }
      this.setViewport(0, 0, width, height);
    };
    this.getDrawingBufferSize = function(target) {
      return target.set(_width * _pixelRatio, _height * _pixelRatio).floor();
    };
    this.setDrawingBufferSize = function(width, height, pixelRatio) {
      _width = width;
      _height = height;
      _pixelRatio = pixelRatio;
      canvas.width = Math.floor(width * pixelRatio);
      canvas.height = Math.floor(height * pixelRatio);
      this.setViewport(0, 0, width, height);
    };
    this.getCurrentViewport = function(target) {
      return target.copy(_currentViewport);
    };
    this.getViewport = function(target) {
      return target.copy(_viewport);
    };
    this.setViewport = function(x, y, width, height) {
      if (x.isVector4) {
        _viewport.set(x.x, x.y, x.z, x.w);
      } else {
        _viewport.set(x, y, width, height);
      }
      state.viewport(_currentViewport.copy(_viewport).multiplyScalar(_pixelRatio).round());
    };
    this.getScissor = function(target) {
      return target.copy(_scissor);
    };
    this.setScissor = function(x, y, width, height) {
      if (x.isVector4) {
        _scissor.set(x.x, x.y, x.z, x.w);
      } else {
        _scissor.set(x, y, width, height);
      }
      state.scissor(_currentScissor.copy(_scissor).multiplyScalar(_pixelRatio).round());
    };
    this.getScissorTest = function() {
      return _scissorTest;
    };
    this.setScissorTest = function(boolean) {
      state.setScissorTest(_scissorTest = boolean);
    };
    this.setOpaqueSort = function(method) {
      _opaqueSort = method;
    };
    this.setTransparentSort = function(method) {
      _transparentSort = method;
    };
    this.getClearColor = function(target) {
      return target.copy(background.getClearColor());
    };
    this.setClearColor = function() {
      background.setClearColor.apply(background, arguments);
    };
    this.getClearAlpha = function() {
      return background.getClearAlpha();
    };
    this.setClearAlpha = function() {
      background.setClearAlpha.apply(background, arguments);
    };
    this.clear = function(color = true, depth2 = true, stencil2 = true) {
      let bits2 = 0;
      if (color) {
        let isIntegerFormat = false;
        if (_currentRenderTarget !== null) {
          const targetFormat = _currentRenderTarget.texture.format;
          isIntegerFormat = targetFormat === RGBAIntegerFormat || targetFormat === RGIntegerFormat || targetFormat === RedIntegerFormat;
        }
        if (isIntegerFormat) {
          const targetType = _currentRenderTarget.texture.type;
          const isUnsignedType = targetType === UnsignedByteType || targetType === UnsignedIntType || targetType === UnsignedShortType || targetType === UnsignedInt248Type || targetType === UnsignedShort4444Type || targetType === UnsignedShort5551Type;
          const clearColor = background.getClearColor();
          const a = background.getClearAlpha();
          const r = clearColor.r;
          const g = clearColor.g;
          const b = clearColor.b;
          if (isUnsignedType) {
            uintClearColor[0] = r;
            uintClearColor[1] = g;
            uintClearColor[2] = b;
            uintClearColor[3] = a;
            _gl.clearBufferuiv(_gl.COLOR, 0, uintClearColor);
          } else {
            intClearColor[0] = r;
            intClearColor[1] = g;
            intClearColor[2] = b;
            intClearColor[3] = a;
            _gl.clearBufferiv(_gl.COLOR, 0, intClearColor);
          }
        } else {
          bits2 |= _gl.COLOR_BUFFER_BIT;
        }
      }
      if (depth2) {
        bits2 |= _gl.DEPTH_BUFFER_BIT;
      }
      if (stencil2) {
        bits2 |= _gl.STENCIL_BUFFER_BIT;
        this.state.buffers.stencil.setMask(4294967295);
      }
      _gl.clear(bits2);
    };
    this.clearColor = function() {
      this.clear(true, false, false);
    };
    this.clearDepth = function() {
      this.clear(false, true, false);
    };
    this.clearStencil = function() {
      this.clear(false, false, true);
    };
    this.dispose = function() {
      canvas.removeEventListener("webglcontextlost", onContextLost, false);
      canvas.removeEventListener("webglcontextrestored", onContextRestore, false);
      canvas.removeEventListener("webglcontextcreationerror", onContextCreationError, false);
      renderLists.dispose();
      renderStates.dispose();
      properties.dispose();
      cubemaps.dispose();
      cubeuvmaps.dispose();
      objects.dispose();
      bindingStates.dispose();
      uniformsGroups.dispose();
      programCache.dispose();
      xr.dispose();
      xr.removeEventListener("sessionstart", onXRSessionStart);
      xr.removeEventListener("sessionend", onXRSessionEnd);
      animation.stop();
    };
    function onContextLost(event) {
      event.preventDefault();
      console.log("THREE.WebGLRenderer: Context Lost.");
      _isContextLost = true;
    }
    __name(onContextLost, "onContextLost");
    function onContextRestore() {
      console.log("THREE.WebGLRenderer: Context Restored.");
      _isContextLost = false;
      const infoAutoReset = info.autoReset;
      const shadowMapEnabled = shadowMap.enabled;
      const shadowMapAutoUpdate = shadowMap.autoUpdate;
      const shadowMapNeedsUpdate = shadowMap.needsUpdate;
      const shadowMapType = shadowMap.type;
      initGLContext();
      info.autoReset = infoAutoReset;
      shadowMap.enabled = shadowMapEnabled;
      shadowMap.autoUpdate = shadowMapAutoUpdate;
      shadowMap.needsUpdate = shadowMapNeedsUpdate;
      shadowMap.type = shadowMapType;
    }
    __name(onContextRestore, "onContextRestore");
    function onContextCreationError(event) {
      console.error("THREE.WebGLRenderer: A WebGL context could not be created. Reason: ", event.statusMessage);
    }
    __name(onContextCreationError, "onContextCreationError");
    function onMaterialDispose(event) {
      const material = event.target;
      material.removeEventListener("dispose", onMaterialDispose);
      deallocateMaterial(material);
    }
    __name(onMaterialDispose, "onMaterialDispose");
    function deallocateMaterial(material) {
      releaseMaterialProgramReferences(material);
      properties.remove(material);
    }
    __name(deallocateMaterial, "deallocateMaterial");
    function releaseMaterialProgramReferences(material) {
      const programs = properties.get(material).programs;
      if (programs !== void 0) {
        programs.forEach(function(program) {
          programCache.releaseProgram(program);
        });
        if (material.isShaderMaterial) {
          programCache.releaseShaderCache(material);
        }
      }
    }
    __name(releaseMaterialProgramReferences, "releaseMaterialProgramReferences");
    this.renderBufferDirect = function(camera, scene, geometry, material, object, group) {
      if (scene === null) scene = _emptyScene;
      const frontFaceCW = object.isMesh && object.matrixWorld.determinant() < 0;
      const program = setProgram(camera, scene, geometry, material, object);
      state.setMaterial(material, frontFaceCW);
      let index = geometry.index;
      let rangeFactor = 1;
      if (material.wireframe === true) {
        index = geometries.getWireframeAttribute(geometry);
        if (index === void 0) return;
        rangeFactor = 2;
      }
      const drawRange = geometry.drawRange;
      const position = geometry.attributes.position;
      let drawStart = drawRange.start * rangeFactor;
      let drawEnd = (drawRange.start + drawRange.count) * rangeFactor;
      if (group !== null) {
        drawStart = Math.max(drawStart, group.start * rangeFactor);
        drawEnd = Math.min(drawEnd, (group.start + group.count) * rangeFactor);
      }
      if (index !== null) {
        drawStart = Math.max(drawStart, 0);
        drawEnd = Math.min(drawEnd, index.count);
      } else if (position !== void 0 && position !== null) {
        drawStart = Math.max(drawStart, 0);
        drawEnd = Math.min(drawEnd, position.count);
      }
      const drawCount = drawEnd - drawStart;
      if (drawCount < 0 || drawCount === Infinity) return;
      bindingStates.setup(object, material, program, geometry, index);
      let attribute;
      let renderer = bufferRenderer;
      if (index !== null) {
        attribute = attributes.get(index);
        renderer = indexedBufferRenderer;
        renderer.setIndex(attribute);
      }
      if (object.isMesh) {
        if (material.wireframe === true) {
          state.setLineWidth(material.wireframeLinewidth * getTargetPixelRatio());
          renderer.setMode(_gl.LINES);
        } else {
          renderer.setMode(_gl.TRIANGLES);
        }
      } else if (object.isLine) {
        let lineWidth = material.linewidth;
        if (lineWidth === void 0) lineWidth = 1;
        state.setLineWidth(lineWidth * getTargetPixelRatio());
        if (object.isLineSegments) {
          renderer.setMode(_gl.LINES);
        } else if (object.isLineLoop) {
          renderer.setMode(_gl.LINE_LOOP);
        } else {
          renderer.setMode(_gl.LINE_STRIP);
        }
      } else if (object.isPoints) {
        renderer.setMode(_gl.POINTS);
      } else if (object.isSprite) {
        renderer.setMode(_gl.TRIANGLES);
      }
      if (object.isBatchedMesh) {
        if (object._multiDrawInstances !== null) {
          renderer.renderMultiDrawInstances(object._multiDrawStarts, object._multiDrawCounts, object._multiDrawCount, object._multiDrawInstances);
        } else {
          if (!extensions.get("WEBGL_multi_draw")) {
            const starts = object._multiDrawStarts;
            const counts = object._multiDrawCounts;
            const drawCount2 = object._multiDrawCount;
            const bytesPerElement = index ? attributes.get(index).bytesPerElement : 1;
            const uniforms = properties.get(material).currentProgram.getUniforms();
            for (let i = 0; i < drawCount2; i++) {
              uniforms.setValue(_gl, "_gl_DrawID", i);
              renderer.render(starts[i] / bytesPerElement, counts[i]);
            }
          } else {
            renderer.renderMultiDraw(object._multiDrawStarts, object._multiDrawCounts, object._multiDrawCount);
          }
        }
      } else if (object.isInstancedMesh) {
        renderer.renderInstances(drawStart, drawCount, object.count);
      } else if (geometry.isInstancedBufferGeometry) {
        const maxInstanceCount = geometry._maxInstanceCount !== void 0 ? geometry._maxInstanceCount : Infinity;
        const instanceCount = Math.min(geometry.instanceCount, maxInstanceCount);
        renderer.renderInstances(drawStart, drawCount, instanceCount);
      } else {
        renderer.render(drawStart, drawCount);
      }
    };
    function prepareMaterial(material, scene, object) {
      if (material.transparent === true && material.side === DoubleSide && material.forceSinglePass === false) {
        material.side = BackSide;
        material.needsUpdate = true;
        getProgram(material, scene, object);
        material.side = FrontSide;
        material.needsUpdate = true;
        getProgram(material, scene, object);
        material.side = DoubleSide;
      } else {
        getProgram(material, scene, object);
      }
    }
    __name(prepareMaterial, "prepareMaterial");
    this.compile = function(scene, camera, targetScene = null) {
      if (targetScene === null) targetScene = scene;
      currentRenderState = renderStates.get(targetScene);
      currentRenderState.init(camera);
      renderStateStack.push(currentRenderState);
      targetScene.traverseVisible(function(object) {
        if (object.isLight && object.layers.test(camera.layers)) {
          currentRenderState.pushLight(object);
          if (object.castShadow) {
            currentRenderState.pushShadow(object);
          }
        }
      });
      if (scene !== targetScene) {
        scene.traverseVisible(function(object) {
          if (object.isLight && object.layers.test(camera.layers)) {
            currentRenderState.pushLight(object);
            if (object.castShadow) {
              currentRenderState.pushShadow(object);
            }
          }
        });
      }
      currentRenderState.setupLights();
      const materials2 = /* @__PURE__ */ new Set();
      scene.traverse(function(object) {
        if (!(object.isMesh || object.isPoints || object.isLine || object.isSprite)) {
          return;
        }
        const material = object.material;
        if (material) {
          if (Array.isArray(material)) {
            for (let i = 0; i < material.length; i++) {
              const material2 = material[i];
              prepareMaterial(material2, targetScene, object);
              materials2.add(material2);
            }
          } else {
            prepareMaterial(material, targetScene, object);
            materials2.add(material);
          }
        }
      });
      renderStateStack.pop();
      currentRenderState = null;
      return materials2;
    };
    this.compileAsync = function(scene, camera, targetScene = null) {
      const materials2 = this.compile(scene, camera, targetScene);
      return new Promise((resolve) => {
        function checkMaterialsReady() {
          materials2.forEach(function(material) {
            const materialProperties = properties.get(material);
            const program = materialProperties.currentProgram;
            if (program.isReady()) {
              materials2.delete(material);
            }
          });
          if (materials2.size === 0) {
            resolve(scene);
            return;
          }
          setTimeout(checkMaterialsReady, 10);
        }
        __name(checkMaterialsReady, "checkMaterialsReady");
        if (extensions.get("KHR_parallel_shader_compile") !== null) {
          checkMaterialsReady();
        } else {
          setTimeout(checkMaterialsReady, 10);
        }
      });
    };
    let onAnimationFrameCallback = null;
    function onAnimationFrame(time) {
      if (onAnimationFrameCallback) onAnimationFrameCallback(time);
    }
    __name(onAnimationFrame, "onAnimationFrame");
    function onXRSessionStart() {
      animation.stop();
    }
    __name(onXRSessionStart, "onXRSessionStart");
    function onXRSessionEnd() {
      animation.start();
    }
    __name(onXRSessionEnd, "onXRSessionEnd");
    const animation = new WebGLAnimation();
    animation.setAnimationLoop(onAnimationFrame);
    if (typeof self !== "undefined") animation.setContext(self);
    this.setAnimationLoop = function(callback) {
      onAnimationFrameCallback = callback;
      xr.setAnimationLoop(callback);
      callback === null ? animation.stop() : animation.start();
    };
    xr.addEventListener("sessionstart", onXRSessionStart);
    xr.addEventListener("sessionend", onXRSessionEnd);
    this.render = function(scene, camera) {
      if (camera !== void 0 && camera.isCamera !== true) {
        console.error("THREE.WebGLRenderer.render: camera is not an instance of THREE.Camera.");
        return;
      }
      if (_isContextLost === true) return;
      if (scene.matrixWorldAutoUpdate === true) scene.updateMatrixWorld();
      if (camera.parent === null && camera.matrixWorldAutoUpdate === true) camera.updateMatrixWorld();
      if (xr.enabled === true && xr.isPresenting === true) {
        if (xr.cameraAutoUpdate === true) xr.updateCamera(camera);
        camera = xr.getCamera();
      }
      if (scene.isScene === true) scene.onBeforeRender(_this, scene, camera, _currentRenderTarget);
      currentRenderState = renderStates.get(scene, renderStateStack.length);
      currentRenderState.init(camera);
      renderStateStack.push(currentRenderState);
      _projScreenMatrix2.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);
      _frustum.setFromProjectionMatrix(_projScreenMatrix2);
      _localClippingEnabled = this.localClippingEnabled;
      _clippingEnabled = clipping.init(this.clippingPlanes, _localClippingEnabled);
      currentRenderList = renderLists.get(scene, renderListStack.length);
      currentRenderList.init();
      renderListStack.push(currentRenderList);
      if (xr.enabled === true && xr.isPresenting === true) {
        const depthSensingMesh = _this.xr.getDepthSensingMesh();
        if (depthSensingMesh !== null) {
          projectObject(depthSensingMesh, camera, -Infinity, _this.sortObjects);
        }
      }
      projectObject(scene, camera, 0, _this.sortObjects);
      currentRenderList.finish();
      if (_this.sortObjects === true) {
        currentRenderList.sort(_opaqueSort, _transparentSort);
      }
      _renderBackground = xr.enabled === false || xr.isPresenting === false || xr.hasDepthSensing() === false;
      if (_renderBackground) {
        background.addToRenderList(currentRenderList, scene);
      }
      this.info.render.frame++;
      if (_clippingEnabled === true) clipping.beginShadows();
      const shadowsArray = currentRenderState.state.shadowsArray;
      shadowMap.render(shadowsArray, scene, camera);
      if (_clippingEnabled === true) clipping.endShadows();
      if (this.info.autoReset === true) this.info.reset();
      const opaqueObjects = currentRenderList.opaque;
      const transmissiveObjects = currentRenderList.transmissive;
      currentRenderState.setupLights();
      if (camera.isArrayCamera) {
        const cameras = camera.cameras;
        if (transmissiveObjects.length > 0) {
          for (let i = 0, l = cameras.length; i < l; i++) {
            const camera2 = cameras[i];
            renderTransmissionPass(opaqueObjects, transmissiveObjects, scene, camera2);
          }
        }
        if (_renderBackground) background.render(scene);
        for (let i = 0, l = cameras.length; i < l; i++) {
          const camera2 = cameras[i];
          renderScene(currentRenderList, scene, camera2, camera2.viewport);
        }
      } else {
        if (transmissiveObjects.length > 0) renderTransmissionPass(opaqueObjects, transmissiveObjects, scene, camera);
        if (_renderBackground) background.render(scene);
        renderScene(currentRenderList, scene, camera);
      }
      if (_currentRenderTarget !== null) {
        textures.updateMultisampleRenderTarget(_currentRenderTarget);
        textures.updateRenderTargetMipmap(_currentRenderTarget);
      }
      if (scene.isScene === true) scene.onAfterRender(_this, scene, camera);
      bindingStates.resetDefaultState();
      _currentMaterialId = -1;
      _currentCamera = null;
      renderStateStack.pop();
      if (renderStateStack.length > 0) {
        currentRenderState = renderStateStack[renderStateStack.length - 1];
        if (_clippingEnabled === true) clipping.setGlobalState(_this.clippingPlanes, currentRenderState.state.camera);
      } else {
        currentRenderState = null;
      }
      renderListStack.pop();
      if (renderListStack.length > 0) {
        currentRenderList = renderListStack[renderListStack.length - 1];
      } else {
        currentRenderList = null;
      }
    };
    function projectObject(object, camera, groupOrder, sortObjects) {
      if (object.visible === false) return;
      const visible = object.layers.test(camera.layers);
      if (visible) {
        if (object.isGroup) {
          groupOrder = object.renderOrder;
        } else if (object.isLOD) {
          if (object.autoUpdate === true) object.update(camera);
        } else if (object.isLight) {
          currentRenderState.pushLight(object);
          if (object.castShadow) {
            currentRenderState.pushShadow(object);
          }
        } else if (object.isSprite) {
          if (!object.frustumCulled || _frustum.intersectsSprite(object)) {
            if (sortObjects) {
              _vector4.setFromMatrixPosition(object.matrixWorld).applyMatrix4(_projScreenMatrix2);
            }
            const geometry = objects.update(object);
            const material = object.material;
            if (material.visible) {
              currentRenderList.push(object, geometry, material, groupOrder, _vector4.z, null);
            }
          }
        } else if (object.isMesh || object.isLine || object.isPoints) {
          if (!object.frustumCulled || _frustum.intersectsObject(object)) {
            const geometry = objects.update(object);
            const material = object.material;
            if (sortObjects) {
              if (object.boundingSphere !== void 0) {
                if (object.boundingSphere === null) object.computeBoundingSphere();
                _vector4.copy(object.boundingSphere.center);
              } else {
                if (geometry.boundingSphere === null) geometry.computeBoundingSphere();
                _vector4.copy(geometry.boundingSphere.center);
              }
              _vector4.applyMatrix4(object.matrixWorld).applyMatrix4(_projScreenMatrix2);
            }
            if (Array.isArray(material)) {
              const groups = geometry.groups;
              for (let i = 0, l = groups.length; i < l; i++) {
                const group = groups[i];
                const groupMaterial = material[group.materialIndex];
                if (groupMaterial && groupMaterial.visible) {
                  currentRenderList.push(object, geometry, groupMaterial, groupOrder, _vector4.z, group);
                }
              }
            } else if (material.visible) {
              currentRenderList.push(object, geometry, material, groupOrder, _vector4.z, null);
            }
          }
        }
      }
      const children = object.children;
      for (let i = 0, l = children.length; i < l; i++) {
        projectObject(children[i], camera, groupOrder, sortObjects);
      }
    }
    __name(projectObject, "projectObject");
    function renderScene(currentRenderList2, scene, camera, viewport) {
      const opaqueObjects = currentRenderList2.opaque;
      const transmissiveObjects = currentRenderList2.transmissive;
      const transparentObjects = currentRenderList2.transparent;
      currentRenderState.setupLightsView(camera);
      if (_clippingEnabled === true) clipping.setGlobalState(_this.clippingPlanes, camera);
      if (viewport) state.viewport(_currentViewport.copy(viewport));
      if (opaqueObjects.length > 0) renderObjects(opaqueObjects, scene, camera);
      if (transmissiveObjects.length > 0) renderObjects(transmissiveObjects, scene, camera);
      if (transparentObjects.length > 0) renderObjects(transparentObjects, scene, camera);
      state.buffers.depth.setTest(true);
      state.buffers.depth.setMask(true);
      state.buffers.color.setMask(true);
      state.setPolygonOffset(false);
    }
    __name(renderScene, "renderScene");
    function renderTransmissionPass(opaqueObjects, transmissiveObjects, scene, camera) {
      const overrideMaterial = scene.isScene === true ? scene.overrideMaterial : null;
      if (overrideMaterial !== null) {
        return;
      }
      if (currentRenderState.state.transmissionRenderTarget[camera.id] === void 0) {
        currentRenderState.state.transmissionRenderTarget[camera.id] = new WebGLRenderTarget(1, 1, {
          generateMipmaps: true,
          type: extensions.has("EXT_color_buffer_half_float") || extensions.has("EXT_color_buffer_float") ? HalfFloatType : UnsignedByteType,
          minFilter: LinearMipmapLinearFilter,
          samples: 4,
          stencilBuffer: stencil,
          resolveDepthBuffer: false,
          resolveStencilBuffer: false,
          colorSpace: ColorManagement.workingColorSpace
        });
      }
      const transmissionRenderTarget = currentRenderState.state.transmissionRenderTarget[camera.id];
      const activeViewport = camera.viewport || _currentViewport;
      transmissionRenderTarget.setSize(activeViewport.z, activeViewport.w);
      const currentRenderTarget = _this.getRenderTarget();
      _this.setRenderTarget(transmissionRenderTarget);
      _this.getClearColor(_currentClearColor);
      _currentClearAlpha = _this.getClearAlpha();
      if (_currentClearAlpha < 1) _this.setClearColor(16777215, 0.5);
      _this.clear();
      if (_renderBackground) background.render(scene);
      const currentToneMapping = _this.toneMapping;
      _this.toneMapping = NoToneMapping;
      const currentCameraViewport = camera.viewport;
      if (camera.viewport !== void 0) camera.viewport = void 0;
      currentRenderState.setupLightsView(camera);
      if (_clippingEnabled === true) clipping.setGlobalState(_this.clippingPlanes, camera);
      renderObjects(opaqueObjects, scene, camera);
      textures.updateMultisampleRenderTarget(transmissionRenderTarget);
      textures.updateRenderTargetMipmap(transmissionRenderTarget);
      if (extensions.has("WEBGL_multisampled_render_to_texture") === false) {
        let renderTargetNeedsUpdate = false;
        for (let i = 0, l = transmissiveObjects.length; i < l; i++) {
          const renderItem = transmissiveObjects[i];
          const object = renderItem.object;
          const geometry = renderItem.geometry;
          const material = renderItem.material;
          const group = renderItem.group;
          if (material.side === DoubleSide && object.layers.test(camera.layers)) {
            const currentSide = material.side;
            material.side = BackSide;
            material.needsUpdate = true;
            renderObject(object, scene, camera, geometry, material, group);
            material.side = currentSide;
            material.needsUpdate = true;
            renderTargetNeedsUpdate = true;
          }
        }
        if (renderTargetNeedsUpdate === true) {
          textures.updateMultisampleRenderTarget(transmissionRenderTarget);
          textures.updateRenderTargetMipmap(transmissionRenderTarget);
        }
      }
      _this.setRenderTarget(currentRenderTarget);
      _this.setClearColor(_currentClearColor, _currentClearAlpha);
      if (currentCameraViewport !== void 0) camera.viewport = currentCameraViewport;
      _this.toneMapping = currentToneMapping;
    }
    __name(renderTransmissionPass, "renderTransmissionPass");
    function renderObjects(renderList, scene, camera) {
      const overrideMaterial = scene.isScene === true ? scene.overrideMaterial : null;
      for (let i = 0, l = renderList.length; i < l; i++) {
        const renderItem = renderList[i];
        const object = renderItem.object;
        const geometry = renderItem.geometry;
        const material = overrideMaterial === null ? renderItem.material : overrideMaterial;
        const group = renderItem.group;
        if (object.layers.test(camera.layers)) {
          renderObject(object, scene, camera, geometry, material, group);
        }
      }
    }
    __name(renderObjects, "renderObjects");
    function renderObject(object, scene, camera, geometry, material, group) {
      object.onBeforeRender(_this, scene, camera, geometry, material, group);
      object.modelViewMatrix.multiplyMatrices(camera.matrixWorldInverse, object.matrixWorld);
      object.normalMatrix.getNormalMatrix(object.modelViewMatrix);
      material.onBeforeRender(_this, scene, camera, geometry, object, group);
      if (material.transparent === true && material.side === DoubleSide && material.forceSinglePass === false) {
        material.side = BackSide;
        material.needsUpdate = true;
        _this.renderBufferDirect(camera, scene, geometry, material, object, group);
        material.side = FrontSide;
        material.needsUpdate = true;
        _this.renderBufferDirect(camera, scene, geometry, material, object, group);
        material.side = DoubleSide;
      } else {
        _this.renderBufferDirect(camera, scene, geometry, material, object, group);
      }
      object.onAfterRender(_this, scene, camera, geometry, material, group);
    }
    __name(renderObject, "renderObject");
    function getProgram(material, scene, object) {
      if (scene.isScene !== true) scene = _emptyScene;
      const materialProperties = properties.get(material);
      const lights = currentRenderState.state.lights;
      const shadowsArray = currentRenderState.state.shadowsArray;
      const lightsStateVersion = lights.state.version;
      const parameters2 = programCache.getParameters(material, lights.state, shadowsArray, scene, object);
      const programCacheKey = programCache.getProgramCacheKey(parameters2);
      let programs = materialProperties.programs;
      materialProperties.environment = material.isMeshStandardMaterial ? scene.environment : null;
      materialProperties.fog = scene.fog;
      materialProperties.envMap = (material.isMeshStandardMaterial ? cubeuvmaps : cubemaps).get(material.envMap || materialProperties.environment);
      materialProperties.envMapRotation = materialProperties.environment !== null && material.envMap === null ? scene.environmentRotation : material.envMapRotation;
      if (programs === void 0) {
        material.addEventListener("dispose", onMaterialDispose);
        programs = /* @__PURE__ */ new Map();
        materialProperties.programs = programs;
      }
      let program = programs.get(programCacheKey);
      if (program !== void 0) {
        if (materialProperties.currentProgram === program && materialProperties.lightsStateVersion === lightsStateVersion) {
          updateCommonMaterialProperties(material, parameters2);
          return program;
        }
      } else {
        parameters2.uniforms = programCache.getUniforms(material);
        material.onBeforeCompile(parameters2, _this);
        program = programCache.acquireProgram(parameters2, programCacheKey);
        programs.set(programCacheKey, program);
        materialProperties.uniforms = parameters2.uniforms;
      }
      const uniforms = materialProperties.uniforms;
      if (!material.isShaderMaterial && !material.isRawShaderMaterial || material.clipping === true) {
        uniforms.clippingPlanes = clipping.uniform;
      }
      updateCommonMaterialProperties(material, parameters2);
      materialProperties.needsLights = materialNeedsLights(material);
      materialProperties.lightsStateVersion = lightsStateVersion;
      if (materialProperties.needsLights) {
        uniforms.ambientLightColor.value = lights.state.ambient;
        uniforms.lightProbe.value = lights.state.probe;
        uniforms.directionalLights.value = lights.state.directional;
        uniforms.directionalLightShadows.value = lights.state.directionalShadow;
        uniforms.spotLights.value = lights.state.spot;
        uniforms.spotLightShadows.value = lights.state.spotShadow;
        uniforms.rectAreaLights.value = lights.state.rectArea;
        uniforms.ltc_1.value = lights.state.rectAreaLTC1;
        uniforms.ltc_2.value = lights.state.rectAreaLTC2;
        uniforms.pointLights.value = lights.state.point;
        uniforms.pointLightShadows.value = lights.state.pointShadow;
        uniforms.hemisphereLights.value = lights.state.hemi;
        uniforms.directionalShadowMap.value = lights.state.directionalShadowMap;
        uniforms.directionalShadowMatrix.value = lights.state.directionalShadowMatrix;
        uniforms.spotShadowMap.value = lights.state.spotShadowMap;
        uniforms.spotLightMatrix.value = lights.state.spotLightMatrix;
        uniforms.spotLightMap.value = lights.state.spotLightMap;
        uniforms.pointShadowMap.value = lights.state.pointShadowMap;
        uniforms.pointShadowMatrix.value = lights.state.pointShadowMatrix;
      }
      materialProperties.currentProgram = program;
      materialProperties.uniformsList = null;
      return program;
    }
    __name(getProgram, "getProgram");
    function getUniformList(materialProperties) {
      if (materialProperties.uniformsList === null) {
        const progUniforms = materialProperties.currentProgram.getUniforms();
        materialProperties.uniformsList = WebGLUniforms.seqWithValue(progUniforms.seq, materialProperties.uniforms);
      }
      return materialProperties.uniformsList;
    }
    __name(getUniformList, "getUniformList");
    function updateCommonMaterialProperties(material, parameters2) {
      const materialProperties = properties.get(material);
      materialProperties.outputColorSpace = parameters2.outputColorSpace;
      materialProperties.batching = parameters2.batching;
      materialProperties.batchingColor = parameters2.batchingColor;
      materialProperties.instancing = parameters2.instancing;
      materialProperties.instancingColor = parameters2.instancingColor;
      materialProperties.instancingMorph = parameters2.instancingMorph;
      materialProperties.skinning = parameters2.skinning;
      materialProperties.morphTargets = parameters2.morphTargets;
      materialProperties.morphNormals = parameters2.morphNormals;
      materialProperties.morphColors = parameters2.morphColors;
      materialProperties.morphTargetsCount = parameters2.morphTargetsCount;
      materialProperties.numClippingPlanes = parameters2.numClippingPlanes;
      materialProperties.numIntersection = parameters2.numClipIntersection;
      materialProperties.vertexAlphas = parameters2.vertexAlphas;
      materialProperties.vertexTangents = parameters2.vertexTangents;
      materialProperties.toneMapping = parameters2.toneMapping;
    }
    __name(updateCommonMaterialProperties, "updateCommonMaterialProperties");
    function setProgram(camera, scene, geometry, material, object) {
      if (scene.isScene !== true) scene = _emptyScene;
      textures.resetTextureUnits();
      const fog = scene.fog;
      const environment = material.isMeshStandardMaterial ? scene.environment : null;
      const colorSpace = _currentRenderTarget === null ? _this.outputColorSpace : _currentRenderTarget.isXRRenderTarget === true ? _currentRenderTarget.texture.colorSpace : LinearSRGBColorSpace;
      const envMap = (material.isMeshStandardMaterial ? cubeuvmaps : cubemaps).get(material.envMap || environment);
      const vertexAlphas = material.vertexColors === true && !!geometry.attributes.color && geometry.attributes.color.itemSize === 4;
      const vertexTangents = !!geometry.attributes.tangent && (!!material.normalMap || material.anisotropy > 0);
      const morphTargets = !!geometry.morphAttributes.position;
      const morphNormals = !!geometry.morphAttributes.normal;
      const morphColors = !!geometry.morphAttributes.color;
      let toneMapping = NoToneMapping;
      if (material.toneMapped) {
        if (_currentRenderTarget === null || _currentRenderTarget.isXRRenderTarget === true) {
          toneMapping = _this.toneMapping;
        }
      }
      const morphAttribute = geometry.morphAttributes.position || geometry.morphAttributes.normal || geometry.morphAttributes.color;
      const morphTargetsCount = morphAttribute !== void 0 ? morphAttribute.length : 0;
      const materialProperties = properties.get(material);
      const lights = currentRenderState.state.lights;
      if (_clippingEnabled === true) {
        if (_localClippingEnabled === true || camera !== _currentCamera) {
          const useCache = camera === _currentCamera && material.id === _currentMaterialId;
          clipping.setState(material, camera, useCache);
        }
      }
      let needsProgramChange = false;
      if (material.version === materialProperties.__version) {
        if (materialProperties.needsLights && materialProperties.lightsStateVersion !== lights.state.version) {
          needsProgramChange = true;
        } else if (materialProperties.outputColorSpace !== colorSpace) {
          needsProgramChange = true;
        } else if (object.isBatchedMesh && materialProperties.batching === false) {
          needsProgramChange = true;
        } else if (!object.isBatchedMesh && materialProperties.batching === true) {
          needsProgramChange = true;
        } else if (object.isBatchedMesh && materialProperties.batchingColor === true && object.colorTexture === null) {
          needsProgramChange = true;
        } else if (object.isBatchedMesh && materialProperties.batchingColor === false && object.colorTexture !== null) {
          needsProgramChange = true;
        } else if (object.isInstancedMesh && materialProperties.instancing === false) {
          needsProgramChange = true;
        } else if (!object.isInstancedMesh && materialProperties.instancing === true) {
          needsProgramChange = true;
        } else if (object.isSkinnedMesh && materialProperties.skinning === false) {
          needsProgramChange = true;
        } else if (!object.isSkinnedMesh && materialProperties.skinning === true) {
          needsProgramChange = true;
        } else if (object.isInstancedMesh && materialProperties.instancingColor === true && object.instanceColor === null) {
          needsProgramChange = true;
        } else if (object.isInstancedMesh && materialProperties.instancingColor === false && object.instanceColor !== null) {
          needsProgramChange = true;
        } else if (object.isInstancedMesh && materialProperties.instancingMorph === true && object.morphTexture === null) {
          needsProgramChange = true;
        } else if (object.isInstancedMesh && materialProperties.instancingMorph === false && object.morphTexture !== null) {
          needsProgramChange = true;
        } else if (materialProperties.envMap !== envMap) {
          needsProgramChange = true;
        } else if (material.fog === true && materialProperties.fog !== fog) {
          needsProgramChange = true;
        } else if (materialProperties.numClippingPlanes !== void 0 && (materialProperties.numClippingPlanes !== clipping.numPlanes || materialProperties.numIntersection !== clipping.numIntersection)) {
          needsProgramChange = true;
        } else if (materialProperties.vertexAlphas !== vertexAlphas) {
          needsProgramChange = true;
        } else if (materialProperties.vertexTangents !== vertexTangents) {
          needsProgramChange = true;
        } else if (materialProperties.morphTargets !== morphTargets) {
          needsProgramChange = true;
        } else if (materialProperties.morphNormals !== morphNormals) {
          needsProgramChange = true;
        } else if (materialProperties.morphColors !== morphColors) {
          needsProgramChange = true;
        } else if (materialProperties.toneMapping !== toneMapping) {
          needsProgramChange = true;
        } else if (materialProperties.morphTargetsCount !== morphTargetsCount) {
          needsProgramChange = true;
        }
      } else {
        needsProgramChange = true;
        materialProperties.__version = material.version;
      }
      let program = materialProperties.currentProgram;
      if (needsProgramChange === true) {
        program = getProgram(material, scene, object);
      }
      let refreshProgram = false;
      let refreshMaterial = false;
      let refreshLights = false;
      const p_uniforms = program.getUniforms(), m_uniforms = materialProperties.uniforms;
      if (state.useProgram(program.program)) {
        refreshProgram = true;
        refreshMaterial = true;
        refreshLights = true;
      }
      if (material.id !== _currentMaterialId) {
        _currentMaterialId = material.id;
        refreshMaterial = true;
      }
      if (refreshProgram || _currentCamera !== camera) {
        const reverseDepthBuffer2 = state.buffers.depth.getReversed();
        if (reverseDepthBuffer2) {
          _currentProjectionMatrix.copy(camera.projectionMatrix);
          toNormalizedProjectionMatrix(_currentProjectionMatrix);
          toReversedProjectionMatrix(_currentProjectionMatrix);
          p_uniforms.setValue(_gl, "projectionMatrix", _currentProjectionMatrix);
        } else {
          p_uniforms.setValue(_gl, "projectionMatrix", camera.projectionMatrix);
        }
        p_uniforms.setValue(_gl, "viewMatrix", camera.matrixWorldInverse);
        const uCamPos = p_uniforms.map.cameraPosition;
        if (uCamPos !== void 0) {
          uCamPos.setValue(_gl, _vector32.setFromMatrixPosition(camera.matrixWorld));
        }
        if (capabilities.logarithmicDepthBuffer) {
          p_uniforms.setValue(
            _gl,
            "logDepthBufFC",
            2 / (Math.log(camera.far + 1) / Math.LN2)
          );
        }
        if (material.isMeshPhongMaterial || material.isMeshToonMaterial || material.isMeshLambertMaterial || material.isMeshBasicMaterial || material.isMeshStandardMaterial || material.isShaderMaterial) {
          p_uniforms.setValue(_gl, "isOrthographic", camera.isOrthographicCamera === true);
        }
        if (_currentCamera !== camera) {
          _currentCamera = camera;
          refreshMaterial = true;
          refreshLights = true;
        }
      }
      if (object.isSkinnedMesh) {
        p_uniforms.setOptional(_gl, object, "bindMatrix");
        p_uniforms.setOptional(_gl, object, "bindMatrixInverse");
        const skeleton = object.skeleton;
        if (skeleton) {
          if (skeleton.boneTexture === null) skeleton.computeBoneTexture();
          p_uniforms.setValue(_gl, "boneTexture", skeleton.boneTexture, textures);
        }
      }
      if (object.isBatchedMesh) {
        p_uniforms.setOptional(_gl, object, "batchingTexture");
        p_uniforms.setValue(_gl, "batchingTexture", object._matricesTexture, textures);
        p_uniforms.setOptional(_gl, object, "batchingIdTexture");
        p_uniforms.setValue(_gl, "batchingIdTexture", object._indirectTexture, textures);
        p_uniforms.setOptional(_gl, object, "batchingColorTexture");
        if (object._colorsTexture !== null) {
          p_uniforms.setValue(_gl, "batchingColorTexture", object._colorsTexture, textures);
        }
      }
      const morphAttributes = geometry.morphAttributes;
      if (morphAttributes.position !== void 0 || morphAttributes.normal !== void 0 || morphAttributes.color !== void 0) {
        morphtargets.update(object, geometry, program);
      }
      if (refreshMaterial || materialProperties.receiveShadow !== object.receiveShadow) {
        materialProperties.receiveShadow = object.receiveShadow;
        p_uniforms.setValue(_gl, "receiveShadow", object.receiveShadow);
      }
      if (material.isMeshGouraudMaterial && material.envMap !== null) {
        m_uniforms.envMap.value = envMap;
        m_uniforms.flipEnvMap.value = envMap.isCubeTexture && envMap.isRenderTargetTexture === false ? -1 : 1;
      }
      if (material.isMeshStandardMaterial && material.envMap === null && scene.environment !== null) {
        m_uniforms.envMapIntensity.value = scene.environmentIntensity;
      }
      if (refreshMaterial) {
        p_uniforms.setValue(_gl, "toneMappingExposure", _this.toneMappingExposure);
        if (materialProperties.needsLights) {
          markUniformsLightsNeedsUpdate(m_uniforms, refreshLights);
        }
        if (fog && material.fog === true) {
          materials.refreshFogUniforms(m_uniforms, fog);
        }
        materials.refreshMaterialUniforms(m_uniforms, material, _pixelRatio, _height, currentRenderState.state.transmissionRenderTarget[camera.id]);
        WebGLUniforms.upload(_gl, getUniformList(materialProperties), m_uniforms, textures);
      }
      if (material.isShaderMaterial && material.uniformsNeedUpdate === true) {
        WebGLUniforms.upload(_gl, getUniformList(materialProperties), m_uniforms, textures);
        material.uniformsNeedUpdate = false;
      }
      if (material.isSpriteMaterial) {
        p_uniforms.setValue(_gl, "center", object.center);
      }
      p_uniforms.setValue(_gl, "modelViewMatrix", object.modelViewMatrix);
      p_uniforms.setValue(_gl, "normalMatrix", object.normalMatrix);
      p_uniforms.setValue(_gl, "modelMatrix", object.matrixWorld);
      if (material.isShaderMaterial || material.isRawShaderMaterial) {
        const groups = material.uniformsGroups;
        for (let i = 0, l = groups.length; i < l; i++) {
          const group = groups[i];
          uniformsGroups.update(group, program);
          uniformsGroups.bind(group, program);
        }
      }
      return program;
    }
    __name(setProgram, "setProgram");
    function markUniformsLightsNeedsUpdate(uniforms, value) {
      uniforms.ambientLightColor.needsUpdate = value;
      uniforms.lightProbe.needsUpdate = value;
      uniforms.directionalLights.needsUpdate = value;
      uniforms.directionalLightShadows.needsUpdate = value;
      uniforms.pointLights.needsUpdate = value;
      uniforms.pointLightShadows.needsUpdate = value;
      uniforms.spotLights.needsUpdate = value;
      uniforms.spotLightShadows.needsUpdate = value;
      uniforms.rectAreaLights.needsUpdate = value;
      uniforms.hemisphereLights.needsUpdate = value;
    }
    __name(markUniformsLightsNeedsUpdate, "markUniformsLightsNeedsUpdate");
    function materialNeedsLights(material) {
      return material.isMeshLambertMaterial || material.isMeshToonMaterial || material.isMeshPhongMaterial || material.isMeshStandardMaterial || material.isShadowMaterial || material.isShaderMaterial && material.lights === true;
    }
    __name(materialNeedsLights, "materialNeedsLights");
    this.getActiveCubeFace = function() {
      return _currentActiveCubeFace;
    };
    this.getActiveMipmapLevel = function() {
      return _currentActiveMipmapLevel;
    };
    this.getRenderTarget = function() {
      return _currentRenderTarget;
    };
    this.setRenderTargetTextures = function(renderTarget, colorTexture, depthTexture) {
      properties.get(renderTarget.texture).__webglTexture = colorTexture;
      properties.get(renderTarget.depthTexture).__webglTexture = depthTexture;
      const renderTargetProperties = properties.get(renderTarget);
      renderTargetProperties.__hasExternalTextures = true;
      renderTargetProperties.__autoAllocateDepthBuffer = depthTexture === void 0;
      if (!renderTargetProperties.__autoAllocateDepthBuffer) {
        if (extensions.has("WEBGL_multisampled_render_to_texture") === true) {
          console.warn("THREE.WebGLRenderer: Render-to-texture extension was disabled because an external texture was provided");
          renderTargetProperties.__useRenderToTexture = false;
        }
      }
    };
    this.setRenderTargetFramebuffer = function(renderTarget, defaultFramebuffer) {
      const renderTargetProperties = properties.get(renderTarget);
      renderTargetProperties.__webglFramebuffer = defaultFramebuffer;
      renderTargetProperties.__useDefaultFramebuffer = defaultFramebuffer === void 0;
    };
    this.setRenderTarget = function(renderTarget, activeCubeFace = 0, activeMipmapLevel = 0) {
      _currentRenderTarget = renderTarget;
      _currentActiveCubeFace = activeCubeFace;
      _currentActiveMipmapLevel = activeMipmapLevel;
      let useDefaultFramebuffer = true;
      let framebuffer = null;
      let isCube = false;
      let isRenderTarget3D = false;
      if (renderTarget) {
        const renderTargetProperties = properties.get(renderTarget);
        if (renderTargetProperties.__useDefaultFramebuffer !== void 0) {
          state.bindFramebuffer(_gl.FRAMEBUFFER, null);
          useDefaultFramebuffer = false;
        } else if (renderTargetProperties.__webglFramebuffer === void 0) {
          textures.setupRenderTarget(renderTarget);
        } else if (renderTargetProperties.__hasExternalTextures) {
          textures.rebindTextures(renderTarget, properties.get(renderTarget.texture).__webglTexture, properties.get(renderTarget.depthTexture).__webglTexture);
        } else if (renderTarget.depthBuffer) {
          const depthTexture = renderTarget.depthTexture;
          if (renderTargetProperties.__boundDepthTexture !== depthTexture) {
            if (depthTexture !== null && properties.has(depthTexture) && (renderTarget.width !== depthTexture.image.width || renderTarget.height !== depthTexture.image.height)) {
              throw new Error("WebGLRenderTarget: Attached DepthTexture is initialized to the incorrect size.");
            }
            textures.setupDepthRenderbuffer(renderTarget);
          }
        }
        const texture = renderTarget.texture;
        if (texture.isData3DTexture || texture.isDataArrayTexture || texture.isCompressedArrayTexture) {
          isRenderTarget3D = true;
        }
        const __webglFramebuffer = properties.get(renderTarget).__webglFramebuffer;
        if (renderTarget.isWebGLCubeRenderTarget) {
          if (Array.isArray(__webglFramebuffer[activeCubeFace])) {
            framebuffer = __webglFramebuffer[activeCubeFace][activeMipmapLevel];
          } else {
            framebuffer = __webglFramebuffer[activeCubeFace];
          }
          isCube = true;
        } else if (renderTarget.samples > 0 && textures.useMultisampledRTT(renderTarget) === false) {
          framebuffer = properties.get(renderTarget).__webglMultisampledFramebuffer;
        } else {
          if (Array.isArray(__webglFramebuffer)) {
            framebuffer = __webglFramebuffer[activeMipmapLevel];
          } else {
            framebuffer = __webglFramebuffer;
          }
        }
        _currentViewport.copy(renderTarget.viewport);
        _currentScissor.copy(renderTarget.scissor);
        _currentScissorTest = renderTarget.scissorTest;
      } else {
        _currentViewport.copy(_viewport).multiplyScalar(_pixelRatio).floor();
        _currentScissor.copy(_scissor).multiplyScalar(_pixelRatio).floor();
        _currentScissorTest = _scissorTest;
      }
      const framebufferBound = state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);
      if (framebufferBound && useDefaultFramebuffer) {
        state.drawBuffers(renderTarget, framebuffer);
      }
      state.viewport(_currentViewport);
      state.scissor(_currentScissor);
      state.setScissorTest(_currentScissorTest);
      if (isCube) {
        const textureProperties = properties.get(renderTarget.texture);
        _gl.framebufferTexture2D(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, _gl.TEXTURE_CUBE_MAP_POSITIVE_X + activeCubeFace, textureProperties.__webglTexture, activeMipmapLevel);
      } else if (isRenderTarget3D) {
        const textureProperties = properties.get(renderTarget.texture);
        const layer = activeCubeFace || 0;
        _gl.framebufferTextureLayer(_gl.FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, textureProperties.__webglTexture, activeMipmapLevel || 0, layer);
      }
      _currentMaterialId = -1;
    };
    this.readRenderTargetPixels = function(renderTarget, x, y, width, height, buffer, activeCubeFaceIndex) {
      if (!(renderTarget && renderTarget.isWebGLRenderTarget)) {
        console.error("THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.");
        return;
      }
      let framebuffer = properties.get(renderTarget).__webglFramebuffer;
      if (renderTarget.isWebGLCubeRenderTarget && activeCubeFaceIndex !== void 0) {
        framebuffer = framebuffer[activeCubeFaceIndex];
      }
      if (framebuffer) {
        state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);
        try {
          const texture = renderTarget.texture;
          const textureFormat = texture.format;
          const textureType = texture.type;
          if (!capabilities.textureFormatReadable(textureFormat)) {
            console.error("THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in RGBA or implementation defined format.");
            return;
          }
          if (!capabilities.textureTypeReadable(textureType)) {
            console.error("THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not in UnsignedByteType or implementation defined type.");
            return;
          }
          if (x >= 0 && x <= renderTarget.width - width && (y >= 0 && y <= renderTarget.height - height)) {
            _gl.readPixels(x, y, width, height, utils.convert(textureFormat), utils.convert(textureType), buffer);
          }
        } finally {
          const framebuffer2 = _currentRenderTarget !== null ? properties.get(_currentRenderTarget).__webglFramebuffer : null;
          state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer2);
        }
      }
    };
    this.readRenderTargetPixelsAsync = async function(renderTarget, x, y, width, height, buffer, activeCubeFaceIndex) {
      if (!(renderTarget && renderTarget.isWebGLRenderTarget)) {
        throw new Error("THREE.WebGLRenderer.readRenderTargetPixels: renderTarget is not THREE.WebGLRenderTarget.");
      }
      let framebuffer = properties.get(renderTarget).__webglFramebuffer;
      if (renderTarget.isWebGLCubeRenderTarget && activeCubeFaceIndex !== void 0) {
        framebuffer = framebuffer[activeCubeFaceIndex];
      }
      if (framebuffer) {
        const texture = renderTarget.texture;
        const textureFormat = texture.format;
        const textureType = texture.type;
        if (!capabilities.textureFormatReadable(textureFormat)) {
          throw new Error("THREE.WebGLRenderer.readRenderTargetPixelsAsync: renderTarget is not in RGBA or implementation defined format.");
        }
        if (!capabilities.textureTypeReadable(textureType)) {
          throw new Error("THREE.WebGLRenderer.readRenderTargetPixelsAsync: renderTarget is not in UnsignedByteType or implementation defined type.");
        }
        if (x >= 0 && x <= renderTarget.width - width && (y >= 0 && y <= renderTarget.height - height)) {
          state.bindFramebuffer(_gl.FRAMEBUFFER, framebuffer);
          const glBuffer = _gl.createBuffer();
          _gl.bindBuffer(_gl.PIXEL_PACK_BUFFER, glBuffer);
          _gl.bufferData(_gl.PIXEL_PACK_BUFFER, buffer.byteLength, _gl.STREAM_READ);
          _gl.readPixels(x, y, width, height, utils.convert(textureFormat), utils.convert(textureType), 0);
          const currFramebuffer = _currentRenderTarget !== null ? properties.get(_currentRenderTarget).__webglFramebuffer : null;
          state.bindFramebuffer(_gl.FRAMEBUFFER, currFramebuffer);
          const sync = _gl.fenceSync(_gl.SYNC_GPU_COMMANDS_COMPLETE, 0);
          _gl.flush();
          await probeAsync(_gl, sync, 4);
          _gl.bindBuffer(_gl.PIXEL_PACK_BUFFER, glBuffer);
          _gl.getBufferSubData(_gl.PIXEL_PACK_BUFFER, 0, buffer);
          _gl.deleteBuffer(glBuffer);
          _gl.deleteSync(sync);
          return buffer;
        } else {
          throw new Error("THREE.WebGLRenderer.readRenderTargetPixelsAsync: requested read bounds are out of range.");
        }
      }
    };
    this.copyFramebufferToTexture = function(texture, position = null, level = 0) {
      if (texture.isTexture !== true) {
        warnOnce("WebGLRenderer: copyFramebufferToTexture function signature has changed.");
        position = arguments[0] || null;
        texture = arguments[1];
      }
      const levelScale = Math.pow(2, -level);
      const width = Math.floor(texture.image.width * levelScale);
      const height = Math.floor(texture.image.height * levelScale);
      const x = position !== null ? position.x : 0;
      const y = position !== null ? position.y : 0;
      textures.setTexture2D(texture, 0);
      _gl.copyTexSubImage2D(_gl.TEXTURE_2D, level, 0, 0, x, y, width, height);
      state.unbindTexture();
    };
    this.copyTextureToTexture = function(srcTexture, dstTexture, srcRegion = null, dstPosition = null, level = 0) {
      if (srcTexture.isTexture !== true) {
        warnOnce("WebGLRenderer: copyTextureToTexture function signature has changed.");
        dstPosition = arguments[0] || null;
        srcTexture = arguments[1];
        dstTexture = arguments[2];
        level = arguments[3] || 0;
        srcRegion = null;
      }
      let width, height, depth2, minX, minY, minZ;
      let dstX, dstY, dstZ;
      const image = srcTexture.isCompressedTexture ? srcTexture.mipmaps[level] : srcTexture.image;
      if (srcRegion !== null) {
        width = srcRegion.max.x - srcRegion.min.x;
        height = srcRegion.max.y - srcRegion.min.y;
        depth2 = srcRegion.isBox3 ? srcRegion.max.z - srcRegion.min.z : 1;
        minX = srcRegion.min.x;
        minY = srcRegion.min.y;
        minZ = srcRegion.isBox3 ? srcRegion.min.z : 0;
      } else {
        width = image.width;
        height = image.height;
        depth2 = image.depth || 1;
        minX = 0;
        minY = 0;
        minZ = 0;
      }
      if (dstPosition !== null) {
        dstX = dstPosition.x;
        dstY = dstPosition.y;
        dstZ = dstPosition.z;
      } else {
        dstX = 0;
        dstY = 0;
        dstZ = 0;
      }
      const glFormat = utils.convert(dstTexture.format);
      const glType = utils.convert(dstTexture.type);
      let glTarget;
      if (dstTexture.isData3DTexture) {
        textures.setTexture3D(dstTexture, 0);
        glTarget = _gl.TEXTURE_3D;
      } else if (dstTexture.isDataArrayTexture || dstTexture.isCompressedArrayTexture) {
        textures.setTexture2DArray(dstTexture, 0);
        glTarget = _gl.TEXTURE_2D_ARRAY;
      } else {
        textures.setTexture2D(dstTexture, 0);
        glTarget = _gl.TEXTURE_2D;
      }
      _gl.pixelStorei(_gl.UNPACK_FLIP_Y_WEBGL, dstTexture.flipY);
      _gl.pixelStorei(_gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, dstTexture.premultiplyAlpha);
      _gl.pixelStorei(_gl.UNPACK_ALIGNMENT, dstTexture.unpackAlignment);
      const currentUnpackRowLen = _gl.getParameter(_gl.UNPACK_ROW_LENGTH);
      const currentUnpackImageHeight = _gl.getParameter(_gl.UNPACK_IMAGE_HEIGHT);
      const currentUnpackSkipPixels = _gl.getParameter(_gl.UNPACK_SKIP_PIXELS);
      const currentUnpackSkipRows = _gl.getParameter(_gl.UNPACK_SKIP_ROWS);
      const currentUnpackSkipImages = _gl.getParameter(_gl.UNPACK_SKIP_IMAGES);
      _gl.pixelStorei(_gl.UNPACK_ROW_LENGTH, image.width);
      _gl.pixelStorei(_gl.UNPACK_IMAGE_HEIGHT, image.height);
      _gl.pixelStorei(_gl.UNPACK_SKIP_PIXELS, minX);
      _gl.pixelStorei(_gl.UNPACK_SKIP_ROWS, minY);
      _gl.pixelStorei(_gl.UNPACK_SKIP_IMAGES, minZ);
      const isSrc3D = srcTexture.isDataArrayTexture || srcTexture.isData3DTexture;
      const isDst3D = dstTexture.isDataArrayTexture || dstTexture.isData3DTexture;
      if (srcTexture.isRenderTargetTexture || srcTexture.isDepthTexture) {
        const srcTextureProperties = properties.get(srcTexture);
        const dstTextureProperties = properties.get(dstTexture);
        const srcRenderTargetProperties = properties.get(srcTextureProperties.__renderTarget);
        const dstRenderTargetProperties = properties.get(dstTextureProperties.__renderTarget);
        state.bindFramebuffer(_gl.READ_FRAMEBUFFER, srcRenderTargetProperties.__webglFramebuffer);
        state.bindFramebuffer(_gl.DRAW_FRAMEBUFFER, dstRenderTargetProperties.__webglFramebuffer);
        for (let i = 0; i < depth2; i++) {
          if (isSrc3D) {
            _gl.framebufferTextureLayer(_gl.READ_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, properties.get(srcTexture).__webglTexture, level, minZ + i);
          }
          if (srcTexture.isDepthTexture) {
            if (isDst3D) {
              _gl.framebufferTextureLayer(_gl.DRAW_FRAMEBUFFER, _gl.COLOR_ATTACHMENT0, properties.get(dstTexture).__webglTexture, level, dstZ + i);
            }
            _gl.blitFramebuffer(minX, minY, width, height, dstX, dstY, width, height, _gl.DEPTH_BUFFER_BIT, _gl.NEAREST);
          } else if (isDst3D) {
            _gl.copyTexSubImage3D(glTarget, level, dstX, dstY, dstZ + i, minX, minY, width, height);
          } else {
            _gl.copyTexSubImage2D(glTarget, level, dstX, dstY, dstZ + i, minX, minY, width, height);
          }
        }
        state.bindFramebuffer(_gl.READ_FRAMEBUFFER, null);
        state.bindFramebuffer(_gl.DRAW_FRAMEBUFFER, null);
      } else {
        if (isDst3D) {
          if (srcTexture.isDataTexture || srcTexture.isData3DTexture) {
            _gl.texSubImage3D(glTarget, level, dstX, dstY, dstZ, width, height, depth2, glFormat, glType, image.data);
          } else if (dstTexture.isCompressedArrayTexture) {
            _gl.compressedTexSubImage3D(glTarget, level, dstX, dstY, dstZ, width, height, depth2, glFormat, image.data);
          } else {
            _gl.texSubImage3D(glTarget, level, dstX, dstY, dstZ, width, height, depth2, glFormat, glType, image);
          }
        } else {
          if (srcTexture.isDataTexture) {
            _gl.texSubImage2D(_gl.TEXTURE_2D, level, dstX, dstY, width, height, glFormat, glType, image.data);
          } else if (srcTexture.isCompressedTexture) {
            _gl.compressedTexSubImage2D(_gl.TEXTURE_2D, level, dstX, dstY, image.width, image.height, glFormat, image.data);
          } else {
            _gl.texSubImage2D(_gl.TEXTURE_2D, level, dstX, dstY, width, height, glFormat, glType, image);
          }
        }
      }
      _gl.pixelStorei(_gl.UNPACK_ROW_LENGTH, currentUnpackRowLen);
      _gl.pixelStorei(_gl.UNPACK_IMAGE_HEIGHT, currentUnpackImageHeight);
      _gl.pixelStorei(_gl.UNPACK_SKIP_PIXELS, currentUnpackSkipPixels);
      _gl.pixelStorei(_gl.UNPACK_SKIP_ROWS, currentUnpackSkipRows);
      _gl.pixelStorei(_gl.UNPACK_SKIP_IMAGES, currentUnpackSkipImages);
      if (level === 0 && dstTexture.generateMipmaps) {
        _gl.generateMipmap(glTarget);
      }
      state.unbindTexture();
    };
    this.copyTextureToTexture3D = function(srcTexture, dstTexture, srcRegion = null, dstPosition = null, level = 0) {
      if (srcTexture.isTexture !== true) {
        warnOnce("WebGLRenderer: copyTextureToTexture3D function signature has changed.");
        srcRegion = arguments[0] || null;
        dstPosition = arguments[1] || null;
        srcTexture = arguments[2];
        dstTexture = arguments[3];
        level = arguments[4] || 0;
      }
      warnOnce('WebGLRenderer: copyTextureToTexture3D function has been deprecated. Use "copyTextureToTexture" instead.');
      return this.copyTextureToTexture(srcTexture, dstTexture, srcRegion, dstPosition, level);
    };
    this.initRenderTarget = function(target) {
      if (properties.get(target).__webglFramebuffer === void 0) {
        textures.setupRenderTarget(target);
      }
    };
    this.initTexture = function(texture) {
      if (texture.isCubeTexture) {
        textures.setTextureCube(texture, 0);
      } else if (texture.isData3DTexture) {
        textures.setTexture3D(texture, 0);
      } else if (texture.isDataArrayTexture || texture.isCompressedArrayTexture) {
        textures.setTexture2DArray(texture, 0);
      } else {
        textures.setTexture2D(texture, 0);
      }
      state.unbindTexture();
    };
    this.resetState = function() {
      _currentActiveCubeFace = 0;
      _currentActiveMipmapLevel = 0;
      _currentRenderTarget = null;
      state.reset();
      bindingStates.reset();
    };
    if (typeof __THREE_DEVTOOLS__ !== "undefined") {
      __THREE_DEVTOOLS__.dispatchEvent(new CustomEvent("observe", { detail: this }));
    }
  }
  get coordinateSystem() {
    return WebGLCoordinateSystem;
  }
  get outputColorSpace() {
    return this._outputColorSpace;
  }
  set outputColorSpace(colorSpace) {
    this._outputColorSpace = colorSpace;
    const gl = this.getContext();
    gl.drawingBufferColorspace = ColorManagement._getDrawingBufferColorSpace(colorSpace);
    gl.unpackColorSpace = ColorManagement._getUnpackColorSpace();
  }
}
class Scene extends Object3D {
  static {
    __name(this, "Scene");
  }
  constructor() {
    super();
    this.isScene = true;
    this.type = "Scene";
    this.background = null;
    this.environment = null;
    this.fog = null;
    this.backgroundBlurriness = 0;
    this.backgroundIntensity = 1;
    this.backgroundRotation = new Euler();
    this.environmentIntensity = 1;
    this.environmentRotation = new Euler();
    this.overrideMaterial = null;
    if (typeof __THREE_DEVTOOLS__ !== "undefined") {
      __THREE_DEVTOOLS__.dispatchEvent(new CustomEvent("observe", { detail: this }));
    }
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    if (source.background !== null) this.background = source.background.clone();
    if (source.environment !== null) this.environment = source.environment.clone();
    if (source.fog !== null) this.fog = source.fog.clone();
    this.backgroundBlurriness = source.backgroundBlurriness;
    this.backgroundIntensity = source.backgroundIntensity;
    this.backgroundRotation.copy(source.backgroundRotation);
    this.environmentIntensity = source.environmentIntensity;
    this.environmentRotation.copy(source.environmentRotation);
    if (source.overrideMaterial !== null) this.overrideMaterial = source.overrideMaterial.clone();
    this.matrixAutoUpdate = source.matrixAutoUpdate;
    return this;
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    if (this.fog !== null) data.object.fog = this.fog.toJSON();
    if (this.backgroundBlurriness > 0) data.object.backgroundBlurriness = this.backgroundBlurriness;
    if (this.backgroundIntensity !== 1) data.object.backgroundIntensity = this.backgroundIntensity;
    data.object.backgroundRotation = this.backgroundRotation.toArray();
    if (this.environmentIntensity !== 1) data.object.environmentIntensity = this.environmentIntensity;
    data.object.environmentRotation = this.environmentRotation.toArray();
    return data;
  }
}
class InterleavedBuffer {
  static {
    __name(this, "InterleavedBuffer");
  }
  constructor(array, stride) {
    this.isInterleavedBuffer = true;
    this.array = array;
    this.stride = stride;
    this.count = array !== void 0 ? array.length / stride : 0;
    this.usage = StaticDrawUsage;
    this.updateRanges = [];
    this.version = 0;
    this.uuid = generateUUID();
  }
  onUploadCallback() {
  }
  set needsUpdate(value) {
    if (value === true) this.version++;
  }
  setUsage(value) {
    this.usage = value;
    return this;
  }
  addUpdateRange(start, count) {
    this.updateRanges.push({ start, count });
  }
  clearUpdateRanges() {
    this.updateRanges.length = 0;
  }
  copy(source) {
    this.array = new source.array.constructor(source.array);
    this.count = source.count;
    this.stride = source.stride;
    this.usage = source.usage;
    return this;
  }
  copyAt(index1, attribute, index2) {
    index1 *= this.stride;
    index2 *= attribute.stride;
    for (let i = 0, l = this.stride; i < l; i++) {
      this.array[index1 + i] = attribute.array[index2 + i];
    }
    return this;
  }
  set(value, offset = 0) {
    this.array.set(value, offset);
    return this;
  }
  clone(data) {
    if (data.arrayBuffers === void 0) {
      data.arrayBuffers = {};
    }
    if (this.array.buffer._uuid === void 0) {
      this.array.buffer._uuid = generateUUID();
    }
    if (data.arrayBuffers[this.array.buffer._uuid] === void 0) {
      data.arrayBuffers[this.array.buffer._uuid] = this.array.slice(0).buffer;
    }
    const array = new this.array.constructor(data.arrayBuffers[this.array.buffer._uuid]);
    const ib = new this.constructor(array, this.stride);
    ib.setUsage(this.usage);
    return ib;
  }
  onUpload(callback) {
    this.onUploadCallback = callback;
    return this;
  }
  toJSON(data) {
    if (data.arrayBuffers === void 0) {
      data.arrayBuffers = {};
    }
    if (this.array.buffer._uuid === void 0) {
      this.array.buffer._uuid = generateUUID();
    }
    if (data.arrayBuffers[this.array.buffer._uuid] === void 0) {
      data.arrayBuffers[this.array.buffer._uuid] = Array.from(new Uint32Array(this.array.buffer));
    }
    return {
      uuid: this.uuid,
      buffer: this.array.buffer._uuid,
      type: this.array.constructor.name,
      stride: this.stride
    };
  }
}
const _vector$6 = /* @__PURE__ */ new Vector3();
class InterleavedBufferAttribute {
  static {
    __name(this, "InterleavedBufferAttribute");
  }
  constructor(interleavedBuffer, itemSize, offset, normalized = false) {
    this.isInterleavedBufferAttribute = true;
    this.name = "";
    this.data = interleavedBuffer;
    this.itemSize = itemSize;
    this.offset = offset;
    this.normalized = normalized;
  }
  get count() {
    return this.data.count;
  }
  get array() {
    return this.data.array;
  }
  set needsUpdate(value) {
    this.data.needsUpdate = value;
  }
  applyMatrix4(m) {
    for (let i = 0, l = this.data.count; i < l; i++) {
      _vector$6.fromBufferAttribute(this, i);
      _vector$6.applyMatrix4(m);
      this.setXYZ(i, _vector$6.x, _vector$6.y, _vector$6.z);
    }
    return this;
  }
  applyNormalMatrix(m) {
    for (let i = 0, l = this.count; i < l; i++) {
      _vector$6.fromBufferAttribute(this, i);
      _vector$6.applyNormalMatrix(m);
      this.setXYZ(i, _vector$6.x, _vector$6.y, _vector$6.z);
    }
    return this;
  }
  transformDirection(m) {
    for (let i = 0, l = this.count; i < l; i++) {
      _vector$6.fromBufferAttribute(this, i);
      _vector$6.transformDirection(m);
      this.setXYZ(i, _vector$6.x, _vector$6.y, _vector$6.z);
    }
    return this;
  }
  getComponent(index, component) {
    let value = this.array[index * this.data.stride + this.offset + component];
    if (this.normalized) value = denormalize(value, this.array);
    return value;
  }
  setComponent(index, component, value) {
    if (this.normalized) value = normalize$1(value, this.array);
    this.data.array[index * this.data.stride + this.offset + component] = value;
    return this;
  }
  setX(index, x) {
    if (this.normalized) x = normalize$1(x, this.array);
    this.data.array[index * this.data.stride + this.offset] = x;
    return this;
  }
  setY(index, y) {
    if (this.normalized) y = normalize$1(y, this.array);
    this.data.array[index * this.data.stride + this.offset + 1] = y;
    return this;
  }
  setZ(index, z) {
    if (this.normalized) z = normalize$1(z, this.array);
    this.data.array[index * this.data.stride + this.offset + 2] = z;
    return this;
  }
  setW(index, w) {
    if (this.normalized) w = normalize$1(w, this.array);
    this.data.array[index * this.data.stride + this.offset + 3] = w;
    return this;
  }
  getX(index) {
    let x = this.data.array[index * this.data.stride + this.offset];
    if (this.normalized) x = denormalize(x, this.array);
    return x;
  }
  getY(index) {
    let y = this.data.array[index * this.data.stride + this.offset + 1];
    if (this.normalized) y = denormalize(y, this.array);
    return y;
  }
  getZ(index) {
    let z = this.data.array[index * this.data.stride + this.offset + 2];
    if (this.normalized) z = denormalize(z, this.array);
    return z;
  }
  getW(index) {
    let w = this.data.array[index * this.data.stride + this.offset + 3];
    if (this.normalized) w = denormalize(w, this.array);
    return w;
  }
  setXY(index, x, y) {
    index = index * this.data.stride + this.offset;
    if (this.normalized) {
      x = normalize$1(x, this.array);
      y = normalize$1(y, this.array);
    }
    this.data.array[index + 0] = x;
    this.data.array[index + 1] = y;
    return this;
  }
  setXYZ(index, x, y, z) {
    index = index * this.data.stride + this.offset;
    if (this.normalized) {
      x = normalize$1(x, this.array);
      y = normalize$1(y, this.array);
      z = normalize$1(z, this.array);
    }
    this.data.array[index + 0] = x;
    this.data.array[index + 1] = y;
    this.data.array[index + 2] = z;
    return this;
  }
  setXYZW(index, x, y, z, w) {
    index = index * this.data.stride + this.offset;
    if (this.normalized) {
      x = normalize$1(x, this.array);
      y = normalize$1(y, this.array);
      z = normalize$1(z, this.array);
      w = normalize$1(w, this.array);
    }
    this.data.array[index + 0] = x;
    this.data.array[index + 1] = y;
    this.data.array[index + 2] = z;
    this.data.array[index + 3] = w;
    return this;
  }
  clone(data) {
    if (data === void 0) {
      console.log("THREE.InterleavedBufferAttribute.clone(): Cloning an interleaved buffer attribute will de-interleave buffer data.");
      const array = [];
      for (let i = 0; i < this.count; i++) {
        const index = i * this.data.stride + this.offset;
        for (let j = 0; j < this.itemSize; j++) {
          array.push(this.data.array[index + j]);
        }
      }
      return new BufferAttribute(new this.array.constructor(array), this.itemSize, this.normalized);
    } else {
      if (data.interleavedBuffers === void 0) {
        data.interleavedBuffers = {};
      }
      if (data.interleavedBuffers[this.data.uuid] === void 0) {
        data.interleavedBuffers[this.data.uuid] = this.data.clone(data);
      }
      return new InterleavedBufferAttribute(data.interleavedBuffers[this.data.uuid], this.itemSize, this.offset, this.normalized);
    }
  }
  toJSON(data) {
    if (data === void 0) {
      console.log("THREE.InterleavedBufferAttribute.toJSON(): Serializing an interleaved buffer attribute will de-interleave buffer data.");
      const array = [];
      for (let i = 0; i < this.count; i++) {
        const index = i * this.data.stride + this.offset;
        for (let j = 0; j < this.itemSize; j++) {
          array.push(this.data.array[index + j]);
        }
      }
      return {
        itemSize: this.itemSize,
        type: this.array.constructor.name,
        array,
        normalized: this.normalized
      };
    } else {
      if (data.interleavedBuffers === void 0) {
        data.interleavedBuffers = {};
      }
      if (data.interleavedBuffers[this.data.uuid] === void 0) {
        data.interleavedBuffers[this.data.uuid] = this.data.toJSON(data);
      }
      return {
        isInterleavedBufferAttribute: true,
        itemSize: this.itemSize,
        data: this.data.uuid,
        offset: this.offset,
        normalized: this.normalized
      };
    }
  }
}
class SpriteMaterial extends Material {
  static {
    __name(this, "SpriteMaterial");
  }
  static get type() {
    return "SpriteMaterial";
  }
  constructor(parameters) {
    super();
    this.isSpriteMaterial = true;
    this.color = new Color(16777215);
    this.map = null;
    this.alphaMap = null;
    this.rotation = 0;
    this.sizeAttenuation = true;
    this.transparent = true;
    this.fog = true;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.map = source.map;
    this.alphaMap = source.alphaMap;
    this.rotation = source.rotation;
    this.sizeAttenuation = source.sizeAttenuation;
    this.fog = source.fog;
    return this;
  }
}
let _geometry$1;
const _intersectPoint = /* @__PURE__ */ new Vector3();
const _worldScale = /* @__PURE__ */ new Vector3();
const _mvPosition = /* @__PURE__ */ new Vector3();
const _alignedPosition = /* @__PURE__ */ new Vector2();
const _rotatedPosition = /* @__PURE__ */ new Vector2();
const _viewWorldMatrix = /* @__PURE__ */ new Matrix4();
const _vA$2 = /* @__PURE__ */ new Vector3();
const _vB$2 = /* @__PURE__ */ new Vector3();
const _vC$2 = /* @__PURE__ */ new Vector3();
const _uvA = /* @__PURE__ */ new Vector2();
const _uvB = /* @__PURE__ */ new Vector2();
const _uvC = /* @__PURE__ */ new Vector2();
class Sprite extends Object3D {
  static {
    __name(this, "Sprite");
  }
  constructor(material = new SpriteMaterial()) {
    super();
    this.isSprite = true;
    this.type = "Sprite";
    if (_geometry$1 === void 0) {
      _geometry$1 = new BufferGeometry();
      const float32Array = new Float32Array([
        -0.5,
        -0.5,
        0,
        0,
        0,
        0.5,
        -0.5,
        0,
        1,
        0,
        0.5,
        0.5,
        0,
        1,
        1,
        -0.5,
        0.5,
        0,
        0,
        1
      ]);
      const interleavedBuffer = new InterleavedBuffer(float32Array, 5);
      _geometry$1.setIndex([0, 1, 2, 0, 2, 3]);
      _geometry$1.setAttribute("position", new InterleavedBufferAttribute(interleavedBuffer, 3, 0, false));
      _geometry$1.setAttribute("uv", new InterleavedBufferAttribute(interleavedBuffer, 2, 3, false));
    }
    this.geometry = _geometry$1;
    this.material = material;
    this.center = new Vector2(0.5, 0.5);
  }
  raycast(raycaster, intersects2) {
    if (raycaster.camera === null) {
      console.error('THREE.Sprite: "Raycaster.camera" needs to be set in order to raycast against sprites.');
    }
    _worldScale.setFromMatrixScale(this.matrixWorld);
    _viewWorldMatrix.copy(raycaster.camera.matrixWorld);
    this.modelViewMatrix.multiplyMatrices(raycaster.camera.matrixWorldInverse, this.matrixWorld);
    _mvPosition.setFromMatrixPosition(this.modelViewMatrix);
    if (raycaster.camera.isPerspectiveCamera && this.material.sizeAttenuation === false) {
      _worldScale.multiplyScalar(-_mvPosition.z);
    }
    const rotation = this.material.rotation;
    let sin, cos;
    if (rotation !== 0) {
      cos = Math.cos(rotation);
      sin = Math.sin(rotation);
    }
    const center = this.center;
    transformVertex(_vA$2.set(-0.5, -0.5, 0), _mvPosition, center, _worldScale, sin, cos);
    transformVertex(_vB$2.set(0.5, -0.5, 0), _mvPosition, center, _worldScale, sin, cos);
    transformVertex(_vC$2.set(0.5, 0.5, 0), _mvPosition, center, _worldScale, sin, cos);
    _uvA.set(0, 0);
    _uvB.set(1, 0);
    _uvC.set(1, 1);
    let intersect2 = raycaster.ray.intersectTriangle(_vA$2, _vB$2, _vC$2, false, _intersectPoint);
    if (intersect2 === null) {
      transformVertex(_vB$2.set(-0.5, 0.5, 0), _mvPosition, center, _worldScale, sin, cos);
      _uvB.set(0, 1);
      intersect2 = raycaster.ray.intersectTriangle(_vA$2, _vC$2, _vB$2, false, _intersectPoint);
      if (intersect2 === null) {
        return;
      }
    }
    const distance = raycaster.ray.origin.distanceTo(_intersectPoint);
    if (distance < raycaster.near || distance > raycaster.far) return;
    intersects2.push({
      distance,
      point: _intersectPoint.clone(),
      uv: Triangle.getInterpolation(_intersectPoint, _vA$2, _vB$2, _vC$2, _uvA, _uvB, _uvC, new Vector2()),
      face: null,
      object: this
    });
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    if (source.center !== void 0) this.center.copy(source.center);
    this.material = source.material;
    return this;
  }
}
function transformVertex(vertexPosition, mvPosition, center, scale, sin, cos) {
  _alignedPosition.subVectors(vertexPosition, center).addScalar(0.5).multiply(scale);
  if (sin !== void 0) {
    _rotatedPosition.x = cos * _alignedPosition.x - sin * _alignedPosition.y;
    _rotatedPosition.y = sin * _alignedPosition.x + cos * _alignedPosition.y;
  } else {
    _rotatedPosition.copy(_alignedPosition);
  }
  vertexPosition.copy(mvPosition);
  vertexPosition.x += _rotatedPosition.x;
  vertexPosition.y += _rotatedPosition.y;
  vertexPosition.applyMatrix4(_viewWorldMatrix);
}
__name(transformVertex, "transformVertex");
const _basePosition = /* @__PURE__ */ new Vector3();
const _skinIndex = /* @__PURE__ */ new Vector4();
const _skinWeight = /* @__PURE__ */ new Vector4();
const _vector3 = /* @__PURE__ */ new Vector3();
const _matrix4 = /* @__PURE__ */ new Matrix4();
const _vertex = /* @__PURE__ */ new Vector3();
const _sphere$4 = /* @__PURE__ */ new Sphere();
const _inverseMatrix$2 = /* @__PURE__ */ new Matrix4();
const _ray$2 = /* @__PURE__ */ new Ray();
class SkinnedMesh extends Mesh {
  static {
    __name(this, "SkinnedMesh");
  }
  constructor(geometry, material) {
    super(geometry, material);
    this.isSkinnedMesh = true;
    this.type = "SkinnedMesh";
    this.bindMode = AttachedBindMode;
    this.bindMatrix = new Matrix4();
    this.bindMatrixInverse = new Matrix4();
    this.boundingBox = null;
    this.boundingSphere = null;
  }
  computeBoundingBox() {
    const geometry = this.geometry;
    if (this.boundingBox === null) {
      this.boundingBox = new Box3();
    }
    this.boundingBox.makeEmpty();
    const positionAttribute = geometry.getAttribute("position");
    for (let i = 0; i < positionAttribute.count; i++) {
      this.getVertexPosition(i, _vertex);
      this.boundingBox.expandByPoint(_vertex);
    }
  }
  computeBoundingSphere() {
    const geometry = this.geometry;
    if (this.boundingSphere === null) {
      this.boundingSphere = new Sphere();
    }
    this.boundingSphere.makeEmpty();
    const positionAttribute = geometry.getAttribute("position");
    for (let i = 0; i < positionAttribute.count; i++) {
      this.getVertexPosition(i, _vertex);
      this.boundingSphere.expandByPoint(_vertex);
    }
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.bindMode = source.bindMode;
    this.bindMatrix.copy(source.bindMatrix);
    this.bindMatrixInverse.copy(source.bindMatrixInverse);
    this.skeleton = source.skeleton;
    if (source.boundingBox !== null) this.boundingBox = source.boundingBox.clone();
    if (source.boundingSphere !== null) this.boundingSphere = source.boundingSphere.clone();
    return this;
  }
  raycast(raycaster, intersects2) {
    const material = this.material;
    const matrixWorld = this.matrixWorld;
    if (material === void 0) return;
    if (this.boundingSphere === null) this.computeBoundingSphere();
    _sphere$4.copy(this.boundingSphere);
    _sphere$4.applyMatrix4(matrixWorld);
    if (raycaster.ray.intersectsSphere(_sphere$4) === false) return;
    _inverseMatrix$2.copy(matrixWorld).invert();
    _ray$2.copy(raycaster.ray).applyMatrix4(_inverseMatrix$2);
    if (this.boundingBox !== null) {
      if (_ray$2.intersectsBox(this.boundingBox) === false) return;
    }
    this._computeIntersections(raycaster, intersects2, _ray$2);
  }
  getVertexPosition(index, target) {
    super.getVertexPosition(index, target);
    this.applyBoneTransform(index, target);
    return target;
  }
  bind(skeleton, bindMatrix) {
    this.skeleton = skeleton;
    if (bindMatrix === void 0) {
      this.updateMatrixWorld(true);
      this.skeleton.calculateInverses();
      bindMatrix = this.matrixWorld;
    }
    this.bindMatrix.copy(bindMatrix);
    this.bindMatrixInverse.copy(bindMatrix).invert();
  }
  pose() {
    this.skeleton.pose();
  }
  normalizeSkinWeights() {
    const vector = new Vector4();
    const skinWeight = this.geometry.attributes.skinWeight;
    for (let i = 0, l = skinWeight.count; i < l; i++) {
      vector.fromBufferAttribute(skinWeight, i);
      const scale = 1 / vector.manhattanLength();
      if (scale !== Infinity) {
        vector.multiplyScalar(scale);
      } else {
        vector.set(1, 0, 0, 0);
      }
      skinWeight.setXYZW(i, vector.x, vector.y, vector.z, vector.w);
    }
  }
  updateMatrixWorld(force) {
    super.updateMatrixWorld(force);
    if (this.bindMode === AttachedBindMode) {
      this.bindMatrixInverse.copy(this.matrixWorld).invert();
    } else if (this.bindMode === DetachedBindMode) {
      this.bindMatrixInverse.copy(this.bindMatrix).invert();
    } else {
      console.warn("THREE.SkinnedMesh: Unrecognized bindMode: " + this.bindMode);
    }
  }
  applyBoneTransform(index, vector) {
    const skeleton = this.skeleton;
    const geometry = this.geometry;
    _skinIndex.fromBufferAttribute(geometry.attributes.skinIndex, index);
    _skinWeight.fromBufferAttribute(geometry.attributes.skinWeight, index);
    _basePosition.copy(vector).applyMatrix4(this.bindMatrix);
    vector.set(0, 0, 0);
    for (let i = 0; i < 4; i++) {
      const weight = _skinWeight.getComponent(i);
      if (weight !== 0) {
        const boneIndex = _skinIndex.getComponent(i);
        _matrix4.multiplyMatrices(skeleton.bones[boneIndex].matrixWorld, skeleton.boneInverses[boneIndex]);
        vector.addScaledVector(_vector3.copy(_basePosition).applyMatrix4(_matrix4), weight);
      }
    }
    return vector.applyMatrix4(this.bindMatrixInverse);
  }
}
class Bone extends Object3D {
  static {
    __name(this, "Bone");
  }
  constructor() {
    super();
    this.isBone = true;
    this.type = "Bone";
  }
}
class DataTexture extends Texture {
  static {
    __name(this, "DataTexture");
  }
  constructor(data = null, width = 1, height = 1, format, type, mapping, wrapS, wrapT, magFilter = NearestFilter, minFilter = NearestFilter, anisotropy, colorSpace) {
    super(null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, colorSpace);
    this.isDataTexture = true;
    this.image = { data, width, height };
    this.generateMipmaps = false;
    this.flipY = false;
    this.unpackAlignment = 1;
  }
}
const _offsetMatrix = /* @__PURE__ */ new Matrix4();
const _identityMatrix$1 = /* @__PURE__ */ new Matrix4();
class Skeleton {
  static {
    __name(this, "Skeleton");
  }
  constructor(bones = [], boneInverses = []) {
    this.uuid = generateUUID();
    this.bones = bones.slice(0);
    this.boneInverses = boneInverses;
    this.boneMatrices = null;
    this.boneTexture = null;
    this.init();
  }
  init() {
    const bones = this.bones;
    const boneInverses = this.boneInverses;
    this.boneMatrices = new Float32Array(bones.length * 16);
    if (boneInverses.length === 0) {
      this.calculateInverses();
    } else {
      if (bones.length !== boneInverses.length) {
        console.warn("THREE.Skeleton: Number of inverse bone matrices does not match amount of bones.");
        this.boneInverses = [];
        for (let i = 0, il = this.bones.length; i < il; i++) {
          this.boneInverses.push(new Matrix4());
        }
      }
    }
  }
  calculateInverses() {
    this.boneInverses.length = 0;
    for (let i = 0, il = this.bones.length; i < il; i++) {
      const inverse = new Matrix4();
      if (this.bones[i]) {
        inverse.copy(this.bones[i].matrixWorld).invert();
      }
      this.boneInverses.push(inverse);
    }
  }
  pose() {
    for (let i = 0, il = this.bones.length; i < il; i++) {
      const bone = this.bones[i];
      if (bone) {
        bone.matrixWorld.copy(this.boneInverses[i]).invert();
      }
    }
    for (let i = 0, il = this.bones.length; i < il; i++) {
      const bone = this.bones[i];
      if (bone) {
        if (bone.parent && bone.parent.isBone) {
          bone.matrix.copy(bone.parent.matrixWorld).invert();
          bone.matrix.multiply(bone.matrixWorld);
        } else {
          bone.matrix.copy(bone.matrixWorld);
        }
        bone.matrix.decompose(bone.position, bone.quaternion, bone.scale);
      }
    }
  }
  update() {
    const bones = this.bones;
    const boneInverses = this.boneInverses;
    const boneMatrices = this.boneMatrices;
    const boneTexture = this.boneTexture;
    for (let i = 0, il = bones.length; i < il; i++) {
      const matrix = bones[i] ? bones[i].matrixWorld : _identityMatrix$1;
      _offsetMatrix.multiplyMatrices(matrix, boneInverses[i]);
      _offsetMatrix.toArray(boneMatrices, i * 16);
    }
    if (boneTexture !== null) {
      boneTexture.needsUpdate = true;
    }
  }
  clone() {
    return new Skeleton(this.bones, this.boneInverses);
  }
  computeBoneTexture() {
    let size = Math.sqrt(this.bones.length * 4);
    size = Math.ceil(size / 4) * 4;
    size = Math.max(size, 4);
    const boneMatrices = new Float32Array(size * size * 4);
    boneMatrices.set(this.boneMatrices);
    const boneTexture = new DataTexture(boneMatrices, size, size, RGBAFormat, FloatType);
    boneTexture.needsUpdate = true;
    this.boneMatrices = boneMatrices;
    this.boneTexture = boneTexture;
    return this;
  }
  getBoneByName(name) {
    for (let i = 0, il = this.bones.length; i < il; i++) {
      const bone = this.bones[i];
      if (bone.name === name) {
        return bone;
      }
    }
    return void 0;
  }
  dispose() {
    if (this.boneTexture !== null) {
      this.boneTexture.dispose();
      this.boneTexture = null;
    }
  }
  fromJSON(json, bones) {
    this.uuid = json.uuid;
    for (let i = 0, l = json.bones.length; i < l; i++) {
      const uuid = json.bones[i];
      let bone = bones[uuid];
      if (bone === void 0) {
        console.warn("THREE.Skeleton: No bone found with UUID:", uuid);
        bone = new Bone();
      }
      this.bones.push(bone);
      this.boneInverses.push(new Matrix4().fromArray(json.boneInverses[i]));
    }
    this.init();
    return this;
  }
  toJSON() {
    const data = {
      metadata: {
        version: 4.6,
        type: "Skeleton",
        generator: "Skeleton.toJSON"
      },
      bones: [],
      boneInverses: []
    };
    data.uuid = this.uuid;
    const bones = this.bones;
    const boneInverses = this.boneInverses;
    for (let i = 0, l = bones.length; i < l; i++) {
      const bone = bones[i];
      data.bones.push(bone.uuid);
      const boneInverse = boneInverses[i];
      data.boneInverses.push(boneInverse.toArray());
    }
    return data;
  }
}
class InstancedBufferAttribute extends BufferAttribute {
  static {
    __name(this, "InstancedBufferAttribute");
  }
  constructor(array, itemSize, normalized, meshPerAttribute = 1) {
    super(array, itemSize, normalized);
    this.isInstancedBufferAttribute = true;
    this.meshPerAttribute = meshPerAttribute;
  }
  copy(source) {
    super.copy(source);
    this.meshPerAttribute = source.meshPerAttribute;
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.meshPerAttribute = this.meshPerAttribute;
    data.isInstancedBufferAttribute = true;
    return data;
  }
}
const _instanceLocalMatrix = /* @__PURE__ */ new Matrix4();
const _instanceWorldMatrix = /* @__PURE__ */ new Matrix4();
const _instanceIntersects = [];
const _box3 = /* @__PURE__ */ new Box3();
const _identity = /* @__PURE__ */ new Matrix4();
const _mesh$1 = /* @__PURE__ */ new Mesh();
const _sphere$3 = /* @__PURE__ */ new Sphere();
class InstancedMesh extends Mesh {
  static {
    __name(this, "InstancedMesh");
  }
  constructor(geometry, material, count) {
    super(geometry, material);
    this.isInstancedMesh = true;
    this.instanceMatrix = new InstancedBufferAttribute(new Float32Array(count * 16), 16);
    this.instanceColor = null;
    this.morphTexture = null;
    this.count = count;
    this.boundingBox = null;
    this.boundingSphere = null;
    for (let i = 0; i < count; i++) {
      this.setMatrixAt(i, _identity);
    }
  }
  computeBoundingBox() {
    const geometry = this.geometry;
    const count = this.count;
    if (this.boundingBox === null) {
      this.boundingBox = new Box3();
    }
    if (geometry.boundingBox === null) {
      geometry.computeBoundingBox();
    }
    this.boundingBox.makeEmpty();
    for (let i = 0; i < count; i++) {
      this.getMatrixAt(i, _instanceLocalMatrix);
      _box3.copy(geometry.boundingBox).applyMatrix4(_instanceLocalMatrix);
      this.boundingBox.union(_box3);
    }
  }
  computeBoundingSphere() {
    const geometry = this.geometry;
    const count = this.count;
    if (this.boundingSphere === null) {
      this.boundingSphere = new Sphere();
    }
    if (geometry.boundingSphere === null) {
      geometry.computeBoundingSphere();
    }
    this.boundingSphere.makeEmpty();
    for (let i = 0; i < count; i++) {
      this.getMatrixAt(i, _instanceLocalMatrix);
      _sphere$3.copy(geometry.boundingSphere).applyMatrix4(_instanceLocalMatrix);
      this.boundingSphere.union(_sphere$3);
    }
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.instanceMatrix.copy(source.instanceMatrix);
    if (source.morphTexture !== null) this.morphTexture = source.morphTexture.clone();
    if (source.instanceColor !== null) this.instanceColor = source.instanceColor.clone();
    this.count = source.count;
    if (source.boundingBox !== null) this.boundingBox = source.boundingBox.clone();
    if (source.boundingSphere !== null) this.boundingSphere = source.boundingSphere.clone();
    return this;
  }
  getColorAt(index, color) {
    color.fromArray(this.instanceColor.array, index * 3);
  }
  getMatrixAt(index, matrix) {
    matrix.fromArray(this.instanceMatrix.array, index * 16);
  }
  getMorphAt(index, object) {
    const objectInfluences = object.morphTargetInfluences;
    const array = this.morphTexture.source.data.data;
    const len = objectInfluences.length + 1;
    const dataIndex = index * len + 1;
    for (let i = 0; i < objectInfluences.length; i++) {
      objectInfluences[i] = array[dataIndex + i];
    }
  }
  raycast(raycaster, intersects2) {
    const matrixWorld = this.matrixWorld;
    const raycastTimes = this.count;
    _mesh$1.geometry = this.geometry;
    _mesh$1.material = this.material;
    if (_mesh$1.material === void 0) return;
    if (this.boundingSphere === null) this.computeBoundingSphere();
    _sphere$3.copy(this.boundingSphere);
    _sphere$3.applyMatrix4(matrixWorld);
    if (raycaster.ray.intersectsSphere(_sphere$3) === false) return;
    for (let instanceId = 0; instanceId < raycastTimes; instanceId++) {
      this.getMatrixAt(instanceId, _instanceLocalMatrix);
      _instanceWorldMatrix.multiplyMatrices(matrixWorld, _instanceLocalMatrix);
      _mesh$1.matrixWorld = _instanceWorldMatrix;
      _mesh$1.raycast(raycaster, _instanceIntersects);
      for (let i = 0, l = _instanceIntersects.length; i < l; i++) {
        const intersect2 = _instanceIntersects[i];
        intersect2.instanceId = instanceId;
        intersect2.object = this;
        intersects2.push(intersect2);
      }
      _instanceIntersects.length = 0;
    }
  }
  setColorAt(index, color) {
    if (this.instanceColor === null) {
      this.instanceColor = new InstancedBufferAttribute(new Float32Array(this.instanceMatrix.count * 3).fill(1), 3);
    }
    color.toArray(this.instanceColor.array, index * 3);
  }
  setMatrixAt(index, matrix) {
    matrix.toArray(this.instanceMatrix.array, index * 16);
  }
  setMorphAt(index, object) {
    const objectInfluences = object.morphTargetInfluences;
    const len = objectInfluences.length + 1;
    if (this.morphTexture === null) {
      this.morphTexture = new DataTexture(new Float32Array(len * this.count), len, this.count, RedFormat, FloatType);
    }
    const array = this.morphTexture.source.data.data;
    let morphInfluencesSum = 0;
    for (let i = 0; i < objectInfluences.length; i++) {
      morphInfluencesSum += objectInfluences[i];
    }
    const morphBaseInfluence = this.geometry.morphTargetsRelative ? 1 : 1 - morphInfluencesSum;
    const dataIndex = len * index;
    array[dataIndex] = morphBaseInfluence;
    array.set(objectInfluences, dataIndex + 1);
  }
  updateMorphTargets() {
  }
  dispose() {
    this.dispatchEvent({ type: "dispose" });
    if (this.morphTexture !== null) {
      this.morphTexture.dispose();
      this.morphTexture = null;
    }
    return this;
  }
}
class LineBasicMaterial extends Material {
  static {
    __name(this, "LineBasicMaterial");
  }
  static get type() {
    return "LineBasicMaterial";
  }
  constructor(parameters) {
    super();
    this.isLineBasicMaterial = true;
    this.color = new Color(16777215);
    this.map = null;
    this.linewidth = 1;
    this.linecap = "round";
    this.linejoin = "round";
    this.fog = true;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.map = source.map;
    this.linewidth = source.linewidth;
    this.linecap = source.linecap;
    this.linejoin = source.linejoin;
    this.fog = source.fog;
    return this;
  }
}
const _vStart = /* @__PURE__ */ new Vector3();
const _vEnd = /* @__PURE__ */ new Vector3();
const _inverseMatrix$1 = /* @__PURE__ */ new Matrix4();
const _ray$1 = /* @__PURE__ */ new Ray();
const _sphere$1 = /* @__PURE__ */ new Sphere();
const _intersectPointOnRay = /* @__PURE__ */ new Vector3();
const _intersectPointOnSegment = /* @__PURE__ */ new Vector3();
class Line extends Object3D {
  static {
    __name(this, "Line");
  }
  constructor(geometry = new BufferGeometry(), material = new LineBasicMaterial()) {
    super();
    this.isLine = true;
    this.type = "Line";
    this.geometry = geometry;
    this.material = material;
    this.updateMorphTargets();
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.material = Array.isArray(source.material) ? source.material.slice() : source.material;
    this.geometry = source.geometry;
    return this;
  }
  computeLineDistances() {
    const geometry = this.geometry;
    if (geometry.index === null) {
      const positionAttribute = geometry.attributes.position;
      const lineDistances = [0];
      for (let i = 1, l = positionAttribute.count; i < l; i++) {
        _vStart.fromBufferAttribute(positionAttribute, i - 1);
        _vEnd.fromBufferAttribute(positionAttribute, i);
        lineDistances[i] = lineDistances[i - 1];
        lineDistances[i] += _vStart.distanceTo(_vEnd);
      }
      geometry.setAttribute("lineDistance", new Float32BufferAttribute(lineDistances, 1));
    } else {
      console.warn("THREE.Line.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.");
    }
    return this;
  }
  raycast(raycaster, intersects2) {
    const geometry = this.geometry;
    const matrixWorld = this.matrixWorld;
    const threshold = raycaster.params.Line.threshold;
    const drawRange = geometry.drawRange;
    if (geometry.boundingSphere === null) geometry.computeBoundingSphere();
    _sphere$1.copy(geometry.boundingSphere);
    _sphere$1.applyMatrix4(matrixWorld);
    _sphere$1.radius += threshold;
    if (raycaster.ray.intersectsSphere(_sphere$1) === false) return;
    _inverseMatrix$1.copy(matrixWorld).invert();
    _ray$1.copy(raycaster.ray).applyMatrix4(_inverseMatrix$1);
    const localThreshold = threshold / ((this.scale.x + this.scale.y + this.scale.z) / 3);
    const localThresholdSq = localThreshold * localThreshold;
    const step = this.isLineSegments ? 2 : 1;
    const index = geometry.index;
    const attributes = geometry.attributes;
    const positionAttribute = attributes.position;
    if (index !== null) {
      const start = Math.max(0, drawRange.start);
      const end = Math.min(index.count, drawRange.start + drawRange.count);
      for (let i = start, l = end - 1; i < l; i += step) {
        const a = index.getX(i);
        const b = index.getX(i + 1);
        const intersect2 = checkIntersection(this, raycaster, _ray$1, localThresholdSq, a, b);
        if (intersect2) {
          intersects2.push(intersect2);
        }
      }
      if (this.isLineLoop) {
        const a = index.getX(end - 1);
        const b = index.getX(start);
        const intersect2 = checkIntersection(this, raycaster, _ray$1, localThresholdSq, a, b);
        if (intersect2) {
          intersects2.push(intersect2);
        }
      }
    } else {
      const start = Math.max(0, drawRange.start);
      const end = Math.min(positionAttribute.count, drawRange.start + drawRange.count);
      for (let i = start, l = end - 1; i < l; i += step) {
        const intersect2 = checkIntersection(this, raycaster, _ray$1, localThresholdSq, i, i + 1);
        if (intersect2) {
          intersects2.push(intersect2);
        }
      }
      if (this.isLineLoop) {
        const intersect2 = checkIntersection(this, raycaster, _ray$1, localThresholdSq, end - 1, start);
        if (intersect2) {
          intersects2.push(intersect2);
        }
      }
    }
  }
  updateMorphTargets() {
    const geometry = this.geometry;
    const morphAttributes = geometry.morphAttributes;
    const keys = Object.keys(morphAttributes);
    if (keys.length > 0) {
      const morphAttribute = morphAttributes[keys[0]];
      if (morphAttribute !== void 0) {
        this.morphTargetInfluences = [];
        this.morphTargetDictionary = {};
        for (let m = 0, ml = morphAttribute.length; m < ml; m++) {
          const name = morphAttribute[m].name || String(m);
          this.morphTargetInfluences.push(0);
          this.morphTargetDictionary[name] = m;
        }
      }
    }
  }
}
function checkIntersection(object, raycaster, ray, thresholdSq, a, b) {
  const positionAttribute = object.geometry.attributes.position;
  _vStart.fromBufferAttribute(positionAttribute, a);
  _vEnd.fromBufferAttribute(positionAttribute, b);
  const distSq = ray.distanceSqToSegment(_vStart, _vEnd, _intersectPointOnRay, _intersectPointOnSegment);
  if (distSq > thresholdSq) return;
  _intersectPointOnRay.applyMatrix4(object.matrixWorld);
  const distance = raycaster.ray.origin.distanceTo(_intersectPointOnRay);
  if (distance < raycaster.near || distance > raycaster.far) return;
  return {
    distance,
    // What do we want? intersection point on the ray or on the segment??
    // point: raycaster.ray.at( distance ),
    point: _intersectPointOnSegment.clone().applyMatrix4(object.matrixWorld),
    index: a,
    face: null,
    faceIndex: null,
    barycoord: null,
    object
  };
}
__name(checkIntersection, "checkIntersection");
const _start = /* @__PURE__ */ new Vector3();
const _end = /* @__PURE__ */ new Vector3();
class LineSegments extends Line {
  static {
    __name(this, "LineSegments");
  }
  constructor(geometry, material) {
    super(geometry, material);
    this.isLineSegments = true;
    this.type = "LineSegments";
  }
  computeLineDistances() {
    const geometry = this.geometry;
    if (geometry.index === null) {
      const positionAttribute = geometry.attributes.position;
      const lineDistances = [];
      for (let i = 0, l = positionAttribute.count; i < l; i += 2) {
        _start.fromBufferAttribute(positionAttribute, i);
        _end.fromBufferAttribute(positionAttribute, i + 1);
        lineDistances[i] = i === 0 ? 0 : lineDistances[i - 1];
        lineDistances[i + 1] = lineDistances[i] + _start.distanceTo(_end);
      }
      geometry.setAttribute("lineDistance", new Float32BufferAttribute(lineDistances, 1));
    } else {
      console.warn("THREE.LineSegments.computeLineDistances(): Computation only possible with non-indexed BufferGeometry.");
    }
    return this;
  }
}
class LineLoop extends Line {
  static {
    __name(this, "LineLoop");
  }
  constructor(geometry, material) {
    super(geometry, material);
    this.isLineLoop = true;
    this.type = "LineLoop";
  }
}
class PointsMaterial extends Material {
  static {
    __name(this, "PointsMaterial");
  }
  static get type() {
    return "PointsMaterial";
  }
  constructor(parameters) {
    super();
    this.isPointsMaterial = true;
    this.color = new Color(16777215);
    this.map = null;
    this.alphaMap = null;
    this.size = 1;
    this.sizeAttenuation = true;
    this.fog = true;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.map = source.map;
    this.alphaMap = source.alphaMap;
    this.size = source.size;
    this.sizeAttenuation = source.sizeAttenuation;
    this.fog = source.fog;
    return this;
  }
}
const _inverseMatrix = /* @__PURE__ */ new Matrix4();
const _ray$4 = /* @__PURE__ */ new Ray();
const _sphere = /* @__PURE__ */ new Sphere();
const _position$2 = /* @__PURE__ */ new Vector3();
class Points extends Object3D {
  static {
    __name(this, "Points");
  }
  constructor(geometry = new BufferGeometry(), material = new PointsMaterial()) {
    super();
    this.isPoints = true;
    this.type = "Points";
    this.geometry = geometry;
    this.material = material;
    this.updateMorphTargets();
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.material = Array.isArray(source.material) ? source.material.slice() : source.material;
    this.geometry = source.geometry;
    return this;
  }
  raycast(raycaster, intersects2) {
    const geometry = this.geometry;
    const matrixWorld = this.matrixWorld;
    const threshold = raycaster.params.Points.threshold;
    const drawRange = geometry.drawRange;
    if (geometry.boundingSphere === null) geometry.computeBoundingSphere();
    _sphere.copy(geometry.boundingSphere);
    _sphere.applyMatrix4(matrixWorld);
    _sphere.radius += threshold;
    if (raycaster.ray.intersectsSphere(_sphere) === false) return;
    _inverseMatrix.copy(matrixWorld).invert();
    _ray$4.copy(raycaster.ray).applyMatrix4(_inverseMatrix);
    const localThreshold = threshold / ((this.scale.x + this.scale.y + this.scale.z) / 3);
    const localThresholdSq = localThreshold * localThreshold;
    const index = geometry.index;
    const attributes = geometry.attributes;
    const positionAttribute = attributes.position;
    if (index !== null) {
      const start = Math.max(0, drawRange.start);
      const end = Math.min(index.count, drawRange.start + drawRange.count);
      for (let i = start, il = end; i < il; i++) {
        const a = index.getX(i);
        _position$2.fromBufferAttribute(positionAttribute, a);
        testPoint(_position$2, a, localThresholdSq, matrixWorld, raycaster, intersects2, this);
      }
    } else {
      const start = Math.max(0, drawRange.start);
      const end = Math.min(positionAttribute.count, drawRange.start + drawRange.count);
      for (let i = start, l = end; i < l; i++) {
        _position$2.fromBufferAttribute(positionAttribute, i);
        testPoint(_position$2, i, localThresholdSq, matrixWorld, raycaster, intersects2, this);
      }
    }
  }
  updateMorphTargets() {
    const geometry = this.geometry;
    const morphAttributes = geometry.morphAttributes;
    const keys = Object.keys(morphAttributes);
    if (keys.length > 0) {
      const morphAttribute = morphAttributes[keys[0]];
      if (morphAttribute !== void 0) {
        this.morphTargetInfluences = [];
        this.morphTargetDictionary = {};
        for (let m = 0, ml = morphAttribute.length; m < ml; m++) {
          const name = morphAttribute[m].name || String(m);
          this.morphTargetInfluences.push(0);
          this.morphTargetDictionary[name] = m;
        }
      }
    }
  }
}
function testPoint(point, index, localThresholdSq, matrixWorld, raycaster, intersects2, object) {
  const rayPointDistanceSq = _ray$4.distanceSqToPoint(point);
  if (rayPointDistanceSq < localThresholdSq) {
    const intersectPoint = new Vector3();
    _ray$4.closestPointToPoint(point, intersectPoint);
    intersectPoint.applyMatrix4(matrixWorld);
    const distance = raycaster.ray.origin.distanceTo(intersectPoint);
    if (distance < raycaster.near || distance > raycaster.far) return;
    intersects2.push({
      distance,
      distanceToRay: Math.sqrt(rayPointDistanceSq),
      point: intersectPoint,
      index,
      face: null,
      faceIndex: null,
      barycoord: null,
      object
    });
  }
}
__name(testPoint, "testPoint");
class CompressedTexture extends Texture {
  static {
    __name(this, "CompressedTexture");
  }
  constructor(mipmaps, width, height, format, type, mapping, wrapS, wrapT, magFilter, minFilter, anisotropy, colorSpace) {
    super(null, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, colorSpace);
    this.isCompressedTexture = true;
    this.image = { width, height };
    this.mipmaps = mipmaps;
    this.flipY = false;
    this.generateMipmaps = false;
  }
}
class CanvasTexture extends Texture {
  static {
    __name(this, "CanvasTexture");
  }
  constructor(canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy) {
    super(canvas, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy);
    this.isCanvasTexture = true;
    this.needsUpdate = true;
  }
}
class Curve {
  static {
    __name(this, "Curve");
  }
  constructor() {
    this.type = "Curve";
    this.arcLengthDivisions = 200;
  }
  // Virtual base class method to overwrite and implement in subclasses
  //	- t [0 .. 1]
  getPoint() {
    console.warn("THREE.Curve: .getPoint() not implemented.");
    return null;
  }
  // Get point at relative position in curve according to arc length
  // - u [0 .. 1]
  getPointAt(u, optionalTarget) {
    const t = this.getUtoTmapping(u);
    return this.getPoint(t, optionalTarget);
  }
  // Get sequence of points using getPoint( t )
  getPoints(divisions = 5) {
    const points = [];
    for (let d = 0; d <= divisions; d++) {
      points.push(this.getPoint(d / divisions));
    }
    return points;
  }
  // Get sequence of points using getPointAt( u )
  getSpacedPoints(divisions = 5) {
    const points = [];
    for (let d = 0; d <= divisions; d++) {
      points.push(this.getPointAt(d / divisions));
    }
    return points;
  }
  // Get total curve arc length
  getLength() {
    const lengths = this.getLengths();
    return lengths[lengths.length - 1];
  }
  // Get list of cumulative segment lengths
  getLengths(divisions = this.arcLengthDivisions) {
    if (this.cacheArcLengths && this.cacheArcLengths.length === divisions + 1 && !this.needsUpdate) {
      return this.cacheArcLengths;
    }
    this.needsUpdate = false;
    const cache = [];
    let current, last = this.getPoint(0);
    let sum = 0;
    cache.push(0);
    for (let p = 1; p <= divisions; p++) {
      current = this.getPoint(p / divisions);
      sum += current.distanceTo(last);
      cache.push(sum);
      last = current;
    }
    this.cacheArcLengths = cache;
    return cache;
  }
  updateArcLengths() {
    this.needsUpdate = true;
    this.getLengths();
  }
  // Given u ( 0 .. 1 ), get a t to find p. This gives you points which are equidistant
  getUtoTmapping(u, distance) {
    const arcLengths = this.getLengths();
    let i = 0;
    const il = arcLengths.length;
    let targetArcLength;
    if (distance) {
      targetArcLength = distance;
    } else {
      targetArcLength = u * arcLengths[il - 1];
    }
    let low = 0, high = il - 1, comparison;
    while (low <= high) {
      i = Math.floor(low + (high - low) / 2);
      comparison = arcLengths[i] - targetArcLength;
      if (comparison < 0) {
        low = i + 1;
      } else if (comparison > 0) {
        high = i - 1;
      } else {
        high = i;
        break;
      }
    }
    i = high;
    if (arcLengths[i] === targetArcLength) {
      return i / (il - 1);
    }
    const lengthBefore = arcLengths[i];
    const lengthAfter = arcLengths[i + 1];
    const segmentLength = lengthAfter - lengthBefore;
    const segmentFraction = (targetArcLength - lengthBefore) / segmentLength;
    const t = (i + segmentFraction) / (il - 1);
    return t;
  }
  // Returns a unit vector tangent at t
  // In case any sub curve does not implement its tangent derivation,
  // 2 points a small delta apart will be used to find its gradient
  // which seems to give a reasonable approximation
  getTangent(t, optionalTarget) {
    const delta = 1e-4;
    let t1 = t - delta;
    let t2 = t + delta;
    if (t1 < 0) t1 = 0;
    if (t2 > 1) t2 = 1;
    const pt1 = this.getPoint(t1);
    const pt2 = this.getPoint(t2);
    const tangent = optionalTarget || (pt1.isVector2 ? new Vector2() : new Vector3());
    tangent.copy(pt2).sub(pt1).normalize();
    return tangent;
  }
  getTangentAt(u, optionalTarget) {
    const t = this.getUtoTmapping(u);
    return this.getTangent(t, optionalTarget);
  }
  computeFrenetFrames(segments, closed) {
    const normal = new Vector3();
    const tangents = [];
    const normals = [];
    const binormals = [];
    const vec = new Vector3();
    const mat = new Matrix4();
    for (let i = 0; i <= segments; i++) {
      const u = i / segments;
      tangents[i] = this.getTangentAt(u, new Vector3());
    }
    normals[0] = new Vector3();
    binormals[0] = new Vector3();
    let min = Number.MAX_VALUE;
    const tx = Math.abs(tangents[0].x);
    const ty = Math.abs(tangents[0].y);
    const tz = Math.abs(tangents[0].z);
    if (tx <= min) {
      min = tx;
      normal.set(1, 0, 0);
    }
    if (ty <= min) {
      min = ty;
      normal.set(0, 1, 0);
    }
    if (tz <= min) {
      normal.set(0, 0, 1);
    }
    vec.crossVectors(tangents[0], normal).normalize();
    normals[0].crossVectors(tangents[0], vec);
    binormals[0].crossVectors(tangents[0], normals[0]);
    for (let i = 1; i <= segments; i++) {
      normals[i] = normals[i - 1].clone();
      binormals[i] = binormals[i - 1].clone();
      vec.crossVectors(tangents[i - 1], tangents[i]);
      if (vec.length() > Number.EPSILON) {
        vec.normalize();
        const theta = Math.acos(clamp(tangents[i - 1].dot(tangents[i]), -1, 1));
        normals[i].applyMatrix4(mat.makeRotationAxis(vec, theta));
      }
      binormals[i].crossVectors(tangents[i], normals[i]);
    }
    if (closed === true) {
      let theta = Math.acos(clamp(normals[0].dot(normals[segments]), -1, 1));
      theta /= segments;
      if (tangents[0].dot(vec.crossVectors(normals[0], normals[segments])) > 0) {
        theta = -theta;
      }
      for (let i = 1; i <= segments; i++) {
        normals[i].applyMatrix4(mat.makeRotationAxis(tangents[i], theta * i));
        binormals[i].crossVectors(tangents[i], normals[i]);
      }
    }
    return {
      tangents,
      normals,
      binormals
    };
  }
  clone() {
    return new this.constructor().copy(this);
  }
  copy(source) {
    this.arcLengthDivisions = source.arcLengthDivisions;
    return this;
  }
  toJSON() {
    const data = {
      metadata: {
        version: 4.6,
        type: "Curve",
        generator: "Curve.toJSON"
      }
    };
    data.arcLengthDivisions = this.arcLengthDivisions;
    data.type = this.type;
    return data;
  }
  fromJSON(json) {
    this.arcLengthDivisions = json.arcLengthDivisions;
    return this;
  }
}
class CylinderGeometry extends BufferGeometry {
  static {
    __name(this, "CylinderGeometry");
  }
  constructor(radiusTop = 1, radiusBottom = 1, height = 1, radialSegments = 32, heightSegments = 1, openEnded = false, thetaStart = 0, thetaLength = Math.PI * 2) {
    super();
    this.type = "CylinderGeometry";
    this.parameters = {
      radiusTop,
      radiusBottom,
      height,
      radialSegments,
      heightSegments,
      openEnded,
      thetaStart,
      thetaLength
    };
    const scope = this;
    radialSegments = Math.floor(radialSegments);
    heightSegments = Math.floor(heightSegments);
    const indices = [];
    const vertices = [];
    const normals = [];
    const uvs = [];
    let index = 0;
    const indexArray = [];
    const halfHeight = height / 2;
    let groupStart = 0;
    generateTorso();
    if (openEnded === false) {
      if (radiusTop > 0) generateCap(true);
      if (radiusBottom > 0) generateCap(false);
    }
    this.setIndex(indices);
    this.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    this.setAttribute("normal", new Float32BufferAttribute(normals, 3));
    this.setAttribute("uv", new Float32BufferAttribute(uvs, 2));
    function generateTorso() {
      const normal = new Vector3();
      const vertex2 = new Vector3();
      let groupCount = 0;
      const slope = (radiusBottom - radiusTop) / height;
      for (let y = 0; y <= heightSegments; y++) {
        const indexRow = [];
        const v = y / heightSegments;
        const radius = v * (radiusBottom - radiusTop) + radiusTop;
        for (let x = 0; x <= radialSegments; x++) {
          const u = x / radialSegments;
          const theta = u * thetaLength + thetaStart;
          const sinTheta = Math.sin(theta);
          const cosTheta = Math.cos(theta);
          vertex2.x = radius * sinTheta;
          vertex2.y = -v * height + halfHeight;
          vertex2.z = radius * cosTheta;
          vertices.push(vertex2.x, vertex2.y, vertex2.z);
          normal.set(sinTheta, slope, cosTheta).normalize();
          normals.push(normal.x, normal.y, normal.z);
          uvs.push(u, 1 - v);
          indexRow.push(index++);
        }
        indexArray.push(indexRow);
      }
      for (let x = 0; x < radialSegments; x++) {
        for (let y = 0; y < heightSegments; y++) {
          const a = indexArray[y][x];
          const b = indexArray[y + 1][x];
          const c = indexArray[y + 1][x + 1];
          const d = indexArray[y][x + 1];
          if (radiusTop > 0 || y !== 0) {
            indices.push(a, b, d);
            groupCount += 3;
          }
          if (radiusBottom > 0 || y !== heightSegments - 1) {
            indices.push(b, c, d);
            groupCount += 3;
          }
        }
      }
      scope.addGroup(groupStart, groupCount, 0);
      groupStart += groupCount;
    }
    __name(generateTorso, "generateTorso");
    function generateCap(top) {
      const centerIndexStart = index;
      const uv = new Vector2();
      const vertex2 = new Vector3();
      let groupCount = 0;
      const radius = top === true ? radiusTop : radiusBottom;
      const sign2 = top === true ? 1 : -1;
      for (let x = 1; x <= radialSegments; x++) {
        vertices.push(0, halfHeight * sign2, 0);
        normals.push(0, sign2, 0);
        uvs.push(0.5, 0.5);
        index++;
      }
      const centerIndexEnd = index;
      for (let x = 0; x <= radialSegments; x++) {
        const u = x / radialSegments;
        const theta = u * thetaLength + thetaStart;
        const cosTheta = Math.cos(theta);
        const sinTheta = Math.sin(theta);
        vertex2.x = radius * sinTheta;
        vertex2.y = halfHeight * sign2;
        vertex2.z = radius * cosTheta;
        vertices.push(vertex2.x, vertex2.y, vertex2.z);
        normals.push(0, sign2, 0);
        uv.x = cosTheta * 0.5 + 0.5;
        uv.y = sinTheta * 0.5 * sign2 + 0.5;
        uvs.push(uv.x, uv.y);
        index++;
      }
      for (let x = 0; x < radialSegments; x++) {
        const c = centerIndexStart + x;
        const i = centerIndexEnd + x;
        if (top === true) {
          indices.push(i, i + 1, c);
        } else {
          indices.push(i + 1, i, c);
        }
        groupCount += 3;
      }
      scope.addGroup(groupStart, groupCount, top === true ? 1 : 2);
      groupStart += groupCount;
    }
    __name(generateCap, "generateCap");
  }
  copy(source) {
    super.copy(source);
    this.parameters = Object.assign({}, source.parameters);
    return this;
  }
  static fromJSON(data) {
    return new CylinderGeometry(data.radiusTop, data.radiusBottom, data.height, data.radialSegments, data.heightSegments, data.openEnded, data.thetaStart, data.thetaLength);
  }
}
const Earcut = {
  triangulate: /* @__PURE__ */ __name(function(data, holeIndices, dim = 2) {
    const hasHoles = holeIndices && holeIndices.length;
    const outerLen = hasHoles ? holeIndices[0] * dim : data.length;
    let outerNode = linkedList(data, 0, outerLen, dim, true);
    const triangles = [];
    if (!outerNode || outerNode.next === outerNode.prev) return triangles;
    let minX, minY, maxX, maxY, x, y, invSize;
    if (hasHoles) outerNode = eliminateHoles(data, holeIndices, outerNode, dim);
    if (data.length > 80 * dim) {
      minX = maxX = data[0];
      minY = maxY = data[1];
      for (let i = dim; i < outerLen; i += dim) {
        x = data[i];
        y = data[i + 1];
        if (x < minX) minX = x;
        if (y < minY) minY = y;
        if (x > maxX) maxX = x;
        if (y > maxY) maxY = y;
      }
      invSize = Math.max(maxX - minX, maxY - minY);
      invSize = invSize !== 0 ? 32767 / invSize : 0;
    }
    earcutLinked(outerNode, triangles, dim, minX, minY, invSize, 0);
    return triangles;
  }, "triangulate")
};
function linkedList(data, start, end, dim, clockwise) {
  let i, last;
  if (clockwise === signedArea(data, start, end, dim) > 0) {
    for (i = start; i < end; i += dim) last = insertNode(i, data[i], data[i + 1], last);
  } else {
    for (i = end - dim; i >= start; i -= dim) last = insertNode(i, data[i], data[i + 1], last);
  }
  if (last && equals(last, last.next)) {
    removeNode(last);
    last = last.next;
  }
  return last;
}
__name(linkedList, "linkedList");
function filterPoints(start, end) {
  if (!start) return start;
  if (!end) end = start;
  let p = start, again;
  do {
    again = false;
    if (!p.steiner && (equals(p, p.next) || area(p.prev, p, p.next) === 0)) {
      removeNode(p);
      p = end = p.prev;
      if (p === p.next) break;
      again = true;
    } else {
      p = p.next;
    }
  } while (again || p !== end);
  return end;
}
__name(filterPoints, "filterPoints");
function earcutLinked(ear, triangles, dim, minX, minY, invSize, pass) {
  if (!ear) return;
  if (!pass && invSize) indexCurve(ear, minX, minY, invSize);
  let stop = ear, prev, next;
  while (ear.prev !== ear.next) {
    prev = ear.prev;
    next = ear.next;
    if (invSize ? isEarHashed(ear, minX, minY, invSize) : isEar(ear)) {
      triangles.push(prev.i / dim | 0);
      triangles.push(ear.i / dim | 0);
      triangles.push(next.i / dim | 0);
      removeNode(ear);
      ear = next.next;
      stop = next.next;
      continue;
    }
    ear = next;
    if (ear === stop) {
      if (!pass) {
        earcutLinked(filterPoints(ear), triangles, dim, minX, minY, invSize, 1);
      } else if (pass === 1) {
        ear = cureLocalIntersections(filterPoints(ear), triangles, dim);
        earcutLinked(ear, triangles, dim, minX, minY, invSize, 2);
      } else if (pass === 2) {
        splitEarcut(ear, triangles, dim, minX, minY, invSize);
      }
      break;
    }
  }
}
__name(earcutLinked, "earcutLinked");
function isEar(ear) {
  const a = ear.prev, b = ear, c = ear.next;
  if (area(a, b, c) >= 0) return false;
  const ax = a.x, bx = b.x, cx = c.x, ay = a.y, by = b.y, cy = c.y;
  const x0 = ax < bx ? ax < cx ? ax : cx : bx < cx ? bx : cx, y0 = ay < by ? ay < cy ? ay : cy : by < cy ? by : cy, x1 = ax > bx ? ax > cx ? ax : cx : bx > cx ? bx : cx, y1 = ay > by ? ay > cy ? ay : cy : by > cy ? by : cy;
  let p = c.next;
  while (p !== a) {
    if (p.x >= x0 && p.x <= x1 && p.y >= y0 && p.y <= y1 && pointInTriangle(ax, ay, bx, by, cx, cy, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
    p = p.next;
  }
  return true;
}
__name(isEar, "isEar");
function isEarHashed(ear, minX, minY, invSize) {
  const a = ear.prev, b = ear, c = ear.next;
  if (area(a, b, c) >= 0) return false;
  const ax = a.x, bx = b.x, cx = c.x, ay = a.y, by = b.y, cy = c.y;
  const x0 = ax < bx ? ax < cx ? ax : cx : bx < cx ? bx : cx, y0 = ay < by ? ay < cy ? ay : cy : by < cy ? by : cy, x1 = ax > bx ? ax > cx ? ax : cx : bx > cx ? bx : cx, y1 = ay > by ? ay > cy ? ay : cy : by > cy ? by : cy;
  const minZ = zOrder(x0, y0, minX, minY, invSize), maxZ = zOrder(x1, y1, minX, minY, invSize);
  let p = ear.prevZ, n = ear.nextZ;
  while (p && p.z >= minZ && n && n.z <= maxZ) {
    if (p.x >= x0 && p.x <= x1 && p.y >= y0 && p.y <= y1 && p !== a && p !== c && pointInTriangle(ax, ay, bx, by, cx, cy, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
    p = p.prevZ;
    if (n.x >= x0 && n.x <= x1 && n.y >= y0 && n.y <= y1 && n !== a && n !== c && pointInTriangle(ax, ay, bx, by, cx, cy, n.x, n.y) && area(n.prev, n, n.next) >= 0) return false;
    n = n.nextZ;
  }
  while (p && p.z >= minZ) {
    if (p.x >= x0 && p.x <= x1 && p.y >= y0 && p.y <= y1 && p !== a && p !== c && pointInTriangle(ax, ay, bx, by, cx, cy, p.x, p.y) && area(p.prev, p, p.next) >= 0) return false;
    p = p.prevZ;
  }
  while (n && n.z <= maxZ) {
    if (n.x >= x0 && n.x <= x1 && n.y >= y0 && n.y <= y1 && n !== a && n !== c && pointInTriangle(ax, ay, bx, by, cx, cy, n.x, n.y) && area(n.prev, n, n.next) >= 0) return false;
    n = n.nextZ;
  }
  return true;
}
__name(isEarHashed, "isEarHashed");
function cureLocalIntersections(start, triangles, dim) {
  let p = start;
  do {
    const a = p.prev, b = p.next.next;
    if (!equals(a, b) && intersects(a, p, p.next, b) && locallyInside(a, b) && locallyInside(b, a)) {
      triangles.push(a.i / dim | 0);
      triangles.push(p.i / dim | 0);
      triangles.push(b.i / dim | 0);
      removeNode(p);
      removeNode(p.next);
      p = start = b;
    }
    p = p.next;
  } while (p !== start);
  return filterPoints(p);
}
__name(cureLocalIntersections, "cureLocalIntersections");
function splitEarcut(start, triangles, dim, minX, minY, invSize) {
  let a = start;
  do {
    let b = a.next.next;
    while (b !== a.prev) {
      if (a.i !== b.i && isValidDiagonal(a, b)) {
        let c = splitPolygon(a, b);
        a = filterPoints(a, a.next);
        c = filterPoints(c, c.next);
        earcutLinked(a, triangles, dim, minX, minY, invSize, 0);
        earcutLinked(c, triangles, dim, minX, minY, invSize, 0);
        return;
      }
      b = b.next;
    }
    a = a.next;
  } while (a !== start);
}
__name(splitEarcut, "splitEarcut");
function eliminateHoles(data, holeIndices, outerNode, dim) {
  const queue = [];
  let i, len, start, end, list;
  for (i = 0, len = holeIndices.length; i < len; i++) {
    start = holeIndices[i] * dim;
    end = i < len - 1 ? holeIndices[i + 1] * dim : data.length;
    list = linkedList(data, start, end, dim, false);
    if (list === list.next) list.steiner = true;
    queue.push(getLeftmost(list));
  }
  queue.sort(compareX);
  for (i = 0; i < queue.length; i++) {
    outerNode = eliminateHole(queue[i], outerNode);
  }
  return outerNode;
}
__name(eliminateHoles, "eliminateHoles");
function compareX(a, b) {
  return a.x - b.x;
}
__name(compareX, "compareX");
function eliminateHole(hole, outerNode) {
  const bridge = findHoleBridge(hole, outerNode);
  if (!bridge) {
    return outerNode;
  }
  const bridgeReverse = splitPolygon(bridge, hole);
  filterPoints(bridgeReverse, bridgeReverse.next);
  return filterPoints(bridge, bridge.next);
}
__name(eliminateHole, "eliminateHole");
function findHoleBridge(hole, outerNode) {
  let p = outerNode, qx = -Infinity, m;
  const hx = hole.x, hy = hole.y;
  do {
    if (hy <= p.y && hy >= p.next.y && p.next.y !== p.y) {
      const x = p.x + (hy - p.y) * (p.next.x - p.x) / (p.next.y - p.y);
      if (x <= hx && x > qx) {
        qx = x;
        m = p.x < p.next.x ? p : p.next;
        if (x === hx) return m;
      }
    }
    p = p.next;
  } while (p !== outerNode);
  if (!m) return null;
  const stop = m, mx = m.x, my = m.y;
  let tanMin = Infinity, tan;
  p = m;
  do {
    if (hx >= p.x && p.x >= mx && hx !== p.x && pointInTriangle(hy < my ? hx : qx, hy, mx, my, hy < my ? qx : hx, hy, p.x, p.y)) {
      tan = Math.abs(hy - p.y) / (hx - p.x);
      if (locallyInside(p, hole) && (tan < tanMin || tan === tanMin && (p.x > m.x || p.x === m.x && sectorContainsSector(m, p)))) {
        m = p;
        tanMin = tan;
      }
    }
    p = p.next;
  } while (p !== stop);
  return m;
}
__name(findHoleBridge, "findHoleBridge");
function sectorContainsSector(m, p) {
  return area(m.prev, m, p.prev) < 0 && area(p.next, m, m.next) < 0;
}
__name(sectorContainsSector, "sectorContainsSector");
function indexCurve(start, minX, minY, invSize) {
  let p = start;
  do {
    if (p.z === 0) p.z = zOrder(p.x, p.y, minX, minY, invSize);
    p.prevZ = p.prev;
    p.nextZ = p.next;
    p = p.next;
  } while (p !== start);
  p.prevZ.nextZ = null;
  p.prevZ = null;
  sortLinked(p);
}
__name(indexCurve, "indexCurve");
function sortLinked(list) {
  let i, p, q, e, tail, numMerges, pSize, qSize, inSize = 1;
  do {
    p = list;
    list = null;
    tail = null;
    numMerges = 0;
    while (p) {
      numMerges++;
      q = p;
      pSize = 0;
      for (i = 0; i < inSize; i++) {
        pSize++;
        q = q.nextZ;
        if (!q) break;
      }
      qSize = inSize;
      while (pSize > 0 || qSize > 0 && q) {
        if (pSize !== 0 && (qSize === 0 || !q || p.z <= q.z)) {
          e = p;
          p = p.nextZ;
          pSize--;
        } else {
          e = q;
          q = q.nextZ;
          qSize--;
        }
        if (tail) tail.nextZ = e;
        else list = e;
        e.prevZ = tail;
        tail = e;
      }
      p = q;
    }
    tail.nextZ = null;
    inSize *= 2;
  } while (numMerges > 1);
  return list;
}
__name(sortLinked, "sortLinked");
function zOrder(x, y, minX, minY, invSize) {
  x = (x - minX) * invSize | 0;
  y = (y - minY) * invSize | 0;
  x = (x | x << 8) & 16711935;
  x = (x | x << 4) & 252645135;
  x = (x | x << 2) & 858993459;
  x = (x | x << 1) & 1431655765;
  y = (y | y << 8) & 16711935;
  y = (y | y << 4) & 252645135;
  y = (y | y << 2) & 858993459;
  y = (y | y << 1) & 1431655765;
  return x | y << 1;
}
__name(zOrder, "zOrder");
function getLeftmost(start) {
  let p = start, leftmost = start;
  do {
    if (p.x < leftmost.x || p.x === leftmost.x && p.y < leftmost.y) leftmost = p;
    p = p.next;
  } while (p !== start);
  return leftmost;
}
__name(getLeftmost, "getLeftmost");
function pointInTriangle(ax, ay, bx, by, cx, cy, px, py) {
  return (cx - px) * (ay - py) >= (ax - px) * (cy - py) && (ax - px) * (by - py) >= (bx - px) * (ay - py) && (bx - px) * (cy - py) >= (cx - px) * (by - py);
}
__name(pointInTriangle, "pointInTriangle");
function isValidDiagonal(a, b) {
  return a.next.i !== b.i && a.prev.i !== b.i && !intersectsPolygon(a, b) && // dones't intersect other edges
  (locallyInside(a, b) && locallyInside(b, a) && middleInside(a, b) && // locally visible
  (area(a.prev, a, b.prev) || area(a, b.prev, b)) || // does not create opposite-facing sectors
  equals(a, b) && area(a.prev, a, a.next) > 0 && area(b.prev, b, b.next) > 0);
}
__name(isValidDiagonal, "isValidDiagonal");
function area(p, q, r) {
  return (q.y - p.y) * (r.x - q.x) - (q.x - p.x) * (r.y - q.y);
}
__name(area, "area");
function equals(p1, p2) {
  return p1.x === p2.x && p1.y === p2.y;
}
__name(equals, "equals");
function intersects(p1, q1, p2, q2) {
  const o1 = sign(area(p1, q1, p2));
  const o2 = sign(area(p1, q1, q2));
  const o3 = sign(area(p2, q2, p1));
  const o4 = sign(area(p2, q2, q1));
  if (o1 !== o2 && o3 !== o4) return true;
  if (o1 === 0 && onSegment(p1, p2, q1)) return true;
  if (o2 === 0 && onSegment(p1, q2, q1)) return true;
  if (o3 === 0 && onSegment(p2, p1, q2)) return true;
  if (o4 === 0 && onSegment(p2, q1, q2)) return true;
  return false;
}
__name(intersects, "intersects");
function onSegment(p, q, r) {
  return q.x <= Math.max(p.x, r.x) && q.x >= Math.min(p.x, r.x) && q.y <= Math.max(p.y, r.y) && q.y >= Math.min(p.y, r.y);
}
__name(onSegment, "onSegment");
function sign(num) {
  return num > 0 ? 1 : num < 0 ? -1 : 0;
}
__name(sign, "sign");
function intersectsPolygon(a, b) {
  let p = a;
  do {
    if (p.i !== a.i && p.next.i !== a.i && p.i !== b.i && p.next.i !== b.i && intersects(p, p.next, a, b)) return true;
    p = p.next;
  } while (p !== a);
  return false;
}
__name(intersectsPolygon, "intersectsPolygon");
function locallyInside(a, b) {
  return area(a.prev, a, a.next) < 0 ? area(a, b, a.next) >= 0 && area(a, a.prev, b) >= 0 : area(a, b, a.prev) < 0 || area(a, a.next, b) < 0;
}
__name(locallyInside, "locallyInside");
function middleInside(a, b) {
  let p = a, inside = false;
  const px = (a.x + b.x) / 2, py = (a.y + b.y) / 2;
  do {
    if (p.y > py !== p.next.y > py && p.next.y !== p.y && px < (p.next.x - p.x) * (py - p.y) / (p.next.y - p.y) + p.x)
      inside = !inside;
    p = p.next;
  } while (p !== a);
  return inside;
}
__name(middleInside, "middleInside");
function splitPolygon(a, b) {
  const a2 = new Node(a.i, a.x, a.y), b22 = new Node(b.i, b.x, b.y), an = a.next, bp = b.prev;
  a.next = b;
  b.prev = a;
  a2.next = an;
  an.prev = a2;
  b22.next = a2;
  a2.prev = b22;
  bp.next = b22;
  b22.prev = bp;
  return b22;
}
__name(splitPolygon, "splitPolygon");
function insertNode(i, x, y, last) {
  const p = new Node(i, x, y);
  if (!last) {
    p.prev = p;
    p.next = p;
  } else {
    p.next = last.next;
    p.prev = last;
    last.next.prev = p;
    last.next = p;
  }
  return p;
}
__name(insertNode, "insertNode");
function removeNode(p) {
  p.next.prev = p.prev;
  p.prev.next = p.next;
  if (p.prevZ) p.prevZ.nextZ = p.nextZ;
  if (p.nextZ) p.nextZ.prevZ = p.prevZ;
}
__name(removeNode, "removeNode");
function Node(i, x, y) {
  this.i = i;
  this.x = x;
  this.y = y;
  this.prev = null;
  this.next = null;
  this.z = 0;
  this.prevZ = null;
  this.nextZ = null;
  this.steiner = false;
}
__name(Node, "Node");
function signedArea(data, start, end, dim) {
  let sum = 0;
  for (let i = start, j = end - dim; i < end; i += dim) {
    sum += (data[j] - data[i]) * (data[i + 1] + data[j + 1]);
    j = i;
  }
  return sum;
}
__name(signedArea, "signedArea");
class ShapeUtils {
  static {
    __name(this, "ShapeUtils");
  }
  // calculate area of the contour polygon
  static area(contour) {
    const n = contour.length;
    let a = 0;
    for (let p = n - 1, q = 0; q < n; p = q++) {
      a += contour[p].x * contour[q].y - contour[q].x * contour[p].y;
    }
    return a * 0.5;
  }
  static isClockWise(pts) {
    return ShapeUtils.area(pts) < 0;
  }
  static triangulateShape(contour, holes) {
    const vertices = [];
    const holeIndices = [];
    const faces = [];
    removeDupEndPts(contour);
    addContour(vertices, contour);
    let holeIndex = contour.length;
    holes.forEach(removeDupEndPts);
    for (let i = 0; i < holes.length; i++) {
      holeIndices.push(holeIndex);
      holeIndex += holes[i].length;
      addContour(vertices, holes[i]);
    }
    const triangles = Earcut.triangulate(vertices, holeIndices);
    for (let i = 0; i < triangles.length; i += 3) {
      faces.push(triangles.slice(i, i + 3));
    }
    return faces;
  }
}
function removeDupEndPts(points) {
  const l = points.length;
  if (l > 2 && points[l - 1].equals(points[0])) {
    points.pop();
  }
}
__name(removeDupEndPts, "removeDupEndPts");
function addContour(vertices, contour) {
  for (let i = 0; i < contour.length; i++) {
    vertices.push(contour[i].x);
    vertices.push(contour[i].y);
  }
}
__name(addContour, "addContour");
class RawShaderMaterial extends ShaderMaterial {
  static {
    __name(this, "RawShaderMaterial");
  }
  static get type() {
    return "RawShaderMaterial";
  }
  constructor(parameters) {
    super(parameters);
    this.isRawShaderMaterial = true;
  }
}
class MeshStandardMaterial extends Material {
  static {
    __name(this, "MeshStandardMaterial");
  }
  static get type() {
    return "MeshStandardMaterial";
  }
  constructor(parameters) {
    super();
    this.isMeshStandardMaterial = true;
    this.defines = { "STANDARD": "" };
    this.color = new Color(16777215);
    this.roughness = 1;
    this.metalness = 0;
    this.map = null;
    this.lightMap = null;
    this.lightMapIntensity = 1;
    this.aoMap = null;
    this.aoMapIntensity = 1;
    this.emissive = new Color(0);
    this.emissiveIntensity = 1;
    this.emissiveMap = null;
    this.bumpMap = null;
    this.bumpScale = 1;
    this.normalMap = null;
    this.normalMapType = TangentSpaceNormalMap;
    this.normalScale = new Vector2(1, 1);
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.roughnessMap = null;
    this.metalnessMap = null;
    this.alphaMap = null;
    this.envMap = null;
    this.envMapRotation = new Euler();
    this.envMapIntensity = 1;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.wireframeLinecap = "round";
    this.wireframeLinejoin = "round";
    this.flatShading = false;
    this.fog = true;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.defines = { "STANDARD": "" };
    this.color.copy(source.color);
    this.roughness = source.roughness;
    this.metalness = source.metalness;
    this.map = source.map;
    this.lightMap = source.lightMap;
    this.lightMapIntensity = source.lightMapIntensity;
    this.aoMap = source.aoMap;
    this.aoMapIntensity = source.aoMapIntensity;
    this.emissive.copy(source.emissive);
    this.emissiveMap = source.emissiveMap;
    this.emissiveIntensity = source.emissiveIntensity;
    this.bumpMap = source.bumpMap;
    this.bumpScale = source.bumpScale;
    this.normalMap = source.normalMap;
    this.normalMapType = source.normalMapType;
    this.normalScale.copy(source.normalScale);
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.roughnessMap = source.roughnessMap;
    this.metalnessMap = source.metalnessMap;
    this.alphaMap = source.alphaMap;
    this.envMap = source.envMap;
    this.envMapRotation.copy(source.envMapRotation);
    this.envMapIntensity = source.envMapIntensity;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.wireframeLinecap = source.wireframeLinecap;
    this.wireframeLinejoin = source.wireframeLinejoin;
    this.flatShading = source.flatShading;
    this.fog = source.fog;
    return this;
  }
}
class MeshPhysicalMaterial extends MeshStandardMaterial {
  static {
    __name(this, "MeshPhysicalMaterial");
  }
  static get type() {
    return "MeshPhysicalMaterial";
  }
  constructor(parameters) {
    super();
    this.isMeshPhysicalMaterial = true;
    this.defines = {
      "STANDARD": "",
      "PHYSICAL": ""
    };
    this.anisotropyRotation = 0;
    this.anisotropyMap = null;
    this.clearcoatMap = null;
    this.clearcoatRoughness = 0;
    this.clearcoatRoughnessMap = null;
    this.clearcoatNormalScale = new Vector2(1, 1);
    this.clearcoatNormalMap = null;
    this.ior = 1.5;
    Object.defineProperty(this, "reflectivity", {
      get: /* @__PURE__ */ __name(function() {
        return clamp(2.5 * (this.ior - 1) / (this.ior + 1), 0, 1);
      }, "get"),
      set: /* @__PURE__ */ __name(function(reflectivity) {
        this.ior = (1 + 0.4 * reflectivity) / (1 - 0.4 * reflectivity);
      }, "set")
    });
    this.iridescenceMap = null;
    this.iridescenceIOR = 1.3;
    this.iridescenceThicknessRange = [100, 400];
    this.iridescenceThicknessMap = null;
    this.sheenColor = new Color(0);
    this.sheenColorMap = null;
    this.sheenRoughness = 1;
    this.sheenRoughnessMap = null;
    this.transmissionMap = null;
    this.thickness = 0;
    this.thicknessMap = null;
    this.attenuationDistance = Infinity;
    this.attenuationColor = new Color(1, 1, 1);
    this.specularIntensity = 1;
    this.specularIntensityMap = null;
    this.specularColor = new Color(1, 1, 1);
    this.specularColorMap = null;
    this._anisotropy = 0;
    this._clearcoat = 0;
    this._dispersion = 0;
    this._iridescence = 0;
    this._sheen = 0;
    this._transmission = 0;
    this.setValues(parameters);
  }
  get anisotropy() {
    return this._anisotropy;
  }
  set anisotropy(value) {
    if (this._anisotropy > 0 !== value > 0) {
      this.version++;
    }
    this._anisotropy = value;
  }
  get clearcoat() {
    return this._clearcoat;
  }
  set clearcoat(value) {
    if (this._clearcoat > 0 !== value > 0) {
      this.version++;
    }
    this._clearcoat = value;
  }
  get iridescence() {
    return this._iridescence;
  }
  set iridescence(value) {
    if (this._iridescence > 0 !== value > 0) {
      this.version++;
    }
    this._iridescence = value;
  }
  get dispersion() {
    return this._dispersion;
  }
  set dispersion(value) {
    if (this._dispersion > 0 !== value > 0) {
      this.version++;
    }
    this._dispersion = value;
  }
  get sheen() {
    return this._sheen;
  }
  set sheen(value) {
    if (this._sheen > 0 !== value > 0) {
      this.version++;
    }
    this._sheen = value;
  }
  get transmission() {
    return this._transmission;
  }
  set transmission(value) {
    if (this._transmission > 0 !== value > 0) {
      this.version++;
    }
    this._transmission = value;
  }
  copy(source) {
    super.copy(source);
    this.defines = {
      "STANDARD": "",
      "PHYSICAL": ""
    };
    this.anisotropy = source.anisotropy;
    this.anisotropyRotation = source.anisotropyRotation;
    this.anisotropyMap = source.anisotropyMap;
    this.clearcoat = source.clearcoat;
    this.clearcoatMap = source.clearcoatMap;
    this.clearcoatRoughness = source.clearcoatRoughness;
    this.clearcoatRoughnessMap = source.clearcoatRoughnessMap;
    this.clearcoatNormalMap = source.clearcoatNormalMap;
    this.clearcoatNormalScale.copy(source.clearcoatNormalScale);
    this.dispersion = source.dispersion;
    this.ior = source.ior;
    this.iridescence = source.iridescence;
    this.iridescenceMap = source.iridescenceMap;
    this.iridescenceIOR = source.iridescenceIOR;
    this.iridescenceThicknessRange = [...source.iridescenceThicknessRange];
    this.iridescenceThicknessMap = source.iridescenceThicknessMap;
    this.sheen = source.sheen;
    this.sheenColor.copy(source.sheenColor);
    this.sheenColorMap = source.sheenColorMap;
    this.sheenRoughness = source.sheenRoughness;
    this.sheenRoughnessMap = source.sheenRoughnessMap;
    this.transmission = source.transmission;
    this.transmissionMap = source.transmissionMap;
    this.thickness = source.thickness;
    this.thicknessMap = source.thicknessMap;
    this.attenuationDistance = source.attenuationDistance;
    this.attenuationColor.copy(source.attenuationColor);
    this.specularIntensity = source.specularIntensity;
    this.specularIntensityMap = source.specularIntensityMap;
    this.specularColor.copy(source.specularColor);
    this.specularColorMap = source.specularColorMap;
    return this;
  }
}
class MeshPhongMaterial extends Material {
  static {
    __name(this, "MeshPhongMaterial");
  }
  static get type() {
    return "MeshPhongMaterial";
  }
  constructor(parameters) {
    super();
    this.isMeshPhongMaterial = true;
    this.color = new Color(16777215);
    this.specular = new Color(1118481);
    this.shininess = 30;
    this.map = null;
    this.lightMap = null;
    this.lightMapIntensity = 1;
    this.aoMap = null;
    this.aoMapIntensity = 1;
    this.emissive = new Color(0);
    this.emissiveIntensity = 1;
    this.emissiveMap = null;
    this.bumpMap = null;
    this.bumpScale = 1;
    this.normalMap = null;
    this.normalMapType = TangentSpaceNormalMap;
    this.normalScale = new Vector2(1, 1);
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.specularMap = null;
    this.alphaMap = null;
    this.envMap = null;
    this.envMapRotation = new Euler();
    this.combine = MultiplyOperation;
    this.reflectivity = 1;
    this.refractionRatio = 0.98;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.wireframeLinecap = "round";
    this.wireframeLinejoin = "round";
    this.flatShading = false;
    this.fog = true;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.specular.copy(source.specular);
    this.shininess = source.shininess;
    this.map = source.map;
    this.lightMap = source.lightMap;
    this.lightMapIntensity = source.lightMapIntensity;
    this.aoMap = source.aoMap;
    this.aoMapIntensity = source.aoMapIntensity;
    this.emissive.copy(source.emissive);
    this.emissiveMap = source.emissiveMap;
    this.emissiveIntensity = source.emissiveIntensity;
    this.bumpMap = source.bumpMap;
    this.bumpScale = source.bumpScale;
    this.normalMap = source.normalMap;
    this.normalMapType = source.normalMapType;
    this.normalScale.copy(source.normalScale);
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.specularMap = source.specularMap;
    this.alphaMap = source.alphaMap;
    this.envMap = source.envMap;
    this.envMapRotation.copy(source.envMapRotation);
    this.combine = source.combine;
    this.reflectivity = source.reflectivity;
    this.refractionRatio = source.refractionRatio;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.wireframeLinecap = source.wireframeLinecap;
    this.wireframeLinejoin = source.wireframeLinejoin;
    this.flatShading = source.flatShading;
    this.fog = source.fog;
    return this;
  }
}
class MeshNormalMaterial extends Material {
  static {
    __name(this, "MeshNormalMaterial");
  }
  static get type() {
    return "MeshNormalMaterial";
  }
  constructor(parameters) {
    super();
    this.isMeshNormalMaterial = true;
    this.bumpMap = null;
    this.bumpScale = 1;
    this.normalMap = null;
    this.normalMapType = TangentSpaceNormalMap;
    this.normalScale = new Vector2(1, 1);
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.flatShading = false;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.bumpMap = source.bumpMap;
    this.bumpScale = source.bumpScale;
    this.normalMap = source.normalMap;
    this.normalMapType = source.normalMapType;
    this.normalScale.copy(source.normalScale);
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.flatShading = source.flatShading;
    return this;
  }
}
class MeshLambertMaterial extends Material {
  static {
    __name(this, "MeshLambertMaterial");
  }
  static get type() {
    return "MeshLambertMaterial";
  }
  constructor(parameters) {
    super();
    this.isMeshLambertMaterial = true;
    this.color = new Color(16777215);
    this.map = null;
    this.lightMap = null;
    this.lightMapIntensity = 1;
    this.aoMap = null;
    this.aoMapIntensity = 1;
    this.emissive = new Color(0);
    this.emissiveIntensity = 1;
    this.emissiveMap = null;
    this.bumpMap = null;
    this.bumpScale = 1;
    this.normalMap = null;
    this.normalMapType = TangentSpaceNormalMap;
    this.normalScale = new Vector2(1, 1);
    this.displacementMap = null;
    this.displacementScale = 1;
    this.displacementBias = 0;
    this.specularMap = null;
    this.alphaMap = null;
    this.envMap = null;
    this.envMapRotation = new Euler();
    this.combine = MultiplyOperation;
    this.reflectivity = 1;
    this.refractionRatio = 0.98;
    this.wireframe = false;
    this.wireframeLinewidth = 1;
    this.wireframeLinecap = "round";
    this.wireframeLinejoin = "round";
    this.flatShading = false;
    this.fog = true;
    this.setValues(parameters);
  }
  copy(source) {
    super.copy(source);
    this.color.copy(source.color);
    this.map = source.map;
    this.lightMap = source.lightMap;
    this.lightMapIntensity = source.lightMapIntensity;
    this.aoMap = source.aoMap;
    this.aoMapIntensity = source.aoMapIntensity;
    this.emissive.copy(source.emissive);
    this.emissiveMap = source.emissiveMap;
    this.emissiveIntensity = source.emissiveIntensity;
    this.bumpMap = source.bumpMap;
    this.bumpScale = source.bumpScale;
    this.normalMap = source.normalMap;
    this.normalMapType = source.normalMapType;
    this.normalScale.copy(source.normalScale);
    this.displacementMap = source.displacementMap;
    this.displacementScale = source.displacementScale;
    this.displacementBias = source.displacementBias;
    this.specularMap = source.specularMap;
    this.alphaMap = source.alphaMap;
    this.envMap = source.envMap;
    this.envMapRotation.copy(source.envMapRotation);
    this.combine = source.combine;
    this.reflectivity = source.reflectivity;
    this.refractionRatio = source.refractionRatio;
    this.wireframe = source.wireframe;
    this.wireframeLinewidth = source.wireframeLinewidth;
    this.wireframeLinecap = source.wireframeLinecap;
    this.wireframeLinejoin = source.wireframeLinejoin;
    this.flatShading = source.flatShading;
    this.fog = source.fog;
    return this;
  }
}
function convertArray(array, type, forceClone) {
  if (!array || // let 'undefined' and 'null' pass
  !forceClone && array.constructor === type) return array;
  if (typeof type.BYTES_PER_ELEMENT === "number") {
    return new type(array);
  }
  return Array.prototype.slice.call(array);
}
__name(convertArray, "convertArray");
function isTypedArray(object) {
  return ArrayBuffer.isView(object) && !(object instanceof DataView);
}
__name(isTypedArray, "isTypedArray");
function getKeyframeOrder(times) {
  function compareTime(i, j) {
    return times[i] - times[j];
  }
  __name(compareTime, "compareTime");
  const n = times.length;
  const result = new Array(n);
  for (let i = 0; i !== n; ++i) result[i] = i;
  result.sort(compareTime);
  return result;
}
__name(getKeyframeOrder, "getKeyframeOrder");
function sortedArray(values, stride, order) {
  const nValues = values.length;
  const result = new values.constructor(nValues);
  for (let i = 0, dstOffset = 0; dstOffset !== nValues; ++i) {
    const srcOffset = order[i] * stride;
    for (let j = 0; j !== stride; ++j) {
      result[dstOffset++] = values[srcOffset + j];
    }
  }
  return result;
}
__name(sortedArray, "sortedArray");
function flattenJSON(jsonKeys, times, values, valuePropertyName) {
  let i = 1, key = jsonKeys[0];
  while (key !== void 0 && key[valuePropertyName] === void 0) {
    key = jsonKeys[i++];
  }
  if (key === void 0) return;
  let value = key[valuePropertyName];
  if (value === void 0) return;
  if (Array.isArray(value)) {
    do {
      value = key[valuePropertyName];
      if (value !== void 0) {
        times.push(key.time);
        values.push.apply(values, value);
      }
      key = jsonKeys[i++];
    } while (key !== void 0);
  } else if (value.toArray !== void 0) {
    do {
      value = key[valuePropertyName];
      if (value !== void 0) {
        times.push(key.time);
        value.toArray(values, values.length);
      }
      key = jsonKeys[i++];
    } while (key !== void 0);
  } else {
    do {
      value = key[valuePropertyName];
      if (value !== void 0) {
        times.push(key.time);
        values.push(value);
      }
      key = jsonKeys[i++];
    } while (key !== void 0);
  }
}
__name(flattenJSON, "flattenJSON");
class Interpolant {
  static {
    __name(this, "Interpolant");
  }
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    this.parameterPositions = parameterPositions;
    this._cachedIndex = 0;
    this.resultBuffer = resultBuffer !== void 0 ? resultBuffer : new sampleValues.constructor(sampleSize);
    this.sampleValues = sampleValues;
    this.valueSize = sampleSize;
    this.settings = null;
    this.DefaultSettings_ = {};
  }
  evaluate(t) {
    const pp = this.parameterPositions;
    let i1 = this._cachedIndex, t1 = pp[i1], t0 = pp[i1 - 1];
    validate_interval: {
      seek: {
        let right;
        linear_scan: {
          forward_scan: if (!(t < t1)) {
            for (let giveUpAt = i1 + 2; ; ) {
              if (t1 === void 0) {
                if (t < t0) break forward_scan;
                i1 = pp.length;
                this._cachedIndex = i1;
                return this.copySampleValue_(i1 - 1);
              }
              if (i1 === giveUpAt) break;
              t0 = t1;
              t1 = pp[++i1];
              if (t < t1) {
                break seek;
              }
            }
            right = pp.length;
            break linear_scan;
          }
          if (!(t >= t0)) {
            const t1global = pp[1];
            if (t < t1global) {
              i1 = 2;
              t0 = t1global;
            }
            for (let giveUpAt = i1 - 2; ; ) {
              if (t0 === void 0) {
                this._cachedIndex = 0;
                return this.copySampleValue_(0);
              }
              if (i1 === giveUpAt) break;
              t1 = t0;
              t0 = pp[--i1 - 1];
              if (t >= t0) {
                break seek;
              }
            }
            right = i1;
            i1 = 0;
            break linear_scan;
          }
          break validate_interval;
        }
        while (i1 < right) {
          const mid = i1 + right >>> 1;
          if (t < pp[mid]) {
            right = mid;
          } else {
            i1 = mid + 1;
          }
        }
        t1 = pp[i1];
        t0 = pp[i1 - 1];
        if (t0 === void 0) {
          this._cachedIndex = 0;
          return this.copySampleValue_(0);
        }
        if (t1 === void 0) {
          i1 = pp.length;
          this._cachedIndex = i1;
          return this.copySampleValue_(i1 - 1);
        }
      }
      this._cachedIndex = i1;
      this.intervalChanged_(i1, t0, t1);
    }
    return this.interpolate_(i1, t0, t, t1);
  }
  getSettings_() {
    return this.settings || this.DefaultSettings_;
  }
  copySampleValue_(index) {
    const result = this.resultBuffer, values = this.sampleValues, stride = this.valueSize, offset = index * stride;
    for (let i = 0; i !== stride; ++i) {
      result[i] = values[offset + i];
    }
    return result;
  }
  // Template methods for derived classes:
  interpolate_() {
    throw new Error("call to abstract method");
  }
  intervalChanged_() {
  }
}
class CubicInterpolant extends Interpolant {
  static {
    __name(this, "CubicInterpolant");
  }
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    super(parameterPositions, sampleValues, sampleSize, resultBuffer);
    this._weightPrev = -0;
    this._offsetPrev = -0;
    this._weightNext = -0;
    this._offsetNext = -0;
    this.DefaultSettings_ = {
      endingStart: ZeroCurvatureEnding,
      endingEnd: ZeroCurvatureEnding
    };
  }
  intervalChanged_(i1, t0, t1) {
    const pp = this.parameterPositions;
    let iPrev = i1 - 2, iNext = i1 + 1, tPrev = pp[iPrev], tNext = pp[iNext];
    if (tPrev === void 0) {
      switch (this.getSettings_().endingStart) {
        case ZeroSlopeEnding:
          iPrev = i1;
          tPrev = 2 * t0 - t1;
          break;
        case WrapAroundEnding:
          iPrev = pp.length - 2;
          tPrev = t0 + pp[iPrev] - pp[iPrev + 1];
          break;
        default:
          iPrev = i1;
          tPrev = t1;
      }
    }
    if (tNext === void 0) {
      switch (this.getSettings_().endingEnd) {
        case ZeroSlopeEnding:
          iNext = i1;
          tNext = 2 * t1 - t0;
          break;
        case WrapAroundEnding:
          iNext = 1;
          tNext = t1 + pp[1] - pp[0];
          break;
        default:
          iNext = i1 - 1;
          tNext = t0;
      }
    }
    const halfDt = (t1 - t0) * 0.5, stride = this.valueSize;
    this._weightPrev = halfDt / (t0 - tPrev);
    this._weightNext = halfDt / (tNext - t1);
    this._offsetPrev = iPrev * stride;
    this._offsetNext = iNext * stride;
  }
  interpolate_(i1, t0, t, t1) {
    const result = this.resultBuffer, values = this.sampleValues, stride = this.valueSize, o1 = i1 * stride, o0 = o1 - stride, oP = this._offsetPrev, oN = this._offsetNext, wP = this._weightPrev, wN = this._weightNext, p = (t - t0) / (t1 - t0), pp = p * p, ppp = pp * p;
    const sP = -wP * ppp + 2 * wP * pp - wP * p;
    const s0 = (1 + wP) * ppp + (-1.5 - 2 * wP) * pp + (-0.5 + wP) * p + 1;
    const s1 = (-1 - wN) * ppp + (1.5 + wN) * pp + 0.5 * p;
    const sN = wN * ppp - wN * pp;
    for (let i = 0; i !== stride; ++i) {
      result[i] = sP * values[oP + i] + s0 * values[o0 + i] + s1 * values[o1 + i] + sN * values[oN + i];
    }
    return result;
  }
}
class LinearInterpolant extends Interpolant {
  static {
    __name(this, "LinearInterpolant");
  }
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    super(parameterPositions, sampleValues, sampleSize, resultBuffer);
  }
  interpolate_(i1, t0, t, t1) {
    const result = this.resultBuffer, values = this.sampleValues, stride = this.valueSize, offset1 = i1 * stride, offset0 = offset1 - stride, weight1 = (t - t0) / (t1 - t0), weight0 = 1 - weight1;
    for (let i = 0; i !== stride; ++i) {
      result[i] = values[offset0 + i] * weight0 + values[offset1 + i] * weight1;
    }
    return result;
  }
}
class DiscreteInterpolant extends Interpolant {
  static {
    __name(this, "DiscreteInterpolant");
  }
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    super(parameterPositions, sampleValues, sampleSize, resultBuffer);
  }
  interpolate_(i1) {
    return this.copySampleValue_(i1 - 1);
  }
}
class KeyframeTrack {
  static {
    __name(this, "KeyframeTrack");
  }
  constructor(name, times, values, interpolation) {
    if (name === void 0) throw new Error("THREE.KeyframeTrack: track name is undefined");
    if (times === void 0 || times.length === 0) throw new Error("THREE.KeyframeTrack: no keyframes in track named " + name);
    this.name = name;
    this.times = convertArray(times, this.TimeBufferType);
    this.values = convertArray(values, this.ValueBufferType);
    this.setInterpolation(interpolation || this.DefaultInterpolation);
  }
  // Serialization (in static context, because of constructor invocation
  // and automatic invocation of .toJSON):
  static toJSON(track) {
    const trackType = track.constructor;
    let json;
    if (trackType.toJSON !== this.toJSON) {
      json = trackType.toJSON(track);
    } else {
      json = {
        "name": track.name,
        "times": convertArray(track.times, Array),
        "values": convertArray(track.values, Array)
      };
      const interpolation = track.getInterpolation();
      if (interpolation !== track.DefaultInterpolation) {
        json.interpolation = interpolation;
      }
    }
    json.type = track.ValueTypeName;
    return json;
  }
  InterpolantFactoryMethodDiscrete(result) {
    return new DiscreteInterpolant(this.times, this.values, this.getValueSize(), result);
  }
  InterpolantFactoryMethodLinear(result) {
    return new LinearInterpolant(this.times, this.values, this.getValueSize(), result);
  }
  InterpolantFactoryMethodSmooth(result) {
    return new CubicInterpolant(this.times, this.values, this.getValueSize(), result);
  }
  setInterpolation(interpolation) {
    let factoryMethod;
    switch (interpolation) {
      case InterpolateDiscrete:
        factoryMethod = this.InterpolantFactoryMethodDiscrete;
        break;
      case InterpolateLinear:
        factoryMethod = this.InterpolantFactoryMethodLinear;
        break;
      case InterpolateSmooth:
        factoryMethod = this.InterpolantFactoryMethodSmooth;
        break;
    }
    if (factoryMethod === void 0) {
      const message = "unsupported interpolation for " + this.ValueTypeName + " keyframe track named " + this.name;
      if (this.createInterpolant === void 0) {
        if (interpolation !== this.DefaultInterpolation) {
          this.setInterpolation(this.DefaultInterpolation);
        } else {
          throw new Error(message);
        }
      }
      console.warn("THREE.KeyframeTrack:", message);
      return this;
    }
    this.createInterpolant = factoryMethod;
    return this;
  }
  getInterpolation() {
    switch (this.createInterpolant) {
      case this.InterpolantFactoryMethodDiscrete:
        return InterpolateDiscrete;
      case this.InterpolantFactoryMethodLinear:
        return InterpolateLinear;
      case this.InterpolantFactoryMethodSmooth:
        return InterpolateSmooth;
    }
  }
  getValueSize() {
    return this.values.length / this.times.length;
  }
  // move all keyframes either forwards or backwards in time
  shift(timeOffset) {
    if (timeOffset !== 0) {
      const times = this.times;
      for (let i = 0, n = times.length; i !== n; ++i) {
        times[i] += timeOffset;
      }
    }
    return this;
  }
  // scale all keyframe times by a factor (useful for frame <-> seconds conversions)
  scale(timeScale) {
    if (timeScale !== 1) {
      const times = this.times;
      for (let i = 0, n = times.length; i !== n; ++i) {
        times[i] *= timeScale;
      }
    }
    return this;
  }
  // removes keyframes before and after animation without changing any values within the range [startTime, endTime].
  // IMPORTANT: We do not shift around keys to the start of the track time, because for interpolated keys this will change their values
  trim(startTime, endTime) {
    const times = this.times, nKeys = times.length;
    let from = 0, to = nKeys - 1;
    while (from !== nKeys && times[from] < startTime) {
      ++from;
    }
    while (to !== -1 && times[to] > endTime) {
      --to;
    }
    ++to;
    if (from !== 0 || to !== nKeys) {
      if (from >= to) {
        to = Math.max(to, 1);
        from = to - 1;
      }
      const stride = this.getValueSize();
      this.times = times.slice(from, to);
      this.values = this.values.slice(from * stride, to * stride);
    }
    return this;
  }
  // ensure we do not get a GarbageInGarbageOut situation, make sure tracks are at least minimally viable
  validate() {
    let valid = true;
    const valueSize = this.getValueSize();
    if (valueSize - Math.floor(valueSize) !== 0) {
      console.error("THREE.KeyframeTrack: Invalid value size in track.", this);
      valid = false;
    }
    const times = this.times, values = this.values, nKeys = times.length;
    if (nKeys === 0) {
      console.error("THREE.KeyframeTrack: Track is empty.", this);
      valid = false;
    }
    let prevTime = null;
    for (let i = 0; i !== nKeys; i++) {
      const currTime = times[i];
      if (typeof currTime === "number" && isNaN(currTime)) {
        console.error("THREE.KeyframeTrack: Time is not a valid number.", this, i, currTime);
        valid = false;
        break;
      }
      if (prevTime !== null && prevTime > currTime) {
        console.error("THREE.KeyframeTrack: Out of order keys.", this, i, currTime, prevTime);
        valid = false;
        break;
      }
      prevTime = currTime;
    }
    if (values !== void 0) {
      if (isTypedArray(values)) {
        for (let i = 0, n = values.length; i !== n; ++i) {
          const value = values[i];
          if (isNaN(value)) {
            console.error("THREE.KeyframeTrack: Value is not a valid number.", this, i, value);
            valid = false;
            break;
          }
        }
      }
    }
    return valid;
  }
  // removes equivalent sequential keys as common in morph target sequences
  // (0,0,0,0,1,1,1,0,0,0,0,0,0,0) --> (0,0,1,1,0,0)
  optimize() {
    const times = this.times.slice(), values = this.values.slice(), stride = this.getValueSize(), smoothInterpolation = this.getInterpolation() === InterpolateSmooth, lastIndex = times.length - 1;
    let writeIndex = 1;
    for (let i = 1; i < lastIndex; ++i) {
      let keep = false;
      const time = times[i];
      const timeNext = times[i + 1];
      if (time !== timeNext && (i !== 1 || time !== times[0])) {
        if (!smoothInterpolation) {
          const offset = i * stride, offsetP = offset - stride, offsetN = offset + stride;
          for (let j = 0; j !== stride; ++j) {
            const value = values[offset + j];
            if (value !== values[offsetP + j] || value !== values[offsetN + j]) {
              keep = true;
              break;
            }
          }
        } else {
          keep = true;
        }
      }
      if (keep) {
        if (i !== writeIndex) {
          times[writeIndex] = times[i];
          const readOffset = i * stride, writeOffset = writeIndex * stride;
          for (let j = 0; j !== stride; ++j) {
            values[writeOffset + j] = values[readOffset + j];
          }
        }
        ++writeIndex;
      }
    }
    if (lastIndex > 0) {
      times[writeIndex] = times[lastIndex];
      for (let readOffset = lastIndex * stride, writeOffset = writeIndex * stride, j = 0; j !== stride; ++j) {
        values[writeOffset + j] = values[readOffset + j];
      }
      ++writeIndex;
    }
    if (writeIndex !== times.length) {
      this.times = times.slice(0, writeIndex);
      this.values = values.slice(0, writeIndex * stride);
    } else {
      this.times = times;
      this.values = values;
    }
    return this;
  }
  clone() {
    const times = this.times.slice();
    const values = this.values.slice();
    const TypedKeyframeTrack = this.constructor;
    const track = new TypedKeyframeTrack(this.name, times, values);
    track.createInterpolant = this.createInterpolant;
    return track;
  }
}
KeyframeTrack.prototype.TimeBufferType = Float32Array;
KeyframeTrack.prototype.ValueBufferType = Float32Array;
KeyframeTrack.prototype.DefaultInterpolation = InterpolateLinear;
class BooleanKeyframeTrack extends KeyframeTrack {
  static {
    __name(this, "BooleanKeyframeTrack");
  }
  // No interpolation parameter because only InterpolateDiscrete is valid.
  constructor(name, times, values) {
    super(name, times, values);
  }
}
BooleanKeyframeTrack.prototype.ValueTypeName = "bool";
BooleanKeyframeTrack.prototype.ValueBufferType = Array;
BooleanKeyframeTrack.prototype.DefaultInterpolation = InterpolateDiscrete;
BooleanKeyframeTrack.prototype.InterpolantFactoryMethodLinear = void 0;
BooleanKeyframeTrack.prototype.InterpolantFactoryMethodSmooth = void 0;
class ColorKeyframeTrack extends KeyframeTrack {
  static {
    __name(this, "ColorKeyframeTrack");
  }
}
ColorKeyframeTrack.prototype.ValueTypeName = "color";
class NumberKeyframeTrack extends KeyframeTrack {
  static {
    __name(this, "NumberKeyframeTrack");
  }
}
NumberKeyframeTrack.prototype.ValueTypeName = "number";
class QuaternionLinearInterpolant extends Interpolant {
  static {
    __name(this, "QuaternionLinearInterpolant");
  }
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    super(parameterPositions, sampleValues, sampleSize, resultBuffer);
  }
  interpolate_(i1, t0, t, t1) {
    const result = this.resultBuffer, values = this.sampleValues, stride = this.valueSize, alpha = (t - t0) / (t1 - t0);
    let offset = i1 * stride;
    for (let end = offset + stride; offset !== end; offset += 4) {
      Quaternion.slerpFlat(result, 0, values, offset - stride, values, offset, alpha);
    }
    return result;
  }
}
class QuaternionKeyframeTrack extends KeyframeTrack {
  static {
    __name(this, "QuaternionKeyframeTrack");
  }
  InterpolantFactoryMethodLinear(result) {
    return new QuaternionLinearInterpolant(this.times, this.values, this.getValueSize(), result);
  }
}
QuaternionKeyframeTrack.prototype.ValueTypeName = "quaternion";
QuaternionKeyframeTrack.prototype.InterpolantFactoryMethodSmooth = void 0;
class StringKeyframeTrack extends KeyframeTrack {
  static {
    __name(this, "StringKeyframeTrack");
  }
  // No interpolation parameter because only InterpolateDiscrete is valid.
  constructor(name, times, values) {
    super(name, times, values);
  }
}
StringKeyframeTrack.prototype.ValueTypeName = "string";
StringKeyframeTrack.prototype.ValueBufferType = Array;
StringKeyframeTrack.prototype.DefaultInterpolation = InterpolateDiscrete;
StringKeyframeTrack.prototype.InterpolantFactoryMethodLinear = void 0;
StringKeyframeTrack.prototype.InterpolantFactoryMethodSmooth = void 0;
class VectorKeyframeTrack extends KeyframeTrack {
  static {
    __name(this, "VectorKeyframeTrack");
  }
}
VectorKeyframeTrack.prototype.ValueTypeName = "vector";
class AnimationClip {
  static {
    __name(this, "AnimationClip");
  }
  constructor(name = "", duration = -1, tracks = [], blendMode = NormalAnimationBlendMode) {
    this.name = name;
    this.tracks = tracks;
    this.duration = duration;
    this.blendMode = blendMode;
    this.uuid = generateUUID();
    if (this.duration < 0) {
      this.resetDuration();
    }
  }
  static parse(json) {
    const tracks = [], jsonTracks = json.tracks, frameTime = 1 / (json.fps || 1);
    for (let i = 0, n = jsonTracks.length; i !== n; ++i) {
      tracks.push(parseKeyframeTrack(jsonTracks[i]).scale(frameTime));
    }
    const clip = new this(json.name, json.duration, tracks, json.blendMode);
    clip.uuid = json.uuid;
    return clip;
  }
  static toJSON(clip) {
    const tracks = [], clipTracks = clip.tracks;
    const json = {
      "name": clip.name,
      "duration": clip.duration,
      "tracks": tracks,
      "uuid": clip.uuid,
      "blendMode": clip.blendMode
    };
    for (let i = 0, n = clipTracks.length; i !== n; ++i) {
      tracks.push(KeyframeTrack.toJSON(clipTracks[i]));
    }
    return json;
  }
  static CreateFromMorphTargetSequence(name, morphTargetSequence, fps, noLoop) {
    const numMorphTargets = morphTargetSequence.length;
    const tracks = [];
    for (let i = 0; i < numMorphTargets; i++) {
      let times = [];
      let values = [];
      times.push(
        (i + numMorphTargets - 1) % numMorphTargets,
        i,
        (i + 1) % numMorphTargets
      );
      values.push(0, 1, 0);
      const order = getKeyframeOrder(times);
      times = sortedArray(times, 1, order);
      values = sortedArray(values, 1, order);
      if (!noLoop && times[0] === 0) {
        times.push(numMorphTargets);
        values.push(values[0]);
      }
      tracks.push(
        new NumberKeyframeTrack(
          ".morphTargetInfluences[" + morphTargetSequence[i].name + "]",
          times,
          values
        ).scale(1 / fps)
      );
    }
    return new this(name, -1, tracks);
  }
  static findByName(objectOrClipArray, name) {
    let clipArray = objectOrClipArray;
    if (!Array.isArray(objectOrClipArray)) {
      const o = objectOrClipArray;
      clipArray = o.geometry && o.geometry.animations || o.animations;
    }
    for (let i = 0; i < clipArray.length; i++) {
      if (clipArray[i].name === name) {
        return clipArray[i];
      }
    }
    return null;
  }
  static CreateClipsFromMorphTargetSequences(morphTargets, fps, noLoop) {
    const animationToMorphTargets = {};
    const pattern = /^([\w-]*?)([\d]+)$/;
    for (let i = 0, il = morphTargets.length; i < il; i++) {
      const morphTarget = morphTargets[i];
      const parts = morphTarget.name.match(pattern);
      if (parts && parts.length > 1) {
        const name = parts[1];
        let animationMorphTargets = animationToMorphTargets[name];
        if (!animationMorphTargets) {
          animationToMorphTargets[name] = animationMorphTargets = [];
        }
        animationMorphTargets.push(morphTarget);
      }
    }
    const clips = [];
    for (const name in animationToMorphTargets) {
      clips.push(this.CreateFromMorphTargetSequence(name, animationToMorphTargets[name], fps, noLoop));
    }
    return clips;
  }
  // parse the animation.hierarchy format
  static parseAnimation(animation, bones) {
    if (!animation) {
      console.error("THREE.AnimationClip: No animation in JSONLoader data.");
      return null;
    }
    const addNonemptyTrack = /* @__PURE__ */ __name(function(trackType, trackName, animationKeys, propertyName, destTracks) {
      if (animationKeys.length !== 0) {
        const times = [];
        const values = [];
        flattenJSON(animationKeys, times, values, propertyName);
        if (times.length !== 0) {
          destTracks.push(new trackType(trackName, times, values));
        }
      }
    }, "addNonemptyTrack");
    const tracks = [];
    const clipName = animation.name || "default";
    const fps = animation.fps || 30;
    const blendMode = animation.blendMode;
    let duration = animation.length || -1;
    const hierarchyTracks = animation.hierarchy || [];
    for (let h = 0; h < hierarchyTracks.length; h++) {
      const animationKeys = hierarchyTracks[h].keys;
      if (!animationKeys || animationKeys.length === 0) continue;
      if (animationKeys[0].morphTargets) {
        const morphTargetNames = {};
        let k;
        for (k = 0; k < animationKeys.length; k++) {
          if (animationKeys[k].morphTargets) {
            for (let m = 0; m < animationKeys[k].morphTargets.length; m++) {
              morphTargetNames[animationKeys[k].morphTargets[m]] = -1;
            }
          }
        }
        for (const morphTargetName in morphTargetNames) {
          const times = [];
          const values = [];
          for (let m = 0; m !== animationKeys[k].morphTargets.length; ++m) {
            const animationKey = animationKeys[k];
            times.push(animationKey.time);
            values.push(animationKey.morphTarget === morphTargetName ? 1 : 0);
          }
          tracks.push(new NumberKeyframeTrack(".morphTargetInfluence[" + morphTargetName + "]", times, values));
        }
        duration = morphTargetNames.length * fps;
      } else {
        const boneName = ".bones[" + bones[h].name + "]";
        addNonemptyTrack(
          VectorKeyframeTrack,
          boneName + ".position",
          animationKeys,
          "pos",
          tracks
        );
        addNonemptyTrack(
          QuaternionKeyframeTrack,
          boneName + ".quaternion",
          animationKeys,
          "rot",
          tracks
        );
        addNonemptyTrack(
          VectorKeyframeTrack,
          boneName + ".scale",
          animationKeys,
          "scl",
          tracks
        );
      }
    }
    if (tracks.length === 0) {
      return null;
    }
    const clip = new this(clipName, duration, tracks, blendMode);
    return clip;
  }
  resetDuration() {
    const tracks = this.tracks;
    let duration = 0;
    for (let i = 0, n = tracks.length; i !== n; ++i) {
      const track = this.tracks[i];
      duration = Math.max(duration, track.times[track.times.length - 1]);
    }
    this.duration = duration;
    return this;
  }
  trim() {
    for (let i = 0; i < this.tracks.length; i++) {
      this.tracks[i].trim(0, this.duration);
    }
    return this;
  }
  validate() {
    let valid = true;
    for (let i = 0; i < this.tracks.length; i++) {
      valid = valid && this.tracks[i].validate();
    }
    return valid;
  }
  optimize() {
    for (let i = 0; i < this.tracks.length; i++) {
      this.tracks[i].optimize();
    }
    return this;
  }
  clone() {
    const tracks = [];
    for (let i = 0; i < this.tracks.length; i++) {
      tracks.push(this.tracks[i].clone());
    }
    return new this.constructor(this.name, this.duration, tracks, this.blendMode);
  }
  toJSON() {
    return this.constructor.toJSON(this);
  }
}
function getTrackTypeForValueTypeName(typeName) {
  switch (typeName.toLowerCase()) {
    case "scalar":
    case "double":
    case "float":
    case "number":
    case "integer":
      return NumberKeyframeTrack;
    case "vector":
    case "vector2":
    case "vector3":
    case "vector4":
      return VectorKeyframeTrack;
    case "color":
      return ColorKeyframeTrack;
    case "quaternion":
      return QuaternionKeyframeTrack;
    case "bool":
    case "boolean":
      return BooleanKeyframeTrack;
    case "string":
      return StringKeyframeTrack;
  }
  throw new Error("THREE.KeyframeTrack: Unsupported typeName: " + typeName);
}
__name(getTrackTypeForValueTypeName, "getTrackTypeForValueTypeName");
function parseKeyframeTrack(json) {
  if (json.type === void 0) {
    throw new Error("THREE.KeyframeTrack: track type undefined, can not parse");
  }
  const trackType = getTrackTypeForValueTypeName(json.type);
  if (json.times === void 0) {
    const times = [], values = [];
    flattenJSON(json.keys, times, values, "value");
    json.times = times;
    json.values = values;
  }
  if (trackType.parse !== void 0) {
    return trackType.parse(json);
  } else {
    return new trackType(json.name, json.times, json.values, json.interpolation);
  }
}
__name(parseKeyframeTrack, "parseKeyframeTrack");
const Cache = {
  enabled: false,
  files: {},
  add: /* @__PURE__ */ __name(function(key, file) {
    if (this.enabled === false) return;
    this.files[key] = file;
  }, "add"),
  get: /* @__PURE__ */ __name(function(key) {
    if (this.enabled === false) return;
    return this.files[key];
  }, "get"),
  remove: /* @__PURE__ */ __name(function(key) {
    delete this.files[key];
  }, "remove"),
  clear: /* @__PURE__ */ __name(function() {
    this.files = {};
  }, "clear")
};
class LoadingManager {
  static {
    __name(this, "LoadingManager");
  }
  constructor(onLoad, onProgress, onError) {
    const scope = this;
    let isLoading = false;
    let itemsLoaded = 0;
    let itemsTotal = 0;
    let urlModifier = void 0;
    const handlers = [];
    this.onStart = void 0;
    this.onLoad = onLoad;
    this.onProgress = onProgress;
    this.onError = onError;
    this.itemStart = function(url) {
      itemsTotal++;
      if (isLoading === false) {
        if (scope.onStart !== void 0) {
          scope.onStart(url, itemsLoaded, itemsTotal);
        }
      }
      isLoading = true;
    };
    this.itemEnd = function(url) {
      itemsLoaded++;
      if (scope.onProgress !== void 0) {
        scope.onProgress(url, itemsLoaded, itemsTotal);
      }
      if (itemsLoaded === itemsTotal) {
        isLoading = false;
        if (scope.onLoad !== void 0) {
          scope.onLoad();
        }
      }
    };
    this.itemError = function(url) {
      if (scope.onError !== void 0) {
        scope.onError(url);
      }
    };
    this.resolveURL = function(url) {
      if (urlModifier) {
        return urlModifier(url);
      }
      return url;
    };
    this.setURLModifier = function(transform) {
      urlModifier = transform;
      return this;
    };
    this.addHandler = function(regex, loader) {
      handlers.push(regex, loader);
      return this;
    };
    this.removeHandler = function(regex) {
      const index = handlers.indexOf(regex);
      if (index !== -1) {
        handlers.splice(index, 2);
      }
      return this;
    };
    this.getHandler = function(file) {
      for (let i = 0, l = handlers.length; i < l; i += 2) {
        const regex = handlers[i];
        const loader = handlers[i + 1];
        if (regex.global) regex.lastIndex = 0;
        if (regex.test(file)) {
          return loader;
        }
      }
      return null;
    };
  }
}
const DefaultLoadingManager = /* @__PURE__ */ new LoadingManager();
class Loader {
  static {
    __name(this, "Loader");
  }
  constructor(manager) {
    this.manager = manager !== void 0 ? manager : DefaultLoadingManager;
    this.crossOrigin = "anonymous";
    this.withCredentials = false;
    this.path = "";
    this.resourcePath = "";
    this.requestHeader = {};
  }
  load() {
  }
  loadAsync(url, onProgress) {
    const scope = this;
    return new Promise(function(resolve, reject) {
      scope.load(url, resolve, onProgress, reject);
    });
  }
  parse() {
  }
  setCrossOrigin(crossOrigin) {
    this.crossOrigin = crossOrigin;
    return this;
  }
  setWithCredentials(value) {
    this.withCredentials = value;
    return this;
  }
  setPath(path) {
    this.path = path;
    return this;
  }
  setResourcePath(resourcePath) {
    this.resourcePath = resourcePath;
    return this;
  }
  setRequestHeader(requestHeader) {
    this.requestHeader = requestHeader;
    return this;
  }
}
Loader.DEFAULT_MATERIAL_NAME = "__DEFAULT";
const loading = {};
class HttpError extends Error {
  static {
    __name(this, "HttpError");
  }
  constructor(message, response) {
    super(message);
    this.response = response;
  }
}
class FileLoader extends Loader {
  static {
    __name(this, "FileLoader");
  }
  constructor(manager) {
    super(manager);
  }
  load(url, onLoad, onProgress, onError) {
    if (url === void 0) url = "";
    if (this.path !== void 0) url = this.path + url;
    url = this.manager.resolveURL(url);
    const cached = Cache.get(url);
    if (cached !== void 0) {
      this.manager.itemStart(url);
      setTimeout(() => {
        if (onLoad) onLoad(cached);
        this.manager.itemEnd(url);
      }, 0);
      return cached;
    }
    if (loading[url] !== void 0) {
      loading[url].push({
        onLoad,
        onProgress,
        onError
      });
      return;
    }
    loading[url] = [];
    loading[url].push({
      onLoad,
      onProgress,
      onError
    });
    const req = new Request(url, {
      headers: new Headers(this.requestHeader),
      credentials: this.withCredentials ? "include" : "same-origin"
      // An abort controller could be added within a future PR
    });
    const mimeType = this.mimeType;
    const responseType = this.responseType;
    fetch(req).then((response) => {
      if (response.status === 200 || response.status === 0) {
        if (response.status === 0) {
          console.warn("THREE.FileLoader: HTTP Status 0 received.");
        }
        if (typeof ReadableStream === "undefined" || response.body === void 0 || response.body.getReader === void 0) {
          return response;
        }
        const callbacks = loading[url];
        const reader = response.body.getReader();
        const contentLength = response.headers.get("X-File-Size") || response.headers.get("Content-Length");
        const total = contentLength ? parseInt(contentLength) : 0;
        const lengthComputable = total !== 0;
        let loaded = 0;
        const stream = new ReadableStream({
          start(controller) {
            readData();
            function readData() {
              reader.read().then(({ done, value }) => {
                if (done) {
                  controller.close();
                } else {
                  loaded += value.byteLength;
                  const event = new ProgressEvent("progress", { lengthComputable, loaded, total });
                  for (let i = 0, il = callbacks.length; i < il; i++) {
                    const callback = callbacks[i];
                    if (callback.onProgress) callback.onProgress(event);
                  }
                  controller.enqueue(value);
                  readData();
                }
              }, (e) => {
                controller.error(e);
              });
            }
            __name(readData, "readData");
          }
        });
        return new Response(stream);
      } else {
        throw new HttpError(`fetch for "${response.url}" responded with ${response.status}: ${response.statusText}`, response);
      }
    }).then((response) => {
      switch (responseType) {
        case "arraybuffer":
          return response.arrayBuffer();
        case "blob":
          return response.blob();
        case "document":
          return response.text().then((text) => {
            const parser = new DOMParser();
            return parser.parseFromString(text, mimeType);
          });
        case "json":
          return response.json();
        default:
          if (mimeType === void 0) {
            return response.text();
          } else {
            const re = /charset="?([^;"\s]*)"?/i;
            const exec = re.exec(mimeType);
            const label = exec && exec[1] ? exec[1].toLowerCase() : void 0;
            const decoder = new TextDecoder(label);
            return response.arrayBuffer().then((ab) => decoder.decode(ab));
          }
      }
    }).then((data) => {
      Cache.add(url, data);
      const callbacks = loading[url];
      delete loading[url];
      for (let i = 0, il = callbacks.length; i < il; i++) {
        const callback = callbacks[i];
        if (callback.onLoad) callback.onLoad(data);
      }
    }).catch((err2) => {
      const callbacks = loading[url];
      if (callbacks === void 0) {
        this.manager.itemError(url);
        throw err2;
      }
      delete loading[url];
      for (let i = 0, il = callbacks.length; i < il; i++) {
        const callback = callbacks[i];
        if (callback.onError) callback.onError(err2);
      }
      this.manager.itemError(url);
    }).finally(() => {
      this.manager.itemEnd(url);
    });
    this.manager.itemStart(url);
  }
  setResponseType(value) {
    this.responseType = value;
    return this;
  }
  setMimeType(value) {
    this.mimeType = value;
    return this;
  }
}
class ImageLoader extends Loader {
  static {
    __name(this, "ImageLoader");
  }
  constructor(manager) {
    super(manager);
  }
  load(url, onLoad, onProgress, onError) {
    if (this.path !== void 0) url = this.path + url;
    url = this.manager.resolveURL(url);
    const scope = this;
    const cached = Cache.get(url);
    if (cached !== void 0) {
      scope.manager.itemStart(url);
      setTimeout(function() {
        if (onLoad) onLoad(cached);
        scope.manager.itemEnd(url);
      }, 0);
      return cached;
    }
    const image = createElementNS("img");
    function onImageLoad() {
      removeEventListeners();
      Cache.add(url, this);
      if (onLoad) onLoad(this);
      scope.manager.itemEnd(url);
    }
    __name(onImageLoad, "onImageLoad");
    function onImageError(event) {
      removeEventListeners();
      if (onError) onError(event);
      scope.manager.itemError(url);
      scope.manager.itemEnd(url);
    }
    __name(onImageError, "onImageError");
    function removeEventListeners() {
      image.removeEventListener("load", onImageLoad, false);
      image.removeEventListener("error", onImageError, false);
    }
    __name(removeEventListeners, "removeEventListeners");
    image.addEventListener("load", onImageLoad, false);
    image.addEventListener("error", onImageError, false);
    if (url.slice(0, 5) !== "data:") {
      if (this.crossOrigin !== void 0) image.crossOrigin = this.crossOrigin;
    }
    scope.manager.itemStart(url);
    image.src = url;
    return image;
  }
}
class TextureLoader extends Loader {
  static {
    __name(this, "TextureLoader");
  }
  constructor(manager) {
    super(manager);
  }
  load(url, onLoad, onProgress, onError) {
    const texture = new Texture();
    const loader = new ImageLoader(this.manager);
    loader.setCrossOrigin(this.crossOrigin);
    loader.setPath(this.path);
    loader.load(url, function(image) {
      texture.image = image;
      texture.needsUpdate = true;
      if (onLoad !== void 0) {
        onLoad(texture);
      }
    }, onProgress, onError);
    return texture;
  }
}
class Light extends Object3D {
  static {
    __name(this, "Light");
  }
  constructor(color, intensity = 1) {
    super();
    this.isLight = true;
    this.type = "Light";
    this.color = new Color(color);
    this.intensity = intensity;
  }
  dispose() {
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.color.copy(source.color);
    this.intensity = source.intensity;
    return this;
  }
  toJSON(meta) {
    const data = super.toJSON(meta);
    data.object.color = this.color.getHex();
    data.object.intensity = this.intensity;
    if (this.groundColor !== void 0) data.object.groundColor = this.groundColor.getHex();
    if (this.distance !== void 0) data.object.distance = this.distance;
    if (this.angle !== void 0) data.object.angle = this.angle;
    if (this.decay !== void 0) data.object.decay = this.decay;
    if (this.penumbra !== void 0) data.object.penumbra = this.penumbra;
    if (this.shadow !== void 0) data.object.shadow = this.shadow.toJSON();
    if (this.target !== void 0) data.object.target = this.target.uuid;
    return data;
  }
}
const _projScreenMatrix$1 = /* @__PURE__ */ new Matrix4();
const _lightPositionWorld$1 = /* @__PURE__ */ new Vector3();
const _lookTarget$1 = /* @__PURE__ */ new Vector3();
class LightShadow {
  static {
    __name(this, "LightShadow");
  }
  constructor(camera) {
    this.camera = camera;
    this.intensity = 1;
    this.bias = 0;
    this.normalBias = 0;
    this.radius = 1;
    this.blurSamples = 8;
    this.mapSize = new Vector2(512, 512);
    this.map = null;
    this.mapPass = null;
    this.matrix = new Matrix4();
    this.autoUpdate = true;
    this.needsUpdate = false;
    this._frustum = new Frustum();
    this._frameExtents = new Vector2(1, 1);
    this._viewportCount = 1;
    this._viewports = [
      new Vector4(0, 0, 1, 1)
    ];
  }
  getViewportCount() {
    return this._viewportCount;
  }
  getFrustum() {
    return this._frustum;
  }
  updateMatrices(light) {
    const shadowCamera = this.camera;
    const shadowMatrix = this.matrix;
    _lightPositionWorld$1.setFromMatrixPosition(light.matrixWorld);
    shadowCamera.position.copy(_lightPositionWorld$1);
    _lookTarget$1.setFromMatrixPosition(light.target.matrixWorld);
    shadowCamera.lookAt(_lookTarget$1);
    shadowCamera.updateMatrixWorld();
    _projScreenMatrix$1.multiplyMatrices(shadowCamera.projectionMatrix, shadowCamera.matrixWorldInverse);
    this._frustum.setFromProjectionMatrix(_projScreenMatrix$1);
    shadowMatrix.set(
      0.5,
      0,
      0,
      0.5,
      0,
      0.5,
      0,
      0.5,
      0,
      0,
      0.5,
      0.5,
      0,
      0,
      0,
      1
    );
    shadowMatrix.multiply(_projScreenMatrix$1);
  }
  getViewport(viewportIndex) {
    return this._viewports[viewportIndex];
  }
  getFrameExtents() {
    return this._frameExtents;
  }
  dispose() {
    if (this.map) {
      this.map.dispose();
    }
    if (this.mapPass) {
      this.mapPass.dispose();
    }
  }
  copy(source) {
    this.camera = source.camera.clone();
    this.intensity = source.intensity;
    this.bias = source.bias;
    this.radius = source.radius;
    this.mapSize.copy(source.mapSize);
    return this;
  }
  clone() {
    return new this.constructor().copy(this);
  }
  toJSON() {
    const object = {};
    if (this.intensity !== 1) object.intensity = this.intensity;
    if (this.bias !== 0) object.bias = this.bias;
    if (this.normalBias !== 0) object.normalBias = this.normalBias;
    if (this.radius !== 1) object.radius = this.radius;
    if (this.mapSize.x !== 512 || this.mapSize.y !== 512) object.mapSize = this.mapSize.toArray();
    object.camera = this.camera.toJSON(false).object;
    delete object.camera.matrix;
    return object;
  }
}
class SpotLightShadow extends LightShadow {
  static {
    __name(this, "SpotLightShadow");
  }
  constructor() {
    super(new PerspectiveCamera(50, 1, 0.5, 500));
    this.isSpotLightShadow = true;
    this.focus = 1;
  }
  updateMatrices(light) {
    const camera = this.camera;
    const fov2 = RAD2DEG * 2 * light.angle * this.focus;
    const aspect2 = this.mapSize.width / this.mapSize.height;
    const far = light.distance || camera.far;
    if (fov2 !== camera.fov || aspect2 !== camera.aspect || far !== camera.far) {
      camera.fov = fov2;
      camera.aspect = aspect2;
      camera.far = far;
      camera.updateProjectionMatrix();
    }
    super.updateMatrices(light);
  }
  copy(source) {
    super.copy(source);
    this.focus = source.focus;
    return this;
  }
}
class SpotLight extends Light {
  static {
    __name(this, "SpotLight");
  }
  constructor(color, intensity, distance = 0, angle = Math.PI / 3, penumbra = 0, decay = 2) {
    super(color, intensity);
    this.isSpotLight = true;
    this.type = "SpotLight";
    this.position.copy(Object3D.DEFAULT_UP);
    this.updateMatrix();
    this.target = new Object3D();
    this.distance = distance;
    this.angle = angle;
    this.penumbra = penumbra;
    this.decay = decay;
    this.map = null;
    this.shadow = new SpotLightShadow();
  }
  get power() {
    return this.intensity * Math.PI;
  }
  set power(power) {
    this.intensity = power / Math.PI;
  }
  dispose() {
    this.shadow.dispose();
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.distance = source.distance;
    this.angle = source.angle;
    this.penumbra = source.penumbra;
    this.decay = source.decay;
    this.target = source.target.clone();
    this.shadow = source.shadow.clone();
    return this;
  }
}
const _projScreenMatrix = /* @__PURE__ */ new Matrix4();
const _lightPositionWorld = /* @__PURE__ */ new Vector3();
const _lookTarget = /* @__PURE__ */ new Vector3();
class PointLightShadow extends LightShadow {
  static {
    __name(this, "PointLightShadow");
  }
  constructor() {
    super(new PerspectiveCamera(90, 1, 0.5, 500));
    this.isPointLightShadow = true;
    this._frameExtents = new Vector2(4, 2);
    this._viewportCount = 6;
    this._viewports = [
      // These viewports map a cube-map onto a 2D texture with the
      // following orientation:
      //
      //  xzXZ
      //   y Y
      //
      // X - Positive x direction
      // x - Negative x direction
      // Y - Positive y direction
      // y - Negative y direction
      // Z - Positive z direction
      // z - Negative z direction
      // positive X
      new Vector4(2, 1, 1, 1),
      // negative X
      new Vector4(0, 1, 1, 1),
      // positive Z
      new Vector4(3, 1, 1, 1),
      // negative Z
      new Vector4(1, 1, 1, 1),
      // positive Y
      new Vector4(3, 0, 1, 1),
      // negative Y
      new Vector4(1, 0, 1, 1)
    ];
    this._cubeDirections = [
      new Vector3(1, 0, 0),
      new Vector3(-1, 0, 0),
      new Vector3(0, 0, 1),
      new Vector3(0, 0, -1),
      new Vector3(0, 1, 0),
      new Vector3(0, -1, 0)
    ];
    this._cubeUps = [
      new Vector3(0, 1, 0),
      new Vector3(0, 1, 0),
      new Vector3(0, 1, 0),
      new Vector3(0, 1, 0),
      new Vector3(0, 0, 1),
      new Vector3(0, 0, -1)
    ];
  }
  updateMatrices(light, viewportIndex = 0) {
    const camera = this.camera;
    const shadowMatrix = this.matrix;
    const far = light.distance || camera.far;
    if (far !== camera.far) {
      camera.far = far;
      camera.updateProjectionMatrix();
    }
    _lightPositionWorld.setFromMatrixPosition(light.matrixWorld);
    camera.position.copy(_lightPositionWorld);
    _lookTarget.copy(camera.position);
    _lookTarget.add(this._cubeDirections[viewportIndex]);
    camera.up.copy(this._cubeUps[viewportIndex]);
    camera.lookAt(_lookTarget);
    camera.updateMatrixWorld();
    shadowMatrix.makeTranslation(-_lightPositionWorld.x, -_lightPositionWorld.y, -_lightPositionWorld.z);
    _projScreenMatrix.multiplyMatrices(camera.projectionMatrix, camera.matrixWorldInverse);
    this._frustum.setFromProjectionMatrix(_projScreenMatrix);
  }
}
class PointLight extends Light {
  static {
    __name(this, "PointLight");
  }
  constructor(color, intensity, distance = 0, decay = 2) {
    super(color, intensity);
    this.isPointLight = true;
    this.type = "PointLight";
    this.distance = distance;
    this.decay = decay;
    this.shadow = new PointLightShadow();
  }
  get power() {
    return this.intensity * 4 * Math.PI;
  }
  set power(power) {
    this.intensity = power / (4 * Math.PI);
  }
  dispose() {
    this.shadow.dispose();
  }
  copy(source, recursive) {
    super.copy(source, recursive);
    this.distance = source.distance;
    this.decay = source.decay;
    this.shadow = source.shadow.clone();
    return this;
  }
}
class DirectionalLightShadow extends LightShadow {
  static {
    __name(this, "DirectionalLightShadow");
  }
  constructor() {
    super(new OrthographicCamera(-5, 5, 5, -5, 0.5, 500));
    this.isDirectionalLightShadow = true;
  }
}
class DirectionalLight extends Light {
  static {
    __name(this, "DirectionalLight");
  }
  constructor(color, intensity) {
    super(color, intensity);
    this.isDirectionalLight = true;
    this.type = "DirectionalLight";
    this.position.copy(Object3D.DEFAULT_UP);
    this.updateMatrix();
    this.target = new Object3D();
    this.shadow = new DirectionalLightShadow();
  }
  dispose() {
    this.shadow.dispose();
  }
  copy(source) {
    super.copy(source);
    this.target = source.target.clone();
    this.shadow = source.shadow.clone();
    return this;
  }
}
class AmbientLight extends Light {
  static {
    __name(this, "AmbientLight");
  }
  constructor(color, intensity) {
    super(color, intensity);
    this.isAmbientLight = true;
    this.type = "AmbientLight";
  }
}
class LoaderUtils {
  static {
    __name(this, "LoaderUtils");
  }
  static decodeText(array) {
    console.warn("THREE.LoaderUtils: decodeText() has been deprecated with r165 and will be removed with r175. Use TextDecoder instead.");
    if (typeof TextDecoder !== "undefined") {
      return new TextDecoder().decode(array);
    }
    let s = "";
    for (let i = 0, il = array.length; i < il; i++) {
      s += String.fromCharCode(array[i]);
    }
    try {
      return decodeURIComponent(escape(s));
    } catch (e) {
      return s;
    }
  }
  static extractUrlBase(url) {
    const index = url.lastIndexOf("/");
    if (index === -1) return "./";
    return url.slice(0, index + 1);
  }
  static resolveURL(url, path) {
    if (typeof url !== "string" || url === "") return "";
    if (/^https?:\/\//i.test(path) && /^\//.test(url)) {
      path = path.replace(/(^https?:\/\/[^\/]+).*/i, "$1");
    }
    if (/^(https?:)?\/\//i.test(url)) return url;
    if (/^data:.*,.*$/i.test(url)) return url;
    if (/^blob:.*$/i.test(url)) return url;
    return path + url;
  }
}
class InstancedBufferGeometry extends BufferGeometry {
  static {
    __name(this, "InstancedBufferGeometry");
  }
  constructor() {
    super();
    this.isInstancedBufferGeometry = true;
    this.type = "InstancedBufferGeometry";
    this.instanceCount = Infinity;
  }
  copy(source) {
    super.copy(source);
    this.instanceCount = source.instanceCount;
    return this;
  }
  toJSON() {
    const data = super.toJSON();
    data.instanceCount = this.instanceCount;
    data.isInstancedBufferGeometry = true;
    return data;
  }
}
class ImageBitmapLoader extends Loader {
  static {
    __name(this, "ImageBitmapLoader");
  }
  constructor(manager) {
    super(manager);
    this.isImageBitmapLoader = true;
    if (typeof createImageBitmap === "undefined") {
      console.warn("THREE.ImageBitmapLoader: createImageBitmap() not supported.");
    }
    if (typeof fetch === "undefined") {
      console.warn("THREE.ImageBitmapLoader: fetch() not supported.");
    }
    this.options = { premultiplyAlpha: "none" };
  }
  setOptions(options) {
    this.options = options;
    return this;
  }
  load(url, onLoad, onProgress, onError) {
    if (url === void 0) url = "";
    if (this.path !== void 0) url = this.path + url;
    url = this.manager.resolveURL(url);
    const scope = this;
    const cached = Cache.get(url);
    if (cached !== void 0) {
      scope.manager.itemStart(url);
      if (cached.then) {
        cached.then((imageBitmap) => {
          if (onLoad) onLoad(imageBitmap);
          scope.manager.itemEnd(url);
        }).catch((e) => {
          if (onError) onError(e);
        });
        return;
      }
      setTimeout(function() {
        if (onLoad) onLoad(cached);
        scope.manager.itemEnd(url);
      }, 0);
      return cached;
    }
    const fetchOptions = {};
    fetchOptions.credentials = this.crossOrigin === "anonymous" ? "same-origin" : "include";
    fetchOptions.headers = this.requestHeader;
    const promise = fetch(url, fetchOptions).then(function(res) {
      return res.blob();
    }).then(function(blob2) {
      return createImageBitmap(blob2, Object.assign(scope.options, { colorSpaceConversion: "none" }));
    }).then(function(imageBitmap) {
      Cache.add(url, imageBitmap);
      if (onLoad) onLoad(imageBitmap);
      scope.manager.itemEnd(url);
      return imageBitmap;
    }).catch(function(e) {
      if (onError) onError(e);
      Cache.remove(url);
      scope.manager.itemError(url);
      scope.manager.itemEnd(url);
    });
    Cache.add(url, promise);
    scope.manager.itemStart(url);
  }
}
class Clock {
  static {
    __name(this, "Clock");
  }
  constructor(autoStart = true) {
    this.autoStart = autoStart;
    this.startTime = 0;
    this.oldTime = 0;
    this.elapsedTime = 0;
    this.running = false;
  }
  start() {
    this.startTime = now();
    this.oldTime = this.startTime;
    this.elapsedTime = 0;
    this.running = true;
  }
  stop() {
    this.getElapsedTime();
    this.running = false;
    this.autoStart = false;
  }
  getElapsedTime() {
    this.getDelta();
    return this.elapsedTime;
  }
  getDelta() {
    let diff = 0;
    if (this.autoStart && !this.running) {
      this.start();
      return 0;
    }
    if (this.running) {
      const newTime = now();
      diff = (newTime - this.oldTime) / 1e3;
      this.oldTime = newTime;
      this.elapsedTime += diff;
    }
    return diff;
  }
}
function now() {
  return performance.now();
}
__name(now, "now");
class PropertyMixer {
  static {
    __name(this, "PropertyMixer");
  }
  constructor(binding, typeName, valueSize) {
    this.binding = binding;
    this.valueSize = valueSize;
    let mixFunction, mixFunctionAdditive, setIdentity;
    switch (typeName) {
      case "quaternion":
        mixFunction = this._slerp;
        mixFunctionAdditive = this._slerpAdditive;
        setIdentity = this._setAdditiveIdentityQuaternion;
        this.buffer = new Float64Array(valueSize * 6);
        this._workIndex = 5;
        break;
      case "string":
      case "bool":
        mixFunction = this._select;
        mixFunctionAdditive = this._select;
        setIdentity = this._setAdditiveIdentityOther;
        this.buffer = new Array(valueSize * 5);
        break;
      default:
        mixFunction = this._lerp;
        mixFunctionAdditive = this._lerpAdditive;
        setIdentity = this._setAdditiveIdentityNumeric;
        this.buffer = new Float64Array(valueSize * 5);
    }
    this._mixBufferRegion = mixFunction;
    this._mixBufferRegionAdditive = mixFunctionAdditive;
    this._setIdentity = setIdentity;
    this._origIndex = 3;
    this._addIndex = 4;
    this.cumulativeWeight = 0;
    this.cumulativeWeightAdditive = 0;
    this.useCount = 0;
    this.referenceCount = 0;
  }
  // accumulate data in the 'incoming' region into 'accu<i>'
  accumulate(accuIndex, weight) {
    const buffer = this.buffer, stride = this.valueSize, offset = accuIndex * stride + stride;
    let currentWeight = this.cumulativeWeight;
    if (currentWeight === 0) {
      for (let i = 0; i !== stride; ++i) {
        buffer[offset + i] = buffer[i];
      }
      currentWeight = weight;
    } else {
      currentWeight += weight;
      const mix = weight / currentWeight;
      this._mixBufferRegion(buffer, offset, 0, mix, stride);
    }
    this.cumulativeWeight = currentWeight;
  }
  // accumulate data in the 'incoming' region into 'add'
  accumulateAdditive(weight) {
    const buffer = this.buffer, stride = this.valueSize, offset = stride * this._addIndex;
    if (this.cumulativeWeightAdditive === 0) {
      this._setIdentity();
    }
    this._mixBufferRegionAdditive(buffer, offset, 0, weight, stride);
    this.cumulativeWeightAdditive += weight;
  }
  // apply the state of 'accu<i>' to the binding when accus differ
  apply(accuIndex) {
    const stride = this.valueSize, buffer = this.buffer, offset = accuIndex * stride + stride, weight = this.cumulativeWeight, weightAdditive = this.cumulativeWeightAdditive, binding = this.binding;
    this.cumulativeWeight = 0;
    this.cumulativeWeightAdditive = 0;
    if (weight < 1) {
      const originalValueOffset = stride * this._origIndex;
      this._mixBufferRegion(
        buffer,
        offset,
        originalValueOffset,
        1 - weight,
        stride
      );
    }
    if (weightAdditive > 0) {
      this._mixBufferRegionAdditive(buffer, offset, this._addIndex * stride, 1, stride);
    }
    for (let i = stride, e = stride + stride; i !== e; ++i) {
      if (buffer[i] !== buffer[i + stride]) {
        binding.setValue(buffer, offset);
        break;
      }
    }
  }
  // remember the state of the bound property and copy it to both accus
  saveOriginalState() {
    const binding = this.binding;
    const buffer = this.buffer, stride = this.valueSize, originalValueOffset = stride * this._origIndex;
    binding.getValue(buffer, originalValueOffset);
    for (let i = stride, e = originalValueOffset; i !== e; ++i) {
      buffer[i] = buffer[originalValueOffset + i % stride];
    }
    this._setIdentity();
    this.cumulativeWeight = 0;
    this.cumulativeWeightAdditive = 0;
  }
  // apply the state previously taken via 'saveOriginalState' to the binding
  restoreOriginalState() {
    const originalValueOffset = this.valueSize * 3;
    this.binding.setValue(this.buffer, originalValueOffset);
  }
  _setAdditiveIdentityNumeric() {
    const startIndex = this._addIndex * this.valueSize;
    const endIndex = startIndex + this.valueSize;
    for (let i = startIndex; i < endIndex; i++) {
      this.buffer[i] = 0;
    }
  }
  _setAdditiveIdentityQuaternion() {
    this._setAdditiveIdentityNumeric();
    this.buffer[this._addIndex * this.valueSize + 3] = 1;
  }
  _setAdditiveIdentityOther() {
    const startIndex = this._origIndex * this.valueSize;
    const targetIndex = this._addIndex * this.valueSize;
    for (let i = 0; i < this.valueSize; i++) {
      this.buffer[targetIndex + i] = this.buffer[startIndex + i];
    }
  }
  // mix functions
  _select(buffer, dstOffset, srcOffset, t, stride) {
    if (t >= 0.5) {
      for (let i = 0; i !== stride; ++i) {
        buffer[dstOffset + i] = buffer[srcOffset + i];
      }
    }
  }
  _slerp(buffer, dstOffset, srcOffset, t) {
    Quaternion.slerpFlat(buffer, dstOffset, buffer, dstOffset, buffer, srcOffset, t);
  }
  _slerpAdditive(buffer, dstOffset, srcOffset, t, stride) {
    const workOffset = this._workIndex * stride;
    Quaternion.multiplyQuaternionsFlat(buffer, workOffset, buffer, dstOffset, buffer, srcOffset);
    Quaternion.slerpFlat(buffer, dstOffset, buffer, dstOffset, buffer, workOffset, t);
  }
  _lerp(buffer, dstOffset, srcOffset, t, stride) {
    const s = 1 - t;
    for (let i = 0; i !== stride; ++i) {
      const j = dstOffset + i;
      buffer[j] = buffer[j] * s + buffer[srcOffset + i] * t;
    }
  }
  _lerpAdditive(buffer, dstOffset, srcOffset, t, stride) {
    for (let i = 0; i !== stride; ++i) {
      const j = dstOffset + i;
      buffer[j] = buffer[j] + buffer[srcOffset + i] * t;
    }
  }
}
const _RESERVED_CHARS_RE = "\\[\\]\\.:\\/";
const _reservedRe = new RegExp("[" + _RESERVED_CHARS_RE + "]", "g");
const _wordChar = "[^" + _RESERVED_CHARS_RE + "]";
const _wordCharOrDot = "[^" + _RESERVED_CHARS_RE.replace("\\.", "") + "]";
const _directoryRe = /* @__PURE__ */ /((?:WC+[\/:])*)/.source.replace("WC", _wordChar);
const _nodeRe = /* @__PURE__ */ /(WCOD+)?/.source.replace("WCOD", _wordCharOrDot);
const _objectRe = /* @__PURE__ */ /(?:\.(WC+)(?:\[(.+)\])?)?/.source.replace("WC", _wordChar);
const _propertyRe = /* @__PURE__ */ /\.(WC+)(?:\[(.+)\])?/.source.replace("WC", _wordChar);
const _trackRe = new RegExp(
  "^" + _directoryRe + _nodeRe + _objectRe + _propertyRe + "$"
);
const _supportedObjectNames = ["material", "materials", "bones", "map"];
class Composite {
  static {
    __name(this, "Composite");
  }
  constructor(targetGroup, path, optionalParsedPath) {
    const parsedPath = optionalParsedPath || PropertyBinding.parseTrackName(path);
    this._targetGroup = targetGroup;
    this._bindings = targetGroup.subscribe_(path, parsedPath);
  }
  getValue(array, offset) {
    this.bind();
    const firstValidIndex = this._targetGroup.nCachedObjects_, binding = this._bindings[firstValidIndex];
    if (binding !== void 0) binding.getValue(array, offset);
  }
  setValue(array, offset) {
    const bindings = this._bindings;
    for (let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
      bindings[i].setValue(array, offset);
    }
  }
  bind() {
    const bindings = this._bindings;
    for (let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
      bindings[i].bind();
    }
  }
  unbind() {
    const bindings = this._bindings;
    for (let i = this._targetGroup.nCachedObjects_, n = bindings.length; i !== n; ++i) {
      bindings[i].unbind();
    }
  }
}
class PropertyBinding {
  static {
    __name(this, "PropertyBinding");
  }
  constructor(rootNode, path, parsedPath) {
    this.path = path;
    this.parsedPath = parsedPath || PropertyBinding.parseTrackName(path);
    this.node = PropertyBinding.findNode(rootNode, this.parsedPath.nodeName);
    this.rootNode = rootNode;
    this.getValue = this._getValue_unbound;
    this.setValue = this._setValue_unbound;
  }
  static create(root, path, parsedPath) {
    if (!(root && root.isAnimationObjectGroup)) {
      return new PropertyBinding(root, path, parsedPath);
    } else {
      return new PropertyBinding.Composite(root, path, parsedPath);
    }
  }
  /**
   * Replaces spaces with underscores and removes unsupported characters from
   * node names, to ensure compatibility with parseTrackName().
   *
   * @param {string} name Node name to be sanitized.
   * @return {string}
   */
  static sanitizeNodeName(name) {
    return name.replace(/\s/g, "_").replace(_reservedRe, "");
  }
  static parseTrackName(trackName) {
    const matches = _trackRe.exec(trackName);
    if (matches === null) {
      throw new Error("PropertyBinding: Cannot parse trackName: " + trackName);
    }
    const results = {
      // directoryName: matches[ 1 ], // (tschw) currently unused
      nodeName: matches[2],
      objectName: matches[3],
      objectIndex: matches[4],
      propertyName: matches[5],
      // required
      propertyIndex: matches[6]
    };
    const lastDot = results.nodeName && results.nodeName.lastIndexOf(".");
    if (lastDot !== void 0 && lastDot !== -1) {
      const objectName = results.nodeName.substring(lastDot + 1);
      if (_supportedObjectNames.indexOf(objectName) !== -1) {
        results.nodeName = results.nodeName.substring(0, lastDot);
        results.objectName = objectName;
      }
    }
    if (results.propertyName === null || results.propertyName.length === 0) {
      throw new Error("PropertyBinding: can not parse propertyName from trackName: " + trackName);
    }
    return results;
  }
  static findNode(root, nodeName) {
    if (nodeName === void 0 || nodeName === "" || nodeName === "." || nodeName === -1 || nodeName === root.name || nodeName === root.uuid) {
      return root;
    }
    if (root.skeleton) {
      const bone = root.skeleton.getBoneByName(nodeName);
      if (bone !== void 0) {
        return bone;
      }
    }
    if (root.children) {
      const searchNodeSubtree = /* @__PURE__ */ __name(function(children) {
        for (let i = 0; i < children.length; i++) {
          const childNode = children[i];
          if (childNode.name === nodeName || childNode.uuid === nodeName) {
            return childNode;
          }
          const result = searchNodeSubtree(childNode.children);
          if (result) return result;
        }
        return null;
      }, "searchNodeSubtree");
      const subTreeNode = searchNodeSubtree(root.children);
      if (subTreeNode) {
        return subTreeNode;
      }
    }
    return null;
  }
  // these are used to "bind" a nonexistent property
  _getValue_unavailable() {
  }
  _setValue_unavailable() {
  }
  // Getters
  _getValue_direct(buffer, offset) {
    buffer[offset] = this.targetObject[this.propertyName];
  }
  _getValue_array(buffer, offset) {
    const source = this.resolvedProperty;
    for (let i = 0, n = source.length; i !== n; ++i) {
      buffer[offset++] = source[i];
    }
  }
  _getValue_arrayElement(buffer, offset) {
    buffer[offset] = this.resolvedProperty[this.propertyIndex];
  }
  _getValue_toArray(buffer, offset) {
    this.resolvedProperty.toArray(buffer, offset);
  }
  // Direct
  _setValue_direct(buffer, offset) {
    this.targetObject[this.propertyName] = buffer[offset];
  }
  _setValue_direct_setNeedsUpdate(buffer, offset) {
    this.targetObject[this.propertyName] = buffer[offset];
    this.targetObject.needsUpdate = true;
  }
  _setValue_direct_setMatrixWorldNeedsUpdate(buffer, offset) {
    this.targetObject[this.propertyName] = buffer[offset];
    this.targetObject.matrixWorldNeedsUpdate = true;
  }
  // EntireArray
  _setValue_array(buffer, offset) {
    const dest = this.resolvedProperty;
    for (let i = 0, n = dest.length; i !== n; ++i) {
      dest[i] = buffer[offset++];
    }
  }
  _setValue_array_setNeedsUpdate(buffer, offset) {
    const dest = this.resolvedProperty;
    for (let i = 0, n = dest.length; i !== n; ++i) {
      dest[i] = buffer[offset++];
    }
    this.targetObject.needsUpdate = true;
  }
  _setValue_array_setMatrixWorldNeedsUpdate(buffer, offset) {
    const dest = this.resolvedProperty;
    for (let i = 0, n = dest.length; i !== n; ++i) {
      dest[i] = buffer[offset++];
    }
    this.targetObject.matrixWorldNeedsUpdate = true;
  }
  // ArrayElement
  _setValue_arrayElement(buffer, offset) {
    this.resolvedProperty[this.propertyIndex] = buffer[offset];
  }
  _setValue_arrayElement_setNeedsUpdate(buffer, offset) {
    this.resolvedProperty[this.propertyIndex] = buffer[offset];
    this.targetObject.needsUpdate = true;
  }
  _setValue_arrayElement_setMatrixWorldNeedsUpdate(buffer, offset) {
    this.resolvedProperty[this.propertyIndex] = buffer[offset];
    this.targetObject.matrixWorldNeedsUpdate = true;
  }
  // HasToFromArray
  _setValue_fromArray(buffer, offset) {
    this.resolvedProperty.fromArray(buffer, offset);
  }
  _setValue_fromArray_setNeedsUpdate(buffer, offset) {
    this.resolvedProperty.fromArray(buffer, offset);
    this.targetObject.needsUpdate = true;
  }
  _setValue_fromArray_setMatrixWorldNeedsUpdate(buffer, offset) {
    this.resolvedProperty.fromArray(buffer, offset);
    this.targetObject.matrixWorldNeedsUpdate = true;
  }
  _getValue_unbound(targetArray, offset) {
    this.bind();
    this.getValue(targetArray, offset);
  }
  _setValue_unbound(sourceArray, offset) {
    this.bind();
    this.setValue(sourceArray, offset);
  }
  // create getter / setter pair for a property in the scene graph
  bind() {
    let targetObject = this.node;
    const parsedPath = this.parsedPath;
    const objectName = parsedPath.objectName;
    const propertyName = parsedPath.propertyName;
    let propertyIndex = parsedPath.propertyIndex;
    if (!targetObject) {
      targetObject = PropertyBinding.findNode(this.rootNode, parsedPath.nodeName);
      this.node = targetObject;
    }
    this.getValue = this._getValue_unavailable;
    this.setValue = this._setValue_unavailable;
    if (!targetObject) {
      console.warn("THREE.PropertyBinding: No target node found for track: " + this.path + ".");
      return;
    }
    if (objectName) {
      let objectIndex = parsedPath.objectIndex;
      switch (objectName) {
        case "materials":
          if (!targetObject.material) {
            console.error("THREE.PropertyBinding: Can not bind to material as node does not have a material.", this);
            return;
          }
          if (!targetObject.material.materials) {
            console.error("THREE.PropertyBinding: Can not bind to material.materials as node.material does not have a materials array.", this);
            return;
          }
          targetObject = targetObject.material.materials;
          break;
        case "bones":
          if (!targetObject.skeleton) {
            console.error("THREE.PropertyBinding: Can not bind to bones as node does not have a skeleton.", this);
            return;
          }
          targetObject = targetObject.skeleton.bones;
          for (let i = 0; i < targetObject.length; i++) {
            if (targetObject[i].name === objectIndex) {
              objectIndex = i;
              break;
            }
          }
          break;
        case "map":
          if ("map" in targetObject) {
            targetObject = targetObject.map;
            break;
          }
          if (!targetObject.material) {
            console.error("THREE.PropertyBinding: Can not bind to material as node does not have a material.", this);
            return;
          }
          if (!targetObject.material.map) {
            console.error("THREE.PropertyBinding: Can not bind to material.map as node.material does not have a map.", this);
            return;
          }
          targetObject = targetObject.material.map;
          break;
        default:
          if (targetObject[objectName] === void 0) {
            console.error("THREE.PropertyBinding: Can not bind to objectName of node undefined.", this);
            return;
          }
          targetObject = targetObject[objectName];
      }
      if (objectIndex !== void 0) {
        if (targetObject[objectIndex] === void 0) {
          console.error("THREE.PropertyBinding: Trying to bind to objectIndex of objectName, but is undefined.", this, targetObject);
          return;
        }
        targetObject = targetObject[objectIndex];
      }
    }
    const nodeProperty = targetObject[propertyName];
    if (nodeProperty === void 0) {
      const nodeName = parsedPath.nodeName;
      console.error("THREE.PropertyBinding: Trying to update property for track: " + nodeName + "." + propertyName + " but it wasn't found.", targetObject);
      return;
    }
    let versioning = this.Versioning.None;
    this.targetObject = targetObject;
    if (targetObject.needsUpdate !== void 0) {
      versioning = this.Versioning.NeedsUpdate;
    } else if (targetObject.matrixWorldNeedsUpdate !== void 0) {
      versioning = this.Versioning.MatrixWorldNeedsUpdate;
    }
    let bindingType = this.BindingType.Direct;
    if (propertyIndex !== void 0) {
      if (propertyName === "morphTargetInfluences") {
        if (!targetObject.geometry) {
          console.error("THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.", this);
          return;
        }
        if (!targetObject.geometry.morphAttributes) {
          console.error("THREE.PropertyBinding: Can not bind to morphTargetInfluences because node does not have a geometry.morphAttributes.", this);
          return;
        }
        if (targetObject.morphTargetDictionary[propertyIndex] !== void 0) {
          propertyIndex = targetObject.morphTargetDictionary[propertyIndex];
        }
      }
      bindingType = this.BindingType.ArrayElement;
      this.resolvedProperty = nodeProperty;
      this.propertyIndex = propertyIndex;
    } else if (nodeProperty.fromArray !== void 0 && nodeProperty.toArray !== void 0) {
      bindingType = this.BindingType.HasFromToArray;
      this.resolvedProperty = nodeProperty;
    } else if (Array.isArray(nodeProperty)) {
      bindingType = this.BindingType.EntireArray;
      this.resolvedProperty = nodeProperty;
    } else {
      this.propertyName = propertyName;
    }
    this.getValue = this.GetterByBindingType[bindingType];
    this.setValue = this.SetterByBindingTypeAndVersioning[bindingType][versioning];
  }
  unbind() {
    this.node = null;
    this.getValue = this._getValue_unbound;
    this.setValue = this._setValue_unbound;
  }
}
PropertyBinding.Composite = Composite;
PropertyBinding.prototype.BindingType = {
  Direct: 0,
  EntireArray: 1,
  ArrayElement: 2,
  HasFromToArray: 3
};
PropertyBinding.prototype.Versioning = {
  None: 0,
  NeedsUpdate: 1,
  MatrixWorldNeedsUpdate: 2
};
PropertyBinding.prototype.GetterByBindingType = [
  PropertyBinding.prototype._getValue_direct,
  PropertyBinding.prototype._getValue_array,
  PropertyBinding.prototype._getValue_arrayElement,
  PropertyBinding.prototype._getValue_toArray
];
PropertyBinding.prototype.SetterByBindingTypeAndVersioning = [
  [
    // Direct
    PropertyBinding.prototype._setValue_direct,
    PropertyBinding.prototype._setValue_direct_setNeedsUpdate,
    PropertyBinding.prototype._setValue_direct_setMatrixWorldNeedsUpdate
  ],
  [
    // EntireArray
    PropertyBinding.prototype._setValue_array,
    PropertyBinding.prototype._setValue_array_setNeedsUpdate,
    PropertyBinding.prototype._setValue_array_setMatrixWorldNeedsUpdate
  ],
  [
    // ArrayElement
    PropertyBinding.prototype._setValue_arrayElement,
    PropertyBinding.prototype._setValue_arrayElement_setNeedsUpdate,
    PropertyBinding.prototype._setValue_arrayElement_setMatrixWorldNeedsUpdate
  ],
  [
    // HasToFromArray
    PropertyBinding.prototype._setValue_fromArray,
    PropertyBinding.prototype._setValue_fromArray_setNeedsUpdate,
    PropertyBinding.prototype._setValue_fromArray_setMatrixWorldNeedsUpdate
  ]
];
class AnimationAction {
  static {
    __name(this, "AnimationAction");
  }
  constructor(mixer, clip, localRoot = null, blendMode = clip.blendMode) {
    this._mixer = mixer;
    this._clip = clip;
    this._localRoot = localRoot;
    this.blendMode = blendMode;
    const tracks = clip.tracks, nTracks = tracks.length, interpolants = new Array(nTracks);
    const interpolantSettings = {
      endingStart: ZeroCurvatureEnding,
      endingEnd: ZeroCurvatureEnding
    };
    for (let i = 0; i !== nTracks; ++i) {
      const interpolant = tracks[i].createInterpolant(null);
      interpolants[i] = interpolant;
      interpolant.settings = interpolantSettings;
    }
    this._interpolantSettings = interpolantSettings;
    this._interpolants = interpolants;
    this._propertyBindings = new Array(nTracks);
    this._cacheIndex = null;
    this._byClipCacheIndex = null;
    this._timeScaleInterpolant = null;
    this._weightInterpolant = null;
    this.loop = LoopRepeat;
    this._loopCount = -1;
    this._startTime = null;
    this.time = 0;
    this.timeScale = 1;
    this._effectiveTimeScale = 1;
    this.weight = 1;
    this._effectiveWeight = 1;
    this.repetitions = Infinity;
    this.paused = false;
    this.enabled = true;
    this.clampWhenFinished = false;
    this.zeroSlopeAtStart = true;
    this.zeroSlopeAtEnd = true;
  }
  // State & Scheduling
  play() {
    this._mixer._activateAction(this);
    return this;
  }
  stop() {
    this._mixer._deactivateAction(this);
    return this.reset();
  }
  reset() {
    this.paused = false;
    this.enabled = true;
    this.time = 0;
    this._loopCount = -1;
    this._startTime = null;
    return this.stopFading().stopWarping();
  }
  isRunning() {
    return this.enabled && !this.paused && this.timeScale !== 0 && this._startTime === null && this._mixer._isActiveAction(this);
  }
  // return true when play has been called
  isScheduled() {
    return this._mixer._isActiveAction(this);
  }
  startAt(time) {
    this._startTime = time;
    return this;
  }
  setLoop(mode, repetitions) {
    this.loop = mode;
    this.repetitions = repetitions;
    return this;
  }
  // Weight
  // set the weight stopping any scheduled fading
  // although .enabled = false yields an effective weight of zero, this
  // method does *not* change .enabled, because it would be confusing
  setEffectiveWeight(weight) {
    this.weight = weight;
    this._effectiveWeight = this.enabled ? weight : 0;
    return this.stopFading();
  }
  // return the weight considering fading and .enabled
  getEffectiveWeight() {
    return this._effectiveWeight;
  }
  fadeIn(duration) {
    return this._scheduleFading(duration, 0, 1);
  }
  fadeOut(duration) {
    return this._scheduleFading(duration, 1, 0);
  }
  crossFadeFrom(fadeOutAction, duration, warp) {
    fadeOutAction.fadeOut(duration);
    this.fadeIn(duration);
    if (warp) {
      const fadeInDuration = this._clip.duration, fadeOutDuration = fadeOutAction._clip.duration, startEndRatio = fadeOutDuration / fadeInDuration, endStartRatio = fadeInDuration / fadeOutDuration;
      fadeOutAction.warp(1, startEndRatio, duration);
      this.warp(endStartRatio, 1, duration);
    }
    return this;
  }
  crossFadeTo(fadeInAction, duration, warp) {
    return fadeInAction.crossFadeFrom(this, duration, warp);
  }
  stopFading() {
    const weightInterpolant = this._weightInterpolant;
    if (weightInterpolant !== null) {
      this._weightInterpolant = null;
      this._mixer._takeBackControlInterpolant(weightInterpolant);
    }
    return this;
  }
  // Time Scale Control
  // set the time scale stopping any scheduled warping
  // although .paused = true yields an effective time scale of zero, this
  // method does *not* change .paused, because it would be confusing
  setEffectiveTimeScale(timeScale) {
    this.timeScale = timeScale;
    this._effectiveTimeScale = this.paused ? 0 : timeScale;
    return this.stopWarping();
  }
  // return the time scale considering warping and .paused
  getEffectiveTimeScale() {
    return this._effectiveTimeScale;
  }
  setDuration(duration) {
    this.timeScale = this._clip.duration / duration;
    return this.stopWarping();
  }
  syncWith(action) {
    this.time = action.time;
    this.timeScale = action.timeScale;
    return this.stopWarping();
  }
  halt(duration) {
    return this.warp(this._effectiveTimeScale, 0, duration);
  }
  warp(startTimeScale, endTimeScale, duration) {
    const mixer = this._mixer, now2 = mixer.time, timeScale = this.timeScale;
    let interpolant = this._timeScaleInterpolant;
    if (interpolant === null) {
      interpolant = mixer._lendControlInterpolant();
      this._timeScaleInterpolant = interpolant;
    }
    const times = interpolant.parameterPositions, values = interpolant.sampleValues;
    times[0] = now2;
    times[1] = now2 + duration;
    values[0] = startTimeScale / timeScale;
    values[1] = endTimeScale / timeScale;
    return this;
  }
  stopWarping() {
    const timeScaleInterpolant = this._timeScaleInterpolant;
    if (timeScaleInterpolant !== null) {
      this._timeScaleInterpolant = null;
      this._mixer._takeBackControlInterpolant(timeScaleInterpolant);
    }
    return this;
  }
  // Object Accessors
  getMixer() {
    return this._mixer;
  }
  getClip() {
    return this._clip;
  }
  getRoot() {
    return this._localRoot || this._mixer._root;
  }
  // Interna
  _update(time, deltaTime, timeDirection, accuIndex) {
    if (!this.enabled) {
      this._updateWeight(time);
      return;
    }
    const startTime = this._startTime;
    if (startTime !== null) {
      const timeRunning = (time - startTime) * timeDirection;
      if (timeRunning < 0 || timeDirection === 0) {
        deltaTime = 0;
      } else {
        this._startTime = null;
        deltaTime = timeDirection * timeRunning;
      }
    }
    deltaTime *= this._updateTimeScale(time);
    const clipTime = this._updateTime(deltaTime);
    const weight = this._updateWeight(time);
    if (weight > 0) {
      const interpolants = this._interpolants;
      const propertyMixers = this._propertyBindings;
      switch (this.blendMode) {
        case AdditiveAnimationBlendMode:
          for (let j = 0, m = interpolants.length; j !== m; ++j) {
            interpolants[j].evaluate(clipTime);
            propertyMixers[j].accumulateAdditive(weight);
          }
          break;
        case NormalAnimationBlendMode:
        default:
          for (let j = 0, m = interpolants.length; j !== m; ++j) {
            interpolants[j].evaluate(clipTime);
            propertyMixers[j].accumulate(accuIndex, weight);
          }
      }
    }
  }
  _updateWeight(time) {
    let weight = 0;
    if (this.enabled) {
      weight = this.weight;
      const interpolant = this._weightInterpolant;
      if (interpolant !== null) {
        const interpolantValue = interpolant.evaluate(time)[0];
        weight *= interpolantValue;
        if (time > interpolant.parameterPositions[1]) {
          this.stopFading();
          if (interpolantValue === 0) {
            this.enabled = false;
          }
        }
      }
    }
    this._effectiveWeight = weight;
    return weight;
  }
  _updateTimeScale(time) {
    let timeScale = 0;
    if (!this.paused) {
      timeScale = this.timeScale;
      const interpolant = this._timeScaleInterpolant;
      if (interpolant !== null) {
        const interpolantValue = interpolant.evaluate(time)[0];
        timeScale *= interpolantValue;
        if (time > interpolant.parameterPositions[1]) {
          this.stopWarping();
          if (timeScale === 0) {
            this.paused = true;
          } else {
            this.timeScale = timeScale;
          }
        }
      }
    }
    this._effectiveTimeScale = timeScale;
    return timeScale;
  }
  _updateTime(deltaTime) {
    const duration = this._clip.duration;
    const loop = this.loop;
    let time = this.time + deltaTime;
    let loopCount = this._loopCount;
    const pingPong = loop === LoopPingPong;
    if (deltaTime === 0) {
      if (loopCount === -1) return time;
      return pingPong && (loopCount & 1) === 1 ? duration - time : time;
    }
    if (loop === LoopOnce) {
      if (loopCount === -1) {
        this._loopCount = 0;
        this._setEndings(true, true, false);
      }
      handle_stop: {
        if (time >= duration) {
          time = duration;
        } else if (time < 0) {
          time = 0;
        } else {
          this.time = time;
          break handle_stop;
        }
        if (this.clampWhenFinished) this.paused = true;
        else this.enabled = false;
        this.time = time;
        this._mixer.dispatchEvent({
          type: "finished",
          action: this,
          direction: deltaTime < 0 ? -1 : 1
        });
      }
    } else {
      if (loopCount === -1) {
        if (deltaTime >= 0) {
          loopCount = 0;
          this._setEndings(true, this.repetitions === 0, pingPong);
        } else {
          this._setEndings(this.repetitions === 0, true, pingPong);
        }
      }
      if (time >= duration || time < 0) {
        const loopDelta = Math.floor(time / duration);
        time -= duration * loopDelta;
        loopCount += Math.abs(loopDelta);
        const pending = this.repetitions - loopCount;
        if (pending <= 0) {
          if (this.clampWhenFinished) this.paused = true;
          else this.enabled = false;
          time = deltaTime > 0 ? duration : 0;
          this.time = time;
          this._mixer.dispatchEvent({
            type: "finished",
            action: this,
            direction: deltaTime > 0 ? 1 : -1
          });
        } else {
          if (pending === 1) {
            const atStart = deltaTime < 0;
            this._setEndings(atStart, !atStart, pingPong);
          } else {
            this._setEndings(false, false, pingPong);
          }
          this._loopCount = loopCount;
          this.time = time;
          this._mixer.dispatchEvent({
            type: "loop",
            action: this,
            loopDelta
          });
        }
      } else {
        this.time = time;
      }
      if (pingPong && (loopCount & 1) === 1) {
        return duration - time;
      }
    }
    return time;
  }
  _setEndings(atStart, atEnd, pingPong) {
    const settings = this._interpolantSettings;
    if (pingPong) {
      settings.endingStart = ZeroSlopeEnding;
      settings.endingEnd = ZeroSlopeEnding;
    } else {
      if (atStart) {
        settings.endingStart = this.zeroSlopeAtStart ? ZeroSlopeEnding : ZeroCurvatureEnding;
      } else {
        settings.endingStart = WrapAroundEnding;
      }
      if (atEnd) {
        settings.endingEnd = this.zeroSlopeAtEnd ? ZeroSlopeEnding : ZeroCurvatureEnding;
      } else {
        settings.endingEnd = WrapAroundEnding;
      }
    }
  }
  _scheduleFading(duration, weightNow, weightThen) {
    const mixer = this._mixer, now2 = mixer.time;
    let interpolant = this._weightInterpolant;
    if (interpolant === null) {
      interpolant = mixer._lendControlInterpolant();
      this._weightInterpolant = interpolant;
    }
    const times = interpolant.parameterPositions, values = interpolant.sampleValues;
    times[0] = now2;
    values[0] = weightNow;
    times[1] = now2 + duration;
    values[1] = weightThen;
    return this;
  }
}
const _controlInterpolantsResultBuffer = new Float32Array(1);
class AnimationMixer extends EventDispatcher {
  static {
    __name(this, "AnimationMixer");
  }
  constructor(root) {
    super();
    this._root = root;
    this._initMemoryManager();
    this._accuIndex = 0;
    this.time = 0;
    this.timeScale = 1;
  }
  _bindAction(action, prototypeAction) {
    const root = action._localRoot || this._root, tracks = action._clip.tracks, nTracks = tracks.length, bindings = action._propertyBindings, interpolants = action._interpolants, rootUuid = root.uuid, bindingsByRoot = this._bindingsByRootAndName;
    let bindingsByName = bindingsByRoot[rootUuid];
    if (bindingsByName === void 0) {
      bindingsByName = {};
      bindingsByRoot[rootUuid] = bindingsByName;
    }
    for (let i = 0; i !== nTracks; ++i) {
      const track = tracks[i], trackName = track.name;
      let binding = bindingsByName[trackName];
      if (binding !== void 0) {
        ++binding.referenceCount;
        bindings[i] = binding;
      } else {
        binding = bindings[i];
        if (binding !== void 0) {
          if (binding._cacheIndex === null) {
            ++binding.referenceCount;
            this._addInactiveBinding(binding, rootUuid, trackName);
          }
          continue;
        }
        const path = prototypeAction && prototypeAction._propertyBindings[i].binding.parsedPath;
        binding = new PropertyMixer(
          PropertyBinding.create(root, trackName, path),
          track.ValueTypeName,
          track.getValueSize()
        );
        ++binding.referenceCount;
        this._addInactiveBinding(binding, rootUuid, trackName);
        bindings[i] = binding;
      }
      interpolants[i].resultBuffer = binding.buffer;
    }
  }
  _activateAction(action) {
    if (!this._isActiveAction(action)) {
      if (action._cacheIndex === null) {
        const rootUuid = (action._localRoot || this._root).uuid, clipUuid = action._clip.uuid, actionsForClip = this._actionsByClip[clipUuid];
        this._bindAction(
          action,
          actionsForClip && actionsForClip.knownActions[0]
        );
        this._addInactiveAction(action, clipUuid, rootUuid);
      }
      const bindings = action._propertyBindings;
      for (let i = 0, n = bindings.length; i !== n; ++i) {
        const binding = bindings[i];
        if (binding.useCount++ === 0) {
          this._lendBinding(binding);
          binding.saveOriginalState();
        }
      }
      this._lendAction(action);
    }
  }
  _deactivateAction(action) {
    if (this._isActiveAction(action)) {
      const bindings = action._propertyBindings;
      for (let i = 0, n = bindings.length; i !== n; ++i) {
        const binding = bindings[i];
        if (--binding.useCount === 0) {
          binding.restoreOriginalState();
          this._takeBackBinding(binding);
        }
      }
      this._takeBackAction(action);
    }
  }
  // Memory manager
  _initMemoryManager() {
    this._actions = [];
    this._nActiveActions = 0;
    this._actionsByClip = {};
    this._bindings = [];
    this._nActiveBindings = 0;
    this._bindingsByRootAndName = {};
    this._controlInterpolants = [];
    this._nActiveControlInterpolants = 0;
    const scope = this;
    this.stats = {
      actions: {
        get total() {
          return scope._actions.length;
        },
        get inUse() {
          return scope._nActiveActions;
        }
      },
      bindings: {
        get total() {
          return scope._bindings.length;
        },
        get inUse() {
          return scope._nActiveBindings;
        }
      },
      controlInterpolants: {
        get total() {
          return scope._controlInterpolants.length;
        },
        get inUse() {
          return scope._nActiveControlInterpolants;
        }
      }
    };
  }
  // Memory management for AnimationAction objects
  _isActiveAction(action) {
    const index = action._cacheIndex;
    return index !== null && index < this._nActiveActions;
  }
  _addInactiveAction(action, clipUuid, rootUuid) {
    const actions = this._actions, actionsByClip = this._actionsByClip;
    let actionsForClip = actionsByClip[clipUuid];
    if (actionsForClip === void 0) {
      actionsForClip = {
        knownActions: [action],
        actionByRoot: {}
      };
      action._byClipCacheIndex = 0;
      actionsByClip[clipUuid] = actionsForClip;
    } else {
      const knownActions = actionsForClip.knownActions;
      action._byClipCacheIndex = knownActions.length;
      knownActions.push(action);
    }
    action._cacheIndex = actions.length;
    actions.push(action);
    actionsForClip.actionByRoot[rootUuid] = action;
  }
  _removeInactiveAction(action) {
    const actions = this._actions, lastInactiveAction = actions[actions.length - 1], cacheIndex = action._cacheIndex;
    lastInactiveAction._cacheIndex = cacheIndex;
    actions[cacheIndex] = lastInactiveAction;
    actions.pop();
    action._cacheIndex = null;
    const clipUuid = action._clip.uuid, actionsByClip = this._actionsByClip, actionsForClip = actionsByClip[clipUuid], knownActionsForClip = actionsForClip.knownActions, lastKnownAction = knownActionsForClip[knownActionsForClip.length - 1], byClipCacheIndex = action._byClipCacheIndex;
    lastKnownAction._byClipCacheIndex = byClipCacheIndex;
    knownActionsForClip[byClipCacheIndex] = lastKnownAction;
    knownActionsForClip.pop();
    action._byClipCacheIndex = null;
    const actionByRoot = actionsForClip.actionByRoot, rootUuid = (action._localRoot || this._root).uuid;
    delete actionByRoot[rootUuid];
    if (knownActionsForClip.length === 0) {
      delete actionsByClip[clipUuid];
    }
    this._removeInactiveBindingsForAction(action);
  }
  _removeInactiveBindingsForAction(action) {
    const bindings = action._propertyBindings;
    for (let i = 0, n = bindings.length; i !== n; ++i) {
      const binding = bindings[i];
      if (--binding.referenceCount === 0) {
        this._removeInactiveBinding(binding);
      }
    }
  }
  _lendAction(action) {
    const actions = this._actions, prevIndex = action._cacheIndex, lastActiveIndex = this._nActiveActions++, firstInactiveAction = actions[lastActiveIndex];
    action._cacheIndex = lastActiveIndex;
    actions[lastActiveIndex] = action;
    firstInactiveAction._cacheIndex = prevIndex;
    actions[prevIndex] = firstInactiveAction;
  }
  _takeBackAction(action) {
    const actions = this._actions, prevIndex = action._cacheIndex, firstInactiveIndex = --this._nActiveActions, lastActiveAction = actions[firstInactiveIndex];
    action._cacheIndex = firstInactiveIndex;
    actions[firstInactiveIndex] = action;
    lastActiveAction._cacheIndex = prevIndex;
    actions[prevIndex] = lastActiveAction;
  }
  // Memory management for PropertyMixer objects
  _addInactiveBinding(binding, rootUuid, trackName) {
    const bindingsByRoot = this._bindingsByRootAndName, bindings = this._bindings;
    let bindingByName = bindingsByRoot[rootUuid];
    if (bindingByName === void 0) {
      bindingByName = {};
      bindingsByRoot[rootUuid] = bindingByName;
    }
    bindingByName[trackName] = binding;
    binding._cacheIndex = bindings.length;
    bindings.push(binding);
  }
  _removeInactiveBinding(binding) {
    const bindings = this._bindings, propBinding = binding.binding, rootUuid = propBinding.rootNode.uuid, trackName = propBinding.path, bindingsByRoot = this._bindingsByRootAndName, bindingByName = bindingsByRoot[rootUuid], lastInactiveBinding = bindings[bindings.length - 1], cacheIndex = binding._cacheIndex;
    lastInactiveBinding._cacheIndex = cacheIndex;
    bindings[cacheIndex] = lastInactiveBinding;
    bindings.pop();
    delete bindingByName[trackName];
    if (Object.keys(bindingByName).length === 0) {
      delete bindingsByRoot[rootUuid];
    }
  }
  _lendBinding(binding) {
    const bindings = this._bindings, prevIndex = binding._cacheIndex, lastActiveIndex = this._nActiveBindings++, firstInactiveBinding = bindings[lastActiveIndex];
    binding._cacheIndex = lastActiveIndex;
    bindings[lastActiveIndex] = binding;
    firstInactiveBinding._cacheIndex = prevIndex;
    bindings[prevIndex] = firstInactiveBinding;
  }
  _takeBackBinding(binding) {
    const bindings = this._bindings, prevIndex = binding._cacheIndex, firstInactiveIndex = --this._nActiveBindings, lastActiveBinding = bindings[firstInactiveIndex];
    binding._cacheIndex = firstInactiveIndex;
    bindings[firstInactiveIndex] = binding;
    lastActiveBinding._cacheIndex = prevIndex;
    bindings[prevIndex] = lastActiveBinding;
  }
  // Memory management of Interpolants for weight and time scale
  _lendControlInterpolant() {
    const interpolants = this._controlInterpolants, lastActiveIndex = this._nActiveControlInterpolants++;
    let interpolant = interpolants[lastActiveIndex];
    if (interpolant === void 0) {
      interpolant = new LinearInterpolant(
        new Float32Array(2),
        new Float32Array(2),
        1,
        _controlInterpolantsResultBuffer
      );
      interpolant.__cacheIndex = lastActiveIndex;
      interpolants[lastActiveIndex] = interpolant;
    }
    return interpolant;
  }
  _takeBackControlInterpolant(interpolant) {
    const interpolants = this._controlInterpolants, prevIndex = interpolant.__cacheIndex, firstInactiveIndex = --this._nActiveControlInterpolants, lastActiveInterpolant = interpolants[firstInactiveIndex];
    interpolant.__cacheIndex = firstInactiveIndex;
    interpolants[firstInactiveIndex] = interpolant;
    lastActiveInterpolant.__cacheIndex = prevIndex;
    interpolants[prevIndex] = lastActiveInterpolant;
  }
  // return an action for a clip optionally using a custom root target
  // object (this method allocates a lot of dynamic memory in case a
  // previously unknown clip/root combination is specified)
  clipAction(clip, optionalRoot, blendMode) {
    const root = optionalRoot || this._root, rootUuid = root.uuid;
    let clipObject = typeof clip === "string" ? AnimationClip.findByName(root, clip) : clip;
    const clipUuid = clipObject !== null ? clipObject.uuid : clip;
    const actionsForClip = this._actionsByClip[clipUuid];
    let prototypeAction = null;
    if (blendMode === void 0) {
      if (clipObject !== null) {
        blendMode = clipObject.blendMode;
      } else {
        blendMode = NormalAnimationBlendMode;
      }
    }
    if (actionsForClip !== void 0) {
      const existingAction = actionsForClip.actionByRoot[rootUuid];
      if (existingAction !== void 0 && existingAction.blendMode === blendMode) {
        return existingAction;
      }
      prototypeAction = actionsForClip.knownActions[0];
      if (clipObject === null)
        clipObject = prototypeAction._clip;
    }
    if (clipObject === null) return null;
    const newAction = new AnimationAction(this, clipObject, optionalRoot, blendMode);
    this._bindAction(newAction, prototypeAction);
    this._addInactiveAction(newAction, clipUuid, rootUuid);
    return newAction;
  }
  // get an existing action
  existingAction(clip, optionalRoot) {
    const root = optionalRoot || this._root, rootUuid = root.uuid, clipObject = typeof clip === "string" ? AnimationClip.findByName(root, clip) : clip, clipUuid = clipObject ? clipObject.uuid : clip, actionsForClip = this._actionsByClip[clipUuid];
    if (actionsForClip !== void 0) {
      return actionsForClip.actionByRoot[rootUuid] || null;
    }
    return null;
  }
  // deactivates all previously scheduled actions
  stopAllAction() {
    const actions = this._actions, nActions = this._nActiveActions;
    for (let i = nActions - 1; i >= 0; --i) {
      actions[i].stop();
    }
    return this;
  }
  // advance the time and update apply the animation
  update(deltaTime) {
    deltaTime *= this.timeScale;
    const actions = this._actions, nActions = this._nActiveActions, time = this.time += deltaTime, timeDirection = Math.sign(deltaTime), accuIndex = this._accuIndex ^= 1;
    for (let i = 0; i !== nActions; ++i) {
      const action = actions[i];
      action._update(time, deltaTime, timeDirection, accuIndex);
    }
    const bindings = this._bindings, nBindings = this._nActiveBindings;
    for (let i = 0; i !== nBindings; ++i) {
      bindings[i].apply(accuIndex);
    }
    return this;
  }
  // Allows you to seek to a specific time in an animation.
  setTime(timeInSeconds) {
    this.time = 0;
    for (let i = 0; i < this._actions.length; i++) {
      this._actions[i].time = 0;
    }
    return this.update(timeInSeconds);
  }
  // return this mixer's root target object
  getRoot() {
    return this._root;
  }
  // free all resources specific to a particular clip
  uncacheClip(clip) {
    const actions = this._actions, clipUuid = clip.uuid, actionsByClip = this._actionsByClip, actionsForClip = actionsByClip[clipUuid];
    if (actionsForClip !== void 0) {
      const actionsToRemove = actionsForClip.knownActions;
      for (let i = 0, n = actionsToRemove.length; i !== n; ++i) {
        const action = actionsToRemove[i];
        this._deactivateAction(action);
        const cacheIndex = action._cacheIndex, lastInactiveAction = actions[actions.length - 1];
        action._cacheIndex = null;
        action._byClipCacheIndex = null;
        lastInactiveAction._cacheIndex = cacheIndex;
        actions[cacheIndex] = lastInactiveAction;
        actions.pop();
        this._removeInactiveBindingsForAction(action);
      }
      delete actionsByClip[clipUuid];
    }
  }
  // free all resources specific to a particular root target object
  uncacheRoot(root) {
    const rootUuid = root.uuid, actionsByClip = this._actionsByClip;
    for (const clipUuid in actionsByClip) {
      const actionByRoot = actionsByClip[clipUuid].actionByRoot, action = actionByRoot[rootUuid];
      if (action !== void 0) {
        this._deactivateAction(action);
        this._removeInactiveAction(action);
      }
    }
    const bindingsByRoot = this._bindingsByRootAndName, bindingByName = bindingsByRoot[rootUuid];
    if (bindingByName !== void 0) {
      for (const trackName in bindingByName) {
        const binding = bindingByName[trackName];
        binding.restoreOriginalState();
        this._removeInactiveBinding(binding);
      }
    }
  }
  // remove a targeted clip from the cache
  uncacheAction(clip, optionalRoot) {
    const action = this.existingAction(clip, optionalRoot);
    if (action !== null) {
      this._deactivateAction(action);
      this._removeInactiveAction(action);
    }
  }
}
const _matrix = /* @__PURE__ */ new Matrix4();
class Raycaster {
  static {
    __name(this, "Raycaster");
  }
  constructor(origin, direction, near = 0, far = Infinity) {
    this.ray = new Ray(origin, direction);
    this.near = near;
    this.far = far;
    this.camera = null;
    this.layers = new Layers();
    this.params = {
      Mesh: {},
      Line: { threshold: 1 },
      LOD: {},
      Points: { threshold: 1 },
      Sprite: {}
    };
  }
  set(origin, direction) {
    this.ray.set(origin, direction);
  }
  setFromCamera(coords, camera) {
    if (camera.isPerspectiveCamera) {
      this.ray.origin.setFromMatrixPosition(camera.matrixWorld);
      this.ray.direction.set(coords.x, coords.y, 0.5).unproject(camera).sub(this.ray.origin).normalize();
      this.camera = camera;
    } else if (camera.isOrthographicCamera) {
      this.ray.origin.set(coords.x, coords.y, (camera.near + camera.far) / (camera.near - camera.far)).unproject(camera);
      this.ray.direction.set(0, 0, -1).transformDirection(camera.matrixWorld);
      this.camera = camera;
    } else {
      console.error("THREE.Raycaster: Unsupported camera type: " + camera.type);
    }
  }
  setFromXRController(controller) {
    _matrix.identity().extractRotation(controller.matrixWorld);
    this.ray.origin.setFromMatrixPosition(controller.matrixWorld);
    this.ray.direction.set(0, 0, -1).applyMatrix4(_matrix);
    return this;
  }
  intersectObject(object, recursive = true, intersects2 = []) {
    intersect(object, this, intersects2, recursive);
    intersects2.sort(ascSort);
    return intersects2;
  }
  intersectObjects(objects, recursive = true, intersects2 = []) {
    for (let i = 0, l = objects.length; i < l; i++) {
      intersect(objects[i], this, intersects2, recursive);
    }
    intersects2.sort(ascSort);
    return intersects2;
  }
}
function ascSort(a, b) {
  return a.distance - b.distance;
}
__name(ascSort, "ascSort");
function intersect(object, raycaster, intersects2, recursive) {
  let propagate = true;
  if (object.layers.test(raycaster.layers)) {
    const result = object.raycast(raycaster, intersects2);
    if (result === false) propagate = false;
  }
  if (propagate === true && recursive === true) {
    const children = object.children;
    for (let i = 0, l = children.length; i < l; i++) {
      intersect(children[i], raycaster, intersects2, true);
    }
  }
}
__name(intersect, "intersect");
class Spherical {
  static {
    __name(this, "Spherical");
  }
  constructor(radius = 1, phi = 0, theta = 0) {
    this.radius = radius;
    this.phi = phi;
    this.theta = theta;
    return this;
  }
  set(radius, phi, theta) {
    this.radius = radius;
    this.phi = phi;
    this.theta = theta;
    return this;
  }
  copy(other) {
    this.radius = other.radius;
    this.phi = other.phi;
    this.theta = other.theta;
    return this;
  }
  // restrict phi to be between EPS and PI-EPS
  makeSafe() {
    const EPS = 1e-6;
    this.phi = Math.max(EPS, Math.min(Math.PI - EPS, this.phi));
    return this;
  }
  setFromVector3(v) {
    return this.setFromCartesianCoords(v.x, v.y, v.z);
  }
  setFromCartesianCoords(x, y, z) {
    this.radius = Math.sqrt(x * x + y * y + z * z);
    if (this.radius === 0) {
      this.theta = 0;
      this.phi = 0;
    } else {
      this.theta = Math.atan2(x, z);
      this.phi = Math.acos(clamp(y / this.radius, -1, 1));
    }
    return this;
  }
  clone() {
    return new this.constructor().copy(this);
  }
}
class Matrix2 {
  static {
    __name(this, "Matrix2");
  }
  constructor(n11, n12, n21, n22) {
    Matrix2.prototype.isMatrix2 = true;
    this.elements = [
      1,
      0,
      0,
      1
    ];
    if (n11 !== void 0) {
      this.set(n11, n12, n21, n22);
    }
  }
  identity() {
    this.set(
      1,
      0,
      0,
      1
    );
    return this;
  }
  fromArray(array, offset = 0) {
    for (let i = 0; i < 4; i++) {
      this.elements[i] = array[i + offset];
    }
    return this;
  }
  set(n11, n12, n21, n22) {
    const te = this.elements;
    te[0] = n11;
    te[2] = n12;
    te[1] = n21;
    te[3] = n22;
    return this;
  }
}
class GridHelper extends LineSegments {
  static {
    __name(this, "GridHelper");
  }
  constructor(size = 10, divisions = 10, color1 = 4473924, color2 = 8947848) {
    color1 = new Color(color1);
    color2 = new Color(color2);
    const center = divisions / 2;
    const step = size / divisions;
    const halfSize = size / 2;
    const vertices = [], colors = [];
    for (let i = 0, j = 0, k = -halfSize; i <= divisions; i++, k += step) {
      vertices.push(-halfSize, 0, k, halfSize, 0, k);
      vertices.push(k, 0, -halfSize, k, 0, halfSize);
      const color = i === center ? color1 : color2;
      color.toArray(colors, j);
      j += 3;
      color.toArray(colors, j);
      j += 3;
      color.toArray(colors, j);
      j += 3;
      color.toArray(colors, j);
      j += 3;
    }
    const geometry = new BufferGeometry();
    geometry.setAttribute("position", new Float32BufferAttribute(vertices, 3));
    geometry.setAttribute("color", new Float32BufferAttribute(colors, 3));
    const material = new LineBasicMaterial({ vertexColors: true, toneMapped: false });
    super(geometry, material);
    this.type = "GridHelper";
  }
  dispose() {
    this.geometry.dispose();
    this.material.dispose();
  }
}
class Controls extends EventDispatcher {
  static {
    __name(this, "Controls");
  }
  constructor(object, domElement = null) {
    super();
    this.object = object;
    this.domElement = domElement;
    this.enabled = true;
    this.state = -1;
    this.keys = {};
    this.mouseButtons = { LEFT: null, MIDDLE: null, RIGHT: null };
    this.touches = { ONE: null, TWO: null };
  }
  connect() {
  }
  disconnect() {
  }
  dispose() {
  }
  update() {
  }
}
if (typeof __THREE_DEVTOOLS__ !== "undefined") {
  __THREE_DEVTOOLS__.dispatchEvent(new CustomEvent("register", { detail: {
    revision: REVISION
  } }));
}
if (typeof window !== "undefined") {
  if (window.__THREE__) {
    console.warn("WARNING: Multiple instances of Three.js being imported.");
  } else {
    window.__THREE__ = REVISION;
  }
}
const _changeEvent = { type: "change" };
const _startEvent = { type: "start" };
const _endEvent = { type: "end" };
const _ray = new Ray();
const _plane = new Plane();
const _TILT_LIMIT = Math.cos(70 * MathUtils.DEG2RAD);
const _v = new Vector3();
const _twoPI = 2 * Math.PI;
const _STATE = {
  NONE: -1,
  ROTATE: 0,
  DOLLY: 1,
  PAN: 2,
  TOUCH_ROTATE: 3,
  TOUCH_PAN: 4,
  TOUCH_DOLLY_PAN: 5,
  TOUCH_DOLLY_ROTATE: 6
};
const _EPS = 1e-6;
class OrbitControls extends Controls {
  static {
    __name(this, "OrbitControls");
  }
  constructor(object, domElement = null) {
    super(object, domElement);
    this.state = _STATE.NONE;
    this.enabled = true;
    this.target = new Vector3();
    this.cursor = new Vector3();
    this.minDistance = 0;
    this.maxDistance = Infinity;
    this.minZoom = 0;
    this.maxZoom = Infinity;
    this.minTargetRadius = 0;
    this.maxTargetRadius = Infinity;
    this.minPolarAngle = 0;
    this.maxPolarAngle = Math.PI;
    this.minAzimuthAngle = -Infinity;
    this.maxAzimuthAngle = Infinity;
    this.enableDamping = false;
    this.dampingFactor = 0.05;
    this.enableZoom = true;
    this.zoomSpeed = 1;
    this.enableRotate = true;
    this.rotateSpeed = 1;
    this.enablePan = true;
    this.panSpeed = 1;
    this.screenSpacePanning = true;
    this.keyPanSpeed = 7;
    this.zoomToCursor = false;
    this.autoRotate = false;
    this.autoRotateSpeed = 2;
    this.keys = { LEFT: "ArrowLeft", UP: "ArrowUp", RIGHT: "ArrowRight", BOTTOM: "ArrowDown" };
    this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN };
    this.touches = { ONE: TOUCH.ROTATE, TWO: TOUCH.DOLLY_PAN };
    this.target0 = this.target.clone();
    this.position0 = this.object.position.clone();
    this.zoom0 = this.object.zoom;
    this._domElementKeyEvents = null;
    this._lastPosition = new Vector3();
    this._lastQuaternion = new Quaternion();
    this._lastTargetPosition = new Vector3();
    this._quat = new Quaternion().setFromUnitVectors(object.up, new Vector3(0, 1, 0));
    this._quatInverse = this._quat.clone().invert();
    this._spherical = new Spherical();
    this._sphericalDelta = new Spherical();
    this._scale = 1;
    this._panOffset = new Vector3();
    this._rotateStart = new Vector2();
    this._rotateEnd = new Vector2();
    this._rotateDelta = new Vector2();
    this._panStart = new Vector2();
    this._panEnd = new Vector2();
    this._panDelta = new Vector2();
    this._dollyStart = new Vector2();
    this._dollyEnd = new Vector2();
    this._dollyDelta = new Vector2();
    this._dollyDirection = new Vector3();
    this._mouse = new Vector2();
    this._performCursorZoom = false;
    this._pointers = [];
    this._pointerPositions = {};
    this._controlActive = false;
    this._onPointerMove = onPointerMove.bind(this);
    this._onPointerDown = onPointerDown.bind(this);
    this._onPointerUp = onPointerUp.bind(this);
    this._onContextMenu = onContextMenu.bind(this);
    this._onMouseWheel = onMouseWheel.bind(this);
    this._onKeyDown = onKeyDown.bind(this);
    this._onTouchStart = onTouchStart.bind(this);
    this._onTouchMove = onTouchMove.bind(this);
    this._onMouseDown = onMouseDown.bind(this);
    this._onMouseMove = onMouseMove.bind(this);
    this._interceptControlDown = interceptControlDown.bind(this);
    this._interceptControlUp = interceptControlUp.bind(this);
    if (this.domElement !== null) {
      this.connect();
    }
    this.update();
  }
  connect() {
    this.domElement.addEventListener("pointerdown", this._onPointerDown);
    this.domElement.addEventListener("pointercancel", this._onPointerUp);
    this.domElement.addEventListener("contextmenu", this._onContextMenu);
    this.domElement.addEventListener("wheel", this._onMouseWheel, { passive: false });
    const document2 = this.domElement.getRootNode();
    document2.addEventListener("keydown", this._interceptControlDown, { passive: true, capture: true });
    this.domElement.style.touchAction = "none";
  }
  disconnect() {
    this.domElement.removeEventListener("pointerdown", this._onPointerDown);
    this.domElement.removeEventListener("pointermove", this._onPointerMove);
    this.domElement.removeEventListener("pointerup", this._onPointerUp);
    this.domElement.removeEventListener("pointercancel", this._onPointerUp);
    this.domElement.removeEventListener("wheel", this._onMouseWheel);
    this.domElement.removeEventListener("contextmenu", this._onContextMenu);
    this.stopListenToKeyEvents();
    const document2 = this.domElement.getRootNode();
    document2.removeEventListener("keydown", this._interceptControlDown, { capture: true });
    this.domElement.style.touchAction = "auto";
  }
  dispose() {
    this.disconnect();
  }
  getPolarAngle() {
    return this._spherical.phi;
  }
  getAzimuthalAngle() {
    return this._spherical.theta;
  }
  getDistance() {
    return this.object.position.distanceTo(this.target);
  }
  listenToKeyEvents(domElement) {
    domElement.addEventListener("keydown", this._onKeyDown);
    this._domElementKeyEvents = domElement;
  }
  stopListenToKeyEvents() {
    if (this._domElementKeyEvents !== null) {
      this._domElementKeyEvents.removeEventListener("keydown", this._onKeyDown);
      this._domElementKeyEvents = null;
    }
  }
  saveState() {
    this.target0.copy(this.target);
    this.position0.copy(this.object.position);
    this.zoom0 = this.object.zoom;
  }
  reset() {
    this.target.copy(this.target0);
    this.object.position.copy(this.position0);
    this.object.zoom = this.zoom0;
    this.object.updateProjectionMatrix();
    this.dispatchEvent(_changeEvent);
    this.update();
    this.state = _STATE.NONE;
  }
  update(deltaTime = null) {
    const position = this.object.position;
    _v.copy(position).sub(this.target);
    _v.applyQuaternion(this._quat);
    this._spherical.setFromVector3(_v);
    if (this.autoRotate && this.state === _STATE.NONE) {
      this._rotateLeft(this._getAutoRotationAngle(deltaTime));
    }
    if (this.enableDamping) {
      this._spherical.theta += this._sphericalDelta.theta * this.dampingFactor;
      this._spherical.phi += this._sphericalDelta.phi * this.dampingFactor;
    } else {
      this._spherical.theta += this._sphericalDelta.theta;
      this._spherical.phi += this._sphericalDelta.phi;
    }
    let min = this.minAzimuthAngle;
    let max2 = this.maxAzimuthAngle;
    if (isFinite(min) && isFinite(max2)) {
      if (min < -Math.PI) min += _twoPI;
      else if (min > Math.PI) min -= _twoPI;
      if (max2 < -Math.PI) max2 += _twoPI;
      else if (max2 > Math.PI) max2 -= _twoPI;
      if (min <= max2) {
        this._spherical.theta = Math.max(min, Math.min(max2, this._spherical.theta));
      } else {
        this._spherical.theta = this._spherical.theta > (min + max2) / 2 ? Math.max(min, this._spherical.theta) : Math.min(max2, this._spherical.theta);
      }
    }
    this._spherical.phi = Math.max(this.minPolarAngle, Math.min(this.maxPolarAngle, this._spherical.phi));
    this._spherical.makeSafe();
    if (this.enableDamping === true) {
      this.target.addScaledVector(this._panOffset, this.dampingFactor);
    } else {
      this.target.add(this._panOffset);
    }
    this.target.sub(this.cursor);
    this.target.clampLength(this.minTargetRadius, this.maxTargetRadius);
    this.target.add(this.cursor);
    let zoomChanged = false;
    if (this.zoomToCursor && this._performCursorZoom || this.object.isOrthographicCamera) {
      this._spherical.radius = this._clampDistance(this._spherical.radius);
    } else {
      const prevRadius = this._spherical.radius;
      this._spherical.radius = this._clampDistance(this._spherical.radius * this._scale);
      zoomChanged = prevRadius != this._spherical.radius;
    }
    _v.setFromSpherical(this._spherical);
    _v.applyQuaternion(this._quatInverse);
    position.copy(this.target).add(_v);
    this.object.lookAt(this.target);
    if (this.enableDamping === true) {
      this._sphericalDelta.theta *= 1 - this.dampingFactor;
      this._sphericalDelta.phi *= 1 - this.dampingFactor;
      this._panOffset.multiplyScalar(1 - this.dampingFactor);
    } else {
      this._sphericalDelta.set(0, 0, 0);
      this._panOffset.set(0, 0, 0);
    }
    if (this.zoomToCursor && this._performCursorZoom) {
      let newRadius = null;
      if (this.object.isPerspectiveCamera) {
        const prevRadius = _v.length();
        newRadius = this._clampDistance(prevRadius * this._scale);
        const radiusDelta = prevRadius - newRadius;
        this.object.position.addScaledVector(this._dollyDirection, radiusDelta);
        this.object.updateMatrixWorld();
        zoomChanged = !!radiusDelta;
      } else if (this.object.isOrthographicCamera) {
        const mouseBefore = new Vector3(this._mouse.x, this._mouse.y, 0);
        mouseBefore.unproject(this.object);
        const prevZoom = this.object.zoom;
        this.object.zoom = Math.max(this.minZoom, Math.min(this.maxZoom, this.object.zoom / this._scale));
        this.object.updateProjectionMatrix();
        zoomChanged = prevZoom !== this.object.zoom;
        const mouseAfter = new Vector3(this._mouse.x, this._mouse.y, 0);
        mouseAfter.unproject(this.object);
        this.object.position.sub(mouseAfter).add(mouseBefore);
        this.object.updateMatrixWorld();
        newRadius = _v.length();
      } else {
        console.warn("WARNING: OrbitControls.js encountered an unknown camera type - zoom to cursor disabled.");
        this.zoomToCursor = false;
      }
      if (newRadius !== null) {
        if (this.screenSpacePanning) {
          this.target.set(0, 0, -1).transformDirection(this.object.matrix).multiplyScalar(newRadius).add(this.object.position);
        } else {
          _ray.origin.copy(this.object.position);
          _ray.direction.set(0, 0, -1).transformDirection(this.object.matrix);
          if (Math.abs(this.object.up.dot(_ray.direction)) < _TILT_LIMIT) {
            this.object.lookAt(this.target);
          } else {
            _plane.setFromNormalAndCoplanarPoint(this.object.up, this.target);
            _ray.intersectPlane(_plane, this.target);
          }
        }
      }
    } else if (this.object.isOrthographicCamera) {
      const prevZoom = this.object.zoom;
      this.object.zoom = Math.max(this.minZoom, Math.min(this.maxZoom, this.object.zoom / this._scale));
      if (prevZoom !== this.object.zoom) {
        this.object.updateProjectionMatrix();
        zoomChanged = true;
      }
    }
    this._scale = 1;
    this._performCursorZoom = false;
    if (zoomChanged || this._lastPosition.distanceToSquared(this.object.position) > _EPS || 8 * (1 - this._lastQuaternion.dot(this.object.quaternion)) > _EPS || this._lastTargetPosition.distanceToSquared(this.target) > _EPS) {
      this.dispatchEvent(_changeEvent);
      this._lastPosition.copy(this.object.position);
      this._lastQuaternion.copy(this.object.quaternion);
      this._lastTargetPosition.copy(this.target);
      return true;
    }
    return false;
  }
  _getAutoRotationAngle(deltaTime) {
    if (deltaTime !== null) {
      return _twoPI / 60 * this.autoRotateSpeed * deltaTime;
    } else {
      return _twoPI / 60 / 60 * this.autoRotateSpeed;
    }
  }
  _getZoomScale(delta) {
    const normalizedDelta = Math.abs(delta * 0.01);
    return Math.pow(0.95, this.zoomSpeed * normalizedDelta);
  }
  _rotateLeft(angle) {
    this._sphericalDelta.theta -= angle;
  }
  _rotateUp(angle) {
    this._sphericalDelta.phi -= angle;
  }
  _panLeft(distance, objectMatrix) {
    _v.setFromMatrixColumn(objectMatrix, 0);
    _v.multiplyScalar(-distance);
    this._panOffset.add(_v);
  }
  _panUp(distance, objectMatrix) {
    if (this.screenSpacePanning === true) {
      _v.setFromMatrixColumn(objectMatrix, 1);
    } else {
      _v.setFromMatrixColumn(objectMatrix, 0);
      _v.crossVectors(this.object.up, _v);
    }
    _v.multiplyScalar(distance);
    this._panOffset.add(_v);
  }
  // deltaX and deltaY are in pixels; right and down are positive
  _pan(deltaX, deltaY) {
    const element = this.domElement;
    if (this.object.isPerspectiveCamera) {
      const position = this.object.position;
      _v.copy(position).sub(this.target);
      let targetDistance = _v.length();
      targetDistance *= Math.tan(this.object.fov / 2 * Math.PI / 180);
      this._panLeft(2 * deltaX * targetDistance / element.clientHeight, this.object.matrix);
      this._panUp(2 * deltaY * targetDistance / element.clientHeight, this.object.matrix);
    } else if (this.object.isOrthographicCamera) {
      this._panLeft(deltaX * (this.object.right - this.object.left) / this.object.zoom / element.clientWidth, this.object.matrix);
      this._panUp(deltaY * (this.object.top - this.object.bottom) / this.object.zoom / element.clientHeight, this.object.matrix);
    } else {
      console.warn("WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.");
      this.enablePan = false;
    }
  }
  _dollyOut(dollyScale) {
    if (this.object.isPerspectiveCamera || this.object.isOrthographicCamera) {
      this._scale /= dollyScale;
    } else {
      console.warn("WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.");
      this.enableZoom = false;
    }
  }
  _dollyIn(dollyScale) {
    if (this.object.isPerspectiveCamera || this.object.isOrthographicCamera) {
      this._scale *= dollyScale;
    } else {
      console.warn("WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.");
      this.enableZoom = false;
    }
  }
  _updateZoomParameters(x, y) {
    if (!this.zoomToCursor) {
      return;
    }
    this._performCursorZoom = true;
    const rect = this.domElement.getBoundingClientRect();
    const dx = x - rect.left;
    const dy = y - rect.top;
    const w = rect.width;
    const h = rect.height;
    this._mouse.x = dx / w * 2 - 1;
    this._mouse.y = -(dy / h) * 2 + 1;
    this._dollyDirection.set(this._mouse.x, this._mouse.y, 1).unproject(this.object).sub(this.object.position).normalize();
  }
  _clampDistance(dist) {
    return Math.max(this.minDistance, Math.min(this.maxDistance, dist));
  }
  //
  // event callbacks - update the object state
  //
  _handleMouseDownRotate(event) {
    this._rotateStart.set(event.clientX, event.clientY);
  }
  _handleMouseDownDolly(event) {
    this._updateZoomParameters(event.clientX, event.clientX);
    this._dollyStart.set(event.clientX, event.clientY);
  }
  _handleMouseDownPan(event) {
    this._panStart.set(event.clientX, event.clientY);
  }
  _handleMouseMoveRotate(event) {
    this._rotateEnd.set(event.clientX, event.clientY);
    this._rotateDelta.subVectors(this._rotateEnd, this._rotateStart).multiplyScalar(this.rotateSpeed);
    const element = this.domElement;
    this._rotateLeft(_twoPI * this._rotateDelta.x / element.clientHeight);
    this._rotateUp(_twoPI * this._rotateDelta.y / element.clientHeight);
    this._rotateStart.copy(this._rotateEnd);
    this.update();
  }
  _handleMouseMoveDolly(event) {
    this._dollyEnd.set(event.clientX, event.clientY);
    this._dollyDelta.subVectors(this._dollyEnd, this._dollyStart);
    if (this._dollyDelta.y > 0) {
      this._dollyOut(this._getZoomScale(this._dollyDelta.y));
    } else if (this._dollyDelta.y < 0) {
      this._dollyIn(this._getZoomScale(this._dollyDelta.y));
    }
    this._dollyStart.copy(this._dollyEnd);
    this.update();
  }
  _handleMouseMovePan(event) {
    this._panEnd.set(event.clientX, event.clientY);
    this._panDelta.subVectors(this._panEnd, this._panStart).multiplyScalar(this.panSpeed);
    this._pan(this._panDelta.x, this._panDelta.y);
    this._panStart.copy(this._panEnd);
    this.update();
  }
  _handleMouseWheel(event) {
    this._updateZoomParameters(event.clientX, event.clientY);
    if (event.deltaY < 0) {
      this._dollyIn(this._getZoomScale(event.deltaY));
    } else if (event.deltaY > 0) {
      this._dollyOut(this._getZoomScale(event.deltaY));
    }
    this.update();
  }
  _handleKeyDown(event) {
    let needsUpdate = false;
    switch (event.code) {
      case this.keys.UP:
        if (event.ctrlKey || event.metaKey || event.shiftKey) {
          this._rotateUp(_twoPI * this.rotateSpeed / this.domElement.clientHeight);
        } else {
          this._pan(0, this.keyPanSpeed);
        }
        needsUpdate = true;
        break;
      case this.keys.BOTTOM:
        if (event.ctrlKey || event.metaKey || event.shiftKey) {
          this._rotateUp(-_twoPI * this.rotateSpeed / this.domElement.clientHeight);
        } else {
          this._pan(0, -this.keyPanSpeed);
        }
        needsUpdate = true;
        break;
      case this.keys.LEFT:
        if (event.ctrlKey || event.metaKey || event.shiftKey) {
          this._rotateLeft(_twoPI * this.rotateSpeed / this.domElement.clientHeight);
        } else {
          this._pan(this.keyPanSpeed, 0);
        }
        needsUpdate = true;
        break;
      case this.keys.RIGHT:
        if (event.ctrlKey || event.metaKey || event.shiftKey) {
          this._rotateLeft(-_twoPI * this.rotateSpeed / this.domElement.clientHeight);
        } else {
          this._pan(-this.keyPanSpeed, 0);
        }
        needsUpdate = true;
        break;
    }
    if (needsUpdate) {
      event.preventDefault();
      this.update();
    }
  }
  _handleTouchStartRotate(event) {
    if (this._pointers.length === 1) {
      this._rotateStart.set(event.pageX, event.pageY);
    } else {
      const position = this._getSecondPointerPosition(event);
      const x = 0.5 * (event.pageX + position.x);
      const y = 0.5 * (event.pageY + position.y);
      this._rotateStart.set(x, y);
    }
  }
  _handleTouchStartPan(event) {
    if (this._pointers.length === 1) {
      this._panStart.set(event.pageX, event.pageY);
    } else {
      const position = this._getSecondPointerPosition(event);
      const x = 0.5 * (event.pageX + position.x);
      const y = 0.5 * (event.pageY + position.y);
      this._panStart.set(x, y);
    }
  }
  _handleTouchStartDolly(event) {
    const position = this._getSecondPointerPosition(event);
    const dx = event.pageX - position.x;
    const dy = event.pageY - position.y;
    const distance = Math.sqrt(dx * dx + dy * dy);
    this._dollyStart.set(0, distance);
  }
  _handleTouchStartDollyPan(event) {
    if (this.enableZoom) this._handleTouchStartDolly(event);
    if (this.enablePan) this._handleTouchStartPan(event);
  }
  _handleTouchStartDollyRotate(event) {
    if (this.enableZoom) this._handleTouchStartDolly(event);
    if (this.enableRotate) this._handleTouchStartRotate(event);
  }
  _handleTouchMoveRotate(event) {
    if (this._pointers.length == 1) {
      this._rotateEnd.set(event.pageX, event.pageY);
    } else {
      const position = this._getSecondPointerPosition(event);
      const x = 0.5 * (event.pageX + position.x);
      const y = 0.5 * (event.pageY + position.y);
      this._rotateEnd.set(x, y);
    }
    this._rotateDelta.subVectors(this._rotateEnd, this._rotateStart).multiplyScalar(this.rotateSpeed);
    const element = this.domElement;
    this._rotateLeft(_twoPI * this._rotateDelta.x / element.clientHeight);
    this._rotateUp(_twoPI * this._rotateDelta.y / element.clientHeight);
    this._rotateStart.copy(this._rotateEnd);
  }
  _handleTouchMovePan(event) {
    if (this._pointers.length === 1) {
      this._panEnd.set(event.pageX, event.pageY);
    } else {
      const position = this._getSecondPointerPosition(event);
      const x = 0.5 * (event.pageX + position.x);
      const y = 0.5 * (event.pageY + position.y);
      this._panEnd.set(x, y);
    }
    this._panDelta.subVectors(this._panEnd, this._panStart).multiplyScalar(this.panSpeed);
    this._pan(this._panDelta.x, this._panDelta.y);
    this._panStart.copy(this._panEnd);
  }
  _handleTouchMoveDolly(event) {
    const position = this._getSecondPointerPosition(event);
    const dx = event.pageX - position.x;
    const dy = event.pageY - position.y;
    const distance = Math.sqrt(dx * dx + dy * dy);
    this._dollyEnd.set(0, distance);
    this._dollyDelta.set(0, Math.pow(this._dollyEnd.y / this._dollyStart.y, this.zoomSpeed));
    this._dollyOut(this._dollyDelta.y);
    this._dollyStart.copy(this._dollyEnd);
    const centerX = (event.pageX + position.x) * 0.5;
    const centerY = (event.pageY + position.y) * 0.5;
    this._updateZoomParameters(centerX, centerY);
  }
  _handleTouchMoveDollyPan(event) {
    if (this.enableZoom) this._handleTouchMoveDolly(event);
    if (this.enablePan) this._handleTouchMovePan(event);
  }
  _handleTouchMoveDollyRotate(event) {
    if (this.enableZoom) this._handleTouchMoveDolly(event);
    if (this.enableRotate) this._handleTouchMoveRotate(event);
  }
  // pointers
  _addPointer(event) {
    this._pointers.push(event.pointerId);
  }
  _removePointer(event) {
    delete this._pointerPositions[event.pointerId];
    for (let i = 0; i < this._pointers.length; i++) {
      if (this._pointers[i] == event.pointerId) {
        this._pointers.splice(i, 1);
        return;
      }
    }
  }
  _isTrackingPointer(event) {
    for (let i = 0; i < this._pointers.length; i++) {
      if (this._pointers[i] == event.pointerId) return true;
    }
    return false;
  }
  _trackPointer(event) {
    let position = this._pointerPositions[event.pointerId];
    if (position === void 0) {
      position = new Vector2();
      this._pointerPositions[event.pointerId] = position;
    }
    position.set(event.pageX, event.pageY);
  }
  _getSecondPointerPosition(event) {
    const pointerId = event.pointerId === this._pointers[0] ? this._pointers[1] : this._pointers[0];
    return this._pointerPositions[pointerId];
  }
  //
  _customWheelEvent(event) {
    const mode = event.deltaMode;
    const newEvent = {
      clientX: event.clientX,
      clientY: event.clientY,
      deltaY: event.deltaY
    };
    switch (mode) {
      case 1:
        newEvent.deltaY *= 16;
        break;
      case 2:
        newEvent.deltaY *= 100;
        break;
    }
    if (event.ctrlKey && !this._controlActive) {
      newEvent.deltaY *= 10;
    }
    return newEvent;
  }
}
function onPointerDown(event) {
  if (this.enabled === false) return;
  if (this._pointers.length === 0) {
    this.domElement.setPointerCapture(event.pointerId);
    this.domElement.addEventListener("pointermove", this._onPointerMove);
    this.domElement.addEventListener("pointerup", this._onPointerUp);
  }
  if (this._isTrackingPointer(event)) return;
  this._addPointer(event);
  if (event.pointerType === "touch") {
    this._onTouchStart(event);
  } else {
    this._onMouseDown(event);
  }
}
__name(onPointerDown, "onPointerDown");
function onPointerMove(event) {
  if (this.enabled === false) return;
  if (event.pointerType === "touch") {
    this._onTouchMove(event);
  } else {
    this._onMouseMove(event);
  }
}
__name(onPointerMove, "onPointerMove");
function onPointerUp(event) {
  this._removePointer(event);
  switch (this._pointers.length) {
    case 0:
      this.domElement.releasePointerCapture(event.pointerId);
      this.domElement.removeEventListener("pointermove", this._onPointerMove);
      this.domElement.removeEventListener("pointerup", this._onPointerUp);
      this.dispatchEvent(_endEvent);
      this.state = _STATE.NONE;
      break;
    case 1:
      const pointerId = this._pointers[0];
      const position = this._pointerPositions[pointerId];
      this._onTouchStart({ pointerId, pageX: position.x, pageY: position.y });
      break;
  }
}
__name(onPointerUp, "onPointerUp");
function onMouseDown(event) {
  let mouseAction;
  switch (event.button) {
    case 0:
      mouseAction = this.mouseButtons.LEFT;
      break;
    case 1:
      mouseAction = this.mouseButtons.MIDDLE;
      break;
    case 2:
      mouseAction = this.mouseButtons.RIGHT;
      break;
    default:
      mouseAction = -1;
  }
  switch (mouseAction) {
    case MOUSE.DOLLY:
      if (this.enableZoom === false) return;
      this._handleMouseDownDolly(event);
      this.state = _STATE.DOLLY;
      break;
    case MOUSE.ROTATE:
      if (event.ctrlKey || event.metaKey || event.shiftKey) {
        if (this.enablePan === false) return;
        this._handleMouseDownPan(event);
        this.state = _STATE.PAN;
      } else {
        if (this.enableRotate === false) return;
        this._handleMouseDownRotate(event);
        this.state = _STATE.ROTATE;
      }
      break;
    case MOUSE.PAN:
      if (event.ctrlKey || event.metaKey || event.shiftKey) {
        if (this.enableRotate === false) return;
        this._handleMouseDownRotate(event);
        this.state = _STATE.ROTATE;
      } else {
        if (this.enablePan === false) return;
        this._handleMouseDownPan(event);
        this.state = _STATE.PAN;
      }
      break;
    default:
      this.state = _STATE.NONE;
  }
  if (this.state !== _STATE.NONE) {
    this.dispatchEvent(_startEvent);
  }
}
__name(onMouseDown, "onMouseDown");
function onMouseMove(event) {
  switch (this.state) {
    case _STATE.ROTATE:
      if (this.enableRotate === false) return;
      this._handleMouseMoveRotate(event);
      break;
    case _STATE.DOLLY:
      if (this.enableZoom === false) return;
      this._handleMouseMoveDolly(event);
      break;
    case _STATE.PAN:
      if (this.enablePan === false) return;
      this._handleMouseMovePan(event);
      break;
  }
}
__name(onMouseMove, "onMouseMove");
function onMouseWheel(event) {
  if (this.enabled === false || this.enableZoom === false || this.state !== _STATE.NONE) return;
  event.preventDefault();
  this.dispatchEvent(_startEvent);
  this._handleMouseWheel(this._customWheelEvent(event));
  this.dispatchEvent(_endEvent);
}
__name(onMouseWheel, "onMouseWheel");
function onKeyDown(event) {
  if (this.enabled === false || this.enablePan === false) return;
  this._handleKeyDown(event);
}
__name(onKeyDown, "onKeyDown");
function onTouchStart(event) {
  this._trackPointer(event);
  switch (this._pointers.length) {
    case 1:
      switch (this.touches.ONE) {
        case TOUCH.ROTATE:
          if (this.enableRotate === false) return;
          this._handleTouchStartRotate(event);
          this.state = _STATE.TOUCH_ROTATE;
          break;
        case TOUCH.PAN:
          if (this.enablePan === false) return;
          this._handleTouchStartPan(event);
          this.state = _STATE.TOUCH_PAN;
          break;
        default:
          this.state = _STATE.NONE;
      }
      break;
    case 2:
      switch (this.touches.TWO) {
        case TOUCH.DOLLY_PAN:
          if (this.enableZoom === false && this.enablePan === false) return;
          this._handleTouchStartDollyPan(event);
          this.state = _STATE.TOUCH_DOLLY_PAN;
          break;
        case TOUCH.DOLLY_ROTATE:
          if (this.enableZoom === false && this.enableRotate === false) return;
          this._handleTouchStartDollyRotate(event);
          this.state = _STATE.TOUCH_DOLLY_ROTATE;
          break;
        default:
          this.state = _STATE.NONE;
      }
      break;
    default:
      this.state = _STATE.NONE;
  }
  if (this.state !== _STATE.NONE) {
    this.dispatchEvent(_startEvent);
  }
}
__name(onTouchStart, "onTouchStart");
function onTouchMove(event) {
  this._trackPointer(event);
  switch (this.state) {
    case _STATE.TOUCH_ROTATE:
      if (this.enableRotate === false) return;
      this._handleTouchMoveRotate(event);
      this.update();
      break;
    case _STATE.TOUCH_PAN:
      if (this.enablePan === false) return;
      this._handleTouchMovePan(event);
      this.update();
      break;
    case _STATE.TOUCH_DOLLY_PAN:
      if (this.enableZoom === false && this.enablePan === false) return;
      this._handleTouchMoveDollyPan(event);
      this.update();
      break;
    case _STATE.TOUCH_DOLLY_ROTATE:
      if (this.enableZoom === false && this.enableRotate === false) return;
      this._handleTouchMoveDollyRotate(event);
      this.update();
      break;
    default:
      this.state = _STATE.NONE;
  }
}
__name(onTouchMove, "onTouchMove");
function onContextMenu(event) {
  if (this.enabled === false) return;
  event.preventDefault();
}
__name(onContextMenu, "onContextMenu");
function interceptControlDown(event) {
  if (event.key === "Control") {
    this._controlActive = true;
    const document2 = this.domElement.getRootNode();
    document2.addEventListener("keyup", this._interceptControlUp, { passive: true, capture: true });
  }
}
__name(interceptControlDown, "interceptControlDown");
function interceptControlUp(event) {
  if (event.key === "Control") {
    this._controlActive = false;
    const document2 = this.domElement.getRootNode();
    document2.removeEventListener("keyup", this._interceptControlUp, { passive: true, capture: true });
  }
}
__name(interceptControlUp, "interceptControlUp");
class ViewHelper extends Object3D {
  static {
    __name(this, "ViewHelper");
  }
  constructor(camera, domElement) {
    super();
    this.isViewHelper = true;
    this.animating = false;
    this.center = new Vector3();
    const color1 = new Color("#ff4466");
    const color2 = new Color("#88ff44");
    const color3 = new Color("#4488ff");
    const color4 = new Color("#000000");
    const options = {};
    const interactiveObjects = [];
    const raycaster = new Raycaster();
    const mouse = new Vector2();
    const dummy = new Object3D();
    const orthoCamera = new OrthographicCamera(-2, 2, 2, -2, 0, 4);
    orthoCamera.position.set(0, 0, 2);
    const geometry = new CylinderGeometry(0.04, 0.04, 0.8, 5).rotateZ(-Math.PI / 2).translate(0.4, 0, 0);
    const xAxis = new Mesh(geometry, getAxisMaterial(color1));
    const yAxis = new Mesh(geometry, getAxisMaterial(color2));
    const zAxis = new Mesh(geometry, getAxisMaterial(color3));
    yAxis.rotation.z = Math.PI / 2;
    zAxis.rotation.y = -Math.PI / 2;
    this.add(xAxis);
    this.add(zAxis);
    this.add(yAxis);
    const spriteMaterial1 = getSpriteMaterial(color1);
    const spriteMaterial2 = getSpriteMaterial(color2);
    const spriteMaterial3 = getSpriteMaterial(color3);
    const spriteMaterial4 = getSpriteMaterial(color4);
    const posXAxisHelper = new Sprite(spriteMaterial1);
    const posYAxisHelper = new Sprite(spriteMaterial2);
    const posZAxisHelper = new Sprite(spriteMaterial3);
    const negXAxisHelper = new Sprite(spriteMaterial4);
    const negYAxisHelper = new Sprite(spriteMaterial4);
    const negZAxisHelper = new Sprite(spriteMaterial4);
    posXAxisHelper.position.x = 1;
    posYAxisHelper.position.y = 1;
    posZAxisHelper.position.z = 1;
    negXAxisHelper.position.x = -1;
    negYAxisHelper.position.y = -1;
    negZAxisHelper.position.z = -1;
    negXAxisHelper.material.opacity = 0.2;
    negYAxisHelper.material.opacity = 0.2;
    negZAxisHelper.material.opacity = 0.2;
    posXAxisHelper.userData.type = "posX";
    posYAxisHelper.userData.type = "posY";
    posZAxisHelper.userData.type = "posZ";
    negXAxisHelper.userData.type = "negX";
    negYAxisHelper.userData.type = "negY";
    negZAxisHelper.userData.type = "negZ";
    this.add(posXAxisHelper);
    this.add(posYAxisHelper);
    this.add(posZAxisHelper);
    this.add(negXAxisHelper);
    this.add(negYAxisHelper);
    this.add(negZAxisHelper);
    interactiveObjects.push(posXAxisHelper);
    interactiveObjects.push(posYAxisHelper);
    interactiveObjects.push(posZAxisHelper);
    interactiveObjects.push(negXAxisHelper);
    interactiveObjects.push(negYAxisHelper);
    interactiveObjects.push(negZAxisHelper);
    const point = new Vector3();
    const dim = 128;
    const turnRate = 2 * Math.PI;
    this.render = function(renderer) {
      this.quaternion.copy(camera.quaternion).invert();
      this.updateMatrixWorld();
      point.set(0, 0, 1);
      point.applyQuaternion(camera.quaternion);
      const x = domElement.offsetWidth - dim;
      renderer.clearDepth();
      renderer.getViewport(viewport);
      renderer.setViewport(x, 0, dim, dim);
      renderer.render(this, orthoCamera);
      renderer.setViewport(viewport.x, viewport.y, viewport.z, viewport.w);
    };
    const targetPosition = new Vector3();
    const targetQuaternion = new Quaternion();
    const q1 = new Quaternion();
    const q2 = new Quaternion();
    const viewport = new Vector4();
    let radius = 0;
    this.handleClick = function(event) {
      if (this.animating === true) return false;
      const rect = domElement.getBoundingClientRect();
      const offsetX = rect.left + (domElement.offsetWidth - dim);
      const offsetY = rect.top + (domElement.offsetHeight - dim);
      mouse.x = (event.clientX - offsetX) / (rect.right - offsetX) * 2 - 1;
      mouse.y = -((event.clientY - offsetY) / (rect.bottom - offsetY)) * 2 + 1;
      raycaster.setFromCamera(mouse, orthoCamera);
      const intersects2 = raycaster.intersectObjects(interactiveObjects);
      if (intersects2.length > 0) {
        const intersection = intersects2[0];
        const object = intersection.object;
        prepareAnimationData(object, this.center);
        this.animating = true;
        return true;
      } else {
        return false;
      }
    };
    this.setLabels = function(labelX, labelY, labelZ) {
      options.labelX = labelX;
      options.labelY = labelY;
      options.labelZ = labelZ;
      updateLabels();
    };
    this.setLabelStyle = function(font, color, radius2) {
      options.font = font;
      options.color = color;
      options.radius = radius2;
      updateLabels();
    };
    this.update = function(delta) {
      const step = delta * turnRate;
      q1.rotateTowards(q2, step);
      camera.position.set(0, 0, 1).applyQuaternion(q1).multiplyScalar(radius).add(this.center);
      camera.quaternion.rotateTowards(targetQuaternion, step);
      if (q1.angleTo(q2) === 0) {
        this.animating = false;
      }
    };
    this.dispose = function() {
      geometry.dispose();
      xAxis.material.dispose();
      yAxis.material.dispose();
      zAxis.material.dispose();
      posXAxisHelper.material.map.dispose();
      posYAxisHelper.material.map.dispose();
      posZAxisHelper.material.map.dispose();
      negXAxisHelper.material.map.dispose();
      negYAxisHelper.material.map.dispose();
      negZAxisHelper.material.map.dispose();
      posXAxisHelper.material.dispose();
      posYAxisHelper.material.dispose();
      posZAxisHelper.material.dispose();
      negXAxisHelper.material.dispose();
      negYAxisHelper.material.dispose();
      negZAxisHelper.material.dispose();
    };
    function prepareAnimationData(object, focusPoint) {
      switch (object.userData.type) {
        case "posX":
          targetPosition.set(1, 0, 0);
          targetQuaternion.setFromEuler(new Euler(0, Math.PI * 0.5, 0));
          break;
        case "posY":
          targetPosition.set(0, 1, 0);
          targetQuaternion.setFromEuler(new Euler(-Math.PI * 0.5, 0, 0));
          break;
        case "posZ":
          targetPosition.set(0, 0, 1);
          targetQuaternion.setFromEuler(new Euler());
          break;
        case "negX":
          targetPosition.set(-1, 0, 0);
          targetQuaternion.setFromEuler(new Euler(0, -Math.PI * 0.5, 0));
          break;
        case "negY":
          targetPosition.set(0, -1, 0);
          targetQuaternion.setFromEuler(new Euler(Math.PI * 0.5, 0, 0));
          break;
        case "negZ":
          targetPosition.set(0, 0, -1);
          targetQuaternion.setFromEuler(new Euler(0, Math.PI, 0));
          break;
        default:
          console.error("ViewHelper: Invalid axis.");
      }
      radius = camera.position.distanceTo(focusPoint);
      targetPosition.multiplyScalar(radius).add(focusPoint);
      dummy.position.copy(focusPoint);
      dummy.lookAt(camera.position);
      q1.copy(dummy.quaternion);
      dummy.lookAt(targetPosition);
      q2.copy(dummy.quaternion);
    }
    __name(prepareAnimationData, "prepareAnimationData");
    function getAxisMaterial(color) {
      return new MeshBasicMaterial({ color, toneMapped: false });
    }
    __name(getAxisMaterial, "getAxisMaterial");
    function getSpriteMaterial(color, text) {
      const { font = "24px Arial", color: labelColor = "#000000", radius: radius2 = 14 } = options;
      const canvas = document.createElement("canvas");
      canvas.width = 64;
      canvas.height = 64;
      const context = canvas.getContext("2d");
      context.beginPath();
      context.arc(32, 32, radius2, 0, 2 * Math.PI);
      context.closePath();
      context.fillStyle = color.getStyle();
      context.fill();
      if (text) {
        context.font = font;
        context.textAlign = "center";
        context.fillStyle = labelColor;
        context.fillText(text, 32, 41);
      }
      const texture = new CanvasTexture(canvas);
      texture.colorSpace = SRGBColorSpace;
      return new SpriteMaterial({ map: texture, toneMapped: false });
    }
    __name(getSpriteMaterial, "getSpriteMaterial");
    function updateLabels() {
      posXAxisHelper.material.map.dispose();
      posYAxisHelper.material.map.dispose();
      posZAxisHelper.material.map.dispose();
      posXAxisHelper.material.dispose();
      posYAxisHelper.material.dispose();
      posZAxisHelper.material.dispose();
      posXAxisHelper.material = getSpriteMaterial(color1, options.labelX);
      posYAxisHelper.material = getSpriteMaterial(color2, options.labelY);
      posZAxisHelper.material = getSpriteMaterial(color3, options.labelZ);
    }
    __name(updateLabels, "updateLabels");
  }
}
var u8$1 = Uint8Array, u16$1 = Uint16Array, i32$1 = Int32Array;
var fleb$1 = new u8$1([
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  1,
  1,
  1,
  1,
  2,
  2,
  2,
  2,
  3,
  3,
  3,
  3,
  4,
  4,
  4,
  4,
  5,
  5,
  5,
  5,
  0,
  /* unused */
  0,
  0,
  /* impossible */
  0
]);
var fdeb$1 = new u8$1([
  0,
  0,
  0,
  0,
  1,
  1,
  2,
  2,
  3,
  3,
  4,
  4,
  5,
  5,
  6,
  6,
  7,
  7,
  8,
  8,
  9,
  9,
  10,
  10,
  11,
  11,
  12,
  12,
  13,
  13,
  /* unused */
  0,
  0
]);
var clim$1 = new u8$1([16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15]);
var freb$1 = /* @__PURE__ */ __name(function(eb, start) {
  var b = new u16$1(31);
  for (var i = 0; i < 31; ++i) {
    b[i] = start += 1 << eb[i - 1];
  }
  var r = new i32$1(b[30]);
  for (var i = 1; i < 30; ++i) {
    for (var j = b[i]; j < b[i + 1]; ++j) {
      r[j] = j - b[i] << 5 | i;
    }
  }
  return { b, r };
}, "freb$1");
var _a$1 = freb$1(fleb$1, 2), fl$1 = _a$1.b, revfl$1 = _a$1.r;
fl$1[28] = 258, revfl$1[258] = 28;
var _b$1 = freb$1(fdeb$1, 0), fd$1 = _b$1.b;
var rev$1 = new u16$1(32768);
for (var i$1 = 0; i$1 < 32768; ++i$1) {
  var x$1 = (i$1 & 43690) >> 1 | (i$1 & 21845) << 1;
  x$1 = (x$1 & 52428) >> 2 | (x$1 & 13107) << 2;
  x$1 = (x$1 & 61680) >> 4 | (x$1 & 3855) << 4;
  rev$1[i$1] = ((x$1 & 65280) >> 8 | (x$1 & 255) << 8) >> 1;
}
var hMap$1 = /* @__PURE__ */ __name((function(cd, mb, r) {
  var s = cd.length;
  var i = 0;
  var l = new u16$1(mb);
  for (; i < s; ++i) {
    if (cd[i])
      ++l[cd[i] - 1];
  }
  var le = new u16$1(mb);
  for (i = 1; i < mb; ++i) {
    le[i] = le[i - 1] + l[i - 1] << 1;
  }
  var co;
  if (r) {
    co = new u16$1(1 << mb);
    var rvb = 15 - mb;
    for (i = 0; i < s; ++i) {
      if (cd[i]) {
        var sv = i << 4 | cd[i];
        var r_1 = mb - cd[i];
        var v = le[cd[i] - 1]++ << r_1;
        for (var m = v | (1 << r_1) - 1; v <= m; ++v) {
          co[rev$1[v] >> rvb] = sv;
        }
      }
    }
  } else {
    co = new u16$1(s);
    for (i = 0; i < s; ++i) {
      if (cd[i]) {
        co[i] = rev$1[le[cd[i] - 1]++] >> 15 - cd[i];
      }
    }
  }
  return co;
}), "hMap$1");
var flt$1 = new u8$1(288);
for (var i$1 = 0; i$1 < 144; ++i$1)
  flt$1[i$1] = 8;
for (var i$1 = 144; i$1 < 256; ++i$1)
  flt$1[i$1] = 9;
for (var i$1 = 256; i$1 < 280; ++i$1)
  flt$1[i$1] = 7;
for (var i$1 = 280; i$1 < 288; ++i$1)
  flt$1[i$1] = 8;
var fdt$1 = new u8$1(32);
for (var i$1 = 0; i$1 < 32; ++i$1)
  fdt$1[i$1] = 5;
var flrm$1 = /* @__PURE__ */ hMap$1(flt$1, 9, 1);
var fdrm$1 = /* @__PURE__ */ hMap$1(fdt$1, 5, 1);
var max = /* @__PURE__ */ __name(function(a) {
  var m = a[0];
  for (var i = 1; i < a.length; ++i) {
    if (a[i] > m)
      m = a[i];
  }
  return m;
}, "max");
var bits$1 = /* @__PURE__ */ __name(function(d, p, m) {
  var o = p / 8 | 0;
  return (d[o] | d[o + 1] << 8) >> (p & 7) & m;
}, "bits$1");
var bits16$1 = /* @__PURE__ */ __name(function(d, p) {
  var o = p / 8 | 0;
  return (d[o] | d[o + 1] << 8 | d[o + 2] << 16) >> (p & 7);
}, "bits16$1");
var shft$1 = /* @__PURE__ */ __name(function(p) {
  return (p + 7) / 8 | 0;
}, "shft$1");
var slc$1 = /* @__PURE__ */ __name(function(v, s, e) {
  if (e == null || e > v.length)
    e = v.length;
  return new u8$1(v.subarray(s, e));
}, "slc$1");
var ec$1 = [
  "unexpected EOF",
  "invalid block type",
  "invalid length/literal",
  "invalid distance",
  "stream finished",
  "no stream handler",
  ,
  "no callback",
  "invalid UTF-8 data",
  "extra field too long",
  "date not in range 1980-2099",
  "filename too long",
  "stream finishing",
  "invalid zip data"
  // determined by unknown compression method
];
var err$1 = /* @__PURE__ */ __name(function(ind, msg, nt) {
  var e = new Error(msg || ec$1[ind]);
  e.code = ind;
  if (Error.captureStackTrace)
    Error.captureStackTrace(e, err$1);
  if (!nt)
    throw e;
  return e;
}, "err$1");
var inflt$1 = /* @__PURE__ */ __name(function(dat, st, buf, dict) {
  var sl = dat.length, dl = 0;
  if (!sl || st.f && !st.l)
    return buf || new u8$1(0);
  var noBuf = !buf;
  var resize = noBuf || st.i != 2;
  var noSt = st.i;
  if (noBuf)
    buf = new u8$1(sl * 3);
  var cbuf = /* @__PURE__ */ __name(function(l2) {
    var bl = buf.length;
    if (l2 > bl) {
      var nbuf = new u8$1(Math.max(bl * 2, l2));
      nbuf.set(buf);
      buf = nbuf;
    }
  }, "cbuf");
  var final = st.f || 0, pos = st.p || 0, bt = st.b || 0, lm = st.l, dm = st.d, lbt = st.m, dbt = st.n;
  var tbts = sl * 8;
  do {
    if (!lm) {
      final = bits$1(dat, pos, 1);
      var type = bits$1(dat, pos + 1, 3);
      pos += 3;
      if (!type) {
        var s = shft$1(pos) + 4, l = dat[s - 4] | dat[s - 3] << 8, t = s + l;
        if (t > sl) {
          if (noSt)
            err$1(0);
          break;
        }
        if (resize)
          cbuf(bt + l);
        buf.set(dat.subarray(s, t), bt);
        st.b = bt += l, st.p = pos = t * 8, st.f = final;
        continue;
      } else if (type == 1)
        lm = flrm$1, dm = fdrm$1, lbt = 9, dbt = 5;
      else if (type == 2) {
        var hLit = bits$1(dat, pos, 31) + 257, hcLen = bits$1(dat, pos + 10, 15) + 4;
        var tl = hLit + bits$1(dat, pos + 5, 31) + 1;
        pos += 14;
        var ldt = new u8$1(tl);
        var clt = new u8$1(19);
        for (var i = 0; i < hcLen; ++i) {
          clt[clim$1[i]] = bits$1(dat, pos + i * 3, 7);
        }
        pos += hcLen * 3;
        var clb = max(clt), clbmsk = (1 << clb) - 1;
        var clm = hMap$1(clt, clb, 1);
        for (var i = 0; i < tl; ) {
          var r = clm[bits$1(dat, pos, clbmsk)];
          pos += r & 15;
          var s = r >> 4;
          if (s < 16) {
            ldt[i++] = s;
          } else {
            var c = 0, n = 0;
            if (s == 16)
              n = 3 + bits$1(dat, pos, 3), pos += 2, c = ldt[i - 1];
            else if (s == 17)
              n = 3 + bits$1(dat, pos, 7), pos += 3;
            else if (s == 18)
              n = 11 + bits$1(dat, pos, 127), pos += 7;
            while (n--)
              ldt[i++] = c;
          }
        }
        var lt = ldt.subarray(0, hLit), dt = ldt.subarray(hLit);
        lbt = max(lt);
        dbt = max(dt);
        lm = hMap$1(lt, lbt, 1);
        dm = hMap$1(dt, dbt, 1);
      } else
        err$1(1);
      if (pos > tbts) {
        if (noSt)
          err$1(0);
        break;
      }
    }
    if (resize)
      cbuf(bt + 131072);
    var lms = (1 << lbt) - 1, dms = (1 << dbt) - 1;
    var lpos = pos;
    for (; ; lpos = pos) {
      var c = lm[bits16$1(dat, pos) & lms], sym = c >> 4;
      pos += c & 15;
      if (pos > tbts) {
        if (noSt)
          err$1(0);
        break;
      }
      if (!c)
        err$1(2);
      if (sym < 256)
        buf[bt++] = sym;
      else if (sym == 256) {
        lpos = pos, lm = null;
        break;
      } else {
        var add2 = sym - 254;
        if (sym > 264) {
          var i = sym - 257, b = fleb$1[i];
          add2 = bits$1(dat, pos, (1 << b) - 1) + fl$1[i];
          pos += b;
        }
        var d = dm[bits16$1(dat, pos) & dms], dsym = d >> 4;
        if (!d)
          err$1(3);
        pos += d & 15;
        var dt = fd$1[dsym];
        if (dsym > 3) {
          var b = fdeb$1[dsym];
          dt += bits16$1(dat, pos) & (1 << b) - 1, pos += b;
        }
        if (pos > tbts) {
          if (noSt)
            err$1(0);
          break;
        }
        if (resize)
          cbuf(bt + 131072);
        var end = bt + add2;
        if (bt < dt) {
          var shift = dl - dt, dend = Math.min(dt, end);
          if (shift + bt < 0)
            err$1(3);
          for (; bt < dend; ++bt)
            buf[bt] = dict[shift + bt];
        }
        for (; bt < end; ++bt)
          buf[bt] = buf[bt - dt];
      }
    }
    st.l = lm, st.p = lpos, st.b = bt, st.f = final;
    if (lm)
      final = 1, st.m = lbt, st.d = dm, st.n = dbt;
  } while (!final);
  return bt != buf.length && noBuf ? slc$1(buf, 0, bt) : buf.subarray(0, bt);
}, "inflt$1");
var et$1 = /* @__PURE__ */ new u8$1(0);
var zls = /* @__PURE__ */ __name(function(d, dict) {
  if ((d[0] & 15) != 8 || d[0] >> 4 > 7 || (d[0] << 8 | d[1]) % 31)
    err$1(6, "invalid zlib data");
  if ((d[1] >> 5 & 1) == 1)
    err$1(6, "invalid zlib data: " + (d[1] & 32 ? "need" : "unexpected") + " dictionary");
  return (d[1] >> 3 & 4) + 2;
}, "zls");
function unzlibSync(data, opts) {
  return inflt$1(data.subarray(zls(data), -4), { i: 2 }, opts, opts);
}
__name(unzlibSync, "unzlibSync");
var td$1 = typeof TextDecoder != "undefined" && /* @__PURE__ */ new TextDecoder();
var tds$1 = 0;
try {
  td$1.decode(et$1, { stream: true });
  tds$1 = 1;
} catch (e) {
}
function findSpan(p, u, U) {
  const n = U.length - p - 1;
  if (u >= U[n]) {
    return n - 1;
  }
  if (u <= U[p]) {
    return p;
  }
  let low = p;
  let high = n;
  let mid = Math.floor((low + high) / 2);
  while (u < U[mid] || u >= U[mid + 1]) {
    if (u < U[mid]) {
      high = mid;
    } else {
      low = mid;
    }
    mid = Math.floor((low + high) / 2);
  }
  return mid;
}
__name(findSpan, "findSpan");
function calcBasisFunctions(span, u, p, U) {
  const N = [];
  const left = [];
  const right = [];
  N[0] = 1;
  for (let j = 1; j <= p; ++j) {
    left[j] = u - U[span + 1 - j];
    right[j] = U[span + j] - u;
    let saved = 0;
    for (let r = 0; r < j; ++r) {
      const rv = right[r + 1];
      const lv = left[j - r];
      const temp = N[r] / (rv + lv);
      N[r] = saved + rv * temp;
      saved = lv * temp;
    }
    N[j] = saved;
  }
  return N;
}
__name(calcBasisFunctions, "calcBasisFunctions");
function calcBSplinePoint(p, U, P, u) {
  const span = findSpan(p, u, U);
  const N = calcBasisFunctions(span, u, p, U);
  const C = new Vector4(0, 0, 0, 0);
  for (let j = 0; j <= p; ++j) {
    const point = P[span - p + j];
    const Nj = N[j];
    const wNj = point.w * Nj;
    C.x += point.x * wNj;
    C.y += point.y * wNj;
    C.z += point.z * wNj;
    C.w += point.w * Nj;
  }
  return C;
}
__name(calcBSplinePoint, "calcBSplinePoint");
function calcBasisFunctionDerivatives(span, u, p, n, U) {
  const zeroArr = [];
  for (let i = 0; i <= p; ++i)
    zeroArr[i] = 0;
  const ders = [];
  for (let i = 0; i <= n; ++i)
    ders[i] = zeroArr.slice(0);
  const ndu = [];
  for (let i = 0; i <= p; ++i)
    ndu[i] = zeroArr.slice(0);
  ndu[0][0] = 1;
  const left = zeroArr.slice(0);
  const right = zeroArr.slice(0);
  for (let j = 1; j <= p; ++j) {
    left[j] = u - U[span + 1 - j];
    right[j] = U[span + j] - u;
    let saved = 0;
    for (let r2 = 0; r2 < j; ++r2) {
      const rv = right[r2 + 1];
      const lv = left[j - r2];
      ndu[j][r2] = rv + lv;
      const temp = ndu[r2][j - 1] / ndu[j][r2];
      ndu[r2][j] = saved + rv * temp;
      saved = lv * temp;
    }
    ndu[j][j] = saved;
  }
  for (let j = 0; j <= p; ++j) {
    ders[0][j] = ndu[j][p];
  }
  for (let r2 = 0; r2 <= p; ++r2) {
    let s1 = 0;
    let s2 = 1;
    const a = [];
    for (let i = 0; i <= p; ++i) {
      a[i] = zeroArr.slice(0);
    }
    a[0][0] = 1;
    for (let k = 1; k <= n; ++k) {
      let d = 0;
      const rk = r2 - k;
      const pk = p - k;
      if (r2 >= k) {
        a[s2][0] = a[s1][0] / ndu[pk + 1][rk];
        d = a[s2][0] * ndu[rk][pk];
      }
      const j1 = rk >= -1 ? 1 : -rk;
      const j2 = r2 - 1 <= pk ? k - 1 : p - r2;
      for (let j3 = j1; j3 <= j2; ++j3) {
        a[s2][j3] = (a[s1][j3] - a[s1][j3 - 1]) / ndu[pk + 1][rk + j3];
        d += a[s2][j3] * ndu[rk + j3][pk];
      }
      if (r2 <= pk) {
        a[s2][k] = -a[s1][k - 1] / ndu[pk + 1][r2];
        d += a[s2][k] * ndu[r2][pk];
      }
      ders[k][r2] = d;
      const j = s1;
      s1 = s2;
      s2 = j;
    }
  }
  let r = p;
  for (let k = 1; k <= n; ++k) {
    for (let j = 0; j <= p; ++j) {
      ders[k][j] *= r;
    }
    r *= p - k;
  }
  return ders;
}
__name(calcBasisFunctionDerivatives, "calcBasisFunctionDerivatives");
function calcBSplineDerivatives(p, U, P, u, nd) {
  const du = nd < p ? nd : p;
  const CK = [];
  const span = findSpan(p, u, U);
  const nders = calcBasisFunctionDerivatives(span, u, p, du, U);
  const Pw = [];
  for (let i = 0; i < P.length; ++i) {
    const point = P[i].clone();
    const w = point.w;
    point.x *= w;
    point.y *= w;
    point.z *= w;
    Pw[i] = point;
  }
  for (let k = 0; k <= du; ++k) {
    const point = Pw[span - p].clone().multiplyScalar(nders[k][0]);
    for (let j = 1; j <= p; ++j) {
      point.add(Pw[span - p + j].clone().multiplyScalar(nders[k][j]));
    }
    CK[k] = point;
  }
  for (let k = du + 1; k <= nd + 1; ++k) {
    CK[k] = new Vector4(0, 0, 0);
  }
  return CK;
}
__name(calcBSplineDerivatives, "calcBSplineDerivatives");
function calcKoverI(k, i) {
  let nom = 1;
  for (let j = 2; j <= k; ++j) {
    nom *= j;
  }
  let denom = 1;
  for (let j = 2; j <= i; ++j) {
    denom *= j;
  }
  for (let j = 2; j <= k - i; ++j) {
    denom *= j;
  }
  return nom / denom;
}
__name(calcKoverI, "calcKoverI");
function calcRationalCurveDerivatives(Pders) {
  const nd = Pders.length;
  const Aders = [];
  const wders = [];
  for (let i = 0; i < nd; ++i) {
    const point = Pders[i];
    Aders[i] = new Vector3(point.x, point.y, point.z);
    wders[i] = point.w;
  }
  const CK = [];
  for (let k = 0; k < nd; ++k) {
    const v = Aders[k].clone();
    for (let i = 1; i <= k; ++i) {
      v.sub(CK[k - i].clone().multiplyScalar(calcKoverI(k, i) * wders[i]));
    }
    CK[k] = v.divideScalar(wders[0]);
  }
  return CK;
}
__name(calcRationalCurveDerivatives, "calcRationalCurveDerivatives");
function calcNURBSDerivatives(p, U, P, u, nd) {
  const Pders = calcBSplineDerivatives(p, U, P, u, nd);
  return calcRationalCurveDerivatives(Pders);
}
__name(calcNURBSDerivatives, "calcNURBSDerivatives");
class NURBSCurve extends Curve {
  static {
    __name(this, "NURBSCurve");
  }
  constructor(degree, knots, controlPoints, startKnot, endKnot) {
    super();
    const knotsLength = knots ? knots.length - 1 : 0;
    const pointsLength = controlPoints ? controlPoints.length : 0;
    this.degree = degree;
    this.knots = knots;
    this.controlPoints = [];
    this.startKnot = startKnot || 0;
    this.endKnot = endKnot || knotsLength;
    for (let i = 0; i < pointsLength; ++i) {
      const point = controlPoints[i];
      this.controlPoints[i] = new Vector4(point.x, point.y, point.z, point.w);
    }
  }
  getPoint(t, optionalTarget = new Vector3()) {
    const point = optionalTarget;
    const u = this.knots[this.startKnot] + t * (this.knots[this.endKnot] - this.knots[this.startKnot]);
    const hpoint = calcBSplinePoint(this.degree, this.knots, this.controlPoints, u);
    if (hpoint.w !== 1) {
      hpoint.divideScalar(hpoint.w);
    }
    return point.set(hpoint.x, hpoint.y, hpoint.z);
  }
  getTangent(t, optionalTarget = new Vector3()) {
    const tangent = optionalTarget;
    const u = this.knots[0] + t * (this.knots[this.knots.length - 1] - this.knots[0]);
    const ders = calcNURBSDerivatives(this.degree, this.knots, this.controlPoints, u, 1);
    tangent.copy(ders[1]).normalize();
    return tangent;
  }
  toJSON() {
    const data = super.toJSON();
    data.degree = this.degree;
    data.knots = [...this.knots];
    data.controlPoints = this.controlPoints.map((p) => p.toArray());
    data.startKnot = this.startKnot;
    data.endKnot = this.endKnot;
    return data;
  }
  fromJSON(json) {
    super.fromJSON(json);
    this.degree = json.degree;
    this.knots = [...json.knots];
    this.controlPoints = json.controlPoints.map((p) => new Vector4(p[0], p[1], p[2], p[3]));
    this.startKnot = json.startKnot;
    this.endKnot = json.endKnot;
    return this;
  }
}
let fbxTree;
let connections;
let sceneGraph;
class FBXLoader extends Loader {
  static {
    __name(this, "FBXLoader");
  }
  constructor(manager) {
    super(manager);
  }
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const path = scope.path === "" ? LoaderUtils.extractUrlBase(url) : scope.path;
    const loader = new FileLoader(this.manager);
    loader.setPath(scope.path);
    loader.setResponseType("arraybuffer");
    loader.setRequestHeader(scope.requestHeader);
    loader.setWithCredentials(scope.withCredentials);
    loader.load(url, function(buffer) {
      try {
        onLoad(scope.parse(buffer, path));
      } catch (e) {
        if (onError) {
          onError(e);
        } else {
          console.error(e);
        }
        scope.manager.itemError(url);
      }
    }, onProgress, onError);
  }
  parse(FBXBuffer, path) {
    if (isFbxFormatBinary(FBXBuffer)) {
      fbxTree = new BinaryParser().parse(FBXBuffer);
    } else {
      const FBXText = convertArrayBufferToString(FBXBuffer);
      if (!isFbxFormatASCII(FBXText)) {
        throw new Error("THREE.FBXLoader: Unknown format.");
      }
      if (getFbxVersion(FBXText) < 7e3) {
        throw new Error("THREE.FBXLoader: FBX version not supported, FileVersion: " + getFbxVersion(FBXText));
      }
      fbxTree = new TextParser().parse(FBXText);
    }
    const textureLoader = new TextureLoader(this.manager).setPath(this.resourcePath || path).setCrossOrigin(this.crossOrigin);
    return new FBXTreeParser(textureLoader, this.manager).parse(fbxTree);
  }
}
class FBXTreeParser {
  static {
    __name(this, "FBXTreeParser");
  }
  constructor(textureLoader, manager) {
    this.textureLoader = textureLoader;
    this.manager = manager;
  }
  parse() {
    connections = this.parseConnections();
    const images = this.parseImages();
    const textures = this.parseTextures(images);
    const materials = this.parseMaterials(textures);
    const deformers = this.parseDeformers();
    const geometryMap = new GeometryParser().parse(deformers);
    this.parseScene(deformers, geometryMap, materials);
    return sceneGraph;
  }
  // Parses FBXTree.Connections which holds parent-child connections between objects (e.g. material -> texture, model->geometry )
  // and details the connection type
  parseConnections() {
    const connectionMap = /* @__PURE__ */ new Map();
    if ("Connections" in fbxTree) {
      const rawConnections = fbxTree.Connections.connections;
      rawConnections.forEach(function(rawConnection) {
        const fromID = rawConnection[0];
        const toID = rawConnection[1];
        const relationship = rawConnection[2];
        if (!connectionMap.has(fromID)) {
          connectionMap.set(fromID, {
            parents: [],
            children: []
          });
        }
        const parentRelationship = { ID: toID, relationship };
        connectionMap.get(fromID).parents.push(parentRelationship);
        if (!connectionMap.has(toID)) {
          connectionMap.set(toID, {
            parents: [],
            children: []
          });
        }
        const childRelationship = { ID: fromID, relationship };
        connectionMap.get(toID).children.push(childRelationship);
      });
    }
    return connectionMap;
  }
  // Parse FBXTree.Objects.Video for embedded image data
  // These images are connected to textures in FBXTree.Objects.Textures
  // via FBXTree.Connections.
  parseImages() {
    const images = {};
    const blobs = {};
    if ("Video" in fbxTree.Objects) {
      const videoNodes = fbxTree.Objects.Video;
      for (const nodeID in videoNodes) {
        const videoNode = videoNodes[nodeID];
        const id = parseInt(nodeID);
        images[id] = videoNode.RelativeFilename || videoNode.Filename;
        if ("Content" in videoNode) {
          const arrayBufferContent = videoNode.Content instanceof ArrayBuffer && videoNode.Content.byteLength > 0;
          const base64Content = typeof videoNode.Content === "string" && videoNode.Content !== "";
          if (arrayBufferContent || base64Content) {
            const image = this.parseImage(videoNodes[nodeID]);
            blobs[videoNode.RelativeFilename || videoNode.Filename] = image;
          }
        }
      }
    }
    for (const id in images) {
      const filename = images[id];
      if (blobs[filename] !== void 0) images[id] = blobs[filename];
      else images[id] = images[id].split("\\").pop();
    }
    return images;
  }
  // Parse embedded image data in FBXTree.Video.Content
  parseImage(videoNode) {
    const content = videoNode.Content;
    const fileName = videoNode.RelativeFilename || videoNode.Filename;
    const extension = fileName.slice(fileName.lastIndexOf(".") + 1).toLowerCase();
    let type;
    switch (extension) {
      case "bmp":
        type = "image/bmp";
        break;
      case "jpg":
      case "jpeg":
        type = "image/jpeg";
        break;
      case "png":
        type = "image/png";
        break;
      case "tif":
        type = "image/tiff";
        break;
      case "tga":
        if (this.manager.getHandler(".tga") === null) {
          console.warn("FBXLoader: TGA loader not found, skipping ", fileName);
        }
        type = "image/tga";
        break;
      default:
        console.warn('FBXLoader: Image type "' + extension + '" is not supported.');
        return;
    }
    if (typeof content === "string") {
      return "data:" + type + ";base64," + content;
    } else {
      const array = new Uint8Array(content);
      return window.URL.createObjectURL(new Blob([array], { type }));
    }
  }
  // Parse nodes in FBXTree.Objects.Texture
  // These contain details such as UV scaling, cropping, rotation etc and are connected
  // to images in FBXTree.Objects.Video
  parseTextures(images) {
    const textureMap = /* @__PURE__ */ new Map();
    if ("Texture" in fbxTree.Objects) {
      const textureNodes = fbxTree.Objects.Texture;
      for (const nodeID in textureNodes) {
        const texture = this.parseTexture(textureNodes[nodeID], images);
        textureMap.set(parseInt(nodeID), texture);
      }
    }
    return textureMap;
  }
  // Parse individual node in FBXTree.Objects.Texture
  parseTexture(textureNode, images) {
    const texture = this.loadTexture(textureNode, images);
    texture.ID = textureNode.id;
    texture.name = textureNode.attrName;
    const wrapModeU = textureNode.WrapModeU;
    const wrapModeV = textureNode.WrapModeV;
    const valueU = wrapModeU !== void 0 ? wrapModeU.value : 0;
    const valueV = wrapModeV !== void 0 ? wrapModeV.value : 0;
    texture.wrapS = valueU === 0 ? RepeatWrapping : ClampToEdgeWrapping;
    texture.wrapT = valueV === 0 ? RepeatWrapping : ClampToEdgeWrapping;
    if ("Scaling" in textureNode) {
      const values = textureNode.Scaling.value;
      texture.repeat.x = values[0];
      texture.repeat.y = values[1];
    }
    if ("Translation" in textureNode) {
      const values = textureNode.Translation.value;
      texture.offset.x = values[0];
      texture.offset.y = values[1];
    }
    return texture;
  }
  // load a texture specified as a blob or data URI, or via an external URL using TextureLoader
  loadTexture(textureNode, images) {
    const nonNativeExtensions = /* @__PURE__ */ new Set(["tga", "tif", "tiff", "exr", "dds", "hdr", "ktx2"]);
    const extension = textureNode.FileName.split(".").pop().toLowerCase();
    const loader = nonNativeExtensions.has(extension) ? this.manager.getHandler(`.${extension}`) : this.textureLoader;
    if (!loader) {
      console.warn(
        `FBXLoader: ${extension.toUpperCase()} loader not found, creating placeholder texture for`,
        textureNode.RelativeFilename
      );
      return new Texture();
    }
    const loaderPath = loader.path;
    if (!loaderPath) {
      loader.setPath(this.textureLoader.path);
    }
    const children = connections.get(textureNode.id).children;
    let fileName;
    if (children !== void 0 && children.length > 0 && images[children[0].ID] !== void 0) {
      fileName = images[children[0].ID];
      if (fileName.indexOf("blob:") === 0 || fileName.indexOf("data:") === 0) {
        loader.setPath(void 0);
      }
    }
    const texture = loader.load(fileName);
    loader.setPath(loaderPath);
    return texture;
  }
  // Parse nodes in FBXTree.Objects.Material
  parseMaterials(textureMap) {
    const materialMap = /* @__PURE__ */ new Map();
    if ("Material" in fbxTree.Objects) {
      const materialNodes = fbxTree.Objects.Material;
      for (const nodeID in materialNodes) {
        const material = this.parseMaterial(materialNodes[nodeID], textureMap);
        if (material !== null) materialMap.set(parseInt(nodeID), material);
      }
    }
    return materialMap;
  }
  // Parse single node in FBXTree.Objects.Material
  // Materials are connected to texture maps in FBXTree.Objects.Textures
  // FBX format currently only supports Lambert and Phong shading models
  parseMaterial(materialNode, textureMap) {
    const ID = materialNode.id;
    const name = materialNode.attrName;
    let type = materialNode.ShadingModel;
    if (typeof type === "object") {
      type = type.value;
    }
    if (!connections.has(ID)) return null;
    const parameters = this.parseParameters(materialNode, textureMap, ID);
    let material;
    switch (type.toLowerCase()) {
      case "phong":
        material = new MeshPhongMaterial();
        break;
      case "lambert":
        material = new MeshLambertMaterial();
        break;
      default:
        console.warn('THREE.FBXLoader: unknown material type "%s". Defaulting to MeshPhongMaterial.', type);
        material = new MeshPhongMaterial();
        break;
    }
    material.setValues(parameters);
    material.name = name;
    return material;
  }
  // Parse FBX material and return parameters suitable for a three.js material
  // Also parse the texture map and return any textures associated with the material
  parseParameters(materialNode, textureMap, ID) {
    const parameters = {};
    if (materialNode.BumpFactor) {
      parameters.bumpScale = materialNode.BumpFactor.value;
    }
    if (materialNode.Diffuse) {
      parameters.color = ColorManagement.toWorkingColorSpace(new Color().fromArray(materialNode.Diffuse.value), SRGBColorSpace);
    } else if (materialNode.DiffuseColor && (materialNode.DiffuseColor.type === "Color" || materialNode.DiffuseColor.type === "ColorRGB")) {
      parameters.color = ColorManagement.toWorkingColorSpace(new Color().fromArray(materialNode.DiffuseColor.value), SRGBColorSpace);
    }
    if (materialNode.DisplacementFactor) {
      parameters.displacementScale = materialNode.DisplacementFactor.value;
    }
    if (materialNode.Emissive) {
      parameters.emissive = ColorManagement.toWorkingColorSpace(new Color().fromArray(materialNode.Emissive.value), SRGBColorSpace);
    } else if (materialNode.EmissiveColor && (materialNode.EmissiveColor.type === "Color" || materialNode.EmissiveColor.type === "ColorRGB")) {
      parameters.emissive = ColorManagement.toWorkingColorSpace(new Color().fromArray(materialNode.EmissiveColor.value), SRGBColorSpace);
    }
    if (materialNode.EmissiveFactor) {
      parameters.emissiveIntensity = parseFloat(materialNode.EmissiveFactor.value);
    }
    parameters.opacity = 1 - (materialNode.TransparencyFactor ? parseFloat(materialNode.TransparencyFactor.value) : 0);
    if (parameters.opacity === 1 || parameters.opacity === 0) {
      parameters.opacity = materialNode.Opacity ? parseFloat(materialNode.Opacity.value) : null;
      if (parameters.opacity === null) {
        parameters.opacity = 1 - (materialNode.TransparentColor ? parseFloat(materialNode.TransparentColor.value[0]) : 0);
      }
    }
    if (parameters.opacity < 1) {
      parameters.transparent = true;
    }
    if (materialNode.ReflectionFactor) {
      parameters.reflectivity = materialNode.ReflectionFactor.value;
    }
    if (materialNode.Shininess) {
      parameters.shininess = materialNode.Shininess.value;
    }
    if (materialNode.Specular) {
      parameters.specular = ColorManagement.toWorkingColorSpace(new Color().fromArray(materialNode.Specular.value), SRGBColorSpace);
    } else if (materialNode.SpecularColor && materialNode.SpecularColor.type === "Color") {
      parameters.specular = ColorManagement.toWorkingColorSpace(new Color().fromArray(materialNode.SpecularColor.value), SRGBColorSpace);
    }
    const scope = this;
    connections.get(ID).children.forEach(function(child) {
      const type = child.relationship;
      switch (type) {
        case "Bump":
          parameters.bumpMap = scope.getTexture(textureMap, child.ID);
          break;
        case "Maya|TEX_ao_map":
          parameters.aoMap = scope.getTexture(textureMap, child.ID);
          break;
        case "DiffuseColor":
        case "Maya|TEX_color_map":
          parameters.map = scope.getTexture(textureMap, child.ID);
          if (parameters.map !== void 0) {
            parameters.map.colorSpace = SRGBColorSpace;
          }
          break;
        case "DisplacementColor":
          parameters.displacementMap = scope.getTexture(textureMap, child.ID);
          break;
        case "EmissiveColor":
          parameters.emissiveMap = scope.getTexture(textureMap, child.ID);
          if (parameters.emissiveMap !== void 0) {
            parameters.emissiveMap.colorSpace = SRGBColorSpace;
          }
          break;
        case "NormalMap":
        case "Maya|TEX_normal_map":
          parameters.normalMap = scope.getTexture(textureMap, child.ID);
          break;
        case "ReflectionColor":
          parameters.envMap = scope.getTexture(textureMap, child.ID);
          if (parameters.envMap !== void 0) {
            parameters.envMap.mapping = EquirectangularReflectionMapping;
            parameters.envMap.colorSpace = SRGBColorSpace;
          }
          break;
        case "SpecularColor":
          parameters.specularMap = scope.getTexture(textureMap, child.ID);
          if (parameters.specularMap !== void 0) {
            parameters.specularMap.colorSpace = SRGBColorSpace;
          }
          break;
        case "TransparentColor":
        case "TransparencyFactor":
          parameters.alphaMap = scope.getTexture(textureMap, child.ID);
          parameters.transparent = true;
          break;
        case "AmbientColor":
        case "ShininessExponent":
        // AKA glossiness map
        case "SpecularFactor":
        // AKA specularLevel
        case "VectorDisplacementColor":
        // NOTE: Seems to be a copy of DisplacementColor
        default:
          console.warn("THREE.FBXLoader: %s map is not supported in three.js, skipping texture.", type);
          break;
      }
    });
    return parameters;
  }
  // get a texture from the textureMap for use by a material.
  getTexture(textureMap, id) {
    if ("LayeredTexture" in fbxTree.Objects && id in fbxTree.Objects.LayeredTexture) {
      console.warn("THREE.FBXLoader: layered textures are not supported in three.js. Discarding all but first layer.");
      id = connections.get(id).children[0].ID;
    }
    return textureMap.get(id);
  }
  // Parse nodes in FBXTree.Objects.Deformer
  // Deformer node can contain skinning or Vertex Cache animation data, however only skinning is supported here
  // Generates map of Skeleton-like objects for use later when generating and binding skeletons.
  parseDeformers() {
    const skeletons = {};
    const morphTargets = {};
    if ("Deformer" in fbxTree.Objects) {
      const DeformerNodes = fbxTree.Objects.Deformer;
      for (const nodeID in DeformerNodes) {
        const deformerNode = DeformerNodes[nodeID];
        const relationships = connections.get(parseInt(nodeID));
        if (deformerNode.attrType === "Skin") {
          const skeleton = this.parseSkeleton(relationships, DeformerNodes);
          skeleton.ID = nodeID;
          if (relationships.parents.length > 1) console.warn("THREE.FBXLoader: skeleton attached to more than one geometry is not supported.");
          skeleton.geometryID = relationships.parents[0].ID;
          skeletons[nodeID] = skeleton;
        } else if (deformerNode.attrType === "BlendShape") {
          const morphTarget = {
            id: nodeID
          };
          morphTarget.rawTargets = this.parseMorphTargets(relationships, DeformerNodes);
          morphTarget.id = nodeID;
          if (relationships.parents.length > 1) console.warn("THREE.FBXLoader: morph target attached to more than one geometry is not supported.");
          morphTargets[nodeID] = morphTarget;
        }
      }
    }
    return {
      skeletons,
      morphTargets
    };
  }
  // Parse single nodes in FBXTree.Objects.Deformer
  // The top level skeleton node has type 'Skin' and sub nodes have type 'Cluster'
  // Each skin node represents a skeleton and each cluster node represents a bone
  parseSkeleton(relationships, deformerNodes) {
    const rawBones = [];
    relationships.children.forEach(function(child) {
      const boneNode = deformerNodes[child.ID];
      if (boneNode.attrType !== "Cluster") return;
      const rawBone = {
        ID: child.ID,
        indices: [],
        weights: [],
        transformLink: new Matrix4().fromArray(boneNode.TransformLink.a)
        // transform: new Matrix4().fromArray( boneNode.Transform.a ),
        // linkMode: boneNode.Mode,
      };
      if ("Indexes" in boneNode) {
        rawBone.indices = boneNode.Indexes.a;
        rawBone.weights = boneNode.Weights.a;
      }
      rawBones.push(rawBone);
    });
    return {
      rawBones,
      bones: []
    };
  }
  // The top level morph deformer node has type "BlendShape" and sub nodes have type "BlendShapeChannel"
  parseMorphTargets(relationships, deformerNodes) {
    const rawMorphTargets = [];
    for (let i = 0; i < relationships.children.length; i++) {
      const child = relationships.children[i];
      const morphTargetNode = deformerNodes[child.ID];
      const rawMorphTarget = {
        name: morphTargetNode.attrName,
        initialWeight: morphTargetNode.DeformPercent,
        id: morphTargetNode.id,
        fullWeights: morphTargetNode.FullWeights.a
      };
      if (morphTargetNode.attrType !== "BlendShapeChannel") return;
      rawMorphTarget.geoID = connections.get(parseInt(child.ID)).children.filter(function(child2) {
        return child2.relationship === void 0;
      })[0].ID;
      rawMorphTargets.push(rawMorphTarget);
    }
    return rawMorphTargets;
  }
  // create the main Group() to be returned by the loader
  parseScene(deformers, geometryMap, materialMap) {
    sceneGraph = new Group();
    const modelMap = this.parseModels(deformers.skeletons, geometryMap, materialMap);
    const modelNodes = fbxTree.Objects.Model;
    const scope = this;
    modelMap.forEach(function(model) {
      const modelNode = modelNodes[model.ID];
      scope.setLookAtProperties(model, modelNode);
      const parentConnections = connections.get(model.ID).parents;
      parentConnections.forEach(function(connection) {
        const parent = modelMap.get(connection.ID);
        if (parent !== void 0) parent.add(model);
      });
      if (model.parent === null) {
        sceneGraph.add(model);
      }
    });
    this.bindSkeleton(deformers.skeletons, geometryMap, modelMap);
    this.addGlobalSceneSettings();
    sceneGraph.traverse(function(node) {
      if (node.userData.transformData) {
        if (node.parent) {
          node.userData.transformData.parentMatrix = node.parent.matrix;
          node.userData.transformData.parentMatrixWorld = node.parent.matrixWorld;
        }
        const transform = generateTransform(node.userData.transformData);
        node.applyMatrix4(transform);
        node.updateWorldMatrix();
      }
    });
    const animations = new AnimationParser().parse();
    if (sceneGraph.children.length === 1 && sceneGraph.children[0].isGroup) {
      sceneGraph.children[0].animations = animations;
      sceneGraph = sceneGraph.children[0];
    }
    sceneGraph.animations = animations;
  }
  // parse nodes in FBXTree.Objects.Model
  parseModels(skeletons, geometryMap, materialMap) {
    const modelMap = /* @__PURE__ */ new Map();
    const modelNodes = fbxTree.Objects.Model;
    for (const nodeID in modelNodes) {
      const id = parseInt(nodeID);
      const node = modelNodes[nodeID];
      const relationships = connections.get(id);
      let model = this.buildSkeleton(relationships, skeletons, id, node.attrName);
      if (!model) {
        switch (node.attrType) {
          case "Camera":
            model = this.createCamera(relationships);
            break;
          case "Light":
            model = this.createLight(relationships);
            break;
          case "Mesh":
            model = this.createMesh(relationships, geometryMap, materialMap);
            break;
          case "NurbsCurve":
            model = this.createCurve(relationships, geometryMap);
            break;
          case "LimbNode":
          case "Root":
            model = new Bone();
            break;
          case "Null":
          default:
            model = new Group();
            break;
        }
        model.name = node.attrName ? PropertyBinding.sanitizeNodeName(node.attrName) : "";
        model.userData.originalName = node.attrName;
        model.ID = id;
      }
      this.getTransformData(model, node);
      modelMap.set(id, model);
    }
    return modelMap;
  }
  buildSkeleton(relationships, skeletons, id, name) {
    let bone = null;
    relationships.parents.forEach(function(parent) {
      for (const ID in skeletons) {
        const skeleton = skeletons[ID];
        skeleton.rawBones.forEach(function(rawBone, i) {
          if (rawBone.ID === parent.ID) {
            const subBone = bone;
            bone = new Bone();
            bone.matrixWorld.copy(rawBone.transformLink);
            bone.name = name ? PropertyBinding.sanitizeNodeName(name) : "";
            bone.userData.originalName = name;
            bone.ID = id;
            skeleton.bones[i] = bone;
            if (subBone !== null) {
              bone.add(subBone);
            }
          }
        });
      }
    });
    return bone;
  }
  // create a PerspectiveCamera or OrthographicCamera
  createCamera(relationships) {
    let model;
    let cameraAttribute;
    relationships.children.forEach(function(child) {
      const attr = fbxTree.Objects.NodeAttribute[child.ID];
      if (attr !== void 0) {
        cameraAttribute = attr;
      }
    });
    if (cameraAttribute === void 0) {
      model = new Object3D();
    } else {
      let type = 0;
      if (cameraAttribute.CameraProjectionType !== void 0 && cameraAttribute.CameraProjectionType.value === 1) {
        type = 1;
      }
      let nearClippingPlane = 1;
      if (cameraAttribute.NearPlane !== void 0) {
        nearClippingPlane = cameraAttribute.NearPlane.value / 1e3;
      }
      let farClippingPlane = 1e3;
      if (cameraAttribute.FarPlane !== void 0) {
        farClippingPlane = cameraAttribute.FarPlane.value / 1e3;
      }
      let width = window.innerWidth;
      let height = window.innerHeight;
      if (cameraAttribute.AspectWidth !== void 0 && cameraAttribute.AspectHeight !== void 0) {
        width = cameraAttribute.AspectWidth.value;
        height = cameraAttribute.AspectHeight.value;
      }
      const aspect2 = width / height;
      let fov2 = 45;
      if (cameraAttribute.FieldOfView !== void 0) {
        fov2 = cameraAttribute.FieldOfView.value;
      }
      const focalLength = cameraAttribute.FocalLength ? cameraAttribute.FocalLength.value : null;
      switch (type) {
        case 0:
          model = new PerspectiveCamera(fov2, aspect2, nearClippingPlane, farClippingPlane);
          if (focalLength !== null) model.setFocalLength(focalLength);
          break;
        case 1:
          console.warn("THREE.FBXLoader: Orthographic cameras not supported yet.");
          model = new Object3D();
          break;
        default:
          console.warn("THREE.FBXLoader: Unknown camera type " + type + ".");
          model = new Object3D();
          break;
      }
    }
    return model;
  }
  // Create a DirectionalLight, PointLight or SpotLight
  createLight(relationships) {
    let model;
    let lightAttribute;
    relationships.children.forEach(function(child) {
      const attr = fbxTree.Objects.NodeAttribute[child.ID];
      if (attr !== void 0) {
        lightAttribute = attr;
      }
    });
    if (lightAttribute === void 0) {
      model = new Object3D();
    } else {
      let type;
      if (lightAttribute.LightType === void 0) {
        type = 0;
      } else {
        type = lightAttribute.LightType.value;
      }
      let color = 16777215;
      if (lightAttribute.Color !== void 0) {
        color = ColorManagement.toWorkingColorSpace(new Color().fromArray(lightAttribute.Color.value), SRGBColorSpace);
      }
      let intensity = lightAttribute.Intensity === void 0 ? 1 : lightAttribute.Intensity.value / 100;
      if (lightAttribute.CastLightOnObject !== void 0 && lightAttribute.CastLightOnObject.value === 0) {
        intensity = 0;
      }
      let distance = 0;
      if (lightAttribute.FarAttenuationEnd !== void 0) {
        if (lightAttribute.EnableFarAttenuation !== void 0 && lightAttribute.EnableFarAttenuation.value === 0) {
          distance = 0;
        } else {
          distance = lightAttribute.FarAttenuationEnd.value;
        }
      }
      const decay = 1;
      switch (type) {
        case 0:
          model = new PointLight(color, intensity, distance, decay);
          break;
        case 1:
          model = new DirectionalLight(color, intensity);
          break;
        case 2:
          let angle = Math.PI / 3;
          if (lightAttribute.InnerAngle !== void 0) {
            angle = MathUtils.degToRad(lightAttribute.InnerAngle.value);
          }
          let penumbra = 0;
          if (lightAttribute.OuterAngle !== void 0) {
            penumbra = MathUtils.degToRad(lightAttribute.OuterAngle.value);
            penumbra = Math.max(penumbra, 1);
          }
          model = new SpotLight(color, intensity, distance, angle, penumbra, decay);
          break;
        default:
          console.warn("THREE.FBXLoader: Unknown light type " + lightAttribute.LightType.value + ", defaulting to a PointLight.");
          model = new PointLight(color, intensity);
          break;
      }
      if (lightAttribute.CastShadows !== void 0 && lightAttribute.CastShadows.value === 1) {
        model.castShadow = true;
      }
    }
    return model;
  }
  createMesh(relationships, geometryMap, materialMap) {
    let model;
    let geometry = null;
    let material = null;
    const materials = [];
    relationships.children.forEach(function(child) {
      if (geometryMap.has(child.ID)) {
        geometry = geometryMap.get(child.ID);
      }
      if (materialMap.has(child.ID)) {
        materials.push(materialMap.get(child.ID));
      }
    });
    if (materials.length > 1) {
      material = materials;
    } else if (materials.length > 0) {
      material = materials[0];
    } else {
      material = new MeshPhongMaterial({
        name: Loader.DEFAULT_MATERIAL_NAME,
        color: 13421772
      });
      materials.push(material);
    }
    if ("color" in geometry.attributes) {
      materials.forEach(function(material2) {
        material2.vertexColors = true;
      });
    }
    if (geometry.FBX_Deformer) {
      model = new SkinnedMesh(geometry, material);
      model.normalizeSkinWeights();
    } else {
      model = new Mesh(geometry, material);
    }
    return model;
  }
  createCurve(relationships, geometryMap) {
    const geometry = relationships.children.reduce(function(geo, child) {
      if (geometryMap.has(child.ID)) geo = geometryMap.get(child.ID);
      return geo;
    }, null);
    const material = new LineBasicMaterial({
      name: Loader.DEFAULT_MATERIAL_NAME,
      color: 3342591,
      linewidth: 1
    });
    return new Line(geometry, material);
  }
  // parse the model node for transform data
  getTransformData(model, modelNode) {
    const transformData = {};
    if ("InheritType" in modelNode) transformData.inheritType = parseInt(modelNode.InheritType.value);
    if ("RotationOrder" in modelNode) transformData.eulerOrder = getEulerOrder(modelNode.RotationOrder.value);
    else transformData.eulerOrder = getEulerOrder(0);
    if ("Lcl_Translation" in modelNode) transformData.translation = modelNode.Lcl_Translation.value;
    if ("PreRotation" in modelNode) transformData.preRotation = modelNode.PreRotation.value;
    if ("Lcl_Rotation" in modelNode) transformData.rotation = modelNode.Lcl_Rotation.value;
    if ("PostRotation" in modelNode) transformData.postRotation = modelNode.PostRotation.value;
    if ("Lcl_Scaling" in modelNode) transformData.scale = modelNode.Lcl_Scaling.value;
    if ("ScalingOffset" in modelNode) transformData.scalingOffset = modelNode.ScalingOffset.value;
    if ("ScalingPivot" in modelNode) transformData.scalingPivot = modelNode.ScalingPivot.value;
    if ("RotationOffset" in modelNode) transformData.rotationOffset = modelNode.RotationOffset.value;
    if ("RotationPivot" in modelNode) transformData.rotationPivot = modelNode.RotationPivot.value;
    model.userData.transformData = transformData;
  }
  setLookAtProperties(model, modelNode) {
    if ("LookAtProperty" in modelNode) {
      const children = connections.get(model.ID).children;
      children.forEach(function(child) {
        if (child.relationship === "LookAtProperty") {
          const lookAtTarget = fbxTree.Objects.Model[child.ID];
          if ("Lcl_Translation" in lookAtTarget) {
            const pos = lookAtTarget.Lcl_Translation.value;
            if (model.target !== void 0) {
              model.target.position.fromArray(pos);
              sceneGraph.add(model.target);
            } else {
              model.lookAt(new Vector3().fromArray(pos));
            }
          }
        }
      });
    }
  }
  bindSkeleton(skeletons, geometryMap, modelMap) {
    const bindMatrices = this.parsePoseNodes();
    for (const ID in skeletons) {
      const skeleton = skeletons[ID];
      const parents = connections.get(parseInt(skeleton.ID)).parents;
      parents.forEach(function(parent) {
        if (geometryMap.has(parent.ID)) {
          const geoID = parent.ID;
          const geoRelationships = connections.get(geoID);
          geoRelationships.parents.forEach(function(geoConnParent) {
            if (modelMap.has(geoConnParent.ID)) {
              const model = modelMap.get(geoConnParent.ID);
              model.bind(new Skeleton(skeleton.bones), bindMatrices[geoConnParent.ID]);
            }
          });
        }
      });
    }
  }
  parsePoseNodes() {
    const bindMatrices = {};
    if ("Pose" in fbxTree.Objects) {
      const BindPoseNode = fbxTree.Objects.Pose;
      for (const nodeID in BindPoseNode) {
        if (BindPoseNode[nodeID].attrType === "BindPose" && BindPoseNode[nodeID].NbPoseNodes > 0) {
          const poseNodes = BindPoseNode[nodeID].PoseNode;
          if (Array.isArray(poseNodes)) {
            poseNodes.forEach(function(poseNode) {
              bindMatrices[poseNode.Node] = new Matrix4().fromArray(poseNode.Matrix.a);
            });
          } else {
            bindMatrices[poseNodes.Node] = new Matrix4().fromArray(poseNodes.Matrix.a);
          }
        }
      }
    }
    return bindMatrices;
  }
  addGlobalSceneSettings() {
    if ("GlobalSettings" in fbxTree) {
      if ("AmbientColor" in fbxTree.GlobalSettings) {
        const ambientColor = fbxTree.GlobalSettings.AmbientColor.value;
        const r = ambientColor[0];
        const g = ambientColor[1];
        const b = ambientColor[2];
        if (r !== 0 || g !== 0 || b !== 0) {
          const color = new Color().setRGB(r, g, b, SRGBColorSpace);
          sceneGraph.add(new AmbientLight(color, 1));
        }
      }
      if ("UnitScaleFactor" in fbxTree.GlobalSettings) {
        sceneGraph.userData.unitScaleFactor = fbxTree.GlobalSettings.UnitScaleFactor.value;
      }
    }
  }
}
class GeometryParser {
  static {
    __name(this, "GeometryParser");
  }
  constructor() {
    this.negativeMaterialIndices = false;
  }
  // Parse nodes in FBXTree.Objects.Geometry
  parse(deformers) {
    const geometryMap = /* @__PURE__ */ new Map();
    if ("Geometry" in fbxTree.Objects) {
      const geoNodes = fbxTree.Objects.Geometry;
      for (const nodeID in geoNodes) {
        const relationships = connections.get(parseInt(nodeID));
        const geo = this.parseGeometry(relationships, geoNodes[nodeID], deformers);
        geometryMap.set(parseInt(nodeID), geo);
      }
    }
    if (this.negativeMaterialIndices === true) {
      console.warn("THREE.FBXLoader: The FBX file contains invalid (negative) material indices. The asset might not render as expected.");
    }
    return geometryMap;
  }
  // Parse single node in FBXTree.Objects.Geometry
  parseGeometry(relationships, geoNode, deformers) {
    switch (geoNode.attrType) {
      case "Mesh":
        return this.parseMeshGeometry(relationships, geoNode, deformers);
      case "NurbsCurve":
        return this.parseNurbsGeometry(geoNode);
    }
  }
  // Parse single node mesh geometry in FBXTree.Objects.Geometry
  parseMeshGeometry(relationships, geoNode, deformers) {
    const skeletons = deformers.skeletons;
    const morphTargets = [];
    const modelNodes = relationships.parents.map(function(parent) {
      return fbxTree.Objects.Model[parent.ID];
    });
    if (modelNodes.length === 0) return;
    const skeleton = relationships.children.reduce(function(skeleton2, child) {
      if (skeletons[child.ID] !== void 0) skeleton2 = skeletons[child.ID];
      return skeleton2;
    }, null);
    relationships.children.forEach(function(child) {
      if (deformers.morphTargets[child.ID] !== void 0) {
        morphTargets.push(deformers.morphTargets[child.ID]);
      }
    });
    const modelNode = modelNodes[0];
    const transformData = {};
    if ("RotationOrder" in modelNode) transformData.eulerOrder = getEulerOrder(modelNode.RotationOrder.value);
    if ("InheritType" in modelNode) transformData.inheritType = parseInt(modelNode.InheritType.value);
    if ("GeometricTranslation" in modelNode) transformData.translation = modelNode.GeometricTranslation.value;
    if ("GeometricRotation" in modelNode) transformData.rotation = modelNode.GeometricRotation.value;
    if ("GeometricScaling" in modelNode) transformData.scale = modelNode.GeometricScaling.value;
    const transform = generateTransform(transformData);
    return this.genGeometry(geoNode, skeleton, morphTargets, transform);
  }
  // Generate a BufferGeometry from a node in FBXTree.Objects.Geometry
  genGeometry(geoNode, skeleton, morphTargets, preTransform) {
    const geo = new BufferGeometry();
    if (geoNode.attrName) geo.name = geoNode.attrName;
    const geoInfo = this.parseGeoNode(geoNode, skeleton);
    const buffers = this.genBuffers(geoInfo);
    const positionAttribute = new Float32BufferAttribute(buffers.vertex, 3);
    positionAttribute.applyMatrix4(preTransform);
    geo.setAttribute("position", positionAttribute);
    if (buffers.colors.length > 0) {
      geo.setAttribute("color", new Float32BufferAttribute(buffers.colors, 3));
    }
    if (skeleton) {
      geo.setAttribute("skinIndex", new Uint16BufferAttribute(buffers.weightsIndices, 4));
      geo.setAttribute("skinWeight", new Float32BufferAttribute(buffers.vertexWeights, 4));
      geo.FBX_Deformer = skeleton;
    }
    if (buffers.normal.length > 0) {
      const normalMatrix = new Matrix3().getNormalMatrix(preTransform);
      const normalAttribute = new Float32BufferAttribute(buffers.normal, 3);
      normalAttribute.applyNormalMatrix(normalMatrix);
      geo.setAttribute("normal", normalAttribute);
    }
    buffers.uvs.forEach(function(uvBuffer, i) {
      const name = i === 0 ? "uv" : `uv${i}`;
      geo.setAttribute(name, new Float32BufferAttribute(buffers.uvs[i], 2));
    });
    if (geoInfo.material && geoInfo.material.mappingType !== "AllSame") {
      let prevMaterialIndex = buffers.materialIndex[0];
      let startIndex = 0;
      buffers.materialIndex.forEach(function(currentIndex, i) {
        if (currentIndex !== prevMaterialIndex) {
          geo.addGroup(startIndex, i - startIndex, prevMaterialIndex);
          prevMaterialIndex = currentIndex;
          startIndex = i;
        }
      });
      if (geo.groups.length > 0) {
        const lastGroup = geo.groups[geo.groups.length - 1];
        const lastIndex = lastGroup.start + lastGroup.count;
        if (lastIndex !== buffers.materialIndex.length) {
          geo.addGroup(lastIndex, buffers.materialIndex.length - lastIndex, prevMaterialIndex);
        }
      }
      if (geo.groups.length === 0) {
        geo.addGroup(0, buffers.materialIndex.length, buffers.materialIndex[0]);
      }
    }
    this.addMorphTargets(geo, geoNode, morphTargets, preTransform);
    return geo;
  }
  parseGeoNode(geoNode, skeleton) {
    const geoInfo = {};
    geoInfo.vertexPositions = geoNode.Vertices !== void 0 ? geoNode.Vertices.a : [];
    geoInfo.vertexIndices = geoNode.PolygonVertexIndex !== void 0 ? geoNode.PolygonVertexIndex.a : [];
    if (geoNode.LayerElementColor) {
      geoInfo.color = this.parseVertexColors(geoNode.LayerElementColor[0]);
    }
    if (geoNode.LayerElementMaterial) {
      geoInfo.material = this.parseMaterialIndices(geoNode.LayerElementMaterial[0]);
    }
    if (geoNode.LayerElementNormal) {
      geoInfo.normal = this.parseNormals(geoNode.LayerElementNormal[0]);
    }
    if (geoNode.LayerElementUV) {
      geoInfo.uv = [];
      let i = 0;
      while (geoNode.LayerElementUV[i]) {
        if (geoNode.LayerElementUV[i].UV) {
          geoInfo.uv.push(this.parseUVs(geoNode.LayerElementUV[i]));
        }
        i++;
      }
    }
    geoInfo.weightTable = {};
    if (skeleton !== null) {
      geoInfo.skeleton = skeleton;
      skeleton.rawBones.forEach(function(rawBone, i) {
        rawBone.indices.forEach(function(index, j) {
          if (geoInfo.weightTable[index] === void 0) geoInfo.weightTable[index] = [];
          geoInfo.weightTable[index].push({
            id: i,
            weight: rawBone.weights[j]
          });
        });
      });
    }
    return geoInfo;
  }
  genBuffers(geoInfo) {
    const buffers = {
      vertex: [],
      normal: [],
      colors: [],
      uvs: [],
      materialIndex: [],
      vertexWeights: [],
      weightsIndices: []
    };
    let polygonIndex = 0;
    let faceLength = 0;
    let displayedWeightsWarning = false;
    let facePositionIndexes = [];
    let faceNormals = [];
    let faceColors = [];
    let faceUVs = [];
    let faceWeights = [];
    let faceWeightIndices = [];
    const scope = this;
    geoInfo.vertexIndices.forEach(function(vertexIndex, polygonVertexIndex) {
      let materialIndex;
      let endOfFace = false;
      if (vertexIndex < 0) {
        vertexIndex = vertexIndex ^ -1;
        endOfFace = true;
      }
      let weightIndices = [];
      let weights = [];
      facePositionIndexes.push(vertexIndex * 3, vertexIndex * 3 + 1, vertexIndex * 3 + 2);
      if (geoInfo.color) {
        const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.color);
        faceColors.push(data[0], data[1], data[2]);
      }
      if (geoInfo.skeleton) {
        if (geoInfo.weightTable[vertexIndex] !== void 0) {
          geoInfo.weightTable[vertexIndex].forEach(function(wt) {
            weights.push(wt.weight);
            weightIndices.push(wt.id);
          });
        }
        if (weights.length > 4) {
          if (!displayedWeightsWarning) {
            console.warn("THREE.FBXLoader: Vertex has more than 4 skinning weights assigned to vertex. Deleting additional weights.");
            displayedWeightsWarning = true;
          }
          const wIndex = [0, 0, 0, 0];
          const Weight = [0, 0, 0, 0];
          weights.forEach(function(weight, weightIndex) {
            let currentWeight = weight;
            let currentIndex = weightIndices[weightIndex];
            Weight.forEach(function(comparedWeight, comparedWeightIndex, comparedWeightArray) {
              if (currentWeight > comparedWeight) {
                comparedWeightArray[comparedWeightIndex] = currentWeight;
                currentWeight = comparedWeight;
                const tmp = wIndex[comparedWeightIndex];
                wIndex[comparedWeightIndex] = currentIndex;
                currentIndex = tmp;
              }
            });
          });
          weightIndices = wIndex;
          weights = Weight;
        }
        while (weights.length < 4) {
          weights.push(0);
          weightIndices.push(0);
        }
        for (let i = 0; i < 4; ++i) {
          faceWeights.push(weights[i]);
          faceWeightIndices.push(weightIndices[i]);
        }
      }
      if (geoInfo.normal) {
        const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.normal);
        faceNormals.push(data[0], data[1], data[2]);
      }
      if (geoInfo.material && geoInfo.material.mappingType !== "AllSame") {
        materialIndex = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.material)[0];
        if (materialIndex < 0) {
          scope.negativeMaterialIndices = true;
          materialIndex = 0;
        }
      }
      if (geoInfo.uv) {
        geoInfo.uv.forEach(function(uv, i) {
          const data = getData(polygonVertexIndex, polygonIndex, vertexIndex, uv);
          if (faceUVs[i] === void 0) {
            faceUVs[i] = [];
          }
          faceUVs[i].push(data[0]);
          faceUVs[i].push(data[1]);
        });
      }
      faceLength++;
      if (endOfFace) {
        scope.genFace(buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength);
        polygonIndex++;
        faceLength = 0;
        facePositionIndexes = [];
        faceNormals = [];
        faceColors = [];
        faceUVs = [];
        faceWeights = [];
        faceWeightIndices = [];
      }
    });
    return buffers;
  }
  // See https://www.khronos.org/opengl/wiki/Calculating_a_Surface_Normal
  getNormalNewell(vertices) {
    const normal = new Vector3(0, 0, 0);
    for (let i = 0; i < vertices.length; i++) {
      const current = vertices[i];
      const next = vertices[(i + 1) % vertices.length];
      normal.x += (current.y - next.y) * (current.z + next.z);
      normal.y += (current.z - next.z) * (current.x + next.x);
      normal.z += (current.x - next.x) * (current.y + next.y);
    }
    normal.normalize();
    return normal;
  }
  getNormalTangentAndBitangent(vertices) {
    const normalVector = this.getNormalNewell(vertices);
    const up = Math.abs(normalVector.z) > 0.5 ? new Vector3(0, 1, 0) : new Vector3(0, 0, 1);
    const tangent = up.cross(normalVector).normalize();
    const bitangent = normalVector.clone().cross(tangent).normalize();
    return {
      normal: normalVector,
      tangent,
      bitangent
    };
  }
  flattenVertex(vertex2, normalTangent, normalBitangent) {
    return new Vector2(
      vertex2.dot(normalTangent),
      vertex2.dot(normalBitangent)
    );
  }
  // Generate data for a single face in a geometry. If the face is a quad then split it into 2 tris
  genFace(buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength) {
    let triangles;
    if (faceLength > 3) {
      const vertices = [];
      const positions = geoInfo.baseVertexPositions || geoInfo.vertexPositions;
      for (let i = 0; i < facePositionIndexes.length; i += 3) {
        vertices.push(
          new Vector3(
            positions[facePositionIndexes[i]],
            positions[facePositionIndexes[i + 1]],
            positions[facePositionIndexes[i + 2]]
          )
        );
      }
      const { tangent, bitangent } = this.getNormalTangentAndBitangent(vertices);
      const triangulationInput = [];
      for (const vertex2 of vertices) {
        triangulationInput.push(this.flattenVertex(vertex2, tangent, bitangent));
      }
      triangles = ShapeUtils.triangulateShape(triangulationInput, []);
    } else {
      triangles = [[0, 1, 2]];
    }
    for (const [i0, i1, i2] of triangles) {
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i0 * 3]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i0 * 3 + 1]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i0 * 3 + 2]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i1 * 3]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i1 * 3 + 1]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i1 * 3 + 2]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i2 * 3]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i2 * 3 + 1]]);
      buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i2 * 3 + 2]]);
      if (geoInfo.skeleton) {
        buffers.vertexWeights.push(faceWeights[i0 * 4]);
        buffers.vertexWeights.push(faceWeights[i0 * 4 + 1]);
        buffers.vertexWeights.push(faceWeights[i0 * 4 + 2]);
        buffers.vertexWeights.push(faceWeights[i0 * 4 + 3]);
        buffers.vertexWeights.push(faceWeights[i1 * 4]);
        buffers.vertexWeights.push(faceWeights[i1 * 4 + 1]);
        buffers.vertexWeights.push(faceWeights[i1 * 4 + 2]);
        buffers.vertexWeights.push(faceWeights[i1 * 4 + 3]);
        buffers.vertexWeights.push(faceWeights[i2 * 4]);
        buffers.vertexWeights.push(faceWeights[i2 * 4 + 1]);
        buffers.vertexWeights.push(faceWeights[i2 * 4 + 2]);
        buffers.vertexWeights.push(faceWeights[i2 * 4 + 3]);
        buffers.weightsIndices.push(faceWeightIndices[i0 * 4]);
        buffers.weightsIndices.push(faceWeightIndices[i0 * 4 + 1]);
        buffers.weightsIndices.push(faceWeightIndices[i0 * 4 + 2]);
        buffers.weightsIndices.push(faceWeightIndices[i0 * 4 + 3]);
        buffers.weightsIndices.push(faceWeightIndices[i1 * 4]);
        buffers.weightsIndices.push(faceWeightIndices[i1 * 4 + 1]);
        buffers.weightsIndices.push(faceWeightIndices[i1 * 4 + 2]);
        buffers.weightsIndices.push(faceWeightIndices[i1 * 4 + 3]);
        buffers.weightsIndices.push(faceWeightIndices[i2 * 4]);
        buffers.weightsIndices.push(faceWeightIndices[i2 * 4 + 1]);
        buffers.weightsIndices.push(faceWeightIndices[i2 * 4 + 2]);
        buffers.weightsIndices.push(faceWeightIndices[i2 * 4 + 3]);
      }
      if (geoInfo.color) {
        buffers.colors.push(faceColors[i0 * 3]);
        buffers.colors.push(faceColors[i0 * 3 + 1]);
        buffers.colors.push(faceColors[i0 * 3 + 2]);
        buffers.colors.push(faceColors[i1 * 3]);
        buffers.colors.push(faceColors[i1 * 3 + 1]);
        buffers.colors.push(faceColors[i1 * 3 + 2]);
        buffers.colors.push(faceColors[i2 * 3]);
        buffers.colors.push(faceColors[i2 * 3 + 1]);
        buffers.colors.push(faceColors[i2 * 3 + 2]);
      }
      if (geoInfo.material && geoInfo.material.mappingType !== "AllSame") {
        buffers.materialIndex.push(materialIndex);
        buffers.materialIndex.push(materialIndex);
        buffers.materialIndex.push(materialIndex);
      }
      if (geoInfo.normal) {
        buffers.normal.push(faceNormals[i0 * 3]);
        buffers.normal.push(faceNormals[i0 * 3 + 1]);
        buffers.normal.push(faceNormals[i0 * 3 + 2]);
        buffers.normal.push(faceNormals[i1 * 3]);
        buffers.normal.push(faceNormals[i1 * 3 + 1]);
        buffers.normal.push(faceNormals[i1 * 3 + 2]);
        buffers.normal.push(faceNormals[i2 * 3]);
        buffers.normal.push(faceNormals[i2 * 3 + 1]);
        buffers.normal.push(faceNormals[i2 * 3 + 2]);
      }
      if (geoInfo.uv) {
        geoInfo.uv.forEach(function(uv, j) {
          if (buffers.uvs[j] === void 0) buffers.uvs[j] = [];
          buffers.uvs[j].push(faceUVs[j][i0 * 2]);
          buffers.uvs[j].push(faceUVs[j][i0 * 2 + 1]);
          buffers.uvs[j].push(faceUVs[j][i1 * 2]);
          buffers.uvs[j].push(faceUVs[j][i1 * 2 + 1]);
          buffers.uvs[j].push(faceUVs[j][i2 * 2]);
          buffers.uvs[j].push(faceUVs[j][i2 * 2 + 1]);
        });
      }
    }
  }
  addMorphTargets(parentGeo, parentGeoNode, morphTargets, preTransform) {
    if (morphTargets.length === 0) return;
    parentGeo.morphTargetsRelative = true;
    parentGeo.morphAttributes.position = [];
    const scope = this;
    morphTargets.forEach(function(morphTarget) {
      morphTarget.rawTargets.forEach(function(rawTarget) {
        const morphGeoNode = fbxTree.Objects.Geometry[rawTarget.geoID];
        if (morphGeoNode !== void 0) {
          scope.genMorphGeometry(parentGeo, parentGeoNode, morphGeoNode, preTransform, rawTarget.name);
        }
      });
    });
  }
  // a morph geometry node is similar to a standard  node, and the node is also contained
  // in FBXTree.Objects.Geometry, however it can only have attributes for position, normal
  // and a special attribute Index defining which vertices of the original geometry are affected
  // Normal and position attributes only have data for the vertices that are affected by the morph
  genMorphGeometry(parentGeo, parentGeoNode, morphGeoNode, preTransform, name) {
    const basePositions = parentGeoNode.Vertices !== void 0 ? parentGeoNode.Vertices.a : [];
    const baseIndices = parentGeoNode.PolygonVertexIndex !== void 0 ? parentGeoNode.PolygonVertexIndex.a : [];
    const morphPositionsSparse = morphGeoNode.Vertices !== void 0 ? morphGeoNode.Vertices.a : [];
    const morphIndices = morphGeoNode.Indexes !== void 0 ? morphGeoNode.Indexes.a : [];
    const length = parentGeo.attributes.position.count * 3;
    const morphPositions = new Float32Array(length);
    for (let i = 0; i < morphIndices.length; i++) {
      const morphIndex = morphIndices[i] * 3;
      morphPositions[morphIndex] = morphPositionsSparse[i * 3];
      morphPositions[morphIndex + 1] = morphPositionsSparse[i * 3 + 1];
      morphPositions[morphIndex + 2] = morphPositionsSparse[i * 3 + 2];
    }
    const morphGeoInfo = {
      vertexIndices: baseIndices,
      vertexPositions: morphPositions,
      baseVertexPositions: basePositions
    };
    const morphBuffers = this.genBuffers(morphGeoInfo);
    const positionAttribute = new Float32BufferAttribute(morphBuffers.vertex, 3);
    positionAttribute.name = name || morphGeoNode.attrName;
    positionAttribute.applyMatrix4(preTransform);
    parentGeo.morphAttributes.position.push(positionAttribute);
  }
  // Parse normal from FBXTree.Objects.Geometry.LayerElementNormal if it exists
  parseNormals(NormalNode) {
    const mappingType = NormalNode.MappingInformationType;
    const referenceType = NormalNode.ReferenceInformationType;
    const buffer = NormalNode.Normals.a;
    let indexBuffer = [];
    if (referenceType === "IndexToDirect") {
      if ("NormalIndex" in NormalNode) {
        indexBuffer = NormalNode.NormalIndex.a;
      } else if ("NormalsIndex" in NormalNode) {
        indexBuffer = NormalNode.NormalsIndex.a;
      }
    }
    return {
      dataSize: 3,
      buffer,
      indices: indexBuffer,
      mappingType,
      referenceType
    };
  }
  // Parse UVs from FBXTree.Objects.Geometry.LayerElementUV if it exists
  parseUVs(UVNode) {
    const mappingType = UVNode.MappingInformationType;
    const referenceType = UVNode.ReferenceInformationType;
    const buffer = UVNode.UV.a;
    let indexBuffer = [];
    if (referenceType === "IndexToDirect") {
      indexBuffer = UVNode.UVIndex.a;
    }
    return {
      dataSize: 2,
      buffer,
      indices: indexBuffer,
      mappingType,
      referenceType
    };
  }
  // Parse Vertex Colors from FBXTree.Objects.Geometry.LayerElementColor if it exists
  parseVertexColors(ColorNode) {
    const mappingType = ColorNode.MappingInformationType;
    const referenceType = ColorNode.ReferenceInformationType;
    const buffer = ColorNode.Colors.a;
    let indexBuffer = [];
    if (referenceType === "IndexToDirect") {
      indexBuffer = ColorNode.ColorIndex.a;
    }
    for (let i = 0, c = new Color(); i < buffer.length; i += 4) {
      c.fromArray(buffer, i);
      ColorManagement.toWorkingColorSpace(c, SRGBColorSpace);
      c.toArray(buffer, i);
    }
    return {
      dataSize: 4,
      buffer,
      indices: indexBuffer,
      mappingType,
      referenceType
    };
  }
  // Parse mapping and material data in FBXTree.Objects.Geometry.LayerElementMaterial if it exists
  parseMaterialIndices(MaterialNode) {
    const mappingType = MaterialNode.MappingInformationType;
    const referenceType = MaterialNode.ReferenceInformationType;
    if (mappingType === "NoMappingInformation") {
      return {
        dataSize: 1,
        buffer: [0],
        indices: [0],
        mappingType: "AllSame",
        referenceType
      };
    }
    const materialIndexBuffer = MaterialNode.Materials.a;
    const materialIndices = [];
    for (let i = 0; i < materialIndexBuffer.length; ++i) {
      materialIndices.push(i);
    }
    return {
      dataSize: 1,
      buffer: materialIndexBuffer,
      indices: materialIndices,
      mappingType,
      referenceType
    };
  }
  // Generate a NurbGeometry from a node in FBXTree.Objects.Geometry
  parseNurbsGeometry(geoNode) {
    const order = parseInt(geoNode.Order);
    if (isNaN(order)) {
      console.error("THREE.FBXLoader: Invalid Order %s given for geometry ID: %s", geoNode.Order, geoNode.id);
      return new BufferGeometry();
    }
    const degree = order - 1;
    const knots = geoNode.KnotVector.a;
    const controlPoints = [];
    const pointsValues = geoNode.Points.a;
    for (let i = 0, l = pointsValues.length; i < l; i += 4) {
      controlPoints.push(new Vector4().fromArray(pointsValues, i));
    }
    let startKnot, endKnot;
    if (geoNode.Form === "Closed") {
      controlPoints.push(controlPoints[0]);
    } else if (geoNode.Form === "Periodic") {
      startKnot = degree;
      endKnot = knots.length - 1 - startKnot;
      for (let i = 0; i < degree; ++i) {
        controlPoints.push(controlPoints[i]);
      }
    }
    const curve = new NURBSCurve(degree, knots, controlPoints, startKnot, endKnot);
    const points = curve.getPoints(controlPoints.length * 12);
    return new BufferGeometry().setFromPoints(points);
  }
}
class AnimationParser {
  static {
    __name(this, "AnimationParser");
  }
  // take raw animation clips and turn them into three.js animation clips
  parse() {
    const animationClips = [];
    const rawClips = this.parseClips();
    if (rawClips !== void 0) {
      for (const key in rawClips) {
        const rawClip = rawClips[key];
        const clip = this.addClip(rawClip);
        animationClips.push(clip);
      }
    }
    return animationClips;
  }
  parseClips() {
    if (fbxTree.Objects.AnimationCurve === void 0) return void 0;
    const curveNodesMap = this.parseAnimationCurveNodes();
    this.parseAnimationCurves(curveNodesMap);
    const layersMap = this.parseAnimationLayers(curveNodesMap);
    const rawClips = this.parseAnimStacks(layersMap);
    return rawClips;
  }
  // parse nodes in FBXTree.Objects.AnimationCurveNode
  // each AnimationCurveNode holds data for an animation transform for a model (e.g. left arm rotation )
  // and is referenced by an AnimationLayer
  parseAnimationCurveNodes() {
    const rawCurveNodes = fbxTree.Objects.AnimationCurveNode;
    const curveNodesMap = /* @__PURE__ */ new Map();
    for (const nodeID in rawCurveNodes) {
      const rawCurveNode = rawCurveNodes[nodeID];
      if (rawCurveNode.attrName.match(/S|R|T|DeformPercent/) !== null) {
        const curveNode = {
          id: rawCurveNode.id,
          attr: rawCurveNode.attrName,
          curves: {}
        };
        curveNodesMap.set(curveNode.id, curveNode);
      }
    }
    return curveNodesMap;
  }
  // parse nodes in FBXTree.Objects.AnimationCurve and connect them up to
  // previously parsed AnimationCurveNodes. Each AnimationCurve holds data for a single animated
  // axis ( e.g. times and values of x rotation)
  parseAnimationCurves(curveNodesMap) {
    const rawCurves = fbxTree.Objects.AnimationCurve;
    for (const nodeID in rawCurves) {
      const animationCurve = {
        id: rawCurves[nodeID].id,
        times: rawCurves[nodeID].KeyTime.a.map(convertFBXTimeToSeconds),
        values: rawCurves[nodeID].KeyValueFloat.a
      };
      const relationships = connections.get(animationCurve.id);
      if (relationships !== void 0) {
        const animationCurveID = relationships.parents[0].ID;
        const animationCurveRelationship = relationships.parents[0].relationship;
        if (animationCurveRelationship.match(/X/)) {
          curveNodesMap.get(animationCurveID).curves["x"] = animationCurve;
        } else if (animationCurveRelationship.match(/Y/)) {
          curveNodesMap.get(animationCurveID).curves["y"] = animationCurve;
        } else if (animationCurveRelationship.match(/Z/)) {
          curveNodesMap.get(animationCurveID).curves["z"] = animationCurve;
        } else if (animationCurveRelationship.match(/DeformPercent/) && curveNodesMap.has(animationCurveID)) {
          curveNodesMap.get(animationCurveID).curves["morph"] = animationCurve;
        }
      }
    }
  }
  // parse nodes in FBXTree.Objects.AnimationLayer. Each layers holds references
  // to various AnimationCurveNodes and is referenced by an AnimationStack node
  // note: theoretically a stack can have multiple layers, however in practice there always seems to be one per stack
  parseAnimationLayers(curveNodesMap) {
    const rawLayers = fbxTree.Objects.AnimationLayer;
    const layersMap = /* @__PURE__ */ new Map();
    for (const nodeID in rawLayers) {
      const layerCurveNodes = [];
      const connection = connections.get(parseInt(nodeID));
      if (connection !== void 0) {
        const children = connection.children;
        children.forEach(function(child, i) {
          if (curveNodesMap.has(child.ID)) {
            const curveNode = curveNodesMap.get(child.ID);
            if (curveNode.curves.x !== void 0 || curveNode.curves.y !== void 0 || curveNode.curves.z !== void 0) {
              if (layerCurveNodes[i] === void 0) {
                const modelID = connections.get(child.ID).parents.filter(function(parent) {
                  return parent.relationship !== void 0;
                })[0].ID;
                if (modelID !== void 0) {
                  const rawModel = fbxTree.Objects.Model[modelID.toString()];
                  if (rawModel === void 0) {
                    console.warn("THREE.FBXLoader: Encountered a unused curve.", child);
                    return;
                  }
                  const node = {
                    modelName: rawModel.attrName ? PropertyBinding.sanitizeNodeName(rawModel.attrName) : "",
                    ID: rawModel.id,
                    initialPosition: [0, 0, 0],
                    initialRotation: [0, 0, 0],
                    initialScale: [1, 1, 1]
                  };
                  sceneGraph.traverse(function(child2) {
                    if (child2.ID === rawModel.id) {
                      node.transform = child2.matrix;
                      if (child2.userData.transformData) node.eulerOrder = child2.userData.transformData.eulerOrder;
                    }
                  });
                  if (!node.transform) node.transform = new Matrix4();
                  if ("PreRotation" in rawModel) node.preRotation = rawModel.PreRotation.value;
                  if ("PostRotation" in rawModel) node.postRotation = rawModel.PostRotation.value;
                  layerCurveNodes[i] = node;
                }
              }
              if (layerCurveNodes[i]) layerCurveNodes[i][curveNode.attr] = curveNode;
            } else if (curveNode.curves.morph !== void 0) {
              if (layerCurveNodes[i] === void 0) {
                const deformerID = connections.get(child.ID).parents.filter(function(parent) {
                  return parent.relationship !== void 0;
                })[0].ID;
                const morpherID = connections.get(deformerID).parents[0].ID;
                const geoID = connections.get(morpherID).parents[0].ID;
                const modelID = connections.get(geoID).parents[0].ID;
                const rawModel = fbxTree.Objects.Model[modelID];
                const node = {
                  modelName: rawModel.attrName ? PropertyBinding.sanitizeNodeName(rawModel.attrName) : "",
                  morphName: fbxTree.Objects.Deformer[deformerID].attrName
                };
                layerCurveNodes[i] = node;
              }
              layerCurveNodes[i][curveNode.attr] = curveNode;
            }
          }
        });
        layersMap.set(parseInt(nodeID), layerCurveNodes);
      }
    }
    return layersMap;
  }
  // parse nodes in FBXTree.Objects.AnimationStack. These are the top level node in the animation
  // hierarchy. Each Stack node will be used to create a AnimationClip
  parseAnimStacks(layersMap) {
    const rawStacks = fbxTree.Objects.AnimationStack;
    const rawClips = {};
    for (const nodeID in rawStacks) {
      const children = connections.get(parseInt(nodeID)).children;
      if (children.length > 1) {
        console.warn("THREE.FBXLoader: Encountered an animation stack with multiple layers, this is currently not supported. Ignoring subsequent layers.");
      }
      const layer = layersMap.get(children[0].ID);
      rawClips[nodeID] = {
        name: rawStacks[nodeID].attrName,
        layer
      };
    }
    return rawClips;
  }
  addClip(rawClip) {
    let tracks = [];
    const scope = this;
    rawClip.layer.forEach(function(rawTracks) {
      tracks = tracks.concat(scope.generateTracks(rawTracks));
    });
    return new AnimationClip(rawClip.name, -1, tracks);
  }
  generateTracks(rawTracks) {
    const tracks = [];
    let initialPosition = new Vector3();
    let initialScale = new Vector3();
    if (rawTracks.transform) rawTracks.transform.decompose(initialPosition, new Quaternion(), initialScale);
    initialPosition = initialPosition.toArray();
    initialScale = initialScale.toArray();
    if (rawTracks.T !== void 0 && Object.keys(rawTracks.T.curves).length > 0) {
      const positionTrack = this.generateVectorTrack(rawTracks.modelName, rawTracks.T.curves, initialPosition, "position");
      if (positionTrack !== void 0) tracks.push(positionTrack);
    }
    if (rawTracks.R !== void 0 && Object.keys(rawTracks.R.curves).length > 0) {
      const rotationTrack = this.generateRotationTrack(rawTracks.modelName, rawTracks.R.curves, rawTracks.preRotation, rawTracks.postRotation, rawTracks.eulerOrder);
      if (rotationTrack !== void 0) tracks.push(rotationTrack);
    }
    if (rawTracks.S !== void 0 && Object.keys(rawTracks.S.curves).length > 0) {
      const scaleTrack = this.generateVectorTrack(rawTracks.modelName, rawTracks.S.curves, initialScale, "scale");
      if (scaleTrack !== void 0) tracks.push(scaleTrack);
    }
    if (rawTracks.DeformPercent !== void 0) {
      const morphTrack = this.generateMorphTrack(rawTracks);
      if (morphTrack !== void 0) tracks.push(morphTrack);
    }
    return tracks;
  }
  generateVectorTrack(modelName, curves, initialValue, type) {
    const times = this.getTimesForAllAxes(curves);
    const values = this.getKeyframeTrackValues(times, curves, initialValue);
    return new VectorKeyframeTrack(modelName + "." + type, times, values);
  }
  generateRotationTrack(modelName, curves, preRotation, postRotation, eulerOrder) {
    let times;
    let values;
    if (curves.x !== void 0 && curves.y !== void 0 && curves.z !== void 0) {
      const result = this.interpolateRotations(curves.x, curves.y, curves.z, eulerOrder);
      times = result[0];
      values = result[1];
    }
    const defaultEulerOrder = getEulerOrder(0);
    if (preRotation !== void 0) {
      preRotation = preRotation.map(MathUtils.degToRad);
      preRotation.push(defaultEulerOrder);
      preRotation = new Euler().fromArray(preRotation);
      preRotation = new Quaternion().setFromEuler(preRotation);
    }
    if (postRotation !== void 0) {
      postRotation = postRotation.map(MathUtils.degToRad);
      postRotation.push(defaultEulerOrder);
      postRotation = new Euler().fromArray(postRotation);
      postRotation = new Quaternion().setFromEuler(postRotation).invert();
    }
    const quaternion = new Quaternion();
    const euler = new Euler();
    const quaternionValues = [];
    if (!values || !times) return new QuaternionKeyframeTrack(modelName + ".quaternion", [0], [0]);
    for (let i = 0; i < values.length; i += 3) {
      euler.set(values[i], values[i + 1], values[i + 2], eulerOrder);
      quaternion.setFromEuler(euler);
      if (preRotation !== void 0) quaternion.premultiply(preRotation);
      if (postRotation !== void 0) quaternion.multiply(postRotation);
      if (i > 2) {
        const prevQuat = new Quaternion().fromArray(
          quaternionValues,
          (i - 3) / 3 * 4
        );
        if (prevQuat.dot(quaternion) < 0) {
          quaternion.set(-quaternion.x, -quaternion.y, -quaternion.z, -quaternion.w);
        }
      }
      quaternion.toArray(quaternionValues, i / 3 * 4);
    }
    return new QuaternionKeyframeTrack(modelName + ".quaternion", times, quaternionValues);
  }
  generateMorphTrack(rawTracks) {
    const curves = rawTracks.DeformPercent.curves.morph;
    const values = curves.values.map(function(val) {
      return val / 100;
    });
    const morphNum = sceneGraph.getObjectByName(rawTracks.modelName).morphTargetDictionary[rawTracks.morphName];
    return new NumberKeyframeTrack(rawTracks.modelName + ".morphTargetInfluences[" + morphNum + "]", curves.times, values);
  }
  // For all animated objects, times are defined separately for each axis
  // Here we'll combine the times into one sorted array without duplicates
  getTimesForAllAxes(curves) {
    let times = [];
    if (curves.x !== void 0) times = times.concat(curves.x.times);
    if (curves.y !== void 0) times = times.concat(curves.y.times);
    if (curves.z !== void 0) times = times.concat(curves.z.times);
    times = times.sort(function(a, b) {
      return a - b;
    });
    if (times.length > 1) {
      let targetIndex = 1;
      let lastValue = times[0];
      for (let i = 1; i < times.length; i++) {
        const currentValue = times[i];
        if (currentValue !== lastValue) {
          times[targetIndex] = currentValue;
          lastValue = currentValue;
          targetIndex++;
        }
      }
      times = times.slice(0, targetIndex);
    }
    return times;
  }
  getKeyframeTrackValues(times, curves, initialValue) {
    const prevValue = initialValue;
    const values = [];
    let xIndex = -1;
    let yIndex = -1;
    let zIndex = -1;
    times.forEach(function(time) {
      if (curves.x) xIndex = curves.x.times.indexOf(time);
      if (curves.y) yIndex = curves.y.times.indexOf(time);
      if (curves.z) zIndex = curves.z.times.indexOf(time);
      if (xIndex !== -1) {
        const xValue = curves.x.values[xIndex];
        values.push(xValue);
        prevValue[0] = xValue;
      } else {
        values.push(prevValue[0]);
      }
      if (yIndex !== -1) {
        const yValue = curves.y.values[yIndex];
        values.push(yValue);
        prevValue[1] = yValue;
      } else {
        values.push(prevValue[1]);
      }
      if (zIndex !== -1) {
        const zValue = curves.z.values[zIndex];
        values.push(zValue);
        prevValue[2] = zValue;
      } else {
        values.push(prevValue[2]);
      }
    });
    return values;
  }
  // Rotations are defined as Euler angles which can have values  of any size
  // These will be converted to quaternions which don't support values greater than
  // PI, so we'll interpolate large rotations
  interpolateRotations(curvex, curvey, curvez, eulerOrder) {
    const times = [];
    const values = [];
    times.push(curvex.times[0]);
    values.push(MathUtils.degToRad(curvex.values[0]));
    values.push(MathUtils.degToRad(curvey.values[0]));
    values.push(MathUtils.degToRad(curvez.values[0]));
    for (let i = 1; i < curvex.values.length; i++) {
      const initialValue = [
        curvex.values[i - 1],
        curvey.values[i - 1],
        curvez.values[i - 1]
      ];
      if (isNaN(initialValue[0]) || isNaN(initialValue[1]) || isNaN(initialValue[2])) {
        continue;
      }
      const initialValueRad = initialValue.map(MathUtils.degToRad);
      const currentValue = [
        curvex.values[i],
        curvey.values[i],
        curvez.values[i]
      ];
      if (isNaN(currentValue[0]) || isNaN(currentValue[1]) || isNaN(currentValue[2])) {
        continue;
      }
      const currentValueRad = currentValue.map(MathUtils.degToRad);
      const valuesSpan = [
        currentValue[0] - initialValue[0],
        currentValue[1] - initialValue[1],
        currentValue[2] - initialValue[2]
      ];
      const absoluteSpan = [
        Math.abs(valuesSpan[0]),
        Math.abs(valuesSpan[1]),
        Math.abs(valuesSpan[2])
      ];
      if (absoluteSpan[0] >= 180 || absoluteSpan[1] >= 180 || absoluteSpan[2] >= 180) {
        const maxAbsSpan = Math.max(...absoluteSpan);
        const numSubIntervals = maxAbsSpan / 180;
        const E1 = new Euler(...initialValueRad, eulerOrder);
        const E2 = new Euler(...currentValueRad, eulerOrder);
        const Q1 = new Quaternion().setFromEuler(E1);
        const Q2 = new Quaternion().setFromEuler(E2);
        if (Q1.dot(Q2)) {
          Q2.set(-Q2.x, -Q2.y, -Q2.z, -Q2.w);
        }
        const initialTime = curvex.times[i - 1];
        const timeSpan = curvex.times[i] - initialTime;
        const Q = new Quaternion();
        const E = new Euler();
        for (let t = 0; t < 1; t += 1 / numSubIntervals) {
          Q.copy(Q1.clone().slerp(Q2.clone(), t));
          times.push(initialTime + t * timeSpan);
          E.setFromQuaternion(Q, eulerOrder);
          values.push(E.x);
          values.push(E.y);
          values.push(E.z);
        }
      } else {
        times.push(curvex.times[i]);
        values.push(MathUtils.degToRad(curvex.values[i]));
        values.push(MathUtils.degToRad(curvey.values[i]));
        values.push(MathUtils.degToRad(curvez.values[i]));
      }
    }
    return [times, values];
  }
}
class TextParser {
  static {
    __name(this, "TextParser");
  }
  getPrevNode() {
    return this.nodeStack[this.currentIndent - 2];
  }
  getCurrentNode() {
    return this.nodeStack[this.currentIndent - 1];
  }
  getCurrentProp() {
    return this.currentProp;
  }
  pushStack(node) {
    this.nodeStack.push(node);
    this.currentIndent += 1;
  }
  popStack() {
    this.nodeStack.pop();
    this.currentIndent -= 1;
  }
  setCurrentProp(val, name) {
    this.currentProp = val;
    this.currentPropName = name;
  }
  parse(text) {
    this.currentIndent = 0;
    this.allNodes = new FBXTree();
    this.nodeStack = [];
    this.currentProp = [];
    this.currentPropName = "";
    const scope = this;
    const split2 = text.split(/[\r\n]+/);
    split2.forEach(function(line, i) {
      const matchComment = line.match(/^[\s\t]*;/);
      const matchEmpty = line.match(/^[\s\t]*$/);
      if (matchComment || matchEmpty) return;
      const matchBeginning = line.match("^\\t{" + scope.currentIndent + "}(\\w+):(.*){", "");
      const matchProperty = line.match("^\\t{" + scope.currentIndent + "}(\\w+):[\\s\\t\\r\\n](.*)");
      const matchEnd = line.match("^\\t{" + (scope.currentIndent - 1) + "}}");
      if (matchBeginning) {
        scope.parseNodeBegin(line, matchBeginning);
      } else if (matchProperty) {
        scope.parseNodeProperty(line, matchProperty, split2[++i]);
      } else if (matchEnd) {
        scope.popStack();
      } else if (line.match(/^[^\s\t}]/)) {
        scope.parseNodePropertyContinued(line);
      }
    });
    return this.allNodes;
  }
  parseNodeBegin(line, property) {
    const nodeName = property[1].trim().replace(/^"/, "").replace(/"$/, "");
    const nodeAttrs = property[2].split(",").map(function(attr) {
      return attr.trim().replace(/^"/, "").replace(/"$/, "");
    });
    const node = { name: nodeName };
    const attrs = this.parseNodeAttr(nodeAttrs);
    const currentNode = this.getCurrentNode();
    if (this.currentIndent === 0) {
      this.allNodes.add(nodeName, node);
    } else {
      if (nodeName in currentNode) {
        if (nodeName === "PoseNode") {
          currentNode.PoseNode.push(node);
        } else if (currentNode[nodeName].id !== void 0) {
          currentNode[nodeName] = {};
          currentNode[nodeName][currentNode[nodeName].id] = currentNode[nodeName];
        }
        if (attrs.id !== "") currentNode[nodeName][attrs.id] = node;
      } else if (typeof attrs.id === "number") {
        currentNode[nodeName] = {};
        currentNode[nodeName][attrs.id] = node;
      } else if (nodeName !== "Properties70") {
        if (nodeName === "PoseNode") currentNode[nodeName] = [node];
        else currentNode[nodeName] = node;
      }
    }
    if (typeof attrs.id === "number") node.id = attrs.id;
    if (attrs.name !== "") node.attrName = attrs.name;
    if (attrs.type !== "") node.attrType = attrs.type;
    this.pushStack(node);
  }
  parseNodeAttr(attrs) {
    let id = attrs[0];
    if (attrs[0] !== "") {
      id = parseInt(attrs[0]);
      if (isNaN(id)) {
        id = attrs[0];
      }
    }
    let name = "", type = "";
    if (attrs.length > 1) {
      name = attrs[1].replace(/^(\w+)::/, "");
      type = attrs[2];
    }
    return { id, name, type };
  }
  parseNodeProperty(line, property, contentLine) {
    let propName = property[1].replace(/^"/, "").replace(/"$/, "").trim();
    let propValue = property[2].replace(/^"/, "").replace(/"$/, "").trim();
    if (propName === "Content" && propValue === ",") {
      propValue = contentLine.replace(/"/g, "").replace(/,$/, "").trim();
    }
    const currentNode = this.getCurrentNode();
    const parentName = currentNode.name;
    if (parentName === "Properties70") {
      this.parseNodeSpecialProperty(line, propName, propValue);
      return;
    }
    if (propName === "C") {
      const connProps = propValue.split(",").slice(1);
      const from = parseInt(connProps[0]);
      const to = parseInt(connProps[1]);
      let rest = propValue.split(",").slice(3);
      rest = rest.map(function(elem) {
        return elem.trim().replace(/^"/, "");
      });
      propName = "connections";
      propValue = [from, to];
      append(propValue, rest);
      if (currentNode[propName] === void 0) {
        currentNode[propName] = [];
      }
    }
    if (propName === "Node") currentNode.id = propValue;
    if (propName in currentNode && Array.isArray(currentNode[propName])) {
      currentNode[propName].push(propValue);
    } else {
      if (propName !== "a") currentNode[propName] = propValue;
      else currentNode.a = propValue;
    }
    this.setCurrentProp(currentNode, propName);
    if (propName === "a" && propValue.slice(-1) !== ",") {
      currentNode.a = parseNumberArray(propValue);
    }
  }
  parseNodePropertyContinued(line) {
    const currentNode = this.getCurrentNode();
    currentNode.a += line;
    if (line.slice(-1) !== ",") {
      currentNode.a = parseNumberArray(currentNode.a);
    }
  }
  // parse "Property70"
  parseNodeSpecialProperty(line, propName, propValue) {
    const props = propValue.split('",').map(function(prop) {
      return prop.trim().replace(/^\"/, "").replace(/\s/, "_");
    });
    const innerPropName = props[0];
    const innerPropType1 = props[1];
    const innerPropType2 = props[2];
    const innerPropFlag = props[3];
    let innerPropValue = props[4];
    switch (innerPropType1) {
      case "int":
      case "enum":
      case "bool":
      case "ULongLong":
      case "double":
      case "Number":
      case "FieldOfView":
        innerPropValue = parseFloat(innerPropValue);
        break;
      case "Color":
      case "ColorRGB":
      case "Vector3D":
      case "Lcl_Translation":
      case "Lcl_Rotation":
      case "Lcl_Scaling":
        innerPropValue = parseNumberArray(innerPropValue);
        break;
    }
    this.getPrevNode()[innerPropName] = {
      "type": innerPropType1,
      "type2": innerPropType2,
      "flag": innerPropFlag,
      "value": innerPropValue
    };
    this.setCurrentProp(this.getPrevNode(), innerPropName);
  }
}
class BinaryParser {
  static {
    __name(this, "BinaryParser");
  }
  parse(buffer) {
    const reader = new BinaryReader(buffer);
    reader.skip(23);
    const version = reader.getUint32();
    if (version < 6400) {
      throw new Error("THREE.FBXLoader: FBX version not supported, FileVersion: " + version);
    }
    const allNodes = new FBXTree();
    while (!this.endOfContent(reader)) {
      const node = this.parseNode(reader, version);
      if (node !== null) allNodes.add(node.name, node);
    }
    return allNodes;
  }
  // Check if reader has reached the end of content.
  endOfContent(reader) {
    if (reader.size() % 16 === 0) {
      return (reader.getOffset() + 160 + 16 & -16) >= reader.size();
    } else {
      return reader.getOffset() + 160 + 16 >= reader.size();
    }
  }
  // recursively parse nodes until the end of the file is reached
  parseNode(reader, version) {
    const node = {};
    const endOffset = version >= 7500 ? reader.getUint64() : reader.getUint32();
    const numProperties = version >= 7500 ? reader.getUint64() : reader.getUint32();
    version >= 7500 ? reader.getUint64() : reader.getUint32();
    const nameLen = reader.getUint8();
    const name = reader.getString(nameLen);
    if (endOffset === 0) return null;
    const propertyList = [];
    for (let i = 0; i < numProperties; i++) {
      propertyList.push(this.parseProperty(reader));
    }
    const id = propertyList.length > 0 ? propertyList[0] : "";
    const attrName = propertyList.length > 1 ? propertyList[1] : "";
    const attrType = propertyList.length > 2 ? propertyList[2] : "";
    node.singleProperty = numProperties === 1 && reader.getOffset() === endOffset ? true : false;
    while (endOffset > reader.getOffset()) {
      const subNode = this.parseNode(reader, version);
      if (subNode !== null) this.parseSubNode(name, node, subNode);
    }
    node.propertyList = propertyList;
    if (typeof id === "number") node.id = id;
    if (attrName !== "") node.attrName = attrName;
    if (attrType !== "") node.attrType = attrType;
    if (name !== "") node.name = name;
    return node;
  }
  parseSubNode(name, node, subNode) {
    if (subNode.singleProperty === true) {
      const value = subNode.propertyList[0];
      if (Array.isArray(value)) {
        node[subNode.name] = subNode;
        subNode.a = value;
      } else {
        node[subNode.name] = value;
      }
    } else if (name === "Connections" && subNode.name === "C") {
      const array = [];
      subNode.propertyList.forEach(function(property, i) {
        if (i !== 0) array.push(property);
      });
      if (node.connections === void 0) {
        node.connections = [];
      }
      node.connections.push(array);
    } else if (subNode.name === "Properties70") {
      const keys = Object.keys(subNode);
      keys.forEach(function(key) {
        node[key] = subNode[key];
      });
    } else if (name === "Properties70" && subNode.name === "P") {
      let innerPropName = subNode.propertyList[0];
      let innerPropType1 = subNode.propertyList[1];
      const innerPropType2 = subNode.propertyList[2];
      const innerPropFlag = subNode.propertyList[3];
      let innerPropValue;
      if (innerPropName.indexOf("Lcl ") === 0) innerPropName = innerPropName.replace("Lcl ", "Lcl_");
      if (innerPropType1.indexOf("Lcl ") === 0) innerPropType1 = innerPropType1.replace("Lcl ", "Lcl_");
      if (innerPropType1 === "Color" || innerPropType1 === "ColorRGB" || innerPropType1 === "Vector" || innerPropType1 === "Vector3D" || innerPropType1.indexOf("Lcl_") === 0) {
        innerPropValue = [
          subNode.propertyList[4],
          subNode.propertyList[5],
          subNode.propertyList[6]
        ];
      } else {
        innerPropValue = subNode.propertyList[4];
      }
      node[innerPropName] = {
        "type": innerPropType1,
        "type2": innerPropType2,
        "flag": innerPropFlag,
        "value": innerPropValue
      };
    } else if (node[subNode.name] === void 0) {
      if (typeof subNode.id === "number") {
        node[subNode.name] = {};
        node[subNode.name][subNode.id] = subNode;
      } else {
        node[subNode.name] = subNode;
      }
    } else {
      if (subNode.name === "PoseNode") {
        if (!Array.isArray(node[subNode.name])) {
          node[subNode.name] = [node[subNode.name]];
        }
        node[subNode.name].push(subNode);
      } else if (node[subNode.name][subNode.id] === void 0) {
        node[subNode.name][subNode.id] = subNode;
      }
    }
  }
  parseProperty(reader) {
    const type = reader.getString(1);
    let length;
    switch (type) {
      case "C":
        return reader.getBoolean();
      case "D":
        return reader.getFloat64();
      case "F":
        return reader.getFloat32();
      case "I":
        return reader.getInt32();
      case "L":
        return reader.getInt64();
      case "R":
        length = reader.getUint32();
        return reader.getArrayBuffer(length);
      case "S":
        length = reader.getUint32();
        return reader.getString(length);
      case "Y":
        return reader.getInt16();
      case "b":
      case "c":
      case "d":
      case "f":
      case "i":
      case "l":
        const arrayLength = reader.getUint32();
        const encoding = reader.getUint32();
        const compressedLength = reader.getUint32();
        if (encoding === 0) {
          switch (type) {
            case "b":
            case "c":
              return reader.getBooleanArray(arrayLength);
            case "d":
              return reader.getFloat64Array(arrayLength);
            case "f":
              return reader.getFloat32Array(arrayLength);
            case "i":
              return reader.getInt32Array(arrayLength);
            case "l":
              return reader.getInt64Array(arrayLength);
          }
        }
        const data = unzlibSync(new Uint8Array(reader.getArrayBuffer(compressedLength)));
        const reader2 = new BinaryReader(data.buffer);
        switch (type) {
          case "b":
          case "c":
            return reader2.getBooleanArray(arrayLength);
          case "d":
            return reader2.getFloat64Array(arrayLength);
          case "f":
            return reader2.getFloat32Array(arrayLength);
          case "i":
            return reader2.getInt32Array(arrayLength);
          case "l":
            return reader2.getInt64Array(arrayLength);
        }
        break;
      // cannot happen but is required by the DeepScan
      default:
        throw new Error("THREE.FBXLoader: Unknown property type " + type);
    }
  }
}
class BinaryReader {
  static {
    __name(this, "BinaryReader");
  }
  constructor(buffer, littleEndian) {
    this.dv = new DataView(buffer);
    this.offset = 0;
    this.littleEndian = littleEndian !== void 0 ? littleEndian : true;
    this._textDecoder = new TextDecoder();
  }
  getOffset() {
    return this.offset;
  }
  size() {
    return this.dv.buffer.byteLength;
  }
  skip(length) {
    this.offset += length;
  }
  // seems like true/false representation depends on exporter.
  // true: 1 or 'Y'(=0x59), false: 0 or 'T'(=0x54)
  // then sees LSB.
  getBoolean() {
    return (this.getUint8() & 1) === 1;
  }
  getBooleanArray(size) {
    const a = [];
    for (let i = 0; i < size; i++) {
      a.push(this.getBoolean());
    }
    return a;
  }
  getUint8() {
    const value = this.dv.getUint8(this.offset);
    this.offset += 1;
    return value;
  }
  getInt16() {
    const value = this.dv.getInt16(this.offset, this.littleEndian);
    this.offset += 2;
    return value;
  }
  getInt32() {
    const value = this.dv.getInt32(this.offset, this.littleEndian);
    this.offset += 4;
    return value;
  }
  getInt32Array(size) {
    const a = [];
    for (let i = 0; i < size; i++) {
      a.push(this.getInt32());
    }
    return a;
  }
  getUint32() {
    const value = this.dv.getUint32(this.offset, this.littleEndian);
    this.offset += 4;
    return value;
  }
  // JavaScript doesn't support 64-bit integer so calculate this here
  // 1 << 32 will return 1 so using multiply operation instead here.
  // There's a possibility that this method returns wrong value if the value
  // is out of the range between Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER.
  // TODO: safely handle 64-bit integer
  getInt64() {
    let low, high;
    if (this.littleEndian) {
      low = this.getUint32();
      high = this.getUint32();
    } else {
      high = this.getUint32();
      low = this.getUint32();
    }
    if (high & 2147483648) {
      high = ~high & 4294967295;
      low = ~low & 4294967295;
      if (low === 4294967295) high = high + 1 & 4294967295;
      low = low + 1 & 4294967295;
      return -(high * 4294967296 + low);
    }
    return high * 4294967296 + low;
  }
  getInt64Array(size) {
    const a = [];
    for (let i = 0; i < size; i++) {
      a.push(this.getInt64());
    }
    return a;
  }
  // Note: see getInt64() comment
  getUint64() {
    let low, high;
    if (this.littleEndian) {
      low = this.getUint32();
      high = this.getUint32();
    } else {
      high = this.getUint32();
      low = this.getUint32();
    }
    return high * 4294967296 + low;
  }
  getFloat32() {
    const value = this.dv.getFloat32(this.offset, this.littleEndian);
    this.offset += 4;
    return value;
  }
  getFloat32Array(size) {
    const a = [];
    for (let i = 0; i < size; i++) {
      a.push(this.getFloat32());
    }
    return a;
  }
  getFloat64() {
    const value = this.dv.getFloat64(this.offset, this.littleEndian);
    this.offset += 8;
    return value;
  }
  getFloat64Array(size) {
    const a = [];
    for (let i = 0; i < size; i++) {
      a.push(this.getFloat64());
    }
    return a;
  }
  getArrayBuffer(size) {
    const value = this.dv.buffer.slice(this.offset, this.offset + size);
    this.offset += size;
    return value;
  }
  getString(size) {
    const start = this.offset;
    let a = new Uint8Array(this.dv.buffer, start, size);
    this.skip(size);
    const nullByte = a.indexOf(0);
    if (nullByte >= 0) a = new Uint8Array(this.dv.buffer, start, nullByte);
    return this._textDecoder.decode(a);
  }
}
class FBXTree {
  static {
    __name(this, "FBXTree");
  }
  add(key, val) {
    this[key] = val;
  }
}
function isFbxFormatBinary(buffer) {
  const CORRECT = "Kaydara FBX Binary  \0";
  return buffer.byteLength >= CORRECT.length && CORRECT === convertArrayBufferToString(buffer, 0, CORRECT.length);
}
__name(isFbxFormatBinary, "isFbxFormatBinary");
function isFbxFormatASCII(text) {
  const CORRECT = ["K", "a", "y", "d", "a", "r", "a", "\\", "F", "B", "X", "\\", "B", "i", "n", "a", "r", "y", "\\", "\\"];
  let cursor = 0;
  function read(offset) {
    const result = text[offset - 1];
    text = text.slice(cursor + offset);
    cursor++;
    return result;
  }
  __name(read, "read");
  for (let i = 0; i < CORRECT.length; ++i) {
    const num = read(1);
    if (num === CORRECT[i]) {
      return false;
    }
  }
  return true;
}
__name(isFbxFormatASCII, "isFbxFormatASCII");
function getFbxVersion(text) {
  const versionRegExp = /FBXVersion: (\d+)/;
  const match = text.match(versionRegExp);
  if (match) {
    const version = parseInt(match[1]);
    return version;
  }
  throw new Error("THREE.FBXLoader: Cannot find the version number for the file given.");
}
__name(getFbxVersion, "getFbxVersion");
function convertFBXTimeToSeconds(time) {
  return time / 46186158e3;
}
__name(convertFBXTimeToSeconds, "convertFBXTimeToSeconds");
const dataArray = [];
function getData(polygonVertexIndex, polygonIndex, vertexIndex, infoObject) {
  let index;
  switch (infoObject.mappingType) {
    case "ByPolygonVertex":
      index = polygonVertexIndex;
      break;
    case "ByPolygon":
      index = polygonIndex;
      break;
    case "ByVertice":
      index = vertexIndex;
      break;
    case "AllSame":
      index = infoObject.indices[0];
      break;
    default:
      console.warn("THREE.FBXLoader: unknown attribute mapping type " + infoObject.mappingType);
  }
  if (infoObject.referenceType === "IndexToDirect") index = infoObject.indices[index];
  const from = index * infoObject.dataSize;
  const to = from + infoObject.dataSize;
  return slice(dataArray, infoObject.buffer, from, to);
}
__name(getData, "getData");
const tempEuler = new Euler();
const tempVec = new Vector3();
function generateTransform(transformData) {
  const lTranslationM = new Matrix4();
  const lPreRotationM = new Matrix4();
  const lRotationM = new Matrix4();
  const lPostRotationM = new Matrix4();
  const lScalingM = new Matrix4();
  const lScalingPivotM = new Matrix4();
  const lScalingOffsetM = new Matrix4();
  const lRotationOffsetM = new Matrix4();
  const lRotationPivotM = new Matrix4();
  const lParentGX = new Matrix4();
  const lParentLX = new Matrix4();
  const lGlobalT = new Matrix4();
  const inheritType = transformData.inheritType ? transformData.inheritType : 0;
  if (transformData.translation) lTranslationM.setPosition(tempVec.fromArray(transformData.translation));
  const defaultEulerOrder = getEulerOrder(0);
  if (transformData.preRotation) {
    const array = transformData.preRotation.map(MathUtils.degToRad);
    array.push(defaultEulerOrder);
    lPreRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
  }
  if (transformData.rotation) {
    const array = transformData.rotation.map(MathUtils.degToRad);
    array.push(transformData.eulerOrder || defaultEulerOrder);
    lRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
  }
  if (transformData.postRotation) {
    const array = transformData.postRotation.map(MathUtils.degToRad);
    array.push(defaultEulerOrder);
    lPostRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
    lPostRotationM.invert();
  }
  if (transformData.scale) lScalingM.scale(tempVec.fromArray(transformData.scale));
  if (transformData.scalingOffset) lScalingOffsetM.setPosition(tempVec.fromArray(transformData.scalingOffset));
  if (transformData.scalingPivot) lScalingPivotM.setPosition(tempVec.fromArray(transformData.scalingPivot));
  if (transformData.rotationOffset) lRotationOffsetM.setPosition(tempVec.fromArray(transformData.rotationOffset));
  if (transformData.rotationPivot) lRotationPivotM.setPosition(tempVec.fromArray(transformData.rotationPivot));
  if (transformData.parentMatrixWorld) {
    lParentLX.copy(transformData.parentMatrix);
    lParentGX.copy(transformData.parentMatrixWorld);
  }
  const lLRM = lPreRotationM.clone().multiply(lRotationM).multiply(lPostRotationM);
  const lParentGRM = new Matrix4();
  lParentGRM.extractRotation(lParentGX);
  const lParentTM = new Matrix4();
  lParentTM.copyPosition(lParentGX);
  const lParentGRSM = lParentTM.clone().invert().multiply(lParentGX);
  const lParentGSM = lParentGRM.clone().invert().multiply(lParentGRSM);
  const lLSM = lScalingM;
  const lGlobalRS = new Matrix4();
  if (inheritType === 0) {
    lGlobalRS.copy(lParentGRM).multiply(lLRM).multiply(lParentGSM).multiply(lLSM);
  } else if (inheritType === 1) {
    lGlobalRS.copy(lParentGRM).multiply(lParentGSM).multiply(lLRM).multiply(lLSM);
  } else {
    const lParentLSM = new Matrix4().scale(new Vector3().setFromMatrixScale(lParentLX));
    const lParentLSM_inv = lParentLSM.clone().invert();
    const lParentGSM_noLocal = lParentGSM.clone().multiply(lParentLSM_inv);
    lGlobalRS.copy(lParentGRM).multiply(lLRM).multiply(lParentGSM_noLocal).multiply(lLSM);
  }
  const lRotationPivotM_inv = lRotationPivotM.clone().invert();
  const lScalingPivotM_inv = lScalingPivotM.clone().invert();
  let lTransform = lTranslationM.clone().multiply(lRotationOffsetM).multiply(lRotationPivotM).multiply(lPreRotationM).multiply(lRotationM).multiply(lPostRotationM).multiply(lRotationPivotM_inv).multiply(lScalingOffsetM).multiply(lScalingPivotM).multiply(lScalingM).multiply(lScalingPivotM_inv);
  const lLocalTWithAllPivotAndOffsetInfo = new Matrix4().copyPosition(lTransform);
  const lGlobalTranslation = lParentGX.clone().multiply(lLocalTWithAllPivotAndOffsetInfo);
  lGlobalT.copyPosition(lGlobalTranslation);
  lTransform = lGlobalT.clone().multiply(lGlobalRS);
  lTransform.premultiply(lParentGX.invert());
  return lTransform;
}
__name(generateTransform, "generateTransform");
function getEulerOrder(order) {
  order = order || 0;
  const enums = [
    "ZYX",
    // -> XYZ extrinsic
    "YZX",
    // -> XZY extrinsic
    "XZY",
    // -> YZX extrinsic
    "ZXY",
    // -> YXZ extrinsic
    "YXZ",
    // -> ZXY extrinsic
    "XYZ"
    // -> ZYX extrinsic
    //'SphericXYZ', // not possible to support
  ];
  if (order === 6) {
    console.warn("THREE.FBXLoader: unsupported Euler Order: Spherical XYZ. Animations and rotations may be incorrect.");
    return enums[0];
  }
  return enums[order];
}
__name(getEulerOrder, "getEulerOrder");
function parseNumberArray(value) {
  const array = value.split(",").map(function(val) {
    return parseFloat(val);
  });
  return array;
}
__name(parseNumberArray, "parseNumberArray");
function convertArrayBufferToString(buffer, from, to) {
  if (from === void 0) from = 0;
  if (to === void 0) to = buffer.byteLength;
  return new TextDecoder().decode(new Uint8Array(buffer, from, to));
}
__name(convertArrayBufferToString, "convertArrayBufferToString");
function append(a, b) {
  for (let i = 0, j = a.length, l = b.length; i < l; i++, j++) {
    a[j] = b[i];
  }
}
__name(append, "append");
function slice(a, b, from, to) {
  for (let i = from, j = 0; i < to; i++, j++) {
    a[j] = b[i];
  }
  return a;
}
__name(slice, "slice");
function toTrianglesDrawMode(geometry, drawMode) {
  if (drawMode === TrianglesDrawMode) {
    console.warn("THREE.BufferGeometryUtils.toTrianglesDrawMode(): Geometry already defined as triangles.");
    return geometry;
  }
  if (drawMode === TriangleFanDrawMode || drawMode === TriangleStripDrawMode) {
    let index = geometry.getIndex();
    if (index === null) {
      const indices = [];
      const position = geometry.getAttribute("position");
      if (position !== void 0) {
        for (let i = 0; i < position.count; i++) {
          indices.push(i);
        }
        geometry.setIndex(indices);
        index = geometry.getIndex();
      } else {
        console.error("THREE.BufferGeometryUtils.toTrianglesDrawMode(): Undefined position attribute. Processing not possible.");
        return geometry;
      }
    }
    const numberOfTriangles = index.count - 2;
    const newIndices = [];
    if (drawMode === TriangleFanDrawMode) {
      for (let i = 1; i <= numberOfTriangles; i++) {
        newIndices.push(index.getX(0));
        newIndices.push(index.getX(i));
        newIndices.push(index.getX(i + 1));
      }
    } else {
      for (let i = 0; i < numberOfTriangles; i++) {
        if (i % 2 === 0) {
          newIndices.push(index.getX(i));
          newIndices.push(index.getX(i + 1));
          newIndices.push(index.getX(i + 2));
        } else {
          newIndices.push(index.getX(i + 2));
          newIndices.push(index.getX(i + 1));
          newIndices.push(index.getX(i));
        }
      }
    }
    if (newIndices.length / 3 !== numberOfTriangles) {
      console.error("THREE.BufferGeometryUtils.toTrianglesDrawMode(): Unable to generate correct amount of triangles.");
    }
    const newGeometry = geometry.clone();
    newGeometry.setIndex(newIndices);
    newGeometry.clearGroups();
    return newGeometry;
  } else {
    console.error("THREE.BufferGeometryUtils.toTrianglesDrawMode(): Unknown draw mode:", drawMode);
    return geometry;
  }
}
__name(toTrianglesDrawMode, "toTrianglesDrawMode");
class GLTFLoader extends Loader {
  static {
    __name(this, "GLTFLoader");
  }
  constructor(manager) {
    super(manager);
    this.dracoLoader = null;
    this.ktx2Loader = null;
    this.meshoptDecoder = null;
    this.pluginCallbacks = [];
    this.register(function(parser) {
      return new GLTFMaterialsClearcoatExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFMaterialsDispersionExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFTextureBasisUExtension(parser);
    });
    this.register(function(parser) {
      return new GLTFTextureWebPExtension(parser);
    });
    this.register(function(parser) {
      return new GLTFTextureAVIFExtension(parser);
    });
    this.register(function(parser) {
      return new GLTFMaterialsSheenExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFMaterialsTransmissionExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFMaterialsVolumeExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFMaterialsIorExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFMaterialsEmissiveStrengthExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFMaterialsSpecularExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFMaterialsIridescenceExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFMaterialsAnisotropyExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFMaterialsBumpExtension$1(parser);
    });
    this.register(function(parser) {
      return new GLTFLightsExtension(parser);
    });
    this.register(function(parser) {
      return new GLTFMeshoptCompression(parser);
    });
    this.register(function(parser) {
      return new GLTFMeshGpuInstancing$1(parser);
    });
  }
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    let resourcePath;
    if (this.resourcePath !== "") {
      resourcePath = this.resourcePath;
    } else if (this.path !== "") {
      const relativeUrl = LoaderUtils.extractUrlBase(url);
      resourcePath = LoaderUtils.resolveURL(relativeUrl, this.path);
    } else {
      resourcePath = LoaderUtils.extractUrlBase(url);
    }
    this.manager.itemStart(url);
    const _onError = /* @__PURE__ */ __name(function(e) {
      if (onError) {
        onError(e);
      } else {
        console.error(e);
      }
      scope.manager.itemError(url);
      scope.manager.itemEnd(url);
    }, "_onError");
    const loader = new FileLoader(this.manager);
    loader.setPath(this.path);
    loader.setResponseType("arraybuffer");
    loader.setRequestHeader(this.requestHeader);
    loader.setWithCredentials(this.withCredentials);
    loader.load(url, function(data) {
      try {
        scope.parse(data, resourcePath, function(gltf) {
          onLoad(gltf);
          scope.manager.itemEnd(url);
        }, _onError);
      } catch (e) {
        _onError(e);
      }
    }, onProgress, _onError);
  }
  setDRACOLoader(dracoLoader) {
    this.dracoLoader = dracoLoader;
    return this;
  }
  setKTX2Loader(ktx2Loader) {
    this.ktx2Loader = ktx2Loader;
    return this;
  }
  setMeshoptDecoder(meshoptDecoder) {
    this.meshoptDecoder = meshoptDecoder;
    return this;
  }
  register(callback) {
    if (this.pluginCallbacks.indexOf(callback) === -1) {
      this.pluginCallbacks.push(callback);
    }
    return this;
  }
  unregister(callback) {
    if (this.pluginCallbacks.indexOf(callback) !== -1) {
      this.pluginCallbacks.splice(this.pluginCallbacks.indexOf(callback), 1);
    }
    return this;
  }
  parse(data, path, onLoad, onError) {
    let json;
    const extensions = {};
    const plugins = {};
    const textDecoder = new TextDecoder();
    if (typeof data === "string") {
      json = JSON.parse(data);
    } else if (data instanceof ArrayBuffer) {
      const magic = textDecoder.decode(new Uint8Array(data, 0, 4));
      if (magic === BINARY_EXTENSION_HEADER_MAGIC) {
        try {
          extensions[EXTENSIONS.KHR_BINARY_GLTF] = new GLTFBinaryExtension(data);
        } catch (error) {
          if (onError) onError(error);
          return;
        }
        json = JSON.parse(extensions[EXTENSIONS.KHR_BINARY_GLTF].content);
      } else {
        json = JSON.parse(textDecoder.decode(data));
      }
    } else {
      json = data;
    }
    if (json.asset === void 0 || json.asset.version[0] < 2) {
      if (onError) onError(new Error("THREE.GLTFLoader: Unsupported asset. glTF versions >=2.0 are supported."));
      return;
    }
    const parser = new GLTFParser(json, {
      path: path || this.resourcePath || "",
      crossOrigin: this.crossOrigin,
      requestHeader: this.requestHeader,
      manager: this.manager,
      ktx2Loader: this.ktx2Loader,
      meshoptDecoder: this.meshoptDecoder
    });
    parser.fileLoader.setRequestHeader(this.requestHeader);
    for (let i = 0; i < this.pluginCallbacks.length; i++) {
      const plugin = this.pluginCallbacks[i](parser);
      if (!plugin.name) console.error("THREE.GLTFLoader: Invalid plugin found: missing name");
      plugins[plugin.name] = plugin;
      extensions[plugin.name] = true;
    }
    if (json.extensionsUsed) {
      for (let i = 0; i < json.extensionsUsed.length; ++i) {
        const extensionName = json.extensionsUsed[i];
        const extensionsRequired = json.extensionsRequired || [];
        switch (extensionName) {
          case EXTENSIONS.KHR_MATERIALS_UNLIT:
            extensions[extensionName] = new GLTFMaterialsUnlitExtension$1();
            break;
          case EXTENSIONS.KHR_DRACO_MESH_COMPRESSION:
            extensions[extensionName] = new GLTFDracoMeshCompressionExtension(json, this.dracoLoader);
            break;
          case EXTENSIONS.KHR_TEXTURE_TRANSFORM:
            extensions[extensionName] = new GLTFTextureTransformExtension();
            break;
          case EXTENSIONS.KHR_MESH_QUANTIZATION:
            extensions[extensionName] = new GLTFMeshQuantizationExtension();
            break;
          default:
            if (extensionsRequired.indexOf(extensionName) >= 0 && plugins[extensionName] === void 0) {
              console.warn('THREE.GLTFLoader: Unknown extension "' + extensionName + '".');
            }
        }
      }
    }
    parser.setExtensions(extensions);
    parser.setPlugins(plugins);
    parser.parse(onLoad, onError);
  }
  parseAsync(data, path) {
    const scope = this;
    return new Promise(function(resolve, reject) {
      scope.parse(data, path, resolve, reject);
    });
  }
}
function GLTFRegistry() {
  let objects = {};
  return {
    get: /* @__PURE__ */ __name(function(key) {
      return objects[key];
    }, "get"),
    add: /* @__PURE__ */ __name(function(key, object) {
      objects[key] = object;
    }, "add"),
    remove: /* @__PURE__ */ __name(function(key) {
      delete objects[key];
    }, "remove"),
    removeAll: /* @__PURE__ */ __name(function() {
      objects = {};
    }, "removeAll")
  };
}
__name(GLTFRegistry, "GLTFRegistry");
const EXTENSIONS = {
  KHR_BINARY_GLTF: "KHR_binary_glTF",
  KHR_DRACO_MESH_COMPRESSION: "KHR_draco_mesh_compression",
  KHR_LIGHTS_PUNCTUAL: "KHR_lights_punctual",
  KHR_MATERIALS_CLEARCOAT: "KHR_materials_clearcoat",
  KHR_MATERIALS_DISPERSION: "KHR_materials_dispersion",
  KHR_MATERIALS_IOR: "KHR_materials_ior",
  KHR_MATERIALS_SHEEN: "KHR_materials_sheen",
  KHR_MATERIALS_SPECULAR: "KHR_materials_specular",
  KHR_MATERIALS_TRANSMISSION: "KHR_materials_transmission",
  KHR_MATERIALS_IRIDESCENCE: "KHR_materials_iridescence",
  KHR_MATERIALS_ANISOTROPY: "KHR_materials_anisotropy",
  KHR_MATERIALS_UNLIT: "KHR_materials_unlit",
  KHR_MATERIALS_VOLUME: "KHR_materials_volume",
  KHR_TEXTURE_BASISU: "KHR_texture_basisu",
  KHR_TEXTURE_TRANSFORM: "KHR_texture_transform",
  KHR_MESH_QUANTIZATION: "KHR_mesh_quantization",
  KHR_MATERIALS_EMISSIVE_STRENGTH: "KHR_materials_emissive_strength",
  EXT_MATERIALS_BUMP: "EXT_materials_bump",
  EXT_TEXTURE_WEBP: "EXT_texture_webp",
  EXT_TEXTURE_AVIF: "EXT_texture_avif",
  EXT_MESHOPT_COMPRESSION: "EXT_meshopt_compression",
  EXT_MESH_GPU_INSTANCING: "EXT_mesh_gpu_instancing"
};
class GLTFLightsExtension {
  static {
    __name(this, "GLTFLightsExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_LIGHTS_PUNCTUAL;
    this.cache = { refs: {}, uses: {} };
  }
  _markDefs() {
    const parser = this.parser;
    const nodeDefs = this.parser.json.nodes || [];
    for (let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex++) {
      const nodeDef = nodeDefs[nodeIndex];
      if (nodeDef.extensions && nodeDef.extensions[this.name] && nodeDef.extensions[this.name].light !== void 0) {
        parser._addNodeRef(this.cache, nodeDef.extensions[this.name].light);
      }
    }
  }
  _loadLight(lightIndex) {
    const parser = this.parser;
    const cacheKey = "light:" + lightIndex;
    let dependency = parser.cache.get(cacheKey);
    if (dependency) return dependency;
    const json = parser.json;
    const extensions = json.extensions && json.extensions[this.name] || {};
    const lightDefs = extensions.lights || [];
    const lightDef = lightDefs[lightIndex];
    let lightNode;
    const color = new Color(16777215);
    if (lightDef.color !== void 0) color.setRGB(lightDef.color[0], lightDef.color[1], lightDef.color[2], LinearSRGBColorSpace);
    const range = lightDef.range !== void 0 ? lightDef.range : 0;
    switch (lightDef.type) {
      case "directional":
        lightNode = new DirectionalLight(color);
        lightNode.target.position.set(0, 0, -1);
        lightNode.add(lightNode.target);
        break;
      case "point":
        lightNode = new PointLight(color);
        lightNode.distance = range;
        break;
      case "spot":
        lightNode = new SpotLight(color);
        lightNode.distance = range;
        lightDef.spot = lightDef.spot || {};
        lightDef.spot.innerConeAngle = lightDef.spot.innerConeAngle !== void 0 ? lightDef.spot.innerConeAngle : 0;
        lightDef.spot.outerConeAngle = lightDef.spot.outerConeAngle !== void 0 ? lightDef.spot.outerConeAngle : Math.PI / 4;
        lightNode.angle = lightDef.spot.outerConeAngle;
        lightNode.penumbra = 1 - lightDef.spot.innerConeAngle / lightDef.spot.outerConeAngle;
        lightNode.target.position.set(0, 0, -1);
        lightNode.add(lightNode.target);
        break;
      default:
        throw new Error("THREE.GLTFLoader: Unexpected light type: " + lightDef.type);
    }
    lightNode.position.set(0, 0, 0);
    lightNode.decay = 2;
    assignExtrasToUserData(lightNode, lightDef);
    if (lightDef.intensity !== void 0) lightNode.intensity = lightDef.intensity;
    lightNode.name = parser.createUniqueName(lightDef.name || "light_" + lightIndex);
    dependency = Promise.resolve(lightNode);
    parser.cache.add(cacheKey, dependency);
    return dependency;
  }
  getDependency(type, index) {
    if (type !== "light") return;
    return this._loadLight(index);
  }
  createNodeAttachment(nodeIndex) {
    const self2 = this;
    const parser = this.parser;
    const json = parser.json;
    const nodeDef = json.nodes[nodeIndex];
    const lightDef = nodeDef.extensions && nodeDef.extensions[this.name] || {};
    const lightIndex = lightDef.light;
    if (lightIndex === void 0) return null;
    return this._loadLight(lightIndex).then(function(light) {
      return parser._getNodeRef(self2.cache, lightIndex, light);
    });
  }
}
let GLTFMaterialsUnlitExtension$1 = class GLTFMaterialsUnlitExtension {
  static {
    __name(this, "GLTFMaterialsUnlitExtension");
  }
  constructor() {
    this.name = EXTENSIONS.KHR_MATERIALS_UNLIT;
  }
  getMaterialType() {
    return MeshBasicMaterial;
  }
  extendParams(materialParams, materialDef, parser) {
    const pending = [];
    materialParams.color = new Color(1, 1, 1);
    materialParams.opacity = 1;
    const metallicRoughness = materialDef.pbrMetallicRoughness;
    if (metallicRoughness) {
      if (Array.isArray(metallicRoughness.baseColorFactor)) {
        const array = metallicRoughness.baseColorFactor;
        materialParams.color.setRGB(array[0], array[1], array[2], LinearSRGBColorSpace);
        materialParams.opacity = array[3];
      }
      if (metallicRoughness.baseColorTexture !== void 0) {
        pending.push(parser.assignTexture(materialParams, "map", metallicRoughness.baseColorTexture, SRGBColorSpace));
      }
    }
    return Promise.all(pending);
  }
};
let GLTFMaterialsEmissiveStrengthExtension$1 = class GLTFMaterialsEmissiveStrengthExtension {
  static {
    __name(this, "GLTFMaterialsEmissiveStrengthExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_MATERIALS_EMISSIVE_STRENGTH;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const emissiveStrength = materialDef.extensions[this.name].emissiveStrength;
    if (emissiveStrength !== void 0) {
      materialParams.emissiveIntensity = emissiveStrength;
    }
    return Promise.resolve();
  }
};
let GLTFMaterialsClearcoatExtension$1 = class GLTFMaterialsClearcoatExtension {
  static {
    __name(this, "GLTFMaterialsClearcoatExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_MATERIALS_CLEARCOAT;
  }
  getMaterialType(materialIndex) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) return null;
    return MeshPhysicalMaterial;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const pending = [];
    const extension = materialDef.extensions[this.name];
    if (extension.clearcoatFactor !== void 0) {
      materialParams.clearcoat = extension.clearcoatFactor;
    }
    if (extension.clearcoatTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "clearcoatMap", extension.clearcoatTexture));
    }
    if (extension.clearcoatRoughnessFactor !== void 0) {
      materialParams.clearcoatRoughness = extension.clearcoatRoughnessFactor;
    }
    if (extension.clearcoatRoughnessTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "clearcoatRoughnessMap", extension.clearcoatRoughnessTexture));
    }
    if (extension.clearcoatNormalTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "clearcoatNormalMap", extension.clearcoatNormalTexture));
      if (extension.clearcoatNormalTexture.scale !== void 0) {
        const scale = extension.clearcoatNormalTexture.scale;
        materialParams.clearcoatNormalScale = new Vector2(scale, scale);
      }
    }
    return Promise.all(pending);
  }
};
let GLTFMaterialsDispersionExtension$1 = class GLTFMaterialsDispersionExtension {
  static {
    __name(this, "GLTFMaterialsDispersionExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_MATERIALS_DISPERSION;
  }
  getMaterialType(materialIndex) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) return null;
    return MeshPhysicalMaterial;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const extension = materialDef.extensions[this.name];
    materialParams.dispersion = extension.dispersion !== void 0 ? extension.dispersion : 0;
    return Promise.resolve();
  }
};
let GLTFMaterialsIridescenceExtension$1 = class GLTFMaterialsIridescenceExtension {
  static {
    __name(this, "GLTFMaterialsIridescenceExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_MATERIALS_IRIDESCENCE;
  }
  getMaterialType(materialIndex) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) return null;
    return MeshPhysicalMaterial;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const pending = [];
    const extension = materialDef.extensions[this.name];
    if (extension.iridescenceFactor !== void 0) {
      materialParams.iridescence = extension.iridescenceFactor;
    }
    if (extension.iridescenceTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "iridescenceMap", extension.iridescenceTexture));
    }
    if (extension.iridescenceIor !== void 0) {
      materialParams.iridescenceIOR = extension.iridescenceIor;
    }
    if (materialParams.iridescenceThicknessRange === void 0) {
      materialParams.iridescenceThicknessRange = [100, 400];
    }
    if (extension.iridescenceThicknessMinimum !== void 0) {
      materialParams.iridescenceThicknessRange[0] = extension.iridescenceThicknessMinimum;
    }
    if (extension.iridescenceThicknessMaximum !== void 0) {
      materialParams.iridescenceThicknessRange[1] = extension.iridescenceThicknessMaximum;
    }
    if (extension.iridescenceThicknessTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "iridescenceThicknessMap", extension.iridescenceThicknessTexture));
    }
    return Promise.all(pending);
  }
};
let GLTFMaterialsSheenExtension$1 = class GLTFMaterialsSheenExtension {
  static {
    __name(this, "GLTFMaterialsSheenExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_MATERIALS_SHEEN;
  }
  getMaterialType(materialIndex) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) return null;
    return MeshPhysicalMaterial;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const pending = [];
    materialParams.sheenColor = new Color(0, 0, 0);
    materialParams.sheenRoughness = 0;
    materialParams.sheen = 1;
    const extension = materialDef.extensions[this.name];
    if (extension.sheenColorFactor !== void 0) {
      const colorFactor = extension.sheenColorFactor;
      materialParams.sheenColor.setRGB(colorFactor[0], colorFactor[1], colorFactor[2], LinearSRGBColorSpace);
    }
    if (extension.sheenRoughnessFactor !== void 0) {
      materialParams.sheenRoughness = extension.sheenRoughnessFactor;
    }
    if (extension.sheenColorTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "sheenColorMap", extension.sheenColorTexture, SRGBColorSpace));
    }
    if (extension.sheenRoughnessTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "sheenRoughnessMap", extension.sheenRoughnessTexture));
    }
    return Promise.all(pending);
  }
};
let GLTFMaterialsTransmissionExtension$1 = class GLTFMaterialsTransmissionExtension {
  static {
    __name(this, "GLTFMaterialsTransmissionExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_MATERIALS_TRANSMISSION;
  }
  getMaterialType(materialIndex) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) return null;
    return MeshPhysicalMaterial;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const pending = [];
    const extension = materialDef.extensions[this.name];
    if (extension.transmissionFactor !== void 0) {
      materialParams.transmission = extension.transmissionFactor;
    }
    if (extension.transmissionTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "transmissionMap", extension.transmissionTexture));
    }
    return Promise.all(pending);
  }
};
let GLTFMaterialsVolumeExtension$1 = class GLTFMaterialsVolumeExtension {
  static {
    __name(this, "GLTFMaterialsVolumeExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_MATERIALS_VOLUME;
  }
  getMaterialType(materialIndex) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) return null;
    return MeshPhysicalMaterial;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const pending = [];
    const extension = materialDef.extensions[this.name];
    materialParams.thickness = extension.thicknessFactor !== void 0 ? extension.thicknessFactor : 0;
    if (extension.thicknessTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "thicknessMap", extension.thicknessTexture));
    }
    materialParams.attenuationDistance = extension.attenuationDistance || Infinity;
    const colorArray = extension.attenuationColor || [1, 1, 1];
    materialParams.attenuationColor = new Color().setRGB(colorArray[0], colorArray[1], colorArray[2], LinearSRGBColorSpace);
    return Promise.all(pending);
  }
};
let GLTFMaterialsIorExtension$1 = class GLTFMaterialsIorExtension {
  static {
    __name(this, "GLTFMaterialsIorExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_MATERIALS_IOR;
  }
  getMaterialType(materialIndex) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) return null;
    return MeshPhysicalMaterial;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const extension = materialDef.extensions[this.name];
    materialParams.ior = extension.ior !== void 0 ? extension.ior : 1.5;
    return Promise.resolve();
  }
};
let GLTFMaterialsSpecularExtension$1 = class GLTFMaterialsSpecularExtension {
  static {
    __name(this, "GLTFMaterialsSpecularExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_MATERIALS_SPECULAR;
  }
  getMaterialType(materialIndex) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) return null;
    return MeshPhysicalMaterial;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const pending = [];
    const extension = materialDef.extensions[this.name];
    materialParams.specularIntensity = extension.specularFactor !== void 0 ? extension.specularFactor : 1;
    if (extension.specularTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "specularIntensityMap", extension.specularTexture));
    }
    const colorArray = extension.specularColorFactor || [1, 1, 1];
    materialParams.specularColor = new Color().setRGB(colorArray[0], colorArray[1], colorArray[2], LinearSRGBColorSpace);
    if (extension.specularColorTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "specularColorMap", extension.specularColorTexture, SRGBColorSpace));
    }
    return Promise.all(pending);
  }
};
let GLTFMaterialsBumpExtension$1 = class GLTFMaterialsBumpExtension {
  static {
    __name(this, "GLTFMaterialsBumpExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.EXT_MATERIALS_BUMP;
  }
  getMaterialType(materialIndex) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) return null;
    return MeshPhysicalMaterial;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const pending = [];
    const extension = materialDef.extensions[this.name];
    materialParams.bumpScale = extension.bumpFactor !== void 0 ? extension.bumpFactor : 1;
    if (extension.bumpTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "bumpMap", extension.bumpTexture));
    }
    return Promise.all(pending);
  }
};
let GLTFMaterialsAnisotropyExtension$1 = class GLTFMaterialsAnisotropyExtension {
  static {
    __name(this, "GLTFMaterialsAnisotropyExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_MATERIALS_ANISOTROPY;
  }
  getMaterialType(materialIndex) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) return null;
    return MeshPhysicalMaterial;
  }
  extendMaterialParams(materialIndex, materialParams) {
    const parser = this.parser;
    const materialDef = parser.json.materials[materialIndex];
    if (!materialDef.extensions || !materialDef.extensions[this.name]) {
      return Promise.resolve();
    }
    const pending = [];
    const extension = materialDef.extensions[this.name];
    if (extension.anisotropyStrength !== void 0) {
      materialParams.anisotropy = extension.anisotropyStrength;
    }
    if (extension.anisotropyRotation !== void 0) {
      materialParams.anisotropyRotation = extension.anisotropyRotation;
    }
    if (extension.anisotropyTexture !== void 0) {
      pending.push(parser.assignTexture(materialParams, "anisotropyMap", extension.anisotropyTexture));
    }
    return Promise.all(pending);
  }
};
class GLTFTextureBasisUExtension {
  static {
    __name(this, "GLTFTextureBasisUExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.KHR_TEXTURE_BASISU;
  }
  loadTexture(textureIndex) {
    const parser = this.parser;
    const json = parser.json;
    const textureDef = json.textures[textureIndex];
    if (!textureDef.extensions || !textureDef.extensions[this.name]) {
      return null;
    }
    const extension = textureDef.extensions[this.name];
    const loader = parser.options.ktx2Loader;
    if (!loader) {
      if (json.extensionsRequired && json.extensionsRequired.indexOf(this.name) >= 0) {
        throw new Error("THREE.GLTFLoader: setKTX2Loader must be called before loading KTX2 textures");
      } else {
        return null;
      }
    }
    return parser.loadTextureImage(textureIndex, extension.source, loader);
  }
}
class GLTFTextureWebPExtension {
  static {
    __name(this, "GLTFTextureWebPExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.EXT_TEXTURE_WEBP;
    this.isSupported = null;
  }
  loadTexture(textureIndex) {
    const name = this.name;
    const parser = this.parser;
    const json = parser.json;
    const textureDef = json.textures[textureIndex];
    if (!textureDef.extensions || !textureDef.extensions[name]) {
      return null;
    }
    const extension = textureDef.extensions[name];
    const source = json.images[extension.source];
    let loader = parser.textureLoader;
    if (source.uri) {
      const handler = parser.options.manager.getHandler(source.uri);
      if (handler !== null) loader = handler;
    }
    return this.detectSupport().then(function(isSupported) {
      if (isSupported) return parser.loadTextureImage(textureIndex, extension.source, loader);
      if (json.extensionsRequired && json.extensionsRequired.indexOf(name) >= 0) {
        throw new Error("THREE.GLTFLoader: WebP required by asset but unsupported.");
      }
      return parser.loadTexture(textureIndex);
    });
  }
  detectSupport() {
    if (!this.isSupported) {
      this.isSupported = new Promise(function(resolve) {
        const image = new Image();
        image.src = "data:image/webp;base64,UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA";
        image.onload = image.onerror = function() {
          resolve(image.height === 1);
        };
      });
    }
    return this.isSupported;
  }
}
class GLTFTextureAVIFExtension {
  static {
    __name(this, "GLTFTextureAVIFExtension");
  }
  constructor(parser) {
    this.parser = parser;
    this.name = EXTENSIONS.EXT_TEXTURE_AVIF;
    this.isSupported = null;
  }
  loadTexture(textureIndex) {
    const name = this.name;
    const parser = this.parser;
    const json = parser.json;
    const textureDef = json.textures[textureIndex];
    if (!textureDef.extensions || !textureDef.extensions[name]) {
      return null;
    }
    const extension = textureDef.extensions[name];
    const source = json.images[extension.source];
    let loader = parser.textureLoader;
    if (source.uri) {
      const handler = parser.options.manager.getHandler(source.uri);
      if (handler !== null) loader = handler;
    }
    return this.detectSupport().then(function(isSupported) {
      if (isSupported) return parser.loadTextureImage(textureIndex, extension.source, loader);
      if (json.extensionsRequired && json.extensionsRequired.indexOf(name) >= 0) {
        throw new Error("THREE.GLTFLoader: AVIF required by asset but unsupported.");
      }
      return parser.loadTexture(textureIndex);
    });
  }
  detectSupport() {
    if (!this.isSupported) {
      this.isSupported = new Promise(function(resolve) {
        const image = new Image();
        image.src = "data:image/avif;base64,AAAAIGZ0eXBhdmlmAAAAAGF2aWZtaWYxbWlhZk1BMUIAAADybWV0YQAAAAAAAAAoaGRscgAAAAAAAAAAcGljdAAAAAAAAAAAAAAAAGxpYmF2aWYAAAAADnBpdG0AAAAAAAEAAAAeaWxvYwAAAABEAAABAAEAAAABAAABGgAAABcAAAAoaWluZgAAAAAAAQAAABppbmZlAgAAAAABAABhdjAxQ29sb3IAAAAAamlwcnAAAABLaXBjbwAAABRpc3BlAAAAAAAAAAEAAAABAAAAEHBpeGkAAAAAAwgICAAAAAxhdjFDgQAMAAAAABNjb2xybmNseAACAAIABoAAAAAXaXBtYQAAAAAAAAABAAEEAQKDBAAAAB9tZGF0EgAKCBgABogQEDQgMgkQAAAAB8dSLfI=";
        image.onload = image.onerror = function() {
          resolve(image.height === 1);
        };
      });
    }
    return this.isSupported;
  }
}
class GLTFMeshoptCompression {
  static {
    __name(this, "GLTFMeshoptCompression");
  }
  constructor(parser) {
    this.name = EXTENSIONS.EXT_MESHOPT_COMPRESSION;
    this.parser = parser;
  }
  loadBufferView(index) {
    const json = this.parser.json;
    const bufferView = json.bufferViews[index];
    if (bufferView.extensions && bufferView.extensions[this.name]) {
      const extensionDef = bufferView.extensions[this.name];
      const buffer = this.parser.getDependency("buffer", extensionDef.buffer);
      const decoder = this.parser.options.meshoptDecoder;
      if (!decoder || !decoder.supported) {
        if (json.extensionsRequired && json.extensionsRequired.indexOf(this.name) >= 0) {
          throw new Error("THREE.GLTFLoader: setMeshoptDecoder must be called before loading compressed files");
        } else {
          return null;
        }
      }
      return buffer.then(function(res) {
        const byteOffset = extensionDef.byteOffset || 0;
        const byteLength = extensionDef.byteLength || 0;
        const count = extensionDef.count;
        const stride = extensionDef.byteStride;
        const source = new Uint8Array(res, byteOffset, byteLength);
        if (decoder.decodeGltfBufferAsync) {
          return decoder.decodeGltfBufferAsync(count, stride, source, extensionDef.mode, extensionDef.filter).then(function(res2) {
            return res2.buffer;
          });
        } else {
          return decoder.ready.then(function() {
            const result = new ArrayBuffer(count * stride);
            decoder.decodeGltfBuffer(new Uint8Array(result), count, stride, source, extensionDef.mode, extensionDef.filter);
            return result;
          });
        }
      });
    } else {
      return null;
    }
  }
}
let GLTFMeshGpuInstancing$1 = class GLTFMeshGpuInstancing {
  static {
    __name(this, "GLTFMeshGpuInstancing");
  }
  constructor(parser) {
    this.name = EXTENSIONS.EXT_MESH_GPU_INSTANCING;
    this.parser = parser;
  }
  createNodeMesh(nodeIndex) {
    const json = this.parser.json;
    const nodeDef = json.nodes[nodeIndex];
    if (!nodeDef.extensions || !nodeDef.extensions[this.name] || nodeDef.mesh === void 0) {
      return null;
    }
    const meshDef = json.meshes[nodeDef.mesh];
    for (const primitive of meshDef.primitives) {
      if (primitive.mode !== WEBGL_CONSTANTS$1.TRIANGLES && primitive.mode !== WEBGL_CONSTANTS$1.TRIANGLE_STRIP && primitive.mode !== WEBGL_CONSTANTS$1.TRIANGLE_FAN && primitive.mode !== void 0) {
        return null;
      }
    }
    const extensionDef = nodeDef.extensions[this.name];
    const attributesDef = extensionDef.attributes;
    const pending = [];
    const attributes = {};
    for (const key in attributesDef) {
      pending.push(this.parser.getDependency("accessor", attributesDef[key]).then((accessor) => {
        attributes[key] = accessor;
        return attributes[key];
      }));
    }
    if (pending.length < 1) {
      return null;
    }
    pending.push(this.parser.createNodeMesh(nodeIndex));
    return Promise.all(pending).then((results) => {
      const nodeObject = results.pop();
      const meshes = nodeObject.isGroup ? nodeObject.children : [nodeObject];
      const count = results[0].count;
      const instancedMeshes = [];
      for (const mesh of meshes) {
        const m = new Matrix4();
        const p = new Vector3();
        const q = new Quaternion();
        const s = new Vector3(1, 1, 1);
        const instancedMesh = new InstancedMesh(mesh.geometry, mesh.material, count);
        for (let i = 0; i < count; i++) {
          if (attributes.TRANSLATION) {
            p.fromBufferAttribute(attributes.TRANSLATION, i);
          }
          if (attributes.ROTATION) {
            q.fromBufferAttribute(attributes.ROTATION, i);
          }
          if (attributes.SCALE) {
            s.fromBufferAttribute(attributes.SCALE, i);
          }
          instancedMesh.setMatrixAt(i, m.compose(p, q, s));
        }
        for (const attributeName in attributes) {
          if (attributeName === "_COLOR_0") {
            const attr = attributes[attributeName];
            instancedMesh.instanceColor = new InstancedBufferAttribute(attr.array, attr.itemSize, attr.normalized);
          } else if (attributeName !== "TRANSLATION" && attributeName !== "ROTATION" && attributeName !== "SCALE") {
            mesh.geometry.setAttribute(attributeName, attributes[attributeName]);
          }
        }
        Object3D.prototype.copy.call(instancedMesh, mesh);
        this.parser.assignFinalMaterial(instancedMesh);
        instancedMeshes.push(instancedMesh);
      }
      if (nodeObject.isGroup) {
        nodeObject.clear();
        nodeObject.add(...instancedMeshes);
        return nodeObject;
      }
      return instancedMeshes[0];
    });
  }
};
const BINARY_EXTENSION_HEADER_MAGIC = "glTF";
const BINARY_EXTENSION_HEADER_LENGTH = 12;
const BINARY_EXTENSION_CHUNK_TYPES = { JSON: 1313821514, BIN: 5130562 };
class GLTFBinaryExtension {
  static {
    __name(this, "GLTFBinaryExtension");
  }
  constructor(data) {
    this.name = EXTENSIONS.KHR_BINARY_GLTF;
    this.content = null;
    this.body = null;
    const headerView = new DataView(data, 0, BINARY_EXTENSION_HEADER_LENGTH);
    const textDecoder = new TextDecoder();
    this.header = {
      magic: textDecoder.decode(new Uint8Array(data.slice(0, 4))),
      version: headerView.getUint32(4, true),
      length: headerView.getUint32(8, true)
    };
    if (this.header.magic !== BINARY_EXTENSION_HEADER_MAGIC) {
      throw new Error("THREE.GLTFLoader: Unsupported glTF-Binary header.");
    } else if (this.header.version < 2) {
      throw new Error("THREE.GLTFLoader: Legacy binary file detected.");
    }
    const chunkContentsLength = this.header.length - BINARY_EXTENSION_HEADER_LENGTH;
    const chunkView = new DataView(data, BINARY_EXTENSION_HEADER_LENGTH);
    let chunkIndex = 0;
    while (chunkIndex < chunkContentsLength) {
      const chunkLength = chunkView.getUint32(chunkIndex, true);
      chunkIndex += 4;
      const chunkType = chunkView.getUint32(chunkIndex, true);
      chunkIndex += 4;
      if (chunkType === BINARY_EXTENSION_CHUNK_TYPES.JSON) {
        const contentArray = new Uint8Array(data, BINARY_EXTENSION_HEADER_LENGTH + chunkIndex, chunkLength);
        this.content = textDecoder.decode(contentArray);
      } else if (chunkType === BINARY_EXTENSION_CHUNK_TYPES.BIN) {
        const byteOffset = BINARY_EXTENSION_HEADER_LENGTH + chunkIndex;
        this.body = data.slice(byteOffset, byteOffset + chunkLength);
      }
      chunkIndex += chunkLength;
    }
    if (this.content === null) {
      throw new Error("THREE.GLTFLoader: JSON content not found.");
    }
  }
}
class GLTFDracoMeshCompressionExtension {
  static {
    __name(this, "GLTFDracoMeshCompressionExtension");
  }
  constructor(json, dracoLoader) {
    if (!dracoLoader) {
      throw new Error("THREE.GLTFLoader: No DRACOLoader instance provided.");
    }
    this.name = EXTENSIONS.KHR_DRACO_MESH_COMPRESSION;
    this.json = json;
    this.dracoLoader = dracoLoader;
    this.dracoLoader.preload();
  }
  decodePrimitive(primitive, parser) {
    const json = this.json;
    const dracoLoader = this.dracoLoader;
    const bufferViewIndex = primitive.extensions[this.name].bufferView;
    const gltfAttributeMap = primitive.extensions[this.name].attributes;
    const threeAttributeMap = {};
    const attributeNormalizedMap = {};
    const attributeTypeMap = {};
    for (const attributeName in gltfAttributeMap) {
      const threeAttributeName = ATTRIBUTES[attributeName] || attributeName.toLowerCase();
      threeAttributeMap[threeAttributeName] = gltfAttributeMap[attributeName];
    }
    for (const attributeName in primitive.attributes) {
      const threeAttributeName = ATTRIBUTES[attributeName] || attributeName.toLowerCase();
      if (gltfAttributeMap[attributeName] !== void 0) {
        const accessorDef = json.accessors[primitive.attributes[attributeName]];
        const componentType = WEBGL_COMPONENT_TYPES[accessorDef.componentType];
        attributeTypeMap[threeAttributeName] = componentType.name;
        attributeNormalizedMap[threeAttributeName] = accessorDef.normalized === true;
      }
    }
    return parser.getDependency("bufferView", bufferViewIndex).then(function(bufferView) {
      return new Promise(function(resolve, reject) {
        dracoLoader.decodeDracoFile(bufferView, function(geometry) {
          for (const attributeName in geometry.attributes) {
            const attribute = geometry.attributes[attributeName];
            const normalized = attributeNormalizedMap[attributeName];
            if (normalized !== void 0) attribute.normalized = normalized;
          }
          resolve(geometry);
        }, threeAttributeMap, attributeTypeMap, LinearSRGBColorSpace, reject);
      });
    });
  }
}
class GLTFTextureTransformExtension {
  static {
    __name(this, "GLTFTextureTransformExtension");
  }
  constructor() {
    this.name = EXTENSIONS.KHR_TEXTURE_TRANSFORM;
  }
  extendTexture(texture, transform) {
    if ((transform.texCoord === void 0 || transform.texCoord === texture.channel) && transform.offset === void 0 && transform.rotation === void 0 && transform.scale === void 0) {
      return texture;
    }
    texture = texture.clone();
    if (transform.texCoord !== void 0) {
      texture.channel = transform.texCoord;
    }
    if (transform.offset !== void 0) {
      texture.offset.fromArray(transform.offset);
    }
    if (transform.rotation !== void 0) {
      texture.rotation = transform.rotation;
    }
    if (transform.scale !== void 0) {
      texture.repeat.fromArray(transform.scale);
    }
    texture.needsUpdate = true;
    return texture;
  }
}
class GLTFMeshQuantizationExtension {
  static {
    __name(this, "GLTFMeshQuantizationExtension");
  }
  constructor() {
    this.name = EXTENSIONS.KHR_MESH_QUANTIZATION;
  }
}
class GLTFCubicSplineInterpolant extends Interpolant {
  static {
    __name(this, "GLTFCubicSplineInterpolant");
  }
  constructor(parameterPositions, sampleValues, sampleSize, resultBuffer) {
    super(parameterPositions, sampleValues, sampleSize, resultBuffer);
  }
  copySampleValue_(index) {
    const result = this.resultBuffer, values = this.sampleValues, valueSize = this.valueSize, offset = index * valueSize * 3 + valueSize;
    for (let i = 0; i !== valueSize; i++) {
      result[i] = values[offset + i];
    }
    return result;
  }
  interpolate_(i1, t0, t, t1) {
    const result = this.resultBuffer;
    const values = this.sampleValues;
    const stride = this.valueSize;
    const stride2 = stride * 2;
    const stride3 = stride * 3;
    const td2 = t1 - t0;
    const p = (t - t0) / td2;
    const pp = p * p;
    const ppp = pp * p;
    const offset1 = i1 * stride3;
    const offset0 = offset1 - stride3;
    const s2 = -2 * ppp + 3 * pp;
    const s3 = ppp - pp;
    const s0 = 1 - s2;
    const s1 = s3 - pp + p;
    for (let i = 0; i !== stride; i++) {
      const p0 = values[offset0 + i + stride];
      const m0 = values[offset0 + i + stride2] * td2;
      const p1 = values[offset1 + i + stride];
      const m1 = values[offset1 + i] * td2;
      result[i] = s0 * p0 + s1 * m0 + s2 * p1 + s3 * m1;
    }
    return result;
  }
}
const _q = new Quaternion();
class GLTFCubicSplineQuaternionInterpolant extends GLTFCubicSplineInterpolant {
  static {
    __name(this, "GLTFCubicSplineQuaternionInterpolant");
  }
  interpolate_(i1, t0, t, t1) {
    const result = super.interpolate_(i1, t0, t, t1);
    _q.fromArray(result).normalize().toArray(result);
    return result;
  }
}
const WEBGL_CONSTANTS$1 = {
  POINTS: 0,
  LINES: 1,
  LINE_LOOP: 2,
  LINE_STRIP: 3,
  TRIANGLES: 4,
  TRIANGLE_STRIP: 5,
  TRIANGLE_FAN: 6
};
const WEBGL_COMPONENT_TYPES = {
  5120: Int8Array,
  5121: Uint8Array,
  5122: Int16Array,
  5123: Uint16Array,
  5125: Uint32Array,
  5126: Float32Array
};
const WEBGL_FILTERS = {
  9728: NearestFilter,
  9729: LinearFilter,
  9984: NearestMipmapNearestFilter,
  9985: LinearMipmapNearestFilter,
  9986: NearestMipmapLinearFilter,
  9987: LinearMipmapLinearFilter
};
const WEBGL_WRAPPINGS = {
  33071: ClampToEdgeWrapping,
  33648: MirroredRepeatWrapping,
  10497: RepeatWrapping
};
const WEBGL_TYPE_SIZES = {
  "SCALAR": 1,
  "VEC2": 2,
  "VEC3": 3,
  "VEC4": 4,
  "MAT2": 4,
  "MAT3": 9,
  "MAT4": 16
};
const ATTRIBUTES = {
  POSITION: "position",
  NORMAL: "normal",
  TANGENT: "tangent",
  TEXCOORD_0: "uv",
  TEXCOORD_1: "uv1",
  TEXCOORD_2: "uv2",
  TEXCOORD_3: "uv3",
  COLOR_0: "color",
  WEIGHTS_0: "skinWeight",
  JOINTS_0: "skinIndex"
};
const PATH_PROPERTIES$1 = {
  scale: "scale",
  translation: "position",
  rotation: "quaternion",
  weights: "morphTargetInfluences"
};
const INTERPOLATION = {
  CUBICSPLINE: void 0,
  // We use a custom interpolant (GLTFCubicSplineInterpolation) for CUBICSPLINE tracks. Each
  // keyframe track will be initialized with a default interpolation type, then modified.
  LINEAR: InterpolateLinear,
  STEP: InterpolateDiscrete
};
const ALPHA_MODES = {
  OPAQUE: "OPAQUE",
  MASK: "MASK",
  BLEND: "BLEND"
};
function createDefaultMaterial(cache) {
  if (cache["DefaultMaterial"] === void 0) {
    cache["DefaultMaterial"] = new MeshStandardMaterial({
      color: 16777215,
      emissive: 0,
      metalness: 1,
      roughness: 1,
      transparent: false,
      depthTest: true,
      side: FrontSide
    });
  }
  return cache["DefaultMaterial"];
}
__name(createDefaultMaterial, "createDefaultMaterial");
function addUnknownExtensionsToUserData(knownExtensions, object, objectDef) {
  for (const name in objectDef.extensions) {
    if (knownExtensions[name] === void 0) {
      object.userData.gltfExtensions = object.userData.gltfExtensions || {};
      object.userData.gltfExtensions[name] = objectDef.extensions[name];
    }
  }
}
__name(addUnknownExtensionsToUserData, "addUnknownExtensionsToUserData");
function assignExtrasToUserData(object, gltfDef) {
  if (gltfDef.extras !== void 0) {
    if (typeof gltfDef.extras === "object") {
      Object.assign(object.userData, gltfDef.extras);
    } else {
      console.warn("THREE.GLTFLoader: Ignoring primitive type .extras, " + gltfDef.extras);
    }
  }
}
__name(assignExtrasToUserData, "assignExtrasToUserData");
function addMorphTargets(geometry, targets, parser) {
  let hasMorphPosition = false;
  let hasMorphNormal = false;
  let hasMorphColor = false;
  for (let i = 0, il = targets.length; i < il; i++) {
    const target = targets[i];
    if (target.POSITION !== void 0) hasMorphPosition = true;
    if (target.NORMAL !== void 0) hasMorphNormal = true;
    if (target.COLOR_0 !== void 0) hasMorphColor = true;
    if (hasMorphPosition && hasMorphNormal && hasMorphColor) break;
  }
  if (!hasMorphPosition && !hasMorphNormal && !hasMorphColor) return Promise.resolve(geometry);
  const pendingPositionAccessors = [];
  const pendingNormalAccessors = [];
  const pendingColorAccessors = [];
  for (let i = 0, il = targets.length; i < il; i++) {
    const target = targets[i];
    if (hasMorphPosition) {
      const pendingAccessor = target.POSITION !== void 0 ? parser.getDependency("accessor", target.POSITION) : geometry.attributes.position;
      pendingPositionAccessors.push(pendingAccessor);
    }
    if (hasMorphNormal) {
      const pendingAccessor = target.NORMAL !== void 0 ? parser.getDependency("accessor", target.NORMAL) : geometry.attributes.normal;
      pendingNormalAccessors.push(pendingAccessor);
    }
    if (hasMorphColor) {
      const pendingAccessor = target.COLOR_0 !== void 0 ? parser.getDependency("accessor", target.COLOR_0) : geometry.attributes.color;
      pendingColorAccessors.push(pendingAccessor);
    }
  }
  return Promise.all([
    Promise.all(pendingPositionAccessors),
    Promise.all(pendingNormalAccessors),
    Promise.all(pendingColorAccessors)
  ]).then(function(accessors) {
    const morphPositions = accessors[0];
    const morphNormals = accessors[1];
    const morphColors = accessors[2];
    if (hasMorphPosition) geometry.morphAttributes.position = morphPositions;
    if (hasMorphNormal) geometry.morphAttributes.normal = morphNormals;
    if (hasMorphColor) geometry.morphAttributes.color = morphColors;
    geometry.morphTargetsRelative = true;
    return geometry;
  });
}
__name(addMorphTargets, "addMorphTargets");
function updateMorphTargets(mesh, meshDef) {
  mesh.updateMorphTargets();
  if (meshDef.weights !== void 0) {
    for (let i = 0, il = meshDef.weights.length; i < il; i++) {
      mesh.morphTargetInfluences[i] = meshDef.weights[i];
    }
  }
  if (meshDef.extras && Array.isArray(meshDef.extras.targetNames)) {
    const targetNames = meshDef.extras.targetNames;
    if (mesh.morphTargetInfluences.length === targetNames.length) {
      mesh.morphTargetDictionary = {};
      for (let i = 0, il = targetNames.length; i < il; i++) {
        mesh.morphTargetDictionary[targetNames[i]] = i;
      }
    } else {
      console.warn("THREE.GLTFLoader: Invalid extras.targetNames length. Ignoring names.");
    }
  }
}
__name(updateMorphTargets, "updateMorphTargets");
function createPrimitiveKey(primitiveDef) {
  let geometryKey;
  const dracoExtension = primitiveDef.extensions && primitiveDef.extensions[EXTENSIONS.KHR_DRACO_MESH_COMPRESSION];
  if (dracoExtension) {
    geometryKey = "draco:" + dracoExtension.bufferView + ":" + dracoExtension.indices + ":" + createAttributesKey(dracoExtension.attributes);
  } else {
    geometryKey = primitiveDef.indices + ":" + createAttributesKey(primitiveDef.attributes) + ":" + primitiveDef.mode;
  }
  if (primitiveDef.targets !== void 0) {
    for (let i = 0, il = primitiveDef.targets.length; i < il; i++) {
      geometryKey += ":" + createAttributesKey(primitiveDef.targets[i]);
    }
  }
  return geometryKey;
}
__name(createPrimitiveKey, "createPrimitiveKey");
function createAttributesKey(attributes) {
  let attributesKey = "";
  const keys = Object.keys(attributes).sort();
  for (let i = 0, il = keys.length; i < il; i++) {
    attributesKey += keys[i] + ":" + attributes[keys[i]] + ";";
  }
  return attributesKey;
}
__name(createAttributesKey, "createAttributesKey");
function getNormalizedComponentScale(constructor) {
  switch (constructor) {
    case Int8Array:
      return 1 / 127;
    case Uint8Array:
      return 1 / 255;
    case Int16Array:
      return 1 / 32767;
    case Uint16Array:
      return 1 / 65535;
    default:
      throw new Error("THREE.GLTFLoader: Unsupported normalized accessor component type.");
  }
}
__name(getNormalizedComponentScale, "getNormalizedComponentScale");
function getImageURIMimeType(uri) {
  if (uri.search(/\.jpe?g($|\?)/i) > 0 || uri.search(/^data\:image\/jpeg/) === 0) return "image/jpeg";
  if (uri.search(/\.webp($|\?)/i) > 0 || uri.search(/^data\:image\/webp/) === 0) return "image/webp";
  if (uri.search(/\.ktx2($|\?)/i) > 0 || uri.search(/^data\:image\/ktx2/) === 0) return "image/ktx2";
  return "image/png";
}
__name(getImageURIMimeType, "getImageURIMimeType");
const _identityMatrix = new Matrix4();
class GLTFParser {
  static {
    __name(this, "GLTFParser");
  }
  constructor(json = {}, options = {}) {
    this.json = json;
    this.extensions = {};
    this.plugins = {};
    this.options = options;
    this.cache = new GLTFRegistry();
    this.associations = /* @__PURE__ */ new Map();
    this.primitiveCache = {};
    this.nodeCache = {};
    this.meshCache = { refs: {}, uses: {} };
    this.cameraCache = { refs: {}, uses: {} };
    this.lightCache = { refs: {}, uses: {} };
    this.sourceCache = {};
    this.textureCache = {};
    this.nodeNamesUsed = {};
    let isSafari = false;
    let safariVersion = -1;
    let isFirefox = false;
    let firefoxVersion = -1;
    if (typeof navigator !== "undefined") {
      const userAgent = navigator.userAgent;
      isSafari = /^((?!chrome|android).)*safari/i.test(userAgent) === true;
      const safariMatch = userAgent.match(/Version\/(\d+)/);
      safariVersion = isSafari && safariMatch ? parseInt(safariMatch[1], 10) : -1;
      isFirefox = userAgent.indexOf("Firefox") > -1;
      firefoxVersion = isFirefox ? userAgent.match(/Firefox\/([0-9]+)\./)[1] : -1;
    }
    if (typeof createImageBitmap === "undefined" || isSafari && safariVersion < 17 || isFirefox && firefoxVersion < 98) {
      this.textureLoader = new TextureLoader(this.options.manager);
    } else {
      this.textureLoader = new ImageBitmapLoader(this.options.manager);
    }
    this.textureLoader.setCrossOrigin(this.options.crossOrigin);
    this.textureLoader.setRequestHeader(this.options.requestHeader);
    this.fileLoader = new FileLoader(this.options.manager);
    this.fileLoader.setResponseType("arraybuffer");
    if (this.options.crossOrigin === "use-credentials") {
      this.fileLoader.setWithCredentials(true);
    }
  }
  setExtensions(extensions) {
    this.extensions = extensions;
  }
  setPlugins(plugins) {
    this.plugins = plugins;
  }
  parse(onLoad, onError) {
    const parser = this;
    const json = this.json;
    const extensions = this.extensions;
    this.cache.removeAll();
    this.nodeCache = {};
    this._invokeAll(function(ext) {
      return ext._markDefs && ext._markDefs();
    });
    Promise.all(this._invokeAll(function(ext) {
      return ext.beforeRoot && ext.beforeRoot();
    })).then(function() {
      return Promise.all([
        parser.getDependencies("scene"),
        parser.getDependencies("animation"),
        parser.getDependencies("camera")
      ]);
    }).then(function(dependencies) {
      const result = {
        scene: dependencies[0][json.scene || 0],
        scenes: dependencies[0],
        animations: dependencies[1],
        cameras: dependencies[2],
        asset: json.asset,
        parser,
        userData: {}
      };
      addUnknownExtensionsToUserData(extensions, result, json);
      assignExtrasToUserData(result, json);
      return Promise.all(parser._invokeAll(function(ext) {
        return ext.afterRoot && ext.afterRoot(result);
      })).then(function() {
        for (const scene of result.scenes) {
          scene.updateMatrixWorld();
        }
        onLoad(result);
      });
    }).catch(onError);
  }
  /**
   * Marks the special nodes/meshes in json for efficient parse.
   */
  _markDefs() {
    const nodeDefs = this.json.nodes || [];
    const skinDefs = this.json.skins || [];
    const meshDefs = this.json.meshes || [];
    for (let skinIndex = 0, skinLength = skinDefs.length; skinIndex < skinLength; skinIndex++) {
      const joints = skinDefs[skinIndex].joints;
      for (let i = 0, il = joints.length; i < il; i++) {
        nodeDefs[joints[i]].isBone = true;
      }
    }
    for (let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex++) {
      const nodeDef = nodeDefs[nodeIndex];
      if (nodeDef.mesh !== void 0) {
        this._addNodeRef(this.meshCache, nodeDef.mesh);
        if (nodeDef.skin !== void 0) {
          meshDefs[nodeDef.mesh].isSkinnedMesh = true;
        }
      }
      if (nodeDef.camera !== void 0) {
        this._addNodeRef(this.cameraCache, nodeDef.camera);
      }
    }
  }
  /**
   * Counts references to shared node / Object3D resources. These resources
   * can be reused, or "instantiated", at multiple nodes in the scene
   * hierarchy. Mesh, Camera, and Light instances are instantiated and must
   * be marked. Non-scenegraph resources (like Materials, Geometries, and
   * Textures) can be reused directly and are not marked here.
   *
   * Example: CesiumMilkTruck sample model reuses "Wheel" meshes.
   */
  _addNodeRef(cache, index) {
    if (index === void 0) return;
    if (cache.refs[index] === void 0) {
      cache.refs[index] = cache.uses[index] = 0;
    }
    cache.refs[index]++;
  }
  /** Returns a reference to a shared resource, cloning it if necessary. */
  _getNodeRef(cache, index, object) {
    if (cache.refs[index] <= 1) return object;
    const ref = object.clone();
    const updateMappings = /* @__PURE__ */ __name((original, clone) => {
      const mappings = this.associations.get(original);
      if (mappings != null) {
        this.associations.set(clone, mappings);
      }
      for (const [i, child] of original.children.entries()) {
        updateMappings(child, clone.children[i]);
      }
    }, "updateMappings");
    updateMappings(object, ref);
    ref.name += "_instance_" + cache.uses[index]++;
    return ref;
  }
  _invokeOne(func) {
    const extensions = Object.values(this.plugins);
    extensions.push(this);
    for (let i = 0; i < extensions.length; i++) {
      const result = func(extensions[i]);
      if (result) return result;
    }
    return null;
  }
  _invokeAll(func) {
    const extensions = Object.values(this.plugins);
    extensions.unshift(this);
    const pending = [];
    for (let i = 0; i < extensions.length; i++) {
      const result = func(extensions[i]);
      if (result) pending.push(result);
    }
    return pending;
  }
  /**
   * Requests the specified dependency asynchronously, with caching.
   * @param {string} type
   * @param {number} index
   * @return {Promise<Object3D|Material|THREE.Texture|AnimationClip|ArrayBuffer|Object>}
   */
  getDependency(type, index) {
    const cacheKey = type + ":" + index;
    let dependency = this.cache.get(cacheKey);
    if (!dependency) {
      switch (type) {
        case "scene":
          dependency = this.loadScene(index);
          break;
        case "node":
          dependency = this._invokeOne(function(ext) {
            return ext.loadNode && ext.loadNode(index);
          });
          break;
        case "mesh":
          dependency = this._invokeOne(function(ext) {
            return ext.loadMesh && ext.loadMesh(index);
          });
          break;
        case "accessor":
          dependency = this.loadAccessor(index);
          break;
        case "bufferView":
          dependency = this._invokeOne(function(ext) {
            return ext.loadBufferView && ext.loadBufferView(index);
          });
          break;
        case "buffer":
          dependency = this.loadBuffer(index);
          break;
        case "material":
          dependency = this._invokeOne(function(ext) {
            return ext.loadMaterial && ext.loadMaterial(index);
          });
          break;
        case "texture":
          dependency = this._invokeOne(function(ext) {
            return ext.loadTexture && ext.loadTexture(index);
          });
          break;
        case "skin":
          dependency = this.loadSkin(index);
          break;
        case "animation":
          dependency = this._invokeOne(function(ext) {
            return ext.loadAnimation && ext.loadAnimation(index);
          });
          break;
        case "camera":
          dependency = this.loadCamera(index);
          break;
        default:
          dependency = this._invokeOne(function(ext) {
            return ext != this && ext.getDependency && ext.getDependency(type, index);
          });
          if (!dependency) {
            throw new Error("Unknown type: " + type);
          }
          break;
      }
      this.cache.add(cacheKey, dependency);
    }
    return dependency;
  }
  /**
   * Requests all dependencies of the specified type asynchronously, with caching.
   * @param {string} type
   * @return {Promise<Array<Object>>}
   */
  getDependencies(type) {
    let dependencies = this.cache.get(type);
    if (!dependencies) {
      const parser = this;
      const defs = this.json[type + (type === "mesh" ? "es" : "s")] || [];
      dependencies = Promise.all(defs.map(function(def, index) {
        return parser.getDependency(type, index);
      }));
      this.cache.add(type, dependencies);
    }
    return dependencies;
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views
   * @param {number} bufferIndex
   * @return {Promise<ArrayBuffer>}
   */
  loadBuffer(bufferIndex) {
    const bufferDef = this.json.buffers[bufferIndex];
    const loader = this.fileLoader;
    if (bufferDef.type && bufferDef.type !== "arraybuffer") {
      throw new Error("THREE.GLTFLoader: " + bufferDef.type + " buffer type is not supported.");
    }
    if (bufferDef.uri === void 0 && bufferIndex === 0) {
      return Promise.resolve(this.extensions[EXTENSIONS.KHR_BINARY_GLTF].body);
    }
    const options = this.options;
    return new Promise(function(resolve, reject) {
      loader.load(LoaderUtils.resolveURL(bufferDef.uri, options.path), resolve, void 0, function() {
        reject(new Error('THREE.GLTFLoader: Failed to load buffer "' + bufferDef.uri + '".'));
      });
    });
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views
   * @param {number} bufferViewIndex
   * @return {Promise<ArrayBuffer>}
   */
  loadBufferView(bufferViewIndex) {
    const bufferViewDef = this.json.bufferViews[bufferViewIndex];
    return this.getDependency("buffer", bufferViewDef.buffer).then(function(buffer) {
      const byteLength = bufferViewDef.byteLength || 0;
      const byteOffset = bufferViewDef.byteOffset || 0;
      return buffer.slice(byteOffset, byteOffset + byteLength);
    });
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#accessors
   * @param {number} accessorIndex
   * @return {Promise<BufferAttribute|InterleavedBufferAttribute>}
   */
  loadAccessor(accessorIndex) {
    const parser = this;
    const json = this.json;
    const accessorDef = this.json.accessors[accessorIndex];
    if (accessorDef.bufferView === void 0 && accessorDef.sparse === void 0) {
      const itemSize = WEBGL_TYPE_SIZES[accessorDef.type];
      const TypedArray = WEBGL_COMPONENT_TYPES[accessorDef.componentType];
      const normalized = accessorDef.normalized === true;
      const array = new TypedArray(accessorDef.count * itemSize);
      return Promise.resolve(new BufferAttribute(array, itemSize, normalized));
    }
    const pendingBufferViews = [];
    if (accessorDef.bufferView !== void 0) {
      pendingBufferViews.push(this.getDependency("bufferView", accessorDef.bufferView));
    } else {
      pendingBufferViews.push(null);
    }
    if (accessorDef.sparse !== void 0) {
      pendingBufferViews.push(this.getDependency("bufferView", accessorDef.sparse.indices.bufferView));
      pendingBufferViews.push(this.getDependency("bufferView", accessorDef.sparse.values.bufferView));
    }
    return Promise.all(pendingBufferViews).then(function(bufferViews) {
      const bufferView = bufferViews[0];
      const itemSize = WEBGL_TYPE_SIZES[accessorDef.type];
      const TypedArray = WEBGL_COMPONENT_TYPES[accessorDef.componentType];
      const elementBytes = TypedArray.BYTES_PER_ELEMENT;
      const itemBytes = elementBytes * itemSize;
      const byteOffset = accessorDef.byteOffset || 0;
      const byteStride = accessorDef.bufferView !== void 0 ? json.bufferViews[accessorDef.bufferView].byteStride : void 0;
      const normalized = accessorDef.normalized === true;
      let array, bufferAttribute;
      if (byteStride && byteStride !== itemBytes) {
        const ibSlice = Math.floor(byteOffset / byteStride);
        const ibCacheKey = "InterleavedBuffer:" + accessorDef.bufferView + ":" + accessorDef.componentType + ":" + ibSlice + ":" + accessorDef.count;
        let ib = parser.cache.get(ibCacheKey);
        if (!ib) {
          array = new TypedArray(bufferView, ibSlice * byteStride, accessorDef.count * byteStride / elementBytes);
          ib = new InterleavedBuffer(array, byteStride / elementBytes);
          parser.cache.add(ibCacheKey, ib);
        }
        bufferAttribute = new InterleavedBufferAttribute(ib, itemSize, byteOffset % byteStride / elementBytes, normalized);
      } else {
        if (bufferView === null) {
          array = new TypedArray(accessorDef.count * itemSize);
        } else {
          array = new TypedArray(bufferView, byteOffset, accessorDef.count * itemSize);
        }
        bufferAttribute = new BufferAttribute(array, itemSize, normalized);
      }
      if (accessorDef.sparse !== void 0) {
        const itemSizeIndices = WEBGL_TYPE_SIZES.SCALAR;
        const TypedArrayIndices = WEBGL_COMPONENT_TYPES[accessorDef.sparse.indices.componentType];
        const byteOffsetIndices = accessorDef.sparse.indices.byteOffset || 0;
        const byteOffsetValues = accessorDef.sparse.values.byteOffset || 0;
        const sparseIndices = new TypedArrayIndices(bufferViews[1], byteOffsetIndices, accessorDef.sparse.count * itemSizeIndices);
        const sparseValues = new TypedArray(bufferViews[2], byteOffsetValues, accessorDef.sparse.count * itemSize);
        if (bufferView !== null) {
          bufferAttribute = new BufferAttribute(bufferAttribute.array.slice(), bufferAttribute.itemSize, bufferAttribute.normalized);
        }
        bufferAttribute.normalized = false;
        for (let i = 0, il = sparseIndices.length; i < il; i++) {
          const index = sparseIndices[i];
          bufferAttribute.setX(index, sparseValues[i * itemSize]);
          if (itemSize >= 2) bufferAttribute.setY(index, sparseValues[i * itemSize + 1]);
          if (itemSize >= 3) bufferAttribute.setZ(index, sparseValues[i * itemSize + 2]);
          if (itemSize >= 4) bufferAttribute.setW(index, sparseValues[i * itemSize + 3]);
          if (itemSize >= 5) throw new Error("THREE.GLTFLoader: Unsupported itemSize in sparse BufferAttribute.");
        }
        bufferAttribute.normalized = normalized;
      }
      return bufferAttribute;
    });
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#textures
   * @param {number} textureIndex
   * @return {Promise<THREE.Texture|null>}
   */
  loadTexture(textureIndex) {
    const json = this.json;
    const options = this.options;
    const textureDef = json.textures[textureIndex];
    const sourceIndex = textureDef.source;
    const sourceDef = json.images[sourceIndex];
    let loader = this.textureLoader;
    if (sourceDef.uri) {
      const handler = options.manager.getHandler(sourceDef.uri);
      if (handler !== null) loader = handler;
    }
    return this.loadTextureImage(textureIndex, sourceIndex, loader);
  }
  loadTextureImage(textureIndex, sourceIndex, loader) {
    const parser = this;
    const json = this.json;
    const textureDef = json.textures[textureIndex];
    const sourceDef = json.images[sourceIndex];
    const cacheKey = (sourceDef.uri || sourceDef.bufferView) + ":" + textureDef.sampler;
    if (this.textureCache[cacheKey]) {
      return this.textureCache[cacheKey];
    }
    const promise = this.loadImageSource(sourceIndex, loader).then(function(texture) {
      texture.flipY = false;
      texture.name = textureDef.name || sourceDef.name || "";
      if (texture.name === "" && typeof sourceDef.uri === "string" && sourceDef.uri.startsWith("data:image/") === false) {
        texture.name = sourceDef.uri;
      }
      const samplers = json.samplers || {};
      const sampler = samplers[textureDef.sampler] || {};
      texture.magFilter = WEBGL_FILTERS[sampler.magFilter] || LinearFilter;
      texture.minFilter = WEBGL_FILTERS[sampler.minFilter] || LinearMipmapLinearFilter;
      texture.wrapS = WEBGL_WRAPPINGS[sampler.wrapS] || RepeatWrapping;
      texture.wrapT = WEBGL_WRAPPINGS[sampler.wrapT] || RepeatWrapping;
      texture.generateMipmaps = !texture.isCompressedTexture && texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter;
      parser.associations.set(texture, { textures: textureIndex });
      return texture;
    }).catch(function() {
      return null;
    });
    this.textureCache[cacheKey] = promise;
    return promise;
  }
  loadImageSource(sourceIndex, loader) {
    const parser = this;
    const json = this.json;
    const options = this.options;
    if (this.sourceCache[sourceIndex] !== void 0) {
      return this.sourceCache[sourceIndex].then((texture) => texture.clone());
    }
    const sourceDef = json.images[sourceIndex];
    const URL2 = self.URL || self.webkitURL;
    let sourceURI = sourceDef.uri || "";
    let isObjectURL = false;
    if (sourceDef.bufferView !== void 0) {
      sourceURI = parser.getDependency("bufferView", sourceDef.bufferView).then(function(bufferView) {
        isObjectURL = true;
        const blob2 = new Blob([bufferView], { type: sourceDef.mimeType });
        sourceURI = URL2.createObjectURL(blob2);
        return sourceURI;
      });
    } else if (sourceDef.uri === void 0) {
      throw new Error("THREE.GLTFLoader: Image " + sourceIndex + " is missing URI and bufferView");
    }
    const promise = Promise.resolve(sourceURI).then(function(sourceURI2) {
      return new Promise(function(resolve, reject) {
        let onLoad = resolve;
        if (loader.isImageBitmapLoader === true) {
          onLoad = /* @__PURE__ */ __name(function(imageBitmap) {
            const texture = new Texture(imageBitmap);
            texture.needsUpdate = true;
            resolve(texture);
          }, "onLoad");
        }
        loader.load(LoaderUtils.resolveURL(sourceURI2, options.path), onLoad, void 0, reject);
      });
    }).then(function(texture) {
      if (isObjectURL === true) {
        URL2.revokeObjectURL(sourceURI);
      }
      assignExtrasToUserData(texture, sourceDef);
      texture.userData.mimeType = sourceDef.mimeType || getImageURIMimeType(sourceDef.uri);
      return texture;
    }).catch(function(error) {
      console.error("THREE.GLTFLoader: Couldn't load texture", sourceURI);
      throw error;
    });
    this.sourceCache[sourceIndex] = promise;
    return promise;
  }
  /**
   * Asynchronously assigns a texture to the given material parameters.
   * @param {Object} materialParams
   * @param {string} mapName
   * @param {Object} mapDef
   * @return {Promise<Texture>}
   */
  assignTexture(materialParams, mapName, mapDef, colorSpace) {
    const parser = this;
    return this.getDependency("texture", mapDef.index).then(function(texture) {
      if (!texture) return null;
      if (mapDef.texCoord !== void 0 && mapDef.texCoord > 0) {
        texture = texture.clone();
        texture.channel = mapDef.texCoord;
      }
      if (parser.extensions[EXTENSIONS.KHR_TEXTURE_TRANSFORM]) {
        const transform = mapDef.extensions !== void 0 ? mapDef.extensions[EXTENSIONS.KHR_TEXTURE_TRANSFORM] : void 0;
        if (transform) {
          const gltfReference = parser.associations.get(texture);
          texture = parser.extensions[EXTENSIONS.KHR_TEXTURE_TRANSFORM].extendTexture(texture, transform);
          parser.associations.set(texture, gltfReference);
        }
      }
      if (colorSpace !== void 0) {
        texture.colorSpace = colorSpace;
      }
      materialParams[mapName] = texture;
      return texture;
    });
  }
  /**
   * Assigns final material to a Mesh, Line, or Points instance. The instance
   * already has a material (generated from the glTF material options alone)
   * but reuse of the same glTF material may require multiple threejs materials
   * to accommodate different primitive types, defines, etc. New materials will
   * be created if necessary, and reused from a cache.
   * @param  {Object3D} mesh Mesh, Line, or Points instance.
   */
  assignFinalMaterial(mesh) {
    const geometry = mesh.geometry;
    let material = mesh.material;
    const useDerivativeTangents = geometry.attributes.tangent === void 0;
    const useVertexColors = geometry.attributes.color !== void 0;
    const useFlatShading = geometry.attributes.normal === void 0;
    if (mesh.isPoints) {
      const cacheKey = "PointsMaterial:" + material.uuid;
      let pointsMaterial = this.cache.get(cacheKey);
      if (!pointsMaterial) {
        pointsMaterial = new PointsMaterial();
        Material.prototype.copy.call(pointsMaterial, material);
        pointsMaterial.color.copy(material.color);
        pointsMaterial.map = material.map;
        pointsMaterial.sizeAttenuation = false;
        this.cache.add(cacheKey, pointsMaterial);
      }
      material = pointsMaterial;
    } else if (mesh.isLine) {
      const cacheKey = "LineBasicMaterial:" + material.uuid;
      let lineMaterial = this.cache.get(cacheKey);
      if (!lineMaterial) {
        lineMaterial = new LineBasicMaterial();
        Material.prototype.copy.call(lineMaterial, material);
        lineMaterial.color.copy(material.color);
        lineMaterial.map = material.map;
        this.cache.add(cacheKey, lineMaterial);
      }
      material = lineMaterial;
    }
    if (useDerivativeTangents || useVertexColors || useFlatShading) {
      let cacheKey = "ClonedMaterial:" + material.uuid + ":";
      if (useDerivativeTangents) cacheKey += "derivative-tangents:";
      if (useVertexColors) cacheKey += "vertex-colors:";
      if (useFlatShading) cacheKey += "flat-shading:";
      let cachedMaterial = this.cache.get(cacheKey);
      if (!cachedMaterial) {
        cachedMaterial = material.clone();
        if (useVertexColors) cachedMaterial.vertexColors = true;
        if (useFlatShading) cachedMaterial.flatShading = true;
        if (useDerivativeTangents) {
          if (cachedMaterial.normalScale) cachedMaterial.normalScale.y *= -1;
          if (cachedMaterial.clearcoatNormalScale) cachedMaterial.clearcoatNormalScale.y *= -1;
        }
        this.cache.add(cacheKey, cachedMaterial);
        this.associations.set(cachedMaterial, this.associations.get(material));
      }
      material = cachedMaterial;
    }
    mesh.material = material;
  }
  getMaterialType() {
    return MeshStandardMaterial;
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#materials
   * @param {number} materialIndex
   * @return {Promise<Material>}
   */
  loadMaterial(materialIndex) {
    const parser = this;
    const json = this.json;
    const extensions = this.extensions;
    const materialDef = json.materials[materialIndex];
    let materialType;
    const materialParams = {};
    const materialExtensions = materialDef.extensions || {};
    const pending = [];
    if (materialExtensions[EXTENSIONS.KHR_MATERIALS_UNLIT]) {
      const kmuExtension = extensions[EXTENSIONS.KHR_MATERIALS_UNLIT];
      materialType = kmuExtension.getMaterialType();
      pending.push(kmuExtension.extendParams(materialParams, materialDef, parser));
    } else {
      const metallicRoughness = materialDef.pbrMetallicRoughness || {};
      materialParams.color = new Color(1, 1, 1);
      materialParams.opacity = 1;
      if (Array.isArray(metallicRoughness.baseColorFactor)) {
        const array = metallicRoughness.baseColorFactor;
        materialParams.color.setRGB(array[0], array[1], array[2], LinearSRGBColorSpace);
        materialParams.opacity = array[3];
      }
      if (metallicRoughness.baseColorTexture !== void 0) {
        pending.push(parser.assignTexture(materialParams, "map", metallicRoughness.baseColorTexture, SRGBColorSpace));
      }
      materialParams.metalness = metallicRoughness.metallicFactor !== void 0 ? metallicRoughness.metallicFactor : 1;
      materialParams.roughness = metallicRoughness.roughnessFactor !== void 0 ? metallicRoughness.roughnessFactor : 1;
      if (metallicRoughness.metallicRoughnessTexture !== void 0) {
        pending.push(parser.assignTexture(materialParams, "metalnessMap", metallicRoughness.metallicRoughnessTexture));
        pending.push(parser.assignTexture(materialParams, "roughnessMap", metallicRoughness.metallicRoughnessTexture));
      }
      materialType = this._invokeOne(function(ext) {
        return ext.getMaterialType && ext.getMaterialType(materialIndex);
      });
      pending.push(Promise.all(this._invokeAll(function(ext) {
        return ext.extendMaterialParams && ext.extendMaterialParams(materialIndex, materialParams);
      })));
    }
    if (materialDef.doubleSided === true) {
      materialParams.side = DoubleSide;
    }
    const alphaMode = materialDef.alphaMode || ALPHA_MODES.OPAQUE;
    if (alphaMode === ALPHA_MODES.BLEND) {
      materialParams.transparent = true;
      materialParams.depthWrite = false;
    } else {
      materialParams.transparent = false;
      if (alphaMode === ALPHA_MODES.MASK) {
        materialParams.alphaTest = materialDef.alphaCutoff !== void 0 ? materialDef.alphaCutoff : 0.5;
      }
    }
    if (materialDef.normalTexture !== void 0 && materialType !== MeshBasicMaterial) {
      pending.push(parser.assignTexture(materialParams, "normalMap", materialDef.normalTexture));
      materialParams.normalScale = new Vector2(1, 1);
      if (materialDef.normalTexture.scale !== void 0) {
        const scale = materialDef.normalTexture.scale;
        materialParams.normalScale.set(scale, scale);
      }
    }
    if (materialDef.occlusionTexture !== void 0 && materialType !== MeshBasicMaterial) {
      pending.push(parser.assignTexture(materialParams, "aoMap", materialDef.occlusionTexture));
      if (materialDef.occlusionTexture.strength !== void 0) {
        materialParams.aoMapIntensity = materialDef.occlusionTexture.strength;
      }
    }
    if (materialDef.emissiveFactor !== void 0 && materialType !== MeshBasicMaterial) {
      const emissiveFactor = materialDef.emissiveFactor;
      materialParams.emissive = new Color().setRGB(emissiveFactor[0], emissiveFactor[1], emissiveFactor[2], LinearSRGBColorSpace);
    }
    if (materialDef.emissiveTexture !== void 0 && materialType !== MeshBasicMaterial) {
      pending.push(parser.assignTexture(materialParams, "emissiveMap", materialDef.emissiveTexture, SRGBColorSpace));
    }
    return Promise.all(pending).then(function() {
      const material = new materialType(materialParams);
      if (materialDef.name) material.name = materialDef.name;
      assignExtrasToUserData(material, materialDef);
      parser.associations.set(material, { materials: materialIndex });
      if (materialDef.extensions) addUnknownExtensionsToUserData(extensions, material, materialDef);
      return material;
    });
  }
  /** When Object3D instances are targeted by animation, they need unique names. */
  createUniqueName(originalName) {
    const sanitizedName = PropertyBinding.sanitizeNodeName(originalName || "");
    if (sanitizedName in this.nodeNamesUsed) {
      return sanitizedName + "_" + ++this.nodeNamesUsed[sanitizedName];
    } else {
      this.nodeNamesUsed[sanitizedName] = 0;
      return sanitizedName;
    }
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#geometry
   *
   * Creates BufferGeometries from primitives.
   *
   * @param {Array<GLTF.Primitive>} primitives
   * @return {Promise<Array<BufferGeometry>>}
   */
  loadGeometries(primitives) {
    const parser = this;
    const extensions = this.extensions;
    const cache = this.primitiveCache;
    function createDracoPrimitive(primitive) {
      return extensions[EXTENSIONS.KHR_DRACO_MESH_COMPRESSION].decodePrimitive(primitive, parser).then(function(geometry) {
        return addPrimitiveAttributes(geometry, primitive, parser);
      });
    }
    __name(createDracoPrimitive, "createDracoPrimitive");
    const pending = [];
    for (let i = 0, il = primitives.length; i < il; i++) {
      const primitive = primitives[i];
      const cacheKey = createPrimitiveKey(primitive);
      const cached = cache[cacheKey];
      if (cached) {
        pending.push(cached.promise);
      } else {
        let geometryPromise;
        if (primitive.extensions && primitive.extensions[EXTENSIONS.KHR_DRACO_MESH_COMPRESSION]) {
          geometryPromise = createDracoPrimitive(primitive);
        } else {
          geometryPromise = addPrimitiveAttributes(new BufferGeometry(), primitive, parser);
        }
        cache[cacheKey] = { primitive, promise: geometryPromise };
        pending.push(geometryPromise);
      }
    }
    return Promise.all(pending);
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#meshes
   * @param {number} meshIndex
   * @return {Promise<Group|Mesh|SkinnedMesh>}
   */
  loadMesh(meshIndex) {
    const parser = this;
    const json = this.json;
    const extensions = this.extensions;
    const meshDef = json.meshes[meshIndex];
    const primitives = meshDef.primitives;
    const pending = [];
    for (let i = 0, il = primitives.length; i < il; i++) {
      const material = primitives[i].material === void 0 ? createDefaultMaterial(this.cache) : this.getDependency("material", primitives[i].material);
      pending.push(material);
    }
    pending.push(parser.loadGeometries(primitives));
    return Promise.all(pending).then(function(results) {
      const materials = results.slice(0, results.length - 1);
      const geometries = results[results.length - 1];
      const meshes = [];
      for (let i = 0, il = geometries.length; i < il; i++) {
        const geometry = geometries[i];
        const primitive = primitives[i];
        let mesh;
        const material = materials[i];
        if (primitive.mode === WEBGL_CONSTANTS$1.TRIANGLES || primitive.mode === WEBGL_CONSTANTS$1.TRIANGLE_STRIP || primitive.mode === WEBGL_CONSTANTS$1.TRIANGLE_FAN || primitive.mode === void 0) {
          mesh = meshDef.isSkinnedMesh === true ? new SkinnedMesh(geometry, material) : new Mesh(geometry, material);
          if (mesh.isSkinnedMesh === true) {
            mesh.normalizeSkinWeights();
          }
          if (primitive.mode === WEBGL_CONSTANTS$1.TRIANGLE_STRIP) {
            mesh.geometry = toTrianglesDrawMode(mesh.geometry, TriangleStripDrawMode);
          } else if (primitive.mode === WEBGL_CONSTANTS$1.TRIANGLE_FAN) {
            mesh.geometry = toTrianglesDrawMode(mesh.geometry, TriangleFanDrawMode);
          }
        } else if (primitive.mode === WEBGL_CONSTANTS$1.LINES) {
          mesh = new LineSegments(geometry, material);
        } else if (primitive.mode === WEBGL_CONSTANTS$1.LINE_STRIP) {
          mesh = new Line(geometry, material);
        } else if (primitive.mode === WEBGL_CONSTANTS$1.LINE_LOOP) {
          mesh = new LineLoop(geometry, material);
        } else if (primitive.mode === WEBGL_CONSTANTS$1.POINTS) {
          mesh = new Points(geometry, material);
        } else {
          throw new Error("THREE.GLTFLoader: Primitive mode unsupported: " + primitive.mode);
        }
        if (Object.keys(mesh.geometry.morphAttributes).length > 0) {
          updateMorphTargets(mesh, meshDef);
        }
        mesh.name = parser.createUniqueName(meshDef.name || "mesh_" + meshIndex);
        assignExtrasToUserData(mesh, meshDef);
        if (primitive.extensions) addUnknownExtensionsToUserData(extensions, mesh, primitive);
        parser.assignFinalMaterial(mesh);
        meshes.push(mesh);
      }
      for (let i = 0, il = meshes.length; i < il; i++) {
        parser.associations.set(meshes[i], {
          meshes: meshIndex,
          primitives: i
        });
      }
      if (meshes.length === 1) {
        if (meshDef.extensions) addUnknownExtensionsToUserData(extensions, meshes[0], meshDef);
        return meshes[0];
      }
      const group = new Group();
      if (meshDef.extensions) addUnknownExtensionsToUserData(extensions, group, meshDef);
      parser.associations.set(group, { meshes: meshIndex });
      for (let i = 0, il = meshes.length; i < il; i++) {
        group.add(meshes[i]);
      }
      return group;
    });
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#cameras
   * @param {number} cameraIndex
   * @return {Promise<THREE.Camera>}
   */
  loadCamera(cameraIndex) {
    let camera;
    const cameraDef = this.json.cameras[cameraIndex];
    const params = cameraDef[cameraDef.type];
    if (!params) {
      console.warn("THREE.GLTFLoader: Missing camera parameters.");
      return;
    }
    if (cameraDef.type === "perspective") {
      camera = new PerspectiveCamera(MathUtils.radToDeg(params.yfov), params.aspectRatio || 1, params.znear || 1, params.zfar || 2e6);
    } else if (cameraDef.type === "orthographic") {
      camera = new OrthographicCamera(-params.xmag, params.xmag, params.ymag, -params.ymag, params.znear, params.zfar);
    }
    if (cameraDef.name) camera.name = this.createUniqueName(cameraDef.name);
    assignExtrasToUserData(camera, cameraDef);
    return Promise.resolve(camera);
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#skins
   * @param {number} skinIndex
   * @return {Promise<Skeleton>}
   */
  loadSkin(skinIndex) {
    const skinDef = this.json.skins[skinIndex];
    const pending = [];
    for (let i = 0, il = skinDef.joints.length; i < il; i++) {
      pending.push(this._loadNodeShallow(skinDef.joints[i]));
    }
    if (skinDef.inverseBindMatrices !== void 0) {
      pending.push(this.getDependency("accessor", skinDef.inverseBindMatrices));
    } else {
      pending.push(null);
    }
    return Promise.all(pending).then(function(results) {
      const inverseBindMatrices = results.pop();
      const jointNodes = results;
      const bones = [];
      const boneInverses = [];
      for (let i = 0, il = jointNodes.length; i < il; i++) {
        const jointNode = jointNodes[i];
        if (jointNode) {
          bones.push(jointNode);
          const mat = new Matrix4();
          if (inverseBindMatrices !== null) {
            mat.fromArray(inverseBindMatrices.array, i * 16);
          }
          boneInverses.push(mat);
        } else {
          console.warn('THREE.GLTFLoader: Joint "%s" could not be found.', skinDef.joints[i]);
        }
      }
      return new Skeleton(bones, boneInverses);
    });
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#animations
   * @param {number} animationIndex
   * @return {Promise<AnimationClip>}
   */
  loadAnimation(animationIndex) {
    const json = this.json;
    const parser = this;
    const animationDef = json.animations[animationIndex];
    const animationName = animationDef.name ? animationDef.name : "animation_" + animationIndex;
    const pendingNodes = [];
    const pendingInputAccessors = [];
    const pendingOutputAccessors = [];
    const pendingSamplers = [];
    const pendingTargets = [];
    for (let i = 0, il = animationDef.channels.length; i < il; i++) {
      const channel = animationDef.channels[i];
      const sampler = animationDef.samplers[channel.sampler];
      const target = channel.target;
      const name = target.node;
      const input = animationDef.parameters !== void 0 ? animationDef.parameters[sampler.input] : sampler.input;
      const output = animationDef.parameters !== void 0 ? animationDef.parameters[sampler.output] : sampler.output;
      if (target.node === void 0) continue;
      pendingNodes.push(this.getDependency("node", name));
      pendingInputAccessors.push(this.getDependency("accessor", input));
      pendingOutputAccessors.push(this.getDependency("accessor", output));
      pendingSamplers.push(sampler);
      pendingTargets.push(target);
    }
    return Promise.all([
      Promise.all(pendingNodes),
      Promise.all(pendingInputAccessors),
      Promise.all(pendingOutputAccessors),
      Promise.all(pendingSamplers),
      Promise.all(pendingTargets)
    ]).then(function(dependencies) {
      const nodes = dependencies[0];
      const inputAccessors = dependencies[1];
      const outputAccessors = dependencies[2];
      const samplers = dependencies[3];
      const targets = dependencies[4];
      const tracks = [];
      for (let i = 0, il = nodes.length; i < il; i++) {
        const node = nodes[i];
        const inputAccessor = inputAccessors[i];
        const outputAccessor = outputAccessors[i];
        const sampler = samplers[i];
        const target = targets[i];
        if (node === void 0) continue;
        if (node.updateMatrix) {
          node.updateMatrix();
        }
        const createdTracks = parser._createAnimationTracks(node, inputAccessor, outputAccessor, sampler, target);
        if (createdTracks) {
          for (let k = 0; k < createdTracks.length; k++) {
            tracks.push(createdTracks[k]);
          }
        }
      }
      return new AnimationClip(animationName, void 0, tracks);
    });
  }
  createNodeMesh(nodeIndex) {
    const json = this.json;
    const parser = this;
    const nodeDef = json.nodes[nodeIndex];
    if (nodeDef.mesh === void 0) return null;
    return parser.getDependency("mesh", nodeDef.mesh).then(function(mesh) {
      const node = parser._getNodeRef(parser.meshCache, nodeDef.mesh, mesh);
      if (nodeDef.weights !== void 0) {
        node.traverse(function(o) {
          if (!o.isMesh) return;
          for (let i = 0, il = nodeDef.weights.length; i < il; i++) {
            o.morphTargetInfluences[i] = nodeDef.weights[i];
          }
        });
      }
      return node;
    });
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#nodes-and-hierarchy
   * @param {number} nodeIndex
   * @return {Promise<Object3D>}
   */
  loadNode(nodeIndex) {
    const json = this.json;
    const parser = this;
    const nodeDef = json.nodes[nodeIndex];
    const nodePending = parser._loadNodeShallow(nodeIndex);
    const childPending = [];
    const childrenDef = nodeDef.children || [];
    for (let i = 0, il = childrenDef.length; i < il; i++) {
      childPending.push(parser.getDependency("node", childrenDef[i]));
    }
    const skeletonPending = nodeDef.skin === void 0 ? Promise.resolve(null) : parser.getDependency("skin", nodeDef.skin);
    return Promise.all([
      nodePending,
      Promise.all(childPending),
      skeletonPending
    ]).then(function(results) {
      const node = results[0];
      const children = results[1];
      const skeleton = results[2];
      if (skeleton !== null) {
        node.traverse(function(mesh) {
          if (!mesh.isSkinnedMesh) return;
          mesh.bind(skeleton, _identityMatrix);
        });
      }
      for (let i = 0, il = children.length; i < il; i++) {
        node.add(children[i]);
      }
      return node;
    });
  }
  // ._loadNodeShallow() parses a single node.
  // skin and child nodes are created and added in .loadNode() (no '_' prefix).
  _loadNodeShallow(nodeIndex) {
    const json = this.json;
    const extensions = this.extensions;
    const parser = this;
    if (this.nodeCache[nodeIndex] !== void 0) {
      return this.nodeCache[nodeIndex];
    }
    const nodeDef = json.nodes[nodeIndex];
    const nodeName = nodeDef.name ? parser.createUniqueName(nodeDef.name) : "";
    const pending = [];
    const meshPromise = parser._invokeOne(function(ext) {
      return ext.createNodeMesh && ext.createNodeMesh(nodeIndex);
    });
    if (meshPromise) {
      pending.push(meshPromise);
    }
    if (nodeDef.camera !== void 0) {
      pending.push(parser.getDependency("camera", nodeDef.camera).then(function(camera) {
        return parser._getNodeRef(parser.cameraCache, nodeDef.camera, camera);
      }));
    }
    parser._invokeAll(function(ext) {
      return ext.createNodeAttachment && ext.createNodeAttachment(nodeIndex);
    }).forEach(function(promise) {
      pending.push(promise);
    });
    this.nodeCache[nodeIndex] = Promise.all(pending).then(function(objects) {
      let node;
      if (nodeDef.isBone === true) {
        node = new Bone();
      } else if (objects.length > 1) {
        node = new Group();
      } else if (objects.length === 1) {
        node = objects[0];
      } else {
        node = new Object3D();
      }
      if (node !== objects[0]) {
        for (let i = 0, il = objects.length; i < il; i++) {
          node.add(objects[i]);
        }
      }
      if (nodeDef.name) {
        node.userData.name = nodeDef.name;
        node.name = nodeName;
      }
      assignExtrasToUserData(node, nodeDef);
      if (nodeDef.extensions) addUnknownExtensionsToUserData(extensions, node, nodeDef);
      if (nodeDef.matrix !== void 0) {
        const matrix = new Matrix4();
        matrix.fromArray(nodeDef.matrix);
        node.applyMatrix4(matrix);
      } else {
        if (nodeDef.translation !== void 0) {
          node.position.fromArray(nodeDef.translation);
        }
        if (nodeDef.rotation !== void 0) {
          node.quaternion.fromArray(nodeDef.rotation);
        }
        if (nodeDef.scale !== void 0) {
          node.scale.fromArray(nodeDef.scale);
        }
      }
      if (!parser.associations.has(node)) {
        parser.associations.set(node, {});
      }
      parser.associations.get(node).nodes = nodeIndex;
      return node;
    });
    return this.nodeCache[nodeIndex];
  }
  /**
   * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes
   * @param {number} sceneIndex
   * @return {Promise<Group>}
   */
  loadScene(sceneIndex) {
    const extensions = this.extensions;
    const sceneDef = this.json.scenes[sceneIndex];
    const parser = this;
    const scene = new Group();
    if (sceneDef.name) scene.name = parser.createUniqueName(sceneDef.name);
    assignExtrasToUserData(scene, sceneDef);
    if (sceneDef.extensions) addUnknownExtensionsToUserData(extensions, scene, sceneDef);
    const nodeIds = sceneDef.nodes || [];
    const pending = [];
    for (let i = 0, il = nodeIds.length; i < il; i++) {
      pending.push(parser.getDependency("node", nodeIds[i]));
    }
    return Promise.all(pending).then(function(nodes) {
      for (let i = 0, il = nodes.length; i < il; i++) {
        scene.add(nodes[i]);
      }
      const reduceAssociations = /* @__PURE__ */ __name((node) => {
        const reducedAssociations = /* @__PURE__ */ new Map();
        for (const [key, value] of parser.associations) {
          if (key instanceof Material || key instanceof Texture) {
            reducedAssociations.set(key, value);
          }
        }
        node.traverse((node2) => {
          const mappings = parser.associations.get(node2);
          if (mappings != null) {
            reducedAssociations.set(node2, mappings);
          }
        });
        return reducedAssociations;
      }, "reduceAssociations");
      parser.associations = reduceAssociations(scene);
      return scene;
    });
  }
  _createAnimationTracks(node, inputAccessor, outputAccessor, sampler, target) {
    const tracks = [];
    const targetName = node.name ? node.name : node.uuid;
    const targetNames = [];
    if (PATH_PROPERTIES$1[target.path] === PATH_PROPERTIES$1.weights) {
      node.traverse(function(object) {
        if (object.morphTargetInfluences) {
          targetNames.push(object.name ? object.name : object.uuid);
        }
      });
    } else {
      targetNames.push(targetName);
    }
    let TypedKeyframeTrack;
    switch (PATH_PROPERTIES$1[target.path]) {
      case PATH_PROPERTIES$1.weights:
        TypedKeyframeTrack = NumberKeyframeTrack;
        break;
      case PATH_PROPERTIES$1.rotation:
        TypedKeyframeTrack = QuaternionKeyframeTrack;
        break;
      case PATH_PROPERTIES$1.position:
      case PATH_PROPERTIES$1.scale:
        TypedKeyframeTrack = VectorKeyframeTrack;
        break;
      default:
        switch (outputAccessor.itemSize) {
          case 1:
            TypedKeyframeTrack = NumberKeyframeTrack;
            break;
          case 2:
          case 3:
          default:
            TypedKeyframeTrack = VectorKeyframeTrack;
            break;
        }
        break;
    }
    const interpolation = sampler.interpolation !== void 0 ? INTERPOLATION[sampler.interpolation] : InterpolateLinear;
    const outputArray = this._getArrayFromAccessor(outputAccessor);
    for (let j = 0, jl = targetNames.length; j < jl; j++) {
      const track = new TypedKeyframeTrack(
        targetNames[j] + "." + PATH_PROPERTIES$1[target.path],
        inputAccessor.array,
        outputArray,
        interpolation
      );
      if (sampler.interpolation === "CUBICSPLINE") {
        this._createCubicSplineTrackInterpolant(track);
      }
      tracks.push(track);
    }
    return tracks;
  }
  _getArrayFromAccessor(accessor) {
    let outputArray = accessor.array;
    if (accessor.normalized) {
      const scale = getNormalizedComponentScale(outputArray.constructor);
      const scaled = new Float32Array(outputArray.length);
      for (let j = 0, jl = outputArray.length; j < jl; j++) {
        scaled[j] = outputArray[j] * scale;
      }
      outputArray = scaled;
    }
    return outputArray;
  }
  _createCubicSplineTrackInterpolant(track) {
    track.createInterpolant = /* @__PURE__ */ __name(function InterpolantFactoryMethodGLTFCubicSpline(result) {
      const interpolantType = this instanceof QuaternionKeyframeTrack ? GLTFCubicSplineQuaternionInterpolant : GLTFCubicSplineInterpolant;
      return new interpolantType(this.times, this.values, this.getValueSize() / 3, result);
    }, "InterpolantFactoryMethodGLTFCubicSpline");
    track.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline = true;
  }
}
function computeBounds(geometry, primitiveDef, parser) {
  const attributes = primitiveDef.attributes;
  const box = new Box3();
  if (attributes.POSITION !== void 0) {
    const accessor = parser.json.accessors[attributes.POSITION];
    const min = accessor.min;
    const max2 = accessor.max;
    if (min !== void 0 && max2 !== void 0) {
      box.set(
        new Vector3(min[0], min[1], min[2]),
        new Vector3(max2[0], max2[1], max2[2])
      );
      if (accessor.normalized) {
        const boxScale = getNormalizedComponentScale(WEBGL_COMPONENT_TYPES[accessor.componentType]);
        box.min.multiplyScalar(boxScale);
        box.max.multiplyScalar(boxScale);
      }
    } else {
      console.warn("THREE.GLTFLoader: Missing min/max properties for accessor POSITION.");
      return;
    }
  } else {
    return;
  }
  const targets = primitiveDef.targets;
  if (targets !== void 0) {
    const maxDisplacement = new Vector3();
    const vector = new Vector3();
    for (let i = 0, il = targets.length; i < il; i++) {
      const target = targets[i];
      if (target.POSITION !== void 0) {
        const accessor = parser.json.accessors[target.POSITION];
        const min = accessor.min;
        const max2 = accessor.max;
        if (min !== void 0 && max2 !== void 0) {
          vector.setX(Math.max(Math.abs(min[0]), Math.abs(max2[0])));
          vector.setY(Math.max(Math.abs(min[1]), Math.abs(max2[1])));
          vector.setZ(Math.max(Math.abs(min[2]), Math.abs(max2[2])));
          if (accessor.normalized) {
            const boxScale = getNormalizedComponentScale(WEBGL_COMPONENT_TYPES[accessor.componentType]);
            vector.multiplyScalar(boxScale);
          }
          maxDisplacement.max(vector);
        } else {
          console.warn("THREE.GLTFLoader: Missing min/max properties for accessor POSITION.");
        }
      }
    }
    box.expandByVector(maxDisplacement);
  }
  geometry.boundingBox = box;
  const sphere = new Sphere();
  box.getCenter(sphere.center);
  sphere.radius = box.min.distanceTo(box.max) / 2;
  geometry.boundingSphere = sphere;
}
__name(computeBounds, "computeBounds");
function addPrimitiveAttributes(geometry, primitiveDef, parser) {
  const attributes = primitiveDef.attributes;
  const pending = [];
  function assignAttributeAccessor(accessorIndex, attributeName) {
    return parser.getDependency("accessor", accessorIndex).then(function(accessor) {
      geometry.setAttribute(attributeName, accessor);
    });
  }
  __name(assignAttributeAccessor, "assignAttributeAccessor");
  for (const gltfAttributeName in attributes) {
    const threeAttributeName = ATTRIBUTES[gltfAttributeName] || gltfAttributeName.toLowerCase();
    if (threeAttributeName in geometry.attributes) continue;
    pending.push(assignAttributeAccessor(attributes[gltfAttributeName], threeAttributeName));
  }
  if (primitiveDef.indices !== void 0 && !geometry.index) {
    const accessor = parser.getDependency("accessor", primitiveDef.indices).then(function(accessor2) {
      geometry.setIndex(accessor2);
    });
    pending.push(accessor);
  }
  if (ColorManagement.workingColorSpace !== LinearSRGBColorSpace && "COLOR_0" in attributes) {
    console.warn(`THREE.GLTFLoader: Converting vertex colors from "srgb-linear" to "${ColorManagement.workingColorSpace}" not supported.`);
  }
  assignExtrasToUserData(geometry, primitiveDef);
  computeBounds(geometry, primitiveDef, parser);
  return Promise.all(pending).then(function() {
    return primitiveDef.targets !== void 0 ? addMorphTargets(geometry, primitiveDef.targets, parser) : geometry;
  });
}
__name(addPrimitiveAttributes, "addPrimitiveAttributes");
class MTLLoader extends Loader {
  static {
    __name(this, "MTLLoader");
  }
  constructor(manager) {
    super(manager);
  }
  /**
   * Loads and parses a MTL asset from a URL.
   *
   * @param {String} url - URL to the MTL file.
   * @param {Function} [onLoad] - Callback invoked with the loaded object.
   * @param {Function} [onProgress] - Callback for download progress.
   * @param {Function} [onError] - Callback for download errors.
   *
   * @see setPath setResourcePath
   *
   * @note In order for relative texture references to resolve correctly
   * you must call setResourcePath() explicitly prior to load.
   */
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const path = this.path === "" ? LoaderUtils.extractUrlBase(url) : this.path;
    const loader = new FileLoader(this.manager);
    loader.setPath(this.path);
    loader.setRequestHeader(this.requestHeader);
    loader.setWithCredentials(this.withCredentials);
    loader.load(url, function(text) {
      try {
        onLoad(scope.parse(text, path));
      } catch (e) {
        if (onError) {
          onError(e);
        } else {
          console.error(e);
        }
        scope.manager.itemError(url);
      }
    }, onProgress, onError);
  }
  setMaterialOptions(value) {
    this.materialOptions = value;
    return this;
  }
  /**
   * Parses a MTL file.
   *
   * @param {String} text - Content of MTL file
   * @return {MaterialCreator}
   *
   * @see setPath setResourcePath
   *
   * @note In order for relative texture references to resolve correctly
   * you must call setResourcePath() explicitly prior to parse.
   */
  parse(text, path) {
    const lines = text.split("\n");
    let info = {};
    const delimiter_pattern = /\s+/;
    const materialsInfo = {};
    for (let i = 0; i < lines.length; i++) {
      let line = lines[i];
      line = line.trim();
      if (line.length === 0 || line.charAt(0) === "#") {
        continue;
      }
      const pos = line.indexOf(" ");
      let key = pos >= 0 ? line.substring(0, pos) : line;
      key = key.toLowerCase();
      let value = pos >= 0 ? line.substring(pos + 1) : "";
      value = value.trim();
      if (key === "newmtl") {
        info = { name: value };
        materialsInfo[value] = info;
      } else {
        if (key === "ka" || key === "kd" || key === "ks" || key === "ke") {
          const ss = value.split(delimiter_pattern, 3);
          info[key] = [parseFloat(ss[0]), parseFloat(ss[1]), parseFloat(ss[2])];
        } else {
          info[key] = value;
        }
      }
    }
    const materialCreator = new MaterialCreator(this.resourcePath || path, this.materialOptions);
    materialCreator.setCrossOrigin(this.crossOrigin);
    materialCreator.setManager(this.manager);
    materialCreator.setMaterials(materialsInfo);
    return materialCreator;
  }
}
class MaterialCreator {
  static {
    __name(this, "MaterialCreator");
  }
  constructor(baseUrl = "", options = {}) {
    this.baseUrl = baseUrl;
    this.options = options;
    this.materialsInfo = {};
    this.materials = {};
    this.materialsArray = [];
    this.nameLookup = {};
    this.crossOrigin = "anonymous";
    this.side = this.options.side !== void 0 ? this.options.side : FrontSide;
    this.wrap = this.options.wrap !== void 0 ? this.options.wrap : RepeatWrapping;
  }
  setCrossOrigin(value) {
    this.crossOrigin = value;
    return this;
  }
  setManager(value) {
    this.manager = value;
  }
  setMaterials(materialsInfo) {
    this.materialsInfo = this.convert(materialsInfo);
    this.materials = {};
    this.materialsArray = [];
    this.nameLookup = {};
  }
  convert(materialsInfo) {
    if (!this.options) return materialsInfo;
    const converted = {};
    for (const mn in materialsInfo) {
      const mat = materialsInfo[mn];
      const covmat = {};
      converted[mn] = covmat;
      for (const prop in mat) {
        let save = true;
        let value = mat[prop];
        const lprop = prop.toLowerCase();
        switch (lprop) {
          case "kd":
          case "ka":
          case "ks":
            if (this.options && this.options.normalizeRGB) {
              value = [value[0] / 255, value[1] / 255, value[2] / 255];
            }
            if (this.options && this.options.ignoreZeroRGBs) {
              if (value[0] === 0 && value[1] === 0 && value[2] === 0) {
                save = false;
              }
            }
            break;
        }
        if (save) {
          covmat[lprop] = value;
        }
      }
    }
    return converted;
  }
  preload() {
    for (const mn in this.materialsInfo) {
      this.create(mn);
    }
  }
  getIndex(materialName) {
    return this.nameLookup[materialName];
  }
  getAsArray() {
    let index = 0;
    for (const mn in this.materialsInfo) {
      this.materialsArray[index] = this.create(mn);
      this.nameLookup[mn] = index;
      index++;
    }
    return this.materialsArray;
  }
  create(materialName) {
    if (this.materials[materialName] === void 0) {
      this.createMaterial_(materialName);
    }
    return this.materials[materialName];
  }
  createMaterial_(materialName) {
    const scope = this;
    const mat = this.materialsInfo[materialName];
    const params = {
      name: materialName,
      side: this.side
    };
    function resolveURL(baseUrl, url) {
      if (typeof url !== "string" || url === "")
        return "";
      if (/^https?:\/\//i.test(url)) return url;
      return baseUrl + url;
    }
    __name(resolveURL, "resolveURL");
    function setMapForType(mapType, value) {
      if (params[mapType]) return;
      const texParams = scope.getTextureParams(value, params);
      const map = scope.loadTexture(resolveURL(scope.baseUrl, texParams.url));
      map.repeat.copy(texParams.scale);
      map.offset.copy(texParams.offset);
      map.wrapS = scope.wrap;
      map.wrapT = scope.wrap;
      if (mapType === "map" || mapType === "emissiveMap") {
        map.colorSpace = SRGBColorSpace;
      }
      params[mapType] = map;
    }
    __name(setMapForType, "setMapForType");
    for (const prop in mat) {
      const value = mat[prop];
      let n;
      if (value === "") continue;
      switch (prop.toLowerCase()) {
        // Ns is material specular exponent
        case "kd":
          params.color = ColorManagement.toWorkingColorSpace(new Color().fromArray(value), SRGBColorSpace);
          break;
        case "ks":
          params.specular = ColorManagement.toWorkingColorSpace(new Color().fromArray(value), SRGBColorSpace);
          break;
        case "ke":
          params.emissive = ColorManagement.toWorkingColorSpace(new Color().fromArray(value), SRGBColorSpace);
          break;
        case "map_kd":
          setMapForType("map", value);
          break;
        case "map_ks":
          setMapForType("specularMap", value);
          break;
        case "map_ke":
          setMapForType("emissiveMap", value);
          break;
        case "norm":
          setMapForType("normalMap", value);
          break;
        case "map_bump":
        case "bump":
          setMapForType("bumpMap", value);
          break;
        case "map_d":
          setMapForType("alphaMap", value);
          params.transparent = true;
          break;
        case "ns":
          params.shininess = parseFloat(value);
          break;
        case "d":
          n = parseFloat(value);
          if (n < 1) {
            params.opacity = n;
            params.transparent = true;
          }
          break;
        case "tr":
          n = parseFloat(value);
          if (this.options && this.options.invertTrProperty) n = 1 - n;
          if (n > 0) {
            params.opacity = 1 - n;
            params.transparent = true;
          }
          break;
      }
    }
    this.materials[materialName] = new MeshPhongMaterial(params);
    return this.materials[materialName];
  }
  getTextureParams(value, matParams) {
    const texParams = {
      scale: new Vector2(1, 1),
      offset: new Vector2(0, 0)
    };
    const items = value.split(/\s+/);
    let pos;
    pos = items.indexOf("-bm");
    if (pos >= 0) {
      matParams.bumpScale = parseFloat(items[pos + 1]);
      items.splice(pos, 2);
    }
    pos = items.indexOf("-s");
    if (pos >= 0) {
      texParams.scale.set(parseFloat(items[pos + 1]), parseFloat(items[pos + 2]));
      items.splice(pos, 4);
    }
    pos = items.indexOf("-o");
    if (pos >= 0) {
      texParams.offset.set(parseFloat(items[pos + 1]), parseFloat(items[pos + 2]));
      items.splice(pos, 4);
    }
    texParams.url = items.join(" ").trim();
    return texParams;
  }
  loadTexture(url, mapping, onLoad, onProgress, onError) {
    const manager = this.manager !== void 0 ? this.manager : DefaultLoadingManager;
    let loader = manager.getHandler(url);
    if (loader === null) {
      loader = new TextureLoader(manager);
    }
    if (loader.setCrossOrigin) loader.setCrossOrigin(this.crossOrigin);
    const texture = loader.load(url, onLoad, onProgress, onError);
    if (mapping !== void 0) texture.mapping = mapping;
    return texture;
  }
}
const _object_pattern = /^[og]\s*(.+)?/;
const _material_library_pattern = /^mtllib /;
const _material_use_pattern = /^usemtl /;
const _map_use_pattern = /^usemap /;
const _face_vertex_data_separator_pattern = /\s+/;
const _vA = new Vector3();
const _vB = new Vector3();
const _vC = new Vector3();
const _ab = new Vector3();
const _cb = new Vector3();
const _color$1 = new Color();
function ParserState() {
  const state = {
    objects: [],
    object: {},
    vertices: [],
    normals: [],
    colors: [],
    uvs: [],
    materials: {},
    materialLibraries: [],
    startObject: /* @__PURE__ */ __name(function(name, fromDeclaration) {
      if (this.object && this.object.fromDeclaration === false) {
        this.object.name = name;
        this.object.fromDeclaration = fromDeclaration !== false;
        return;
      }
      const previousMaterial = this.object && typeof this.object.currentMaterial === "function" ? this.object.currentMaterial() : void 0;
      if (this.object && typeof this.object._finalize === "function") {
        this.object._finalize(true);
      }
      this.object = {
        name: name || "",
        fromDeclaration: fromDeclaration !== false,
        geometry: {
          vertices: [],
          normals: [],
          colors: [],
          uvs: [],
          hasUVIndices: false
        },
        materials: [],
        smooth: true,
        startMaterial: /* @__PURE__ */ __name(function(name2, libraries) {
          const previous = this._finalize(false);
          if (previous && (previous.inherited || previous.groupCount <= 0)) {
            this.materials.splice(previous.index, 1);
          }
          const material = {
            index: this.materials.length,
            name: name2 || "",
            mtllib: Array.isArray(libraries) && libraries.length > 0 ? libraries[libraries.length - 1] : "",
            smooth: previous !== void 0 ? previous.smooth : this.smooth,
            groupStart: previous !== void 0 ? previous.groupEnd : 0,
            groupEnd: -1,
            groupCount: -1,
            inherited: false,
            clone: /* @__PURE__ */ __name(function(index) {
              const cloned = {
                index: typeof index === "number" ? index : this.index,
                name: this.name,
                mtllib: this.mtllib,
                smooth: this.smooth,
                groupStart: 0,
                groupEnd: -1,
                groupCount: -1,
                inherited: false
              };
              cloned.clone = this.clone.bind(cloned);
              return cloned;
            }, "clone")
          };
          this.materials.push(material);
          return material;
        }, "startMaterial"),
        currentMaterial: /* @__PURE__ */ __name(function() {
          if (this.materials.length > 0) {
            return this.materials[this.materials.length - 1];
          }
          return void 0;
        }, "currentMaterial"),
        _finalize: /* @__PURE__ */ __name(function(end) {
          const lastMultiMaterial = this.currentMaterial();
          if (lastMultiMaterial && lastMultiMaterial.groupEnd === -1) {
            lastMultiMaterial.groupEnd = this.geometry.vertices.length / 3;
            lastMultiMaterial.groupCount = lastMultiMaterial.groupEnd - lastMultiMaterial.groupStart;
            lastMultiMaterial.inherited = false;
          }
          if (end && this.materials.length > 1) {
            for (let mi = this.materials.length - 1; mi >= 0; mi--) {
              if (this.materials[mi].groupCount <= 0) {
                this.materials.splice(mi, 1);
              }
            }
          }
          if (end && this.materials.length === 0) {
            this.materials.push({
              name: "",
              smooth: this.smooth
            });
          }
          return lastMultiMaterial;
        }, "_finalize")
      };
      if (previousMaterial && previousMaterial.name && typeof previousMaterial.clone === "function") {
        const declared = previousMaterial.clone(0);
        declared.inherited = true;
        this.object.materials.push(declared);
      }
      this.objects.push(this.object);
    }, "startObject"),
    finalize: /* @__PURE__ */ __name(function() {
      if (this.object && typeof this.object._finalize === "function") {
        this.object._finalize(true);
      }
    }, "finalize"),
    parseVertexIndex: /* @__PURE__ */ __name(function(value, len) {
      const index = parseInt(value, 10);
      return (index >= 0 ? index - 1 : index + len / 3) * 3;
    }, "parseVertexIndex"),
    parseNormalIndex: /* @__PURE__ */ __name(function(value, len) {
      const index = parseInt(value, 10);
      return (index >= 0 ? index - 1 : index + len / 3) * 3;
    }, "parseNormalIndex"),
    parseUVIndex: /* @__PURE__ */ __name(function(value, len) {
      const index = parseInt(value, 10);
      return (index >= 0 ? index - 1 : index + len / 2) * 2;
    }, "parseUVIndex"),
    addVertex: /* @__PURE__ */ __name(function(a, b, c) {
      const src = this.vertices;
      const dst = this.object.geometry.vertices;
      dst.push(src[a + 0], src[a + 1], src[a + 2]);
      dst.push(src[b + 0], src[b + 1], src[b + 2]);
      dst.push(src[c + 0], src[c + 1], src[c + 2]);
    }, "addVertex"),
    addVertexPoint: /* @__PURE__ */ __name(function(a) {
      const src = this.vertices;
      const dst = this.object.geometry.vertices;
      dst.push(src[a + 0], src[a + 1], src[a + 2]);
    }, "addVertexPoint"),
    addVertexLine: /* @__PURE__ */ __name(function(a) {
      const src = this.vertices;
      const dst = this.object.geometry.vertices;
      dst.push(src[a + 0], src[a + 1], src[a + 2]);
    }, "addVertexLine"),
    addNormal: /* @__PURE__ */ __name(function(a, b, c) {
      const src = this.normals;
      const dst = this.object.geometry.normals;
      dst.push(src[a + 0], src[a + 1], src[a + 2]);
      dst.push(src[b + 0], src[b + 1], src[b + 2]);
      dst.push(src[c + 0], src[c + 1], src[c + 2]);
    }, "addNormal"),
    addFaceNormal: /* @__PURE__ */ __name(function(a, b, c) {
      const src = this.vertices;
      const dst = this.object.geometry.normals;
      _vA.fromArray(src, a);
      _vB.fromArray(src, b);
      _vC.fromArray(src, c);
      _cb.subVectors(_vC, _vB);
      _ab.subVectors(_vA, _vB);
      _cb.cross(_ab);
      _cb.normalize();
      dst.push(_cb.x, _cb.y, _cb.z);
      dst.push(_cb.x, _cb.y, _cb.z);
      dst.push(_cb.x, _cb.y, _cb.z);
    }, "addFaceNormal"),
    addColor: /* @__PURE__ */ __name(function(a, b, c) {
      const src = this.colors;
      const dst = this.object.geometry.colors;
      if (src[a] !== void 0) dst.push(src[a + 0], src[a + 1], src[a + 2]);
      if (src[b] !== void 0) dst.push(src[b + 0], src[b + 1], src[b + 2]);
      if (src[c] !== void 0) dst.push(src[c + 0], src[c + 1], src[c + 2]);
    }, "addColor"),
    addUV: /* @__PURE__ */ __name(function(a, b, c) {
      const src = this.uvs;
      const dst = this.object.geometry.uvs;
      dst.push(src[a + 0], src[a + 1]);
      dst.push(src[b + 0], src[b + 1]);
      dst.push(src[c + 0], src[c + 1]);
    }, "addUV"),
    addDefaultUV: /* @__PURE__ */ __name(function() {
      const dst = this.object.geometry.uvs;
      dst.push(0, 0);
      dst.push(0, 0);
      dst.push(0, 0);
    }, "addDefaultUV"),
    addUVLine: /* @__PURE__ */ __name(function(a) {
      const src = this.uvs;
      const dst = this.object.geometry.uvs;
      dst.push(src[a + 0], src[a + 1]);
    }, "addUVLine"),
    addFace: /* @__PURE__ */ __name(function(a, b, c, ua, ub, uc, na, nb, nc) {
      const vLen = this.vertices.length;
      let ia = this.parseVertexIndex(a, vLen);
      let ib = this.parseVertexIndex(b, vLen);
      let ic = this.parseVertexIndex(c, vLen);
      this.addVertex(ia, ib, ic);
      this.addColor(ia, ib, ic);
      if (na !== void 0 && na !== "") {
        const nLen = this.normals.length;
        ia = this.parseNormalIndex(na, nLen);
        ib = this.parseNormalIndex(nb, nLen);
        ic = this.parseNormalIndex(nc, nLen);
        this.addNormal(ia, ib, ic);
      } else {
        this.addFaceNormal(ia, ib, ic);
      }
      if (ua !== void 0 && ua !== "") {
        const uvLen = this.uvs.length;
        ia = this.parseUVIndex(ua, uvLen);
        ib = this.parseUVIndex(ub, uvLen);
        ic = this.parseUVIndex(uc, uvLen);
        this.addUV(ia, ib, ic);
        this.object.geometry.hasUVIndices = true;
      } else {
        this.addDefaultUV();
      }
    }, "addFace"),
    addPointGeometry: /* @__PURE__ */ __name(function(vertices) {
      this.object.geometry.type = "Points";
      const vLen = this.vertices.length;
      for (let vi = 0, l = vertices.length; vi < l; vi++) {
        const index = this.parseVertexIndex(vertices[vi], vLen);
        this.addVertexPoint(index);
        this.addColor(index);
      }
    }, "addPointGeometry"),
    addLineGeometry: /* @__PURE__ */ __name(function(vertices, uvs) {
      this.object.geometry.type = "Line";
      const vLen = this.vertices.length;
      const uvLen = this.uvs.length;
      for (let vi = 0, l = vertices.length; vi < l; vi++) {
        this.addVertexLine(this.parseVertexIndex(vertices[vi], vLen));
      }
      for (let uvi = 0, l = uvs.length; uvi < l; uvi++) {
        this.addUVLine(this.parseUVIndex(uvs[uvi], uvLen));
      }
    }, "addLineGeometry")
  };
  state.startObject("", false);
  return state;
}
__name(ParserState, "ParserState");
class OBJLoader extends Loader {
  static {
    __name(this, "OBJLoader");
  }
  constructor(manager) {
    super(manager);
    this.materials = null;
  }
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const loader = new FileLoader(this.manager);
    loader.setPath(this.path);
    loader.setRequestHeader(this.requestHeader);
    loader.setWithCredentials(this.withCredentials);
    loader.load(url, function(text) {
      try {
        onLoad(scope.parse(text));
      } catch (e) {
        if (onError) {
          onError(e);
        } else {
          console.error(e);
        }
        scope.manager.itemError(url);
      }
    }, onProgress, onError);
  }
  setMaterials(materials) {
    this.materials = materials;
    return this;
  }
  parse(text) {
    const state = new ParserState();
    if (text.indexOf("\r\n") !== -1) {
      text = text.replace(/\r\n/g, "\n");
    }
    if (text.indexOf("\\\n") !== -1) {
      text = text.replace(/\\\n/g, "");
    }
    const lines = text.split("\n");
    let result = [];
    for (let i = 0, l = lines.length; i < l; i++) {
      const line = lines[i].trimStart();
      if (line.length === 0) continue;
      const lineFirstChar = line.charAt(0);
      if (lineFirstChar === "#") continue;
      if (lineFirstChar === "v") {
        const data = line.split(_face_vertex_data_separator_pattern);
        switch (data[0]) {
          case "v":
            state.vertices.push(
              parseFloat(data[1]),
              parseFloat(data[2]),
              parseFloat(data[3])
            );
            if (data.length >= 7) {
              _color$1.setRGB(
                parseFloat(data[4]),
                parseFloat(data[5]),
                parseFloat(data[6]),
                SRGBColorSpace
              );
              state.colors.push(_color$1.r, _color$1.g, _color$1.b);
            } else {
              state.colors.push(void 0, void 0, void 0);
            }
            break;
          case "vn":
            state.normals.push(
              parseFloat(data[1]),
              parseFloat(data[2]),
              parseFloat(data[3])
            );
            break;
          case "vt":
            state.uvs.push(
              parseFloat(data[1]),
              parseFloat(data[2])
            );
            break;
        }
      } else if (lineFirstChar === "f") {
        const lineData = line.slice(1).trim();
        const vertexData = lineData.split(_face_vertex_data_separator_pattern);
        const faceVertices = [];
        for (let j = 0, jl = vertexData.length; j < jl; j++) {
          const vertex2 = vertexData[j];
          if (vertex2.length > 0) {
            const vertexParts = vertex2.split("/");
            faceVertices.push(vertexParts);
          }
        }
        const v1 = faceVertices[0];
        for (let j = 1, jl = faceVertices.length - 1; j < jl; j++) {
          const v2 = faceVertices[j];
          const v3 = faceVertices[j + 1];
          state.addFace(
            v1[0],
            v2[0],
            v3[0],
            v1[1],
            v2[1],
            v3[1],
            v1[2],
            v2[2],
            v3[2]
          );
        }
      } else if (lineFirstChar === "l") {
        const lineParts = line.substring(1).trim().split(" ");
        let lineVertices = [];
        const lineUVs = [];
        if (line.indexOf("/") === -1) {
          lineVertices = lineParts;
        } else {
          for (let li = 0, llen = lineParts.length; li < llen; li++) {
            const parts = lineParts[li].split("/");
            if (parts[0] !== "") lineVertices.push(parts[0]);
            if (parts[1] !== "") lineUVs.push(parts[1]);
          }
        }
        state.addLineGeometry(lineVertices, lineUVs);
      } else if (lineFirstChar === "p") {
        const lineData = line.slice(1).trim();
        const pointData = lineData.split(" ");
        state.addPointGeometry(pointData);
      } else if ((result = _object_pattern.exec(line)) !== null) {
        const name = (" " + result[0].slice(1).trim()).slice(1);
        state.startObject(name);
      } else if (_material_use_pattern.test(line)) {
        state.object.startMaterial(line.substring(7).trim(), state.materialLibraries);
      } else if (_material_library_pattern.test(line)) {
        state.materialLibraries.push(line.substring(7).trim());
      } else if (_map_use_pattern.test(line)) {
        console.warn('THREE.OBJLoader: Rendering identifier "usemap" not supported. Textures must be defined in MTL files.');
      } else if (lineFirstChar === "s") {
        result = line.split(" ");
        if (result.length > 1) {
          const value = result[1].trim().toLowerCase();
          state.object.smooth = value !== "0" && value !== "off";
        } else {
          state.object.smooth = true;
        }
        const material = state.object.currentMaterial();
        if (material) material.smooth = state.object.smooth;
      } else {
        if (line === "\0") continue;
        console.warn('THREE.OBJLoader: Unexpected line: "' + line + '"');
      }
    }
    state.finalize();
    const container = new Group();
    container.materialLibraries = [].concat(state.materialLibraries);
    const hasPrimitives = !(state.objects.length === 1 && state.objects[0].geometry.vertices.length === 0);
    if (hasPrimitives === true) {
      for (let i = 0, l = state.objects.length; i < l; i++) {
        const object = state.objects[i];
        const geometry = object.geometry;
        const materials = object.materials;
        const isLine = geometry.type === "Line";
        const isPoints = geometry.type === "Points";
        let hasVertexColors = false;
        if (geometry.vertices.length === 0) continue;
        const buffergeometry = new BufferGeometry();
        buffergeometry.setAttribute("position", new Float32BufferAttribute(geometry.vertices, 3));
        if (geometry.normals.length > 0) {
          buffergeometry.setAttribute("normal", new Float32BufferAttribute(geometry.normals, 3));
        }
        if (geometry.colors.length > 0) {
          hasVertexColors = true;
          buffergeometry.setAttribute("color", new Float32BufferAttribute(geometry.colors, 3));
        }
        if (geometry.hasUVIndices === true) {
          buffergeometry.setAttribute("uv", new Float32BufferAttribute(geometry.uvs, 2));
        }
        const createdMaterials = [];
        for (let mi = 0, miLen = materials.length; mi < miLen; mi++) {
          const sourceMaterial = materials[mi];
          const materialHash = sourceMaterial.name + "_" + sourceMaterial.smooth + "_" + hasVertexColors;
          let material = state.materials[materialHash];
          if (this.materials !== null) {
            material = this.materials.create(sourceMaterial.name);
            if (isLine && material && !(material instanceof LineBasicMaterial)) {
              const materialLine = new LineBasicMaterial();
              Material.prototype.copy.call(materialLine, material);
              materialLine.color.copy(material.color);
              material = materialLine;
            } else if (isPoints && material && !(material instanceof PointsMaterial)) {
              const materialPoints = new PointsMaterial({ size: 10, sizeAttenuation: false });
              Material.prototype.copy.call(materialPoints, material);
              materialPoints.color.copy(material.color);
              materialPoints.map = material.map;
              material = materialPoints;
            }
          }
          if (material === void 0) {
            if (isLine) {
              material = new LineBasicMaterial();
            } else if (isPoints) {
              material = new PointsMaterial({ size: 1, sizeAttenuation: false });
            } else {
              material = new MeshPhongMaterial();
            }
            material.name = sourceMaterial.name;
            material.flatShading = sourceMaterial.smooth ? false : true;
            material.vertexColors = hasVertexColors;
            state.materials[materialHash] = material;
          }
          createdMaterials.push(material);
        }
        let mesh;
        if (createdMaterials.length > 1) {
          for (let mi = 0, miLen = materials.length; mi < miLen; mi++) {
            const sourceMaterial = materials[mi];
            buffergeometry.addGroup(sourceMaterial.groupStart, sourceMaterial.groupCount, mi);
          }
          if (isLine) {
            mesh = new LineSegments(buffergeometry, createdMaterials);
          } else if (isPoints) {
            mesh = new Points(buffergeometry, createdMaterials);
          } else {
            mesh = new Mesh(buffergeometry, createdMaterials);
          }
        } else {
          if (isLine) {
            mesh = new LineSegments(buffergeometry, createdMaterials[0]);
          } else if (isPoints) {
            mesh = new Points(buffergeometry, createdMaterials[0]);
          } else {
            mesh = new Mesh(buffergeometry, createdMaterials[0]);
          }
        }
        mesh.name = object.name;
        container.add(mesh);
      }
    } else {
      if (state.vertices.length > 0) {
        const material = new PointsMaterial({ size: 1, sizeAttenuation: false });
        const buffergeometry = new BufferGeometry();
        buffergeometry.setAttribute("position", new Float32BufferAttribute(state.vertices, 3));
        if (state.colors.length > 0 && state.colors[0] !== void 0) {
          buffergeometry.setAttribute("color", new Float32BufferAttribute(state.colors, 3));
          material.vertexColors = true;
        }
        const points = new Points(buffergeometry, material);
        container.add(points);
      }
    }
    return container;
  }
}
class STLLoader extends Loader {
  static {
    __name(this, "STLLoader");
  }
  constructor(manager) {
    super(manager);
  }
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const loader = new FileLoader(this.manager);
    loader.setPath(this.path);
    loader.setResponseType("arraybuffer");
    loader.setRequestHeader(this.requestHeader);
    loader.setWithCredentials(this.withCredentials);
    loader.load(url, function(text) {
      try {
        onLoad(scope.parse(text));
      } catch (e) {
        if (onError) {
          onError(e);
        } else {
          console.error(e);
        }
        scope.manager.itemError(url);
      }
    }, onProgress, onError);
  }
  parse(data) {
    function isBinary(data2) {
      const reader = new DataView(data2);
      const face_size = 32 / 8 * 3 + 32 / 8 * 3 * 3 + 16 / 8;
      const n_faces = reader.getUint32(80, true);
      const expect = 80 + 32 / 8 + n_faces * face_size;
      if (expect === reader.byteLength) {
        return true;
      }
      const solid = [115, 111, 108, 105, 100];
      for (let off = 0; off < 5; off++) {
        if (matchDataViewAt(solid, reader, off)) return false;
      }
      return true;
    }
    __name(isBinary, "isBinary");
    function matchDataViewAt(query, reader, offset) {
      for (let i = 0, il = query.length; i < il; i++) {
        if (query[i] !== reader.getUint8(offset + i)) return false;
      }
      return true;
    }
    __name(matchDataViewAt, "matchDataViewAt");
    function parseBinary(data2) {
      const reader = new DataView(data2);
      const faces = reader.getUint32(80, true);
      let r, g, b, hasColors = false, colors;
      let defaultR, defaultG, defaultB, alpha;
      for (let index = 0; index < 80 - 10; index++) {
        if (reader.getUint32(index, false) == 1129270351 && reader.getUint8(index + 4) == 82 && reader.getUint8(index + 5) == 61) {
          hasColors = true;
          colors = new Float32Array(faces * 3 * 3);
          defaultR = reader.getUint8(index + 6) / 255;
          defaultG = reader.getUint8(index + 7) / 255;
          defaultB = reader.getUint8(index + 8) / 255;
          alpha = reader.getUint8(index + 9) / 255;
        }
      }
      const dataOffset = 84;
      const faceLength = 12 * 4 + 2;
      const geometry = new BufferGeometry();
      const vertices = new Float32Array(faces * 3 * 3);
      const normals = new Float32Array(faces * 3 * 3);
      const color = new Color();
      for (let face = 0; face < faces; face++) {
        const start = dataOffset + face * faceLength;
        const normalX = reader.getFloat32(start, true);
        const normalY = reader.getFloat32(start + 4, true);
        const normalZ = reader.getFloat32(start + 8, true);
        if (hasColors) {
          const packedColor2 = reader.getUint16(start + 48, true);
          if ((packedColor2 & 32768) === 0) {
            r = (packedColor2 & 31) / 31;
            g = (packedColor2 >> 5 & 31) / 31;
            b = (packedColor2 >> 10 & 31) / 31;
          } else {
            r = defaultR;
            g = defaultG;
            b = defaultB;
          }
        }
        for (let i = 1; i <= 3; i++) {
          const vertexstart = start + i * 12;
          const componentIdx = face * 3 * 3 + (i - 1) * 3;
          vertices[componentIdx] = reader.getFloat32(vertexstart, true);
          vertices[componentIdx + 1] = reader.getFloat32(vertexstart + 4, true);
          vertices[componentIdx + 2] = reader.getFloat32(vertexstart + 8, true);
          normals[componentIdx] = normalX;
          normals[componentIdx + 1] = normalY;
          normals[componentIdx + 2] = normalZ;
          if (hasColors) {
            color.setRGB(r, g, b, SRGBColorSpace);
            colors[componentIdx] = color.r;
            colors[componentIdx + 1] = color.g;
            colors[componentIdx + 2] = color.b;
          }
        }
      }
      geometry.setAttribute("position", new BufferAttribute(vertices, 3));
      geometry.setAttribute("normal", new BufferAttribute(normals, 3));
      if (hasColors) {
        geometry.setAttribute("color", new BufferAttribute(colors, 3));
        geometry.hasColors = true;
        geometry.alpha = alpha;
      }
      return geometry;
    }
    __name(parseBinary, "parseBinary");
    function parseASCII(data2) {
      const geometry = new BufferGeometry();
      const patternSolid = /solid([\s\S]*?)endsolid/g;
      const patternFace = /facet([\s\S]*?)endfacet/g;
      const patternName = /solid\s(.+)/;
      let faceCounter = 0;
      const patternFloat = /[\s]+([+-]?(?:\d*)(?:\.\d*)?(?:[eE][+-]?\d+)?)/.source;
      const patternVertex = new RegExp("vertex" + patternFloat + patternFloat + patternFloat, "g");
      const patternNormal = new RegExp("normal" + patternFloat + patternFloat + patternFloat, "g");
      const vertices = [];
      const normals = [];
      const groupNames = [];
      const normal = new Vector3();
      let result;
      let groupCount = 0;
      let startVertex = 0;
      let endVertex = 0;
      while ((result = patternSolid.exec(data2)) !== null) {
        startVertex = endVertex;
        const solid = result[0];
        const name = (result = patternName.exec(solid)) !== null ? result[1] : "";
        groupNames.push(name);
        while ((result = patternFace.exec(solid)) !== null) {
          let vertexCountPerFace = 0;
          let normalCountPerFace = 0;
          const text = result[0];
          while ((result = patternNormal.exec(text)) !== null) {
            normal.x = parseFloat(result[1]);
            normal.y = parseFloat(result[2]);
            normal.z = parseFloat(result[3]);
            normalCountPerFace++;
          }
          while ((result = patternVertex.exec(text)) !== null) {
            vertices.push(parseFloat(result[1]), parseFloat(result[2]), parseFloat(result[3]));
            normals.push(normal.x, normal.y, normal.z);
            vertexCountPerFace++;
            endVertex++;
          }
          if (normalCountPerFace !== 1) {
            console.error("THREE.STLLoader: Something isn't right with the normal of face number " + faceCounter);
          }
          if (vertexCountPerFace !== 3) {
            console.error("THREE.STLLoader: Something isn't right with the vertices of face number " + faceCounter);
          }
          faceCounter++;
        }
        const start = startVertex;
        const count = endVertex - startVertex;
        geometry.userData.groupNames = groupNames;
        geometry.addGroup(start, count, groupCount);
        groupCount++;
      }
      geometry.setAttribute("position", new Float32BufferAttribute(vertices, 3));
      geometry.setAttribute("normal", new Float32BufferAttribute(normals, 3));
      return geometry;
    }
    __name(parseASCII, "parseASCII");
    function ensureString(buffer) {
      if (typeof buffer !== "string") {
        return new TextDecoder().decode(buffer);
      }
      return buffer;
    }
    __name(ensureString, "ensureString");
    function ensureBinary(buffer) {
      if (typeof buffer === "string") {
        const array_buffer = new Uint8Array(buffer.length);
        for (let i = 0; i < buffer.length; i++) {
          array_buffer[i] = buffer.charCodeAt(i) & 255;
        }
        return array_buffer.buffer || array_buffer;
      } else {
        return buffer;
      }
    }
    __name(ensureBinary, "ensureBinary");
    const binData = ensureBinary(data);
    return isBinary(binData) ? parseBinary(binData) : parseASCII(ensureString(data));
  }
}
const _camera = new OrthographicCamera(-1, 1, 1, -1, 0, 1);
class FullscreenTriangleGeometry extends BufferGeometry {
  static {
    __name(this, "FullscreenTriangleGeometry");
  }
  constructor() {
    super();
    this.setAttribute("position", new Float32BufferAttribute([-1, 3, 0, -1, -1, 0, 3, -1, 0], 3));
    this.setAttribute("uv", new Float32BufferAttribute([0, 2, 0, 0, 2, 0], 2));
  }
}
const _geometry = new FullscreenTriangleGeometry();
class FullScreenQuad {
  static {
    __name(this, "FullScreenQuad");
  }
  /**
   * Constructs a new full screen quad.
   *
   * @param {?Material} material - The material to render te full screen quad with.
   */
  constructor(material) {
    this._mesh = new Mesh(_geometry, material);
  }
  /**
   * Frees the GPU-related resources allocated by this instance. Call this
   * method whenever the instance is no longer used in your app.
   */
  dispose() {
    this._mesh.geometry.dispose();
  }
  /**
   * Renders the full screen quad.
   *
   * @param {WebGLRenderer} renderer - The renderer.
   */
  render(renderer) {
    renderer.render(this._mesh, _camera);
  }
  /**
   * The quad's material.
   *
   * @type {?Material}
   */
  get material() {
    return this._mesh.material;
  }
  set material(value) {
    this._mesh.material = value;
  }
}
var u8 = Uint8Array, u16 = Uint16Array, i32 = Int32Array;
var fleb = new u8([
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  0,
  1,
  1,
  1,
  1,
  2,
  2,
  2,
  2,
  3,
  3,
  3,
  3,
  4,
  4,
  4,
  4,
  5,
  5,
  5,
  5,
  0,
  /* unused */
  0,
  0,
  /* impossible */
  0
]);
var fdeb = new u8([
  0,
  0,
  0,
  0,
  1,
  1,
  2,
  2,
  3,
  3,
  4,
  4,
  5,
  5,
  6,
  6,
  7,
  7,
  8,
  8,
  9,
  9,
  10,
  10,
  11,
  11,
  12,
  12,
  13,
  13,
  /* unused */
  0,
  0
]);
var clim = new u8([16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15]);
var freb = /* @__PURE__ */ __name(function(eb, start) {
  var b = new u16(31);
  for (var i = 0; i < 31; ++i) {
    b[i] = start += 1 << eb[i - 1];
  }
  var r = new i32(b[30]);
  for (var i = 1; i < 30; ++i) {
    for (var j = b[i]; j < b[i + 1]; ++j) {
      r[j] = j - b[i] << 5 | i;
    }
  }
  return { b, r };
}, "freb");
var _a = freb(fleb, 2), fl = _a.b, revfl = _a.r;
fl[28] = 258, revfl[258] = 28;
var _b = freb(fdeb, 0), fd = _b.b;
var rev = new u16(32768);
for (var i = 0; i < 32768; ++i) {
  var x = (i & 43690) >> 1 | (i & 21845) << 1;
  x = (x & 52428) >> 2 | (x & 13107) << 2;
  x = (x & 61680) >> 4 | (x & 3855) << 4;
  rev[i] = ((x & 65280) >> 8 | (x & 255) << 8) >> 1;
}
var hMap = /* @__PURE__ */ __name(function(cd, mb, r) {
  var s = cd.length;
  var i = 0;
  var l = new u16(mb);
  for (; i < s; ++i) {
    if (cd[i])
      ++l[cd[i] - 1];
  }
  var le = new u16(mb);
  for (i = 1; i < mb; ++i) {
    le[i] = le[i - 1] + l[i - 1] << 1;
  }
  var co;
  {
    co = new u16(1 << mb);
    var rvb = 15 - mb;
    for (i = 0; i < s; ++i) {
      if (cd[i]) {
        var sv = i << 4 | cd[i];
        var r_1 = mb - cd[i];
        var v = le[cd[i] - 1]++ << r_1;
        for (var m = v | (1 << r_1) - 1; v <= m; ++v) {
          co[rev[v] >> rvb] = sv;
        }
      }
    }
  }
  return co;
}, "hMap");
var flt = new u8(288);
for (var i = 0; i < 144; ++i)
  flt[i] = 8;
for (var i = 144; i < 256; ++i)
  flt[i] = 9;
for (var i = 256; i < 280; ++i)
  flt[i] = 7;
for (var i = 280; i < 288; ++i)
  flt[i] = 8;
var fdt = new u8(32);
for (var i = 0; i < 32; ++i)
  fdt[i] = 5;
var flrm = /* @__PURE__ */ hMap(flt, 9);
var fdrm = /* @__PURE__ */ hMap(fdt, 5);
var max$1 = /* @__PURE__ */ __name(function(a) {
  var m = a[0];
  for (var i = 1; i < a.length; ++i) {
    if (a[i] > m)
      m = a[i];
  }
  return m;
}, "max$1");
var bits = /* @__PURE__ */ __name(function(d, p, m) {
  var o = p / 8 | 0;
  return (d[o] | d[o + 1] << 8) >> (p & 7) & m;
}, "bits");
var bits16 = /* @__PURE__ */ __name(function(d, p) {
  var o = p / 8 | 0;
  return (d[o] | d[o + 1] << 8 | d[o + 2] << 16) >> (p & 7);
}, "bits16");
var shft = /* @__PURE__ */ __name(function(p) {
  return (p + 7) / 8 | 0;
}, "shft");
var slc = /* @__PURE__ */ __name(function(v, s, e) {
  if (s == null || s < 0)
    s = 0;
  if (e == null || e > v.length)
    e = v.length;
  return new u8(v.subarray(s, e));
}, "slc");
var ec = [
  "unexpected EOF",
  "invalid block type",
  "invalid length/literal",
  "invalid distance",
  "stream finished",
  "no stream handler",
  ,
  "no callback",
  "invalid UTF-8 data",
  "extra field too long",
  "date not in range 1980-2099",
  "filename too long",
  "stream finishing",
  "invalid zip data"
  // determined by unknown compression method
];
var err = /* @__PURE__ */ __name(function(ind, msg, nt) {
  var e = new Error(msg || ec[ind]);
  e.code = ind;
  if (Error.captureStackTrace)
    Error.captureStackTrace(e, err);
  if (!nt)
    throw e;
  return e;
}, "err");
var inflt = /* @__PURE__ */ __name(function(dat, st, buf, dict) {
  var sl = dat.length, dl = dict ? dict.length : 0;
  if (!sl || st.f && !st.l)
    return buf || new u8(0);
  var noBuf = !buf;
  var resize = noBuf || st.i != 2;
  var noSt = st.i;
  if (noBuf)
    buf = new u8(sl * 3);
  var cbuf = /* @__PURE__ */ __name(function(l2) {
    var bl = buf.length;
    if (l2 > bl) {
      var nbuf = new u8(Math.max(bl * 2, l2));
      nbuf.set(buf);
      buf = nbuf;
    }
  }, "cbuf");
  var final = st.f || 0, pos = st.p || 0, bt = st.b || 0, lm = st.l, dm = st.d, lbt = st.m, dbt = st.n;
  var tbts = sl * 8;
  do {
    if (!lm) {
      final = bits(dat, pos, 1);
      var type = bits(dat, pos + 1, 3);
      pos += 3;
      if (!type) {
        var s = shft(pos) + 4, l = dat[s - 4] | dat[s - 3] << 8, t = s + l;
        if (t > sl) {
          if (noSt)
            err(0);
          break;
        }
        if (resize)
          cbuf(bt + l);
        buf.set(dat.subarray(s, t), bt);
        st.b = bt += l, st.p = pos = t * 8, st.f = final;
        continue;
      } else if (type == 1)
        lm = flrm, dm = fdrm, lbt = 9, dbt = 5;
      else if (type == 2) {
        var hLit = bits(dat, pos, 31) + 257, hcLen = bits(dat, pos + 10, 15) + 4;
        var tl = hLit + bits(dat, pos + 5, 31) + 1;
        pos += 14;
        var ldt = new u8(tl);
        var clt = new u8(19);
        for (var i = 0; i < hcLen; ++i) {
          clt[clim[i]] = bits(dat, pos + i * 3, 7);
        }
        pos += hcLen * 3;
        var clb = max$1(clt), clbmsk = (1 << clb) - 1;
        var clm = hMap(clt, clb);
        for (var i = 0; i < tl; ) {
          var r = clm[bits(dat, pos, clbmsk)];
          pos += r & 15;
          var s = r >> 4;
          if (s < 16) {
            ldt[i++] = s;
          } else {
            var c = 0, n = 0;
            if (s == 16)
              n = 3 + bits(dat, pos, 3), pos += 2, c = ldt[i - 1];
            else if (s == 17)
              n = 3 + bits(dat, pos, 7), pos += 3;
            else if (s == 18)
              n = 11 + bits(dat, pos, 127), pos += 7;
            while (n--)
              ldt[i++] = c;
          }
        }
        var lt = ldt.subarray(0, hLit), dt = ldt.subarray(hLit);
        lbt = max$1(lt);
        dbt = max$1(dt);
        lm = hMap(lt, lbt);
        dm = hMap(dt, dbt);
      } else
        err(1);
      if (pos > tbts) {
        if (noSt)
          err(0);
        break;
      }
    }
    if (resize)
      cbuf(bt + 131072);
    var lms = (1 << lbt) - 1, dms = (1 << dbt) - 1;
    var lpos = pos;
    for (; ; lpos = pos) {
      var c = lm[bits16(dat, pos) & lms], sym = c >> 4;
      pos += c & 15;
      if (pos > tbts) {
        if (noSt)
          err(0);
        break;
      }
      if (!c)
        err(2);
      if (sym < 256)
        buf[bt++] = sym;
      else if (sym == 256) {
        lpos = pos, lm = null;
        break;
      } else {
        var add2 = sym - 254;
        if (sym > 264) {
          var i = sym - 257, b = fleb[i];
          add2 = bits(dat, pos, (1 << b) - 1) + fl[i];
          pos += b;
        }
        var d = dm[bits16(dat, pos) & dms], dsym = d >> 4;
        if (!d)
          err(3);
        pos += d & 15;
        var dt = fd[dsym];
        if (dsym > 3) {
          var b = fdeb[dsym];
          dt += bits16(dat, pos) & (1 << b) - 1, pos += b;
        }
        if (pos > tbts) {
          if (noSt)
            err(0);
          break;
        }
        if (resize)
          cbuf(bt + 131072);
        var end = bt + add2;
        if (bt < dt) {
          var shift = dl - dt, dend = Math.min(dt, end);
          if (shift + bt < 0)
            err(3);
          for (; bt < dend; ++bt)
            buf[bt] = dict[shift + bt];
        }
        for (; bt < end; ++bt)
          buf[bt] = buf[bt - dt];
      }
    }
    st.l = lm, st.p = lpos, st.b = bt, st.f = final;
    if (lm)
      final = 1, st.m = lbt, st.d = dm, st.n = dbt;
  } while (!final);
  return bt != buf.length && noBuf ? slc(buf, 0, bt) : buf.subarray(0, bt);
}, "inflt");
var et = /* @__PURE__ */ new u8(0);
var b2 = /* @__PURE__ */ __name(function(d, b) {
  return d[b] | d[b + 1] << 8;
}, "b2");
var b4 = /* @__PURE__ */ __name(function(d, b) {
  return (d[b] | d[b + 1] << 8 | d[b + 2] << 16 | d[b + 3] << 24) >>> 0;
}, "b4");
var b8 = /* @__PURE__ */ __name(function(d, b) {
  return b4(d, b) + b4(d, b + 4) * 4294967296;
}, "b8");
var gzs = /* @__PURE__ */ __name(function(d) {
  if (d[0] != 31 || d[1] != 139 || d[2] != 8)
    err(6, "invalid gzip data");
  var flg = d[3];
  var st = 10;
  if (flg & 4)
    st += (d[10] | d[11] << 8) + 2;
  for (var zs = (flg >> 3 & 1) + (flg >> 4 & 1); zs > 0; zs -= !d[st++])
    ;
  return st + (flg & 2);
}, "gzs");
var Inflate = /* @__PURE__ */ (function() {
  function Inflate2(opts, cb) {
    if (typeof opts == "function")
      cb = opts, opts = {};
    this.ondata = cb;
    var dict = opts && opts.dictionary && opts.dictionary.subarray(-32768);
    this.s = { i: 0, b: dict ? dict.length : 0 };
    this.o = new u8(32768);
    this.p = new u8(0);
    if (dict)
      this.o.set(dict);
  }
  __name(Inflate2, "Inflate2");
  Inflate2.prototype.e = function(c) {
    if (!this.ondata)
      err(5);
    if (this.d)
      err(4);
    if (!this.p.length)
      this.p = c;
    else if (c.length) {
      var n = new u8(this.p.length + c.length);
      n.set(this.p), n.set(c, this.p.length), this.p = n;
    }
  };
  Inflate2.prototype.c = function(final) {
    this.s.i = +(this.d = final || false);
    var bts = this.s.b;
    var dt = inflt(this.p, this.s, this.o);
    this.ondata(slc(dt, bts, this.s.b), this.d);
    this.o = slc(dt, this.s.b - 32768), this.s.b = this.o.length;
    this.p = slc(this.p, this.s.p / 8 | 0), this.s.p &= 7;
  };
  Inflate2.prototype.push = function(chunk, final) {
    this.e(chunk), this.c(final);
  };
  return Inflate2;
})();
function inflateSync(data, opts) {
  return inflt(data, { i: 2 }, opts && opts.out, opts && opts.dictionary);
}
__name(inflateSync, "inflateSync");
var Gunzip = /* @__PURE__ */ (function() {
  function Gunzip2(opts, cb) {
    this.v = 1;
    this.r = 0;
    Inflate.call(this, opts, cb);
  }
  __name(Gunzip2, "Gunzip2");
  Gunzip2.prototype.push = function(chunk, final) {
    Inflate.prototype.e.call(this, chunk);
    this.r += chunk.length;
    if (this.v) {
      var p = this.p.subarray(this.v - 1);
      var s = p.length > 3 ? gzs(p) : 4;
      if (s > p.length) {
        if (!final)
          return;
      } else if (this.v > 1 && this.onmember) {
        this.onmember(this.r - p.length);
      }
      this.p = p.subarray(s), this.v = 0;
    }
    Inflate.prototype.c.call(this, final);
    if (this.s.f && !this.s.l && !final) {
      this.v = shft(this.s.p) + 9;
      this.s = { i: 0 };
      this.o = new u8(0);
      this.push(new u8(0), final);
    }
  };
  return Gunzip2;
})();
var td = typeof TextDecoder != "undefined" && /* @__PURE__ */ new TextDecoder();
var tds = 0;
try {
  td.decode(et, { stream: true });
  tds = 1;
} catch (e) {
}
var dutf8 = /* @__PURE__ */ __name(function(d) {
  for (var r = "", i = 0; ; ) {
    var c = d[i++];
    var eb = (c > 127) + (c > 223) + (c > 239);
    if (i + eb > d.length)
      return { s: r, r: slc(d, i - 1) };
    if (!eb)
      r += String.fromCharCode(c);
    else if (eb == 3) {
      c = ((c & 15) << 18 | (d[i++] & 63) << 12 | (d[i++] & 63) << 6 | d[i++] & 63) - 65536, r += String.fromCharCode(55296 | c >> 10, 56320 | c & 1023);
    } else if (eb & 1)
      r += String.fromCharCode((c & 31) << 6 | d[i++] & 63);
    else
      r += String.fromCharCode((c & 15) << 12 | (d[i++] & 63) << 6 | d[i++] & 63);
  }
}, "dutf8");
function strFromU8(dat, latin1) {
  if (latin1) {
    var r = "";
    for (var i = 0; i < dat.length; i += 16384)
      r += String.fromCharCode.apply(null, dat.subarray(i, i + 16384));
    return r;
  } else if (td) {
    return td.decode(dat);
  } else {
    var _a2 = dutf8(dat), s = _a2.s, r = _a2.r;
    if (r.length)
      err(8);
    return s;
  }
}
__name(strFromU8, "strFromU8");
var slzh = /* @__PURE__ */ __name(function(d, b) {
  return b + 30 + b2(d, b + 26) + b2(d, b + 28);
}, "slzh");
var zh = /* @__PURE__ */ __name(function(d, b, z) {
  var fnl = b2(d, b + 28), fn = strFromU8(d.subarray(b + 46, b + 46 + fnl), !(b2(d, b + 8) & 2048)), es = b + 46 + fnl, bs = b4(d, b + 20);
  var _a2 = z && bs == 4294967295 ? z64e(d, es) : [bs, b4(d, b + 24), b4(d, b + 42)], sc = _a2[0], su = _a2[1], off = _a2[2];
  return [b2(d, b + 10), sc, su, fn, es + b2(d, b + 30) + b2(d, b + 32), off];
}, "zh");
var z64e = /* @__PURE__ */ __name(function(d, b) {
  for (; b2(d, b) != 1; b += 4 + b2(d, b + 2))
    ;
  return [b8(d, b + 12), b8(d, b + 4), b8(d, b + 20)];
}, "z64e");
function unzipSync(data, opts) {
  var files = {};
  var e = data.length - 22;
  for (; b4(data, e) != 101010256; --e) {
    if (!e || data.length - e > 65558)
      err(13);
  }
  var c = b2(data, e + 8);
  if (!c)
    return {};
  var o = b4(data, e + 16);
  var z = o == 4294967295 || c == 65535;
  if (z) {
    var ze = b4(data, e - 12);
    z = b4(data, ze) == 101075792;
    if (z) {
      c = b4(data, ze + 32);
      o = b4(data, ze + 48);
    }
  }
  var fltr = opts && opts.filter;
  for (var i = 0; i < c; ++i) {
    var _a2 = zh(data, o, z), c_2 = _a2[0], sc = _a2[1], su = _a2[2], fn = _a2[3], no = _a2[4], off = _a2[5], b = slzh(data, off);
    o = no;
    if (!fltr || fltr({
      name: fn,
      size: sc,
      originalSize: su,
      compression: c_2
    })) {
      if (!c_2)
        files[fn] = slc(data, b, b + sc);
      else if (c_2 == 8)
        files[fn] = inflateSync(data.subarray(b, b + sc), { out: new u8(su) });
      else
        err(14, "unknown compression type " + c_2);
    }
  }
  return files;
}
__name(unzipSync, "unzipSync");
let wasm;
const cachedTextDecoder = typeof TextDecoder !== "undefined" ? new TextDecoder("utf-8", { ignoreBOM: true, fatal: true }) : { decode: /* @__PURE__ */ __name(() => {
  throw Error("TextDecoder not available");
}, "decode") };
if (typeof TextDecoder !== "undefined") {
  cachedTextDecoder.decode();
}
let cachedUint8ArrayMemory0 = null;
function getUint8ArrayMemory0() {
  if (cachedUint8ArrayMemory0 === null || cachedUint8ArrayMemory0.byteLength === 0) {
    cachedUint8ArrayMemory0 = new Uint8Array(wasm.memory.buffer);
  }
  return cachedUint8ArrayMemory0;
}
__name(getUint8ArrayMemory0, "getUint8ArrayMemory0");
function getStringFromWasm0(ptr, len) {
  ptr = ptr >>> 0;
  return cachedTextDecoder.decode(getUint8ArrayMemory0().subarray(ptr, ptr + len));
}
__name(getStringFromWasm0, "getStringFromWasm0");
function raycast_splats(origin_x, origin_y, origin_z, dir_x, dir_y, dir_z, near, far, num_splats, packed_splats, raycast_ellipsoid, ln_scale_min, ln_scale_max) {
  const ret = wasm.raycast_splats(origin_x, origin_y, origin_z, dir_x, dir_y, dir_z, near, far, num_splats, packed_splats, raycast_ellipsoid, ln_scale_min, ln_scale_max);
  return ret;
}
__name(raycast_splats, "raycast_splats");
async function __wbg_load(module, imports) {
  if (typeof Response === "function" && module instanceof Response) {
    if (typeof WebAssembly.instantiateStreaming === "function") {
      try {
        return await WebAssembly.instantiateStreaming(module, imports);
      } catch (e) {
        if (module.headers.get("Content-Type") != "application/wasm") {
          console.warn("`WebAssembly.instantiateStreaming` failed because your server does not serve Wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\n", e);
        } else {
          throw e;
        }
      }
    }
    const bytes = await module.arrayBuffer();
    return await WebAssembly.instantiate(bytes, imports);
  } else {
    const instance = await WebAssembly.instantiate(module, imports);
    if (instance instanceof WebAssembly.Instance) {
      return { instance, module };
    } else {
      return instance;
    }
  }
}
__name(__wbg_load, "__wbg_load");
function __wbg_get_imports() {
  const imports = {};
  imports.wbg = {};
  imports.wbg.__wbg_buffer_609cc3eee51ed158 = function(arg0) {
    const ret = arg0.buffer;
    return ret;
  };
  imports.wbg.__wbg_length_3b4f022188ae8db6 = function(arg0) {
    const ret = arg0.length;
    return ret;
  };
  imports.wbg.__wbg_length_6ca527665d89694d = function(arg0) {
    const ret = arg0.length;
    return ret;
  };
  imports.wbg.__wbg_length_8cfd2c6409af88ad = function(arg0) {
    const ret = arg0.length;
    return ret;
  };
  imports.wbg.__wbg_new_9fee97a409b32b68 = function(arg0) {
    const ret = new Uint16Array(arg0);
    return ret;
  };
  imports.wbg.__wbg_new_e3b321dcfef89fc7 = function(arg0) {
    const ret = new Uint32Array(arg0);
    return ret;
  };
  imports.wbg.__wbg_newwithbyteoffsetandlength_e6b7e69acd4c7354 = function(arg0, arg1, arg2) {
    const ret = new Float32Array(arg0, arg1 >>> 0, arg2 >>> 0);
    return ret;
  };
  imports.wbg.__wbg_newwithbyteoffsetandlength_f1dead44d1fc7212 = function(arg0, arg1, arg2) {
    const ret = new Uint32Array(arg0, arg1 >>> 0, arg2 >>> 0);
    return ret;
  };
  imports.wbg.__wbg_newwithlength_5a5efe313cfd59f1 = function(arg0) {
    const ret = new Float32Array(arg0 >>> 0);
    return ret;
  };
  imports.wbg.__wbg_set_10bad9bee0e9c58b = function(arg0, arg1, arg2) {
    arg0.set(arg1, arg2 >>> 0);
  };
  imports.wbg.__wbg_set_d23661d19148b229 = function(arg0, arg1, arg2) {
    arg0.set(arg1, arg2 >>> 0);
  };
  imports.wbg.__wbg_set_f4f1f0daa30696fc = function(arg0, arg1, arg2) {
    arg0.set(arg1, arg2 >>> 0);
  };
  imports.wbg.__wbg_subarray_3aaeec89bb2544f0 = function(arg0, arg1, arg2) {
    const ret = arg0.subarray(arg1 >>> 0, arg2 >>> 0);
    return ret;
  };
  imports.wbg.__wbg_subarray_769e1e0f81bb259b = function(arg0, arg1, arg2) {
    const ret = arg0.subarray(arg1 >>> 0, arg2 >>> 0);
    return ret;
  };
  imports.wbg.__wbindgen_init_externref_table = function() {
    const table = wasm.__wbindgen_export_0;
    const offset = table.grow(4);
    table.set(0, void 0);
    table.set(offset + 0, void 0);
    table.set(offset + 1, null);
    table.set(offset + 2, true);
    table.set(offset + 3, false);
  };
  imports.wbg.__wbindgen_memory = function() {
    const ret = wasm.memory;
    return ret;
  };
  imports.wbg.__wbindgen_throw = function(arg0, arg1) {
    throw new Error(getStringFromWasm0(arg0, arg1));
  };
  return imports;
}
__name(__wbg_get_imports, "__wbg_get_imports");
function __wbg_finalize_init(instance, module) {
  wasm = instance.exports;
  __wbg_init.__wbindgen_wasm_module = module;
  cachedUint8ArrayMemory0 = null;
  wasm.__wbindgen_start();
  return wasm;
}
__name(__wbg_finalize_init, "__wbg_finalize_init");
async function __wbg_init(module_or_path) {
  if (wasm !== void 0) return wasm;
  if (typeof module_or_path !== "undefined") {
    if (Object.getPrototypeOf(module_or_path) === Object.prototype) {
      ({ module_or_path } = module_or_path);
    } else {
      console.warn("using deprecated parameters for the initialization function; pass a single object instead");
    }
  }
  if (typeof module_or_path === "undefined") {
    module_or_path = new URL("data:application/wasm;base64, ", import.meta.url);
  }
  const imports = __wbg_get_imports();
  if (typeof module_or_path === "string" || typeof Request === "function" && module_or_path instanceof Request || typeof URL === "function" && module_or_path instanceof URL) {
    module_or_path = fetch(module_or_path);
  }
  const { instance, module } = await __wbg_load(await module_or_path, imports);
  return __wbg_finalize_init(instance, module);
}
__name(__wbg_init, "__wbg_init");
const LN_SCALE_MIN = -12;
const LN_SCALE_MAX = 9;
const LN_SCALE_ZERO = -30;
const SCALE_ZERO = Math.exp(LN_SCALE_ZERO);
const SPLAT_TEX_WIDTH_BITS = 11;
const SPLAT_TEX_HEIGHT_BITS = 11;
const SPLAT_TEX_WIDTH = 1 << SPLAT_TEX_WIDTH_BITS;
const SPLAT_TEX_HEIGHT = 1 << SPLAT_TEX_HEIGHT_BITS;
const SPLAT_TEX_MIN_HEIGHT = 1;
function isBoolType(type) {
  return type === "bool" || type === "bvec2" || type === "bvec3" || type === "bvec4";
}
__name(isBoolType, "isBoolType");
function isIntType(type) {
  return type === "int" || type === "ivec2" || type === "ivec3" || type === "ivec4";
}
__name(isIntType, "isIntType");
function isUintType(type) {
  return type === "uint" || type === "uvec2" || type === "uvec3" || type === "uvec4";
}
__name(isUintType, "isUintType");
function isFloatType(type) {
  return type === "float" || type === "vec2" || type === "vec3" || type === "vec4";
}
__name(isFloatType, "isFloatType");
function isMatFloatType(type) {
  return type === "mat2" || type === "mat2x2" || type === "mat2x3" || type === "mat2x4" || type === "mat3" || type === "mat3x2" || type === "mat3x3" || type === "mat3x4" || type === "mat4" || type === "mat4x2" || type === "mat4x3" || type === "mat4x4";
}
__name(isMatFloatType, "isMatFloatType");
function isAllFloatType(type) {
  return isFloatType(type) || isMatFloatType(type);
}
__name(isAllFloatType, "isAllFloatType");
function isMat2(type) {
  return type === "mat2" || type === "mat2x2";
}
__name(isMat2, "isMat2");
function isMat3(type) {
  return type === "mat3" || type === "mat3x3";
}
__name(isMat3, "isMat3");
function isMat4(type) {
  return type === "mat4" || type === "mat4x4";
}
__name(isMat4, "isMat4");
function vectorElementType(type) {
  switch (type) {
    case "vec2":
      return "float";
    case "vec3":
      return "float";
    case "vec4":
      return "float";
    case "ivec2":
      return "int";
    case "ivec3":
      return "int";
    case "ivec4":
      return "int";
    case "uvec2":
      return "uint";
    case "uvec3":
      return "uint";
    case "uvec4":
      return "uint";
    default:
      throw new Error(`Invalid vector type: ${type}`);
  }
}
__name(vectorElementType, "vectorElementType");
function vectorDim(type) {
  switch (type) {
    case "vec2":
    case "ivec2":
    case "uvec2":
      return 2;
    case "vec3":
    case "ivec3":
    case "uvec3":
      return 3;
    case "vec4":
    case "ivec4":
    case "uvec4":
      return 4;
    default:
      throw new Error(`Invalid vector type: ${type}`);
  }
}
__name(vectorDim, "vectorDim");
function numberAsInt(value) {
  return Math.trunc(value).toString();
}
__name(numberAsInt, "numberAsInt");
function numberAsUint(value) {
  const v = Math.max(0, Math.trunc(value));
  return `${v.toString()}u`;
}
__name(numberAsUint, "numberAsUint");
function numberAsFloat(value) {
  return value === Number.POSITIVE_INFINITY ? "INFINITY" : value === Number.NEGATIVE_INFINITY ? "-INFINITY" : Number.isInteger(value) ? value.toFixed(1) : value.toString();
}
__name(numberAsFloat, "numberAsFloat");
function valType(val) {
  if (val instanceof DynoValue) {
    return val.type;
  }
  const value = val.dynoOut();
  return value.type;
}
__name(valType, "valType");
class DynoValue {
  static {
    __name(this, "DynoValue");
  }
  constructor(type) {
    this.__isDynoValue = true;
    this.type = type;
  }
}
class DynoOutput extends DynoValue {
  static {
    __name(this, "DynoOutput");
  }
  constructor(dyno2, key) {
    super(dyno2.outTypes[key]);
    this.dyno = dyno2;
    this.key = key;
  }
}
class DynoLiteral extends DynoValue {
  static {
    __name(this, "DynoLiteral");
  }
  constructor(type, literal) {
    super(type);
    this.literal = literal;
  }
  getLiteral() {
    return this.literal;
  }
}
class DynoConst extends DynoLiteral {
  static {
    __name(this, "DynoConst");
  }
  constructor(type, value) {
    super(type, "");
    this.value = value;
  }
  getLiteral() {
    const { type, value } = this;
    switch (type) {
      case "bool":
        return value ? "true" : "false";
      case "uint":
        return numberAsUint(value);
      case "int":
        return numberAsInt(value);
      case "float":
        return numberAsFloat(value);
      case "bvec2": {
        const v = value;
        return `bvec2(${v[0]}, ${v[1]})`;
      }
      case "uvec2": {
        if (value instanceof Vector2) {
          return `uvec2(${numberAsUint(value.x)}, ${numberAsUint(value.y)})`;
        }
        const v = value;
        return `uvec2(${numberAsUint(v[0])}, ${numberAsUint(v[1])})`;
      }
      case "ivec2": {
        if (value instanceof Vector2) {
          return `ivec2(${numberAsInt(value.x)}, ${numberAsInt(value.y)})`;
        }
        const v = value;
        return `ivec2(${numberAsInt(v[0])}, ${numberAsInt(v[1])})`;
      }
      case "vec2": {
        if (value instanceof Vector2) {
          return `vec2(${numberAsFloat(value.x)}, ${numberAsFloat(value.y)})`;
        }
        const v = value;
        return `vec2(${numberAsFloat(v[0])}, ${numberAsFloat(v[1])})`;
      }
      case "bvec3": {
        const v = value;
        return `bvec3(${v[0]}, ${v[1]}, ${v[2]})`;
      }
      case "uvec3": {
        if (value instanceof Vector3) {
          return `uvec3(${numberAsUint(value.x)}, ${numberAsUint(value.y)}, ${numberAsUint(value.z)})`;
        }
        const v = value;
        return `uvec3(${numberAsUint(v[0])}, ${numberAsUint(v[1])}, ${numberAsUint(v[2])})`;
      }
      case "ivec3": {
        if (value instanceof Vector3) {
          return `ivec3(${numberAsInt(value.x)}, ${numberAsInt(value.y)}, ${numberAsInt(value.z)})`;
        }
        const v = value;
        return `ivec3(${numberAsInt(v[0])}, ${numberAsInt(v[1])}, ${numberAsInt(v[2])})`;
      }
      case "vec3": {
        if (value instanceof Vector3) {
          return `vec3(${numberAsFloat(value.x)}, ${numberAsFloat(value.y)}, ${numberAsFloat(value.z)})`;
        }
        const v = value;
        return `vec3(${numberAsFloat(v[0])}, ${numberAsFloat(v[1])}, ${numberAsFloat(v[2])})`;
      }
      case "bvec4": {
        const v = value;
        return `bvec4(${v[0]}, ${v[1]}, ${v[2]}, ${v[3]})`;
      }
      case "uvec4": {
        if (value instanceof Vector4) {
          return `uvec4(${numberAsUint(value.x)}, ${numberAsUint(value.y)}, ${numberAsUint(value.z)}, ${numberAsUint(value.w)})`;
        }
        const v = value;
        return `uvec4(${numberAsUint(v[0])}, ${numberAsUint(v[1])}, ${numberAsUint(v[2])}, ${numberAsUint(v[3])})`;
      }
      case "ivec4": {
        if (value instanceof Vector4) {
          return `ivec4(${numberAsInt(value.x)}, ${numberAsInt(value.y)}, ${numberAsInt(value.z)}, ${numberAsInt(value.w)})`;
        }
        const v = value;
        return `ivec4(${numberAsInt(v[0])}, ${numberAsInt(v[1])}, ${numberAsInt(v[2])}, ${numberAsInt(v[3])})`;
      }
      case "vec4": {
        if (value instanceof Vector4) {
          return `vec4(${numberAsFloat(value.x)}, ${numberAsFloat(value.y)}, ${numberAsFloat(value.z)}, ${numberAsFloat(value.w)})`;
        }
        if (value instanceof Quaternion) {
          return `vec4(${numberAsFloat(value.x)}, ${numberAsFloat(value.y)}, ${numberAsFloat(value.z)}, ${numberAsFloat(value.w)})`;
        }
        const v = value;
        return `vec4(${numberAsFloat(v[0])}, ${numberAsFloat(v[1])}, ${numberAsFloat(v[2])}, ${numberAsFloat(v[3])})`;
      }
      case "mat2":
      case "mat2x2": {
        const m = value;
        const e = m instanceof Matrix2 ? m.elements : value;
        const arg = new Array(4).fill(0).map((_, i) => numberAsFloat(e[i]));
        return `${type}(${arg.join(", ")})`;
      }
      case "mat2x3": {
        const e = value;
        const arg = new Array(6).fill(0).map((_, i) => numberAsFloat(e[i]));
        return `${type}(${arg.join(", ")})`;
      }
      case "mat2x4": {
        const e = value;
        const arg = new Array(8).fill(0).map((_, i) => numberAsFloat(e[i]));
        return `${type}(${arg.join(", ")})`;
      }
      case "mat3":
      case "mat3x3": {
        const m = value;
        const e = m instanceof Matrix3 ? m.elements : value;
        const arg = new Array(9).fill(0).map((_, i) => numberAsFloat(e[i]));
        return `${type}(${arg.join(", ")})`;
      }
      case "mat3x2": {
        const e = value;
        const arg = new Array(6).fill(0).map((_, i) => numberAsFloat(e[i]));
        return `${type}(${arg.join(", ")})`;
      }
      case "mat3x4": {
        const e = value;
        const arg = new Array(12).fill(0).map((_, i) => numberAsFloat(e[i]));
        return `${type}(${arg.join(", ")})`;
      }
      case "mat4":
      case "mat4x4": {
        const m = value;
        const e = m instanceof Matrix4 ? m.elements : value;
        const arg = new Array(16).fill(0).map((_, i) => numberAsFloat(e[i]));
        return `${type}(${arg.join(", ")})`;
      }
      case "mat4x2": {
        const e = value;
        const arg = new Array(8).fill(0).map((_, i) => numberAsFloat(e[i]));
        return `${type}(${arg.join(", ")})`;
      }
      case "mat4x3": {
        const e = value;
        const arg = new Array(12).fill(0).map((_, i) => numberAsFloat(e[i]));
        return `${type}(${arg.join(", ")})`;
      }
      default:
        throw new Error(`Type not implemented: ${String(type)}`);
    }
  }
}
function dynoConst(type, value) {
  return new DynoConst(type, value);
}
__name(dynoConst, "dynoConst");
function literalZero(type) {
  const typeString = String(type);
  if (isBoolType(type)) {
    return `${typeString}(false)`;
  }
  if (isAllFloatType(type)) {
    return `${typeString}(0.0)`;
  }
  if (isIntType(type)) {
    return `${typeString}(0)`;
  }
  if (isUintType(type)) {
    return `${typeString}(0u)`;
  }
  throw new Error(`Type not implemented: ${typeString}`);
}
__name(literalZero, "literalZero");
const DEFAULT_INDENT = "    ";
class Compilation {
  static {
    __name(this, "Compilation");
  }
  constructor({ indent } = {}) {
    this.globals = /* @__PURE__ */ new Set();
    this.statements = [];
    this.uniforms = {};
    this.declares = /* @__PURE__ */ new Set();
    this.updaters = [];
    this.sequence = 0;
    this.indent = DEFAULT_INDENT;
    this.indent = indent ?? DEFAULT_INDENT;
  }
  nextSequence() {
    return this.sequence++;
  }
}
class Dyno {
  static {
    __name(this, "Dyno");
  }
  constructor({
    inTypes,
    outTypes,
    inputs,
    update,
    globals,
    statements,
    generate
  }) {
    this.inTypes = inTypes ?? {};
    this.outTypes = outTypes ?? {};
    this.inputs = inputs ?? {};
    this.update = update;
    this.globals = globals;
    this.statements = statements;
    this.generate = generate ?? (({ inputs: inputs2, outputs, compile }) => {
      var _a2, _b2;
      return {
        globals: (_a2 = this.globals) == null ? void 0 : _a2.call(this, { inputs: inputs2, outputs, compile }),
        statements: (_b2 = this.statements) == null ? void 0 : _b2.call(this, { inputs: inputs2, outputs, compile })
      };
    });
  }
  get outputs() {
    const outputs = {};
    for (const key in this.outTypes) {
      outputs[key] = new DynoOutput(this, key);
    }
    return outputs;
  }
  apply(inputs) {
    Object.assign(this.inputs, inputs);
    return this.outputs;
  }
  compile({
    inputs,
    outputs,
    compile
  }) {
    const result = [
      `// ${this.constructor.name}(${Object.values(inputs).join(", ")}) => (${Object.values(outputs).join(", ")})`
    ];
    const declares = [];
    for (const key in outputs) {
      const name = outputs[key];
      if (name && !compile.declares.has(name)) {
        compile.declares.add(name);
        declares.push(key);
      }
    }
    const { globals, statements, uniforms } = this.generate({
      inputs,
      outputs,
      compile
    });
    for (const global of globals ?? []) {
      compile.globals.add(global);
    }
    for (const key in uniforms) {
      compile.uniforms[key] = uniforms[key];
    }
    if (this.update) {
      compile.updaters.push(this.update);
    }
    for (const key of declares) {
      const name = outputs[key];
      if (name) {
        if (!compile.uniforms[name]) {
          result.push(`${dynoDeclare(name, this.outTypes[key])};`);
        }
      }
    }
    if (statements == null ? void 0 : statements.length) {
      result.push("{");
      result.push(...statements.map((line) => compile.indent + line));
      result.push("}");
    }
    return result;
  }
}
class DynoBlock extends Dyno {
  static {
    __name(this, "DynoBlock");
  }
  constructor({
    inTypes,
    outTypes,
    inputs,
    update,
    globals,
    construct
  }) {
    super({
      inTypes,
      outTypes,
      inputs,
      update,
      globals,
      generate: /* @__PURE__ */ __name((args) => this.generateBlock(args), "generate")
    });
    this.construct = construct;
  }
  generateBlock({
    inputs,
    outputs,
    compile
  }) {
    var _a2, _b2;
    const blockInputs = {};
    const blockOutputs = {};
    for (const key in inputs) {
      if (inputs[key] != null) {
        blockInputs[key] = new DynoLiteral(this.inTypes[key], inputs[key]);
      }
    }
    for (const key in outputs) {
      if (outputs[key] != null) {
        blockOutputs[key] = new DynoValue(this.outTypes[key]);
      }
    }
    const options = { roots: [] };
    const returned = this.construct(blockInputs, blockOutputs, options);
    for (const global of ((_a2 = this.globals) == null ? void 0 : _a2.call(this, { inputs, outputs, compile })) ?? []) {
      compile.globals.add(global);
    }
    const ordering = [];
    const nodeOuts = /* @__PURE__ */ new Map();
    function visit(node, outKey, outName) {
      let outs = nodeOuts.get(node);
      if (!outs) {
        outs = {
          sequence: compile.nextSequence(),
          outNames: /* @__PURE__ */ new Map(),
          newOuts: /* @__PURE__ */ new Set()
        };
        nodeOuts.set(node, outs);
        for (const key in node.inputs) {
          let input = node.inputs[key];
          while (input) {
            if (input instanceof DynoValue) {
              if (input instanceof DynoOutput) {
                visit(input.dyno, input.key);
              }
              break;
            }
            input = input.dynoOut();
          }
        }
        ordering.push(node);
      }
      if (outKey) {
        if (!outName) {
          outs.newOuts.add(outKey);
        }
        outs.outNames.set(outKey, outName ?? `${outKey}_${outs.sequence}`);
      }
    }
    __name(visit, "visit");
    for (const root of options.roots) {
      visit(root);
    }
    for (const key in blockOutputs) {
      let value = (returned == null ? void 0 : returned[key]) ?? blockOutputs[key];
      while (value) {
        if (value instanceof DynoValue) {
          if (value instanceof DynoOutput) {
            visit(value.dyno, value.key, outputs[key]);
          }
          break;
        }
        value = value.dynoOut();
      }
      blockOutputs[key] = value;
    }
    const steps = [];
    for (const dyno2 of ordering) {
      const inputs2 = {};
      const outputs2 = {};
      for (const key in dyno2.inputs) {
        let value = dyno2.inputs[key];
        while (value) {
          if (value instanceof DynoValue) {
            if (value instanceof DynoLiteral) {
              inputs2[key] = value.getLiteral();
            } else if (value instanceof DynoOutput) {
              const source = (_b2 = nodeOuts.get(value.dyno)) == null ? void 0 : _b2.outNames.get(value.key);
              if (!source) {
                throw new Error(
                  `Source not found for ${value.dyno.constructor.name}.${value.key}`
                );
              }
              inputs2[key] = source;
            }
            break;
          }
          value = value.dynoOut();
        }
      }
      const outs = nodeOuts.get(dyno2) ?? { outNames: /* @__PURE__ */ new Map() };
      for (const [key, name] of outs.outNames.entries()) {
        outputs2[key] = name;
      }
      const newSteps = dyno2.compile({ inputs: inputs2, outputs: outputs2, compile });
      steps.push(newSteps);
    }
    const literalOutputs = [];
    for (const key in outputs) {
      if (blockOutputs[key] instanceof DynoLiteral) {
        literalOutputs.push(
          `${outputs[key]} = ${blockOutputs[key].getLiteral()};`
        );
      }
    }
    if (literalOutputs.length > 0) {
      steps.push(literalOutputs);
    }
    const statements = steps.flatMap((step2, index) => {
      return index === 0 ? step2 : ["", ...step2];
    });
    return { statements };
  }
}
function dynoBlock(inTypes, outTypes, construct, { update, globals } = {}) {
  return new DynoBlock({ inTypes, outTypes, construct, update, globals });
}
__name(dynoBlock, "dynoBlock");
function dyno$1({
  inTypes,
  outTypes,
  inputs,
  update,
  globals,
  statements,
  generate
}) {
  return new Dyno({
    inTypes,
    outTypes,
    inputs,
    update,
    globals,
    statements,
    generate
  });
}
__name(dyno$1, "dyno$1");
function dynoDeclare(name, type, count) {
  const typeStr = typeof type === "string" ? type : type.type;
  if (!typeStr) {
    throw new Error(`Invalid DynoType: ${String(type)}`);
  }
  return `${typeStr} ${name}${count != null ? `[${count}]` : ""}`;
}
__name(dynoDeclare, "dynoDeclare");
function unindentLines(s) {
  var _a2;
  let seenNonEmpty = false;
  const lines = s.split("\n").map((line) => {
    const trimmedLine = line.trimEnd();
    if (seenNonEmpty) {
      return trimmedLine;
    }
    if (trimmedLine.length > 0) {
      seenNonEmpty = true;
      return trimmedLine;
    }
    return null;
  }).filter((line) => line != null);
  while (lines.length > 0 && lines[lines.length - 1].length === 0) {
    lines.pop();
  }
  if (lines.length === 0) {
    return [];
  }
  const indent = (_a2 = lines[0].match(/^\s*/)) == null ? void 0 : _a2[0];
  if (!indent) {
    return lines;
  }
  const regex = new RegExp(`^${indent}`);
  return lines.map((line) => line.replace(regex, ""));
}
__name(unindentLines, "unindentLines");
function unindent(s) {
  return unindentLines(s).join("\n");
}
__name(unindent, "unindent");
class UnaryOp extends Dyno {
  static {
    __name(this, "UnaryOp");
  }
  constructor({
    a,
    outKey,
    outTypeFunc
  }) {
    const inTypes = { a: valType(a) };
    const outType = outTypeFunc(valType(a));
    const outTypes = { [outKey]: outType };
    super({ inTypes, outTypes, inputs: { a } });
    this.outKey = outKey;
  }
  dynoOut() {
    return new DynoOutput(this, this.outKey);
  }
}
class BinaryOp extends Dyno {
  static {
    __name(this, "BinaryOp");
  }
  constructor({
    a,
    b,
    outKey,
    outTypeFunc
  }) {
    const inTypes = { a: valType(a), b: valType(b) };
    const outType = outTypeFunc(valType(a), valType(b));
    const outTypes = { [outKey]: outType };
    super({ inTypes, outTypes, inputs: { a, b } });
    this.outKey = outKey;
  }
  dynoOut() {
    return new DynoOutput(this, this.outKey);
  }
}
const Gsplat = { type: "Gsplat" };
const TPackedSplats = { type: "PackedSplats" };
const readPackedSplat = /* @__PURE__ */ __name((packedSplats, index) => new ReadPackedSplat({ packedSplats, index }), "readPackedSplat");
const readPackedSplatRange = /* @__PURE__ */ __name((packedSplats, index, base, count) => new ReadPackedSplatRange({ packedSplats, index, base, count }), "readPackedSplatRange");
const splitGsplat = /* @__PURE__ */ __name((gsplat) => new SplitGsplat({ gsplat }), "splitGsplat");
const combineGsplat = /* @__PURE__ */ __name(({
  gsplat,
  flags,
  index,
  center,
  scales,
  quaternion,
  rgba,
  rgb,
  opacity,
  x,
  y,
  z,
  r,
  g,
  b
}) => {
  return new CombineGsplat({
    gsplat,
    flags,
    index,
    center,
    scales,
    quaternion,
    rgba,
    rgb,
    opacity,
    x,
    y,
    z,
    r,
    g,
    b
  });
}, "combineGsplat");
const transformGsplat = /* @__PURE__ */ __name((gsplat, {
  scale,
  rotate,
  translate,
  recolor
}) => {
  return new TransformGsplat({ gsplat, scale, rotate, translate, recolor });
}, "transformGsplat");
const defineGsplat = unindent(`
  struct Gsplat {
    vec3 center;
    uint flags;
    vec3 scales;
    int index;
    vec4 quaternion;
    vec4 rgba;
  };
  const uint GSPLAT_FLAG_ACTIVE = 1u << 0u;

  bool isGsplatActive(uint flags) {
    return (flags & GSPLAT_FLAG_ACTIVE) != 0u;
  }
`);
const definePackedSplats = unindent(`
  struct PackedSplats {
    usampler2DArray texture;
    int numSplats;
    vec4 rgbMinMaxLnScaleMinMax;
  };
`);
const defineReadPackedSplat = unindent(`
  bool readPackedSplat(usampler2DArray texture, int numSplats, vec4 rgbMinMaxLnScaleMinMax, int index, out Gsplat gsplat) {
    if ((index >= 0) && (index < numSplats)) {
      uvec4 packed = texelFetch(texture, splatTexCoord(index), 0);
      unpackSplatEncoding(packed, gsplat.center, gsplat.scales, gsplat.quaternion, gsplat.rgba, rgbMinMaxLnScaleMinMax);
      return true;
    } else {
      return false;
    }
  }
`);
class ReadPackedSplat extends Dyno {
  static {
    __name(this, "ReadPackedSplat");
  }
  constructor({
    packedSplats,
    index
  }) {
    super({
      inTypes: { packedSplats: TPackedSplats, index: "int" },
      outTypes: { gsplat: Gsplat },
      inputs: { packedSplats, index },
      globals: /* @__PURE__ */ __name(() => [defineGsplat, definePackedSplats, defineReadPackedSplat], "globals"),
      statements: /* @__PURE__ */ __name(({ inputs, outputs }) => {
        const { gsplat } = outputs;
        if (!gsplat) {
          return [];
        }
        const { packedSplats: packedSplats2, index: index2 } = inputs;
        let statements;
        if (packedSplats2 && index2) {
          statements = unindentLines(`
            if (readPackedSplat(${packedSplats2}.texture, ${packedSplats2}.numSplats, ${packedSplats2}.rgbMinMaxLnScaleMinMax, ${index2}, ${gsplat})) {
              bool zeroSize = all(equal(${gsplat}.scales, vec3(0.0, 0.0, 0.0)));
              ${gsplat}.flags = zeroSize ? 0u : GSPLAT_FLAG_ACTIVE;
            } else {
              ${gsplat}.flags = 0u;
            }
          `);
        } else {
          statements = [`${gsplat}.flags = 0u;`];
        }
        statements.push(`${gsplat}.index = ${index2 ?? "0"};`);
        return statements;
      }, "statements")
    });
  }
  dynoOut() {
    return new DynoOutput(this, "gsplat");
  }
}
class ReadPackedSplatRange extends Dyno {
  static {
    __name(this, "ReadPackedSplatRange");
  }
  constructor({
    packedSplats,
    index,
    base,
    count
  }) {
    super({
      inTypes: {
        packedSplats: TPackedSplats,
        index: "int",
        base: "int",
        count: "int"
      },
      outTypes: { gsplat: Gsplat },
      inputs: { packedSplats, index, base, count },
      globals: /* @__PURE__ */ __name(() => [defineGsplat, definePackedSplats, defineReadPackedSplat], "globals"),
      statements: /* @__PURE__ */ __name(({ inputs, outputs }) => {
        const { gsplat } = outputs;
        if (!gsplat) {
          return [];
        }
        const { packedSplats: packedSplats2, index: index2, base: base2, count: count2 } = inputs;
        let statements;
        if (packedSplats2 && index2 && base2 && count2) {
          statements = unindentLines(`
            ${gsplat}.flags = 0u;
            if ((${index2} >= ${base2}) && (${index2} < (${base2} + ${count2}))) {
              if (readPackedSplat(${packedSplats2}.texture, ${packedSplats2}.numSplats, ${packedSplats2}.rgbMinMaxLnScaleMinMax, ${index2}, ${gsplat})) {
                bool zeroSize = all(equal(${gsplat}.scales, vec3(0.0, 0.0, 0.0)));
                ${gsplat}.flags = zeroSize ? 0u : GSPLAT_FLAG_ACTIVE;
              }
            }
          `);
        } else {
          statements = [`${gsplat}.flags = 0u;`];
        }
        statements.push(`${gsplat}.index = ${index2 ?? "0"};`);
        return statements;
      }, "statements")
    });
  }
  dynoOut() {
    return new DynoOutput(this, "gsplat");
  }
}
class SplitGsplat extends Dyno {
  static {
    __name(this, "SplitGsplat");
  }
  constructor({ gsplat }) {
    super({
      inTypes: { gsplat: Gsplat },
      outTypes: {
        flags: "uint",
        active: "bool",
        index: "int",
        center: "vec3",
        scales: "vec3",
        quaternion: "vec4",
        rgba: "vec4",
        rgb: "vec3",
        opacity: "float",
        x: "float",
        y: "float",
        z: "float",
        r: "float",
        g: "float",
        b: "float"
      },
      inputs: { gsplat },
      globals: /* @__PURE__ */ __name(() => [defineGsplat], "globals"),
      statements: /* @__PURE__ */ __name(({ inputs, outputs }) => {
        const { gsplat: gsplat2 } = inputs;
        const {
          flags,
          active,
          index,
          center,
          scales,
          quaternion,
          rgba,
          rgb,
          opacity,
          x,
          y,
          z,
          r,
          g,
          b
        } = outputs;
        return [
          !flags ? null : `${flags} = ${gsplat2 ? `${gsplat2}.flags` : "0u"};`,
          !active ? null : `${active} = isGsplatActive(${gsplat2 ? `${gsplat2}.flags` : "0u"});`,
          !index ? null : `${index} = ${gsplat2 ? `${gsplat2}.index` : "0"};`,
          !center ? null : `${center} = ${gsplat2 ? `${gsplat2}.center` : "vec3(0.0, 0.0, 0.0)"};`,
          !scales ? null : `${scales} = ${gsplat2 ? `${gsplat2}.scales` : "vec3(0.0, 0.0, 0.0)"};`,
          !quaternion ? null : `${quaternion} = ${gsplat2 ? `${gsplat2}.quaternion` : "vec4(0.0, 0.0, 0.0, 1.0)"};`,
          !rgba ? null : `${rgba} = ${gsplat2 ? `${gsplat2}.rgba` : "vec4(0.0, 0.0, 0.0, 0.0)"};`,
          !rgb ? null : `${rgb} = ${gsplat2 ? `${gsplat2}.rgba.rgb` : "vec3(0.0, 0.0, 0.0)"};`,
          !opacity ? null : `${opacity} = ${gsplat2 ? `${gsplat2}.rgba.a` : "0.0"};`,
          !x ? null : `${x} = ${gsplat2 ? `${gsplat2}.center.x` : "0.0"};`,
          !y ? null : `${y} = ${gsplat2 ? `${gsplat2}.center.y` : "0.0"};`,
          !z ? null : `${z} = ${gsplat2 ? `${gsplat2}.center.z` : "0.0"};`,
          !r ? null : `${r} = ${gsplat2 ? `${gsplat2}.rgba.r` : "0.0"};`,
          !g ? null : `${g} = ${gsplat2 ? `${gsplat2}.rgba.g` : "0.0"};`,
          !b ? null : `${b} = ${gsplat2 ? `${gsplat2}.rgba.b` : "0.0"};`
        ].filter(Boolean);
      }, "statements")
    });
  }
}
class CombineGsplat extends Dyno {
  static {
    __name(this, "CombineGsplat");
  }
  constructor({
    gsplat,
    flags,
    index,
    center,
    scales,
    quaternion,
    rgba,
    rgb,
    opacity,
    x,
    y,
    z,
    r,
    g,
    b
  }) {
    super({
      inTypes: {
        gsplat: Gsplat,
        flags: "uint",
        index: "int",
        center: "vec3",
        scales: "vec3",
        quaternion: "vec4",
        rgba: "vec4",
        rgb: "vec3",
        opacity: "float",
        x: "float",
        y: "float",
        z: "float",
        r: "float",
        g: "float",
        b: "float"
      },
      outTypes: { gsplat: Gsplat },
      inputs: {
        gsplat,
        flags,
        index,
        center,
        scales,
        quaternion,
        rgba,
        rgb,
        opacity,
        x,
        y,
        z,
        r,
        g,
        b
      },
      globals: /* @__PURE__ */ __name(() => [defineGsplat], "globals"),
      statements: /* @__PURE__ */ __name(({ inputs, outputs }) => {
        const { gsplat: outGsplat } = outputs;
        if (!outGsplat) {
          return [];
        }
        const {
          gsplat: gsplat2,
          flags: flags2,
          index: index2,
          center: center2,
          scales: scales2,
          quaternion: quaternion2,
          rgba: rgba2,
          rgb: rgb2,
          opacity: opacity2,
          x: x2,
          y: y2,
          z: z2,
          r: r2,
          g: g2,
          b: b22
        } = inputs;
        return [
          `${outGsplat}.flags = ${flags2 ?? (gsplat2 ? `${gsplat2}.flags` : "0u")};`,
          `${outGsplat}.index = ${index2 ?? (gsplat2 ? `${gsplat2}.index` : "0")};`,
          `${outGsplat}.center = ${center2 ?? (gsplat2 ? `${gsplat2}.center` : "vec3(0.0, 0.0, 0.0)")};`,
          `${outGsplat}.scales = ${scales2 ?? (gsplat2 ? `${gsplat2}.scales` : "vec3(0.0, 0.0, 0.0)")};`,
          `${outGsplat}.quaternion = ${quaternion2 ?? (gsplat2 ? `${gsplat2}.quaternion` : "vec4(0.0, 0.0, 0.0, 1.0)")};`,
          `${outGsplat}.rgba = ${rgba2 ?? (gsplat2 ? `${gsplat2}.rgba` : "vec4(0.0, 0.0, 0.0, 0.0)")};`,
          !rgb2 ? null : `${outGsplat}.rgba.rgb = ${rgb2};`,
          !opacity2 ? null : `${outGsplat}.rgba.a = ${opacity2};`,
          !x2 ? null : `${outGsplat}.center.x = ${x2};`,
          !y2 ? null : `${outGsplat}.center.y = ${y2};`,
          !z2 ? null : `${outGsplat}.center.z = ${z2};`,
          !r2 ? null : `${outGsplat}.rgba.r = ${r2};`,
          !g2 ? null : `${outGsplat}.rgba.g = ${g2};`,
          !b22 ? null : `${outGsplat}.rgba.b = ${b22};`
        ].filter(Boolean);
      }, "statements")
    });
  }
  dynoOut() {
    return new DynoOutput(this, "gsplat");
  }
}
unindent(`
  vec3 gsplatNormal(vec3 scales, vec4 quaternion) {
    float minScale = min(scales.x, min(scales.y, scales.z));
    vec3 normal;
    if (scales.z == minScale) {
      normal = vec3(0.0, 0.0, 1.0);
    } else if (scales.y == minScale) {
      normal = vec3(0.0, 1.0, 0.0);
    } else {
      normal = vec3(1.0, 0.0, 0.0);
    }
    return quatVec(quaternion, normal);
  }
`);
class TransformGsplat extends Dyno {
  static {
    __name(this, "TransformGsplat");
  }
  constructor({
    gsplat,
    scale,
    rotate,
    translate,
    recolor
  }) {
    super({
      inTypes: {
        gsplat: Gsplat,
        scale: "float",
        rotate: "vec4",
        translate: "vec3",
        recolor: "vec4"
      },
      outTypes: { gsplat: Gsplat },
      inputs: { gsplat, scale, rotate, translate, recolor },
      globals: /* @__PURE__ */ __name(() => [defineGsplat], "globals"),
      statements: /* @__PURE__ */ __name(({ inputs, outputs, compile }) => {
        const { gsplat: gsplat2 } = outputs;
        if (!gsplat2 || !inputs.gsplat) {
          return [];
        }
        const { scale: scale2, rotate: rotate2, translate: translate2, recolor: recolor2 } = inputs;
        const indent = compile.indent;
        const statements = [
          `${gsplat2} = ${inputs.gsplat};`,
          `if (isGsplatActive(${gsplat2}.flags)) {`,
          scale2 ? `${indent}${gsplat2}.center *= ${scale2};` : null,
          rotate2 ? `${indent}${gsplat2}.center = quatVec(${rotate2}, ${gsplat2}.center);` : null,
          translate2 ? `${indent}${gsplat2}.center += ${translate2};` : null,
          scale2 ? `${indent}${gsplat2}.scales *= ${scale2};` : null,
          rotate2 ? `${indent}${gsplat2}.quaternion = quatQuat(${rotate2}, ${gsplat2}.quaternion);` : null,
          recolor2 ? `${indent}${gsplat2}.rgba *= ${recolor2};` : null,
          "}"
        ].filter(Boolean);
        return statements;
      }, "statements")
    });
  }
  dynoOut() {
    return new DynoOutput(this, "gsplat");
  }
}
const outputPackedSplat = /* @__PURE__ */ __name((gsplat, rgbMinMaxLnScaleMinMax) => new OutputPackedSplat({ gsplat, rgbMinMaxLnScaleMinMax }), "outputPackedSplat");
class OutputPackedSplat extends Dyno {
  static {
    __name(this, "OutputPackedSplat");
  }
  constructor({
    gsplat,
    rgbMinMaxLnScaleMinMax
  }) {
    super({
      inTypes: { gsplat: Gsplat, rgbMinMaxLnScaleMinMax: "vec4" },
      inputs: { gsplat, rgbMinMaxLnScaleMinMax },
      globals: /* @__PURE__ */ __name(() => [defineGsplat], "globals"),
      statements: /* @__PURE__ */ __name(({ inputs, outputs }) => {
        const { output } = outputs;
        if (!output) {
          return [];
        }
        const { gsplat: gsplat2, rgbMinMaxLnScaleMinMax: rgbMinMaxLnScaleMinMax2 } = inputs;
        if (gsplat2) {
          return unindentLines(`
            if (isGsplatActive(${gsplat2}.flags)) {
              ${output} = packSplatEncoding(${gsplat2}.center, ${gsplat2}.scales, ${gsplat2}.quaternion, ${gsplat2}.rgba, ${rgbMinMaxLnScaleMinMax2});
            } else {
              ${output} = uvec4(0u, 0u, 0u, 0u);
            }
          `);
        }
        return [`${output} = uvec4(0u, 0u, 0u, 0u);`];
      }, "statements")
    });
  }
  dynoOut() {
    return new DynoOutput(this, "output");
  }
}
class OutputRgba8 extends Dyno {
  static {
    __name(this, "OutputRgba8");
  }
  constructor({ rgba8 }) {
    super({
      inTypes: { rgba8: "vec4" },
      inputs: { rgba8 },
      statements: /* @__PURE__ */ __name(({ inputs, outputs }) => [
        `target = ${inputs.rgba8 ?? "vec4(0.0, 0.0, 0.0, 0.0)"};`
      ], "statements")
    });
  }
  dynoOut() {
    return new DynoOutput(this, "rgba8");
  }
}
class DynoUniform extends Dyno {
  static {
    __name(this, "DynoUniform");
  }
  constructor({
    key,
    type,
    count,
    value,
    update,
    globals
  }) {
    key = key ?? "value";
    super({
      outTypes: { [key]: type },
      update: /* @__PURE__ */ __name(() => {
        if (update) {
          const value2 = update(this.value);
          if (value2 !== void 0) {
            this.value = value2;
          }
        }
        this.uniform.value = this.value;
      }, "update"),
      generate: /* @__PURE__ */ __name(({ inputs, outputs }) => {
        const allGlobals = (globals == null ? void 0 : globals({ inputs, outputs })) ?? [];
        const uniforms = {};
        const name = outputs[key];
        if (name) {
          allGlobals.push(`uniform ${dynoDeclare(name, type, count)};`);
          uniforms[name] = this.uniform;
        }
        return { globals: allGlobals, uniforms };
      }, "generate")
    });
    this.type = type;
    this.count = count;
    this.value = value;
    this.uniform = { value };
    this.outKey = key;
  }
  dynoOut() {
    return new DynoOutput(this, this.outKey);
  }
}
class DynoBool extends DynoUniform {
  static {
    __name(this, "DynoBool");
  }
  constructor({
    key,
    value,
    update
  }) {
    super({ key, type: "bool", value, update });
  }
}
class DynoInt extends DynoUniform {
  static {
    __name(this, "DynoInt");
  }
  constructor({
    key,
    value,
    update
  }) {
    super({ key, type: "int", value, update });
  }
}
class DynoFloat extends DynoUniform {
  static {
    __name(this, "DynoFloat");
  }
  constructor({
    key,
    value,
    update
  }) {
    super({ key, type: "float", value, update });
  }
}
class DynoVec2 extends DynoUniform {
  static {
    __name(this, "DynoVec2");
  }
  constructor({
    key,
    value,
    update
  }) {
    super({ key, type: "vec2", value, update });
  }
}
class DynoVec3 extends DynoUniform {
  static {
    __name(this, "DynoVec3");
  }
  constructor({
    key,
    value,
    update
  }) {
    super({ key, type: "vec3", value, update });
  }
}
class DynoVec4 extends DynoUniform {
  static {
    __name(this, "DynoVec4");
  }
  constructor({
    key,
    value,
    update
  }) {
    super({ key, type: "vec4", value, update });
  }
}
class DynoUsampler2DArray extends DynoUniform {
  static {
    __name(this, "DynoUsampler2DArray");
  }
  constructor({
    key,
    value,
    update
  }) {
    super({ key, type: "usampler2DArray", value, update });
  }
}
const f32buffer = new Float32Array(1);
const u32buffer = new Uint32Array(f32buffer.buffer);
const supportsFloat16Array = "Float16Array" in globalThis;
const f16buffer = supportsFloat16Array ? new globalThis["Float16Array"](1) : null;
const u16buffer = new Uint16Array(f16buffer == null ? void 0 : f16buffer.buffer);
const toHalf = supportsFloat16Array ? toHalfNative : toHalfJS;
const fromHalf = supportsFloat16Array ? fromHalfNative : fromHalfJS;
function toHalfNative(f) {
  f16buffer[0] = f;
  return u16buffer[0];
}
__name(toHalfNative, "toHalfNative");
function toHalfJS(f) {
  f32buffer[0] = f;
  const bits2 = u32buffer[0];
  const sign2 = bits2 >> 31 & 1;
  const exp3 = bits2 >> 23 & 255;
  const frac = bits2 & 8388607;
  const halfSign = sign2 << 15;
  if (exp3 === 255) {
    if (frac !== 0) {
      return halfSign | 32767;
    }
    return halfSign | 31744;
  }
  const newExp = exp3 - 127 + 15;
  if (newExp >= 31) {
    return halfSign | 31744;
  }
  if (newExp <= 0) {
    if (newExp < -10) {
      return halfSign;
    }
    const subFrac = (frac | 8388608) >> 1 - newExp + 13;
    return halfSign | subFrac;
  }
  const halfFrac = frac >> 13;
  return halfSign | newExp << 10 | halfFrac;
}
__name(toHalfJS, "toHalfJS");
function fromHalfNative(u) {
  u16buffer[0] = u;
  return f16buffer[0];
}
__name(fromHalfNative, "fromHalfNative");
function fromHalfJS(h) {
  const sign2 = h >> 15 & 1;
  const exp3 = h >> 10 & 31;
  const frac = h & 1023;
  let f32bits;
  if (exp3 === 0) {
    if (frac === 0) {
      f32bits = sign2 << 31;
    } else {
      let mant = frac;
      let e = -14;
      while ((mant & 1024) === 0) {
        mant <<= 1;
        e--;
      }
      mant &= 1023;
      const newExp = e + 127;
      const newFrac = mant << 13;
      f32bits = sign2 << 31 | newExp << 23 | newFrac;
    }
  } else if (exp3 === 31) {
    if (frac === 0) {
      f32bits = sign2 << 31 | 2139095040;
    } else {
      f32bits = sign2 << 31 | 2143289344;
    }
  } else {
    const newExp = exp3 - 15 + 127;
    const newFrac = frac << 13;
    f32bits = sign2 << 31 | newExp << 23 | newFrac;
  }
  u32buffer[0] = f32bits;
  return f32buffer[0];
}
__name(fromHalfJS, "fromHalfJS");
function floatToUint8(v) {
  return Math.max(0, Math.min(255, Math.round(v * 255)));
}
__name(floatToUint8, "floatToUint8");
function getArrayBuffers(ctx) {
  const buffers = [];
  const seen = /* @__PURE__ */ new Set();
  function traverse(obj) {
    if (obj && typeof obj === "object" && !seen.has(obj)) {
      seen.add(obj);
      if (obj instanceof ArrayBuffer) {
        buffers.push(obj);
      } else if (ArrayBuffer.isView(obj)) {
        buffers.push(obj.buffer);
      } else if (Array.isArray(obj)) {
        obj.forEach(traverse);
      } else {
        Object.values(obj).forEach(traverse);
      }
    }
  }
  __name(traverse, "traverse");
  traverse(ctx);
  return buffers;
}
__name(getArrayBuffers, "getArrayBuffers");
class FreeList {
  static {
    __name(this, "FreeList");
  }
  constructor({
    // Allocate a new item with the given args
    allocate,
    // Dispose of an item (optional, if GC is enough)
    dispose,
    // Check if an existing item in the list is valid for the given args,
    // allowing you to store heterogeneous items in the list.
    valid
  }) {
    this.items = [];
    this.allocate = allocate;
    this.dispose = dispose;
    this.valid = valid;
  }
  // Allocate a new item from the free list, first checking if a existing item
  // on the freelist is valid for the given args.
  alloc(args) {
    while (true) {
      const item = this.items.pop();
      if (!item) {
        break;
      }
      if (this.valid(item, args)) {
        return item;
      }
      if (this.dispose) {
        this.dispose(item);
      }
    }
    return this.allocate(args);
  }
  free(item) {
    this.items.push(item);
  }
  disposeAll() {
    let item;
    item = this.items.pop();
    while (item) {
      if (this.dispose) {
        this.dispose(item);
      }
      item = this.items.pop();
    }
  }
}
function setPackedSplat(packedSplats, index, x, y, z, scaleX, scaleY, scaleZ, quatX, quatY, quatZ, quatW, opacity, r, g, b, encoding) {
  const rgbMin = (encoding == null ? void 0 : encoding.rgbMin) ?? 0;
  const rgbMax = (encoding == null ? void 0 : encoding.rgbMax) ?? 1;
  const rgbRange = rgbMax - rgbMin;
  const uR = floatToUint8((r - rgbMin) / rgbRange);
  const uG = floatToUint8((g - rgbMin) / rgbRange);
  const uB = floatToUint8((b - rgbMin) / rgbRange);
  const uA = floatToUint8(opacity);
  const uQuat = encodeQuatOctXy88R8(
    tempQuaternion.set(quatX, quatY, quatZ, quatW)
  );
  const uQuatX = uQuat & 255;
  const uQuatY = uQuat >>> 8 & 255;
  const uQuatZ = uQuat >>> 16 & 255;
  const lnScaleMin = (encoding == null ? void 0 : encoding.lnScaleMin) ?? LN_SCALE_MIN;
  const lnScaleMax = (encoding == null ? void 0 : encoding.lnScaleMax) ?? LN_SCALE_MAX;
  const lnScaleScale = 254 / (lnScaleMax - lnScaleMin);
  const uScaleX = scaleX < SCALE_ZERO ? 0 : Math.min(
    255,
    Math.max(
      1,
      Math.round((Math.log(scaleX) - lnScaleMin) * lnScaleScale) + 1
    )
  );
  const uScaleY = scaleY < SCALE_ZERO ? 0 : Math.min(
    255,
    Math.max(
      1,
      Math.round((Math.log(scaleY) - lnScaleMin) * lnScaleScale) + 1
    )
  );
  const uScaleZ = scaleZ < SCALE_ZERO ? 0 : Math.min(
    255,
    Math.max(
      1,
      Math.round((Math.log(scaleZ) - lnScaleMin) * lnScaleScale) + 1
    )
  );
  const uCenterX = toHalf(x);
  const uCenterY = toHalf(y);
  const uCenterZ = toHalf(z);
  const i4 = index * 4;
  packedSplats[i4] = uR | uG << 8 | uB << 16 | uA << 24;
  packedSplats[i4 + 1] = uCenterX | uCenterY << 16;
  packedSplats[i4 + 2] = uCenterZ | uQuatX << 16 | uQuatY << 24;
  packedSplats[i4 + 3] = uScaleX | uScaleY << 8 | uScaleZ << 16 | uQuatZ << 24;
}
__name(setPackedSplat, "setPackedSplat");
const tempQuaternion = new Quaternion();
const packedCenter = new Vector3();
const packedScales = new Vector3();
const packedQuaternion = new Quaternion();
const packedColor = new Color();
const packedFields = {
  center: packedCenter,
  scales: packedScales,
  quaternion: packedQuaternion,
  color: packedColor,
  opacity: 0
};
function unpackSplat(packedSplats, index, encoding) {
  const result = packedFields;
  const i4 = index * 4;
  const word0 = packedSplats[i4];
  const word1 = packedSplats[i4 + 1];
  const word2 = packedSplats[i4 + 2];
  const word3 = packedSplats[i4 + 3];
  const rgbMin = (encoding == null ? void 0 : encoding.rgbMin) ?? 0;
  const rgbMax = (encoding == null ? void 0 : encoding.rgbMax) ?? 1;
  const rgbRange = rgbMax - rgbMin;
  result.color.set(
    rgbMin + (word0 & 255) / 255 * rgbRange,
    rgbMin + (word0 >>> 8 & 255) / 255 * rgbRange,
    rgbMin + (word0 >>> 16 & 255) / 255 * rgbRange
  );
  result.opacity = (word0 >>> 24 & 255) / 255;
  result.center.set(
    fromHalf(word1 & 65535),
    fromHalf(word1 >>> 16 & 65535),
    fromHalf(word2 & 65535)
  );
  const lnScaleMin = (encoding == null ? void 0 : encoding.lnScaleMin) ?? LN_SCALE_MIN;
  const lnScaleMax = (encoding == null ? void 0 : encoding.lnScaleMax) ?? LN_SCALE_MAX;
  const lnScaleScale = (lnScaleMax - lnScaleMin) / 254;
  const uScalesX = word3 & 255;
  result.scales.x = uScalesX === 0 ? 0 : Math.exp(lnScaleMin + (uScalesX - 1) * lnScaleScale);
  const uScalesY = word3 >>> 8 & 255;
  result.scales.y = uScalesY === 0 ? 0 : Math.exp(lnScaleMin + (uScalesY - 1) * lnScaleScale);
  const uScalesZ = word3 >>> 16 & 255;
  result.scales.z = uScalesZ === 0 ? 0 : Math.exp(lnScaleMin + (uScalesZ - 1) * lnScaleScale);
  const uQuat = word2 >>> 16 & 65535 | word3 >>> 8 & 16711680;
  decodeQuatOctXy88R8(uQuat, result.quaternion);
  return result;
}
__name(unpackSplat, "unpackSplat");
function getTextureSize(numSplats) {
  const width = SPLAT_TEX_WIDTH;
  const height = Math.max(
    SPLAT_TEX_MIN_HEIGHT,
    Math.min(SPLAT_TEX_HEIGHT, Math.ceil(numSplats / width))
  );
  const depth = Math.ceil(numSplats / (width * height));
  const maxSplats = width * height * depth;
  return { width, height, depth, maxSplats };
}
__name(getTextureSize, "getTextureSize");
function cloneClock(clock) {
  const newClock = new Clock(clock.autoStart);
  newClock.startTime = clock.startTime;
  newClock.oldTime = clock.oldTime;
  newClock.elapsedTime = clock.elapsedTime;
  newClock.running = clock.running;
  return newClock;
}
__name(cloneClock, "cloneClock");
const IDENT_VERTEX_SHADER = unindent(`
  precision highp float;

  in vec3 position;

  void main() {
    gl_Position = vec4(position.xy, 0.0, 1.0);
  }
`);
function averagePositions(positions) {
  const sum = new Vector3();
  for (const position of positions) {
    sum.add(position);
  }
  return sum.divideScalar(positions.length);
}
__name(averagePositions, "averagePositions");
function averageQuaternions(quaternions) {
  if (quaternions.length === 0) {
    return new Quaternion();
  }
  const sum = quaternions[0].clone();
  for (let i = 1; i < quaternions.length; i++) {
    if (quaternions[i].dot(quaternions[0]) < 0) {
      sum.x -= quaternions[i].x;
      sum.y -= quaternions[i].y;
      sum.z -= quaternions[i].z;
      sum.w -= quaternions[i].w;
    } else {
      sum.x += quaternions[i].x;
      sum.y += quaternions[i].y;
      sum.z += quaternions[i].z;
      sum.w += quaternions[i].w;
    }
  }
  return sum.normalize();
}
__name(averageQuaternions, "averageQuaternions");
function coorientDist(matrix1, matrix2) {
  const [origin1, rotate1] = [new Vector3(), new Quaternion()];
  const [origin2, rotate2] = [new Vector3(), new Quaternion()];
  matrix1.decompose(origin1, rotate1, new Vector3());
  matrix2.decompose(origin2, rotate2, new Vector3());
  const distance2 = origin1.distanceTo(origin2);
  const coorient = Math.abs(rotate1.dot(rotate2));
  return { distance: distance2, coorient };
}
__name(coorientDist, "coorientDist");
function withinCoorientDist({
  matrix1,
  matrix2,
  maxDistance,
  minCoorient
}) {
  const { distance: distance2, coorient } = coorientDist(matrix1, matrix2);
  return distance2 <= maxDistance && (minCoorient == null || coorient >= minCoorient);
}
__name(withinCoorientDist, "withinCoorientDist");
const tempNormalizedQuaternion = new Quaternion();
const tempAxis = new Vector3();
function encodeQuatOctXy88R8(q) {
  const qnorm = tempNormalizedQuaternion.copy(q).normalize();
  if (qnorm.w < 0) {
    qnorm.set(-qnorm.x, -qnorm.y, -qnorm.z, -qnorm.w);
  }
  const theta = 2 * Math.acos(qnorm.w);
  const xyz_norm = Math.sqrt(
    qnorm.x * qnorm.x + qnorm.y * qnorm.y + qnorm.z * qnorm.z
  );
  const axis = xyz_norm < 1e-6 ? tempAxis.set(1, 0, 0) : tempAxis.set(qnorm.x, qnorm.y, qnorm.z).divideScalar(xyz_norm);
  const sum = Math.abs(axis.x) + Math.abs(axis.y) + Math.abs(axis.z);
  let p_x = axis.x / sum;
  let p_y = axis.y / sum;
  if (axis.z < 0) {
    const tmp = p_x;
    p_x = (1 - Math.abs(p_y)) * (p_x >= 0 ? 1 : -1);
    p_y = (1 - Math.abs(tmp)) * (p_y >= 0 ? 1 : -1);
  }
  const u_f = p_x * 0.5 + 0.5;
  const v_f = p_y * 0.5 + 0.5;
  const quantU = Math.round(u_f * 255);
  const quantV = Math.round(v_f * 255);
  const angleInt = Math.round(theta * (255 / Math.PI));
  return angleInt << 16 | quantV << 8 | quantU;
}
__name(encodeQuatOctXy88R8, "encodeQuatOctXy88R8");
function decodeQuatOctXy88R8(encoded, out) {
  const quantU = encoded & 255;
  const quantV = encoded >>> 8 & 255;
  const angleInt = encoded >>> 16 & 255;
  const u_f = quantU / 255;
  const v_f = quantV / 255;
  let f_x = (u_f - 0.5) * 2;
  let f_y = (v_f - 0.5) * 2;
  const f_z = 1 - (Math.abs(f_x) + Math.abs(f_y));
  const t = Math.max(-f_z, 0);
  f_x += f_x >= 0 ? -t : t;
  f_y += f_y >= 0 ? -t : t;
  const axis = tempAxis.set(f_x, f_y, f_z).normalize();
  const theta = angleInt / 255 * Math.PI;
  const halfTheta = theta * 0.5;
  const s = Math.sin(halfTheta);
  const w = Math.cos(halfTheta);
  out.set(axis.x * s, axis.y * s, axis.z * s, w);
  return out;
}
__name(decodeQuatOctXy88R8, "decodeQuatOctXy88R8");
function decompressPartialGzip(fileBytes, numBytes) {
  const chunks = [];
  let totalBytes = 0;
  let result = null;
  const gunzip = new Gunzip((data, final) => {
    chunks.push(data);
    totalBytes += data.length;
    if (final || totalBytes >= numBytes) {
      const allBytes = new Uint8Array(totalBytes);
      let offset2 = 0;
      for (const chunk of chunks) {
        allBytes.set(chunk, offset2);
        offset2 += chunk.length;
      }
      result = allBytes.slice(0, numBytes);
    }
  });
  const CHUNK_SIZE = 1024;
  let offset = 0;
  while (result == null && offset < fileBytes.length) {
    const chunk = fileBytes.slice(offset, offset + CHUNK_SIZE);
    gunzip.push(chunk, false);
    offset += CHUNK_SIZE;
  }
  if (result == null) {
    gunzip.push(new Uint8Array(), true);
    if (result == null) {
      throw new Error("Failed to decompress partial gzip");
    }
  }
  return result;
}
__name(decompressPartialGzip, "decompressPartialGzip");
class DynoProgram {
  static {
    __name(this, "DynoProgram");
  }
  constructor({
    graph,
    inputs,
    outputs,
    template
  }) {
    this.graph = graph;
    this.template = template;
    this.inputs = inputs ?? {};
    this.outputs = outputs ?? {};
    const compile = new Compilation({ indent: this.template.indent });
    for (const key in this.outputs) {
      if (this.outputs[key]) {
        compile.declares.add(this.outputs[key]);
      }
    }
    const statements = graph.compile({
      inputs: this.inputs,
      outputs: this.outputs,
      compile
    });
    this.shader = template.generate({ globals: compile.globals, statements });
    this.uniforms = compile.uniforms;
    this.updaters = compile.updaters;
  }
  prepareMaterial() {
    return getMaterial(this);
  }
  update() {
    for (const updater of this.updaters) {
      updater();
    }
  }
}
class DynoProgramTemplate {
  static {
    __name(this, "DynoProgramTemplate");
  }
  constructor(template) {
    const globals = template.match(/^([ \t]*)\{\{\s*GLOBALS\s*\}\}/m);
    const statements = template.match(/^([ \t]*)\{\{\s*STATEMENTS\s*\}\}/m);
    if (!globals || !statements) {
      throw new Error(
        "Template must contain {{ GLOBALS }} and {{ STATEMENTS }}"
      );
    }
    this.before = template.substring(0, globals.index);
    this.between = template.substring(
      globals.index + globals[0].length,
      statements.index
    );
    this.after = template.substring(
      statements.index + statements[0].length
    );
    this.indent = statements[1];
  }
  generate({
    globals,
    statements
  }) {
    return this.before + Array.from(globals).join("\n\n") + this.between + statements.map((s) => this.indent + s).join("\n") + this.after;
  }
}
const programMaterial = /* @__PURE__ */ new Map();
function getMaterial(program) {
  let material = programMaterial.get(program);
  if (material) {
    return material;
  }
  material = new RawShaderMaterial({
    glslVersion: GLSL3,
    vertexShader: IDENT_VERTEX_SHADER,
    fragmentShader: program.shader,
    uniforms: program.uniforms
  });
  programMaterial.set(program, material);
  return material;
}
__name(getMaterial, "getMaterial");
function addOutputType(a, b, operation = "add") {
  const error = /* @__PURE__ */ __name(() => {
    throw new Error(`Invalid ${operation} types: ${a}, ${b}`);
  }, "error");
  if (a === b) return a;
  if (a === "int") {
    if (isIntType(b)) return b;
    error();
  }
  if (b === "int") {
    if (isIntType(a)) return a;
    error();
  }
  if (a === "uint") {
    if (isUintType(b)) return b;
    error();
  }
  if (b === "uint") {
    if (isUintType(a)) return a;
    error();
  }
  if (a === "float") {
    if (isAllFloatType(b)) return b;
    error();
  }
  if (b === "float") {
    if (isAllFloatType(a)) return a;
    error();
  }
  throw new Error(`Invalid ${operation} types: ${a}, ${b}`);
}
__name(addOutputType, "addOutputType");
function subOutputType(a, b) {
  return addOutputType(a, b, "sub");
}
__name(subOutputType, "subOutputType");
function mulOutputType(a, b) {
  const error = /* @__PURE__ */ __name(() => {
    throw new Error(`Invalid mul types: ${a}, ${b}`);
  }, "error");
  const result = /* @__PURE__ */ __name((value) => value, "result");
  if (a === "int") {
    if (isIntType(b)) return result(b);
    error();
  }
  if (b === "int") {
    if (isIntType(a)) return result(a);
    error();
  }
  if (a === "uint") {
    if (isUintType(b)) return result(b);
    error();
  }
  if (b === "uint") {
    if (isUintType(a)) return result(a);
    error();
  }
  if (a === "float") {
    if (isAllFloatType(b)) return result(b);
    error();
  }
  if (b === "float") {
    if (isAllFloatType(a)) return result(a);
    error();
  }
  if (isIntType(a) || isUintType(a) || isIntType(b) || isUintType(b)) {
    if (a === b) return result(a);
    error();
  }
  if (a === "vec2") {
    if (b === "vec2" || isMat2(b)) return result("vec2");
    if (b === "mat3x2") return result("vec3");
    if (b === "mat4x2") return result("vec4");
    error();
  }
  if (a === "vec3") {
    if (b === "mat2x3") return result("vec2");
    if (b === "vec3" || isMat3(b)) return result("vec3");
    if (b === "mat4x3") return result("vec4");
    error();
  }
  if (a === "vec4") {
    if (b === "mat2x4") return result("vec2");
    if (b === "mat3x4") return result("vec3");
    if (b === "vec4" || isMat4(b)) return result("vec4");
    error();
  }
  if (b === "vec2") {
    if (isMat2(a)) return result("vec2");
    if (a === "mat2x3") return result("vec3");
    if (a === "mat2x4") return result("vec4");
    error();
  }
  if (b === "vec3") {
    if (a === "mat3x2") return result("vec2");
    if (isMat3(a)) return result("vec3");
    if (a === "mat3x4") return result("vec4");
    error();
  }
  if (b === "vec4") {
    if (a === "mat4x2") return result("vec2");
    if (a === "mat4x3") return result("vec3");
    if (isMat4(a)) return result("vec4");
    error();
  }
  if (isMat2(a)) {
    if (isMat2(b)) return result("mat2");
    if (b === "mat3x2") return result("mat3x2");
    if (b === "mat4x2") return result("mat4x2");
    error();
  }
  if (a === "mat2x3") {
    if (isMat2(b)) return result("mat2x3");
    if (b === "mat3x2") return result("mat3");
    if (b === "mat4x2") return result("mat4x3");
    error();
  }
  if (a === "mat2x4") {
    if (isMat2(b)) return result("mat2x4");
    if (b === "mat3x2") return result("mat3x4");
    if (b === "mat4x2") return result("mat4");
    error();
  }
  if (a === "mat3x2") {
    if (b === "mat2x3") return result("mat2");
    if (isMat3(b)) return result("mat3x2");
    if (b === "mat4x3") return result("mat4x2");
    error();
  }
  if (isMat3(a)) {
    if (b === "mat2x3") return result("mat2x3");
    if (isMat3(b)) return result("mat3");
    if (b === "mat4x3") return result("mat4x3");
    error();
  }
  if (a === "mat3x4") {
    if (b === "mat2x3") return result("mat2x4");
    if (isMat3(b)) return result("mat3x4");
    if (b === "mat4x3") return result("mat4");
    error();
  }
  if (a === "mat4x2") {
    if (b === "mat2x4") return result("mat2");
    if (b === "mat3x4") return result("mat3x2");
    if (isMat4(b)) return result("mat4x2");
    error();
  }
  if (a === "mat4x3") {
    if (b === "mat2x4") return result("mat2x3");
    if (b === "mat3x4") return result("mat3");
    if (isMat4(b)) return result("mat4x3");
    error();
  }
  if (isMat4(a)) {
    if (b === "mat2x4") return result("mat2x4");
    if (b === "mat3x4") return result("mat3x4");
    if (isMat4(b)) return result("mat4");
    error();
  }
  throw new Error(`Invalid mul types: ${a}, ${b}`);
}
__name(mulOutputType, "mulOutputType");
const add = /* @__PURE__ */ __name((a, b) => new Add({ a, b }), "add");
const sub = /* @__PURE__ */ __name((a, b) => new Sub({ a, b }), "sub");
const mul = /* @__PURE__ */ __name((a, b) => new Mul({ a, b }), "mul");
class Add extends BinaryOp {
  static {
    __name(this, "Add");
  }
  constructor({ a, b }) {
    super({ a, b, outKey: "sum", outTypeFunc: addOutputType });
    this.statements = ({ inputs, outputs }) => {
      return [`${outputs.sum} = ${inputs.a} + ${inputs.b};`];
    };
  }
}
class Sub extends BinaryOp {
  static {
    __name(this, "Sub");
  }
  constructor({ a, b }) {
    super({ a, b, outKey: "difference", outTypeFunc: subOutputType });
    this.statements = ({ inputs, outputs }) => {
      return [`${outputs.difference} = ${inputs.a} - ${inputs.b};`];
    };
  }
}
class Mul extends BinaryOp {
  static {
    __name(this, "Mul");
  }
  constructor({ a, b }) {
    super({ a, b, outKey: "product", outTypeFunc: mulOutputType });
    this.statements = ({ inputs, outputs }) => {
      return [`${outputs.product} = ${inputs.a} * ${inputs.b};`];
    };
  }
}
const floatBitsToUint = /* @__PURE__ */ __name((value) => new FloatBitsToUint({ value }), "floatBitsToUint");
const packHalf2x16 = /* @__PURE__ */ __name((value) => new PackHalf2x16({ value }), "packHalf2x16");
const uintToRgba8 = /* @__PURE__ */ __name((value) => new UintToRgba8({ value }), "uintToRgba8");
class FloatBitsToUint extends UnaryOp {
  static {
    __name(this, "FloatBitsToUint");
  }
  constructor({ value }) {
    super({ a: value, outKey: "uint", outTypeFunc: /* @__PURE__ */ __name(() => "uint", "outTypeFunc") });
    this.statements = ({ inputs, outputs }) => {
      return [`${outputs.uint} = floatBitsToUint(${inputs.a});`];
    };
  }
}
class PackHalf2x16 extends UnaryOp {
  static {
    __name(this, "PackHalf2x16");
  }
  constructor({ value }) {
    super({ a: value, outKey: "uint", outTypeFunc: /* @__PURE__ */ __name(() => "uint", "outTypeFunc") });
    this.statements = ({ inputs, outputs }) => {
      return [`${outputs.uint} = packHalf2x16(${inputs.a});`];
    };
  }
}
class UintToRgba8 extends UnaryOp {
  static {
    __name(this, "UintToRgba8");
  }
  constructor({ value }) {
    super({ a: value, outKey: "rgba8", outTypeFunc: /* @__PURE__ */ __name(() => "vec4", "outTypeFunc") });
    this.statements = ({ inputs, outputs }) => {
      return [
        `uvec4 uRgba = uvec4(${inputs.a} & 0xffu, (${inputs.a} >> 8u) & 0xffu, (${inputs.a} >> 16u) & 0xffu, (${inputs.a} >> 24u) & 0xffu);`,
        `${outputs.rgba8} = vec4(uRgba) / 255.0;`
      ];
    };
  }
}
const normalize = /* @__PURE__ */ __name((a) => new Normalize({ a }), "normalize");
const split = /* @__PURE__ */ __name((vector) => new Split({ vector }), "split");
const combine = /* @__PURE__ */ __name(({
  vector,
  vectorType,
  x,
  y,
  z,
  w,
  r,
  g,
  b,
  a
}) => new Combine({ vector, vectorType, x, y, z, w, r, g, b, a }), "combine");
const extendVec = /* @__PURE__ */ __name((a, b) => new ExtendVec({ a, b }), "extendVec");
class Normalize extends UnaryOp {
  static {
    __name(this, "Normalize");
  }
  constructor({ a }) {
    super({ a, outTypeFunc: /* @__PURE__ */ __name((aType) => aType, "outTypeFunc"), outKey: "normalize" });
    this.statements = ({ inputs, outputs }) => [
      `${outputs.normalize} = normalize(${inputs.a});`
    ];
  }
}
function extendVecOutputType(type) {
  if (type === "float") return "vec2";
  if (type === "vec2") return "vec3";
  if (type === "vec3") return "vec4";
  throw new Error("Invalid type");
}
__name(extendVecOutputType, "extendVecOutputType");
class ExtendVec extends BinaryOp {
  static {
    __name(this, "ExtendVec");
  }
  constructor({ a, b }) {
    const type = valType(a);
    const outType = extendVecOutputType(type);
    super({ a, b, outKey: "extend", outTypeFunc: /* @__PURE__ */ __name(() => outType, "outTypeFunc") });
    this.statements = ({ inputs, outputs }) => [
      `${outputs.extend} = ${outType}(${inputs.a}, ${inputs.b});`
    ];
  }
}
function splitOutTypes(type) {
  const result = /* @__PURE__ */ __name((value) => value, "result");
  switch (type) {
    case "vec2":
      return result({ x: "float", y: "float", r: "float", g: "float" });
    case "vec3":
      return result({
        x: "float",
        y: "float",
        z: "float",
        r: "float",
        g: "float",
        b: "float"
      });
    case "vec4":
      return result({
        x: "float",
        y: "float",
        z: "float",
        w: "float",
        r: "float",
        g: "float",
        b: "float",
        a: "float"
      });
    case "ivec2":
      return result({ x: "int", y: "int", r: "int", g: "int" });
    case "ivec3":
      return result({
        x: "int",
        y: "int",
        z: "int",
        r: "int",
        g: "int",
        b: "int"
      });
    case "ivec4":
      return result({
        x: "int",
        y: "int",
        z: "int",
        w: "int",
        r: "int",
        g: "int",
        b: "int",
        a: "int"
      });
    case "uvec2":
      return result({ x: "uint", y: "uint", r: "uint", g: "uint" });
    case "uvec3":
      return result({
        x: "uint",
        y: "uint",
        z: "uint",
        r: "uint",
        g: "uint",
        b: "uint"
      });
    case "uvec4":
      return result({
        x: "uint",
        y: "uint",
        z: "uint",
        w: "uint",
        r: "uint",
        g: "uint",
        b: "uint",
        a: "uint"
      });
    default:
      throw new Error(`Invalid vector type: ${type}`);
  }
}
__name(splitOutTypes, "splitOutTypes");
class Split extends Dyno {
  static {
    __name(this, "Split");
  }
  constructor({ vector }) {
    const type = valType(vector);
    const inTypes = { vector: type };
    const outTypes = splitOutTypes(inTypes.vector);
    super({ inTypes, outTypes, inputs: { vector } });
    this.statements = ({ inputs, outputs }) => {
      const { x, y, z, w, r, g, b, a } = outputs;
      const { vector: vector2 } = inputs;
      return [
        x ? `${x} = ${vector2}.x;` : null,
        y ? `${y} = ${vector2}.y;` : null,
        z ? `${z} = ${vector2}.z;` : null,
        w ? `${w} = ${vector2}.w;` : null,
        r ? `${r} = ${vector2}.r;` : null,
        g ? `${g} = ${vector2}.g;` : null,
        b ? `${b} = ${vector2}.b;` : null,
        a ? `${a} = ${vector2}.a;` : null
      ].filter(Boolean);
    };
  }
}
class Combine extends Dyno {
  static {
    __name(this, "Combine");
  }
  constructor({
    vector,
    vectorType,
    x,
    y,
    z,
    w,
    r,
    g,
    b,
    a
  }) {
    if (!vector && !vectorType) {
      throw new Error("Either vector or vectorType must be provided");
    }
    const vType = vectorType ?? valType(vector);
    const elType = vectorElementType(vType);
    const dim = vectorDim(vType);
    const inTypes = {
      vector: vType,
      x: elType,
      y: elType,
      r: elType,
      g: elType
    };
    const inputs = { vector, x, y, r, g };
    if (dim >= 3) {
      Object.assign(inTypes, { z: elType, b: elType });
      Object.assign(inputs, { z, b });
    }
    if (dim >= 4) {
      Object.assign(inTypes, { w: elType, a: elType });
      Object.assign(inputs, { w, a });
    }
    super({ inTypes, outTypes: { vector: vType }, inputs });
    this.statements = ({ inputs: inputs2, outputs }) => {
      const { vector: vector2 } = outputs;
      const {
        vector: input,
        x: x2,
        y: y2,
        z: z2,
        w: w2,
        r: r2,
        g: g2,
        b: b22,
        a: a2
      } = inputs2;
      const statements = [
        `${vector2}.x = ${x2 ?? r2 ?? (input ? `${input}.x` : literalZero(elType))};`,
        `${vector2}.y = ${y2 ?? g2 ?? (input ? `${input}.y` : literalZero(elType))};`
      ];
      if (dim >= 3)
        statements.push(
          `${vector2}.z = ${z2 ?? b22 ?? (input ? `${input}.z` : literalZero(elType))};`
        );
      if (dim >= 4)
        statements.push(
          `${vector2}.w = ${w2 ?? a2 ?? (input ? `${input}.w` : literalZero(elType))};`
        );
      return statements;
    };
  }
  dynoOut() {
    return new DynoOutput(
      this,
      "vector"
    );
  }
}
const transformPos = /* @__PURE__ */ __name((position, {
  scale,
  scales,
  rotate,
  translate
}) => {
  return new TransformPosition({ position, scale, scales, rotate, translate }).outputs.position;
}, "transformPos");
const transformDir = /* @__PURE__ */ __name((dir, {
  scale,
  scales,
  rotate
}) => {
  return new TransformDir({ dir, scale, scales, rotate }).outputs.dir;
}, "transformDir");
class TransformPosition extends Dyno {
  static {
    __name(this, "TransformPosition");
  }
  constructor({
    position,
    scale,
    scales,
    rotate,
    translate
  }) {
    super({
      inTypes: {
        position: "vec3",
        scale: "float",
        scales: "vec3",
        rotate: "vec4",
        translate: "vec3"
      },
      outTypes: { position: "vec3" },
      inputs: { position, scale, scales, rotate, translate },
      statements: /* @__PURE__ */ __name(({ inputs, outputs }) => {
        const { position: position2 } = outputs;
        if (!position2) {
          return [];
        }
        const { scale: scale2, scales: scales2, rotate: rotate2, translate: translate2 } = inputs;
        return [
          `${position2} = ${inputs.position ?? "vec3(0.0, 0.0, 0.0)"};`,
          !scale2 ? null : `${position2} *= ${scale2};`,
          !scales2 ? null : `${position2} *= ${scales2};`,
          !rotate2 ? null : `${position2} = quatVec(${rotate2}, ${position2});`,
          !translate2 ? null : `${position2} += ${translate2};`
        ].filter(Boolean);
      }, "statements")
    });
  }
}
class TransformDir extends Dyno {
  static {
    __name(this, "TransformDir");
  }
  constructor({
    dir,
    scale,
    scales,
    rotate
  }) {
    super({
      inTypes: { dir: "vec3", scale: "float", scales: "vec3", rotate: "vec4" },
      outTypes: { dir: "vec3" },
      inputs: { dir, scale, scales, rotate },
      statements: /* @__PURE__ */ __name(({ inputs, outputs }) => {
        const { dir: dir2 } = outputs;
        if (!dir2) {
          return [];
        }
        const { scale: scale2, scales: scales2, rotate: rotate2 } = inputs;
        return [
          `${dir2} = ${inputs.dir ?? "vec3(0.0, 0.0, 0.0)"};`,
          !scale2 ? null : `${dir2} *= ${scale2};`,
          !scales2 ? null : `${dir2} *= ${scales2};`,
          !rotate2 ? null : `${dir2} = quatVec(${rotate2}, ${dir2});`
        ].filter(Boolean);
      }, "statements")
    });
  }
}
var computeVec4_default = "precision highp float;\nprecision highp int;\nprecision highp sampler2D;\nprecision highp usampler2D;\nprecision highp isampler2D;\nprecision highp sampler2DArray;\nprecision highp usampler2DArray;\nprecision highp isampler2DArray;\nprecision highp sampler3D;\nprecision highp usampler3D;\nprecision highp isampler3D;\n\n#include <splatDefines>\n\nuniform uint targetLayer;\nuniform int targetBase;\nuniform int targetCount;\n\nout vec4 target;\n\n{{ GLOBALS }}\n\nvoid computeReadback(int index) {\n    {{ STATEMENTS }}\n}\n\nvoid main() {\n    int targetIndex = int(targetLayer << SPLAT_TEX_LAYER_BITS) + int(uint(gl_FragCoord.y) << SPLAT_TEX_WIDTH_BITS) + int(gl_FragCoord.x);\n    int index = targetIndex - targetBase;\n\n    if ((index >= 0) && (index < targetCount)) {\n        computeReadback(index);\n    } else {\n        target = vec4(0.0, 0.0, 0.0, 0.0);\n    }\n}";
const _Readback = class _Readback2 {
  static {
    __name(this, "_Readback");
  }
  constructor({ renderer } = {}) {
    this.renderer = renderer;
    this.capacity = 0;
    this.count = 0;
  }
  dispose() {
    if (this.target) {
      this.target.dispose();
      this.target = void 0;
    }
  }
  // Ensure we have a buffer large enough for the readback of count indices.
  // Pass in previous bufer of the desired type.
  ensureBuffer(count, buffer) {
    const roundedCount = Math.ceil(Math.max(1, count) / SPLAT_TEX_WIDTH) * SPLAT_TEX_WIDTH;
    const bytes = roundedCount * 4;
    if (buffer.byteLength >= bytes) {
      return buffer;
    }
    const newBuffer = new ArrayBuffer(bytes);
    if (buffer instanceof ArrayBuffer) {
      return newBuffer;
    }
    const ctor = buffer.constructor;
    return new ctor(newBuffer);
  }
  // Ensure our render target is large enough for the readback of capacity indices.
  ensureCapacity(capacity) {
    const { width, height, depth, maxSplats } = getTextureSize(capacity);
    if (!this.target || maxSplats > this.capacity) {
      this.dispose();
      this.capacity = maxSplats;
      this.target = new WebGLArrayRenderTarget(width, height, depth, {
        depthBuffer: false,
        stencilBuffer: false,
        generateMipmaps: false,
        magFilter: NearestFilter,
        minFilter: NearestFilter
      });
      this.target.texture.format = RGBAFormat;
      this.target.texture.type = UnsignedByteType;
      this.target.texture.internalFormat = "RGBA8";
      this.target.scissorTest = true;
    }
  }
  // Get a program and THREE.RawShaderMaterial for a given Rgba8Readback,
  // generating it if necessary and caching the result.
  prepareProgramMaterial(reader) {
    let program = _Readback2.readbackProgram.get(reader);
    if (!program) {
      const graph = dynoBlock(
        { index: "int" },
        { rgba8: "vec4" },
        ({ index }) => {
          reader.inputs.index = index;
          const rgba8 = new OutputRgba8({ rgba8: reader.outputs.rgba8 });
          return { rgba8 };
        }
      );
      if (!_Readback2.programTemplate) {
        _Readback2.programTemplate = new DynoProgramTemplate(computeVec4_default);
      }
      program = new DynoProgram({
        graph,
        inputs: { index: "index" },
        outputs: { rgba8: "target" },
        template: _Readback2.programTemplate
      });
      Object.assign(program.uniforms, {
        targetLayer: { value: 0 },
        targetBase: { value: 0 },
        targetCount: { value: 0 }
      });
      _Readback2.readbackProgram.set(reader, program);
    }
    const material = program.prepareMaterial();
    _Readback2.fullScreenQuad.material = material;
    return { program, material };
  }
  saveRenderState(renderer) {
    return {
      xrEnabled: renderer.xr.enabled,
      autoClear: renderer.autoClear
    };
  }
  resetRenderState(renderer, state) {
    renderer.setRenderTarget(null);
    renderer.xr.enabled = state.xrEnabled;
    renderer.autoClear = state.autoClear;
  }
  process({
    count,
    material
  }) {
    const renderer = this.renderer;
    if (!renderer) {
      throw new Error("No renderer");
    }
    if (!this.target) {
      throw new Error("No target");
    }
    const layerSize = SPLAT_TEX_WIDTH * SPLAT_TEX_HEIGHT;
    material.uniforms.targetBase.value = 0;
    material.uniforms.targetCount.value = count;
    let baseIndex = 0;
    while (baseIndex < count) {
      const layer = Math.floor(baseIndex / layerSize);
      const layerBase = layer * layerSize;
      const layerYEnd = Math.min(
        SPLAT_TEX_HEIGHT,
        Math.ceil((count - layerBase) / SPLAT_TEX_WIDTH)
      );
      material.uniforms.targetLayer.value = layer;
      this.target.scissor.set(0, 0, SPLAT_TEX_WIDTH, layerYEnd);
      renderer.setRenderTarget(this.target, layer);
      renderer.xr.enabled = false;
      renderer.autoClear = false;
      _Readback2.fullScreenQuad.render(renderer);
      baseIndex += SPLAT_TEX_WIDTH * layerYEnd;
    }
    this.count = count;
  }
  async read({
    readback
  }) {
    const renderer = this.renderer;
    if (!renderer) {
      throw new Error("No renderer");
    }
    if (!this.target) {
      throw new Error("No target");
    }
    const roundedCount = Math.ceil(this.count / SPLAT_TEX_WIDTH) * SPLAT_TEX_WIDTH;
    if (readback.byteLength < roundedCount * 4) {
      throw new Error(
        `Readback buffer too small: ${readback.byteLength} < ${roundedCount * 4}`
      );
    }
    const readbackUint8 = new Uint8Array(
      readback instanceof ArrayBuffer ? readback : readback.buffer
    );
    const layerSize = SPLAT_TEX_WIDTH * SPLAT_TEX_HEIGHT;
    let baseIndex = 0;
    const promises = [];
    while (baseIndex < this.count) {
      const layer = Math.floor(baseIndex / layerSize);
      const layerBase = layer * layerSize;
      const layerYEnd = Math.min(
        SPLAT_TEX_HEIGHT,
        Math.ceil((this.count - layerBase) / SPLAT_TEX_WIDTH)
      );
      renderer.setRenderTarget(this.target, layer);
      const readbackSize = SPLAT_TEX_WIDTH * layerYEnd * 4;
      const subReadback = readbackUint8.subarray(
        layerBase * 4,
        layerBase * 4 + readbackSize
      );
      const promise = renderer == null ? void 0 : renderer.readRenderTargetPixelsAsync(
        this.target,
        0,
        0,
        SPLAT_TEX_WIDTH,
        layerYEnd,
        subReadback
      );
      promises.push(promise);
      baseIndex += SPLAT_TEX_WIDTH * layerYEnd;
    }
    return Promise.all(promises).then(() => readback);
  }
  // Perform render operation to run the Rgba8Readback program
  // but don't perform the readback yet.
  render({
    reader,
    count,
    renderer
  }) {
    this.renderer = renderer || this.renderer;
    if (!this.renderer) {
      throw new Error("No renderer");
    }
    this.ensureCapacity(count);
    const { program, material } = this.prepareProgramMaterial(reader);
    program.update();
    const renderState = this.saveRenderState(this.renderer);
    this.process({ count, material });
    this.resetRenderState(this.renderer, renderState);
  }
  // Perform a readback of the render target, returning a buffer of the
  // given type.
  async readback({
    readback
  }) {
    if (!this.renderer) {
      throw new Error("No renderer");
    }
    const renderState = this.saveRenderState(this.renderer);
    const promise = this.read({ readback });
    this.resetRenderState(this.renderer, renderState);
    return promise;
  }
  // Perform a render and readback operation for the given Rgba8Readback,
  // and readback buffer (call ensureBuffer first).
  async renderReadback({
    reader,
    count,
    renderer,
    readback
  }) {
    this.renderer = renderer || this.renderer;
    if (!this.renderer) {
      throw new Error("No renderer");
    }
    this.ensureCapacity(count);
    const { program, material } = this.prepareProgramMaterial(reader);
    program.update();
    const renderState = this.saveRenderState(this.renderer);
    this.process({ count, material });
    const promise = this.read({ readback });
    this.resetRenderState(this.renderer, renderState);
    return promise;
  }
  getTexture() {
    var _a2;
    return (_a2 = this.target) == null ? void 0 : _a2.texture;
  }
};
_Readback.programTemplate = null;
_Readback.readbackProgram = /* @__PURE__ */ new Map();
_Readback.fullScreenQuad = new FullScreenQuad(
  new RawShaderMaterial({ visible: false })
);
let Readback = _Readback;
const _RgbaArray = class _RgbaArray2 {
  static {
    __name(this, "_RgbaArray");
  }
  constructor(options = {}) {
    this.capacity = 0;
    this.count = 0;
    this.array = null;
    this.readback = null;
    this.source = null;
    this.needsUpdate = true;
    this.dyno = new DynoUniform({
      key: "rgbaArray",
      type: TRgbaArray,
      globals: /* @__PURE__ */ __name(() => [defineRgbaArray], "globals"),
      value: {
        texture: _RgbaArray2.getEmpty(),
        count: 0
      },
      update: /* @__PURE__ */ __name((value) => {
        var _a2;
        value.texture = ((_a2 = this.readback) == null ? void 0 : _a2.getTexture()) ?? this.source ?? _RgbaArray2.getEmpty();
        value.count = this.count;
        return value;
      }, "update")
    });
    if (options.array) {
      this.array = options.array;
      this.capacity = Math.floor(this.array.length / 4);
      this.capacity = Math.floor(this.capacity / SPLAT_TEX_WIDTH) * SPLAT_TEX_WIDTH;
      this.count = Math.min(
        this.capacity,
        options.count ?? Number.POSITIVE_INFINITY
      );
    } else {
      this.capacity = options.capacity ?? 0;
      this.count = 0;
    }
  }
  // Free up resources
  dispose() {
    if (this.readback) {
      this.readback.dispose();
      this.readback = null;
    }
    if (this.source) {
      this.source.dispose();
      this.source = null;
    }
  }
  // Ensure that our array is large enough to hold capacity RGBA8 values.
  ensureCapacity(capacity) {
    var _a2;
    if (!this.array || capacity > (((_a2 = this.array) == null ? void 0 : _a2.length) ?? 0) / 4) {
      this.capacity = getTextureSize(capacity).maxSplats;
      const newArray2 = new Uint8Array(this.capacity * 4);
      if (this.array) {
        newArray2.set(this.array);
      }
      this.array = newArray2;
    }
    return this.array;
  }
  // Get the THREE.DataArrayTexture from either the readback or the source.
  getTexture() {
    var _a2;
    let texture2 = (_a2 = this.readback) == null ? void 0 : _a2.getTexture();
    if (this.source || this.array) {
      texture2 = this.maybeUpdateSource();
    }
    return texture2 ?? _RgbaArray2.getEmpty();
  }
  // Create or get a THREE.DataArrayTexture from the data array.
  maybeUpdateSource() {
    if (!this.array) {
      throw new Error("No array");
    }
    if (this.needsUpdate || !this.source) {
      this.needsUpdate = false;
      if (this.source) {
        const { width, height, depth } = this.source.image;
        if (this.capacity !== width * height * depth) {
          this.source.dispose();
          this.source = null;
        }
      }
      if (!this.source) {
        const { width, height, depth } = getTextureSize(this.capacity);
        this.source = new DataArrayTexture(
          this.array,
          width,
          height,
          depth
        );
        this.source.format = RGBAFormat;
        this.source.type = UnsignedByteType;
        this.source.internalFormat = "RGBA8";
        this.source.needsUpdate = true;
      } else if (this.array.buffer !== this.source.image.data.buffer) {
        this.source.image.data = new Uint8Array(this.array.buffer);
      }
      this.source.needsUpdate = true;
    }
    return this.source;
  }
  // Generate the RGBA8 values from a Rgba8Readback dyno program.
  render({
    reader,
    count,
    renderer
  }) {
    if (!this.readback) {
      this.readback = new Readback({ renderer });
    }
    this.readback.render({ reader, count, renderer });
    this.capacity = this.readback.capacity;
    this.count = this.readback.count;
  }
  // Extract the RGBA8 values from a PackedSplats collection.
  fromPackedSplats({
    packedSplats,
    base,
    count,
    renderer
  }) {
    const { dynoSplats, dynoBase, dynoCount, reader } = _RgbaArray2.makeDynos();
    dynoSplats.packedSplats = packedSplats;
    dynoBase.value = base;
    dynoCount.value = count;
    this.render({ reader, count, renderer });
    return this;
  }
  // Read back the RGBA8 values from the readback buffer.
  async read() {
    if (!this.readback) {
      throw new Error("No readback");
    }
    if (!this.array || this.array.length < this.count * 4) {
      this.array = new Uint8Array(this.capacity * 4);
    }
    const result = await this.readback.readback({ readback: this.array });
    return result.subarray(0, this.count * 4);
  }
  // Can be used where you need an uninitialized THREE.DataArrayTexture like
  // a uniform you will update with the result of this.getTexture() later.
  static getEmpty() {
    if (!_RgbaArray2.emptySource) {
      const emptyArray = new Uint8Array(1 * 4);
      _RgbaArray2.emptySource = new DataArrayTexture(emptyArray, 1, 1, 1);
      _RgbaArray2.emptySource.format = RGBAFormat;
      _RgbaArray2.emptySource.type = UnsignedByteType;
      _RgbaArray2.emptySource.internalFormat = "RGBA8";
      _RgbaArray2.emptySource.needsUpdate = true;
    }
    return _RgbaArray2.emptySource;
  }
  // Create a dyno program that can extract RGBA8 values from a PackedSplats
  static makeDynos() {
    if (!_RgbaArray2.dynos) {
      const dynoSplats = new DynoPackedSplats();
      const dynoBase = new DynoInt({ value: 0 });
      const dynoCount = new DynoInt({ value: 0 });
      const reader = dynoBlock(
        { index: "int" },
        { rgba8: "vec4" },
        ({ index }) => {
          if (!index) {
            throw new Error("index is undefined");
          }
          index = add(index, dynoBase);
          const gsplat = readPackedSplatRange(
            dynoSplats,
            index,
            dynoBase,
            dynoCount
          );
          return { rgba8: splitGsplat(gsplat).outputs.rgba };
        }
      );
      _RgbaArray2.dynos = { dynoSplats, dynoBase, dynoCount, reader };
    }
    return _RgbaArray2.dynos;
  }
};
_RgbaArray.emptySource = null;
_RgbaArray.dynos = null;
let RgbaArray = _RgbaArray;
const TRgbaArray = { type: "RgbaArray" };
const defineRgbaArray = unindent(`
  struct RgbaArray {
    sampler2DArray texture;
    int count;
  };
`);
function readRgbaArray(rgba, index) {
  const dyno2 = new Dyno({
    inTypes: { rgba: TRgbaArray, index: "int" },
    outTypes: { rgba: "vec4" },
    inputs: { rgba, index },
    globals: /* @__PURE__ */ __name(() => [defineRgbaArray], "globals"),
    statements: /* @__PURE__ */ __name(({ inputs, outputs }) => unindentLines(`
        if ((index >= 0) && (index < ${inputs.rgba}.count)) {
          ${outputs.rgba} = texelFetch(${inputs.rgba}.texture, splatTexCoord(index), 0);
        } else {
          ${outputs.rgba} = vec4(0.0, 0.0, 0.0, 0.0);
        }
      `), "statements")
  });
  return dyno2.outputs.rgba;
}
__name(readRgbaArray, "readRgbaArray");
function sdfTypeToNumber(type) {
  switch (type) {
    case "all":
      return 0;
    case "plane":
      return 1;
    case "sphere":
      return 2;
    case "box":
      return 3;
    case "ellipsoid":
      return 4;
    case "cylinder":
      return 5;
    case "capsule":
      return 6;
    case "infinite_cone":
      return 7;
    default:
      throw new Error(`Unknown SDF type: ${type}`);
  }
}
__name(sdfTypeToNumber, "sdfTypeToNumber");
function rgbaBlendModeToNumber(mode) {
  switch (mode) {
    case "multiply":
      return 0;
    case "set_rgb":
      return 1;
    case "add_rgba":
      return 2;
    default:
      throw new Error(`Unknown blend mode: ${mode}`);
  }
}
__name(rgbaBlendModeToNumber, "rgbaBlendModeToNumber");
class SplatEditSdf extends Object3D {
  static {
    __name(this, "SplatEditSdf");
  }
  constructor(options = {}) {
    super();
    const { type, invert, opacity, color, displace, radius } = options;
    this.type = type ?? "sphere";
    this.invert = invert ?? false;
    this.opacity = opacity ?? 1;
    this.color = color ?? new Color(1, 1, 1);
    this.displace = displace ?? new Vector3(0, 0, 0);
    this.radius = radius ?? 0;
  }
}
const _SplatEdit = class _SplatEdit2 extends Object3D {
  static {
    __name(this, "_SplatEdit");
  }
  constructor(options = {}) {
    const {
      name,
      rgbaBlendMode = "multiply",
      sdfSmooth = 0,
      softEdge = 0,
      invert = false,
      sdfs = null
    } = options;
    super();
    this.rgbaBlendMode = rgbaBlendMode;
    this.sdfSmooth = sdfSmooth;
    this.softEdge = softEdge;
    this.invert = invert;
    this.sdfs = sdfs;
    this.ordering = _SplatEdit2.nextOrdering++;
    this.name = name ?? `Edit ${this.ordering}`;
  }
  addSdf(sdf) {
    if (this.sdfs == null) {
      this.sdfs = [];
    }
    if (!this.sdfs.includes(sdf)) {
      this.sdfs.push(sdf);
    }
  }
  removeSdf(sdf) {
    if (this.sdfs == null) {
      return;
    }
    this.sdfs = this.sdfs.filter((s) => s !== sdf);
  }
};
_SplatEdit.nextOrdering = 1;
let SplatEdit = _SplatEdit;
class SplatEdits {
  static {
    __name(this, "SplatEdits");
  }
  constructor({ maxSdfs, maxEdits }) {
    this.maxSdfs = Math.max(16, maxSdfs ?? 0);
    this.numSdfs = 0;
    this.sdfData = new Uint32Array(this.maxSdfs * 8 * 4);
    this.sdfFloatData = new Float32Array(this.sdfData.buffer);
    this.sdfTexture = this.newSdfTexture(this.sdfData, this.maxSdfs);
    this.dynoSdfArray = new DynoUniform({
      key: "sdfArray",
      type: SdfArray,
      globals: /* @__PURE__ */ __name(() => [defineSdfArray], "globals"),
      value: {
        numSdfs: 0,
        sdfTexture: this.sdfTexture
      },
      update: /* @__PURE__ */ __name((uniform2) => {
        uniform2.numSdfs = this.numSdfs;
        uniform2.sdfTexture = this.sdfTexture;
        return uniform2;
      }, "update")
    });
    this.maxEdits = Math.max(16, maxEdits ?? 0);
    this.numEdits = 0;
    this.editData = new Uint32Array(this.maxEdits * 4);
    this.editFloatData = new Float32Array(this.editData.buffer);
    this.dynoNumEdits = new DynoInt({ value: 0 });
    this.dynoEdits = this.newEdits(this.editData, this.maxEdits);
  }
  newSdfTexture(data, maxSdfs) {
    const texture2 = new DataTexture(
      data,
      8,
      maxSdfs,
      RGBAIntegerFormat,
      UnsignedIntType
    );
    texture2.internalFormat = "RGBA32UI";
    texture2.needsUpdate = true;
    return texture2;
  }
  newEdits(data, maxEdits) {
    return new DynoUniform({
      key: "edits",
      type: "uvec4",
      count: maxEdits,
      globals: /* @__PURE__ */ __name(() => [defineEdit], "globals"),
      value: data
    });
  }
  // Ensure our SDF texture and edits uniform array have enough capacity.
  // Reallocate if not.
  ensureCapacity({
    maxSdfs,
    maxEdits
  }) {
    let dynoUpdated = false;
    if (maxSdfs > this.sdfTexture.image.height) {
      this.sdfTexture.dispose();
      this.maxSdfs = Math.max(this.maxSdfs * 2, maxSdfs);
      this.sdfData = new Uint32Array(this.maxSdfs * 8 * 4);
      this.sdfFloatData = new Float32Array(this.sdfData.buffer);
      this.sdfTexture = this.newSdfTexture(this.sdfData, this.maxSdfs);
    }
    if (maxEdits > (this.dynoEdits.count ?? 0)) {
      this.maxEdits = Math.max(this.maxEdits * 2, maxEdits);
      this.editData = new Uint32Array(this.maxEdits * 4);
      this.editFloatData = new Float32Array(this.editData.buffer);
      this.dynoEdits = this.newEdits(this.editData, this.maxEdits);
      dynoUpdated = true;
    }
    return dynoUpdated;
  }
  updateEditData(offset, value) {
    const updated = this.editData[offset] !== value;
    this.editData[offset] = value;
    return updated;
  }
  updateEditFloatData(offset, value) {
    tempFloat32[0] = value;
    const updated = this.editFloatData[offset] !== tempFloat32[0];
    if (updated) {
      this.editFloatData[offset] = tempFloat32[0];
    }
    return updated;
  }
  encodeEdit(editIndex, {
    sdfFirst,
    sdfCount,
    invert,
    rgbaBlendMode,
    softEdge,
    sdfSmooth
  }) {
    const base = editIndex * 4;
    let updated = false;
    updated = this.updateEditData(base + 0, rgbaBlendMode | (invert ? 1 << 8 : 0)) || updated;
    updated = this.updateEditData(base + 1, sdfFirst | sdfCount << 16) || updated;
    updated = this.updateEditFloatData(base + 2, softEdge) || updated;
    updated = this.updateEditFloatData(base + 3, sdfSmooth) || updated;
    return updated;
  }
  updateSdfData(offset, value) {
    const updated = this.sdfData[offset] !== value;
    this.sdfData[offset] = value;
    return updated;
  }
  updateSdfFloatData(offset, value) {
    tempFloat32[0] = value;
    const updated = this.sdfFloatData[offset] !== tempFloat32[0];
    if (updated) {
      this.sdfFloatData[offset] = tempFloat32[0];
    }
    return updated;
  }
  encodeSdf(sdfIndex, {
    sdfType,
    invert,
    center,
    quaternion,
    scale,
    sizes
  }, values) {
    const base = sdfIndex * (8 * 4);
    const flags = sdfType | (invert ? 1 << 8 : 0);
    let updated = false;
    updated = this.updateSdfFloatData(base + 0, (center == null ? void 0 : center.x) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 1, (center == null ? void 0 : center.y) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 2, (center == null ? void 0 : center.z) ?? 0) || updated;
    updated = this.updateSdfData(base + 3, flags) || updated;
    updated = this.updateSdfFloatData(base + 4, (quaternion == null ? void 0 : quaternion.x) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 5, (quaternion == null ? void 0 : quaternion.y) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 6, (quaternion == null ? void 0 : quaternion.z) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 7, (quaternion == null ? void 0 : quaternion.w) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 8, (scale == null ? void 0 : scale.x) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 9, (scale == null ? void 0 : scale.y) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 10, (scale == null ? void 0 : scale.z) ?? 0) || updated;
    updated = this.updateSdfData(base + 11, 0) || updated;
    updated = this.updateSdfFloatData(base + 12, (sizes == null ? void 0 : sizes.x) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 13, (sizes == null ? void 0 : sizes.y) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 14, (sizes == null ? void 0 : sizes.z) ?? 0) || updated;
    updated = this.updateSdfFloatData(base + 15, (sizes == null ? void 0 : sizes.w) ?? 0) || updated;
    const nValues = Math.min(4, values.length);
    for (let i = 0; i < nValues; ++i) {
      const vBase = base + 16 + i * 4;
      updated = this.updateSdfFloatData(vBase + 0, values[i].x) || updated;
      updated = this.updateSdfFloatData(vBase + 1, values[i].y) || updated;
      updated = this.updateSdfFloatData(vBase + 2, values[i].z) || updated;
      updated = this.updateSdfFloatData(vBase + 3, values[i].w) || updated;
    }
    return updated;
  }
  // Update the SDFs and edits from an array of SplatEdits and their
  // associated SplatEditSdfs, updating it for the dyno shader program.
  update(edits) {
    const sdfCount = edits.reduce((total, { sdfs }) => total + sdfs.length, 0);
    const dynoUpdated = this.ensureCapacity({
      maxEdits: edits.length,
      maxSdfs: sdfCount
    });
    const values = [new Vector4(), new Vector4()];
    const center = new Vector3();
    const quaternion = new Quaternion();
    const scale = new Vector3();
    const sizes = new Vector4();
    let sdfIndex = 0;
    let updated = dynoUpdated;
    if (edits.length !== this.dynoNumEdits.value) {
      this.dynoNumEdits.value = edits.length;
      this.numEdits = edits.length;
      updated = true;
    }
    for (const [editIndex, { edit, sdfs }] of edits.entries()) {
      updated = this.encodeEdit(editIndex, {
        sdfFirst: sdfIndex,
        sdfCount: sdfs.length,
        invert: edit.invert,
        rgbaBlendMode: rgbaBlendModeToNumber(edit.rgbaBlendMode),
        softEdge: edit.softEdge,
        sdfSmooth: edit.sdfSmooth
      }) || updated;
      let sdfUpdated = false;
      for (const sdf of sdfs) {
        sizes.set(sdf.scale.x, sdf.scale.y, sdf.scale.z, sdf.radius);
        sdf.scale.setScalar(1);
        sdf.updateMatrixWorld();
        const worldToSdf = sdf.matrixWorld.clone().invert();
        worldToSdf.decompose(center, quaternion, scale);
        sdf.scale.set(sizes.x, sizes.y, sizes.z);
        sdf.updateMatrixWorld();
        values[0].set(sdf.color.r, sdf.color.g, sdf.color.b, sdf.opacity);
        values[1].set(sdf.displace.x, sdf.displace.y, sdf.displace.z, 1);
        sdfUpdated = this.encodeSdf(
          sdfIndex,
          {
            sdfType: sdfTypeToNumber(sdf.type),
            invert: sdf.invert,
            center,
            quaternion,
            scale,
            sizes
          },
          values
        ) || sdfUpdated;
        sdfIndex += 1;
      }
      this.numSdfs = sdfIndex;
      if (sdfUpdated) {
        this.sdfTexture.needsUpdate = true;
      }
      updated || (updated = sdfUpdated);
    }
    return { updated, dynoUpdated };
  }
  // Modify a Gsplat in a dyno shader program using the current edits and SDFs.
  modify(gsplat) {
    return applyGsplatRgbaDisplaceEdits(
      gsplat,
      this.dynoSdfArray,
      this.dynoNumEdits,
      this.dynoEdits
    );
  }
}
const SdfArray = { type: "SdfArray" };
const defineSdfArray = unindent(`
  struct SdfArray {
    int numSdfs;
    usampler2D sdfTexture;
  };

  void unpackSdfArray(
    usampler2D sdfTexture, int sdfIndex, out uint flags,
    out vec3 center, out vec4 quaternion, out vec3 scale, out vec4 sizes,
    int numValues, out vec4 values[4]
  ) {
    uvec4 temp = texelFetch(sdfTexture, ivec2(0, sdfIndex), 0);
    flags = temp.w;
    center = vec3(uintBitsToFloat(temp.x), uintBitsToFloat(temp.y), uintBitsToFloat(temp.z));

    temp = texelFetch(sdfTexture, ivec2(1, sdfIndex), 0);
    quaternion = vec4(uintBitsToFloat(temp.x), uintBitsToFloat(temp.y), uintBitsToFloat(temp.z), uintBitsToFloat(temp.w));

    temp = texelFetch(sdfTexture, ivec2(2, sdfIndex), 0);
    scale = vec3(uintBitsToFloat(temp.x), uintBitsToFloat(temp.y), uintBitsToFloat(temp.z));

    temp = texelFetch(sdfTexture, ivec2(3, sdfIndex), 0);
    sizes = vec4(uintBitsToFloat(temp.x), uintBitsToFloat(temp.y), uintBitsToFloat(temp.z), uintBitsToFloat(temp.w));

    for (int i = 0; i < numValues; ++i) {
      temp = texelFetch(sdfTexture, ivec2(4 + i, sdfIndex), 0);
      values[i] = vec4(uintBitsToFloat(temp.x), uintBitsToFloat(temp.y), uintBitsToFloat(temp.z), uintBitsToFloat(temp.w));
    }
  }

  const uint SDF_FLAG_TYPE = 0xFFu;
  const uint SDF_FLAG_INVERT = 1u << 8u;

  const uint SDF_TYPE_ALL = 0u;
  const uint SDF_TYPE_PLANE = 1u;
  const uint SDF_TYPE_SPHERE = 2u;
  const uint SDF_TYPE_BOX = 3u;
  const uint SDF_TYPE_ELLIPSOID = 4u;
  const uint SDF_TYPE_CYLINDER = 5u;
  const uint SDF_TYPE_CAPSULE = 6u;
  const uint SDF_TYPE_INFINITE_CONE = 7u;

  float evaluateSdfArray(
    usampler2D sdfTexture, int numSdfs, int sdfFirst, int sdfCount, vec3 pos,
    float smoothK, int numValues, out vec4 outValues[4]
  ) {
    float distanceAccum = (smoothK == 0.0) ? 1.0 / 0.0 : 0.0;
    float maxExp = -1.0 / 0.0;
    for (int i = 0; i < numValues; ++i) {
        outValues[i] = vec4(0.0);
    }

    uint flags;
    vec3 center, scale;
    vec4 quaternion, sizes;
    vec4 values[4];

    int sdfLast = min(sdfFirst + sdfCount, numSdfs);
    for (int index = sdfFirst; index < sdfLast; ++index) {
      unpackSdfArray(sdfTexture, index, flags, center, quaternion, scale, sizes, numValues, values);
      uint sdfType = flags & SDF_FLAG_TYPE;
      vec3 sdfPos = quatVec(quaternion, pos * scale) + center;

      float distance;
      switch (sdfType) {
        case SDF_TYPE_ALL:
          distance = -1.0 / 0.0;
          break;
        case SDF_TYPE_PLANE: {
          distance = sdfPos.z;
          break;
        }
        case SDF_TYPE_SPHERE: {
          distance = length(sdfPos) - sizes.w;
          break;
        }
        case SDF_TYPE_BOX: {
          vec3 q = abs(sdfPos) - sizes.xyz + sizes.w;
          distance = length(max(q, 0.0)) + min(max(q.x, max(q.y, q.z)), 0.0) - sizes.w;
          break;
        }
        case SDF_TYPE_ELLIPSOID: {
          vec3 sizes = sizes.xyz;
          float k0 = length(sdfPos / sizes);
          float k1 = length(sdfPos / dot(sizes, sizes));
          distance = k0 * (k0 - 1.0) / k1;
          break;
        }
        case SDF_TYPE_CYLINDER: {
          vec2 d = abs(vec2(length(sdfPos.xz), sdfPos.y)) - sizes.wy;
          distance = min(max(d.x, d.y), 0.0) + length(max(d, 0.0));
          break;
        }
        case SDF_TYPE_CAPSULE: {
          sdfPos.y -= clamp(sdfPos.y, -0.5 * sizes.y, 0.5 * sizes.y);
          distance = length(sdfPos) - sizes.w;
          break;
        }
        case SDF_TYPE_INFINITE_CONE: {
          float angle = 0.25 * PI * sizes.w;
          vec2 c = vec2(sin(angle), cos(angle));
          vec2 q = vec2(length(sdfPos.xy), -sdfPos.z);
          float d = length(q - c * max(dot(q, c), 0.0));
          distance = d * (((q.x * c.y - q.y * c.x) < 0.0) ? -1.0 : 1.0);
          break;
        }
      }

      if ((flags & SDF_FLAG_INVERT) != 0u) {
        distance = -distance;
      }

      if (smoothK == 0.0) {
        if (distance < distanceAccum) {
          distanceAccum = distance;
          for (int i = 0; i < numValues; ++i) {
            outValues[i] = values[i];
          }
        }
      } else {
        float scaledDistance = -distance / smoothK;
        if (scaledDistance > maxExp) {
          float scale = exp(maxExp - scaledDistance);
          distanceAccum *= scale;
          for (int i = 0; i < numValues; ++i) {
            outValues[i] *= scale;
          }
          maxExp = scaledDistance;
        }

        float weight = exp(scaledDistance - maxExp);
        distanceAccum += weight;
        for (int i = 0; i < numValues; ++i) {
          outValues[i] += weight * values[i];
        }
      }
    }

    if (smoothK == 0.0) {
      return distanceAccum;
    } else {
      // Very distant SDFs may result in 0 accumulation
      if (distanceAccum == 0.0) {
        return 1.0 / 0.0;
      }
      for (int i = 0; i < numValues; ++i) {
        outValues[i] /= distanceAccum;
      }
      return (-log(distanceAccum) - maxExp) * smoothK;
    }
  }

  float modulateSdfArray(
    usampler2D sdfTexture, int numSdfs, int sdfFirst, int sdfCount, vec3 pos,
    float smoothK, int numValues, out vec4 values[4],
    float softEdge, bool invert
  ) {
    float distance = evaluateSdfArray(sdfTexture, numSdfs, sdfFirst, sdfCount, pos, smoothK, numValues, values);
    if (invert) {
      distance = -distance;
    }

    return (softEdge == 0.0) ? ((distance < 0.0) ? 1.0 : 0.0)
      : clamp(-distance / softEdge + 0.5, 0.0, 1.0);
  }
`);
const defineEdit = unindent(`
  const uint EDIT_FLAG_BLEND = 0xFFu;
  const uint EDIT_BLEND_MULTIPLY = 0u;
  const uint EDIT_BLEND_SET_RGB = 1u;
  const uint EDIT_BLEND_ADD_RGBA = 2u;
  const uint EDIT_FLAG_INVERT = 0x100u;

  void decodeEdit(
    uvec4 packedEdit, out int sdfFirst, out int sdfCount,
    out bool invert, out uint rgbaBlendMode, out float softEdge, out float sdfSmooth
  ) {
    rgbaBlendMode = packedEdit.x & EDIT_FLAG_BLEND;
    invert = (packedEdit.x & EDIT_FLAG_INVERT) != 0u;

    sdfFirst = int(packedEdit.y & 0xFFFFu);
    sdfCount = int(packedEdit.y >> 16u);

    softEdge = uintBitsToFloat(packedEdit.z);
    sdfSmooth = uintBitsToFloat(packedEdit.w);
  }

  void applyRgbaDisplaceEdit(
    usampler2D sdfTexture, int numSdfs, int sdfFirst, int sdfCount, inout vec3 pos,
    float smoothK, float softEdge, bool invert, uint rgbaBlendMode, inout vec4 rgba
  ) {
    vec4 values[4];
    float modulate = modulateSdfArray(sdfTexture, numSdfs, sdfFirst, sdfCount, pos, smoothK, 2, values, softEdge, invert);
    // On Android, moving values[0] is necessary to work around a compiler bug.
    vec4 sdfRgba = values[0];
    vec4 sdfDisplaceScale = values[1];

    vec4 target;
    switch (rgbaBlendMode) {
      case EDIT_BLEND_MULTIPLY:
        target = rgba * sdfRgba;
        break;
      case EDIT_BLEND_SET_RGB:
        target = vec4(sdfRgba.rgb, rgba.a * sdfRgba.a);
        break;
      case EDIT_BLEND_ADD_RGBA:
        target = rgba + sdfRgba;
        break;
      default:
        // Debug output if blend mode not set
        target = vec4(fract(pos), 1.0);
    }
    rgba = mix(rgba, target, modulate);
    pos += sdfDisplaceScale.xyz * modulate;
  }

  void applyPackedRgbaDisplaceEdit(uvec4 packedEdit, usampler2D sdfTexture, int numSdfs, inout vec3 pos, inout vec4 rgba) {
    int sdfFirst, sdfCount;
    bool invert;
    uint rgbaBlendMode;
    float softEdge, sdfSmooth;
    decodeEdit(packedEdit, sdfFirst, sdfCount, invert, rgbaBlendMode, softEdge, sdfSmooth);
    applyRgbaDisplaceEdit(sdfTexture, numSdfs, sdfFirst, sdfCount, pos, sdfSmooth, softEdge, invert, rgbaBlendMode, rgba);
  }
`);
function applyGsplatRgbaDisplaceEdits(gsplat, sdfArray, numEdits, rgbaDisplaceEdits) {
  const dyno2 = new Dyno({
    inTypes: {
      gsplat: Gsplat,
      sdfArray: SdfArray,
      numEdits: "int",
      rgbaDisplaceEdits: "uvec4"
    },
    outTypes: { gsplat: Gsplat },
    globals: /* @__PURE__ */ __name(() => [defineSdfArray, defineEdit], "globals"),
    inputs: { gsplat, sdfArray, numEdits, rgbaDisplaceEdits },
    statements: /* @__PURE__ */ __name(({ inputs, outputs }) => {
      const { sdfArray: sdfArray2, numEdits: numEdits2, rgbaDisplaceEdits: rgbaDisplaceEdits2 } = inputs;
      const { gsplat: gsplat2 } = outputs;
      return unindentLines(`
        ${gsplat2} = ${inputs.gsplat};
        if (isGsplatActive(${gsplat2}.flags)) {
          for (int editIndex = 0; editIndex < ${numEdits2}; ++editIndex) {
            applyPackedRgbaDisplaceEdit(
              ${rgbaDisplaceEdits2}[editIndex], ${sdfArray2}.sdfTexture, ${sdfArray2}.numSdfs,
              ${gsplat2}.center, ${gsplat2}.rgba
            );
          }
        }
      `);
    }, "statements")
  });
  return dyno2.outputs.gsplat;
}
__name(applyGsplatRgbaDisplaceEdits, "applyGsplatRgbaDisplaceEdits");
const tempFloat32 = new Float32Array(1);
class SplatModifier {
  static {
    __name(this, "SplatModifier");
  }
  constructor(modifier) {
    this.modifier = modifier;
    this.cache = /* @__PURE__ */ new Map();
  }
  apply(generator) {
    let modified = this.cache.get(generator);
    if (!modified) {
      modified = dynoBlock(
        { index: "int" },
        { gsplat: Gsplat },
        ({ index }) => {
          const { gsplat } = generator.apply({ index });
          return this.modifier.apply({ gsplat });
        }
      );
      this.cache.set(generator, modified);
    }
    return modified;
  }
}
class SplatTransformer {
  static {
    __name(this, "SplatTransformer");
  }
  // Create the dyno uniforms that parameterize the transform, setting them
  // to initial values that are different from any valid transform.
  constructor() {
    this.scale = new DynoFloat({ value: Number.NEGATIVE_INFINITY });
    this.rotate = new DynoVec4({
      value: new Quaternion(
        Number.POSITIVE_INFINITY,
        Number.POSITIVE_INFINITY,
        Number.POSITIVE_INFINITY,
        Number.POSITIVE_INFINITY
      )
    });
    this.translate = new DynoVec3({
      value: new Vector3(
        Number.POSITIVE_INFINITY,
        Number.POSITIVE_INFINITY,
        Number.POSITIVE_INFINITY
      )
    });
  }
  // Apply the transform to a Vec3 position in a dyno program.
  apply(position) {
    return transformPos(position, {
      scale: this.scale,
      rotate: this.rotate,
      translate: this.translate
    });
  }
  applyDir(dir) {
    return transformDir(dir, {
      rotate: this.rotate
    });
  }
  // Apply the transform to a Gsplat in a dyno program.
  applyGsplat(gsplat) {
    return transformGsplat(gsplat, {
      scale: this.scale,
      rotate: this.rotate,
      translate: this.translate
    });
  }
  // Update the uniforms to match the given transform matrix.
  updateFromMatrix(transform) {
    const scale = new Vector3();
    const quaternion = new Quaternion();
    const position = new Vector3();
    transform.decompose(position, quaternion, scale);
    const newScale = (scale.x + scale.y + scale.z) / 3;
    let updated = false;
    if (newScale !== this.scale.value) {
      this.scale.value = newScale;
      updated = true;
    }
    if (!position.equals(this.translate.value)) {
      this.translate.value.copy(position);
      updated = true;
    }
    if (!quaternion.equals(this.rotate.value)) {
      this.rotate.value.copy(quaternion);
      updated = true;
    }
    return updated;
  }
  // Update this transform to match the object's to-world transform.
  update(object) {
    object.updateMatrixWorld();
    return this.updateFromMatrix(object.matrixWorld);
  }
}
class SplatGenerator extends Object3D {
  static {
    __name(this, "SplatGenerator");
  }
  constructor({
    numSplats,
    generator,
    construct,
    update
  }) {
    super();
    this.numSplats = numSplats ?? 0;
    this.generator = generator;
    this.frameUpdate = update;
    this.version = 0;
    if (construct) {
      const constructed = construct(this);
      Object.assign(this, constructed);
    }
  }
  updateVersion() {
    this.version += 1;
  }
  set needsUpdate(value) {
    if (value) {
      this.updateVersion();
    }
  }
}
const _SplatMesh = class _SplatMesh2 extends SplatGenerator {
  static {
    __name(this, "_SplatMesh");
  }
  constructor(options = {}) {
    const transform = new SplatTransformer();
    const viewToWorld = new SplatTransformer();
    const worldToView = new SplatTransformer();
    const viewToObject = new SplatTransformer();
    const recolor = new DynoVec4({
      value: new Vector4(
        Number.NEGATIVE_INFINITY,
        Number.NEGATIVE_INFINITY,
        Number.NEGATIVE_INFINITY,
        Number.NEGATIVE_INFINITY
      )
    });
    const time = new DynoFloat({ value: 0 });
    const deltaTime = new DynoFloat({ value: 0 });
    const context = {
      transform,
      viewToWorld,
      worldToView,
      viewToObject,
      recolor,
      time,
      deltaTime
    };
    super({
      update: /* @__PURE__ */ __name(({ time: time2, deltaTime: deltaTime2, viewToWorld: viewToWorld2, globalEdits }) => this.update({ time: time2, deltaTime: deltaTime2, viewToWorld: viewToWorld2, globalEdits }), "update")
    });
    this.isInitialized = false;
    this.recolor = new Color(1, 1, 1);
    this.opacity = 1;
    this.enableViewToObject = false;
    this.enableViewToWorld = false;
    this.enableWorldToView = false;
    this.skinning = null;
    this.edits = null;
    this.rgbaDisplaceEdits = null;
    this.splatRgba = null;
    this.maxSh = 3;
    this.packedSplats = options.packedSplats ?? new PackedSplats();
    this.packedSplats.splatEncoding = options.splatEncoding ?? {
      ...DEFAULT_SPLAT_ENCODING
    };
    this.numSplats = this.packedSplats.numSplats;
    this.editable = options.editable ?? true;
    this.onFrame = options.onFrame;
    this.context = context;
    this.objectModifier = options.objectModifier;
    this.worldModifier = options.worldModifier;
    this.updateGenerator();
    if (options.url || options.fileBytes || options.constructSplats || options.packedSplats && !options.packedSplats.isInitialized) {
      this.initialized = this.asyncInitialize(options).then(async () => {
        this.updateGenerator();
        this.isInitialized = true;
        if (options.onLoad) {
          const maybePromise = options.onLoad(this);
          if (maybePromise instanceof Promise) {
            await maybePromise;
          }
        }
        return this;
      });
    } else {
      this.isInitialized = true;
      this.initialized = Promise.resolve(this);
      if (options.onLoad) {
        const maybePromise = options.onLoad(this);
        if (maybePromise instanceof Promise) {
          this.initialized = maybePromise.then(() => this);
        }
      }
    }
    this.add(createRendererDetectionMesh());
  }
  async asyncInitialize(options) {
    const {
      url,
      fileBytes,
      fileType,
      fileName,
      maxSplats,
      constructSplats,
      splatEncoding
    } = options;
    if (url || fileBytes || constructSplats) {
      const packedSplatsOptions = {
        url,
        fileBytes,
        fileType,
        fileName,
        maxSplats,
        construct: constructSplats,
        splatEncoding
      };
      this.packedSplats.reinitialize(packedSplatsOptions);
    }
    if (this.packedSplats) {
      await this.packedSplats.initialized;
      this.numSplats = this.packedSplats.numSplats;
      this.updateGenerator();
    }
  }
  static async staticInitialize() {
    await __wbg_init();
    _SplatMesh2.isStaticInitialized = true;
  }
  // Creates a new Gsplat with the provided parameters (all values in "float" space,
  // i.e. 0-1 for opacity and color) and adds it to the end of the packedSplats,
  // increasing numSplats by 1. If necessary, reallocates the buffer with an exponential
  // doubling strategy to fit the new data, so it's fairly efficient to just
  // pushSplat(...) each Gsplat you want to create in a loop.
  pushSplat(center, scales, quaternion, opacity, color) {
    this.packedSplats.pushSplat(center, scales, quaternion, opacity, color);
  }
  // This method iterates over all Gsplats in this instance's packedSplats,
  // invoking the provided callback with index: number in 0..=(this.numSplats-1) and
  // center: THREE.Vector3, scales: THREE.Vector3, quaternion: THREE.Quaternion,
  // opacity: number (0..1), and color: THREE.Color (rgb values in 0..1).
  // Note that the objects passed in as center etc. are the same for every callback
  // invocation: these objects are reused for efficiency. Changing these values has
  // no effect as they are decoded/unpacked copies of the underlying data. To update
  // the packedSplats, call .packedSplats.setSplat(index, center, scales,
  // quaternion, opacity, color).
  forEachSplat(callback) {
    this.packedSplats.forEachSplat(callback);
  }
  // Call this when you are finished with the SplatMesh and want to free
  // any buffers it holds (via packedSplats).
  dispose() {
    this.packedSplats.dispose();
  }
  // Returns axis-aligned bounding box of the SplatMesh. If centers_only is true,
  // only the centers of the splats are used to compute the bounding box.
  // IMPORTANT: This should only be called after the SplatMesh is initialized.
  getBoundingBox(centers_only = true) {
    if (!this.initialized) {
      throw new Error(
        "Cannot get bounding box before SplatMesh is initialized"
      );
    }
    const minVec = new Vector3(
      Number.POSITIVE_INFINITY,
      Number.POSITIVE_INFINITY,
      Number.POSITIVE_INFINITY
    );
    const maxVec = new Vector3(
      Number.NEGATIVE_INFINITY,
      Number.NEGATIVE_INFINITY,
      Number.NEGATIVE_INFINITY
    );
    const corners = new Vector3();
    const signs = [-1, 1];
    this.packedSplats.forEachSplat(
      (_index, center, scales, quaternion, _opacity, _color2) => {
        if (centers_only) {
          minVec.min(center);
          maxVec.max(center);
        } else {
          for (const x of signs) {
            for (const y of signs) {
              for (const z of signs) {
                corners.set(x * scales.x, y * scales.y, z * scales.z);
                corners.applyQuaternion(quaternion);
                corners.add(center);
                minVec.min(corners);
                maxVec.max(corners);
              }
            }
          }
        }
      }
    );
    const box = new Box3(minVec, maxVec);
    return box;
  }
  constructGenerator(context) {
    const { transform, viewToObject, recolor } = context;
    const generator = dynoBlock(
      { index: "int" },
      { gsplat: Gsplat },
      ({ index }) => {
        if (!index) {
          throw new Error("index is undefined");
        }
        let gsplat = readPackedSplat(this.packedSplats.dyno, index);
        if (this.maxSh >= 1) {
          const { sh1Texture, sh2Texture, sh3Texture } = this.ensureShTextures();
          if (sh1Texture) {
            let rescaleSh = /* @__PURE__ */ __name(function(sNorm, minMax) {
              const { x: min2, y: max2 } = split(minMax).outputs;
              const mid = mul(add(min2, max2), dynoConst("float", 0.5));
              const scale = mul(sub(max2, min2), dynoConst("float", 0.5));
              return add(mid, mul(sNorm, scale));
            }, "rescaleSh");
            const viewCenterInObject = viewToObject.translate;
            const { center } = splitGsplat(gsplat).outputs;
            const viewDir = normalize(sub(center, viewCenterInObject));
            const sh1Snorm = evaluateSH1(gsplat, sh1Texture, viewDir);
            let rgb = rescaleSh(sh1Snorm, this.packedSplats.dynoSh1MinMax);
            if (this.maxSh >= 2 && sh2Texture) {
              const sh2Snorm = evaluateSH2(gsplat, sh2Texture, viewDir);
              rgb = add(
                rgb,
                rescaleSh(sh2Snorm, this.packedSplats.dynoSh2MinMax)
              );
            }
            if (this.maxSh >= 3 && sh3Texture) {
              const sh3Snorm = evaluateSH3(gsplat, sh3Texture, viewDir);
              rgb = add(
                rgb,
                rescaleSh(sh3Snorm, this.packedSplats.dynoSh3MinMax)
              );
            }
            let { rgba } = splitGsplat(gsplat).outputs;
            rgba = add(rgba, extendVec(rgb, dynoConst("float", 0)));
            gsplat = combineGsplat({ gsplat, rgba });
          }
        }
        if (this.splatRgba) {
          const rgba = readRgbaArray(this.splatRgba.dyno, index);
          gsplat = combineGsplat({ gsplat, rgba });
        }
        if (this.skinning) {
          gsplat = this.skinning.modify(gsplat);
        }
        if (this.objectModifier) {
          gsplat = this.objectModifier.apply({ gsplat }).gsplat;
        }
        gsplat = transform.applyGsplat(gsplat);
        const recolorRgba = mul(recolor, splitGsplat(gsplat).outputs.rgba);
        gsplat = combineGsplat({ gsplat, rgba: recolorRgba });
        if (this.rgbaDisplaceEdits) {
          gsplat = this.rgbaDisplaceEdits.modify(gsplat);
        }
        if (this.worldModifier) {
          gsplat = this.worldModifier.apply({ gsplat }).gsplat;
        }
        return { gsplat };
      }
    );
    this.generator = generator;
  }
  // Call this whenever something changes in the Gsplat processing pipeline,
  // for example changing maxSh or updating objectModifier or worldModifier.
  // Compiled generators are cached for efficiency and re-use when the same
  // pipeline structure emerges after successive changes.
  updateGenerator() {
    this.constructGenerator(this.context);
  }
  // This is called automatically by SparkRenderer and you should not have to
  // call it. It updates parameters for the generated pipeline and calls
  // updateGenerator() if the pipeline needs to change.
  update({
    time,
    viewToWorld,
    deltaTime,
    globalEdits
  }) {
    var _a2;
    this.numSplats = this.packedSplats.numSplats;
    this.context.time.value = time;
    this.context.deltaTime.value = deltaTime;
    _SplatMesh2.dynoTime.value = time;
    const { transform, viewToObject, recolor } = this.context;
    let updated = transform.update(this);
    if (this.context.viewToWorld.updateFromMatrix(viewToWorld) && this.enableViewToWorld) {
      updated = true;
    }
    const worldToView = viewToWorld.clone().invert();
    if (this.context.worldToView.updateFromMatrix(worldToView) && this.enableWorldToView) {
      updated = true;
    }
    const objectToWorld = new Matrix4().compose(
      transform.translate.value,
      transform.rotate.value,
      new Vector3().setScalar(transform.scale.value)
    );
    const worldToObject = objectToWorld.invert();
    const viewToObjectMatrix = worldToObject.multiply(viewToWorld);
    if (viewToObject.updateFromMatrix(viewToObjectMatrix) && (this.enableViewToObject || this.packedSplats.extra.sh1)) {
      updated = true;
    }
    const newRecolor = new Vector4(
      this.recolor.r,
      this.recolor.g,
      this.recolor.b,
      this.opacity
    );
    if (!newRecolor.equals(recolor.value)) {
      recolor.value.copy(newRecolor);
      updated = true;
    }
    const edits = this.editable ? (this.edits ?? []).concat(globalEdits) : [];
    if (this.editable && !this.edits) {
      this.traverseVisible((node) => {
        if (node instanceof SplatEdit) {
          edits.push(node);
        }
      });
    }
    edits.sort((a, b) => a.ordering - b.ordering);
    const editsSdfs = edits.map((edit) => {
      if (edit.sdfs != null) {
        return { edit, sdfs: edit.sdfs };
      }
      const sdfs = [];
      edit.traverseVisible((node) => {
        if (node instanceof SplatEditSdf) {
          sdfs.push(node);
        }
      });
      return { edit, sdfs };
    });
    if (editsSdfs.length > 0 && !this.rgbaDisplaceEdits) {
      const edits2 = editsSdfs.length;
      const sdfs = editsSdfs.reduce(
        (total, edit) => total + edit.sdfs.length,
        0
      );
      this.rgbaDisplaceEdits = new SplatEdits({
        maxEdits: edits2,
        maxSdfs: sdfs
      });
      this.updateGenerator();
    }
    if (this.rgbaDisplaceEdits) {
      const editResult = this.rgbaDisplaceEdits.update(editsSdfs);
      updated || (updated = editResult.updated);
      if (editResult.dynoUpdated) {
        this.updateGenerator();
      }
    }
    if (updated) {
      this.updateVersion();
    }
    (_a2 = this.onFrame) == null ? void 0 : _a2.call(this, { mesh: this, time, deltaTime });
  }
  // This method conforms to the standard THREE.Raycaster API, performing object-ray
  // intersections using this method to populate the provided intersects[] array
  // with each intersection point.
  raycast(raycaster, intersects2) {
    var _a2, _b2;
    if (!this.packedSplats.packedArray || !this.packedSplats.numSplats) {
      return;
    }
    const { near, far, ray } = raycaster;
    const worldToMesh = this.matrixWorld.clone().invert();
    const worldToMeshRot = new Matrix3().setFromMatrix4(worldToMesh);
    const origin = ray.origin.clone().applyMatrix4(worldToMesh);
    const direction = ray.direction.clone().applyMatrix3(worldToMeshRot);
    const scales = new Vector3();
    worldToMesh.decompose(new Vector3(), new Quaternion(), scales);
    (scales.x * scales.y * scales.z) ** (1 / 3);
    const RAYCAST_ELLIPSOID = true;
    const distances = raycast_splats(
      origin.x,
      origin.y,
      origin.z,
      direction.x,
      direction.y,
      direction.z,
      near,
      far,
      this.packedSplats.numSplats,
      this.packedSplats.packedArray,
      RAYCAST_ELLIPSOID,
      ((_a2 = this.packedSplats.splatEncoding) == null ? void 0 : _a2.lnScaleMin) ?? LN_SCALE_MIN,
      ((_b2 = this.packedSplats.splatEncoding) == null ? void 0 : _b2.lnScaleMax) ?? LN_SCALE_MAX
    );
    for (const distance2 of distances) {
      const point = ray.direction.clone().multiplyScalar(distance2).add(ray.origin);
      intersects2.push({
        distance: distance2,
        point,
        object: this
      });
    }
  }
  ensureShTextures() {
    if (!this.packedSplats.extra.sh1) {
      return {};
    }
    let sh1Texture = this.packedSplats.extra.sh1Texture;
    if (!sh1Texture) {
      let sh1 = this.packedSplats.extra.sh1;
      const { width, height, depth, maxSplats } = getTextureSize(
        sh1.length / 2
      );
      if (sh1.length < maxSplats * 2) {
        const newSh1 = new Uint32Array(maxSplats * 2);
        newSh1.set(sh1);
        this.packedSplats.extra.sh1 = newSh1;
        sh1 = newSh1;
      }
      const texture2 = new DataArrayTexture(sh1, width, height, depth);
      texture2.format = RGIntegerFormat;
      texture2.type = UnsignedIntType;
      texture2.internalFormat = "RG32UI";
      texture2.needsUpdate = true;
      sh1Texture = new DynoUsampler2DArray({
        value: texture2,
        key: "sh1"
      });
      this.packedSplats.extra.sh1Texture = sh1Texture;
    }
    if (!this.packedSplats.extra.sh2) {
      return { sh1Texture };
    }
    let sh2Texture = this.packedSplats.extra.sh2Texture;
    if (!sh2Texture) {
      let sh2 = this.packedSplats.extra.sh2;
      const { width, height, depth, maxSplats } = getTextureSize(
        sh2.length / 4
      );
      if (sh2.length < maxSplats * 4) {
        const newSh2 = new Uint32Array(maxSplats * 4);
        newSh2.set(sh2);
        this.packedSplats.extra.sh2 = newSh2;
        sh2 = newSh2;
      }
      const texture2 = new DataArrayTexture(sh2, width, height, depth);
      texture2.format = RGBAIntegerFormat;
      texture2.type = UnsignedIntType;
      texture2.internalFormat = "RGBA32UI";
      texture2.needsUpdate = true;
      sh2Texture = new DynoUsampler2DArray({
        value: texture2,
        key: "sh2"
      });
      this.packedSplats.extra.sh2Texture = sh2Texture;
    }
    if (!this.packedSplats.extra.sh3) {
      return { sh1Texture, sh2Texture };
    }
    let sh3Texture = this.packedSplats.extra.sh3Texture;
    if (!sh3Texture) {
      let sh3 = this.packedSplats.extra.sh3;
      const { width, height, depth, maxSplats } = getTextureSize(
        sh3.length / 4
      );
      if (sh3.length < maxSplats * 4) {
        const newSh3 = new Uint32Array(maxSplats * 4);
        newSh3.set(sh3);
        this.packedSplats.extra.sh3 = newSh3;
        sh3 = newSh3;
      }
      const texture2 = new DataArrayTexture(sh3, width, height, depth);
      texture2.format = RGBAIntegerFormat;
      texture2.type = UnsignedIntType;
      texture2.internalFormat = "RGBA32UI";
      texture2.needsUpdate = true;
      sh3Texture = new DynoUsampler2DArray({
        value: texture2,
        key: "sh3"
      });
      this.packedSplats.extra.sh3Texture = sh3Texture;
    }
    return { sh1Texture, sh2Texture, sh3Texture };
  }
};
_SplatMesh.staticInitialized = _SplatMesh.staticInitialize();
_SplatMesh.isStaticInitialized = false;
_SplatMesh.dynoTime = new DynoFloat({ value: 0 });
let SplatMesh = _SplatMesh;
const defineEvaluateSH1 = unindent(`
  vec3 evaluateSH1(Gsplat gsplat, usampler2DArray sh1, vec3 viewDir) {
    // Extract sint7 values packed into 2 x uint32
    uvec2 packed = texelFetch(sh1, splatTexCoord(gsplat.index), 0).rg;
    vec3 sh1_0 = vec3(ivec3(
      int(packed.x << 25u) >> 25,
      int(packed.x << 18u) >> 25,
      int(packed.x << 11u) >> 25
    )) / 63.0;
    vec3 sh1_1 = vec3(ivec3(
      int(packed.x << 4u) >> 25,
      int((packed.x >> 3u) | (packed.y << 29u)) >> 25,
      int(packed.y << 22u) >> 25
    )) / 63.0;
    vec3 sh1_2 = vec3(ivec3(
      int(packed.y << 15u) >> 25,
      int(packed.y << 8u) >> 25,
      int(packed.y << 1u) >> 25
    )) / 63.0;

    return sh1_0 * (-0.4886025 * viewDir.y)
      + sh1_1 * (0.4886025 * viewDir.z)
      + sh1_2 * (-0.4886025 * viewDir.x);
  }
`);
const defineEvaluateSH2 = unindent(`
  vec3 evaluateSH2(Gsplat gsplat, usampler2DArray sh2, vec3 viewDir) {
    // Extract sint8 values packed into 4 x uint32
    uvec4 packed = texelFetch(sh2, splatTexCoord(gsplat.index), 0);
    vec3 sh2_0 = vec3(ivec3(
      int(packed.x << 24u) >> 24,
      int(packed.x << 16u) >> 24,
      int(packed.x << 8u) >> 24
    )) / 127.0;
    vec3 sh2_1 = vec3(ivec3(
      int(packed.x) >> 24,
      int(packed.y << 24u) >> 24,
      int(packed.y << 16u) >> 24
    )) / 127.0;
    vec3 sh2_2 = vec3(ivec3(
      int(packed.y << 8u) >> 24,
      int(packed.y) >> 24,
      int(packed.z << 24u) >> 24
    )) / 127.0;
    vec3 sh2_3 = vec3(ivec3(
      int(packed.z << 16u) >> 24,
      int(packed.z << 8u) >> 24,
      int(packed.z) >> 24
    )) / 127.0;
    vec3 sh2_4 = vec3(ivec3(
      int(packed.w << 24u) >> 24,
      int(packed.w << 16u) >> 24,
      int(packed.w << 8u) >> 24
    )) / 127.0;

    return sh2_0 * (1.0925484 * viewDir.x * viewDir.y)
      + sh2_1 * (-1.0925484 * viewDir.y * viewDir.z)
      + sh2_2 * (0.3153915 * (2.0 * viewDir.z * viewDir.z - viewDir.x * viewDir.x - viewDir.y * viewDir.y))
      + sh2_3 * (-1.0925484 * viewDir.x * viewDir.z)
      + sh2_4 * (0.5462742 * (viewDir.x * viewDir.x - viewDir.y * viewDir.y));
  }
`);
const defineEvaluateSH3 = unindent(`
  vec3 evaluateSH3(Gsplat gsplat, usampler2DArray sh3, vec3 viewDir) {
    // Extract sint6 values packed into 4 x uint32
    uvec4 packed = texelFetch(sh3, splatTexCoord(gsplat.index), 0);
    vec3 sh3_0 = vec3(ivec3(
      int(packed.x << 26u) >> 26,
      int(packed.x << 20u) >> 26,
      int(packed.x << 14u) >> 26
    )) / 31.0;
    vec3 sh3_1 = vec3(ivec3(
      int(packed.x << 8u) >> 26,
      int(packed.x << 2u) >> 26,
      int((packed.x >> 4u) | (packed.y << 28u)) >> 26
    )) / 31.0;
    vec3 sh3_2 = vec3(ivec3(
      int(packed.y << 22u) >> 26,
      int(packed.y << 16u) >> 26,
      int(packed.y << 10u) >> 26
    )) / 31.0;
    vec3 sh3_3 = vec3(ivec3(
      int(packed.y << 4u) >> 26,
      int((packed.y >> 2u) | (packed.z << 30u)) >> 26,
      int(packed.z << 24u) >> 26
    )) / 31.0;
    vec3 sh3_4 = vec3(ivec3(
      int(packed.z << 18u) >> 26,
      int(packed.z << 12u) >> 26,
      int(packed.z << 6u) >> 26
    )) / 31.0;
    vec3 sh3_5 = vec3(ivec3(
      int(packed.z) >> 26,
      int(packed.w << 26u) >> 26,
      int(packed.w << 20u) >> 26
    )) / 31.0;
    vec3 sh3_6 = vec3(ivec3(
      int(packed.w << 14u) >> 26,
      int(packed.w << 8u) >> 26,
      int(packed.w << 2u) >> 26
    )) / 31.0;

    float xx = viewDir.x * viewDir.x;
    float yy = viewDir.y * viewDir.y;
    float zz = viewDir.z * viewDir.z;
    float xy = viewDir.x * viewDir.y;
    float yz = viewDir.y * viewDir.z;
    float zx = viewDir.z * viewDir.x;

    return sh3_0 * (-0.5900436 * viewDir.y * (3.0 * xx - yy))
      + sh3_1 * (2.8906114 * xy * viewDir.z) +
      + sh3_2 * (-0.4570458 * viewDir.y * (4.0 * zz - xx - yy))
      + sh3_3 * (0.3731763 * viewDir.z * (2.0 * zz - 3.0 * xx - 3.0 * yy))
      + sh3_4 * (-0.4570458 * viewDir.x * (4.0 * zz - xx - yy))
      + sh3_5 * (1.4453057 * viewDir.z * (xx - yy))
      + sh3_6 * (-0.5900436 * viewDir.x * (xx - 3.0 * yy));
  }
`);
function evaluateSH1(gsplat, sh1, viewDir) {
  return dyno$1({
    inTypes: { gsplat: Gsplat, sh1: "usampler2DArray", viewDir: "vec3" },
    outTypes: { rgb: "vec3" },
    inputs: { gsplat, sh1, viewDir },
    globals: /* @__PURE__ */ __name(() => [defineGsplat, defineEvaluateSH1], "globals"),
    statements: /* @__PURE__ */ __name(({ inputs, outputs }) => {
      const statements = unindentLines(`
        if (isGsplatActive(${inputs.gsplat}.flags)) {
          ${outputs.rgb} = evaluateSH1(${inputs.gsplat}, ${inputs.sh1}, ${inputs.viewDir});
        } else {
          ${outputs.rgb} = vec3(0.0);
        }
      `);
      return statements;
    }, "statements")
  }).outputs.rgb;
}
__name(evaluateSH1, "evaluateSH1");
function evaluateSH2(gsplat, sh2, viewDir) {
  return dyno$1({
    inTypes: { gsplat: Gsplat, sh2: "usampler2DArray", viewDir: "vec3" },
    outTypes: { rgb: "vec3" },
    inputs: { gsplat, sh2, viewDir },
    globals: /* @__PURE__ */ __name(() => [defineGsplat, defineEvaluateSH2], "globals"),
    statements: /* @__PURE__ */ __name(({ inputs, outputs }) => unindentLines(`
        if (isGsplatActive(${inputs.gsplat}.flags)) {
          ${outputs.rgb} = evaluateSH2(${inputs.gsplat}, ${inputs.sh2}, ${inputs.viewDir});
        } else {
          ${outputs.rgb} = vec3(0.0);
        }
      `), "statements")
  }).outputs.rgb;
}
__name(evaluateSH2, "evaluateSH2");
function evaluateSH3(gsplat, sh3, viewDir) {
  return dyno$1({
    inTypes: { gsplat: Gsplat, sh3: "usampler2DArray", viewDir: "vec3" },
    outTypes: { rgb: "vec3" },
    inputs: { gsplat, sh3, viewDir },
    globals: /* @__PURE__ */ __name(() => [defineGsplat, defineEvaluateSH3], "globals"),
    statements: /* @__PURE__ */ __name(({ inputs, outputs }) => unindentLines(`
        if (isGsplatActive(${inputs.gsplat}.flags)) {
          ${outputs.rgb} = evaluateSH3(${inputs.gsplat}, ${inputs.sh3}, ${inputs.viewDir});
        } else {
          ${outputs.rgb} = vec3(0.0);
        }
      `), "statements")
  }).outputs.rgb;
}
__name(evaluateSH3, "evaluateSH3");
const EMPTY_GEOMETRY$1 = new BufferGeometry();
const EMPTY_MATERIAL = new ShaderMaterial();
function createRendererDetectionMesh() {
  const mesh = new Mesh(EMPTY_GEOMETRY$1, EMPTY_MATERIAL);
  mesh.frustumCulled = false;
  mesh.onBeforeRender = function(renderer, scene) {
    if (!scene.isScene) {
      this.removeFromParent();
      return;
    }
    let hasSparkRenderer = false;
    scene.traverse((c) => {
      if (c instanceof SparkRenderer) {
        hasSparkRenderer = true;
      }
    });
    if (!hasSparkRenderer) {
      scene.add(new SparkRenderer({ renderer }));
    }
    this.removeFromParent();
  };
  return mesh;
}
__name(createRendererDetectionMesh, "createRendererDetectionMesh");
const PLY_PROPERTY_TYPES = [
  "char",
  "uchar",
  "short",
  "ushort",
  "int",
  "uint",
  "float",
  "double"
];
const _PlyReader = class _PlyReader2 {
  static {
    __name(this, "_PlyReader");
  }
  // Create a PlyReader from a Uint8Array/ArrayBuffer, no parsing done yet
  constructor({ fileBytes }) {
    this.header = "";
    this.littleEndian = true;
    this.elements = {};
    this.comments = [];
    this.data = null;
    this.numSplats = 0;
    this.fileBytes = fileBytes instanceof ArrayBuffer ? new Uint8Array(fileBytes) : fileBytes;
  }
  // Identify and parse the PLY text header (assumed to be <64KB in size).
  // this.elements will contain all the elements in the file, typically
  // "vertex" contains the Gsplat data.
  async parseHeader() {
    const bufferStream = new ReadableStream({
      start: /* @__PURE__ */ __name((controller) => {
        controller.enqueue(this.fileBytes.slice(0, 65536));
        controller.close();
      }, "start")
    });
    const decoder = bufferStream.pipeThrough(new TextDecoderStream()).getReader();
    this.header = "";
    const headerTerminator = "end_header\n";
    while (true) {
      const { value, done } = await decoder.read();
      if (done) {
        throw new Error("Failed to read header");
      }
      this.header += value;
      const endHeader = this.header.indexOf(headerTerminator);
      if (endHeader >= 0) {
        this.header = this.header.slice(0, endHeader + headerTerminator.length);
        break;
      }
    }
    const headerLen = new TextEncoder().encode(this.header).length;
    this.data = new DataView(this.fileBytes.buffer, headerLen);
    this.elements = {};
    let curElement = null;
    this.comments = [];
    this.header.trim().split("\n").forEach((line, lineIndex) => {
      const trimmedLine = line.trim();
      if (lineIndex === 0) {
        if (trimmedLine !== "ply") {
          throw new Error("Invalid PLY header");
        }
        return;
      }
      if (trimmedLine.length === 0) {
        return;
      }
      const fields = trimmedLine.split(" ");
      switch (fields[0]) {
        case "format":
          if (fields[1] === "binary_little_endian") {
            this.littleEndian = true;
          } else if (fields[1] === "binary_big_endian") {
            this.littleEndian = false;
          } else {
            throw new Error(`Unsupported PLY format: ${fields[1]}`);
          }
          if (fields[2] !== "1.0") {
            throw new Error(`Unsupported PLY version: ${fields[2]}`);
          }
          break;
        case "end_header":
          break;
        case "comment":
          this.comments.push(trimmedLine.slice("comment ".length));
          break;
        case "element": {
          const name = fields[1];
          curElement = {
            name,
            count: Number.parseInt(fields[2]),
            properties: {}
          };
          this.elements[name] = curElement;
          break;
        }
        case "property":
          if (curElement == null) {
            throw new Error("Property must be inside an element");
          }
          if (fields[1] === "list") {
            curElement.properties[fields[4]] = {
              isList: true,
              type: fields[3],
              countType: fields[2]
            };
          } else {
            curElement.properties[fields[2]] = {
              isList: false,
              type: fields[1]
            };
          }
          break;
      }
    });
    if (this.elements.vertex) {
      this.numSplats = this.elements.vertex.count;
    }
  }
  parseData(elementCallback) {
    let offset = 0;
    const data = this.data;
    if (data == null) {
      throw new Error("No data to parse");
    }
    for (const elementName in this.elements) {
      const element = this.elements[elementName];
      const { count, properties } = element;
      const item = createEmptyItem(properties);
      const parseFn = createParseFn(properties, this.littleEndian);
      const callback = elementCallback(element) ?? (() => {
      });
      for (let index = 0; index < count; index++) {
        offset = parseFn(data, offset, item);
        callback(index, item);
      }
    }
  }
  // Parse all the Gsplat data in the PLY file in go, invoking the given
  // callbacks for each Gsplat.
  parseSplats(splatCallback, shCallback) {
    if (this.elements.vertex == null) {
      throw new Error("No vertex element found");
    }
    let isSuperSplat = false;
    const ssChunks = [];
    let numSh = 0;
    let sh1Props = [];
    let sh2Props = [];
    let sh3Props = [];
    let sh1 = void 0;
    let sh2 = void 0;
    let sh3 = void 0;
    function prepareSh() {
      const num_f_rest = NUM_SH_TO_NUM_F_REST[numSh];
      sh1Props = new Array(3).fill(null).flatMap((_, k) => [0, 1, 2].map((_2, d) => k + d * num_f_rest / 3));
      sh2Props = new Array(5).fill(null).flatMap(
        (_, k) => [0, 1, 2].map((_2, d) => 3 + k + d * num_f_rest / 3)
      );
      sh3Props = new Array(7).fill(null).flatMap(
        (_, k) => [0, 1, 2].map((_2, d) => 8 + k + d * num_f_rest / 3)
      );
      sh1 = numSh >= 1 ? new Float32Array(3 * 3) : void 0;
      sh2 = numSh >= 2 ? new Float32Array(5 * 3) : void 0;
      sh3 = numSh >= 3 ? new Float32Array(7 * 3) : void 0;
    }
    __name(prepareSh, "prepareSh");
    function ssShCallback(index, item) {
      if (!sh1) {
        throw new Error("Missing sh1");
      }
      const sh = item.f_rest;
      for (let i = 0; i < sh1Props.length; i++) {
        sh1[i] = sh[sh1Props[i]] * 8 / 255 - 4;
      }
      if (sh2) {
        for (let i = 0; i < sh2Props.length; i++) {
          sh2[i] = sh[sh2Props[i]] * 8 / 255 - 4;
        }
      }
      if (sh3) {
        for (let i = 0; i < sh3Props.length; i++) {
          sh3[i] = sh[sh3Props[i]] * 8 / 255 - 4;
        }
      }
      shCallback == null ? void 0 : shCallback(index, sh1, sh2, sh3);
    }
    __name(ssShCallback, "ssShCallback");
    function initSuperSplat(element) {
      const {
        min_x,
        min_y,
        min_z,
        max_x,
        max_y,
        max_z,
        min_scale_x,
        min_scale_y,
        min_scale_z,
        max_scale_x,
        max_scale_y,
        max_scale_z
      } = element.properties;
      if (!min_x || !min_y || !min_z || !max_x || !max_y || !max_z || !min_scale_x || !min_scale_y || !min_scale_z || !max_scale_x || !max_scale_y || !max_scale_z) {
        throw new Error("Missing PLY chunk properties");
      }
      isSuperSplat = true;
      return (index, item) => {
        const {
          min_x: min_x2,
          min_y: min_y2,
          min_z: min_z2,
          max_x: max_x2,
          max_y: max_y2,
          max_z: max_z2,
          min_scale_x: min_scale_x2,
          min_scale_y: min_scale_y2,
          min_scale_z: min_scale_z2,
          max_scale_x: max_scale_x2,
          max_scale_y: max_scale_y2,
          max_scale_z: max_scale_z2,
          min_r,
          min_g,
          min_b,
          max_r,
          max_g,
          max_b
        } = item;
        ssChunks.push({
          min_x: min_x2,
          min_y: min_y2,
          min_z: min_z2,
          max_x: max_x2,
          max_y: max_y2,
          max_z: max_z2,
          min_scale_x: min_scale_x2,
          min_scale_y: min_scale_y2,
          min_scale_z: min_scale_z2,
          max_scale_x: max_scale_x2,
          max_scale_y: max_scale_y2,
          max_scale_z: max_scale_z2,
          min_r,
          min_g,
          min_b,
          max_r,
          max_g,
          max_b
        });
      };
    }
    __name(initSuperSplat, "initSuperSplat");
    function decodeSuperSplat(element) {
      if (shCallback && element.name === "sh") {
        numSh = getNumSh(element.properties);
        prepareSh();
        return ssShCallback;
      }
      if (element.name !== "vertex") {
        return null;
      }
      const { packed_position, packed_rotation, packed_scale, packed_color } = element.properties;
      if (!packed_position || !packed_rotation || !packed_scale || !packed_color) {
        throw new Error(
          "Missing PLY properties: packed_position, packed_rotation, packed_scale, packed_color"
        );
      }
      const SQRT2 = Math.sqrt(2);
      return (index, item) => {
        const chunk = ssChunks[index >>> 8];
        if (chunk == null) {
          throw new Error("Missing PLY chunk");
        }
        const {
          min_x,
          min_y,
          min_z,
          max_x,
          max_y,
          max_z,
          min_scale_x,
          min_scale_y,
          min_scale_z,
          max_scale_x,
          max_scale_y,
          max_scale_z,
          min_r,
          min_g,
          min_b,
          max_r,
          max_g,
          max_b
        } = chunk;
        const { packed_position: packed_position2, packed_rotation: packed_rotation2, packed_scale: packed_scale2, packed_color: packed_color2 } = item;
        const x = (packed_position2 >>> 21 & 2047) / 2047 * (max_x - min_x) + min_x;
        const y = (packed_position2 >>> 11 & 1023) / 1023 * (max_y - min_y) + min_y;
        const z = (packed_position2 & 2047) / 2047 * (max_z - min_z) + min_z;
        const r0 = ((packed_rotation2 >>> 20 & 1023) / 1023 - 0.5) * SQRT2;
        const r1 = ((packed_rotation2 >>> 10 & 1023) / 1023 - 0.5) * SQRT2;
        const r2 = ((packed_rotation2 & 1023) / 1023 - 0.5) * SQRT2;
        const rr = Math.sqrt(Math.max(0, 1 - r0 * r0 - r1 * r1 - r2 * r2));
        const rOrder = packed_rotation2 >>> 30;
        const quatX = rOrder === 0 ? r0 : rOrder === 1 ? rr : r1;
        const quatY = rOrder <= 1 ? r1 : rOrder === 2 ? rr : r2;
        const quatZ = rOrder <= 2 ? r2 : rr;
        const quatW = rOrder === 0 ? rr : r0;
        const scaleX = Math.exp(
          (packed_scale2 >>> 21 & 2047) / 2047 * (max_scale_x - min_scale_x) + min_scale_x
        );
        const scaleY = Math.exp(
          (packed_scale2 >>> 11 & 1023) / 1023 * (max_scale_y - min_scale_y) + min_scale_y
        );
        const scaleZ = Math.exp(
          (packed_scale2 & 2047) / 2047 * (max_scale_z - min_scale_z) + min_scale_z
        );
        const r = (packed_color2 >>> 24 & 255) / 255 * ((max_r ?? 1) - (min_r ?? 0)) + (min_r ?? 0);
        const g = (packed_color2 >>> 16 & 255) / 255 * ((max_g ?? 1) - (min_g ?? 0)) + (min_g ?? 0);
        const b = (packed_color2 >>> 8 & 255) / 255 * ((max_b ?? 1) - (min_b ?? 0)) + (min_b ?? 0);
        const opacity = (packed_color2 & 255) / 255;
        splatCallback(
          index,
          x,
          y,
          z,
          scaleX,
          scaleY,
          scaleZ,
          quatX,
          quatY,
          quatZ,
          quatW,
          opacity,
          r,
          g,
          b
        );
      };
    }
    __name(decodeSuperSplat, "decodeSuperSplat");
    const elementCallback = /* @__PURE__ */ __name((element) => {
      if (element.name === "chunk") {
        return initSuperSplat(element);
      }
      if (isSuperSplat) {
        return decodeSuperSplat(element);
      }
      if (element.name !== "vertex") {
        return null;
      }
      const {
        x,
        y,
        z,
        scale_0,
        scale_1,
        scale_2,
        rot_0,
        rot_1,
        rot_2,
        rot_3,
        opacity,
        f_dc_0,
        f_dc_1,
        f_dc_2,
        red,
        green,
        blue,
        alpha
      } = element.properties;
      if (!x || !y || !z) {
        throw new Error("Missing PLY properties: x, y, z");
      }
      const hasScales = scale_0 && scale_1 && scale_2;
      const hasRots = rot_0 && rot_1 && rot_2 && rot_3;
      const alphaDiv = alpha != null ? FIELD_SCALE[alpha.type] : 1;
      const redDiv = red != null ? FIELD_SCALE[red.type] : 1;
      const greenDiv = green != null ? FIELD_SCALE[green.type] : 1;
      const blueDiv = blue != null ? FIELD_SCALE[blue.type] : 1;
      numSh = getNumSh(element.properties);
      prepareSh();
      return (index, item) => {
        const scaleX = hasScales ? Math.exp(item.scale_0) : _PlyReader2.defaultPointScale;
        const scaleY = hasScales ? Math.exp(item.scale_1) : _PlyReader2.defaultPointScale;
        const scaleZ = hasScales ? Math.exp(item.scale_2) : _PlyReader2.defaultPointScale;
        const quatX = hasRots ? item.rot_1 : 0;
        const quatY = hasRots ? item.rot_2 : 0;
        const quatZ = hasRots ? item.rot_3 : 0;
        const quatW = hasRots ? item.rot_0 : 1;
        const op = opacity != null ? 1 / (1 + Math.exp(-item.opacity)) : alpha != null ? item.alpha / alphaDiv : 1;
        const r = f_dc_0 != null ? item.f_dc_0 * SH_C0$1 + 0.5 : red != null ? item.red / redDiv : 1;
        const g = f_dc_1 != null ? item.f_dc_1 * SH_C0$1 + 0.5 : green != null ? item.green / greenDiv : 1;
        const b = f_dc_2 != null ? item.f_dc_2 * SH_C0$1 + 0.5 : blue != null ? item.blue / blueDiv : 1;
        splatCallback(
          index,
          item.x,
          item.y,
          item.z,
          scaleX,
          scaleY,
          scaleZ,
          quatX,
          quatY,
          quatZ,
          quatW,
          op,
          r,
          g,
          b
        );
        if (shCallback && sh1) {
          const sh = item.f_rest;
          if (sh1) {
            for (let i = 0; i < sh1Props.length; i++) {
              sh1[i] = sh[sh1Props[i]];
            }
          }
          if (sh2) {
            for (let i = 0; i < sh2Props.length; i++) {
              sh2[i] = sh[sh2Props[i]];
            }
          }
          if (sh3) {
            for (let i = 0; i < sh3Props.length; i++) {
              sh3[i] = sh[sh3Props[i]];
            }
          }
          shCallback(index, sh1, sh2, sh3);
        }
      };
    }, "elementCallback");
    this.parseData(elementCallback);
  }
  // Inject RGBA values into original PLY file, which can be used to modify
  // the color/opacity of the Gsplats and write out the modified PLY file.
  injectRgba(rgba) {
    let offset = 0;
    const data = this.data;
    if (data == null) {
      throw new Error("No parsed data");
    }
    if (rgba.length !== this.numSplats * 4) {
      throw new Error("Invalid RGBA array length");
    }
    for (const elementName in this.elements) {
      const element = this.elements[elementName];
      const { count, properties } = element;
      const parsers = [];
      let rgbaOffset = 0;
      const isVertex = elementName === "vertex";
      if (isVertex) {
        for (const name of ["opacity", "f_dc_0", "f_dc_1", "f_dc_2"]) {
          if (!properties[name] || properties[name].type !== "float") {
            throw new Error(`Can't injectRgba due to property: ${name}`);
          }
        }
      }
      for (const [propertyName, property] of Object.entries(properties)) {
        if (!property.isList) {
          if (isVertex) {
            if (propertyName === "f_dc_0" || propertyName === "f_dc_1" || propertyName === "f_dc_2") {
              const component = Number.parseInt(
                propertyName.slice("f_dc_".length)
              );
              parsers.push(() => {
                const value = (rgba[rgbaOffset + component] / 255 - 0.5) / SH_C0$1;
                SET_FIELD[property.type](
                  data,
                  offset,
                  this.littleEndian,
                  value
                );
              });
            } else if (propertyName === "opacity") {
              parsers.push(() => {
                const value = Math.max(
                  -100,
                  Math.min(
                    100,
                    -Math.log(1 / (rgba[rgbaOffset + 3] / 255) - 1)
                  )
                );
                SET_FIELD[property.type](
                  data,
                  offset,
                  this.littleEndian,
                  value
                );
              });
            }
          }
          parsers.push(() => {
            offset += FIELD_BYTES[property.type];
          });
        } else {
          parsers.push(() => {
            const length2 = PARSE_FIELD[property.countType](
              data,
              offset,
              this.littleEndian
            );
            offset += FIELD_BYTES[property.countType];
            offset += length2 * FIELD_BYTES[property.type];
          });
        }
      }
      for (let index = 0; index < count; index++) {
        for (const parser of parsers) {
          parser();
        }
        if (isVertex) {
          rgbaOffset += 4;
        }
      }
    }
  }
};
_PlyReader.defaultPointScale = 1e-3;
let PlyReader = _PlyReader;
const SH_C0$1 = 0.28209479177387814;
const PARSE_FIELD = {
  char: /* @__PURE__ */ __name((data, offset, littleEndian) => {
    return data.getInt8(offset);
  }, "char"),
  uchar: /* @__PURE__ */ __name((data, offset, littleEndian) => {
    return data.getUint8(offset);
  }, "uchar"),
  short: /* @__PURE__ */ __name((data, offset, littleEndian) => {
    return data.getInt16(offset, littleEndian);
  }, "short"),
  ushort: /* @__PURE__ */ __name((data, offset, littleEndian) => {
    return data.getUint16(offset, littleEndian);
  }, "ushort"),
  int: /* @__PURE__ */ __name((data, offset, littleEndian) => {
    return data.getInt32(offset, littleEndian);
  }, "int"),
  uint: /* @__PURE__ */ __name((data, offset, littleEndian) => {
    return data.getUint32(offset, littleEndian);
  }, "uint"),
  float: /* @__PURE__ */ __name((data, offset, littleEndian) => {
    return data.getFloat32(offset, littleEndian);
  }, "float"),
  double: /* @__PURE__ */ __name((data, offset, littleEndian) => {
    return data.getFloat64(offset, littleEndian);
  }, "double")
};
const SET_FIELD = {
  char: /* @__PURE__ */ __name((data, offset, littleEndian, value) => {
    data.setInt8(offset, value);
  }, "char"),
  uchar: /* @__PURE__ */ __name((data, offset, littleEndian, value) => {
    data.setUint8(offset, value);
  }, "uchar"),
  short: /* @__PURE__ */ __name((data, offset, littleEndian, value) => {
    data.setInt16(offset, value, littleEndian);
  }, "short"),
  ushort: /* @__PURE__ */ __name((data, offset, littleEndian, value) => {
    data.setUint16(offset, value, littleEndian);
  }, "ushort"),
  int: /* @__PURE__ */ __name((data, offset, littleEndian, value) => {
    data.setInt32(offset, value, littleEndian);
  }, "int"),
  uint: /* @__PURE__ */ __name((data, offset, littleEndian, value) => {
    data.setUint32(offset, value, littleEndian);
  }, "uint"),
  float: /* @__PURE__ */ __name((data, offset, littleEndian, value) => {
    data.setFloat32(offset, value, littleEndian);
  }, "float"),
  double: /* @__PURE__ */ __name((data, offset, littleEndian, value) => {
    data.setFloat64(offset, value, littleEndian);
  }, "double")
};
const FIELD_BYTES = {
  char: 1,
  uchar: 1,
  short: 2,
  ushort: 2,
  int: 4,
  uint: 4,
  float: 4,
  double: 8
};
const FIELD_SCALE = {
  char: 127,
  uchar: 255,
  short: 32767,
  ushort: 65535,
  int: 2147483647,
  uint: 4294967295,
  float: 1,
  double: 1
};
const NUM_F_REST_TO_NUM_SH = {
  0: 0,
  9: 1,
  24: 2,
  45: 3
};
const NUM_SH_TO_NUM_F_REST = {
  0: 0,
  1: 9,
  2: 24,
  3: 45
};
const F_REST_REGEX = /^f_rest_([0-9]{1,2})$/;
function createEmptyItem(properties) {
  const item = {};
  for (const [propertyName, property] of Object.entries(properties)) {
    if (F_REST_REGEX.test(propertyName)) {
      item.f_rest = new Array(getNumSh(properties));
    } else {
      item[propertyName] = property.isList ? [] : 0;
    }
  }
  return item;
}
__name(createEmptyItem, "createEmptyItem");
function createParseFn(properties, littleEndian) {
  if (safeToCompile(properties)) {
    return createCompiledParserFn(properties, littleEndian);
  }
  return createDynamicParserFn(properties, littleEndian);
}
__name(createParseFn, "createParseFn");
const UNSAFE_EVAL_ALLOWED = (() => {
  try {
    new Function("return 42;");
  } catch (e) {
    return false;
  }
  return true;
})();
const PROPERTY_NAME_REGEX = /^[a-zA-Z0-9_]+$/;
function safeToCompile(properties) {
  if (!UNSAFE_EVAL_ALLOWED) {
    return false;
  }
  for (const [propertyName, property] of Object.entries(properties)) {
    if (!PROPERTY_NAME_REGEX.test(propertyName)) {
      return false;
    }
    if (property.isList && !PLY_PROPERTY_TYPES.includes(property.countType)) {
      return false;
    }
    if (!PLY_PROPERTY_TYPES.includes(property.type)) {
      return false;
    }
  }
  return true;
}
__name(safeToCompile, "safeToCompile");
function createCompiledParserFn(properties, littleEndian) {
  const parserSrc = ["let list;"];
  for (const [propertyName, property] of Object.entries(properties)) {
    const fRestMatch = propertyName.match(F_REST_REGEX);
    if (fRestMatch) {
      const fRestIndex = +fRestMatch[1];
      parserSrc.push(
        /*js*/
        `
        item.f_rest[${fRestIndex}] = PARSE_FIELD['${property.type}'](data, offset, ${littleEndian});
        offset += ${FIELD_BYTES[property.type]};
      `
      );
    } else if (!property.isList) {
      parserSrc.push(
        /*js*/
        `
        item['${propertyName}'] = PARSE_FIELD['${property.type}'](data, offset, ${littleEndian});
        offset += ${FIELD_BYTES[property.type]};
      `
      );
    } else {
      parserSrc.push(
        /*js*/
        `
        list = item['${propertyName}'];
        list.length = PARSE_FIELD['${property.countType}'](data, offset, ${littleEndian});
        offset += ${FIELD_BYTES[property.countType]};
        for (let i = 0; i < list.length; i++) {
          list[i] = PARSE_FIELD['${property.type}'](data, offset, ${littleEndian});
          offset += ${FIELD_BYTES[property.type]};
        }
      `
      );
    }
  }
  parserSrc.push("return offset;");
  const fn = new Function(
    "data",
    "offset",
    "item",
    "PARSE_FIELD",
    parserSrc.join("\n")
  );
  return (data, offset, item) => fn(data, offset, item, PARSE_FIELD);
}
__name(createCompiledParserFn, "createCompiledParserFn");
function createDynamicParserFn(properties, littleEndian) {
  const parsers = [];
  for (const [propertyName, property] of Object.entries(properties)) {
    const fRestMatch = propertyName.match(F_REST_REGEX);
    if (fRestMatch) {
      const fRestIndex = +fRestMatch[1];
      parsers.push(
        (data, offset, item) => {
          item.f_rest[fRestIndex] = PARSE_FIELD[property.type](
            data,
            offset,
            littleEndian
          );
          return offset + FIELD_BYTES[property.type];
        }
      );
    } else if (!property.isList) {
      parsers.push(
        (data, offset, item) => {
          item[propertyName] = PARSE_FIELD[property.type](
            data,
            offset,
            littleEndian
          );
          return offset + FIELD_BYTES[property.type];
        }
      );
    } else {
      parsers.push(
        (data, offset, item) => {
          const list = item[propertyName];
          list.length = PARSE_FIELD[property.countType](
            data,
            offset,
            littleEndian
          );
          let currentOffset = offset + FIELD_BYTES[property.countType];
          for (let i = 0; i < list.length; i++) {
            list[i] = PARSE_FIELD[property.type](
              data,
              currentOffset,
              littleEndian
            );
            currentOffset += FIELD_BYTES[property.type];
          }
          return currentOffset;
        }
      );
    }
  }
  return (data, offset, item) => {
    let currentOffset = offset;
    for (let parserIndex = 0; parserIndex < parsers.length; parserIndex++) {
      currentOffset = parsers[parserIndex](data, currentOffset, item);
    }
    return currentOffset;
  };
}
__name(createDynamicParserFn, "createDynamicParserFn");
function getNumSh(properties) {
  let num_f_rest = 0;
  while (properties[`f_rest_${num_f_rest}`]) {
    num_f_rest += 1;
  }
  const numSh = NUM_F_REST_TO_NUM_SH[num_f_rest];
  if (numSh == null) {
    throw new Error(`Unsupported number of SH coefficients: ${num_f_rest}`);
  }
  return numSh;
}
__name(getNumSh, "getNumSh");
const jsContent = '(function() {\n  "use strict";\n  let wasm;\n  const cachedTextDecoder = typeof TextDecoder !== "undefined" ? new TextDecoder("utf-8", { ignoreBOM: true, fatal: true }) : { decode: () => {\n    throw Error("TextDecoder not available");\n  } };\n  if (typeof TextDecoder !== "undefined") {\n    cachedTextDecoder.decode();\n  }\n  let cachedUint8ArrayMemory0 = null;\n  function getUint8ArrayMemory0() {\n    if (cachedUint8ArrayMemory0 === null || cachedUint8ArrayMemory0.byteLength === 0) {\n      cachedUint8ArrayMemory0 = new Uint8Array(wasm.memory.buffer);\n    }\n    return cachedUint8ArrayMemory0;\n  }\n  function getStringFromWasm0(ptr, len) {\n    ptr = ptr >>> 0;\n    return cachedTextDecoder.decode(getUint8ArrayMemory0().subarray(ptr, ptr + len));\n  }\n  function sort_splats(num_splats, readback, ordering) {\n    const ret = wasm.sort_splats(num_splats, readback, ordering);\n    return ret >>> 0;\n  }\n  function sort32_splats(num_splats, readback, ordering) {\n    const ret = wasm.sort32_splats(num_splats, readback, ordering);\n    return ret >>> 0;\n  }\n  async function __wbg_load(module, imports) {\n    if (typeof Response === "function" && module instanceof Response) {\n      if (typeof WebAssembly.instantiateStreaming === "function") {\n        try {\n          return await WebAssembly.instantiateStreaming(module, imports);\n        } catch (e) {\n          if (module.headers.get("Content-Type") != "application/wasm") {\n            console.warn("`WebAssembly.instantiateStreaming` failed because your server does not serve Wasm with `application/wasm` MIME type. Falling back to `WebAssembly.instantiate` which is slower. Original error:\\n", e);\n          } else {\n            throw e;\n          }\n        }\n      }\n      const bytes = await module.arrayBuffer();\n      return await WebAssembly.instantiate(bytes, imports);\n    } else {\n      const instance = await WebAssembly.instantiate(module, imports);\n      if (instance instanceof WebAssembly.Instance) {\n        return { instance, module };\n      } else {\n        return instance;\n      }\n    }\n  }\n  function __wbg_get_imports() {\n    const imports = {};\n    imports.wbg = {};\n    imports.wbg.__wbg_buffer_609cc3eee51ed158 = function(arg0) {\n      const ret = arg0.buffer;\n      return ret;\n    };\n    imports.wbg.__wbg_length_3b4f022188ae8db6 = function(arg0) {\n      const ret = arg0.length;\n      return ret;\n    };\n    imports.wbg.__wbg_length_6ca527665d89694d = function(arg0) {\n      const ret = arg0.length;\n      return ret;\n    };\n    imports.wbg.__wbg_length_8cfd2c6409af88ad = function(arg0) {\n      const ret = arg0.length;\n      return ret;\n    };\n    imports.wbg.__wbg_new_9fee97a409b32b68 = function(arg0) {\n      const ret = new Uint16Array(arg0);\n      return ret;\n    };\n    imports.wbg.__wbg_new_e3b321dcfef89fc7 = function(arg0) {\n      const ret = new Uint32Array(arg0);\n      return ret;\n    };\n    imports.wbg.__wbg_newwithbyteoffsetandlength_e6b7e69acd4c7354 = function(arg0, arg1, arg2) {\n      const ret = new Float32Array(arg0, arg1 >>> 0, arg2 >>> 0);\n      return ret;\n    };\n    imports.wbg.__wbg_newwithbyteoffsetandlength_f1dead44d1fc7212 = function(arg0, arg1, arg2) {\n      const ret = new Uint32Array(arg0, arg1 >>> 0, arg2 >>> 0);\n      return ret;\n    };\n    imports.wbg.__wbg_newwithlength_5a5efe313cfd59f1 = function(arg0) {\n      const ret = new Float32Array(arg0 >>> 0);\n      return ret;\n    };\n    imports.wbg.__wbg_set_10bad9bee0e9c58b = function(arg0, arg1, arg2) {\n      arg0.set(arg1, arg2 >>> 0);\n    };\n    imports.wbg.__wbg_set_d23661d19148b229 = function(arg0, arg1, arg2) {\n      arg0.set(arg1, arg2 >>> 0);\n    };\n    imports.wbg.__wbg_set_f4f1f0daa30696fc = function(arg0, arg1, arg2) {\n      arg0.set(arg1, arg2 >>> 0);\n    };\n    imports.wbg.__wbg_subarray_3aaeec89bb2544f0 = function(arg0, arg1, arg2) {\n      const ret = arg0.subarray(arg1 >>> 0, arg2 >>> 0);\n      return ret;\n    };\n    imports.wbg.__wbg_subarray_769e1e0f81bb259b = function(arg0, arg1, arg2) {\n      const ret = arg0.subarray(arg1 >>> 0, arg2 >>> 0);\n      return ret;\n    };\n    imports.wbg.__wbindgen_init_externref_table = function() {\n      const table = wasm.__wbindgen_export_0;\n      const offset = table.grow(4);\n      table.set(0, void 0);\n      table.set(offset + 0, void 0);\n      table.set(offset + 1, null);\n      table.set(offset + 2, true);\n      table.set(offset + 3, false);\n    };\n    imports.wbg.__wbindgen_memory = function() {\n      const ret = wasm.memory;\n      return ret;\n    };\n    imports.wbg.__wbindgen_throw = function(arg0, arg1) {\n      throw new Error(getStringFromWasm0(arg0, arg1));\n    };\n    return imports;\n  }\n  function __wbg_finalize_init(instance, module) {\n    wasm = instance.exports;\n    __wbg_init.__wbindgen_wasm_module = module;\n    cachedUint8ArrayMemory0 = null;\n    wasm.__wbindgen_start();\n    return wasm;\n  }\n  async function __wbg_init(module_or_path) {\n    if (wasm !== void 0) return wasm;\n    if (typeof module_or_path !== "undefined") {\n      if (Object.getPrototypeOf(module_or_path) === Object.prototype) {\n        ({ module_or_path } = module_or_path);\n      } else {\n        console.warn("using deprecated parameters for the initialization function; pass a single object instead");\n      }\n    }\n    if (typeof module_or_path === "undefined") {\n      module_or_path = new URL("data:application/wasm;base64, ", self.location.href);\n    }\n    const imports = __wbg_get_imports();\n    if (typeof module_or_path === "string" || typeof Request === "function" && module_or_path instanceof Request || typeof URL === "function" && module_or_path instanceof URL) {\n      module_or_path = fetch(module_or_path);\n    }\n    const { instance, module } = await __wbg_load(await module_or_path, imports);\n    return __wbg_finalize_init(instance, module);\n  }\n  var ch2 = {};\n  var wk = function(c, id, msg, transfer, cb) {\n    var w = new Worker(ch2[id] || (ch2[id] = URL.createObjectURL(new Blob([\n      c + \';addEventListener("error",function(e){e=e.error;postMessage({$e$:[e.message,e.code,e.stack]})})\'\n    ], { type: "text/javascript" }))));\n    w.onmessage = function(e) {\n      var d = e.data, ed = d.$e$;\n      if (ed) {\n        var err2 = new Error(ed[0]);\n        err2["code"] = ed[1];\n        err2.stack = ed[2];\n        cb(err2, null);\n      } else\n        cb(null, d);\n    };\n    w.postMessage(msg, transfer);\n    return w;\n  };\n  var u8 = Uint8Array, u16 = Uint16Array, i32 = Int32Array;\n  var fleb = new u8([\n    0,\n    0,\n    0,\n    0,\n    0,\n    0,\n    0,\n    0,\n    1,\n    1,\n    1,\n    1,\n    2,\n    2,\n    2,\n    2,\n    3,\n    3,\n    3,\n    3,\n    4,\n    4,\n    4,\n    4,\n    5,\n    5,\n    5,\n    5,\n    0,\n    /* unused */\n    0,\n    0,\n    /* impossible */\n    0\n  ]);\n  var fdeb = new u8([\n    0,\n    0,\n    0,\n    0,\n    1,\n    1,\n    2,\n    2,\n    3,\n    3,\n    4,\n    4,\n    5,\n    5,\n    6,\n    6,\n    7,\n    7,\n    8,\n    8,\n    9,\n    9,\n    10,\n    10,\n    11,\n    11,\n    12,\n    12,\n    13,\n    13,\n    /* unused */\n    0,\n    0\n  ]);\n  var clim = new u8([16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15]);\n  var freb = function(eb, start) {\n    var b = new u16(31);\n    for (var i2 = 0; i2 < 31; ++i2) {\n      b[i2] = start += 1 << eb[i2 - 1];\n    }\n    var r = new i32(b[30]);\n    for (var i2 = 1; i2 < 30; ++i2) {\n      for (var j = b[i2]; j < b[i2 + 1]; ++j) {\n        r[j] = j - b[i2] << 5 | i2;\n      }\n    }\n    return { b, r };\n  };\n  var _a = freb(fleb, 2), fl = _a.b, revfl = _a.r;\n  fl[28] = 258, revfl[258] = 28;\n  var _b = freb(fdeb, 0), fd = _b.b;\n  var rev = new u16(32768);\n  for (var i = 0; i < 32768; ++i) {\n    var x = (i & 43690) >> 1 | (i & 21845) << 1;\n    x = (x & 52428) >> 2 | (x & 13107) << 2;\n    x = (x & 61680) >> 4 | (x & 3855) << 4;\n    rev[i] = ((x & 65280) >> 8 | (x & 255) << 8) >> 1;\n  }\n  var hMap = function(cd, mb, r) {\n    var s = cd.length;\n    var i2 = 0;\n    var l = new u16(mb);\n    for (; i2 < s; ++i2) {\n      if (cd[i2])\n        ++l[cd[i2] - 1];\n    }\n    var le = new u16(mb);\n    for (i2 = 1; i2 < mb; ++i2) {\n      le[i2] = le[i2 - 1] + l[i2 - 1] << 1;\n    }\n    var co;\n    if (r) {\n      co = new u16(1 << mb);\n      var rvb = 15 - mb;\n      for (i2 = 0; i2 < s; ++i2) {\n        if (cd[i2]) {\n          var sv = i2 << 4 | cd[i2];\n          var r_1 = mb - cd[i2];\n          var v = le[cd[i2] - 1]++ << r_1;\n          for (var m = v | (1 << r_1) - 1; v <= m; ++v) {\n            co[rev[v] >> rvb] = sv;\n          }\n        }\n      }\n    } else {\n      co = new u16(s);\n      for (i2 = 0; i2 < s; ++i2) {\n        if (cd[i2]) {\n          co[i2] = rev[le[cd[i2] - 1]++] >> 15 - cd[i2];\n        }\n      }\n    }\n    return co;\n  };\n  var flt = new u8(288);\n  for (var i = 0; i < 144; ++i)\n    flt[i] = 8;\n  for (var i = 144; i < 256; ++i)\n    flt[i] = 9;\n  for (var i = 256; i < 280; ++i)\n    flt[i] = 7;\n  for (var i = 280; i < 288; ++i)\n    flt[i] = 8;\n  var fdt = new u8(32);\n  for (var i = 0; i < 32; ++i)\n    fdt[i] = 5;\n  var flrm = /* @__PURE__ */ hMap(flt, 9, 1);\n  var fdrm = /* @__PURE__ */ hMap(fdt, 5, 1);\n  var max = function(a) {\n    var m = a[0];\n    for (var i2 = 1; i2 < a.length; ++i2) {\n      if (a[i2] > m)\n        m = a[i2];\n    }\n    return m;\n  };\n  var bits = function(d, p, m) {\n    var o = p / 8 | 0;\n    return (d[o] | d[o + 1] << 8) >> (p & 7) & m;\n  };\n  var bits16 = function(d, p) {\n    var o = p / 8 | 0;\n    return (d[o] | d[o + 1] << 8 | d[o + 2] << 16) >> (p & 7);\n  };\n  var shft = function(p) {\n    return (p + 7) / 8 | 0;\n  };\n  var slc = function(v, s, e) {\n    if (s == null || s < 0)\n      s = 0;\n    if (e == null || e > v.length)\n      e = v.length;\n    return new u8(v.subarray(s, e));\n  };\n  var ec = [\n    "unexpected EOF",\n    "invalid block type",\n    "invalid length/literal",\n    "invalid distance",\n    "stream finished",\n    "no stream handler",\n    ,\n    "no callback",\n    "invalid UTF-8 data",\n    "extra field too long",\n    "date not in range 1980-2099",\n    "filename too long",\n    "stream finishing",\n    "invalid zip data"\n    // determined by unknown compression method\n  ];\n  var err = function(ind, msg, nt) {\n    var e = new Error(msg || ec[ind]);\n    e.code = ind;\n    if (Error.captureStackTrace)\n      Error.captureStackTrace(e, err);\n    if (!nt)\n      throw e;\n    return e;\n  };\n  var inflt = function(dat, st, buf, dict) {\n    var sl = dat.length, dl = dict ? dict.length : 0;\n    if (!sl || st.f && !st.l)\n      return buf || new u8(0);\n    var noBuf = !buf;\n    var resize = noBuf || st.i != 2;\n    var noSt = st.i;\n    if (noBuf)\n      buf = new u8(sl * 3);\n    var cbuf = function(l2) {\n      var bl = buf.length;\n      if (l2 > bl) {\n        var nbuf = new u8(Math.max(bl * 2, l2));\n        nbuf.set(buf);\n        buf = nbuf;\n      }\n    };\n    var final = st.f || 0, pos = st.p || 0, bt = st.b || 0, lm = st.l, dm = st.d, lbt = st.m, dbt = st.n;\n    var tbts = sl * 8;\n    do {\n      if (!lm) {\n        final = bits(dat, pos, 1);\n        var type = bits(dat, pos + 1, 3);\n        pos += 3;\n        if (!type) {\n          var s = shft(pos) + 4, l = dat[s - 4] | dat[s - 3] << 8, t = s + l;\n          if (t > sl) {\n            if (noSt)\n              err(0);\n            break;\n          }\n          if (resize)\n            cbuf(bt + l);\n          buf.set(dat.subarray(s, t), bt);\n          st.b = bt += l, st.p = pos = t * 8, st.f = final;\n          continue;\n        } else if (type == 1)\n          lm = flrm, dm = fdrm, lbt = 9, dbt = 5;\n        else if (type == 2) {\n          var hLit = bits(dat, pos, 31) + 257, hcLen = bits(dat, pos + 10, 15) + 4;\n          var tl = hLit + bits(dat, pos + 5, 31) + 1;\n          pos += 14;\n          var ldt = new u8(tl);\n          var clt = new u8(19);\n          for (var i2 = 0; i2 < hcLen; ++i2) {\n            clt[clim[i2]] = bits(dat, pos + i2 * 3, 7);\n          }\n          pos += hcLen * 3;\n          var clb = max(clt), clbmsk = (1 << clb) - 1;\n          var clm = hMap(clt, clb, 1);\n          for (var i2 = 0; i2 < tl; ) {\n            var r = clm[bits(dat, pos, clbmsk)];\n            pos += r & 15;\n            var s = r >> 4;\n            if (s < 16) {\n              ldt[i2++] = s;\n            } else {\n              var c = 0, n = 0;\n              if (s == 16)\n                n = 3 + bits(dat, pos, 3), pos += 2, c = ldt[i2 - 1];\n              else if (s == 17)\n                n = 3 + bits(dat, pos, 7), pos += 3;\n              else if (s == 18)\n                n = 11 + bits(dat, pos, 127), pos += 7;\n              while (n--)\n                ldt[i2++] = c;\n            }\n          }\n          var lt = ldt.subarray(0, hLit), dt = ldt.subarray(hLit);\n          lbt = max(lt);\n          dbt = max(dt);\n          lm = hMap(lt, lbt, 1);\n          dm = hMap(dt, dbt, 1);\n        } else\n          err(1);\n        if (pos > tbts) {\n          if (noSt)\n            err(0);\n          break;\n        }\n      }\n      if (resize)\n        cbuf(bt + 131072);\n      var lms = (1 << lbt) - 1, dms = (1 << dbt) - 1;\n      var lpos = pos;\n      for (; ; lpos = pos) {\n        var c = lm[bits16(dat, pos) & lms], sym = c >> 4;\n        pos += c & 15;\n        if (pos > tbts) {\n          if (noSt)\n            err(0);\n          break;\n        }\n        if (!c)\n          err(2);\n        if (sym < 256)\n          buf[bt++] = sym;\n        else if (sym == 256) {\n          lpos = pos, lm = null;\n          break;\n        } else {\n          var add = sym - 254;\n          if (sym > 264) {\n            var i2 = sym - 257, b = fleb[i2];\n            add = bits(dat, pos, (1 << b) - 1) + fl[i2];\n            pos += b;\n          }\n          var d = dm[bits16(dat, pos) & dms], dsym = d >> 4;\n          if (!d)\n            err(3);\n          pos += d & 15;\n          var dt = fd[dsym];\n          if (dsym > 3) {\n            var b = fdeb[dsym];\n            dt += bits16(dat, pos) & (1 << b) - 1, pos += b;\n          }\n          if (pos > tbts) {\n            if (noSt)\n              err(0);\n            break;\n          }\n          if (resize)\n            cbuf(bt + 131072);\n          var end = bt + add;\n          if (bt < dt) {\n            var shift = dl - dt, dend = Math.min(dt, end);\n            if (shift + bt < 0)\n              err(3);\n            for (; bt < dend; ++bt)\n              buf[bt] = dict[shift + bt];\n          }\n          for (; bt < end; ++bt)\n            buf[bt] = buf[bt - dt];\n        }\n      }\n      st.l = lm, st.p = lpos, st.b = bt, st.f = final;\n      if (lm)\n        final = 1, st.m = lbt, st.d = dm, st.n = dbt;\n    } while (!final);\n    return bt != buf.length && noBuf ? slc(buf, 0, bt) : buf.subarray(0, bt);\n  };\n  var et = /* @__PURE__ */ new u8(0);\n  var mrg = function(a, b) {\n    var o = {};\n    for (var k in a)\n      o[k] = a[k];\n    for (var k in b)\n      o[k] = b[k];\n    return o;\n  };\n  var wcln = function(fn, fnStr, td2) {\n    var dt = fn();\n    var st = fn.toString();\n    var ks = st.slice(st.indexOf("[") + 1, st.lastIndexOf("]")).replace(/\\s+/g, "").split(",");\n    for (var i2 = 0; i2 < dt.length; ++i2) {\n      var v = dt[i2], k = ks[i2];\n      if (typeof v == "function") {\n        fnStr += ";" + k + "=";\n        var st_1 = v.toString();\n        if (v.prototype) {\n          if (st_1.indexOf("[native code]") != -1) {\n            var spInd = st_1.indexOf(" ", 8) + 1;\n            fnStr += st_1.slice(spInd, st_1.indexOf("(", spInd));\n          } else {\n            fnStr += st_1;\n            for (var t in v.prototype)\n              fnStr += ";" + k + ".prototype." + t + "=" + v.prototype[t].toString();\n          }\n        } else\n          fnStr += st_1;\n      } else\n        td2[k] = v;\n    }\n    return fnStr;\n  };\n  var ch = [];\n  var cbfs = function(v) {\n    var tl = [];\n    for (var k in v) {\n      if (v[k].buffer) {\n        tl.push((v[k] = new v[k].constructor(v[k])).buffer);\n      }\n    }\n    return tl;\n  };\n  var wrkr = function(fns, init, id, cb) {\n    if (!ch[id]) {\n      var fnStr = "", td_1 = {}, m = fns.length - 1;\n      for (var i2 = 0; i2 < m; ++i2)\n        fnStr = wcln(fns[i2], fnStr, td_1);\n      ch[id] = { c: wcln(fns[m], fnStr, td_1), e: td_1 };\n    }\n    var td2 = mrg({}, ch[id].e);\n    return wk(ch[id].c + ";onmessage=function(e){for(var k in e.data)self[k]=e.data[k];onmessage=" + init.toString() + "}", id, td2, cbfs(td2), cb);\n  };\n  var bInflt = function() {\n    return [u8, u16, i32, fleb, fdeb, clim, fl, fd, flrm, fdrm, rev, ec, hMap, max, bits, bits16, shft, slc, err, inflt, inflateSync, pbf, gopt];\n  };\n  var pbf = function(msg) {\n    return postMessage(msg, [msg.buffer]);\n  };\n  var gopt = function(o) {\n    return o && {\n      out: o.size && new u8(o.size),\n      dictionary: o.dictionary\n    };\n  };\n  var cbify = function(dat, opts, fns, init, id, cb) {\n    var w = wrkr(fns, init, id, function(err2, dat2) {\n      w.terminate();\n      cb(err2, dat2);\n    });\n    w.postMessage([dat, opts], opts.consume ? [dat.buffer] : []);\n    return function() {\n      w.terminate();\n    };\n  };\n  var b2 = function(d, b) {\n    return d[b] | d[b + 1] << 8;\n  };\n  var b4 = function(d, b) {\n    return (d[b] | d[b + 1] << 8 | d[b + 2] << 16 | d[b + 3] << 24) >>> 0;\n  };\n  var b8 = function(d, b) {\n    return b4(d, b) + b4(d, b + 4) * 4294967296;\n  };\n  var gzs = function(d) {\n    if (d[0] != 31 || d[1] != 139 || d[2] != 8)\n      err(6, "invalid gzip data");\n    var flg = d[3];\n    var st = 10;\n    if (flg & 4)\n      st += (d[10] | d[11] << 8) + 2;\n    for (var zs = (flg >> 3 & 1) + (flg >> 4 & 1); zs > 0; zs -= !d[st++])\n      ;\n    return st + (flg & 2);\n  };\n  var Inflate = /* @__PURE__ */ function() {\n    function Inflate2(opts, cb) {\n      if (typeof opts == "function")\n        cb = opts, opts = {};\n      this.ondata = cb;\n      var dict = opts && opts.dictionary && opts.dictionary.subarray(-32768);\n      this.s = { i: 0, b: dict ? dict.length : 0 };\n      this.o = new u8(32768);\n      this.p = new u8(0);\n      if (dict)\n        this.o.set(dict);\n    }\n    Inflate2.prototype.e = function(c) {\n      if (!this.ondata)\n        err(5);\n      if (this.d)\n        err(4);\n      if (!this.p.length)\n        this.p = c;\n      else if (c.length) {\n        var n = new u8(this.p.length + c.length);\n        n.set(this.p), n.set(c, this.p.length), this.p = n;\n      }\n    };\n    Inflate2.prototype.c = function(final) {\n      this.s.i = +(this.d = final || false);\n      var bts = this.s.b;\n      var dt = inflt(this.p, this.s, this.o);\n      this.ondata(slc(dt, bts, this.s.b), this.d);\n      this.o = slc(dt, this.s.b - 32768), this.s.b = this.o.length;\n      this.p = slc(this.p, this.s.p / 8 | 0), this.s.p &= 7;\n    };\n    Inflate2.prototype.push = function(chunk, final) {\n      this.e(chunk), this.c(final);\n    };\n    return Inflate2;\n  }();\n  function inflate(data, opts, cb) {\n    if (!cb)\n      cb = opts, opts = {};\n    if (typeof cb != "function")\n      err(7);\n    return cbify(data, opts, [\n      bInflt\n    ], function(ev) {\n      return pbf(inflateSync(ev.data[0], gopt(ev.data[1])));\n    }, 1, cb);\n  }\n  function inflateSync(data, opts) {\n    return inflt(data, { i: 2 }, opts && opts.out, opts && opts.dictionary);\n  }\n  var Gunzip = /* @__PURE__ */ function() {\n    function Gunzip2(opts, cb) {\n      this.v = 1;\n      this.r = 0;\n      Inflate.call(this, opts, cb);\n    }\n    Gunzip2.prototype.push = function(chunk, final) {\n      Inflate.prototype.e.call(this, chunk);\n      this.r += chunk.length;\n      if (this.v) {\n        var p = this.p.subarray(this.v - 1);\n        var s = p.length > 3 ? gzs(p) : 4;\n        if (s > p.length) {\n          if (!final)\n            return;\n        } else if (this.v > 1 && this.onmember) {\n          this.onmember(this.r - p.length);\n        }\n        this.p = p.subarray(s), this.v = 0;\n      }\n      Inflate.prototype.c.call(this, final);\n      if (this.s.f && !this.s.l && !final) {\n        this.v = shft(this.s.p) + 9;\n        this.s = { i: 0 };\n        this.o = new u8(0);\n        this.push(new u8(0), final);\n      }\n    };\n    return Gunzip2;\n  }();\n  var td = typeof TextDecoder != "undefined" && /* @__PURE__ */ new TextDecoder();\n  try {\n    td.decode(et, { stream: true });\n  } catch (e) {\n  }\n  var dutf8 = function(d) {\n    for (var r = "", i2 = 0; ; ) {\n      var c = d[i2++];\n      var eb = (c > 127) + (c > 223) + (c > 239);\n      if (i2 + eb > d.length)\n        return { s: r, r: slc(d, i2 - 1) };\n      if (!eb)\n        r += String.fromCharCode(c);\n      else if (eb == 3) {\n        c = ((c & 15) << 18 | (d[i2++] & 63) << 12 | (d[i2++] & 63) << 6 | d[i2++] & 63) - 65536, r += String.fromCharCode(55296 | c >> 10, 56320 | c & 1023);\n      } else if (eb & 1)\n        r += String.fromCharCode((c & 31) << 6 | d[i2++] & 63);\n      else\n        r += String.fromCharCode((c & 15) << 12 | (d[i2++] & 63) << 6 | d[i2++] & 63);\n    }\n  };\n  function strFromU8(dat, latin1) {\n    if (latin1) {\n      var r = "";\n      for (var i2 = 0; i2 < dat.length; i2 += 16384)\n        r += String.fromCharCode.apply(null, dat.subarray(i2, i2 + 16384));\n      return r;\n    } else if (td) {\n      return td.decode(dat);\n    } else {\n      var _a2 = dutf8(dat), s = _a2.s, r = _a2.r;\n      if (r.length)\n        err(8);\n      return s;\n    }\n  }\n  var slzh = function(d, b) {\n    return b + 30 + b2(d, b + 26) + b2(d, b + 28);\n  };\n  var zh = function(d, b, z) {\n    var fnl = b2(d, b + 28), fn = strFromU8(d.subarray(b + 46, b + 46 + fnl), !(b2(d, b + 8) & 2048)), es = b + 46 + fnl, bs = b4(d, b + 20);\n    var _a2 = z && bs == 4294967295 ? z64e(d, es) : [bs, b4(d, b + 24), b4(d, b + 42)], sc = _a2[0], su = _a2[1], off = _a2[2];\n    return [b2(d, b + 10), sc, su, fn, es + b2(d, b + 30) + b2(d, b + 32), off];\n  };\n  var z64e = function(d, b) {\n    for (; b2(d, b) != 1; b += 4 + b2(d, b + 2))\n      ;\n    return [b8(d, b + 12), b8(d, b + 4), b8(d, b + 20)];\n  };\n  var mt = typeof queueMicrotask == "function" ? queueMicrotask : typeof setTimeout == "function" ? setTimeout : function(fn) {\n    fn();\n  };\n  function unzip(data, opts, cb) {\n    if (!cb)\n      cb = opts, opts = {};\n    if (typeof cb != "function")\n      err(7);\n    var term = [];\n    var tAll = function() {\n      for (var i3 = 0; i3 < term.length; ++i3)\n        term[i3]();\n    };\n    var files = {};\n    var cbd = function(a, b) {\n      mt(function() {\n        cb(a, b);\n      });\n    };\n    mt(function() {\n      cbd = cb;\n    });\n    var e = data.length - 22;\n    for (; b4(data, e) != 101010256; --e) {\n      if (!e || data.length - e > 65558) {\n        cbd(err(13, 0, 1), null);\n        return tAll;\n      }\n    }\n    var lft = b2(data, e + 8);\n    if (lft) {\n      var c = lft;\n      var o = b4(data, e + 16);\n      var z = o == 4294967295 || c == 65535;\n      if (z) {\n        var ze = b4(data, e - 12);\n        z = b4(data, ze) == 101075792;\n        if (z) {\n          c = lft = b4(data, ze + 32);\n          o = b4(data, ze + 48);\n        }\n      }\n      var fltr = opts && opts.filter;\n      var _loop_3 = function(i3) {\n        var _a2 = zh(data, o, z), c_1 = _a2[0], sc = _a2[1], su = _a2[2], fn = _a2[3], no = _a2[4], off = _a2[5], b = slzh(data, off);\n        o = no;\n        var cbl = function(e2, d) {\n          if (e2) {\n            tAll();\n            cbd(e2, null);\n          } else {\n            if (d)\n              files[fn] = d;\n            if (!--lft)\n              cbd(null, files);\n          }\n        };\n        if (!fltr || fltr({\n          name: fn,\n          size: sc,\n          originalSize: su,\n          compression: c_1\n        })) {\n          if (!c_1)\n            cbl(null, slc(data, b, b + sc));\n          else if (c_1 == 8) {\n            var infl = data.subarray(b, b + sc);\n            if (su < 524288 || sc > 0.8 * su) {\n              try {\n                cbl(null, inflateSync(infl, { out: new u8(su) }));\n              } catch (e2) {\n                cbl(e2, null);\n              }\n            } else\n              term.push(inflate(infl, { size: su }, cbl));\n          } else\n            cbl(err(14, "unknown compression type " + c_1, 1), null);\n        } else\n          cbl(null, null);\n      };\n      for (var i2 = 0; i2 < c; ++i2) {\n        _loop_3(i2);\n      }\n    } else\n      cbd(null, {});\n    return tAll;\n  }\n  function unzipSync(data, opts) {\n    var files = {};\n    var e = data.length - 22;\n    for (; b4(data, e) != 101010256; --e) {\n      if (!e || data.length - e > 65558)\n        err(13);\n    }\n    var c = b2(data, e + 8);\n    if (!c)\n      return {};\n    var o = b4(data, e + 16);\n    var z = o == 4294967295 || c == 65535;\n    if (z) {\n      var ze = b4(data, e - 12);\n      z = b4(data, ze) == 101075792;\n      if (z) {\n        c = b4(data, ze + 32);\n        o = b4(data, ze + 48);\n      }\n    }\n    var fltr = opts && opts.filter;\n    for (var i2 = 0; i2 < c; ++i2) {\n      var _a2 = zh(data, o, z), c_2 = _a2[0], sc = _a2[1], su = _a2[2], fn = _a2[3], no = _a2[4], off = _a2[5], b = slzh(data, off);\n      o = no;\n      if (!fltr || fltr({\n        name: fn,\n        size: sc,\n        originalSize: su,\n        compression: c_2\n      })) {\n        if (!c_2)\n          files[fn] = slc(data, b, b + sc);\n        else if (c_2 == 8)\n          files[fn] = inflateSync(data.subarray(b, b + sc), { out: new u8(su) });\n        else\n          err(14, "unknown compression type " + c_2);\n      }\n    }\n    return files;\n  }\n  /**\n   * @license\n   * Copyright 2010-2025 Three.js Authors\n   * SPDX-License-Identifier: MIT\n   */\n  const REVISION = "178";\n  const NoColorSpace = "";\n  const SRGBColorSpace = "srgb";\n  const LinearSRGBColorSpace = "srgb-linear";\n  const LinearTransfer = "linear";\n  const SRGBTransfer = "srgb";\n  function clamp(value, min, max2) {\n    return Math.max(min, Math.min(max2, value));\n  }\n  function euclideanModulo(n, m) {\n    return (n % m + m) % m;\n  }\n  function lerp(x2, y, t) {\n    return (1 - t) * x2 + t * y;\n  }\n  class Quaternion {\n    /**\n     * Constructs a new quaternion.\n     *\n     * @param {number} [x=0] - The x value of this quaternion.\n     * @param {number} [y=0] - The y value of this quaternion.\n     * @param {number} [z=0] - The z value of this quaternion.\n     * @param {number} [w=1] - The w value of this quaternion.\n     */\n    constructor(x2 = 0, y = 0, z = 0, w = 1) {\n      this.isQuaternion = true;\n      this._x = x2;\n      this._y = y;\n      this._z = z;\n      this._w = w;\n    }\n    /**\n     * Interpolates between two quaternions via SLERP. This implementation assumes the\n     * quaternion data are managed  in flat arrays.\n     *\n     * @param {Array<number>} dst - The destination array.\n     * @param {number} dstOffset - An offset into the destination array.\n     * @param {Array<number>} src0 - The source array of the first quaternion.\n     * @param {number} srcOffset0 - An offset into the first source array.\n     * @param {Array<number>} src1 -  The source array of the second quaternion.\n     * @param {number} srcOffset1 - An offset into the second source array.\n     * @param {number} t - The interpolation factor in the range `[0,1]`.\n     * @see {@link Quaternion#slerp}\n     */\n    static slerpFlat(dst, dstOffset, src0, srcOffset0, src1, srcOffset1, t) {\n      let x0 = src0[srcOffset0 + 0], y0 = src0[srcOffset0 + 1], z0 = src0[srcOffset0 + 2], w0 = src0[srcOffset0 + 3];\n      const x1 = src1[srcOffset1 + 0], y1 = src1[srcOffset1 + 1], z1 = src1[srcOffset1 + 2], w1 = src1[srcOffset1 + 3];\n      if (t === 0) {\n        dst[dstOffset + 0] = x0;\n        dst[dstOffset + 1] = y0;\n        dst[dstOffset + 2] = z0;\n        dst[dstOffset + 3] = w0;\n        return;\n      }\n      if (t === 1) {\n        dst[dstOffset + 0] = x1;\n        dst[dstOffset + 1] = y1;\n        dst[dstOffset + 2] = z1;\n        dst[dstOffset + 3] = w1;\n        return;\n      }\n      if (w0 !== w1 || x0 !== x1 || y0 !== y1 || z0 !== z1) {\n        let s = 1 - t;\n        const cos = x0 * x1 + y0 * y1 + z0 * z1 + w0 * w1, dir = cos >= 0 ? 1 : -1, sqrSin = 1 - cos * cos;\n        if (sqrSin > Number.EPSILON) {\n          const sin = Math.sqrt(sqrSin), len = Math.atan2(sin, cos * dir);\n          s = Math.sin(s * len) / sin;\n          t = Math.sin(t * len) / sin;\n        }\n        const tDir = t * dir;\n        x0 = x0 * s + x1 * tDir;\n        y0 = y0 * s + y1 * tDir;\n        z0 = z0 * s + z1 * tDir;\n        w0 = w0 * s + w1 * tDir;\n        if (s === 1 - t) {\n          const f = 1 / Math.sqrt(x0 * x0 + y0 * y0 + z0 * z0 + w0 * w0);\n          x0 *= f;\n          y0 *= f;\n          z0 *= f;\n          w0 *= f;\n        }\n      }\n      dst[dstOffset] = x0;\n      dst[dstOffset + 1] = y0;\n      dst[dstOffset + 2] = z0;\n      dst[dstOffset + 3] = w0;\n    }\n    /**\n     * Multiplies two quaternions. This implementation assumes the quaternion data are managed\n     * in flat arrays.\n     *\n     * @param {Array<number>} dst - The destination array.\n     * @param {number} dstOffset - An offset into the destination array.\n     * @param {Array<number>} src0 - The source array of the first quaternion.\n     * @param {number} srcOffset0 - An offset into the first source array.\n     * @param {Array<number>} src1 -  The source array of the second quaternion.\n     * @param {number} srcOffset1 - An offset into the second source array.\n     * @return {Array<number>} The destination array.\n     * @see {@link Quaternion#multiplyQuaternions}.\n     */\n    static multiplyQuaternionsFlat(dst, dstOffset, src0, srcOffset0, src1, srcOffset1) {\n      const x0 = src0[srcOffset0];\n      const y0 = src0[srcOffset0 + 1];\n      const z0 = src0[srcOffset0 + 2];\n      const w0 = src0[srcOffset0 + 3];\n      const x1 = src1[srcOffset1];\n      const y1 = src1[srcOffset1 + 1];\n      const z1 = src1[srcOffset1 + 2];\n      const w1 = src1[srcOffset1 + 3];\n      dst[dstOffset] = x0 * w1 + w0 * x1 + y0 * z1 - z0 * y1;\n      dst[dstOffset + 1] = y0 * w1 + w0 * y1 + z0 * x1 - x0 * z1;\n      dst[dstOffset + 2] = z0 * w1 + w0 * z1 + x0 * y1 - y0 * x1;\n      dst[dstOffset + 3] = w0 * w1 - x0 * x1 - y0 * y1 - z0 * z1;\n      return dst;\n    }\n    /**\n     * The x value of this quaternion.\n     *\n     * @type {number}\n     * @default 0\n     */\n    get x() {\n      return this._x;\n    }\n    set x(value) {\n      this._x = value;\n      this._onChangeCallback();\n    }\n    /**\n     * The y value of this quaternion.\n     *\n     * @type {number}\n     * @default 0\n     */\n    get y() {\n      return this._y;\n    }\n    set y(value) {\n      this._y = value;\n      this._onChangeCallback();\n    }\n    /**\n     * The z value of this quaternion.\n     *\n     * @type {number}\n     * @default 0\n     */\n    get z() {\n      return this._z;\n    }\n    set z(value) {\n      this._z = value;\n      this._onChangeCallback();\n    }\n    /**\n     * The w value of this quaternion.\n     *\n     * @type {number}\n     * @default 1\n     */\n    get w() {\n      return this._w;\n    }\n    set w(value) {\n      this._w = value;\n      this._onChangeCallback();\n    }\n    /**\n     * Sets the quaternion components.\n     *\n     * @param {number} x - The x value of this quaternion.\n     * @param {number} y - The y value of this quaternion.\n     * @param {number} z - The z value of this quaternion.\n     * @param {number} w - The w value of this quaternion.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    set(x2, y, z, w) {\n      this._x = x2;\n      this._y = y;\n      this._z = z;\n      this._w = w;\n      this._onChangeCallback();\n      return this;\n    }\n    /**\n     * Returns a new quaternion with copied values from this instance.\n     *\n     * @return {Quaternion} A clone of this instance.\n     */\n    clone() {\n      return new this.constructor(this._x, this._y, this._z, this._w);\n    }\n    /**\n     * Copies the values of the given quaternion to this instance.\n     *\n     * @param {Quaternion} quaternion - The quaternion to copy.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    copy(quaternion) {\n      this._x = quaternion.x;\n      this._y = quaternion.y;\n      this._z = quaternion.z;\n      this._w = quaternion.w;\n      this._onChangeCallback();\n      return this;\n    }\n    /**\n     * Sets this quaternion from the rotation specified by the given\n     * Euler angles.\n     *\n     * @param {Euler} euler - The Euler angles.\n     * @param {boolean} [update=true] - Whether the internal `onChange` callback should be executed or not.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    setFromEuler(euler, update = true) {\n      const x2 = euler._x, y = euler._y, z = euler._z, order = euler._order;\n      const cos = Math.cos;\n      const sin = Math.sin;\n      const c1 = cos(x2 / 2);\n      const c2 = cos(y / 2);\n      const c3 = cos(z / 2);\n      const s1 = sin(x2 / 2);\n      const s2 = sin(y / 2);\n      const s3 = sin(z / 2);\n      switch (order) {\n        case "XYZ":\n          this._x = s1 * c2 * c3 + c1 * s2 * s3;\n          this._y = c1 * s2 * c3 - s1 * c2 * s3;\n          this._z = c1 * c2 * s3 + s1 * s2 * c3;\n          this._w = c1 * c2 * c3 - s1 * s2 * s3;\n          break;\n        case "YXZ":\n          this._x = s1 * c2 * c3 + c1 * s2 * s3;\n          this._y = c1 * s2 * c3 - s1 * c2 * s3;\n          this._z = c1 * c2 * s3 - s1 * s2 * c3;\n          this._w = c1 * c2 * c3 + s1 * s2 * s3;\n          break;\n        case "ZXY":\n          this._x = s1 * c2 * c3 - c1 * s2 * s3;\n          this._y = c1 * s2 * c3 + s1 * c2 * s3;\n          this._z = c1 * c2 * s3 + s1 * s2 * c3;\n          this._w = c1 * c2 * c3 - s1 * s2 * s3;\n          break;\n        case "ZYX":\n          this._x = s1 * c2 * c3 - c1 * s2 * s3;\n          this._y = c1 * s2 * c3 + s1 * c2 * s3;\n          this._z = c1 * c2 * s3 - s1 * s2 * c3;\n          this._w = c1 * c2 * c3 + s1 * s2 * s3;\n          break;\n        case "YZX":\n          this._x = s1 * c2 * c3 + c1 * s2 * s3;\n          this._y = c1 * s2 * c3 + s1 * c2 * s3;\n          this._z = c1 * c2 * s3 - s1 * s2 * c3;\n          this._w = c1 * c2 * c3 - s1 * s2 * s3;\n          break;\n        case "XZY":\n          this._x = s1 * c2 * c3 - c1 * s2 * s3;\n          this._y = c1 * s2 * c3 - s1 * c2 * s3;\n          this._z = c1 * c2 * s3 + s1 * s2 * c3;\n          this._w = c1 * c2 * c3 + s1 * s2 * s3;\n          break;\n        default:\n          console.warn("THREE.Quaternion: .setFromEuler() encountered an unknown order: " + order);\n      }\n      if (update === true) this._onChangeCallback();\n      return this;\n    }\n    /**\n     * Sets this quaternion from the given axis and angle.\n     *\n     * @param {Vector3} axis - The normalized axis.\n     * @param {number} angle - The angle in radians.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    setFromAxisAngle(axis, angle) {\n      const halfAngle = angle / 2, s = Math.sin(halfAngle);\n      this._x = axis.x * s;\n      this._y = axis.y * s;\n      this._z = axis.z * s;\n      this._w = Math.cos(halfAngle);\n      this._onChangeCallback();\n      return this;\n    }\n    /**\n     * Sets this quaternion from the given rotation matrix.\n     *\n     * @param {Matrix4} m - A 4x4 matrix of which the upper 3x3 of matrix is a pure rotation matrix (i.e. unscaled).\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    setFromRotationMatrix(m) {\n      const te = m.elements, m11 = te[0], m12 = te[4], m13 = te[8], m21 = te[1], m22 = te[5], m23 = te[9], m31 = te[2], m32 = te[6], m33 = te[10], trace = m11 + m22 + m33;\n      if (trace > 0) {\n        const s = 0.5 / Math.sqrt(trace + 1);\n        this._w = 0.25 / s;\n        this._x = (m32 - m23) * s;\n        this._y = (m13 - m31) * s;\n        this._z = (m21 - m12) * s;\n      } else if (m11 > m22 && m11 > m33) {\n        const s = 2 * Math.sqrt(1 + m11 - m22 - m33);\n        this._w = (m32 - m23) / s;\n        this._x = 0.25 * s;\n        this._y = (m12 + m21) / s;\n        this._z = (m13 + m31) / s;\n      } else if (m22 > m33) {\n        const s = 2 * Math.sqrt(1 + m22 - m11 - m33);\n        this._w = (m13 - m31) / s;\n        this._x = (m12 + m21) / s;\n        this._y = 0.25 * s;\n        this._z = (m23 + m32) / s;\n      } else {\n        const s = 2 * Math.sqrt(1 + m33 - m11 - m22);\n        this._w = (m21 - m12) / s;\n        this._x = (m13 + m31) / s;\n        this._y = (m23 + m32) / s;\n        this._z = 0.25 * s;\n      }\n      this._onChangeCallback();\n      return this;\n    }\n    /**\n     * Sets this quaternion to the rotation required to rotate the direction vector\n     * `vFrom` to the direction vector `vTo`.\n     *\n     * @param {Vector3} vFrom - The first (normalized) direction vector.\n     * @param {Vector3} vTo - The second (normalized) direction vector.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    setFromUnitVectors(vFrom, vTo) {\n      let r = vFrom.dot(vTo) + 1;\n      if (r < 1e-8) {\n        r = 0;\n        if (Math.abs(vFrom.x) > Math.abs(vFrom.z)) {\n          this._x = -vFrom.y;\n          this._y = vFrom.x;\n          this._z = 0;\n          this._w = r;\n        } else {\n          this._x = 0;\n          this._y = -vFrom.z;\n          this._z = vFrom.y;\n          this._w = r;\n        }\n      } else {\n        this._x = vFrom.y * vTo.z - vFrom.z * vTo.y;\n        this._y = vFrom.z * vTo.x - vFrom.x * vTo.z;\n        this._z = vFrom.x * vTo.y - vFrom.y * vTo.x;\n        this._w = r;\n      }\n      return this.normalize();\n    }\n    /**\n     * Returns the angle between this quaternion and the given one in radians.\n     *\n     * @param {Quaternion} q - The quaternion to compute the angle with.\n     * @return {number} The angle in radians.\n     */\n    angleTo(q) {\n      return 2 * Math.acos(Math.abs(clamp(this.dot(q), -1, 1)));\n    }\n    /**\n     * Rotates this quaternion by a given angular step to the given quaternion.\n     * The method ensures that the final quaternion will not overshoot `q`.\n     *\n     * @param {Quaternion} q - The target quaternion.\n     * @param {number} step - The angular step in radians.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    rotateTowards(q, step) {\n      const angle = this.angleTo(q);\n      if (angle === 0) return this;\n      const t = Math.min(1, step / angle);\n      this.slerp(q, t);\n      return this;\n    }\n    /**\n     * Sets this quaternion to the identity quaternion; that is, to the\n     * quaternion that represents "no rotation".\n     *\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    identity() {\n      return this.set(0, 0, 0, 1);\n    }\n    /**\n     * Inverts this quaternion via {@link Quaternion#conjugate}. The\n     * quaternion is assumed to have unit length.\n     *\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    invert() {\n      return this.conjugate();\n    }\n    /**\n     * Returns the rotational conjugate of this quaternion. The conjugate of a\n     * quaternion represents the same rotation in the opposite direction about\n     * the rotational axis.\n     *\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    conjugate() {\n      this._x *= -1;\n      this._y *= -1;\n      this._z *= -1;\n      this._onChangeCallback();\n      return this;\n    }\n    /**\n     * Calculates the dot product of this quaternion and the given one.\n     *\n     * @param {Quaternion} v - The quaternion to compute the dot product with.\n     * @return {number} The result of the dot product.\n     */\n    dot(v) {\n      return this._x * v._x + this._y * v._y + this._z * v._z + this._w * v._w;\n    }\n    /**\n     * Computes the squared Euclidean length (straight-line length) of this quaternion,\n     * considered as a 4 dimensional vector. This can be useful if you are comparing the\n     * lengths of two quaternions, as this is a slightly more efficient calculation than\n     * {@link Quaternion#length}.\n     *\n     * @return {number} The squared Euclidean length.\n     */\n    lengthSq() {\n      return this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w;\n    }\n    /**\n     * Computes the Euclidean length (straight-line length) of this quaternion,\n     * considered as a 4 dimensional vector.\n     *\n     * @return {number} The Euclidean length.\n     */\n    length() {\n      return Math.sqrt(this._x * this._x + this._y * this._y + this._z * this._z + this._w * this._w);\n    }\n    /**\n     * Normalizes this quaternion - that is, calculated the quaternion that performs\n     * the same rotation as this one, but has a length equal to `1`.\n     *\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    normalize() {\n      let l = this.length();\n      if (l === 0) {\n        this._x = 0;\n        this._y = 0;\n        this._z = 0;\n        this._w = 1;\n      } else {\n        l = 1 / l;\n        this._x = this._x * l;\n        this._y = this._y * l;\n        this._z = this._z * l;\n        this._w = this._w * l;\n      }\n      this._onChangeCallback();\n      return this;\n    }\n    /**\n     * Multiplies this quaternion by the given one.\n     *\n     * @param {Quaternion} q - The quaternion.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    multiply(q) {\n      return this.multiplyQuaternions(this, q);\n    }\n    /**\n     * Pre-multiplies this quaternion by the given one.\n     *\n     * @param {Quaternion} q - The quaternion.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    premultiply(q) {\n      return this.multiplyQuaternions(q, this);\n    }\n    /**\n     * Multiplies the given quaternions and stores the result in this instance.\n     *\n     * @param {Quaternion} a - The first quaternion.\n     * @param {Quaternion} b - The second quaternion.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    multiplyQuaternions(a, b) {\n      const qax = a._x, qay = a._y, qaz = a._z, qaw = a._w;\n      const qbx = b._x, qby = b._y, qbz = b._z, qbw = b._w;\n      this._x = qax * qbw + qaw * qbx + qay * qbz - qaz * qby;\n      this._y = qay * qbw + qaw * qby + qaz * qbx - qax * qbz;\n      this._z = qaz * qbw + qaw * qbz + qax * qby - qay * qbx;\n      this._w = qaw * qbw - qax * qbx - qay * qby - qaz * qbz;\n      this._onChangeCallback();\n      return this;\n    }\n    /**\n     * Performs a spherical linear interpolation between quaternions.\n     *\n     * @param {Quaternion} qb - The target quaternion.\n     * @param {number} t - The interpolation factor in the closed interval `[0, 1]`.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    slerp(qb, t) {\n      if (t === 0) return this;\n      if (t === 1) return this.copy(qb);\n      const x2 = this._x, y = this._y, z = this._z, w = this._w;\n      let cosHalfTheta = w * qb._w + x2 * qb._x + y * qb._y + z * qb._z;\n      if (cosHalfTheta < 0) {\n        this._w = -qb._w;\n        this._x = -qb._x;\n        this._y = -qb._y;\n        this._z = -qb._z;\n        cosHalfTheta = -cosHalfTheta;\n      } else {\n        this.copy(qb);\n      }\n      if (cosHalfTheta >= 1) {\n        this._w = w;\n        this._x = x2;\n        this._y = y;\n        this._z = z;\n        return this;\n      }\n      const sqrSinHalfTheta = 1 - cosHalfTheta * cosHalfTheta;\n      if (sqrSinHalfTheta <= Number.EPSILON) {\n        const s = 1 - t;\n        this._w = s * w + t * this._w;\n        this._x = s * x2 + t * this._x;\n        this._y = s * y + t * this._y;\n        this._z = s * z + t * this._z;\n        this.normalize();\n        return this;\n      }\n      const sinHalfTheta = Math.sqrt(sqrSinHalfTheta);\n      const halfTheta = Math.atan2(sinHalfTheta, cosHalfTheta);\n      const ratioA = Math.sin((1 - t) * halfTheta) / sinHalfTheta, ratioB = Math.sin(t * halfTheta) / sinHalfTheta;\n      this._w = w * ratioA + this._w * ratioB;\n      this._x = x2 * ratioA + this._x * ratioB;\n      this._y = y * ratioA + this._y * ratioB;\n      this._z = z * ratioA + this._z * ratioB;\n      this._onChangeCallback();\n      return this;\n    }\n    /**\n     * Performs a spherical linear interpolation between the given quaternions\n     * and stores the result in this quaternion.\n     *\n     * @param {Quaternion} qa - The source quaternion.\n     * @param {Quaternion} qb - The target quaternion.\n     * @param {number} t - The interpolation factor in the closed interval `[0, 1]`.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    slerpQuaternions(qa, qb, t) {\n      return this.copy(qa).slerp(qb, t);\n    }\n    /**\n     * Sets this quaternion to a uniformly random, normalized quaternion.\n     *\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    random() {\n      const theta1 = 2 * Math.PI * Math.random();\n      const theta2 = 2 * Math.PI * Math.random();\n      const x0 = Math.random();\n      const r1 = Math.sqrt(1 - x0);\n      const r2 = Math.sqrt(x0);\n      return this.set(\n        r1 * Math.sin(theta1),\n        r1 * Math.cos(theta1),\n        r2 * Math.sin(theta2),\n        r2 * Math.cos(theta2)\n      );\n    }\n    /**\n     * Returns `true` if this quaternion is equal with the given one.\n     *\n     * @param {Quaternion} quaternion - The quaternion to test for equality.\n     * @return {boolean} Whether this quaternion is equal with the given one.\n     */\n    equals(quaternion) {\n      return quaternion._x === this._x && quaternion._y === this._y && quaternion._z === this._z && quaternion._w === this._w;\n    }\n    /**\n     * Sets this quaternion\'s components from the given array.\n     *\n     * @param {Array<number>} array - An array holding the quaternion component values.\n     * @param {number} [offset=0] - The offset into the array.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    fromArray(array, offset = 0) {\n      this._x = array[offset];\n      this._y = array[offset + 1];\n      this._z = array[offset + 2];\n      this._w = array[offset + 3];\n      this._onChangeCallback();\n      return this;\n    }\n    /**\n     * Writes the components of this quaternion to the given array. If no array is provided,\n     * the method returns a new instance.\n     *\n     * @param {Array<number>} [array=[]] - The target array holding the quaternion components.\n     * @param {number} [offset=0] - Index of the first element in the array.\n     * @return {Array<number>} The quaternion components.\n     */\n    toArray(array = [], offset = 0) {\n      array[offset] = this._x;\n      array[offset + 1] = this._y;\n      array[offset + 2] = this._z;\n      array[offset + 3] = this._w;\n      return array;\n    }\n    /**\n     * Sets the components of this quaternion from the given buffer attribute.\n     *\n     * @param {BufferAttribute} attribute - The buffer attribute holding quaternion data.\n     * @param {number} index - The index into the attribute.\n     * @return {Quaternion} A reference to this quaternion.\n     */\n    fromBufferAttribute(attribute, index) {\n      this._x = attribute.getX(index);\n      this._y = attribute.getY(index);\n      this._z = attribute.getZ(index);\n      this._w = attribute.getW(index);\n      this._onChangeCallback();\n      return this;\n    }\n    /**\n     * This methods defines the serialization result of this class. Returns the\n     * numerical elements of this quaternion in an array of format `[x, y, z, w]`.\n     *\n     * @return {Array<number>} The serialized quaternion.\n     */\n    toJSON() {\n      return this.toArray();\n    }\n    _onChange(callback) {\n      this._onChangeCallback = callback;\n      return this;\n    }\n    _onChangeCallback() {\n    }\n    *[Symbol.iterator]() {\n      yield this._x;\n      yield this._y;\n      yield this._z;\n      yield this._w;\n    }\n  }\n  class Vector3 {\n    /**\n     * Constructs a new 3D vector.\n     *\n     * @param {number} [x=0] - The x value of this vector.\n     * @param {number} [y=0] - The y value of this vector.\n     * @param {number} [z=0] - The z value of this vector.\n     */\n    constructor(x2 = 0, y = 0, z = 0) {\n      Vector3.prototype.isVector3 = true;\n      this.x = x2;\n      this.y = y;\n      this.z = z;\n    }\n    /**\n     * Sets the vector components.\n     *\n     * @param {number} x - The value of the x component.\n     * @param {number} y - The value of the y component.\n     * @param {number} z - The value of the z component.\n     * @return {Vector3} A reference to this vector.\n     */\n    set(x2, y, z) {\n      if (z === void 0) z = this.z;\n      this.x = x2;\n      this.y = y;\n      this.z = z;\n      return this;\n    }\n    /**\n     * Sets the vector components to the same value.\n     *\n     * @param {number} scalar - The value to set for all vector components.\n     * @return {Vector3} A reference to this vector.\n     */\n    setScalar(scalar) {\n      this.x = scalar;\n      this.y = scalar;\n      this.z = scalar;\n      return this;\n    }\n    /**\n     * Sets the vector\'s x component to the given value\n     *\n     * @param {number} x - The value to set.\n     * @return {Vector3} A reference to this vector.\n     */\n    setX(x2) {\n      this.x = x2;\n      return this;\n    }\n    /**\n     * Sets the vector\'s y component to the given value\n     *\n     * @param {number} y - The value to set.\n     * @return {Vector3} A reference to this vector.\n     */\n    setY(y) {\n      this.y = y;\n      return this;\n    }\n    /**\n     * Sets the vector\'s z component to the given value\n     *\n     * @param {number} z - The value to set.\n     * @return {Vector3} A reference to this vector.\n     */\n    setZ(z) {\n      this.z = z;\n      return this;\n    }\n    /**\n     * Allows to set a vector component with an index.\n     *\n     * @param {number} index - The component index. `0` equals to x, `1` equals to y, `2` equals to z.\n     * @param {number} value - The value to set.\n     * @return {Vector3} A reference to this vector.\n     */\n    setComponent(index, value) {\n      switch (index) {\n        case 0:\n          this.x = value;\n          break;\n        case 1:\n          this.y = value;\n          break;\n        case 2:\n          this.z = value;\n          break;\n        default:\n          throw new Error("index is out of range: " + index);\n      }\n      return this;\n    }\n    /**\n     * Returns the value of the vector component which matches the given index.\n     *\n     * @param {number} index - The component index. `0` equals to x, `1` equals to y, `2` equals to z.\n     * @return {number} A vector component value.\n     */\n    getComponent(index) {\n      switch (index) {\n        case 0:\n          return this.x;\n        case 1:\n          return this.y;\n        case 2:\n          return this.z;\n        default:\n          throw new Error("index is out of range: " + index);\n      }\n    }\n    /**\n     * Returns a new vector with copied values from this instance.\n     *\n     * @return {Vector3} A clone of this instance.\n     */\n    clone() {\n      return new this.constructor(this.x, this.y, this.z);\n    }\n    /**\n     * Copies the values of the given vector to this instance.\n     *\n     * @param {Vector3} v - The vector to copy.\n     * @return {Vector3} A reference to this vector.\n     */\n    copy(v) {\n      this.x = v.x;\n      this.y = v.y;\n      this.z = v.z;\n      return this;\n    }\n    /**\n     * Adds the given vector to this instance.\n     *\n     * @param {Vector3} v - The vector to add.\n     * @return {Vector3} A reference to this vector.\n     */\n    add(v) {\n      this.x += v.x;\n      this.y += v.y;\n      this.z += v.z;\n      return this;\n    }\n    /**\n     * Adds the given scalar value to all components of this instance.\n     *\n     * @param {number} s - The scalar to add.\n     * @return {Vector3} A reference to this vector.\n     */\n    addScalar(s) {\n      this.x += s;\n      this.y += s;\n      this.z += s;\n      return this;\n    }\n    /**\n     * Adds the given vectors and stores the result in this instance.\n     *\n     * @param {Vector3} a - The first vector.\n     * @param {Vector3} b - The second vector.\n     * @return {Vector3} A reference to this vector.\n     */\n    addVectors(a, b) {\n      this.x = a.x + b.x;\n      this.y = a.y + b.y;\n      this.z = a.z + b.z;\n      return this;\n    }\n    /**\n     * Adds the given vector scaled by the given factor to this instance.\n     *\n     * @param {Vector3|Vector4} v - The vector.\n     * @param {number} s - The factor that scales `v`.\n     * @return {Vector3} A reference to this vector.\n     */\n    addScaledVector(v, s) {\n      this.x += v.x * s;\n      this.y += v.y * s;\n      this.z += v.z * s;\n      return this;\n    }\n    /**\n     * Subtracts the given vector from this instance.\n     *\n     * @param {Vector3} v - The vector to subtract.\n     * @return {Vector3} A reference to this vector.\n     */\n    sub(v) {\n      this.x -= v.x;\n      this.y -= v.y;\n      this.z -= v.z;\n      return this;\n    }\n    /**\n     * Subtracts the given scalar value from all components of this instance.\n     *\n     * @param {number} s - The scalar to subtract.\n     * @return {Vector3} A reference to this vector.\n     */\n    subScalar(s) {\n      this.x -= s;\n      this.y -= s;\n      this.z -= s;\n      return this;\n    }\n    /**\n     * Subtracts the given vectors and stores the result in this instance.\n     *\n     * @param {Vector3} a - The first vector.\n     * @param {Vector3} b - The second vector.\n     * @return {Vector3} A reference to this vector.\n     */\n    subVectors(a, b) {\n      this.x = a.x - b.x;\n      this.y = a.y - b.y;\n      this.z = a.z - b.z;\n      return this;\n    }\n    /**\n     * Multiplies the given vector with this instance.\n     *\n     * @param {Vector3} v - The vector to multiply.\n     * @return {Vector3} A reference to this vector.\n     */\n    multiply(v) {\n      this.x *= v.x;\n      this.y *= v.y;\n      this.z *= v.z;\n      return this;\n    }\n    /**\n     * Multiplies the given scalar value with all components of this instance.\n     *\n     * @param {number} scalar - The scalar to multiply.\n     * @return {Vector3} A reference to this vector.\n     */\n    multiplyScalar(scalar) {\n      this.x *= scalar;\n      this.y *= scalar;\n      this.z *= scalar;\n      return this;\n    }\n    /**\n     * Multiplies the given vectors and stores the result in this instance.\n     *\n     * @param {Vector3} a - The first vector.\n     * @param {Vector3} b - The second vector.\n     * @return {Vector3} A reference to this vector.\n     */\n    multiplyVectors(a, b) {\n      this.x = a.x * b.x;\n      this.y = a.y * b.y;\n      this.z = a.z * b.z;\n      return this;\n    }\n    /**\n     * Applies the given Euler rotation to this vector.\n     *\n     * @param {Euler} euler - The Euler angles.\n     * @return {Vector3} A reference to this vector.\n     */\n    applyEuler(euler) {\n      return this.applyQuaternion(_quaternion$4.setFromEuler(euler));\n    }\n    /**\n     * Applies a rotation specified by an axis and an angle to this vector.\n     *\n     * @param {Vector3} axis - A normalized vector representing the rotation axis.\n     * @param {number} angle - The angle in radians.\n     * @return {Vector3} A reference to this vector.\n     */\n    applyAxisAngle(axis, angle) {\n      return this.applyQuaternion(_quaternion$4.setFromAxisAngle(axis, angle));\n    }\n    /**\n     * Multiplies this vector with the given 3x3 matrix.\n     *\n     * @param {Matrix3} m - The 3x3 matrix.\n     * @return {Vector3} A reference to this vector.\n     */\n    applyMatrix3(m) {\n      const x2 = this.x, y = this.y, z = this.z;\n      const e = m.elements;\n      this.x = e[0] * x2 + e[3] * y + e[6] * z;\n      this.y = e[1] * x2 + e[4] * y + e[7] * z;\n      this.z = e[2] * x2 + e[5] * y + e[8] * z;\n      return this;\n    }\n    /**\n     * Multiplies this vector by the given normal matrix and normalizes\n     * the result.\n     *\n     * @param {Matrix3} m - The normal matrix.\n     * @return {Vector3} A reference to this vector.\n     */\n    applyNormalMatrix(m) {\n      return this.applyMatrix3(m).normalize();\n    }\n    /**\n     * Multiplies this vector (with an implicit 1 in the 4th dimension) by m, and\n     * divides by perspective.\n     *\n     * @param {Matrix4} m - The matrix to apply.\n     * @return {Vector3} A reference to this vector.\n     */\n    applyMatrix4(m) {\n      const x2 = this.x, y = this.y, z = this.z;\n      const e = m.elements;\n      const w = 1 / (e[3] * x2 + e[7] * y + e[11] * z + e[15]);\n      this.x = (e[0] * x2 + e[4] * y + e[8] * z + e[12]) * w;\n      this.y = (e[1] * x2 + e[5] * y + e[9] * z + e[13]) * w;\n      this.z = (e[2] * x2 + e[6] * y + e[10] * z + e[14]) * w;\n      return this;\n    }\n    /**\n     * Applies the given Quaternion to this vector.\n     *\n     * @param {Quaternion} q - The Quaternion.\n     * @return {Vector3} A reference to this vector.\n     */\n    applyQuaternion(q) {\n      const vx = this.x, vy = this.y, vz = this.z;\n      const qx = q.x, qy = q.y, qz = q.z, qw = q.w;\n      const tx = 2 * (qy * vz - qz * vy);\n      const ty = 2 * (qz * vx - qx * vz);\n      const tz = 2 * (qx * vy - qy * vx);\n      this.x = vx + qw * tx + qy * tz - qz * ty;\n      this.y = vy + qw * ty + qz * tx - qx * tz;\n      this.z = vz + qw * tz + qx * ty - qy * tx;\n      return this;\n    }\n    /**\n     * Projects this vector from world space into the camera\'s normalized\n     * device coordinate (NDC) space.\n     *\n     * @param {Camera} camera - The camera.\n     * @return {Vector3} A reference to this vector.\n     */\n    project(camera) {\n      return this.applyMatrix4(camera.matrixWorldInverse).applyMatrix4(camera.projectionMatrix);\n    }\n    /**\n     * Unprojects this vector from the camera\'s normalized device coordinate (NDC)\n     * space into world space.\n     *\n     * @param {Camera} camera - The camera.\n     * @return {Vector3} A reference to this vector.\n     */\n    unproject(camera) {\n      return this.applyMatrix4(camera.projectionMatrixInverse).applyMatrix4(camera.matrixWorld);\n    }\n    /**\n     * Transforms the direction of this vector by a matrix (the upper left 3 x 3\n     * subset of the given 4x4 matrix and then normalizes the result.\n     *\n     * @param {Matrix4} m - The matrix.\n     * @return {Vector3} A reference to this vector.\n     */\n    transformDirection(m) {\n      const x2 = this.x, y = this.y, z = this.z;\n      const e = m.elements;\n      this.x = e[0] * x2 + e[4] * y + e[8] * z;\n      this.y = e[1] * x2 + e[5] * y + e[9] * z;\n      this.z = e[2] * x2 + e[6] * y + e[10] * z;\n      return this.normalize();\n    }\n    /**\n     * Divides this instance by the given vector.\n     *\n     * @param {Vector3} v - The vector to divide.\n     * @return {Vector3} A reference to this vector.\n     */\n    divide(v) {\n      this.x /= v.x;\n      this.y /= v.y;\n      this.z /= v.z;\n      return this;\n    }\n    /**\n     * Divides this vector by the given scalar.\n     *\n     * @param {number} scalar - The scalar to divide.\n     * @return {Vector3} A reference to this vector.\n     */\n    divideScalar(scalar) {\n      return this.multiplyScalar(1 / scalar);\n    }\n    /**\n     * If this vector\'s x, y or z value is greater than the given vector\'s x, y or z\n     * value, replace that value with the corresponding min value.\n     *\n     * @param {Vector3} v - The vector.\n     * @return {Vector3} A reference to this vector.\n     */\n    min(v) {\n      this.x = Math.min(this.x, v.x);\n      this.y = Math.min(this.y, v.y);\n      this.z = Math.min(this.z, v.z);\n      return this;\n    }\n    /**\n     * If this vector\'s x, y or z value is less than the given vector\'s x, y or z\n     * value, replace that value with the corresponding max value.\n     *\n     * @param {Vector3} v - The vector.\n     * @return {Vector3} A reference to this vector.\n     */\n    max(v) {\n      this.x = Math.max(this.x, v.x);\n      this.y = Math.max(this.y, v.y);\n      this.z = Math.max(this.z, v.z);\n      return this;\n    }\n    /**\n     * If this vector\'s x, y or z value is greater than the max vector\'s x, y or z\n     * value, it is replaced by the corresponding value.\n     * If this vector\'s x, y or z value is less than the min vector\'s x, y or z value,\n     * it is replaced by the corresponding value.\n     *\n     * @param {Vector3} min - The minimum x, y and z values.\n     * @param {Vector3} max - The maximum x, y and z values in the desired range.\n     * @return {Vector3} A reference to this vector.\n     */\n    clamp(min, max2) {\n      this.x = clamp(this.x, min.x, max2.x);\n      this.y = clamp(this.y, min.y, max2.y);\n      this.z = clamp(this.z, min.z, max2.z);\n      return this;\n    }\n    /**\n     * If this vector\'s x, y or z values are greater than the max value, they are\n     * replaced by the max value.\n     * If this vector\'s x, y or z values are less than the min value, they are\n     * replaced by the min value.\n     *\n     * @param {number} minVal - The minimum value the components will be clamped to.\n     * @param {number} maxVal - The maximum value the components will be clamped to.\n     * @return {Vector3} A reference to this vector.\n     */\n    clampScalar(minVal, maxVal) {\n      this.x = clamp(this.x, minVal, maxVal);\n      this.y = clamp(this.y, minVal, maxVal);\n      this.z = clamp(this.z, minVal, maxVal);\n      return this;\n    }\n    /**\n     * If this vector\'s length is greater than the max value, it is replaced by\n     * the max value.\n     * If this vector\'s length is less than the min value, it is replaced by the\n     * min value.\n     *\n     * @param {number} min - The minimum value the vector length will be clamped to.\n     * @param {number} max - The maximum value the vector length will be clamped to.\n     * @return {Vector3} A reference to this vector.\n     */\n    clampLength(min, max2) {\n      const length = this.length();\n      return this.divideScalar(length || 1).multiplyScalar(clamp(length, min, max2));\n    }\n    /**\n     * The components of this vector are rounded down to the nearest integer value.\n     *\n     * @return {Vector3} A reference to this vector.\n     */\n    floor() {\n      this.x = Math.floor(this.x);\n      this.y = Math.floor(this.y);\n      this.z = Math.floor(this.z);\n      return this;\n    }\n    /**\n     * The components of this vector are rounded up to the nearest integer value.\n     *\n     * @return {Vector3} A reference to this vector.\n     */\n    ceil() {\n      this.x = Math.ceil(this.x);\n      this.y = Math.ceil(this.y);\n      this.z = Math.ceil(this.z);\n      return this;\n    }\n    /**\n     * The components of this vector are rounded to the nearest integer value\n     *\n     * @return {Vector3} A reference to this vector.\n     */\n    round() {\n      this.x = Math.round(this.x);\n      this.y = Math.round(this.y);\n      this.z = Math.round(this.z);\n      return this;\n    }\n    /**\n     * The components of this vector are rounded towards zero (up if negative,\n     * down if positive) to an integer value.\n     *\n     * @return {Vector3} A reference to this vector.\n     */\n    roundToZero() {\n      this.x = Math.trunc(this.x);\n      this.y = Math.trunc(this.y);\n      this.z = Math.trunc(this.z);\n      return this;\n    }\n    /**\n     * Inverts this vector - i.e. sets x = -x, y = -y and z = -z.\n     *\n     * @return {Vector3} A reference to this vector.\n     */\n    negate() {\n      this.x = -this.x;\n      this.y = -this.y;\n      this.z = -this.z;\n      return this;\n    }\n    /**\n     * Calculates the dot product of the given vector with this instance.\n     *\n     * @param {Vector3} v - The vector to compute the dot product with.\n     * @return {number} The result of the dot product.\n     */\n    dot(v) {\n      return this.x * v.x + this.y * v.y + this.z * v.z;\n    }\n    // TODO lengthSquared?\n    /**\n     * Computes the square of the Euclidean length (straight-line length) from\n     * (0, 0, 0) to (x, y, z). If you are comparing the lengths of vectors, you should\n     * compare the length squared instead as it is slightly more efficient to calculate.\n     *\n     * @return {number} The square length of this vector.\n     */\n    lengthSq() {\n      return this.x * this.x + this.y * this.y + this.z * this.z;\n    }\n    /**\n     * Computes the  Euclidean length (straight-line length) from (0, 0, 0) to (x, y, z).\n     *\n     * @return {number} The length of this vector.\n     */\n    length() {\n      return Math.sqrt(this.x * this.x + this.y * this.y + this.z * this.z);\n    }\n    /**\n     * Computes the Manhattan length of this vector.\n     *\n     * @return {number} The length of this vector.\n     */\n    manhattanLength() {\n      return Math.abs(this.x) + Math.abs(this.y) + Math.abs(this.z);\n    }\n    /**\n     * Converts this vector to a unit vector - that is, sets it equal to a vector\n     * with the same direction as this one, but with a vector length of `1`.\n     *\n     * @return {Vector3} A reference to this vector.\n     */\n    normalize() {\n      return this.divideScalar(this.length() || 1);\n    }\n    /**\n     * Sets this vector to a vector with the same direction as this one, but\n     * with the specified length.\n     *\n     * @param {number} length - The new length of this vector.\n     * @return {Vector3} A reference to this vector.\n     */\n    setLength(length) {\n      return this.normalize().multiplyScalar(length);\n    }\n    /**\n     * Linearly interpolates between the given vector and this instance, where\n     * alpha is the percent distance along the line - alpha = 0 will be this\n     * vector, and alpha = 1 will be the given one.\n     *\n     * @param {Vector3} v - The vector to interpolate towards.\n     * @param {number} alpha - The interpolation factor, typically in the closed interval `[0, 1]`.\n     * @return {Vector3} A reference to this vector.\n     */\n    lerp(v, alpha) {\n      this.x += (v.x - this.x) * alpha;\n      this.y += (v.y - this.y) * alpha;\n      this.z += (v.z - this.z) * alpha;\n      return this;\n    }\n    /**\n     * Linearly interpolates between the given vectors, where alpha is the percent\n     * distance along the line - alpha = 0 will be first vector, and alpha = 1 will\n     * be the second one. The result is stored in this instance.\n     *\n     * @param {Vector3} v1 - The first vector.\n     * @param {Vector3} v2 - The second vector.\n     * @param {number} alpha - The interpolation factor, typically in the closed interval `[0, 1]`.\n     * @return {Vector3} A reference to this vector.\n     */\n    lerpVectors(v1, v2, alpha) {\n      this.x = v1.x + (v2.x - v1.x) * alpha;\n      this.y = v1.y + (v2.y - v1.y) * alpha;\n      this.z = v1.z + (v2.z - v1.z) * alpha;\n      return this;\n    }\n    /**\n     * Calculates the cross product of the given vector with this instance.\n     *\n     * @param {Vector3} v - The vector to compute the cross product with.\n     * @return {Vector3} The result of the cross product.\n     */\n    cross(v) {\n      return this.crossVectors(this, v);\n    }\n    /**\n     * Calculates the cross product of the given vectors and stores the result\n     * in this instance.\n     *\n     * @param {Vector3} a - The first vector.\n     * @param {Vector3} b - The second vector.\n     * @return {Vector3} A reference to this vector.\n     */\n    crossVectors(a, b) {\n      const ax = a.x, ay = a.y, az = a.z;\n      const bx = b.x, by = b.y, bz = b.z;\n      this.x = ay * bz - az * by;\n      this.y = az * bx - ax * bz;\n      this.z = ax * by - ay * bx;\n      return this;\n    }\n    /**\n     * Projects this vector onto the given one.\n     *\n     * @param {Vector3} v - The vector to project to.\n     * @return {Vector3} A reference to this vector.\n     */\n    projectOnVector(v) {\n      const denominator = v.lengthSq();\n      if (denominator === 0) return this.set(0, 0, 0);\n      const scalar = v.dot(this) / denominator;\n      return this.copy(v).multiplyScalar(scalar);\n    }\n    /**\n     * Projects this vector onto a plane by subtracting this\n     * vector projected onto the plane\'s normal from this vector.\n     *\n     * @param {Vector3} planeNormal - The plane normal.\n     * @return {Vector3} A reference to this vector.\n     */\n    projectOnPlane(planeNormal) {\n      _vector$c.copy(this).projectOnVector(planeNormal);\n      return this.sub(_vector$c);\n    }\n    /**\n     * Reflects this vector off a plane orthogonal to the given normal vector.\n     *\n     * @param {Vector3} normal - The (normalized) normal vector.\n     * @return {Vector3} A reference to this vector.\n     */\n    reflect(normal) {\n      return this.sub(_vector$c.copy(normal).multiplyScalar(2 * this.dot(normal)));\n    }\n    /**\n     * Returns the angle between the given vector and this instance in radians.\n     *\n     * @param {Vector3} v - The vector to compute the angle with.\n     * @return {number} The angle in radians.\n     */\n    angleTo(v) {\n      const denominator = Math.sqrt(this.lengthSq() * v.lengthSq());\n      if (denominator === 0) return Math.PI / 2;\n      const theta = this.dot(v) / denominator;\n      return Math.acos(clamp(theta, -1, 1));\n    }\n    /**\n     * Computes the distance from the given vector to this instance.\n     *\n     * @param {Vector3} v - The vector to compute the distance to.\n     * @return {number} The distance.\n     */\n    distanceTo(v) {\n      return Math.sqrt(this.distanceToSquared(v));\n    }\n    /**\n     * Computes the squared distance from the given vector to this instance.\n     * If you are just comparing the distance with another distance, you should compare\n     * the distance squared instead as it is slightly more efficient to calculate.\n     *\n     * @param {Vector3} v - The vector to compute the squared distance to.\n     * @return {number} The squared distance.\n     */\n    distanceToSquared(v) {\n      const dx = this.x - v.x, dy = this.y - v.y, dz = this.z - v.z;\n      return dx * dx + dy * dy + dz * dz;\n    }\n    /**\n     * Computes the Manhattan distance from the given vector to this instance.\n     *\n     * @param {Vector3} v - The vector to compute the Manhattan distance to.\n     * @return {number} The Manhattan distance.\n     */\n    manhattanDistanceTo(v) {\n      return Math.abs(this.x - v.x) + Math.abs(this.y - v.y) + Math.abs(this.z - v.z);\n    }\n    /**\n     * Sets the vector components from the given spherical coordinates.\n     *\n     * @param {Spherical} s - The spherical coordinates.\n     * @return {Vector3} A reference to this vector.\n     */\n    setFromSpherical(s) {\n      return this.setFromSphericalCoords(s.radius, s.phi, s.theta);\n    }\n    /**\n     * Sets the vector components from the given spherical coordinates.\n     *\n     * @param {number} radius - The radius.\n     * @param {number} phi - The phi angle in radians.\n     * @param {number} theta - The theta angle in radians.\n     * @return {Vector3} A reference to this vector.\n     */\n    setFromSphericalCoords(radius, phi, theta) {\n      const sinPhiRadius = Math.sin(phi) * radius;\n      this.x = sinPhiRadius * Math.sin(theta);\n      this.y = Math.cos(phi) * radius;\n      this.z = sinPhiRadius * Math.cos(theta);\n      return this;\n    }\n    /**\n     * Sets the vector components from the given cylindrical coordinates.\n     *\n     * @param {Cylindrical} c - The cylindrical coordinates.\n     * @return {Vector3} A reference to this vector.\n     */\n    setFromCylindrical(c) {\n      return this.setFromCylindricalCoords(c.radius, c.theta, c.y);\n    }\n    /**\n     * Sets the vector components from the given cylindrical coordinates.\n     *\n     * @param {number} radius - The radius.\n     * @param {number} theta - The theta angle in radians.\n     * @param {number} y - The y value.\n     * @return {Vector3} A reference to this vector.\n     */\n    setFromCylindricalCoords(radius, theta, y) {\n      this.x = radius * Math.sin(theta);\n      this.y = y;\n      this.z = radius * Math.cos(theta);\n      return this;\n    }\n    /**\n     * Sets the vector components to the position elements of the\n     * given transformation matrix.\n     *\n     * @param {Matrix4} m - The 4x4 matrix.\n     * @return {Vector3} A reference to this vector.\n     */\n    setFromMatrixPosition(m) {\n      const e = m.elements;\n      this.x = e[12];\n      this.y = e[13];\n      this.z = e[14];\n      return this;\n    }\n    /**\n     * Sets the vector components to the scale elements of the\n     * given transformation matrix.\n     *\n     * @param {Matrix4} m - The 4x4 matrix.\n     * @return {Vector3} A reference to this vector.\n     */\n    setFromMatrixScale(m) {\n      const sx = this.setFromMatrixColumn(m, 0).length();\n      const sy = this.setFromMatrixColumn(m, 1).length();\n      const sz = this.setFromMatrixColumn(m, 2).length();\n      this.x = sx;\n      this.y = sy;\n      this.z = sz;\n      return this;\n    }\n    /**\n     * Sets the vector components from the specified matrix column.\n     *\n     * @param {Matrix4} m - The 4x4 matrix.\n     * @param {number} index - The column index.\n     * @return {Vector3} A reference to this vector.\n     */\n    setFromMatrixColumn(m, index) {\n      return this.fromArray(m.elements, index * 4);\n    }\n    /**\n     * Sets the vector components from the specified matrix column.\n     *\n     * @param {Matrix3} m - The 3x3 matrix.\n     * @param {number} index - The column index.\n     * @return {Vector3} A reference to this vector.\n     */\n    setFromMatrix3Column(m, index) {\n      return this.fromArray(m.elements, index * 3);\n    }\n    /**\n     * Sets the vector components from the given Euler angles.\n     *\n     * @param {Euler} e - The Euler angles to set.\n     * @return {Vector3} A reference to this vector.\n     */\n    setFromEuler(e) {\n      this.x = e._x;\n      this.y = e._y;\n      this.z = e._z;\n      return this;\n    }\n    /**\n     * Sets the vector components from the RGB components of the\n     * given color.\n     *\n     * @param {Color} c - The color to set.\n     * @return {Vector3} A reference to this vector.\n     */\n    setFromColor(c) {\n      this.x = c.r;\n      this.y = c.g;\n      this.z = c.b;\n      return this;\n    }\n    /**\n     * Returns `true` if this vector is equal with the given one.\n     *\n     * @param {Vector3} v - The vector to test for equality.\n     * @return {boolean} Whether this vector is equal with the given one.\n     */\n    equals(v) {\n      return v.x === this.x && v.y === this.y && v.z === this.z;\n    }\n    /**\n     * Sets this vector\'s x value to be `array[ offset ]`, y value to be `array[ offset + 1 ]`\n     * and z value to be `array[ offset + 2 ]`.\n     *\n     * @param {Array<number>} array - An array holding the vector component values.\n     * @param {number} [offset=0] - The offset into the array.\n     * @return {Vector3} A reference to this vector.\n     */\n    fromArray(array, offset = 0) {\n      this.x = array[offset];\n      this.y = array[offset + 1];\n      this.z = array[offset + 2];\n      return this;\n    }\n    /**\n     * Writes the components of this vector to the given array. If no array is provided,\n     * the method returns a new instance.\n     *\n     * @param {Array<number>} [array=[]] - The target array holding the vector components.\n     * @param {number} [offset=0] - Index of the first element in the array.\n     * @return {Array<number>} The vector components.\n     */\n    toArray(array = [], offset = 0) {\n      array[offset] = this.x;\n      array[offset + 1] = this.y;\n      array[offset + 2] = this.z;\n      return array;\n    }\n    /**\n     * Sets the components of this vector from the given buffer attribute.\n     *\n     * @param {BufferAttribute} attribute - The buffer attribute holding vector data.\n     * @param {number} index - The index into the attribute.\n     * @return {Vector3} A reference to this vector.\n     */\n    fromBufferAttribute(attribute, index) {\n      this.x = attribute.getX(index);\n      this.y = attribute.getY(index);\n      this.z = attribute.getZ(index);\n      return this;\n    }\n    /**\n     * Sets each component of this vector to a pseudo-random value between `0` and\n     * `1`, excluding `1`.\n     *\n     * @return {Vector3} A reference to this vector.\n     */\n    random() {\n      this.x = Math.random();\n      this.y = Math.random();\n      this.z = Math.random();\n      return this;\n    }\n    /**\n     * Sets this vector to a uniformly random point on a unit sphere.\n     *\n     * @return {Vector3} A reference to this vector.\n     */\n    randomDirection() {\n      const theta = Math.random() * Math.PI * 2;\n      const u = Math.random() * 2 - 1;\n      const c = Math.sqrt(1 - u * u);\n      this.x = c * Math.cos(theta);\n      this.y = u;\n      this.z = c * Math.sin(theta);\n      return this;\n    }\n    *[Symbol.iterator]() {\n      yield this.x;\n      yield this.y;\n      yield this.z;\n    }\n  }\n  const _vector$c = /* @__PURE__ */ new Vector3();\n  const _quaternion$4 = /* @__PURE__ */ new Quaternion();\n  class Matrix3 {\n    /**\n     * Constructs a new 3x3 matrix. The arguments are supposed to be\n     * in row-major order. If no arguments are provided, the constructor\n     * initializes the matrix as an identity matrix.\n     *\n     * @param {number} [n11] - 1-1 matrix element.\n     * @param {number} [n12] - 1-2 matrix element.\n     * @param {number} [n13] - 1-3 matrix element.\n     * @param {number} [n21] - 2-1 matrix element.\n     * @param {number} [n22] - 2-2 matrix element.\n     * @param {number} [n23] - 2-3 matrix element.\n     * @param {number} [n31] - 3-1 matrix element.\n     * @param {number} [n32] - 3-2 matrix element.\n     * @param {number} [n33] - 3-3 matrix element.\n     */\n    constructor(n11, n12, n13, n21, n22, n23, n31, n32, n33) {\n      Matrix3.prototype.isMatrix3 = true;\n      this.elements = [\n        1,\n        0,\n        0,\n        0,\n        1,\n        0,\n        0,\n        0,\n        1\n      ];\n      if (n11 !== void 0) {\n        this.set(n11, n12, n13, n21, n22, n23, n31, n32, n33);\n      }\n    }\n    /**\n     * Sets the elements of the matrix.The arguments are supposed to be\n     * in row-major order.\n     *\n     * @param {number} [n11] - 1-1 matrix element.\n     * @param {number} [n12] - 1-2 matrix element.\n     * @param {number} [n13] - 1-3 matrix element.\n     * @param {number} [n21] - 2-1 matrix element.\n     * @param {number} [n22] - 2-2 matrix element.\n     * @param {number} [n23] - 2-3 matrix element.\n     * @param {number} [n31] - 3-1 matrix element.\n     * @param {number} [n32] - 3-2 matrix element.\n     * @param {number} [n33] - 3-3 matrix element.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    set(n11, n12, n13, n21, n22, n23, n31, n32, n33) {\n      const te = this.elements;\n      te[0] = n11;\n      te[1] = n21;\n      te[2] = n31;\n      te[3] = n12;\n      te[4] = n22;\n      te[5] = n32;\n      te[6] = n13;\n      te[7] = n23;\n      te[8] = n33;\n      return this;\n    }\n    /**\n     * Sets this matrix to the 3x3 identity matrix.\n     *\n     * @return {Matrix3} A reference to this matrix.\n     */\n    identity() {\n      this.set(\n        1,\n        0,\n        0,\n        0,\n        1,\n        0,\n        0,\n        0,\n        1\n      );\n      return this;\n    }\n    /**\n     * Copies the values of the given matrix to this instance.\n     *\n     * @param {Matrix3} m - The matrix to copy.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    copy(m) {\n      const te = this.elements;\n      const me = m.elements;\n      te[0] = me[0];\n      te[1] = me[1];\n      te[2] = me[2];\n      te[3] = me[3];\n      te[4] = me[4];\n      te[5] = me[5];\n      te[6] = me[6];\n      te[7] = me[7];\n      te[8] = me[8];\n      return this;\n    }\n    /**\n     * Extracts the basis of this matrix into the three axis vectors provided.\n     *\n     * @param {Vector3} xAxis - The basis\'s x axis.\n     * @param {Vector3} yAxis - The basis\'s y axis.\n     * @param {Vector3} zAxis - The basis\'s z axis.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    extractBasis(xAxis, yAxis, zAxis) {\n      xAxis.setFromMatrix3Column(this, 0);\n      yAxis.setFromMatrix3Column(this, 1);\n      zAxis.setFromMatrix3Column(this, 2);\n      return this;\n    }\n    /**\n     * Set this matrix to the upper 3x3 matrix of the given 4x4 matrix.\n     *\n     * @param {Matrix4} m - The 4x4 matrix.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    setFromMatrix4(m) {\n      const me = m.elements;\n      this.set(\n        me[0],\n        me[4],\n        me[8],\n        me[1],\n        me[5],\n        me[9],\n        me[2],\n        me[6],\n        me[10]\n      );\n      return this;\n    }\n    /**\n     * Post-multiplies this matrix by the given 3x3 matrix.\n     *\n     * @param {Matrix3} m - The matrix to multiply with.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    multiply(m) {\n      return this.multiplyMatrices(this, m);\n    }\n    /**\n     * Pre-multiplies this matrix by the given 3x3 matrix.\n     *\n     * @param {Matrix3} m - The matrix to multiply with.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    premultiply(m) {\n      return this.multiplyMatrices(m, this);\n    }\n    /**\n     * Multiples the given 3x3 matrices and stores the result\n     * in this matrix.\n     *\n     * @param {Matrix3} a - The first matrix.\n     * @param {Matrix3} b - The second matrix.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    multiplyMatrices(a, b) {\n      const ae = a.elements;\n      const be = b.elements;\n      const te = this.elements;\n      const a11 = ae[0], a12 = ae[3], a13 = ae[6];\n      const a21 = ae[1], a22 = ae[4], a23 = ae[7];\n      const a31 = ae[2], a32 = ae[5], a33 = ae[8];\n      const b11 = be[0], b12 = be[3], b13 = be[6];\n      const b21 = be[1], b22 = be[4], b23 = be[7];\n      const b31 = be[2], b32 = be[5], b33 = be[8];\n      te[0] = a11 * b11 + a12 * b21 + a13 * b31;\n      te[3] = a11 * b12 + a12 * b22 + a13 * b32;\n      te[6] = a11 * b13 + a12 * b23 + a13 * b33;\n      te[1] = a21 * b11 + a22 * b21 + a23 * b31;\n      te[4] = a21 * b12 + a22 * b22 + a23 * b32;\n      te[7] = a21 * b13 + a22 * b23 + a23 * b33;\n      te[2] = a31 * b11 + a32 * b21 + a33 * b31;\n      te[5] = a31 * b12 + a32 * b22 + a33 * b32;\n      te[8] = a31 * b13 + a32 * b23 + a33 * b33;\n      return this;\n    }\n    /**\n     * Multiplies every component of the matrix by the given scalar.\n     *\n     * @param {number} s - The scalar.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    multiplyScalar(s) {\n      const te = this.elements;\n      te[0] *= s;\n      te[3] *= s;\n      te[6] *= s;\n      te[1] *= s;\n      te[4] *= s;\n      te[7] *= s;\n      te[2] *= s;\n      te[5] *= s;\n      te[8] *= s;\n      return this;\n    }\n    /**\n     * Computes and returns the determinant of this matrix.\n     *\n     * @return {number} The determinant.\n     */\n    determinant() {\n      const te = this.elements;\n      const a = te[0], b = te[1], c = te[2], d = te[3], e = te[4], f = te[5], g = te[6], h = te[7], i2 = te[8];\n      return a * e * i2 - a * f * h - b * d * i2 + b * f * g + c * d * h - c * e * g;\n    }\n    /**\n     * Inverts this matrix, using the [analytic method]{@link https://en.wikipedia.org/wiki/Invertible_matrix#Analytic_solution}.\n     * You can not invert with a determinant of zero. If you attempt this, the method produces\n     * a zero matrix instead.\n     *\n     * @return {Matrix3} A reference to this matrix.\n     */\n    invert() {\n      const te = this.elements, n11 = te[0], n21 = te[1], n31 = te[2], n12 = te[3], n22 = te[4], n32 = te[5], n13 = te[6], n23 = te[7], n33 = te[8], t11 = n33 * n22 - n32 * n23, t12 = n32 * n13 - n33 * n12, t13 = n23 * n12 - n22 * n13, det = n11 * t11 + n21 * t12 + n31 * t13;\n      if (det === 0) return this.set(0, 0, 0, 0, 0, 0, 0, 0, 0);\n      const detInv = 1 / det;\n      te[0] = t11 * detInv;\n      te[1] = (n31 * n23 - n33 * n21) * detInv;\n      te[2] = (n32 * n21 - n31 * n22) * detInv;\n      te[3] = t12 * detInv;\n      te[4] = (n33 * n11 - n31 * n13) * detInv;\n      te[5] = (n31 * n12 - n32 * n11) * detInv;\n      te[6] = t13 * detInv;\n      te[7] = (n21 * n13 - n23 * n11) * detInv;\n      te[8] = (n22 * n11 - n21 * n12) * detInv;\n      return this;\n    }\n    /**\n     * Transposes this matrix in place.\n     *\n     * @return {Matrix3} A reference to this matrix.\n     */\n    transpose() {\n      let tmp;\n      const m = this.elements;\n      tmp = m[1];\n      m[1] = m[3];\n      m[3] = tmp;\n      tmp = m[2];\n      m[2] = m[6];\n      m[6] = tmp;\n      tmp = m[5];\n      m[5] = m[7];\n      m[7] = tmp;\n      return this;\n    }\n    /**\n     * Computes the normal matrix which is the inverse transpose of the upper\n     * left 3x3 portion of the given 4x4 matrix.\n     *\n     * @param {Matrix4} matrix4 - The 4x4 matrix.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    getNormalMatrix(matrix4) {\n      return this.setFromMatrix4(matrix4).invert().transpose();\n    }\n    /**\n     * Transposes this matrix into the supplied array, and returns itself unchanged.\n     *\n     * @param {Array<number>} r - An array to store the transposed matrix elements.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    transposeIntoArray(r) {\n      const m = this.elements;\n      r[0] = m[0];\n      r[1] = m[3];\n      r[2] = m[6];\n      r[3] = m[1];\n      r[4] = m[4];\n      r[5] = m[7];\n      r[6] = m[2];\n      r[7] = m[5];\n      r[8] = m[8];\n      return this;\n    }\n    /**\n     * Sets the UV transform matrix from offset, repeat, rotation, and center.\n     *\n     * @param {number} tx - Offset x.\n     * @param {number} ty - Offset y.\n     * @param {number} sx - Repeat x.\n     * @param {number} sy - Repeat y.\n     * @param {number} rotation - Rotation, in radians. Positive values rotate counterclockwise.\n     * @param {number} cx - Center x of rotation.\n     * @param {number} cy - Center y of rotation\n     * @return {Matrix3} A reference to this matrix.\n     */\n    setUvTransform(tx, ty, sx, sy, rotation, cx, cy) {\n      const c = Math.cos(rotation);\n      const s = Math.sin(rotation);\n      this.set(\n        sx * c,\n        sx * s,\n        -sx * (c * cx + s * cy) + cx + tx,\n        -sy * s,\n        sy * c,\n        -sy * (-s * cx + c * cy) + cy + ty,\n        0,\n        0,\n        1\n      );\n      return this;\n    }\n    /**\n     * Scales this matrix with the given scalar values.\n     *\n     * @param {number} sx - The amount to scale in the X axis.\n     * @param {number} sy - The amount to scale in the Y axis.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    scale(sx, sy) {\n      this.premultiply(_m3.makeScale(sx, sy));\n      return this;\n    }\n    /**\n     * Rotates this matrix by the given angle.\n     *\n     * @param {number} theta - The rotation in radians.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    rotate(theta) {\n      this.premultiply(_m3.makeRotation(-theta));\n      return this;\n    }\n    /**\n     * Translates this matrix by the given scalar values.\n     *\n     * @param {number} tx - The amount to translate in the X axis.\n     * @param {number} ty - The amount to translate in the Y axis.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    translate(tx, ty) {\n      this.premultiply(_m3.makeTranslation(tx, ty));\n      return this;\n    }\n    // for 2D Transforms\n    /**\n     * Sets this matrix as a 2D translation transform.\n     *\n     * @param {number|Vector2} x - The amount to translate in the X axis or alternatively a translation vector.\n     * @param {number} y - The amount to translate in the Y axis.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    makeTranslation(x2, y) {\n      if (x2.isVector2) {\n        this.set(\n          1,\n          0,\n          x2.x,\n          0,\n          1,\n          x2.y,\n          0,\n          0,\n          1\n        );\n      } else {\n        this.set(\n          1,\n          0,\n          x2,\n          0,\n          1,\n          y,\n          0,\n          0,\n          1\n        );\n      }\n      return this;\n    }\n    /**\n     * Sets this matrix as a 2D rotational transformation.\n     *\n     * @param {number} theta - The rotation in radians.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    makeRotation(theta) {\n      const c = Math.cos(theta);\n      const s = Math.sin(theta);\n      this.set(\n        c,\n        -s,\n        0,\n        s,\n        c,\n        0,\n        0,\n        0,\n        1\n      );\n      return this;\n    }\n    /**\n     * Sets this matrix as a 2D scale transform.\n     *\n     * @param {number} x - The amount to scale in the X axis.\n     * @param {number} y - The amount to scale in the Y axis.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    makeScale(x2, y) {\n      this.set(\n        x2,\n        0,\n        0,\n        0,\n        y,\n        0,\n        0,\n        0,\n        1\n      );\n      return this;\n    }\n    /**\n     * Returns `true` if this matrix is equal with the given one.\n     *\n     * @param {Matrix3} matrix - The matrix to test for equality.\n     * @return {boolean} Whether this matrix is equal with the given one.\n     */\n    equals(matrix) {\n      const te = this.elements;\n      const me = matrix.elements;\n      for (let i2 = 0; i2 < 9; i2++) {\n        if (te[i2] !== me[i2]) return false;\n      }\n      return true;\n    }\n    /**\n     * Sets the elements of the matrix from the given array.\n     *\n     * @param {Array<number>} array - The matrix elements in column-major order.\n     * @param {number} [offset=0] - Index of the first element in the array.\n     * @return {Matrix3} A reference to this matrix.\n     */\n    fromArray(array, offset = 0) {\n      for (let i2 = 0; i2 < 9; i2++) {\n        this.elements[i2] = array[i2 + offset];\n      }\n      return this;\n    }\n    /**\n     * Writes the elements of this matrix to the given array. If no array is provided,\n     * the method returns a new instance.\n     *\n     * @param {Array<number>} [array=[]] - The target array holding the matrix elements in column-major order.\n     * @param {number} [offset=0] - Index of the first element in the array.\n     * @return {Array<number>} The matrix elements in column-major order.\n     */\n    toArray(array = [], offset = 0) {\n      const te = this.elements;\n      array[offset] = te[0];\n      array[offset + 1] = te[1];\n      array[offset + 2] = te[2];\n      array[offset + 3] = te[3];\n      array[offset + 4] = te[4];\n      array[offset + 5] = te[5];\n      array[offset + 6] = te[6];\n      array[offset + 7] = te[7];\n      array[offset + 8] = te[8];\n      return array;\n    }\n    /**\n     * Returns a matrix with copied values from this instance.\n     *\n     * @return {Matrix3} A clone of this instance.\n     */\n    clone() {\n      return new this.constructor().fromArray(this.elements);\n    }\n  }\n  const _m3 = /* @__PURE__ */ new Matrix3();\n  const _cache = {};\n  function warnOnce(message) {\n    if (message in _cache) return;\n    _cache[message] = true;\n    console.warn(message);\n  }\n  const LINEAR_REC709_TO_XYZ = /* @__PURE__ */ new Matrix3().set(\n    0.4123908,\n    0.3575843,\n    0.1804808,\n    0.212639,\n    0.7151687,\n    0.0721923,\n    0.0193308,\n    0.1191948,\n    0.9505322\n  );\n  const XYZ_TO_LINEAR_REC709 = /* @__PURE__ */ new Matrix3().set(\n    3.2409699,\n    -1.5373832,\n    -0.4986108,\n    -0.9692436,\n    1.8759675,\n    0.0415551,\n    0.0556301,\n    -0.203977,\n    1.0569715\n  );\n  function createColorManagement() {\n    const ColorManagement2 = {\n      enabled: true,\n      workingColorSpace: LinearSRGBColorSpace,\n      /**\n       * Implementations of supported color spaces.\n       *\n       * Required:\n       *	- primaries: chromaticity coordinates [ rx ry gx gy bx by ]\n       *	- whitePoint: reference white [ x y ]\n       *	- transfer: transfer function (pre-defined)\n       *	- toXYZ: Matrix3 RGB to XYZ transform\n       *	- fromXYZ: Matrix3 XYZ to RGB transform\n       *	- luminanceCoefficients: RGB luminance coefficients\n       *\n       * Optional:\n       *  - outputColorSpaceConfig: { drawingBufferColorSpace: ColorSpace }\n       *  - workingColorSpaceConfig: { unpackColorSpace: ColorSpace }\n       *\n       * Reference:\n       * - https://www.russellcottrell.com/photo/matrixCalculator.htm\n       */\n      spaces: {},\n      convert: function(color, sourceColorSpace, targetColorSpace) {\n        if (this.enabled === false || sourceColorSpace === targetColorSpace || !sourceColorSpace || !targetColorSpace) {\n          return color;\n        }\n        if (this.spaces[sourceColorSpace].transfer === SRGBTransfer) {\n          color.r = SRGBToLinear(color.r);\n          color.g = SRGBToLinear(color.g);\n          color.b = SRGBToLinear(color.b);\n        }\n        if (this.spaces[sourceColorSpace].primaries !== this.spaces[targetColorSpace].primaries) {\n          color.applyMatrix3(this.spaces[sourceColorSpace].toXYZ);\n          color.applyMatrix3(this.spaces[targetColorSpace].fromXYZ);\n        }\n        if (this.spaces[targetColorSpace].transfer === SRGBTransfer) {\n          color.r = LinearToSRGB(color.r);\n          color.g = LinearToSRGB(color.g);\n          color.b = LinearToSRGB(color.b);\n        }\n        return color;\n      },\n      workingToColorSpace: function(color, targetColorSpace) {\n        return this.convert(color, this.workingColorSpace, targetColorSpace);\n      },\n      colorSpaceToWorking: function(color, sourceColorSpace) {\n        return this.convert(color, sourceColorSpace, this.workingColorSpace);\n      },\n      getPrimaries: function(colorSpace) {\n        return this.spaces[colorSpace].primaries;\n      },\n      getTransfer: function(colorSpace) {\n        if (colorSpace === NoColorSpace) return LinearTransfer;\n        return this.spaces[colorSpace].transfer;\n      },\n      getLuminanceCoefficients: function(target, colorSpace = this.workingColorSpace) {\n        return target.fromArray(this.spaces[colorSpace].luminanceCoefficients);\n      },\n      define: function(colorSpaces) {\n        Object.assign(this.spaces, colorSpaces);\n      },\n      // Internal APIs\n      _getMatrix: function(targetMatrix, sourceColorSpace, targetColorSpace) {\n        return targetMatrix.copy(this.spaces[sourceColorSpace].toXYZ).multiply(this.spaces[targetColorSpace].fromXYZ);\n      },\n      _getDrawingBufferColorSpace: function(colorSpace) {\n        return this.spaces[colorSpace].outputColorSpaceConfig.drawingBufferColorSpace;\n      },\n      _getUnpackColorSpace: function(colorSpace = this.workingColorSpace) {\n        return this.spaces[colorSpace].workingColorSpaceConfig.unpackColorSpace;\n      },\n      // Deprecated\n      fromWorkingColorSpace: function(color, targetColorSpace) {\n        warnOnce("THREE.ColorManagement: .fromWorkingColorSpace() has been renamed to .workingToColorSpace().");\n        return ColorManagement2.workingToColorSpace(color, targetColorSpace);\n      },\n      toWorkingColorSpace: function(color, sourceColorSpace) {\n        warnOnce("THREE.ColorManagement: .toWorkingColorSpace() has been renamed to .colorSpaceToWorking().");\n        return ColorManagement2.colorSpaceToWorking(color, sourceColorSpace);\n      }\n    };\n    const REC709_PRIMARIES = [0.64, 0.33, 0.3, 0.6, 0.15, 0.06];\n    const REC709_LUMINANCE_COEFFICIENTS = [0.2126, 0.7152, 0.0722];\n    const D65 = [0.3127, 0.329];\n    ColorManagement2.define({\n      [LinearSRGBColorSpace]: {\n        primaries: REC709_PRIMARIES,\n        whitePoint: D65,\n        transfer: LinearTransfer,\n        toXYZ: LINEAR_REC709_TO_XYZ,\n        fromXYZ: XYZ_TO_LINEAR_REC709,\n        luminanceCoefficients: REC709_LUMINANCE_COEFFICIENTS,\n        workingColorSpaceConfig: { unpackColorSpace: SRGBColorSpace },\n        outputColorSpaceConfig: { drawingBufferColorSpace: SRGBColorSpace }\n      },\n      [SRGBColorSpace]: {\n        primaries: REC709_PRIMARIES,\n        whitePoint: D65,\n        transfer: SRGBTransfer,\n        toXYZ: LINEAR_REC709_TO_XYZ,\n        fromXYZ: XYZ_TO_LINEAR_REC709,\n        luminanceCoefficients: REC709_LUMINANCE_COEFFICIENTS,\n        outputColorSpaceConfig: { drawingBufferColorSpace: SRGBColorSpace }\n      }\n    });\n    return ColorManagement2;\n  }\n  const ColorManagement = /* @__PURE__ */ createColorManagement();\n  function SRGBToLinear(c) {\n    return c < 0.04045 ? c * 0.0773993808 : Math.pow(c * 0.9478672986 + 0.0521327014, 2.4);\n  }\n  function LinearToSRGB(c) {\n    return c < 31308e-7 ? c * 12.92 : 1.055 * Math.pow(c, 0.41666) - 0.055;\n  }\n  class Box3 {\n    /**\n     * Constructs a new bounding box.\n     *\n     * @param {Vector3} [min=(Infinity,Infinity,Infinity)] - A vector representing the lower boundary of the box.\n     * @param {Vector3} [max=(-Infinity,-Infinity,-Infinity)] - A vector representing the upper boundary of the box.\n     */\n    constructor(min = new Vector3(Infinity, Infinity, Infinity), max2 = new Vector3(-Infinity, -Infinity, -Infinity)) {\n      this.isBox3 = true;\n      this.min = min;\n      this.max = max2;\n    }\n    /**\n     * Sets the lower and upper boundaries of this box.\n     * Please note that this method only copies the values from the given objects.\n     *\n     * @param {Vector3} min - The lower boundary of the box.\n     * @param {Vector3} max - The upper boundary of the box.\n     * @return {Box3} A reference to this bounding box.\n     */\n    set(min, max2) {\n      this.min.copy(min);\n      this.max.copy(max2);\n      return this;\n    }\n    /**\n     * Sets the upper and lower bounds of this box so it encloses the position data\n     * in the given array.\n     *\n     * @param {Array<number>} array - An array holding 3D position data.\n     * @return {Box3} A reference to this bounding box.\n     */\n    setFromArray(array) {\n      this.makeEmpty();\n      for (let i2 = 0, il = array.length; i2 < il; i2 += 3) {\n        this.expandByPoint(_vector$b.fromArray(array, i2));\n      }\n      return this;\n    }\n    /**\n     * Sets the upper and lower bounds of this box so it encloses the position data\n     * in the given buffer attribute.\n     *\n     * @param {BufferAttribute} attribute - A buffer attribute holding 3D position data.\n     * @return {Box3} A reference to this bounding box.\n     */\n    setFromBufferAttribute(attribute) {\n      this.makeEmpty();\n      for (let i2 = 0, il = attribute.count; i2 < il; i2++) {\n        this.expandByPoint(_vector$b.fromBufferAttribute(attribute, i2));\n      }\n      return this;\n    }\n    /**\n     * Sets the upper and lower bounds of this box so it encloses the position data\n     * in the given array.\n     *\n     * @param {Array<Vector3>} points - An array holding 3D position data as instances of {@link Vector3}.\n     * @return {Box3} A reference to this bounding box.\n     */\n    setFromPoints(points) {\n      this.makeEmpty();\n      for (let i2 = 0, il = points.length; i2 < il; i2++) {\n        this.expandByPoint(points[i2]);\n      }\n      return this;\n    }\n    /**\n     * Centers this box on the given center vector and sets this box\'s width, height and\n     * depth to the given size values.\n     *\n     * @param {Vector3} center - The center of the box.\n     * @param {Vector3} size - The x, y and z dimensions of the box.\n     * @return {Box3} A reference to this bounding box.\n     */\n    setFromCenterAndSize(center, size) {\n      const halfSize = _vector$b.copy(size).multiplyScalar(0.5);\n      this.min.copy(center).sub(halfSize);\n      this.max.copy(center).add(halfSize);\n      return this;\n    }\n    /**\n     * Computes the world-axis-aligned bounding box for the given 3D object\n     * (including its children), accounting for the object\'s, and children\'s,\n     * world transforms. The function may result in a larger box than strictly necessary.\n     *\n     * @param {Object3D} object - The 3D object to compute the bounding box for.\n     * @param {boolean} [precise=false] - If set to `true`, the method computes the smallest\n     * world-axis-aligned bounding box at the expense of more computation.\n     * @return {Box3} A reference to this bounding box.\n     */\n    setFromObject(object, precise = false) {\n      this.makeEmpty();\n      return this.expandByObject(object, precise);\n    }\n    /**\n     * Returns a new box with copied values from this instance.\n     *\n     * @return {Box3} A clone of this instance.\n     */\n    clone() {\n      return new this.constructor().copy(this);\n    }\n    /**\n     * Copies the values of the given box to this instance.\n     *\n     * @param {Box3} box - The box to copy.\n     * @return {Box3} A reference to this bounding box.\n     */\n    copy(box) {\n      this.min.copy(box.min);\n      this.max.copy(box.max);\n      return this;\n    }\n    /**\n     * Makes this box empty which means in encloses a zero space in 3D.\n     *\n     * @return {Box3} A reference to this bounding box.\n     */\n    makeEmpty() {\n      this.min.x = this.min.y = this.min.z = Infinity;\n      this.max.x = this.max.y = this.max.z = -Infinity;\n      return this;\n    }\n    /**\n     * Returns true if this box includes zero points within its bounds.\n     * Note that a box with equal lower and upper bounds still includes one\n     * point, the one both bounds share.\n     *\n     * @return {boolean} Whether this box is empty or not.\n     */\n    isEmpty() {\n      return this.max.x < this.min.x || this.max.y < this.min.y || this.max.z < this.min.z;\n    }\n    /**\n     * Returns the center point of this box.\n     *\n     * @param {Vector3} target - The target vector that is used to store the method\'s result.\n     * @return {Vector3} The center point.\n     */\n    getCenter(target) {\n      return this.isEmpty() ? target.set(0, 0, 0) : target.addVectors(this.min, this.max).multiplyScalar(0.5);\n    }\n    /**\n     * Returns the dimensions of this box.\n     *\n     * @param {Vector3} target - The target vector that is used to store the method\'s result.\n     * @return {Vector3} The size.\n     */\n    getSize(target) {\n      return this.isEmpty() ? target.set(0, 0, 0) : target.subVectors(this.max, this.min);\n    }\n    /**\n     * Expands the boundaries of this box to include the given point.\n     *\n     * @param {Vector3} point - The point that should be included by the bounding box.\n     * @return {Box3} A reference to this bounding box.\n     */\n    expandByPoint(point) {\n      this.min.min(point);\n      this.max.max(point);\n      return this;\n    }\n    /**\n     * Expands this box equilaterally by the given vector. The width of this\n     * box will be expanded by the x component of the vector in both\n     * directions. The height of this box will be expanded by the y component of\n     * the vector in both directions. The depth of this box will be\n     * expanded by the z component of the vector in both directions.\n     *\n     * @param {Vector3} vector - The vector that should expand the bounding box.\n     * @return {Box3} A reference to this bounding box.\n     */\n    expandByVector(vector) {\n      this.min.sub(vector);\n      this.max.add(vector);\n      return this;\n    }\n    /**\n     * Expands each dimension of the box by the given scalar. If negative, the\n     * dimensions of the box will be contracted.\n     *\n     * @param {number} scalar - The scalar value that should expand the bounding box.\n     * @return {Box3} A reference to this bounding box.\n     */\n    expandByScalar(scalar) {\n      this.min.addScalar(-scalar);\n      this.max.addScalar(scalar);\n      return this;\n    }\n    /**\n     * Expands the boundaries of this box to include the given 3D object and\n     * its children, accounting for the object\'s, and children\'s, world\n     * transforms. The function may result in a larger box than strictly\n     * necessary (unless the precise parameter is set to true).\n     *\n     * @param {Object3D} object - The 3D object that should expand the bounding box.\n     * @param {boolean} precise - If set to `true`, the method expands the bounding box\n     * as little as necessary at the expense of more computation.\n     * @return {Box3} A reference to this bounding box.\n     */\n    expandByObject(object, precise = false) {\n      object.updateWorldMatrix(false, false);\n      const geometry = object.geometry;\n      if (geometry !== void 0) {\n        const positionAttribute = geometry.getAttribute("position");\n        if (precise === true && positionAttribute !== void 0 && object.isInstancedMesh !== true) {\n          for (let i2 = 0, l = positionAttribute.count; i2 < l; i2++) {\n            if (object.isMesh === true) {\n              object.getVertexPosition(i2, _vector$b);\n            } else {\n              _vector$b.fromBufferAttribute(positionAttribute, i2);\n            }\n            _vector$b.applyMatrix4(object.matrixWorld);\n            this.expandByPoint(_vector$b);\n          }\n        } else {\n          if (object.boundingBox !== void 0) {\n            if (object.boundingBox === null) {\n              object.computeBoundingBox();\n            }\n            _box$4.copy(object.boundingBox);\n          } else {\n            if (geometry.boundingBox === null) {\n              geometry.computeBoundingBox();\n            }\n            _box$4.copy(geometry.boundingBox);\n          }\n          _box$4.applyMatrix4(object.matrixWorld);\n          this.union(_box$4);\n        }\n      }\n      const children = object.children;\n      for (let i2 = 0, l = children.length; i2 < l; i2++) {\n        this.expandByObject(children[i2], precise);\n      }\n      return this;\n    }\n    /**\n     * Returns `true` if the given point lies within or on the boundaries of this box.\n     *\n     * @param {Vector3} point - The point to test.\n     * @return {boolean} Whether the bounding box contains the given point or not.\n     */\n    containsPoint(point) {\n      return point.x >= this.min.x && point.x <= this.max.x && point.y >= this.min.y && point.y <= this.max.y && point.z >= this.min.z && point.z <= this.max.z;\n    }\n    /**\n     * Returns `true` if this bounding box includes the entirety of the given bounding box.\n     * If this box and the given one are identical, this function also returns `true`.\n     *\n     * @param {Box3} box - The bounding box to test.\n     * @return {boolean} Whether the bounding box contains the given bounding box or not.\n     */\n    containsBox(box) {\n      return this.min.x <= box.min.x && box.max.x <= this.max.x && this.min.y <= box.min.y && box.max.y <= this.max.y && this.min.z <= box.min.z && box.max.z <= this.max.z;\n    }\n    /**\n     * Returns a point as a proportion of this box\'s width, height and depth.\n     *\n     * @param {Vector3} point - A point in 3D space.\n     * @param {Vector3} target - The target vector that is used to store the method\'s result.\n     * @return {Vector3} A point as a proportion of this box\'s width, height and depth.\n     */\n    getParameter(point, target) {\n      return target.set(\n        (point.x - this.min.x) / (this.max.x - this.min.x),\n        (point.y - this.min.y) / (this.max.y - this.min.y),\n        (point.z - this.min.z) / (this.max.z - this.min.z)\n      );\n    }\n    /**\n     * Returns `true` if the given bounding box intersects with this bounding box.\n     *\n     * @param {Box3} box - The bounding box to test.\n     * @return {boolean} Whether the given bounding box intersects with this bounding box.\n     */\n    intersectsBox(box) {\n      return box.max.x >= this.min.x && box.min.x <= this.max.x && box.max.y >= this.min.y && box.min.y <= this.max.y && box.max.z >= this.min.z && box.min.z <= this.max.z;\n    }\n    /**\n     * Returns `true` if the given bounding sphere intersects with this bounding box.\n     *\n     * @param {Sphere} sphere - The bounding sphere to test.\n     * @return {boolean} Whether the given bounding sphere intersects with this bounding box.\n     */\n    intersectsSphere(sphere) {\n      this.clampPoint(sphere.center, _vector$b);\n      return _vector$b.distanceToSquared(sphere.center) <= sphere.radius * sphere.radius;\n    }\n    /**\n     * Returns `true` if the given plane intersects with this bounding box.\n     *\n     * @param {Plane} plane - The plane to test.\n     * @return {boolean} Whether the given plane intersects with this bounding box.\n     */\n    intersectsPlane(plane) {\n      let min, max2;\n      if (plane.normal.x > 0) {\n        min = plane.normal.x * this.min.x;\n        max2 = plane.normal.x * this.max.x;\n      } else {\n        min = plane.normal.x * this.max.x;\n        max2 = plane.normal.x * this.min.x;\n      }\n      if (plane.normal.y > 0) {\n        min += plane.normal.y * this.min.y;\n        max2 += plane.normal.y * this.max.y;\n      } else {\n        min += plane.normal.y * this.max.y;\n        max2 += plane.normal.y * this.min.y;\n      }\n      if (plane.normal.z > 0) {\n        min += plane.normal.z * this.min.z;\n        max2 += plane.normal.z * this.max.z;\n      } else {\n        min += plane.normal.z * this.max.z;\n        max2 += plane.normal.z * this.min.z;\n      }\n      return min <= -plane.constant && max2 >= -plane.constant;\n    }\n    /**\n     * Returns `true` if the given triangle intersects with this bounding box.\n     *\n     * @param {Triangle} triangle - The triangle to test.\n     * @return {boolean} Whether the given triangle intersects with this bounding box.\n     */\n    intersectsTriangle(triangle) {\n      if (this.isEmpty()) {\n        return false;\n      }\n      this.getCenter(_center);\n      _extents.subVectors(this.max, _center);\n      _v0$2.subVectors(triangle.a, _center);\n      _v1$7.subVectors(triangle.b, _center);\n      _v2$4.subVectors(triangle.c, _center);\n      _f0.subVectors(_v1$7, _v0$2);\n      _f1.subVectors(_v2$4, _v1$7);\n      _f2.subVectors(_v0$2, _v2$4);\n      let axes = [\n        0,\n        -_f0.z,\n        _f0.y,\n        0,\n        -_f1.z,\n        _f1.y,\n        0,\n        -_f2.z,\n        _f2.y,\n        _f0.z,\n        0,\n        -_f0.x,\n        _f1.z,\n        0,\n        -_f1.x,\n        _f2.z,\n        0,\n        -_f2.x,\n        -_f0.y,\n        _f0.x,\n        0,\n        -_f1.y,\n        _f1.x,\n        0,\n        -_f2.y,\n        _f2.x,\n        0\n      ];\n      if (!satForAxes(axes, _v0$2, _v1$7, _v2$4, _extents)) {\n        return false;\n      }\n      axes = [1, 0, 0, 0, 1, 0, 0, 0, 1];\n      if (!satForAxes(axes, _v0$2, _v1$7, _v2$4, _extents)) {\n        return false;\n      }\n      _triangleNormal.crossVectors(_f0, _f1);\n      axes = [_triangleNormal.x, _triangleNormal.y, _triangleNormal.z];\n      return satForAxes(axes, _v0$2, _v1$7, _v2$4, _extents);\n    }\n    /**\n     * Clamps the given point within the bounds of this box.\n     *\n     * @param {Vector3} point - The point to clamp.\n     * @param {Vector3} target - The target vector that is used to store the method\'s result.\n     * @return {Vector3} The clamped point.\n     */\n    clampPoint(point, target) {\n      return target.copy(point).clamp(this.min, this.max);\n    }\n    /**\n     * Returns the euclidean distance from any edge of this box to the specified point. If\n     * the given point lies inside of this box, the distance will be `0`.\n     *\n     * @param {Vector3} point - The point to compute the distance to.\n     * @return {number} The euclidean distance.\n     */\n    distanceToPoint(point) {\n      return this.clampPoint(point, _vector$b).distanceTo(point);\n    }\n    /**\n     * Returns a bounding sphere that encloses this bounding box.\n     *\n     * @param {Sphere} target - The target sphere that is used to store the method\'s result.\n     * @return {Sphere} The bounding sphere that encloses this bounding box.\n     */\n    getBoundingSphere(target) {\n      if (this.isEmpty()) {\n        target.makeEmpty();\n      } else {\n        this.getCenter(target.center);\n        target.radius = this.getSize(_vector$b).length() * 0.5;\n      }\n      return target;\n    }\n    /**\n     * Computes the intersection of this bounding box and the given one, setting the upper\n     * bound of this box to the lesser of the two boxes\' upper bounds and the\n     * lower bound of this box to the greater of the two boxes\' lower bounds. If\n     * there\'s no overlap, makes this box empty.\n     *\n     * @param {Box3} box - The bounding box to intersect with.\n     * @return {Box3} A reference to this bounding box.\n     */\n    intersect(box) {\n      this.min.max(box.min);\n      this.max.min(box.max);\n      if (this.isEmpty()) this.makeEmpty();\n      return this;\n    }\n    /**\n     * Computes the union of this box and another and the given one, setting the upper\n     * bound of this box to the greater of the two boxes\' upper bounds and the\n     * lower bound of this box to the lesser of the two boxes\' lower bounds.\n     *\n     * @param {Box3} box - The bounding box that will be unioned with this instance.\n     * @return {Box3} A reference to this bounding box.\n     */\n    union(box) {\n      this.min.min(box.min);\n      this.max.max(box.max);\n      return this;\n    }\n    /**\n     * Transforms this bounding box by the given 4x4 transformation matrix.\n     *\n     * @param {Matrix4} matrix - The transformation matrix.\n     * @return {Box3} A reference to this bounding box.\n     */\n    applyMatrix4(matrix) {\n      if (this.isEmpty()) return this;\n      _points[0].set(this.min.x, this.min.y, this.min.z).applyMatrix4(matrix);\n      _points[1].set(this.min.x, this.min.y, this.max.z).applyMatrix4(matrix);\n      _points[2].set(this.min.x, this.max.y, this.min.z).applyMatrix4(matrix);\n      _points[3].set(this.min.x, this.max.y, this.max.z).applyMatrix4(matrix);\n      _points[4].set(this.max.x, this.min.y, this.min.z).applyMatrix4(matrix);\n      _points[5].set(this.max.x, this.min.y, this.max.z).applyMatrix4(matrix);\n      _points[6].set(this.max.x, this.max.y, this.min.z).applyMatrix4(matrix);\n      _points[7].set(this.max.x, this.max.y, this.max.z).applyMatrix4(matrix);\n      this.setFromPoints(_points);\n      return this;\n    }\n    /**\n     * Adds the given offset to both the upper and lower bounds of this bounding box,\n     * effectively moving it in 3D space.\n     *\n     * @param {Vector3} offset - The offset that should be used to translate the bounding box.\n     * @return {Box3} A reference to this bounding box.\n     */\n    translate(offset) {\n      this.min.add(offset);\n      this.max.add(offset);\n      return this;\n    }\n    /**\n     * Returns `true` if this bounding box is equal with the given one.\n     *\n     * @param {Box3} box - The box to test for equality.\n     * @return {boolean} Whether this bounding box is equal with the given one.\n     */\n    equals(box) {\n      return box.min.equals(this.min) && box.max.equals(this.max);\n    }\n    /**\n     * Returns a serialized structure of the bounding box.\n     *\n     * @return {Object} Serialized structure with fields representing the object state.\n     */\n    toJSON() {\n      return {\n        min: this.min.toArray(),\n        max: this.max.toArray()\n      };\n    }\n    /**\n     * Returns a serialized structure of the bounding box.\n     *\n     * @param {Object} json - The serialized json to set the box from.\n     * @return {Box3} A reference to this bounding box.\n     */\n    fromJSON(json) {\n      this.min.fromArray(json.min);\n      this.max.fromArray(json.max);\n      return this;\n    }\n  }\n  const _points = [\n    /* @__PURE__ */ new Vector3(),\n    /* @__PURE__ */ new Vector3(),\n    /* @__PURE__ */ new Vector3(),\n    /* @__PURE__ */ new Vector3(),\n    /* @__PURE__ */ new Vector3(),\n    /* @__PURE__ */ new Vector3(),\n    /* @__PURE__ */ new Vector3(),\n    /* @__PURE__ */ new Vector3()\n  ];\n  const _vector$b = /* @__PURE__ */ new Vector3();\n  const _box$4 = /* @__PURE__ */ new Box3();\n  const _v0$2 = /* @__PURE__ */ new Vector3();\n  const _v1$7 = /* @__PURE__ */ new Vector3();\n  const _v2$4 = /* @__PURE__ */ new Vector3();\n  const _f0 = /* @__PURE__ */ new Vector3();\n  const _f1 = /* @__PURE__ */ new Vector3();\n  const _f2 = /* @__PURE__ */ new Vector3();\n  const _center = /* @__PURE__ */ new Vector3();\n  const _extents = /* @__PURE__ */ new Vector3();\n  const _triangleNormal = /* @__PURE__ */ new Vector3();\n  const _testAxis = /* @__PURE__ */ new Vector3();\n  function satForAxes(axes, v0, v1, v2, extents) {\n    for (let i2 = 0, j = axes.length - 3; i2 <= j; i2 += 3) {\n      _testAxis.fromArray(axes, i2);\n      const r = extents.x * Math.abs(_testAxis.x) + extents.y * Math.abs(_testAxis.y) + extents.z * Math.abs(_testAxis.z);\n      const p0 = v0.dot(_testAxis);\n      const p1 = v1.dot(_testAxis);\n      const p2 = v2.dot(_testAxis);\n      if (Math.max(-Math.max(p0, p1, p2), Math.min(p0, p1, p2)) > r) {\n        return false;\n      }\n    }\n    return true;\n  }\n  const _colorKeywords = {\n    "aliceblue": 15792383,\n    "antiquewhite": 16444375,\n    "aqua": 65535,\n    "aquamarine": 8388564,\n    "azure": 15794175,\n    "beige": 16119260,\n    "bisque": 16770244,\n    "black": 0,\n    "blanchedalmond": 16772045,\n    "blue": 255,\n    "blueviolet": 9055202,\n    "brown": 10824234,\n    "burlywood": 14596231,\n    "cadetblue": 6266528,\n    "chartreuse": 8388352,\n    "chocolate": 13789470,\n    "coral": 16744272,\n    "cornflowerblue": 6591981,\n    "cornsilk": 16775388,\n    "crimson": 14423100,\n    "cyan": 65535,\n    "darkblue": 139,\n    "darkcyan": 35723,\n    "darkgoldenrod": 12092939,\n    "darkgray": 11119017,\n    "darkgreen": 25600,\n    "darkgrey": 11119017,\n    "darkkhaki": 12433259,\n    "darkmagenta": 9109643,\n    "darkolivegreen": 5597999,\n    "darkorange": 16747520,\n    "darkorchid": 10040012,\n    "darkred": 9109504,\n    "darksalmon": 15308410,\n    "darkseagreen": 9419919,\n    "darkslateblue": 4734347,\n    "darkslategray": 3100495,\n    "darkslategrey": 3100495,\n    "darkturquoise": 52945,\n    "darkviolet": 9699539,\n    "deeppink": 16716947,\n    "deepskyblue": 49151,\n    "dimgray": 6908265,\n    "dimgrey": 6908265,\n    "dodgerblue": 2003199,\n    "firebrick": 11674146,\n    "floralwhite": 16775920,\n    "forestgreen": 2263842,\n    "fuchsia": 16711935,\n    "gainsboro": 14474460,\n    "ghostwhite": 16316671,\n    "gold": 16766720,\n    "goldenrod": 14329120,\n    "gray": 8421504,\n    "green": 32768,\n    "greenyellow": 11403055,\n    "grey": 8421504,\n    "honeydew": 15794160,\n    "hotpink": 16738740,\n    "indianred": 13458524,\n    "indigo": 4915330,\n    "ivory": 16777200,\n    "khaki": 15787660,\n    "lavender": 15132410,\n    "lavenderblush": 16773365,\n    "lawngreen": 8190976,\n    "lemonchiffon": 16775885,\n    "lightblue": 11393254,\n    "lightcoral": 15761536,\n    "lightcyan": 14745599,\n    "lightgoldenrodyellow": 16448210,\n    "lightgray": 13882323,\n    "lightgreen": 9498256,\n    "lightgrey": 13882323,\n    "lightpink": 16758465,\n    "lightsalmon": 16752762,\n    "lightseagreen": 2142890,\n    "lightskyblue": 8900346,\n    "lightslategray": 7833753,\n    "lightslategrey": 7833753,\n    "lightsteelblue": 11584734,\n    "lightyellow": 16777184,\n    "lime": 65280,\n    "limegreen": 3329330,\n    "linen": 16445670,\n    "magenta": 16711935,\n    "maroon": 8388608,\n    "mediumaquamarine": 6737322,\n    "mediumblue": 205,\n    "mediumorchid": 12211667,\n    "mediumpurple": 9662683,\n    "mediumseagreen": 3978097,\n    "mediumslateblue": 8087790,\n    "mediumspringgreen": 64154,\n    "mediumturquoise": 4772300,\n    "mediumvioletred": 13047173,\n    "midnightblue": 1644912,\n    "mintcream": 16121850,\n    "mistyrose": 16770273,\n    "moccasin": 16770229,\n    "navajowhite": 16768685,\n    "navy": 128,\n    "oldlace": 16643558,\n    "olive": 8421376,\n    "olivedrab": 7048739,\n    "orange": 16753920,\n    "orangered": 16729344,\n    "orchid": 14315734,\n    "palegoldenrod": 15657130,\n    "palegreen": 10025880,\n    "paleturquoise": 11529966,\n    "palevioletred": 14381203,\n    "papayawhip": 16773077,\n    "peachpuff": 16767673,\n    "peru": 13468991,\n    "pink": 16761035,\n    "plum": 14524637,\n    "powderblue": 11591910,\n    "purple": 8388736,\n    "rebeccapurple": 6697881,\n    "red": 16711680,\n    "rosybrown": 12357519,\n    "royalblue": 4286945,\n    "saddlebrown": 9127187,\n    "salmon": 16416882,\n    "sandybrown": 16032864,\n    "seagreen": 3050327,\n    "seashell": 16774638,\n    "sienna": 10506797,\n    "silver": 12632256,\n    "skyblue": 8900331,\n    "slateblue": 6970061,\n    "slategray": 7372944,\n    "slategrey": 7372944,\n    "snow": 16775930,\n    "springgreen": 65407,\n    "steelblue": 4620980,\n    "tan": 13808780,\n    "teal": 32896,\n    "thistle": 14204888,\n    "tomato": 16737095,\n    "turquoise": 4251856,\n    "violet": 15631086,\n    "wheat": 16113331,\n    "white": 16777215,\n    "whitesmoke": 16119285,\n    "yellow": 16776960,\n    "yellowgreen": 10145074\n  };\n  const _hslA = { h: 0, s: 0, l: 0 };\n  const _hslB = { h: 0, s: 0, l: 0 };\n  function hue2rgb(p, q, t) {\n    if (t < 0) t += 1;\n    if (t > 1) t -= 1;\n    if (t < 1 / 6) return p + (q - p) * 6 * t;\n    if (t < 1 / 2) return q;\n    if (t < 2 / 3) return p + (q - p) * 6 * (2 / 3 - t);\n    return p;\n  }\n  class Color {\n    /**\n     * Constructs a new color.\n     *\n     * Note that standard method of specifying color in three.js is with a hexadecimal triplet,\n     * and that method is used throughout the rest of the documentation.\n     *\n     * @param {(number|string|Color)} [r] - The red component of the color. If `g` and `b` are\n     * not provided, it can be hexadecimal triplet, a CSS-style string or another `Color` instance.\n     * @param {number} [g] - The green component.\n     * @param {number} [b] - The blue component.\n     */\n    constructor(r, g, b) {\n      this.isColor = true;\n      this.r = 1;\n      this.g = 1;\n      this.b = 1;\n      return this.set(r, g, b);\n    }\n    /**\n     * Sets the colors\'s components from the given values.\n     *\n     * @param {(number|string|Color)} [r] - The red component of the color. If `g` and `b` are\n     * not provided, it can be hexadecimal triplet, a CSS-style string or another `Color` instance.\n     * @param {number} [g] - The green component.\n     * @param {number} [b] - The blue component.\n     * @return {Color} A reference to this color.\n     */\n    set(r, g, b) {\n      if (g === void 0 && b === void 0) {\n        const value = r;\n        if (value && value.isColor) {\n          this.copy(value);\n        } else if (typeof value === "number") {\n          this.setHex(value);\n        } else if (typeof value === "string") {\n          this.setStyle(value);\n        }\n      } else {\n        this.setRGB(r, g, b);\n      }\n      return this;\n    }\n    /**\n     * Sets the colors\'s components to the given scalar value.\n     *\n     * @param {number} scalar - The scalar value.\n     * @return {Color} A reference to this color.\n     */\n    setScalar(scalar) {\n      this.r = scalar;\n      this.g = scalar;\n      this.b = scalar;\n      return this;\n    }\n    /**\n     * Sets this color from a hexadecimal value.\n     *\n     * @param {number} hex - The hexadecimal value.\n     * @param {string} [colorSpace=SRGBColorSpace] - The color space.\n     * @return {Color} A reference to this color.\n     */\n    setHex(hex, colorSpace = SRGBColorSpace) {\n      hex = Math.floor(hex);\n      this.r = (hex >> 16 & 255) / 255;\n      this.g = (hex >> 8 & 255) / 255;\n      this.b = (hex & 255) / 255;\n      ColorManagement.colorSpaceToWorking(this, colorSpace);\n      return this;\n    }\n    /**\n     * Sets this color from RGB values.\n     *\n     * @param {number} r - Red channel value between `0.0` and `1.0`.\n     * @param {number} g - Green channel value between `0.0` and `1.0`.\n     * @param {number} b - Blue channel value between `0.0` and `1.0`.\n     * @param {string} [colorSpace=ColorManagement.workingColorSpace] - The color space.\n     * @return {Color} A reference to this color.\n     */\n    setRGB(r, g, b, colorSpace = ColorManagement.workingColorSpace) {\n      this.r = r;\n      this.g = g;\n      this.b = b;\n      ColorManagement.colorSpaceToWorking(this, colorSpace);\n      return this;\n    }\n    /**\n     * Sets this color from RGB values.\n     *\n     * @param {number} h - Hue value between `0.0` and `1.0`.\n     * @param {number} s - Saturation value between `0.0` and `1.0`.\n     * @param {number} l - Lightness value between `0.0` and `1.0`.\n     * @param {string} [colorSpace=ColorManagement.workingColorSpace] - The color space.\n     * @return {Color} A reference to this color.\n     */\n    setHSL(h, s, l, colorSpace = ColorManagement.workingColorSpace) {\n      h = euclideanModulo(h, 1);\n      s = clamp(s, 0, 1);\n      l = clamp(l, 0, 1);\n      if (s === 0) {\n        this.r = this.g = this.b = l;\n      } else {\n        const p = l <= 0.5 ? l * (1 + s) : l + s - l * s;\n        const q = 2 * l - p;\n        this.r = hue2rgb(q, p, h + 1 / 3);\n        this.g = hue2rgb(q, p, h);\n        this.b = hue2rgb(q, p, h - 1 / 3);\n      }\n      ColorManagement.colorSpaceToWorking(this, colorSpace);\n      return this;\n    }\n    /**\n     * Sets this color from a CSS-style string. For example, `rgb(250, 0,0)`,\n     * `rgb(100%, 0%, 0%)`, `hsl(0, 100%, 50%)`, `#ff0000`, `#f00`, or `red` ( or\n     * any [X11 color name]{@link https://en.wikipedia.org/wiki/X11_color_names#Color_name_chart} -\n     * all 140 color names are supported).\n     *\n     * @param {string} style - Color as a CSS-style string.\n     * @param {string} [colorSpace=SRGBColorSpace] - The color space.\n     * @return {Color} A reference to this color.\n     */\n    setStyle(style, colorSpace = SRGBColorSpace) {\n      function handleAlpha(string) {\n        if (string === void 0) return;\n        if (parseFloat(string) < 1) {\n          console.warn("THREE.Color: Alpha component of " + style + " will be ignored.");\n        }\n      }\n      let m;\n      if (m = /^(\\w+)\\(([^\\)]*)\\)/.exec(style)) {\n        let color;\n        const name = m[1];\n        const components = m[2];\n        switch (name) {\n          case "rgb":\n          case "rgba":\n            if (color = /^\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*(?:,\\s*(\\d*\\.?\\d+)\\s*)?$/.exec(components)) {\n              handleAlpha(color[4]);\n              return this.setRGB(\n                Math.min(255, parseInt(color[1], 10)) / 255,\n                Math.min(255, parseInt(color[2], 10)) / 255,\n                Math.min(255, parseInt(color[3], 10)) / 255,\n                colorSpace\n              );\n            }\n            if (color = /^\\s*(\\d+)\\%\\s*,\\s*(\\d+)\\%\\s*,\\s*(\\d+)\\%\\s*(?:,\\s*(\\d*\\.?\\d+)\\s*)?$/.exec(components)) {\n              handleAlpha(color[4]);\n              return this.setRGB(\n                Math.min(100, parseInt(color[1], 10)) / 100,\n                Math.min(100, parseInt(color[2], 10)) / 100,\n                Math.min(100, parseInt(color[3], 10)) / 100,\n                colorSpace\n              );\n            }\n            break;\n          case "hsl":\n          case "hsla":\n            if (color = /^\\s*(\\d*\\.?\\d+)\\s*,\\s*(\\d*\\.?\\d+)\\%\\s*,\\s*(\\d*\\.?\\d+)\\%\\s*(?:,\\s*(\\d*\\.?\\d+)\\s*)?$/.exec(components)) {\n              handleAlpha(color[4]);\n              return this.setHSL(\n                parseFloat(color[1]) / 360,\n                parseFloat(color[2]) / 100,\n                parseFloat(color[3]) / 100,\n                colorSpace\n              );\n            }\n            break;\n          default:\n            console.warn("THREE.Color: Unknown color model " + style);\n        }\n      } else if (m = /^\\#([A-Fa-f\\d]+)$/.exec(style)) {\n        const hex = m[1];\n        const size = hex.length;\n        if (size === 3) {\n          return this.setRGB(\n            parseInt(hex.charAt(0), 16) / 15,\n            parseInt(hex.charAt(1), 16) / 15,\n            parseInt(hex.charAt(2), 16) / 15,\n            colorSpace\n          );\n        } else if (size === 6) {\n          return this.setHex(parseInt(hex, 16), colorSpace);\n        } else {\n          console.warn("THREE.Color: Invalid hex color " + style);\n        }\n      } else if (style && style.length > 0) {\n        return this.setColorName(style, colorSpace);\n      }\n      return this;\n    }\n    /**\n     * Sets this color from a color name. Faster than {@link Color#setStyle} if\n     * you don\'t need the other CSS-style formats.\n     *\n     * For convenience, the list of names is exposed in `Color.NAMES` as a hash.\n     * ```js\n     * Color.NAMES.aliceblue // returns 0xF0F8FF\n     * ```\n     *\n     * @param {string} style - The color name.\n     * @param {string} [colorSpace=SRGBColorSpace] - The color space.\n     * @return {Color} A reference to this color.\n     */\n    setColorName(style, colorSpace = SRGBColorSpace) {\n      const hex = _colorKeywords[style.toLowerCase()];\n      if (hex !== void 0) {\n        this.setHex(hex, colorSpace);\n      } else {\n        console.warn("THREE.Color: Unknown color " + style);\n      }\n      return this;\n    }\n    /**\n     * Returns a new color with copied values from this instance.\n     *\n     * @return {Color} A clone of this instance.\n     */\n    clone() {\n      return new this.constructor(this.r, this.g, this.b);\n    }\n    /**\n     * Copies the values of the given color to this instance.\n     *\n     * @param {Color} color - The color to copy.\n     * @return {Color} A reference to this color.\n     */\n    copy(color) {\n      this.r = color.r;\n      this.g = color.g;\n      this.b = color.b;\n      return this;\n    }\n    /**\n     * Copies the given color into this color, and then converts this color from\n     * `SRGBColorSpace` to `LinearSRGBColorSpace`.\n     *\n     * @param {Color} color - The color to copy/convert.\n     * @return {Color} A reference to this color.\n     */\n    copySRGBToLinear(color) {\n      this.r = SRGBToLinear(color.r);\n      this.g = SRGBToLinear(color.g);\n      this.b = SRGBToLinear(color.b);\n      return this;\n    }\n    /**\n     * Copies the given color into this color, and then converts this color from\n     * `LinearSRGBColorSpace` to `SRGBColorSpace`.\n     *\n     * @param {Color} color - The color to copy/convert.\n     * @return {Color} A reference to this color.\n     */\n    copyLinearToSRGB(color) {\n      this.r = LinearToSRGB(color.r);\n      this.g = LinearToSRGB(color.g);\n      this.b = LinearToSRGB(color.b);\n      return this;\n    }\n    /**\n     * Converts this color from `SRGBColorSpace` to `LinearSRGBColorSpace`.\n     *\n     * @return {Color} A reference to this color.\n     */\n    convertSRGBToLinear() {\n      this.copySRGBToLinear(this);\n      return this;\n    }\n    /**\n     * Converts this color from `LinearSRGBColorSpace` to `SRGBColorSpace`.\n     *\n     * @return {Color} A reference to this color.\n     */\n    convertLinearToSRGB() {\n      this.copyLinearToSRGB(this);\n      return this;\n    }\n    /**\n     * Returns the hexadecimal value of this color.\n     *\n     * @param {string} [colorSpace=SRGBColorSpace] - The color space.\n     * @return {number} The hexadecimal value.\n     */\n    getHex(colorSpace = SRGBColorSpace) {\n      ColorManagement.workingToColorSpace(_color.copy(this), colorSpace);\n      return Math.round(clamp(_color.r * 255, 0, 255)) * 65536 + Math.round(clamp(_color.g * 255, 0, 255)) * 256 + Math.round(clamp(_color.b * 255, 0, 255));\n    }\n    /**\n     * Returns the hexadecimal value of this color as a string (for example, \'FFFFFF\').\n     *\n     * @param {string} [colorSpace=SRGBColorSpace] - The color space.\n     * @return {string} The hexadecimal value as a string.\n     */\n    getHexString(colorSpace = SRGBColorSpace) {\n      return ("000000" + this.getHex(colorSpace).toString(16)).slice(-6);\n    }\n    /**\n     * Converts the colors RGB values into the HSL format and stores them into the\n     * given target object.\n     *\n     * @param {{h:number,s:number,l:number}} target - The target object that is used to store the method\'s result.\n     * @param {string} [colorSpace=ColorManagement.workingColorSpace] - The color space.\n     * @return {{h:number,s:number,l:number}} The HSL representation of this color.\n     */\n    getHSL(target, colorSpace = ColorManagement.workingColorSpace) {\n      ColorManagement.workingToColorSpace(_color.copy(this), colorSpace);\n      const r = _color.r, g = _color.g, b = _color.b;\n      const max2 = Math.max(r, g, b);\n      const min = Math.min(r, g, b);\n      let hue, saturation;\n      const lightness = (min + max2) / 2;\n      if (min === max2) {\n        hue = 0;\n        saturation = 0;\n      } else {\n        const delta = max2 - min;\n        saturation = lightness <= 0.5 ? delta / (max2 + min) : delta / (2 - max2 - min);\n        switch (max2) {\n          case r:\n            hue = (g - b) / delta + (g < b ? 6 : 0);\n            break;\n          case g:\n            hue = (b - r) / delta + 2;\n            break;\n          case b:\n            hue = (r - g) / delta + 4;\n            break;\n        }\n        hue /= 6;\n      }\n      target.h = hue;\n      target.s = saturation;\n      target.l = lightness;\n      return target;\n    }\n    /**\n     * Returns the RGB values of this color and stores them into the given target object.\n     *\n     * @param {Color} target - The target color that is used to store the method\'s result.\n     * @param {string} [colorSpace=ColorManagement.workingColorSpace] - The color space.\n     * @return {Color} The RGB representation of this color.\n     */\n    getRGB(target, colorSpace = ColorManagement.workingColorSpace) {\n      ColorManagement.workingToColorSpace(_color.copy(this), colorSpace);\n      target.r = _color.r;\n      target.g = _color.g;\n      target.b = _color.b;\n      return target;\n    }\n    /**\n     * Returns the value of this color as a CSS style string. Example: `rgb(255,0,0)`.\n     *\n     * @param {string} [colorSpace=SRGBColorSpace] - The color space.\n     * @return {string} The CSS representation of this color.\n     */\n    getStyle(colorSpace = SRGBColorSpace) {\n      ColorManagement.workingToColorSpace(_color.copy(this), colorSpace);\n      const r = _color.r, g = _color.g, b = _color.b;\n      if (colorSpace !== SRGBColorSpace) {\n        return `color(${colorSpace} ${r.toFixed(3)} ${g.toFixed(3)} ${b.toFixed(3)})`;\n      }\n      return `rgb(${Math.round(r * 255)},${Math.round(g * 255)},${Math.round(b * 255)})`;\n    }\n    /**\n     * Adds the given HSL values to this color\'s values.\n     * Internally, this converts the color\'s RGB values to HSL, adds HSL\n     * and then converts the color back to RGB.\n     *\n     * @param {number} h - Hue value between `0.0` and `1.0`.\n     * @param {number} s - Saturation value between `0.0` and `1.0`.\n     * @param {number} l - Lightness value between `0.0` and `1.0`.\n     * @return {Color} A reference to this color.\n     */\n    offsetHSL(h, s, l) {\n      this.getHSL(_hslA);\n      return this.setHSL(_hslA.h + h, _hslA.s + s, _hslA.l + l);\n    }\n    /**\n     * Adds the RGB values of the given color to the RGB values of this color.\n     *\n     * @param {Color} color - The color to add.\n     * @return {Color} A reference to this color.\n     */\n    add(color) {\n      this.r += color.r;\n      this.g += color.g;\n      this.b += color.b;\n      return this;\n    }\n    /**\n     * Adds the RGB values of the given colors and stores the result in this instance.\n     *\n     * @param {Color} color1 - The first color.\n     * @param {Color} color2 - The second color.\n     * @return {Color} A reference to this color.\n     */\n    addColors(color1, color2) {\n      this.r = color1.r + color2.r;\n      this.g = color1.g + color2.g;\n      this.b = color1.b + color2.b;\n      return this;\n    }\n    /**\n     * Adds the given scalar value to the RGB values of this color.\n     *\n     * @param {number} s - The scalar to add.\n     * @return {Color} A reference to this color.\n     */\n    addScalar(s) {\n      this.r += s;\n      this.g += s;\n      this.b += s;\n      return this;\n    }\n    /**\n     * Subtracts the RGB values of the given color from the RGB values of this color.\n     *\n     * @param {Color} color - The color to subtract.\n     * @return {Color} A reference to this color.\n     */\n    sub(color) {\n      this.r = Math.max(0, this.r - color.r);\n      this.g = Math.max(0, this.g - color.g);\n      this.b = Math.max(0, this.b - color.b);\n      return this;\n    }\n    /**\n     * Multiplies the RGB values of the given color with the RGB values of this color.\n     *\n     * @param {Color} color - The color to multiply.\n     * @return {Color} A reference to this color.\n     */\n    multiply(color) {\n      this.r *= color.r;\n      this.g *= color.g;\n      this.b *= color.b;\n      return this;\n    }\n    /**\n     * Multiplies the given scalar value with the RGB values of this color.\n     *\n     * @param {number} s - The scalar to multiply.\n     * @return {Color} A reference to this color.\n     */\n    multiplyScalar(s) {\n      this.r *= s;\n      this.g *= s;\n      this.b *= s;\n      return this;\n    }\n    /**\n     * Linearly interpolates this color\'s RGB values toward the RGB values of the\n     * given color. The alpha argument can be thought of as the ratio between\n     * the two colors, where `0.0` is this color and `1.0` is the first argument.\n     *\n     * @param {Color} color - The color to converge on.\n     * @param {number} alpha - The interpolation factor in the closed interval `[0,1]`.\n     * @return {Color} A reference to this color.\n     */\n    lerp(color, alpha) {\n      this.r += (color.r - this.r) * alpha;\n      this.g += (color.g - this.g) * alpha;\n      this.b += (color.b - this.b) * alpha;\n      return this;\n    }\n    /**\n     * Linearly interpolates between the given colors and stores the result in this instance.\n     * The alpha argument can be thought of as the ratio between the two colors, where `0.0`\n     * is the first and `1.0` is the second color.\n     *\n     * @param {Color} color1 - The first color.\n     * @param {Color} color2 - The second color.\n     * @param {number} alpha - The interpolation factor in the closed interval `[0,1]`.\n     * @return {Color} A reference to this color.\n     */\n    lerpColors(color1, color2, alpha) {\n      this.r = color1.r + (color2.r - color1.r) * alpha;\n      this.g = color1.g + (color2.g - color1.g) * alpha;\n      this.b = color1.b + (color2.b - color1.b) * alpha;\n      return this;\n    }\n    /**\n     * Linearly interpolates this color\'s HSL values toward the HSL values of the\n     * given color. It differs from {@link Color#lerp} by not interpolating straight\n     * from one color to the other, but instead going through all the hues in between\n     * those two colors. The alpha argument can be thought of as the ratio between\n     * the two colors, where 0.0 is this color and 1.0 is the first argument.\n     *\n     * @param {Color} color - The color to converge on.\n     * @param {number} alpha - The interpolation factor in the closed interval `[0,1]`.\n     * @return {Color} A reference to this color.\n     */\n    lerpHSL(color, alpha) {\n      this.getHSL(_hslA);\n      color.getHSL(_hslB);\n      const h = lerp(_hslA.h, _hslB.h, alpha);\n      const s = lerp(_hslA.s, _hslB.s, alpha);\n      const l = lerp(_hslA.l, _hslB.l, alpha);\n      this.setHSL(h, s, l);\n      return this;\n    }\n    /**\n     * Sets the color\'s RGB components from the given 3D vector.\n     *\n     * @param {Vector3} v - The vector to set.\n     * @return {Color} A reference to this color.\n     */\n    setFromVector3(v) {\n      this.r = v.x;\n      this.g = v.y;\n      this.b = v.z;\n      return this;\n    }\n    /**\n     * Transforms this color with the given 3x3 matrix.\n     *\n     * @param {Matrix3} m - The matrix.\n     * @return {Color} A reference to this color.\n     */\n    applyMatrix3(m) {\n      const r = this.r, g = this.g, b = this.b;\n      const e = m.elements;\n      this.r = e[0] * r + e[3] * g + e[6] * b;\n      this.g = e[1] * r + e[4] * g + e[7] * b;\n      this.b = e[2] * r + e[5] * g + e[8] * b;\n      return this;\n    }\n    /**\n     * Returns `true` if this color is equal with the given one.\n     *\n     * @param {Color} c - The color to test for equality.\n     * @return {boolean} Whether this bounding color is equal with the given one.\n     */\n    equals(c) {\n      return c.r === this.r && c.g === this.g && c.b === this.b;\n    }\n    /**\n     * Sets this color\'s RGB components from the given array.\n     *\n     * @param {Array<number>} array - An array holding the RGB values.\n     * @param {number} [offset=0] - The offset into the array.\n     * @return {Color} A reference to this color.\n     */\n    fromArray(array, offset = 0) {\n      this.r = array[offset];\n      this.g = array[offset + 1];\n      this.b = array[offset + 2];\n      return this;\n    }\n    /**\n     * Writes the RGB components of this color to the given array. If no array is provided,\n     * the method returns a new instance.\n     *\n     * @param {Array<number>} [array=[]] - The target array holding the color components.\n     * @param {number} [offset=0] - Index of the first element in the array.\n     * @return {Array<number>} The color components.\n     */\n    toArray(array = [], offset = 0) {\n      array[offset] = this.r;\n      array[offset + 1] = this.g;\n      array[offset + 2] = this.b;\n      return array;\n    }\n    /**\n     * Sets the components of this color from the given buffer attribute.\n     *\n     * @param {BufferAttribute} attribute - The buffer attribute holding color data.\n     * @param {number} index - The index into the attribute.\n     * @return {Color} A reference to this color.\n     */\n    fromBufferAttribute(attribute, index) {\n      this.r = attribute.getX(index);\n      this.g = attribute.getY(index);\n      this.b = attribute.getZ(index);\n      return this;\n    }\n    /**\n     * This methods defines the serialization result of this class. Returns the color\n     * as a hexadecimal value.\n     *\n     * @return {number} The hexadecimal value.\n     */\n    toJSON() {\n      return this.getHex();\n    }\n    *[Symbol.iterator]() {\n      yield this.r;\n      yield this.g;\n      yield this.b;\n    }\n  }\n  const _color = /* @__PURE__ */ new Color();\n  Color.NAMES = _colorKeywords;\n  if (typeof __THREE_DEVTOOLS__ !== "undefined") {\n    __THREE_DEVTOOLS__.dispatchEvent(new CustomEvent("register", { detail: {\n      revision: REVISION\n    } }));\n  }\n  if (typeof window !== "undefined") {\n    if (window.__THREE__) {\n      console.warn("WARNING: Multiple instances of Three.js being imported.");\n    } else {\n      window.__THREE__ = REVISION;\n    }\n  }\n  const LN_SCALE_MIN = -12;\n  const LN_SCALE_MAX = 9;\n  const LN_SCALE_ZERO = -30;\n  const SCALE_ZERO = Math.exp(LN_SCALE_ZERO);\n  const SPLAT_TEX_WIDTH_BITS = 11;\n  const SPLAT_TEX_HEIGHT_BITS = 11;\n  const SPLAT_TEX_WIDTH = 1 << SPLAT_TEX_WIDTH_BITS;\n  const SPLAT_TEX_HEIGHT = 1 << SPLAT_TEX_HEIGHT_BITS;\n  const SPLAT_TEX_MIN_HEIGHT = 1;\n  function unindentLines(s) {\n    var _a2;\n    let seenNonEmpty = false;\n    const lines = s.split("\\n").map((line) => {\n      const trimmedLine = line.trimEnd();\n      if (seenNonEmpty) {\n        return trimmedLine;\n      }\n      if (trimmedLine.length > 0) {\n        seenNonEmpty = true;\n        return trimmedLine;\n      }\n      return null;\n    }).filter((line) => line != null);\n    while (lines.length > 0 && lines[lines.length - 1].length === 0) {\n      lines.pop();\n    }\n    if (lines.length === 0) {\n      return [];\n    }\n    const indent = (_a2 = lines[0].match(/^\\s*/)) == null ? void 0 : _a2[0];\n    if (!indent) {\n      return lines;\n    }\n    const regex = new RegExp(`^${indent}`);\n    return lines.map((line) => line.replace(regex, ""));\n  }\n  function unindent(s) {\n    return unindentLines(s).join("\\n");\n  }\n  const f32buffer = new Float32Array(1);\n  const u32buffer = new Uint32Array(f32buffer.buffer);\n  const supportsFloat16Array = "Float16Array" in globalThis;\n  const f16buffer = supportsFloat16Array ? new globalThis["Float16Array"](1) : null;\n  const u16buffer = new Uint16Array(f16buffer == null ? void 0 : f16buffer.buffer);\n  function normalize(vec) {\n    const norm = Math.sqrt(vec.reduce((acc, v) => acc + v * v, 0));\n    return vec.map((v) => v / norm);\n  }\n  const toHalf = supportsFloat16Array ? toHalfNative : toHalfJS;\n  const fromHalf = supportsFloat16Array ? fromHalfNative : fromHalfJS;\n  function toHalfNative(f) {\n    f16buffer[0] = f;\n    return u16buffer[0];\n  }\n  function toHalfJS(f) {\n    f32buffer[0] = f;\n    const bits2 = u32buffer[0];\n    const sign = bits2 >> 31 & 1;\n    const exp = bits2 >> 23 & 255;\n    const frac = bits2 & 8388607;\n    const halfSign = sign << 15;\n    if (exp === 255) {\n      if (frac !== 0) {\n        return halfSign | 32767;\n      }\n      return halfSign | 31744;\n    }\n    const newExp = exp - 127 + 15;\n    if (newExp >= 31) {\n      return halfSign | 31744;\n    }\n    if (newExp <= 0) {\n      if (newExp < -10) {\n        return halfSign;\n      }\n      const subFrac = (frac | 8388608) >> 1 - newExp + 13;\n      return halfSign | subFrac;\n    }\n    const halfFrac = frac >> 13;\n    return halfSign | newExp << 10 | halfFrac;\n  }\n  function fromHalfNative(u) {\n    u16buffer[0] = u;\n    return f16buffer[0];\n  }\n  function fromHalfJS(h) {\n    const sign = h >> 15 & 1;\n    const exp = h >> 10 & 31;\n    const frac = h & 1023;\n    let f32bits;\n    if (exp === 0) {\n      if (frac === 0) {\n        f32bits = sign << 31;\n      } else {\n        let mant = frac;\n        let e = -14;\n        while ((mant & 1024) === 0) {\n          mant <<= 1;\n          e--;\n        }\n        mant &= 1023;\n        const newExp = e + 127;\n        const newFrac = mant << 13;\n        f32bits = sign << 31 | newExp << 23 | newFrac;\n      }\n    } else if (exp === 31) {\n      if (frac === 0) {\n        f32bits = sign << 31 | 2139095040;\n      } else {\n        f32bits = sign << 31 | 2143289344;\n      }\n    } else {\n      const newExp = exp - 15 + 127;\n      const newFrac = frac << 13;\n      f32bits = sign << 31 | newExp << 23 | newFrac;\n    }\n    u32buffer[0] = f32bits;\n    return f32buffer[0];\n  }\n  function floatToUint8(v) {\n    return Math.max(0, Math.min(255, Math.round(v * 255)));\n  }\n  function getArrayBuffers(ctx) {\n    const buffers = [];\n    const seen = /* @__PURE__ */ new Set();\n    function traverse(obj) {\n      if (obj && typeof obj === "object" && !seen.has(obj)) {\n        seen.add(obj);\n        if (obj instanceof ArrayBuffer) {\n          buffers.push(obj);\n        } else if (ArrayBuffer.isView(obj)) {\n          buffers.push(obj.buffer);\n        } else if (Array.isArray(obj)) {\n          obj.forEach(traverse);\n        } else {\n          Object.values(obj).forEach(traverse);\n        }\n      }\n    }\n    traverse(ctx);\n    return buffers;\n  }\n  function setPackedSplat(packedSplats, index, x2, y, z, scaleX, scaleY, scaleZ, quatX, quatY, quatZ, quatW, opacity, r, g, b, encoding) {\n    const rgbMin = (encoding == null ? void 0 : encoding.rgbMin) ?? 0;\n    const rgbMax = (encoding == null ? void 0 : encoding.rgbMax) ?? 1;\n    const rgbRange = rgbMax - rgbMin;\n    const uR = floatToUint8((r - rgbMin) / rgbRange);\n    const uG = floatToUint8((g - rgbMin) / rgbRange);\n    const uB = floatToUint8((b - rgbMin) / rgbRange);\n    const uA = floatToUint8(opacity);\n    const uQuat = encodeQuatOctXy88R8(\n      tempQuaternion.set(quatX, quatY, quatZ, quatW)\n    );\n    const uQuatX = uQuat & 255;\n    const uQuatY = uQuat >>> 8 & 255;\n    const uQuatZ = uQuat >>> 16 & 255;\n    const lnScaleMin = (encoding == null ? void 0 : encoding.lnScaleMin) ?? LN_SCALE_MIN;\n    const lnScaleMax = (encoding == null ? void 0 : encoding.lnScaleMax) ?? LN_SCALE_MAX;\n    const lnScaleScale = 254 / (lnScaleMax - lnScaleMin);\n    const uScaleX = scaleX < SCALE_ZERO ? 0 : Math.min(\n      255,\n      Math.max(\n        1,\n        Math.round((Math.log(scaleX) - lnScaleMin) * lnScaleScale) + 1\n      )\n    );\n    const uScaleY = scaleY < SCALE_ZERO ? 0 : Math.min(\n      255,\n      Math.max(\n        1,\n        Math.round((Math.log(scaleY) - lnScaleMin) * lnScaleScale) + 1\n      )\n    );\n    const uScaleZ = scaleZ < SCALE_ZERO ? 0 : Math.min(\n      255,\n      Math.max(\n        1,\n        Math.round((Math.log(scaleZ) - lnScaleMin) * lnScaleScale) + 1\n      )\n    );\n    const uCenterX = toHalf(x2);\n    const uCenterY = toHalf(y);\n    const uCenterZ = toHalf(z);\n    const i4 = index * 4;\n    packedSplats[i4] = uR | uG << 8 | uB << 16 | uA << 24;\n    packedSplats[i4 + 1] = uCenterX | uCenterY << 16;\n    packedSplats[i4 + 2] = uCenterZ | uQuatX << 16 | uQuatY << 24;\n    packedSplats[i4 + 3] = uScaleX | uScaleY << 8 | uScaleZ << 16 | uQuatZ << 24;\n  }\n  function setPackedSplatCenter(packedSplats, index, x2, y, z) {\n    const uCenterX = toHalf(x2);\n    const uCenterY = toHalf(y);\n    const uCenterZ = toHalf(z);\n    const i4 = index * 4;\n    packedSplats[i4 + 1] = uCenterX | uCenterY << 16;\n    packedSplats[i4 + 2] = uCenterZ | packedSplats[i4 + 2] & 4294901760;\n  }\n  function setPackedSplatScales(packedSplats, index, scaleX, scaleY, scaleZ, encoding) {\n    const lnScaleMin = (encoding == null ? void 0 : encoding.lnScaleMin) ?? LN_SCALE_MIN;\n    const lnScaleMax = (encoding == null ? void 0 : encoding.lnScaleMax) ?? LN_SCALE_MAX;\n    const lnScaleScale = 254 / (lnScaleMax - lnScaleMin);\n    const uScaleX = scaleX < SCALE_ZERO ? 0 : Math.min(\n      255,\n      Math.max(\n        1,\n        Math.round((Math.log(scaleX) - lnScaleMin) * lnScaleScale) + 1\n      )\n    );\n    const uScaleY = scaleY < SCALE_ZERO ? 0 : Math.min(\n      255,\n      Math.max(\n        1,\n        Math.round((Math.log(scaleY) - lnScaleMin) * lnScaleScale) + 1\n      )\n    );\n    const uScaleZ = scaleZ < SCALE_ZERO ? 0 : Math.min(\n      255,\n      Math.max(\n        1,\n        Math.round((Math.log(scaleZ) - lnScaleMin) * lnScaleScale) + 1\n      )\n    );\n    const i4 = index * 4;\n    packedSplats[i4 + 3] = uScaleX | uScaleY << 8 | uScaleZ << 16 | packedSplats[i4 + 3] & 4278190080;\n  }\n  const tempQuaternion = new Quaternion();\n  function setPackedSplatQuat(packedSplats, index, quatX, quatY, quatZ, quatW) {\n    const uQuat = encodeQuatOctXy88R8(\n      tempQuaternion.set(quatX, quatY, quatZ, quatW)\n    );\n    const uQuatX = uQuat & 255;\n    const uQuatY = uQuat >>> 8 & 255;\n    const uQuatZ = uQuat >>> 16 & 255;\n    const i4 = index * 4;\n    packedSplats[i4 + 2] = packedSplats[i4 + 2] & 65535 | uQuatX << 16 | uQuatY << 24;\n    packedSplats[i4 + 3] = packedSplats[i4 + 3] & 16777215 | uQuatZ << 24;\n  }\n  function setPackedSplatRgba(packedSplats, index, r, g, b, a, encoding) {\n    const rgbMin = (encoding == null ? void 0 : encoding.rgbMin) ?? 0;\n    const rgbMax = (encoding == null ? void 0 : encoding.rgbMax) ?? 1;\n    const rgbRange = rgbMax - rgbMin;\n    const uR = floatToUint8((r - rgbMin) / rgbRange);\n    const uG = floatToUint8((g - rgbMin) / rgbRange);\n    const uB = floatToUint8((b - rgbMin) / rgbRange);\n    const uA = floatToUint8(a);\n    const i4 = index * 4;\n    packedSplats[i4] = uR | uG << 8 | uB << 16 | uA << 24;\n  }\n  function setPackedSplatRgb(packedSplats, index, r, g, b, encoding) {\n    const rgbMin = (encoding == null ? void 0 : encoding.rgbMin) ?? 0;\n    const rgbMax = (encoding == null ? void 0 : encoding.rgbMax) ?? 1;\n    const rgbRange = rgbMax - rgbMin;\n    const uR = floatToUint8((r - rgbMin) / rgbRange);\n    const uG = floatToUint8((g - rgbMin) / rgbRange);\n    const uB = floatToUint8((b - rgbMin) / rgbRange);\n    const i4 = index * 4;\n    packedSplats[i4] = uR | uG << 8 | uB << 16 | packedSplats[i4] & 4278190080;\n  }\n  function setPackedSplatOpacity(packedSplats, index, opacity) {\n    const uA = floatToUint8(opacity);\n    const i4 = index * 4;\n    packedSplats[i4] = packedSplats[i4] & 16777215 | uA << 24;\n  }\n  new Vector3();\n  new Vector3();\n  new Color();\n  function getTextureSize(numSplats) {\n    const width = SPLAT_TEX_WIDTH;\n    const height = Math.max(\n      SPLAT_TEX_MIN_HEIGHT,\n      Math.min(SPLAT_TEX_HEIGHT, Math.ceil(numSplats / width))\n    );\n    const depth = Math.ceil(numSplats / (width * height));\n    const maxSplats = width * height * depth;\n    return { width, height, depth, maxSplats };\n  }\n  function computeMaxSplats(numSplats) {\n    const width = SPLAT_TEX_WIDTH;\n    const height = Math.max(\n      SPLAT_TEX_MIN_HEIGHT,\n      Math.min(SPLAT_TEX_HEIGHT, Math.ceil(numSplats / width))\n    );\n    const depth = Math.ceil(numSplats / (width * height));\n    return width * height * depth;\n  }\n  unindent(`\n  precision highp float;\n\n  in vec3 position;\n\n  void main() {\n    gl_Position = vec4(position.xy, 0.0, 1.0);\n  }\n`);\n  const tempNormalizedQuaternion = new Quaternion();\n  const tempAxis = new Vector3();\n  function encodeQuatOctXy88R8(q) {\n    const qnorm = tempNormalizedQuaternion.copy(q).normalize();\n    if (qnorm.w < 0) {\n      qnorm.set(-qnorm.x, -qnorm.y, -qnorm.z, -qnorm.w);\n    }\n    const theta = 2 * Math.acos(qnorm.w);\n    const xyz_norm = Math.sqrt(\n      qnorm.x * qnorm.x + qnorm.y * qnorm.y + qnorm.z * qnorm.z\n    );\n    const axis = xyz_norm < 1e-6 ? tempAxis.set(1, 0, 0) : tempAxis.set(qnorm.x, qnorm.y, qnorm.z).divideScalar(xyz_norm);\n    const sum = Math.abs(axis.x) + Math.abs(axis.y) + Math.abs(axis.z);\n    let p_x = axis.x / sum;\n    let p_y = axis.y / sum;\n    if (axis.z < 0) {\n      const tmp = p_x;\n      p_x = (1 - Math.abs(p_y)) * (p_x >= 0 ? 1 : -1);\n      p_y = (1 - Math.abs(tmp)) * (p_y >= 0 ? 1 : -1);\n    }\n    const u_f = p_x * 0.5 + 0.5;\n    const v_f = p_y * 0.5 + 0.5;\n    const quantU = Math.round(u_f * 255);\n    const quantV = Math.round(v_f * 255);\n    const angleInt = Math.round(theta * (255 / Math.PI));\n    return angleInt << 16 | quantV << 8 | quantU;\n  }\n  function packSint8Bytes(b0, b1, b22, b3) {\n    const clampedB0 = Math.max(-127, Math.min(127, b0 * 127));\n    const clampedB1 = Math.max(-127, Math.min(127, b1 * 127));\n    const clampedB2 = Math.max(-127, Math.min(127, b22 * 127));\n    const clampedB3 = Math.max(-127, Math.min(127, b3 * 127));\n    return clampedB0 & 255 | (clampedB1 & 255) << 8 | (clampedB2 & 255) << 16 | (clampedB3 & 255) << 24;\n  }\n  function encodeSh1Rgb(sh1Array, index, sh1Rgb, encoding) {\n    const sh1Min = (encoding == null ? void 0 : encoding.sh1Min) ?? -1;\n    const sh1Max = (encoding == null ? void 0 : encoding.sh1Max) ?? 1;\n    const sh1Mid = 0.5 * (sh1Min + sh1Max);\n    const sh1Scale = 126 / (sh1Max - sh1Min);\n    const base = index * 2;\n    for (let i2 = 0; i2 < 9; ++i2) {\n      const s = (sh1Rgb[i2] - sh1Mid) * sh1Scale;\n      const value = Math.round(Math.max(-63, Math.min(63, s))) & 127;\n      const bitStart = i2 * 7;\n      const bitEnd = bitStart + 7;\n      const wordStart = Math.floor(bitStart / 32);\n      const bitOffset = bitStart - wordStart * 32;\n      const firstWord = value << bitOffset & 4294967295;\n      sh1Array[base + wordStart] |= firstWord;\n      if (bitEnd > wordStart * 32 + 32) {\n        const secondWord = value >>> 32 - bitOffset & 4294967295;\n        sh1Array[base + wordStart + 1] |= secondWord;\n      }\n    }\n  }\n  function encodeSh2Rgb(sh2Array, index, sh2Rgb, encoding) {\n    const sh2Min = (encoding == null ? void 0 : encoding.sh2Min) ?? -1;\n    const sh2Max = (encoding == null ? void 0 : encoding.sh2Max) ?? 1;\n    const sh2Mid = 0.5 * (sh2Min + sh2Max);\n    const sh2Scale = 2 / (sh2Max - sh2Min);\n    sh2Array[index * 4 + 0] = packSint8Bytes(\n      (sh2Rgb[0] - sh2Mid) * sh2Scale,\n      (sh2Rgb[1] - sh2Mid) * sh2Scale,\n      (sh2Rgb[2] - sh2Mid) * sh2Scale,\n      (sh2Rgb[3] - sh2Mid) * sh2Scale\n    );\n    sh2Array[index * 4 + 1] = packSint8Bytes(\n      (sh2Rgb[4] - sh2Mid) * sh2Scale,\n      (sh2Rgb[5] - sh2Mid) * sh2Scale,\n      (sh2Rgb[6] - sh2Mid) * sh2Scale,\n      (sh2Rgb[7] - sh2Mid) * sh2Scale\n    );\n    sh2Array[index * 4 + 2] = packSint8Bytes(\n      (sh2Rgb[8] - sh2Mid) * sh2Scale,\n      (sh2Rgb[9] - sh2Mid) * sh2Scale,\n      (sh2Rgb[10] - sh2Mid) * sh2Scale,\n      (sh2Rgb[11] - sh2Mid) * sh2Scale\n    );\n    sh2Array[index * 4 + 3] = packSint8Bytes(\n      (sh2Rgb[12] - sh2Mid) * sh2Scale,\n      (sh2Rgb[13] - sh2Mid) * sh2Scale,\n      (sh2Rgb[14] - sh2Mid) * sh2Scale,\n      0\n    );\n  }\n  function encodeSh3Rgb(sh3Array, index, sh3Rgb, encoding) {\n    const sh3Min = (encoding == null ? void 0 : encoding.sh3Min) ?? -1;\n    const sh3Max = (encoding == null ? void 0 : encoding.sh3Max) ?? 1;\n    const sh3Mid = 0.5 * (sh3Min + sh3Max);\n    const sh3Scale = 62 / (sh3Max - sh3Min);\n    const base = index * 4;\n    for (let i2 = 0; i2 < 21; ++i2) {\n      const s = (sh3Rgb[i2] - sh3Mid) * sh3Scale;\n      const value = Math.round(Math.max(-31, Math.min(31, s))) & 63;\n      const bitStart = i2 * 6;\n      const bitEnd = bitStart + 6;\n      const wordStart = Math.floor(bitStart / 32);\n      const bitOffset = bitStart - wordStart * 32;\n      const firstWord = value << bitOffset & 4294967295;\n      sh3Array[base + wordStart] |= firstWord;\n      if (bitEnd > wordStart * 32 + 32) {\n        const secondWord = value >>> 32 - bitOffset & 4294967295;\n        sh3Array[base + wordStart + 1] |= secondWord;\n      }\n    }\n  }\n  function decompressPartialGzip(fileBytes, numBytes) {\n    const chunks = [];\n    let totalBytes = 0;\n    let result = null;\n    const gunzip = new Gunzip((data, final) => {\n      chunks.push(data);\n      totalBytes += data.length;\n      if (final || totalBytes >= numBytes) {\n        const allBytes = new Uint8Array(totalBytes);\n        let offset2 = 0;\n        for (const chunk of chunks) {\n          allBytes.set(chunk, offset2);\n          offset2 += chunk.length;\n        }\n        result = allBytes.slice(0, numBytes);\n      }\n    });\n    const CHUNK_SIZE = 1024;\n    let offset = 0;\n    while (result == null && offset < fileBytes.length) {\n      const chunk = fileBytes.slice(offset, offset + CHUNK_SIZE);\n      gunzip.push(chunk, false);\n      offset += CHUNK_SIZE;\n    }\n    if (result == null) {\n      gunzip.push(new Uint8Array(), true);\n      if (result == null) {\n        throw new Error("Failed to decompress partial gzip");\n      }\n    }\n    return result;\n  }\n  class GunzipReader {\n    constructor({\n      fileBytes,\n      chunkBytes = 64 * 1024\n    }) {\n      this.fileBytes = fileBytes;\n      this.chunkBytes = chunkBytes;\n      this.chunks = [];\n      this.totalBytes = 0;\n      const ds = new DecompressionStream("gzip");\n      const decompressionStream = new Blob([fileBytes]).stream().pipeThrough(ds);\n      this.reader = decompressionStream.getReader();\n    }\n    async read(numBytes) {\n      while (this.totalBytes < numBytes) {\n        const { value: chunk, done: readerDone } = await this.reader.read();\n        if (readerDone) {\n          break;\n        }\n        this.chunks.push(chunk);\n        this.totalBytes += chunk.length;\n      }\n      if (this.totalBytes < numBytes) {\n        throw new Error(\n          `Unexpected EOF: needed ${numBytes}, got ${this.totalBytes}`\n        );\n      }\n      const allBytes = new Uint8Array(this.totalBytes);\n      let outOffset = 0;\n      for (const chunk of this.chunks) {\n        allBytes.set(chunk, outOffset);\n        outOffset += chunk.length;\n      }\n      const result = allBytes.subarray(0, numBytes);\n      this.chunks = [allBytes.subarray(numBytes)];\n      this.totalBytes -= numBytes;\n      return result;\n    }\n  }\n  function decodeAntiSplat(fileBytes, initNumSplats, splatCallback) {\n    const numSplats = Math.floor(fileBytes.length / 32);\n    if (numSplats * 32 !== fileBytes.length) {\n      throw new Error("Invalid .splat file size");\n    }\n    initNumSplats(numSplats);\n    const f32 = new Float32Array(fileBytes.buffer);\n    for (let i2 = 0; i2 < numSplats; ++i2) {\n      const i322 = i2 * 32;\n      const i8 = i2 * 8;\n      const x2 = f32[i8 + 0];\n      const y = f32[i8 + 1];\n      const z = f32[i8 + 2];\n      const scaleX = f32[i8 + 3];\n      const scaleY = f32[i8 + 4];\n      const scaleZ = f32[i8 + 5];\n      const r = fileBytes[i322 + 24] / 255;\n      const g = fileBytes[i322 + 25] / 255;\n      const b = fileBytes[i322 + 26] / 255;\n      const opacity = fileBytes[i322 + 27] / 255;\n      const quatW = (fileBytes[i322 + 28] - 128) / 128;\n      const quatX = (fileBytes[i322 + 29] - 128) / 128;\n      const quatY = (fileBytes[i322 + 30] - 128) / 128;\n      const quatZ = (fileBytes[i322 + 31] - 128) / 128;\n      splatCallback(\n        i2,\n        x2,\n        y,\n        z,\n        scaleX,\n        scaleY,\n        scaleZ,\n        quatX,\n        quatY,\n        quatZ,\n        quatW,\n        opacity,\n        r,\n        g,\n        b\n      );\n    }\n  }\n  function unpackAntiSplat(fileBytes, splatEncoding) {\n    let numSplats = 0;\n    let maxSplats = 0;\n    let packedArray = new Uint32Array(0);\n    decodeAntiSplat(\n      fileBytes,\n      (cbNumSplats) => {\n        numSplats = cbNumSplats;\n        maxSplats = computeMaxSplats(numSplats);\n        packedArray = new Uint32Array(maxSplats * 4);\n      },\n      (index, x2, y, z, scaleX, scaleY, scaleZ, quatX, quatY, quatZ, quatW, opacity, r, g, b) => {\n        setPackedSplat(\n          packedArray,\n          index,\n          x2,\n          y,\n          z,\n          scaleX,\n          scaleY,\n          scaleZ,\n          quatX,\n          quatY,\n          quatZ,\n          quatW,\n          opacity,\n          r,\n          g,\n          b,\n          splatEncoding\n        );\n      }\n    );\n    return { packedArray, numSplats };\n  }\n  const KSPLAT_COMPRESSION = {\n    0: {\n      bytesPerCenter: 12,\n      bytesPerScale: 12,\n      bytesPerRotation: 16,\n      bytesPerColor: 4,\n      bytesPerSphericalHarmonicsComponent: 4,\n      scaleOffsetBytes: 12,\n      rotationOffsetBytes: 24,\n      colorOffsetBytes: 40,\n      sphericalHarmonicsOffsetBytes: 44,\n      scaleRange: 1\n    },\n    1: {\n      bytesPerCenter: 6,\n      bytesPerScale: 6,\n      bytesPerRotation: 8,\n      bytesPerColor: 4,\n      bytesPerSphericalHarmonicsComponent: 2,\n      scaleOffsetBytes: 6,\n      rotationOffsetBytes: 12,\n      colorOffsetBytes: 20,\n      sphericalHarmonicsOffsetBytes: 24,\n      scaleRange: 32767\n    },\n    2: {\n      bytesPerCenter: 6,\n      bytesPerScale: 6,\n      bytesPerRotation: 8,\n      bytesPerColor: 4,\n      bytesPerSphericalHarmonicsComponent: 1,\n      scaleOffsetBytes: 6,\n      rotationOffsetBytes: 12,\n      colorOffsetBytes: 20,\n      sphericalHarmonicsOffsetBytes: 24,\n      scaleRange: 32767\n    }\n  };\n  const KSPLAT_SH_DEGREE_TO_COMPONENTS = {\n    0: 0,\n    1: 9,\n    2: 24,\n    3: 45\n  };\n  function decodeKsplat(fileBytes, initNumSplats, splatCallback, shCallback) {\n    var _a2;\n    const HEADER_BYTES = 4096;\n    const SECTION_BYTES = 1024;\n    let headerOffset = 0;\n    const header = new DataView(fileBytes.buffer, headerOffset, HEADER_BYTES);\n    headerOffset += HEADER_BYTES;\n    const versionMajor = header.getUint8(0);\n    const versionMinor = header.getUint8(1);\n    if (versionMajor !== 0 || versionMinor < 1) {\n      throw new Error(\n        `Unsupported .ksplat version: ${versionMajor}.${versionMinor}`\n      );\n    }\n    const maxSectionCount = header.getUint32(4, true);\n    header.getUint32(16, true);\n    const compressionLevel = header.getUint16(20, true);\n    if (compressionLevel < 0 || compressionLevel > 2) {\n      throw new Error(`Invalid .ksplat compression level: ${compressionLevel}`);\n    }\n    const minSphericalHarmonicsCoeff = header.getFloat32(36, true) || -1.5;\n    const maxSphericalHarmonicsCoeff = header.getFloat32(40, true) || 1.5;\n    let sectionBase = HEADER_BYTES + maxSectionCount * SECTION_BYTES;\n    for (let section = 0; section < maxSectionCount; ++section) {\n      let getSh = function(splatOffset, component) {\n        if (compressionLevel === 0) {\n          return data.getFloat32(\n            splatOffset + sphericalHarmonicsOffsetBytes + component * 4,\n            true\n          );\n        }\n        if (compressionLevel === 1) {\n          return fromHalf(\n            data.getUint16(\n              splatOffset + sphericalHarmonicsOffsetBytes + component * 2,\n              true\n            )\n          );\n        }\n        const t = data.getUint8(splatOffset + sphericalHarmonicsOffsetBytes + component) / 255;\n        return minSphericalHarmonicsCoeff + t * (maxSphericalHarmonicsCoeff - minSphericalHarmonicsCoeff);\n      };\n      const section2 = new DataView(fileBytes.buffer, headerOffset, SECTION_BYTES);\n      headerOffset += SECTION_BYTES;\n      const sectionSplatCount = section2.getUint32(0, true);\n      const sectionMaxSplatCount = section2.getUint32(4, true);\n      const bucketSize = section2.getUint32(8, true);\n      const bucketCount = section2.getUint32(12, true);\n      const bucketBlockSize = section2.getFloat32(16, true);\n      const bucketStorageSizeBytes = section2.getUint16(20, true);\n      const compressionScaleRange = (section2.getUint32(24, true) || ((_a2 = KSPLAT_COMPRESSION[compressionLevel]) == null ? void 0 : _a2.scaleRange)) ?? 1;\n      const fullBucketCount = section2.getUint32(32, true);\n      const fullBucketSplats = fullBucketCount * bucketSize;\n      const partiallyFilledBucketCount = section2.getUint32(36, true);\n      const bucketsMetaDataSizeBytes = partiallyFilledBucketCount * 4;\n      const bucketsStorageSizeBytes = bucketStorageSizeBytes * bucketCount + bucketsMetaDataSizeBytes;\n      const sphericalHarmonicsDegree = section2.getUint16(40, true);\n      const shComponents = KSPLAT_SH_DEGREE_TO_COMPONENTS[sphericalHarmonicsDegree];\n      const {\n        bytesPerCenter,\n        bytesPerScale,\n        bytesPerRotation,\n        bytesPerColor,\n        bytesPerSphericalHarmonicsComponent,\n        scaleOffsetBytes,\n        rotationOffsetBytes,\n        colorOffsetBytes,\n        sphericalHarmonicsOffsetBytes\n      } = KSPLAT_COMPRESSION[compressionLevel];\n      const bytesPerSplat = bytesPerCenter + bytesPerScale + bytesPerRotation + bytesPerColor + shComponents * bytesPerSphericalHarmonicsComponent;\n      const splatDataStorageSizeBytes = bytesPerSplat * sectionMaxSplatCount;\n      const storageSizeBytes = splatDataStorageSizeBytes + bucketsStorageSizeBytes;\n      const sh1Index = [0, 3, 6, 1, 4, 7, 2, 5, 8];\n      const sh2Index = [\n        9,\n        14,\n        19,\n        10,\n        15,\n        20,\n        11,\n        16,\n        21,\n        12,\n        17,\n        22,\n        13,\n        18,\n        23\n      ];\n      const sh3Index = [\n        24,\n        31,\n        38,\n        25,\n        32,\n        39,\n        26,\n        33,\n        40,\n        27,\n        34,\n        41,\n        28,\n        35,\n        42,\n        29,\n        36,\n        43,\n        30,\n        37,\n        44\n      ];\n      const sh1 = sphericalHarmonicsDegree >= 1 ? new Float32Array(3 * 3) : void 0;\n      const sh2 = sphericalHarmonicsDegree >= 2 ? new Float32Array(5 * 3) : void 0;\n      const sh3 = sphericalHarmonicsDegree >= 3 ? new Float32Array(7 * 3) : void 0;\n      const compressionScaleFactor = bucketBlockSize / 2 / compressionScaleRange;\n      const bucketsBase = sectionBase + bucketsMetaDataSizeBytes;\n      const dataBase = sectionBase + bucketsStorageSizeBytes;\n      const data = new DataView(\n        fileBytes.buffer,\n        dataBase,\n        splatDataStorageSizeBytes\n      );\n      const bucketArray = new Float32Array(\n        fileBytes.buffer,\n        bucketsBase,\n        bucketCount * 3\n      );\n      const partiallyFilledBucketLengths = new Uint32Array(\n        fileBytes.buffer,\n        sectionBase,\n        partiallyFilledBucketCount\n      );\n      let partialBucketIndex = fullBucketCount;\n      let partialBucketBase = fullBucketSplats;\n      for (let i2 = 0; i2 < sectionSplatCount; ++i2) {\n        const splatOffset = i2 * bytesPerSplat;\n        let bucketIndex;\n        if (i2 < fullBucketSplats) {\n          bucketIndex = Math.floor(i2 / bucketSize);\n        } else {\n          const bucketLength = partiallyFilledBucketLengths[partialBucketIndex - fullBucketCount];\n          if (i2 >= partialBucketBase + bucketLength) {\n            partialBucketIndex += 1;\n            partialBucketBase += bucketLength;\n          }\n          bucketIndex = partialBucketIndex;\n        }\n        const x2 = compressionLevel === 0 ? data.getFloat32(splatOffset + 0, true) : (data.getUint16(splatOffset + 0, true) - compressionScaleRange) * compressionScaleFactor + bucketArray[3 * bucketIndex + 0];\n        const y = compressionLevel === 0 ? data.getFloat32(splatOffset + 4, true) : (data.getUint16(splatOffset + 2, true) - compressionScaleRange) * compressionScaleFactor + bucketArray[3 * bucketIndex + 1];\n        const z = compressionLevel === 0 ? data.getFloat32(splatOffset + 8, true) : (data.getUint16(splatOffset + 4, true) - compressionScaleRange) * compressionScaleFactor + bucketArray[3 * bucketIndex + 2];\n        const scaleX = compressionLevel === 0 ? data.getFloat32(splatOffset + scaleOffsetBytes + 0, true) : fromHalf(data.getUint16(splatOffset + scaleOffsetBytes + 0, true));\n        const scaleY = compressionLevel === 0 ? data.getFloat32(splatOffset + scaleOffsetBytes + 4, true) : fromHalf(data.getUint16(splatOffset + scaleOffsetBytes + 2, true));\n        const scaleZ = compressionLevel === 0 ? data.getFloat32(splatOffset + scaleOffsetBytes + 8, true) : fromHalf(data.getUint16(splatOffset + scaleOffsetBytes + 4, true));\n        const quatW = compressionLevel === 0 ? data.getFloat32(splatOffset + rotationOffsetBytes + 0, true) : fromHalf(\n          data.getUint16(splatOffset + rotationOffsetBytes + 0, true)\n        );\n        const quatX = compressionLevel === 0 ? data.getFloat32(splatOffset + rotationOffsetBytes + 4, true) : fromHalf(\n          data.getUint16(splatOffset + rotationOffsetBytes + 2, true)\n        );\n        const quatY = compressionLevel === 0 ? data.getFloat32(splatOffset + rotationOffsetBytes + 8, true) : fromHalf(\n          data.getUint16(splatOffset + rotationOffsetBytes + 4, true)\n        );\n        const quatZ = compressionLevel === 0 ? data.getFloat32(splatOffset + rotationOffsetBytes + 12, true) : fromHalf(\n          data.getUint16(splatOffset + rotationOffsetBytes + 6, true)\n        );\n        const r = data.getUint8(splatOffset + colorOffsetBytes + 0) / 255;\n        const g = data.getUint8(splatOffset + colorOffsetBytes + 1) / 255;\n        const b = data.getUint8(splatOffset + colorOffsetBytes + 2) / 255;\n        const opacity = data.getUint8(splatOffset + colorOffsetBytes + 3) / 255;\n        splatCallback(\n          i2,\n          x2,\n          y,\n          z,\n          scaleX,\n          scaleY,\n          scaleZ,\n          quatX,\n          quatY,\n          quatZ,\n          quatW,\n          opacity,\n          r,\n          g,\n          b\n        );\n        if (sphericalHarmonicsDegree >= 1 && sh1) {\n          for (const [i22, key] of sh1Index.entries()) {\n            sh1[i22] = getSh(splatOffset, key);\n          }\n          if (sh2) {\n            for (const [i22, key] of sh2Index.entries()) {\n              sh2[i22] = getSh(splatOffset, key);\n            }\n          }\n          if (sh3) {\n            for (const [i22, key] of sh3Index.entries()) {\n              sh3[i22] = getSh(splatOffset, key);\n            }\n          }\n          shCallback == null ? void 0 : shCallback(i2, sh1, sh2, sh3);\n        }\n      }\n      sectionBase += storageSizeBytes;\n    }\n  }\n  function unpackKsplat(fileBytes, splatEncoding) {\n    var _a2;\n    const HEADER_BYTES = 4096;\n    const SECTION_BYTES = 1024;\n    let headerOffset = 0;\n    const header = new DataView(fileBytes.buffer, headerOffset, HEADER_BYTES);\n    headerOffset += HEADER_BYTES;\n    const versionMajor = header.getUint8(0);\n    const versionMinor = header.getUint8(1);\n    if (versionMajor !== 0 || versionMinor < 1) {\n      throw new Error(\n        `Unsupported .ksplat version: ${versionMajor}.${versionMinor}`\n      );\n    }\n    const maxSectionCount = header.getUint32(4, true);\n    const splatCount = header.getUint32(16, true);\n    const compressionLevel = header.getUint16(20, true);\n    if (compressionLevel < 0 || compressionLevel > 2) {\n      throw new Error(`Invalid .ksplat compression level: ${compressionLevel}`);\n    }\n    const minSphericalHarmonicsCoeff = header.getFloat32(36, true) || -1.5;\n    const maxSphericalHarmonicsCoeff = header.getFloat32(40, true) || 1.5;\n    const numSplats = splatCount;\n    const maxSplats = computeMaxSplats(numSplats);\n    const packedArray = new Uint32Array(maxSplats * 4);\n    const extra = {};\n    let sectionBase = HEADER_BYTES + maxSectionCount * SECTION_BYTES;\n    for (let section = 0; section < maxSectionCount; ++section) {\n      let getSh = function(splatOffset, component) {\n        if (compressionLevel === 0) {\n          return data.getFloat32(\n            splatOffset + sphericalHarmonicsOffsetBytes + component * 4,\n            true\n          );\n        }\n        if (compressionLevel === 1) {\n          return fromHalf(\n            data.getUint16(\n              splatOffset + sphericalHarmonicsOffsetBytes + component * 2,\n              true\n            )\n          );\n        }\n        const t = data.getUint8(splatOffset + sphericalHarmonicsOffsetBytes + component) / 255;\n        return minSphericalHarmonicsCoeff + t * (maxSphericalHarmonicsCoeff - minSphericalHarmonicsCoeff);\n      };\n      const section2 = new DataView(fileBytes.buffer, headerOffset, SECTION_BYTES);\n      headerOffset += SECTION_BYTES;\n      const sectionSplatCount = section2.getUint32(0, true);\n      const sectionMaxSplatCount = section2.getUint32(4, true);\n      const bucketSize = section2.getUint32(8, true);\n      const bucketCount = section2.getUint32(12, true);\n      const bucketBlockSize = section2.getFloat32(16, true);\n      const bucketStorageSizeBytes = section2.getUint16(20, true);\n      const compressionScaleRange = (section2.getUint32(24, true) || ((_a2 = KSPLAT_COMPRESSION[compressionLevel]) == null ? void 0 : _a2.scaleRange)) ?? 1;\n      const fullBucketCount = section2.getUint32(32, true);\n      const fullBucketSplats = fullBucketCount * bucketSize;\n      const partiallyFilledBucketCount = section2.getUint32(36, true);\n      const bucketsMetaDataSizeBytes = partiallyFilledBucketCount * 4;\n      const bucketsStorageSizeBytes = bucketStorageSizeBytes * bucketCount + bucketsMetaDataSizeBytes;\n      const sphericalHarmonicsDegree = section2.getUint16(40, true);\n      const shComponents = KSPLAT_SH_DEGREE_TO_COMPONENTS[sphericalHarmonicsDegree];\n      const {\n        bytesPerCenter,\n        bytesPerScale,\n        bytesPerRotation,\n        bytesPerColor,\n        bytesPerSphericalHarmonicsComponent,\n        scaleOffsetBytes,\n        rotationOffsetBytes,\n        colorOffsetBytes,\n        sphericalHarmonicsOffsetBytes\n      } = KSPLAT_COMPRESSION[compressionLevel];\n      const bytesPerSplat = bytesPerCenter + bytesPerScale + bytesPerRotation + bytesPerColor + shComponents * bytesPerSphericalHarmonicsComponent;\n      const splatDataStorageSizeBytes = bytesPerSplat * sectionMaxSplatCount;\n      const storageSizeBytes = splatDataStorageSizeBytes + bucketsStorageSizeBytes;\n      const sh1Index = [0, 3, 6, 1, 4, 7, 2, 5, 8];\n      const sh2Index = [\n        9,\n        14,\n        19,\n        10,\n        15,\n        20,\n        11,\n        16,\n        21,\n        12,\n        17,\n        22,\n        13,\n        18,\n        23\n      ];\n      const sh3Index = [\n        24,\n        31,\n        38,\n        25,\n        32,\n        39,\n        26,\n        33,\n        40,\n        27,\n        34,\n        41,\n        28,\n        35,\n        42,\n        29,\n        36,\n        43,\n        30,\n        37,\n        44\n      ];\n      const sh1 = sphericalHarmonicsDegree >= 1 ? new Float32Array(3 * 3) : void 0;\n      const sh2 = sphericalHarmonicsDegree >= 2 ? new Float32Array(5 * 3) : void 0;\n      const sh3 = sphericalHarmonicsDegree >= 3 ? new Float32Array(7 * 3) : void 0;\n      const compressionScaleFactor = bucketBlockSize / 2 / compressionScaleRange;\n      const bucketsBase = sectionBase + bucketsMetaDataSizeBytes;\n      const dataBase = sectionBase + bucketsStorageSizeBytes;\n      const data = new DataView(\n        fileBytes.buffer,\n        dataBase,\n        splatDataStorageSizeBytes\n      );\n      const bucketArray = new Float32Array(\n        fileBytes.buffer,\n        bucketsBase,\n        bucketCount * 3\n      );\n      const partiallyFilledBucketLengths = new Uint32Array(\n        fileBytes.buffer,\n        sectionBase,\n        partiallyFilledBucketCount\n      );\n      let partialBucketIndex = fullBucketCount;\n      let partialBucketBase = fullBucketSplats;\n      for (let i2 = 0; i2 < sectionSplatCount; ++i2) {\n        const splatOffset = i2 * bytesPerSplat;\n        let bucketIndex;\n        if (i2 < fullBucketSplats) {\n          bucketIndex = Math.floor(i2 / bucketSize);\n        } else {\n          const bucketLength = partiallyFilledBucketLengths[partialBucketIndex - fullBucketCount];\n          if (i2 >= partialBucketBase + bucketLength) {\n            partialBucketIndex += 1;\n            partialBucketBase += bucketLength;\n          }\n          bucketIndex = partialBucketIndex;\n        }\n        const x2 = compressionLevel === 0 ? data.getFloat32(splatOffset + 0, true) : (data.getUint16(splatOffset + 0, true) - compressionScaleRange) * compressionScaleFactor + bucketArray[3 * bucketIndex + 0];\n        const y = compressionLevel === 0 ? data.getFloat32(splatOffset + 4, true) : (data.getUint16(splatOffset + 2, true) - compressionScaleRange) * compressionScaleFactor + bucketArray[3 * bucketIndex + 1];\n        const z = compressionLevel === 0 ? data.getFloat32(splatOffset + 8, true) : (data.getUint16(splatOffset + 4, true) - compressionScaleRange) * compressionScaleFactor + bucketArray[3 * bucketIndex + 2];\n        const scaleX = compressionLevel === 0 ? data.getFloat32(splatOffset + scaleOffsetBytes + 0, true) : fromHalf(data.getUint16(splatOffset + scaleOffsetBytes + 0, true));\n        const scaleY = compressionLevel === 0 ? data.getFloat32(splatOffset + scaleOffsetBytes + 4, true) : fromHalf(data.getUint16(splatOffset + scaleOffsetBytes + 2, true));\n        const scaleZ = compressionLevel === 0 ? data.getFloat32(splatOffset + scaleOffsetBytes + 8, true) : fromHalf(data.getUint16(splatOffset + scaleOffsetBytes + 4, true));\n        const quatW = compressionLevel === 0 ? data.getFloat32(splatOffset + rotationOffsetBytes + 0, true) : fromHalf(\n          data.getUint16(splatOffset + rotationOffsetBytes + 0, true)\n        );\n        const quatX = compressionLevel === 0 ? data.getFloat32(splatOffset + rotationOffsetBytes + 4, true) : fromHalf(\n          data.getUint16(splatOffset + rotationOffsetBytes + 2, true)\n        );\n        const quatY = compressionLevel === 0 ? data.getFloat32(splatOffset + rotationOffsetBytes + 8, true) : fromHalf(\n          data.getUint16(splatOffset + rotationOffsetBytes + 4, true)\n        );\n        const quatZ = compressionLevel === 0 ? data.getFloat32(splatOffset + rotationOffsetBytes + 12, true) : fromHalf(\n          data.getUint16(splatOffset + rotationOffsetBytes + 6, true)\n        );\n        const r = data.getUint8(splatOffset + colorOffsetBytes + 0) / 255;\n        const g = data.getUint8(splatOffset + colorOffsetBytes + 1) / 255;\n        const b = data.getUint8(splatOffset + colorOffsetBytes + 2) / 255;\n        const opacity = data.getUint8(splatOffset + colorOffsetBytes + 3) / 255;\n        setPackedSplat(\n          packedArray,\n          i2,\n          x2,\n          y,\n          z,\n          scaleX,\n          scaleY,\n          scaleZ,\n          quatX,\n          quatY,\n          quatZ,\n          quatW,\n          opacity,\n          r,\n          g,\n          b,\n          splatEncoding\n        );\n        if (sphericalHarmonicsDegree >= 1) {\n          if (sh1) {\n            if (!extra.sh1) {\n              extra.sh1 = new Uint32Array(numSplats * 2);\n            }\n            for (const [i22, key] of sh1Index.entries()) {\n              sh1[i22] = getSh(splatOffset, key);\n            }\n            encodeSh1Rgb(extra.sh1, i2, sh1, splatEncoding);\n          }\n          if (sh2) {\n            if (!extra.sh2) {\n              extra.sh2 = new Uint32Array(numSplats * 4);\n            }\n            for (const [i22, key] of sh2Index.entries()) {\n              sh2[i22] = getSh(splatOffset, key);\n            }\n            encodeSh2Rgb(extra.sh2, i2, sh2, splatEncoding);\n          }\n          if (sh3) {\n            if (!extra.sh3) {\n              extra.sh3 = new Uint32Array(numSplats * 4);\n            }\n            for (const [i22, key] of sh3Index.entries()) {\n              sh3[i22] = getSh(splatOffset, key);\n            }\n            encodeSh3Rgb(extra.sh3, i2, sh3, splatEncoding);\n          }\n        }\n      }\n      sectionBase += storageSizeBytes;\n    }\n    return { packedArray, numSplats, extra };\n  }\n  const PLY_PROPERTY_TYPES = [\n    "char",\n    "uchar",\n    "short",\n    "ushort",\n    "int",\n    "uint",\n    "float",\n    "double"\n  ];\n  const _PlyReader = class _PlyReader {\n    // Create a PlyReader from a Uint8Array/ArrayBuffer, no parsing done yet\n    constructor({ fileBytes }) {\n      this.header = "";\n      this.littleEndian = true;\n      this.elements = {};\n      this.comments = [];\n      this.data = null;\n      this.numSplats = 0;\n      this.fileBytes = fileBytes instanceof ArrayBuffer ? new Uint8Array(fileBytes) : fileBytes;\n    }\n    // Identify and parse the PLY text header (assumed to be <64KB in size).\n    // this.elements will contain all the elements in the file, typically\n    // "vertex" contains the Gsplat data.\n    async parseHeader() {\n      const bufferStream = new ReadableStream({\n        start: (controller) => {\n          controller.enqueue(this.fileBytes.slice(0, 65536));\n          controller.close();\n        }\n      });\n      const decoder = bufferStream.pipeThrough(new TextDecoderStream()).getReader();\n      this.header = "";\n      const headerTerminator = "end_header\\n";\n      while (true) {\n        const { value, done } = await decoder.read();\n        if (done) {\n          throw new Error("Failed to read header");\n        }\n        this.header += value;\n        const endHeader = this.header.indexOf(headerTerminator);\n        if (endHeader >= 0) {\n          this.header = this.header.slice(0, endHeader + headerTerminator.length);\n          break;\n        }\n      }\n      const headerLen = new TextEncoder().encode(this.header).length;\n      this.data = new DataView(this.fileBytes.buffer, headerLen);\n      this.elements = {};\n      let curElement = null;\n      this.comments = [];\n      this.header.trim().split("\\n").forEach((line, lineIndex) => {\n        const trimmedLine = line.trim();\n        if (lineIndex === 0) {\n          if (trimmedLine !== "ply") {\n            throw new Error("Invalid PLY header");\n          }\n          return;\n        }\n        if (trimmedLine.length === 0) {\n          return;\n        }\n        const fields = trimmedLine.split(" ");\n        switch (fields[0]) {\n          case "format":\n            if (fields[1] === "binary_little_endian") {\n              this.littleEndian = true;\n            } else if (fields[1] === "binary_big_endian") {\n              this.littleEndian = false;\n            } else {\n              throw new Error(`Unsupported PLY format: ${fields[1]}`);\n            }\n            if (fields[2] !== "1.0") {\n              throw new Error(`Unsupported PLY version: ${fields[2]}`);\n            }\n            break;\n          case "end_header":\n            break;\n          case "comment":\n            this.comments.push(trimmedLine.slice("comment ".length));\n            break;\n          case "element": {\n            const name = fields[1];\n            curElement = {\n              name,\n              count: Number.parseInt(fields[2]),\n              properties: {}\n            };\n            this.elements[name] = curElement;\n            break;\n          }\n          case "property":\n            if (curElement == null) {\n              throw new Error("Property must be inside an element");\n            }\n            if (fields[1] === "list") {\n              curElement.properties[fields[4]] = {\n                isList: true,\n                type: fields[3],\n                countType: fields[2]\n              };\n            } else {\n              curElement.properties[fields[2]] = {\n                isList: false,\n                type: fields[1]\n              };\n            }\n            break;\n        }\n      });\n      if (this.elements.vertex) {\n        this.numSplats = this.elements.vertex.count;\n      }\n    }\n    parseData(elementCallback) {\n      let offset = 0;\n      const data = this.data;\n      if (data == null) {\n        throw new Error("No data to parse");\n      }\n      for (const elementName in this.elements) {\n        const element = this.elements[elementName];\n        const { count, properties } = element;\n        const item = createEmptyItem(properties);\n        const parseFn = createParseFn(properties, this.littleEndian);\n        const callback = elementCallback(element) ?? (() => {\n        });\n        for (let index = 0; index < count; index++) {\n          offset = parseFn(data, offset, item);\n          callback(index, item);\n        }\n      }\n    }\n    // Parse all the Gsplat data in the PLY file in go, invoking the given\n    // callbacks for each Gsplat.\n    parseSplats(splatCallback, shCallback) {\n      if (this.elements.vertex == null) {\n        throw new Error("No vertex element found");\n      }\n      let isSuperSplat = false;\n      const ssChunks = [];\n      let numSh = 0;\n      let sh1Props = [];\n      let sh2Props = [];\n      let sh3Props = [];\n      let sh1 = void 0;\n      let sh2 = void 0;\n      let sh3 = void 0;\n      function prepareSh() {\n        const num_f_rest = NUM_SH_TO_NUM_F_REST[numSh];\n        sh1Props = new Array(3).fill(null).flatMap((_, k) => [0, 1, 2].map((_2, d) => k + d * num_f_rest / 3));\n        sh2Props = new Array(5).fill(null).flatMap(\n          (_, k) => [0, 1, 2].map((_2, d) => 3 + k + d * num_f_rest / 3)\n        );\n        sh3Props = new Array(7).fill(null).flatMap(\n          (_, k) => [0, 1, 2].map((_2, d) => 8 + k + d * num_f_rest / 3)\n        );\n        sh1 = numSh >= 1 ? new Float32Array(3 * 3) : void 0;\n        sh2 = numSh >= 2 ? new Float32Array(5 * 3) : void 0;\n        sh3 = numSh >= 3 ? new Float32Array(7 * 3) : void 0;\n      }\n      function ssShCallback(index, item) {\n        if (!sh1) {\n          throw new Error("Missing sh1");\n        }\n        const sh = item.f_rest;\n        for (let i2 = 0; i2 < sh1Props.length; i2++) {\n          sh1[i2] = sh[sh1Props[i2]] * 8 / 255 - 4;\n        }\n        if (sh2) {\n          for (let i2 = 0; i2 < sh2Props.length; i2++) {\n            sh2[i2] = sh[sh2Props[i2]] * 8 / 255 - 4;\n          }\n        }\n        if (sh3) {\n          for (let i2 = 0; i2 < sh3Props.length; i2++) {\n            sh3[i2] = sh[sh3Props[i2]] * 8 / 255 - 4;\n          }\n        }\n        shCallback == null ? void 0 : shCallback(index, sh1, sh2, sh3);\n      }\n      function initSuperSplat(element) {\n        const {\n          min_x,\n          min_y,\n          min_z,\n          max_x,\n          max_y,\n          max_z,\n          min_scale_x,\n          min_scale_y,\n          min_scale_z,\n          max_scale_x,\n          max_scale_y,\n          max_scale_z\n        } = element.properties;\n        if (!min_x || !min_y || !min_z || !max_x || !max_y || !max_z || !min_scale_x || !min_scale_y || !min_scale_z || !max_scale_x || !max_scale_y || !max_scale_z) {\n          throw new Error("Missing PLY chunk properties");\n        }\n        isSuperSplat = true;\n        return (index, item) => {\n          const {\n            min_x: min_x2,\n            min_y: min_y2,\n            min_z: min_z2,\n            max_x: max_x2,\n            max_y: max_y2,\n            max_z: max_z2,\n            min_scale_x: min_scale_x2,\n            min_scale_y: min_scale_y2,\n            min_scale_z: min_scale_z2,\n            max_scale_x: max_scale_x2,\n            max_scale_y: max_scale_y2,\n            max_scale_z: max_scale_z2,\n            min_r,\n            min_g,\n            min_b,\n            max_r,\n            max_g,\n            max_b\n          } = item;\n          ssChunks.push({\n            min_x: min_x2,\n            min_y: min_y2,\n            min_z: min_z2,\n            max_x: max_x2,\n            max_y: max_y2,\n            max_z: max_z2,\n            min_scale_x: min_scale_x2,\n            min_scale_y: min_scale_y2,\n            min_scale_z: min_scale_z2,\n            max_scale_x: max_scale_x2,\n            max_scale_y: max_scale_y2,\n            max_scale_z: max_scale_z2,\n            min_r,\n            min_g,\n            min_b,\n            max_r,\n            max_g,\n            max_b\n          });\n        };\n      }\n      function decodeSuperSplat(element) {\n        if (shCallback && element.name === "sh") {\n          numSh = getNumSh(element.properties);\n          prepareSh();\n          return ssShCallback;\n        }\n        if (element.name !== "vertex") {\n          return null;\n        }\n        const { packed_position, packed_rotation, packed_scale, packed_color } = element.properties;\n        if (!packed_position || !packed_rotation || !packed_scale || !packed_color) {\n          throw new Error(\n            "Missing PLY properties: packed_position, packed_rotation, packed_scale, packed_color"\n          );\n        }\n        const SQRT2 = Math.sqrt(2);\n        return (index, item) => {\n          const chunk = ssChunks[index >>> 8];\n          if (chunk == null) {\n            throw new Error("Missing PLY chunk");\n          }\n          const {\n            min_x,\n            min_y,\n            min_z,\n            max_x,\n            max_y,\n            max_z,\n            min_scale_x,\n            min_scale_y,\n            min_scale_z,\n            max_scale_x,\n            max_scale_y,\n            max_scale_z,\n            min_r,\n            min_g,\n            min_b,\n            max_r,\n            max_g,\n            max_b\n          } = chunk;\n          const { packed_position: packed_position2, packed_rotation: packed_rotation2, packed_scale: packed_scale2, packed_color: packed_color2 } = item;\n          const x2 = (packed_position2 >>> 21 & 2047) / 2047 * (max_x - min_x) + min_x;\n          const y = (packed_position2 >>> 11 & 1023) / 1023 * (max_y - min_y) + min_y;\n          const z = (packed_position2 & 2047) / 2047 * (max_z - min_z) + min_z;\n          const r0 = ((packed_rotation2 >>> 20 & 1023) / 1023 - 0.5) * SQRT2;\n          const r1 = ((packed_rotation2 >>> 10 & 1023) / 1023 - 0.5) * SQRT2;\n          const r2 = ((packed_rotation2 & 1023) / 1023 - 0.5) * SQRT2;\n          const rr = Math.sqrt(Math.max(0, 1 - r0 * r0 - r1 * r1 - r2 * r2));\n          const rOrder = packed_rotation2 >>> 30;\n          const quatX = rOrder === 0 ? r0 : rOrder === 1 ? rr : r1;\n          const quatY = rOrder <= 1 ? r1 : rOrder === 2 ? rr : r2;\n          const quatZ = rOrder <= 2 ? r2 : rr;\n          const quatW = rOrder === 0 ? rr : r0;\n          const scaleX = Math.exp(\n            (packed_scale2 >>> 21 & 2047) / 2047 * (max_scale_x - min_scale_x) + min_scale_x\n          );\n          const scaleY = Math.exp(\n            (packed_scale2 >>> 11 & 1023) / 1023 * (max_scale_y - min_scale_y) + min_scale_y\n          );\n          const scaleZ = Math.exp(\n            (packed_scale2 & 2047) / 2047 * (max_scale_z - min_scale_z) + min_scale_z\n          );\n          const r = (packed_color2 >>> 24 & 255) / 255 * ((max_r ?? 1) - (min_r ?? 0)) + (min_r ?? 0);\n          const g = (packed_color2 >>> 16 & 255) / 255 * ((max_g ?? 1) - (min_g ?? 0)) + (min_g ?? 0);\n          const b = (packed_color2 >>> 8 & 255) / 255 * ((max_b ?? 1) - (min_b ?? 0)) + (min_b ?? 0);\n          const opacity = (packed_color2 & 255) / 255;\n          splatCallback(\n            index,\n            x2,\n            y,\n            z,\n            scaleX,\n            scaleY,\n            scaleZ,\n            quatX,\n            quatY,\n            quatZ,\n            quatW,\n            opacity,\n            r,\n            g,\n            b\n          );\n        };\n      }\n      const elementCallback = (element) => {\n        if (element.name === "chunk") {\n          return initSuperSplat(element);\n        }\n        if (isSuperSplat) {\n          return decodeSuperSplat(element);\n        }\n        if (element.name !== "vertex") {\n          return null;\n        }\n        const {\n          x: x2,\n          y,\n          z,\n          scale_0,\n          scale_1,\n          scale_2,\n          rot_0,\n          rot_1,\n          rot_2,\n          rot_3,\n          opacity,\n          f_dc_0,\n          f_dc_1,\n          f_dc_2,\n          red,\n          green,\n          blue,\n          alpha\n        } = element.properties;\n        if (!x2 || !y || !z) {\n          throw new Error("Missing PLY properties: x, y, z");\n        }\n        const hasScales = scale_0 && scale_1 && scale_2;\n        const hasRots = rot_0 && rot_1 && rot_2 && rot_3;\n        const alphaDiv = alpha != null ? FIELD_SCALE[alpha.type] : 1;\n        const redDiv = red != null ? FIELD_SCALE[red.type] : 1;\n        const greenDiv = green != null ? FIELD_SCALE[green.type] : 1;\n        const blueDiv = blue != null ? FIELD_SCALE[blue.type] : 1;\n        numSh = getNumSh(element.properties);\n        prepareSh();\n        return (index, item) => {\n          const scaleX = hasScales ? Math.exp(item.scale_0) : _PlyReader.defaultPointScale;\n          const scaleY = hasScales ? Math.exp(item.scale_1) : _PlyReader.defaultPointScale;\n          const scaleZ = hasScales ? Math.exp(item.scale_2) : _PlyReader.defaultPointScale;\n          const quatX = hasRots ? item.rot_1 : 0;\n          const quatY = hasRots ? item.rot_2 : 0;\n          const quatZ = hasRots ? item.rot_3 : 0;\n          const quatW = hasRots ? item.rot_0 : 1;\n          const op = opacity != null ? 1 / (1 + Math.exp(-item.opacity)) : alpha != null ? item.alpha / alphaDiv : 1;\n          const r = f_dc_0 != null ? item.f_dc_0 * SH_C0$1 + 0.5 : red != null ? item.red / redDiv : 1;\n          const g = f_dc_1 != null ? item.f_dc_1 * SH_C0$1 + 0.5 : green != null ? item.green / greenDiv : 1;\n          const b = f_dc_2 != null ? item.f_dc_2 * SH_C0$1 + 0.5 : blue != null ? item.blue / blueDiv : 1;\n          splatCallback(\n            index,\n            item.x,\n            item.y,\n            item.z,\n            scaleX,\n            scaleY,\n            scaleZ,\n            quatX,\n            quatY,\n            quatZ,\n            quatW,\n            op,\n            r,\n            g,\n            b\n          );\n          if (shCallback && sh1) {\n            const sh = item.f_rest;\n            if (sh1) {\n              for (let i2 = 0; i2 < sh1Props.length; i2++) {\n                sh1[i2] = sh[sh1Props[i2]];\n              }\n            }\n            if (sh2) {\n              for (let i2 = 0; i2 < sh2Props.length; i2++) {\n                sh2[i2] = sh[sh2Props[i2]];\n              }\n            }\n            if (sh3) {\n              for (let i2 = 0; i2 < sh3Props.length; i2++) {\n                sh3[i2] = sh[sh3Props[i2]];\n              }\n            }\n            shCallback(index, sh1, sh2, sh3);\n          }\n        };\n      };\n      this.parseData(elementCallback);\n    }\n    // Inject RGBA values into original PLY file, which can be used to modify\n    // the color/opacity of the Gsplats and write out the modified PLY file.\n    injectRgba(rgba) {\n      let offset = 0;\n      const data = this.data;\n      if (data == null) {\n        throw new Error("No parsed data");\n      }\n      if (rgba.length !== this.numSplats * 4) {\n        throw new Error("Invalid RGBA array length");\n      }\n      for (const elementName in this.elements) {\n        const element = this.elements[elementName];\n        const { count, properties } = element;\n        const parsers = [];\n        let rgbaOffset = 0;\n        const isVertex = elementName === "vertex";\n        if (isVertex) {\n          for (const name of ["opacity", "f_dc_0", "f_dc_1", "f_dc_2"]) {\n            if (!properties[name] || properties[name].type !== "float") {\n              throw new Error(`Can\'t injectRgba due to property: ${name}`);\n            }\n          }\n        }\n        for (const [propertyName, property] of Object.entries(properties)) {\n          if (!property.isList) {\n            if (isVertex) {\n              if (propertyName === "f_dc_0" || propertyName === "f_dc_1" || propertyName === "f_dc_2") {\n                const component = Number.parseInt(\n                  propertyName.slice("f_dc_".length)\n                );\n                parsers.push(() => {\n                  const value = (rgba[rgbaOffset + component] / 255 - 0.5) / SH_C0$1;\n                  SET_FIELD[property.type](\n                    data,\n                    offset,\n                    this.littleEndian,\n                    value\n                  );\n                });\n              } else if (propertyName === "opacity") {\n                parsers.push(() => {\n                  const value = Math.max(\n                    -100,\n                    Math.min(\n                      100,\n                      -Math.log(1 / (rgba[rgbaOffset + 3] / 255) - 1)\n                    )\n                  );\n                  SET_FIELD[property.type](\n                    data,\n                    offset,\n                    this.littleEndian,\n                    value\n                  );\n                });\n              }\n            }\n            parsers.push(() => {\n              offset += FIELD_BYTES[property.type];\n            });\n          } else {\n            parsers.push(() => {\n              const length = PARSE_FIELD[property.countType](\n                data,\n                offset,\n                this.littleEndian\n              );\n              offset += FIELD_BYTES[property.countType];\n              offset += length * FIELD_BYTES[property.type];\n            });\n          }\n        }\n        for (let index = 0; index < count; index++) {\n          for (const parser of parsers) {\n            parser();\n          }\n          if (isVertex) {\n            rgbaOffset += 4;\n          }\n        }\n      }\n    }\n  };\n  _PlyReader.defaultPointScale = 1e-3;\n  let PlyReader = _PlyReader;\n  const SH_C0$1 = 0.28209479177387814;\n  const PARSE_FIELD = {\n    char: (data, offset, littleEndian) => {\n      return data.getInt8(offset);\n    },\n    uchar: (data, offset, littleEndian) => {\n      return data.getUint8(offset);\n    },\n    short: (data, offset, littleEndian) => {\n      return data.getInt16(offset, littleEndian);\n    },\n    ushort: (data, offset, littleEndian) => {\n      return data.getUint16(offset, littleEndian);\n    },\n    int: (data, offset, littleEndian) => {\n      return data.getInt32(offset, littleEndian);\n    },\n    uint: (data, offset, littleEndian) => {\n      return data.getUint32(offset, littleEndian);\n    },\n    float: (data, offset, littleEndian) => {\n      return data.getFloat32(offset, littleEndian);\n    },\n    double: (data, offset, littleEndian) => {\n      return data.getFloat64(offset, littleEndian);\n    }\n  };\n  const SET_FIELD = {\n    char: (data, offset, littleEndian, value) => {\n      data.setInt8(offset, value);\n    },\n    uchar: (data, offset, littleEndian, value) => {\n      data.setUint8(offset, value);\n    },\n    short: (data, offset, littleEndian, value) => {\n      data.setInt16(offset, value, littleEndian);\n    },\n    ushort: (data, offset, littleEndian, value) => {\n      data.setUint16(offset, value, littleEndian);\n    },\n    int: (data, offset, littleEndian, value) => {\n      data.setInt32(offset, value, littleEndian);\n    },\n    uint: (data, offset, littleEndian, value) => {\n      data.setUint32(offset, value, littleEndian);\n    },\n    float: (data, offset, littleEndian, value) => {\n      data.setFloat32(offset, value, littleEndian);\n    },\n    double: (data, offset, littleEndian, value) => {\n      data.setFloat64(offset, value, littleEndian);\n    }\n  };\n  const FIELD_BYTES = {\n    char: 1,\n    uchar: 1,\n    short: 2,\n    ushort: 2,\n    int: 4,\n    uint: 4,\n    float: 4,\n    double: 8\n  };\n  const FIELD_SCALE = {\n    char: 127,\n    uchar: 255,\n    short: 32767,\n    ushort: 65535,\n    int: 2147483647,\n    uint: 4294967295,\n    float: 1,\n    double: 1\n  };\n  const NUM_F_REST_TO_NUM_SH = {\n    0: 0,\n    9: 1,\n    24: 2,\n    45: 3\n  };\n  const NUM_SH_TO_NUM_F_REST = {\n    0: 0,\n    1: 9,\n    2: 24,\n    3: 45\n  };\n  const F_REST_REGEX = /^f_rest_([0-9]{1,2})$/;\n  function createEmptyItem(properties) {\n    const item = {};\n    for (const [propertyName, property] of Object.entries(properties)) {\n      if (F_REST_REGEX.test(propertyName)) {\n        item.f_rest = new Array(getNumSh(properties));\n      } else {\n        item[propertyName] = property.isList ? [] : 0;\n      }\n    }\n    return item;\n  }\n  function createParseFn(properties, littleEndian) {\n    if (safeToCompile(properties)) {\n      return createCompiledParserFn(properties, littleEndian);\n    }\n    return createDynamicParserFn(properties, littleEndian);\n  }\n  const UNSAFE_EVAL_ALLOWED = (() => {\n    try {\n      new Function("return 42;");\n    } catch (e) {\n      return false;\n    }\n    return true;\n  })();\n  const PROPERTY_NAME_REGEX = /^[a-zA-Z0-9_]+$/;\n  function safeToCompile(properties) {\n    if (!UNSAFE_EVAL_ALLOWED) {\n      return false;\n    }\n    for (const [propertyName, property] of Object.entries(properties)) {\n      if (!PROPERTY_NAME_REGEX.test(propertyName)) {\n        return false;\n      }\n      if (property.isList && !PLY_PROPERTY_TYPES.includes(property.countType)) {\n        return false;\n      }\n      if (!PLY_PROPERTY_TYPES.includes(property.type)) {\n        return false;\n      }\n    }\n    return true;\n  }\n  function createCompiledParserFn(properties, littleEndian) {\n    const parserSrc = ["let list;"];\n    for (const [propertyName, property] of Object.entries(properties)) {\n      const fRestMatch = propertyName.match(F_REST_REGEX);\n      if (fRestMatch) {\n        const fRestIndex = +fRestMatch[1];\n        parserSrc.push(\n          /*js*/\n          `\n        item.f_rest[${fRestIndex}] = PARSE_FIELD[\'${property.type}\'](data, offset, ${littleEndian});\n        offset += ${FIELD_BYTES[property.type]};\n      `\n        );\n      } else if (!property.isList) {\n        parserSrc.push(\n          /*js*/\n          `\n        item[\'${propertyName}\'] = PARSE_FIELD[\'${property.type}\'](data, offset, ${littleEndian});\n        offset += ${FIELD_BYTES[property.type]};\n      `\n        );\n      } else {\n        parserSrc.push(\n          /*js*/\n          `\n        list = item[\'${propertyName}\'];\n        list.length = PARSE_FIELD[\'${property.countType}\'](data, offset, ${littleEndian});\n        offset += ${FIELD_BYTES[property.countType]};\n        for (let i = 0; i < list.length; i++) {\n          list[i] = PARSE_FIELD[\'${property.type}\'](data, offset, ${littleEndian});\n          offset += ${FIELD_BYTES[property.type]};\n        }\n      `\n        );\n      }\n    }\n    parserSrc.push("return offset;");\n    const fn = new Function(\n      "data",\n      "offset",\n      "item",\n      "PARSE_FIELD",\n      parserSrc.join("\\n")\n    );\n    return (data, offset, item) => fn(data, offset, item, PARSE_FIELD);\n  }\n  function createDynamicParserFn(properties, littleEndian) {\n    const parsers = [];\n    for (const [propertyName, property] of Object.entries(properties)) {\n      const fRestMatch = propertyName.match(F_REST_REGEX);\n      if (fRestMatch) {\n        const fRestIndex = +fRestMatch[1];\n        parsers.push(\n          (data, offset, item) => {\n            item.f_rest[fRestIndex] = PARSE_FIELD[property.type](\n              data,\n              offset,\n              littleEndian\n            );\n            return offset + FIELD_BYTES[property.type];\n          }\n        );\n      } else if (!property.isList) {\n        parsers.push(\n          (data, offset, item) => {\n            item[propertyName] = PARSE_FIELD[property.type](\n              data,\n              offset,\n              littleEndian\n            );\n            return offset + FIELD_BYTES[property.type];\n          }\n        );\n      } else {\n        parsers.push(\n          (data, offset, item) => {\n            const list = item[propertyName];\n            list.length = PARSE_FIELD[property.countType](\n              data,\n              offset,\n              littleEndian\n            );\n            let currentOffset = offset + FIELD_BYTES[property.countType];\n            for (let i2 = 0; i2 < list.length; i2++) {\n              list[i2] = PARSE_FIELD[property.type](\n                data,\n                currentOffset,\n                littleEndian\n              );\n              currentOffset += FIELD_BYTES[property.type];\n            }\n            return currentOffset;\n          }\n        );\n      }\n    }\n    return (data, offset, item) => {\n      let currentOffset = offset;\n      for (let parserIndex = 0; parserIndex < parsers.length; parserIndex++) {\n        currentOffset = parsers[parserIndex](data, currentOffset, item);\n      }\n      return currentOffset;\n    };\n  }\n  function getNumSh(properties) {\n    let num_f_rest = 0;\n    while (properties[`f_rest_${num_f_rest}`]) {\n      num_f_rest += 1;\n    }\n    const numSh = NUM_F_REST_TO_NUM_SH[num_f_rest];\n    if (numSh == null) {\n      throw new Error(`Unsupported number of SH coefficients: ${num_f_rest}`);\n    }\n    return numSh;\n  }\n  var SplatFileType = /* @__PURE__ */ ((SplatFileType2) => {\n    SplatFileType2["PLY"] = "ply";\n    SplatFileType2["SPZ"] = "spz";\n    SplatFileType2["SPLAT"] = "splat";\n    SplatFileType2["KSPLAT"] = "ksplat";\n    SplatFileType2["PCSOGS"] = "pcsogs";\n    SplatFileType2["PCSOGSZIP"] = "pcsogszip";\n    return SplatFileType2;\n  })(SplatFileType || {});\n  function getSplatFileType(fileBytes) {\n    const view = new DataView(fileBytes.buffer);\n    if ((view.getUint32(0, true) & 16777215) === 7957616) {\n      return "ply";\n    }\n    if ((view.getUint32(0, true) & 16777215) === 559903) {\n      const header = decompressPartialGzip(fileBytes, 4);\n      const gView = new DataView(header.buffer);\n      if (gView.getUint32(0, true) === 1347635022) {\n        return "spz";\n      }\n      return void 0;\n    }\n    if (view.getUint32(0, true) === 67324752) {\n      if (tryPcSogsZip(fileBytes)) {\n        return "pcsogszip";\n      }\n      return void 0;\n    }\n    return void 0;\n  }\n  function getFileExtension(pathOrUrl) {\n    const noTrailing = pathOrUrl.split(/[?#]/, 1)[0];\n    const lastSlash = Math.max(\n      noTrailing.lastIndexOf("/"),\n      noTrailing.lastIndexOf("\\\\")\n    );\n    const filename = noTrailing.slice(lastSlash + 1);\n    const lastDot = filename.lastIndexOf(".");\n    if (lastDot <= 0 || lastDot === filename.length - 1) {\n      return "";\n    }\n    return filename.slice(lastDot + 1).toLowerCase();\n  }\n  function getSplatFileTypeFromPath(pathOrUrl) {\n    const extension = getFileExtension(pathOrUrl);\n    if (extension === "ply") {\n      return "ply";\n    }\n    if (extension === "spz") {\n      return "spz";\n    }\n    if (extension === "splat") {\n      return "splat";\n    }\n    if (extension === "ksplat") {\n      return "ksplat";\n    }\n    if (extension === "sog") {\n      return "pcsogszip";\n    }\n    return void 0;\n  }\n  function tryPcSogs(input) {\n    try {\n      let text;\n      if (typeof input === "string") {\n        text = input;\n      } else {\n        const fileBytes = input instanceof ArrayBuffer ? new Uint8Array(input) : input;\n        if (fileBytes.length > 65536) {\n          return void 0;\n        }\n        text = new TextDecoder().decode(fileBytes);\n      }\n      const json = JSON.parse(text);\n      if (!json || typeof json !== "object" || Array.isArray(json)) {\n        return void 0;\n      }\n      const isVersion2 = json.version === 2;\n      for (const key of ["means", "scales", "quats", "sh0"]) {\n        if (!json[key] || typeof json[key] !== "object" || Array.isArray(json[key])) {\n          return void 0;\n        }\n        if (isVersion2) {\n          if (!json[key].files) {\n            return void 0;\n          }\n          if ((key === "scales" || key === "sh0") && !json[key].codebook) {\n            return void 0;\n          }\n          if (key === "means" && (!json[key].mins || !json[key].maxs)) {\n            return void 0;\n          }\n        } else {\n          if (!json[key].shape || !json[key].files) {\n            return void 0;\n          }\n          if (key !== "quats" && (!json[key].mins || !json[key].maxs)) {\n            return void 0;\n          }\n        }\n      }\n      return json;\n    } catch {\n      return void 0;\n    }\n  }\n  function tryPcSogsZip(input) {\n    try {\n      const fileBytes = input instanceof ArrayBuffer ? new Uint8Array(input) : input;\n      let metaFilename = null;\n      const unzipped = unzipSync(fileBytes, {\n        filter: ({ name }) => {\n          const filename = name.split(/[\\\\/]/).pop();\n          if (filename === "meta.json") {\n            metaFilename = name;\n            return true;\n          }\n          return false;\n        }\n      });\n      if (!metaFilename) {\n        return void 0;\n      }\n      const json = tryPcSogs(unzipped[metaFilename]);\n      if (!json) {\n        return void 0;\n      }\n      return { name: metaFilename, json };\n    } catch {\n      return void 0;\n    }\n  }\n  class SplatData {\n    constructor({ maxSplats = 1 } = {}) {\n      this.numSplats = 0;\n      this.maxSplats = getTextureSize(maxSplats).maxSplats;\n      this.centers = new Float32Array(this.maxSplats * 3);\n      this.scales = new Float32Array(this.maxSplats * 3);\n      this.quaternions = new Float32Array(this.maxSplats * 4);\n      this.opacities = new Float32Array(this.maxSplats);\n      this.colors = new Float32Array(this.maxSplats * 3);\n    }\n    pushSplat() {\n      const index = this.numSplats;\n      this.ensureIndex(index);\n      this.numSplats += 1;\n      return index;\n    }\n    unpushSplat(index) {\n      if (index === this.numSplats - 1) {\n        this.numSplats -= 1;\n      } else {\n        throw new Error("Cannot unpush splat from non-last position");\n      }\n    }\n    ensureCapacity(numSplats) {\n      if (numSplats > this.maxSplats) {\n        const targetSplats = Math.max(numSplats, this.maxSplats * 2);\n        const newCenters = new Float32Array(targetSplats * 3);\n        const newScales = new Float32Array(targetSplats * 3);\n        const newQuaternions = new Float32Array(targetSplats * 4);\n        const newOpacities = new Float32Array(targetSplats);\n        const newColors = new Float32Array(targetSplats * 3);\n        newCenters.set(this.centers);\n        newScales.set(this.scales);\n        newQuaternions.set(this.quaternions);\n        newOpacities.set(this.opacities);\n        newColors.set(this.colors);\n        this.centers = newCenters;\n        this.scales = newScales;\n        this.quaternions = newQuaternions;\n        this.opacities = newOpacities;\n        this.colors = newColors;\n        if (this.sh1) {\n          const newSh1 = new Float32Array(targetSplats * 9);\n          newSh1.set(this.sh1);\n          this.sh1 = newSh1;\n        }\n        if (this.sh2) {\n          const newSh2 = new Float32Array(targetSplats * 15);\n          newSh2.set(this.sh2);\n          this.sh2 = newSh2;\n        }\n        if (this.sh3) {\n          const newSh3 = new Float32Array(targetSplats * 21);\n          newSh3.set(this.sh3);\n          this.sh3 = newSh3;\n        }\n        this.maxSplats = targetSplats;\n      }\n    }\n    ensureIndex(index) {\n      this.ensureCapacity(index + 1);\n    }\n    setCenter(index, x2, y, z) {\n      this.centers[index * 3] = x2;\n      this.centers[index * 3 + 1] = y;\n      this.centers[index * 3 + 2] = z;\n    }\n    setScale(index, scaleX, scaleY, scaleZ) {\n      this.scales[index * 3] = scaleX;\n      this.scales[index * 3 + 1] = scaleY;\n      this.scales[index * 3 + 2] = scaleZ;\n    }\n    setQuaternion(index, x2, y, z, w) {\n      this.quaternions[index * 4] = x2;\n      this.quaternions[index * 4 + 1] = y;\n      this.quaternions[index * 4 + 2] = z;\n      this.quaternions[index * 4 + 3] = w;\n    }\n    setOpacity(index, opacity) {\n      this.opacities[index] = opacity;\n    }\n    setColor(index, r, g, b) {\n      this.colors[index * 3] = r;\n      this.colors[index * 3 + 1] = g;\n      this.colors[index * 3 + 2] = b;\n    }\n    setSh1(index, sh1) {\n      if (!this.sh1) {\n        this.sh1 = new Float32Array(this.maxSplats * 9);\n      }\n      for (let j = 0; j < 9; ++j) {\n        this.sh1[index * 9 + j] = sh1[j];\n      }\n    }\n    setSh2(index, sh2) {\n      if (!this.sh2) {\n        this.sh2 = new Float32Array(this.maxSplats * 15);\n      }\n      for (let j = 0; j < 15; ++j) {\n        this.sh2[index * 15 + j] = sh2[j];\n      }\n    }\n    setSh3(index, sh3) {\n      if (!this.sh3) {\n        this.sh3 = new Float32Array(this.maxSplats * 21);\n      }\n      for (let j = 0; j < 21; ++j) {\n        this.sh3[index * 21 + j] = sh3[j];\n      }\n    }\n  }\n  async function unpackPcSogs(json, extraFiles, splatEncoding) {\n    const isVersion2 = "version" in json;\n    if (!isVersion2 && json.quats.encoding !== "quaternion_packed") {\n      throw new Error("Unsupported quaternion encoding");\n    }\n    const numSplats = isVersion2 ? json.count : json.means.shape[0];\n    const maxSplats = computeMaxSplats(numSplats);\n    const packedArray = new Uint32Array(maxSplats * 4);\n    const extra = {};\n    const meansPromise = Promise.all([\n      decodeImageRgba(extraFiles[json.means.files[0]]),\n      decodeImageRgba(extraFiles[json.means.files[1]])\n    ]).then((means) => {\n      for (let i2 = 0; i2 < numSplats; ++i2) {\n        const i4 = i2 * 4;\n        const fx = (means[0][i4 + 0] + (means[1][i4 + 0] << 8)) / 65535;\n        const fy = (means[0][i4 + 1] + (means[1][i4 + 1] << 8)) / 65535;\n        const fz = (means[0][i4 + 2] + (means[1][i4 + 2] << 8)) / 65535;\n        let x2 = json.means.mins[0] + (json.means.maxs[0] - json.means.mins[0]) * fx;\n        let y = json.means.mins[1] + (json.means.maxs[1] - json.means.mins[1]) * fy;\n        let z = json.means.mins[2] + (json.means.maxs[2] - json.means.mins[2]) * fz;\n        x2 = Math.sign(x2) * (Math.exp(Math.abs(x2)) - 1);\n        y = Math.sign(y) * (Math.exp(Math.abs(y)) - 1);\n        z = Math.sign(z) * (Math.exp(Math.abs(z)) - 1);\n        setPackedSplatCenter(packedArray, i2, x2, y, z);\n      }\n    });\n    const scalesPromise = decodeImageRgba(extraFiles[json.scales.files[0]]).then(\n      (scales) => {\n        let xLookup;\n        let yLookup;\n        let zLookup;\n        if (isVersion2) {\n          xLookup = yLookup = zLookup = json.scales.codebook.map((x2) => Math.exp(x2));\n        } else {\n          xLookup = new Array(256).fill(0).map(\n            (_, i2) => json.scales.mins[0] + (json.scales.maxs[0] - json.scales.mins[0]) * (i2 / 255)\n          ).map((x2) => Math.exp(x2));\n          yLookup = new Array(256).fill(0).map(\n            (_, i2) => json.scales.mins[1] + (json.scales.maxs[1] - json.scales.mins[1]) * (i2 / 255)\n          ).map((x2) => Math.exp(x2));\n          zLookup = new Array(256).fill(0).map(\n            (_, i2) => json.scales.mins[2] + (json.scales.maxs[2] - json.scales.mins[2]) * (i2 / 255)\n          ).map((x2) => Math.exp(x2));\n        }\n        for (let i2 = 0; i2 < numSplats; ++i2) {\n          const i4 = i2 * 4;\n          setPackedSplatScales(\n            packedArray,\n            i2,\n            xLookup[scales[i4 + 0]],\n            yLookup[scales[i4 + 1]],\n            zLookup[scales[i4 + 2]],\n            splatEncoding\n          );\n        }\n      }\n    );\n    const quatsPromise = decodeImageRgba(extraFiles[json.quats.files[0]]).then(\n      (quats) => {\n        const SQRT2 = Math.sqrt(2);\n        const lookup = new Array(256).fill(0).map((_, i2) => (i2 / 255 - 0.5) * SQRT2);\n        for (let i2 = 0; i2 < numSplats; ++i2) {\n          const i4 = i2 * 4;\n          const r0 = lookup[quats[i4 + 0]];\n          const r1 = lookup[quats[i4 + 1]];\n          const r2 = lookup[quats[i4 + 2]];\n          const rr = Math.sqrt(Math.max(0, 1 - r0 * r0 - r1 * r1 - r2 * r2));\n          const rOrder = quats[i4 + 3] - 252;\n          const quatX = rOrder === 0 ? r0 : rOrder === 1 ? rr : r1;\n          const quatY = rOrder <= 1 ? r1 : rOrder === 2 ? rr : r2;\n          const quatZ = rOrder <= 2 ? r2 : rr;\n          const quatW = rOrder === 0 ? rr : r0;\n          setPackedSplatQuat(packedArray, i2, quatX, quatY, quatZ, quatW);\n        }\n      }\n    );\n    const sh0Promise = decodeImageRgba(extraFiles[json.sh0.files[0]]).then(\n      (sh0) => {\n        const SH_C02 = 0.28209479177387814;\n        let rLookup;\n        let gLookup;\n        let bLookup;\n        let aLookup;\n        if (isVersion2) {\n          rLookup = gLookup = bLookup = json.sh0.codebook.map((x2) => SH_C02 * x2 + 0.5);\n          aLookup = new Array(256).fill(0).map((_, i2) => i2 / 255);\n        } else {\n          rLookup = new Array(256).fill(0).map(\n            (_, i2) => json.sh0.mins[0] + (json.sh0.maxs[0] - json.sh0.mins[0]) * (i2 / 255)\n          ).map((x2) => SH_C02 * x2 + 0.5);\n          gLookup = new Array(256).fill(0).map(\n            (_, i2) => json.sh0.mins[1] + (json.sh0.maxs[1] - json.sh0.mins[1]) * (i2 / 255)\n          ).map((x2) => SH_C02 * x2 + 0.5);\n          bLookup = new Array(256).fill(0).map(\n            (_, i2) => json.sh0.mins[2] + (json.sh0.maxs[2] - json.sh0.mins[2]) * (i2 / 255)\n          ).map((x2) => SH_C02 * x2 + 0.5);\n          aLookup = new Array(256).fill(0).map(\n            (_, i2) => json.sh0.mins[3] + (json.sh0.maxs[3] - json.sh0.mins[3]) * (i2 / 255)\n          ).map((x2) => 1 / (1 + Math.exp(-x2)));\n        }\n        for (let i2 = 0; i2 < numSplats; ++i2) {\n          const i4 = i2 * 4;\n          setPackedSplatRgba(\n            packedArray,\n            i2,\n            rLookup[sh0[i4 + 0]],\n            gLookup[sh0[i4 + 1]],\n            bLookup[sh0[i4 + 2]],\n            aLookup[sh0[i4 + 3]],\n            splatEncoding\n          );\n        }\n      }\n    );\n    const promises = [meansPromise, scalesPromise, quatsPromise, sh0Promise];\n    if (json.shN) {\n      const useSH3 = isVersion2 ? json.shN.bands >= 3 : json.shN.shape[1] >= 48 - 3;\n      const useSH2 = isVersion2 ? json.shN.bands >= 2 : json.shN.shape[1] >= 27 - 3;\n      const useSH1 = isVersion2 ? json.shN.bands >= 1 : json.shN.shape[1] >= 12 - 3;\n      if (useSH1) extra.sh1 = new Uint32Array(numSplats * 2);\n      if (useSH2) extra.sh2 = new Uint32Array(numSplats * 4);\n      if (useSH3) extra.sh3 = new Uint32Array(numSplats * 4);\n      const sh1 = new Float32Array(9);\n      const sh2 = new Float32Array(15);\n      const sh3 = new Float32Array(21);\n      const shN = json.shN;\n      const shNPromise = Promise.all([\n        decodeImage(extraFiles[json.shN.files[0]]),\n        decodeImage(extraFiles[json.shN.files[1]])\n      ]).then(([centroids, labels]) => {\n        const lookup = "codebook" in shN ? shN.codebook : new Array(256).fill(0).map((_, i2) => shN.mins + (shN.maxs - shN.mins) * (i2 / 255));\n        for (let i2 = 0; i2 < numSplats; ++i2) {\n          const i4 = i2 * 4;\n          const label = labels.rgba[i4 + 0] + (labels.rgba[i4 + 1] << 8);\n          const col = (label & 63) * 15;\n          const row = label >>> 6;\n          const offset = row * centroids.width + col;\n          for (let d = 0; d < 3; ++d) {\n            if (useSH1) {\n              for (let k = 0; k < 3; ++k) {\n                sh1[k * 3 + d] = lookup[centroids.rgba[(offset + k) * 4 + d]];\n              }\n            }\n            if (useSH2) {\n              for (let k = 0; k < 5; ++k) {\n                sh2[k * 3 + d] = lookup[centroids.rgba[(offset + 3 + k) * 4 + d]];\n              }\n            }\n            if (useSH3) {\n              for (let k = 0; k < 7; ++k) {\n                sh3[k * 3 + d] = lookup[centroids.rgba[(offset + 8 + k) * 4 + d]];\n              }\n            }\n          }\n          if (useSH1)\n            encodeSh1Rgb(extra.sh1, i2, sh1, splatEncoding);\n          if (useSH2)\n            encodeSh2Rgb(extra.sh2, i2, sh2, splatEncoding);\n          if (useSH3)\n            encodeSh3Rgb(extra.sh3, i2, sh3, splatEncoding);\n        }\n      });\n      promises.push(shNPromise);\n    }\n    await Promise.all(promises);\n    return { packedArray, numSplats, extra };\n  }\n  let offscreenGlContext = null;\n  async function decodeImage(fileBytes) {\n    if (!offscreenGlContext) {\n      const canvas = new OffscreenCanvas(1, 1);\n      offscreenGlContext = canvas.getContext("webgl2");\n      if (!offscreenGlContext) {\n        throw new Error("Failed to create WebGL2 context");\n      }\n    }\n    const imageBlob = new Blob([fileBytes]);\n    const bitmap = await createImageBitmap(imageBlob, {\n      premultiplyAlpha: "none"\n    });\n    const gl = offscreenGlContext;\n    const texture = gl.createTexture();\n    gl.bindTexture(gl.TEXTURE_2D, texture);\n    gl.pixelStorei(gl.UNPACK_FLIP_Y_WEBGL, true);\n    gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, bitmap);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST);\n    gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST);\n    const framebuffer = gl.createFramebuffer();\n    gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);\n    gl.framebufferTexture2D(\n      gl.FRAMEBUFFER,\n      gl.COLOR_ATTACHMENT0,\n      gl.TEXTURE_2D,\n      texture,\n      0\n    );\n    const data = new Uint8Array(bitmap.width * bitmap.height * 4);\n    gl.readPixels(\n      0,\n      0,\n      bitmap.width,\n      bitmap.height,\n      gl.RGBA,\n      gl.UNSIGNED_BYTE,\n      data\n    );\n    gl.deleteTexture(texture);\n    gl.deleteFramebuffer(framebuffer);\n    return { rgba: data, width: bitmap.width, height: bitmap.height };\n  }\n  async function decodeImageRgba(fileBytes) {\n    const { rgba } = await decodeImage(fileBytes);\n    return rgba;\n  }\n  async function unpackPcSogsZip(fileBytes, splatEncoding) {\n    var _a2;\n    const nameJson = tryPcSogsZip(fileBytes);\n    if (!nameJson) {\n      throw new Error("Invalid PC SOGS zip file");\n    }\n    const { name, json } = nameJson;\n    const lastSlash = name.lastIndexOf("/");\n    const lastBackslash = name.lastIndexOf("\\\\");\n    const prefix = name.slice(0, Math.max(lastSlash, lastBackslash) + 1);\n    const fileMap = /* @__PURE__ */ new Map();\n    const refFiles = [\n      ...json.means.files,\n      ...json.scales.files,\n      ...json.quats.files,\n      ...json.sh0.files,\n      ...((_a2 = json.shN) == null ? void 0 : _a2.files) ?? []\n    ];\n    for (const file of refFiles) {\n      fileMap.set(prefix + file, file);\n    }\n    const unzipped = await new Promise(\n      (resolve, reject) => {\n        unzip(\n          fileBytes,\n          {\n            filter: ({ name: name2 }) => {\n              return fileMap.has(name2);\n            }\n          },\n          (err2, files) => {\n            if (err2) {\n              reject(err2);\n            } else {\n              resolve(files);\n            }\n          }\n        );\n      }\n    );\n    const extraFiles = {};\n    for (const [full, name2] of fileMap.entries()) {\n      extraFiles[name2] = unzipped[full];\n    }\n    return await unpackPcSogs(json, extraFiles, splatEncoding);\n  }\n  class SpzReader {\n    constructor({ fileBytes }) {\n      this.version = -1;\n      this.numSplats = 0;\n      this.shDegree = 0;\n      this.fractionalBits = 0;\n      this.flags = 0;\n      this.flagAntiAlias = false;\n      this.reserved = 0;\n      this.headerParsed = false;\n      this.parsed = false;\n      this.fileBytes = fileBytes instanceof ArrayBuffer ? new Uint8Array(fileBytes) : fileBytes;\n      this.reader = new GunzipReader({ fileBytes: this.fileBytes });\n    }\n    async parseHeader() {\n      if (this.headerParsed) {\n        throw new Error("SPZ file header already parsed");\n      }\n      const header = new DataView((await this.reader.read(16)).buffer);\n      if (header.getUint32(0, true) !== 1347635022) {\n        throw new Error("Invalid SPZ file");\n      }\n      this.version = header.getUint32(4, true);\n      if (this.version < 1 || this.version > 3) {\n        throw new Error(`Unsupported SPZ version: ${this.version}`);\n      }\n      this.numSplats = header.getUint32(8, true);\n      this.shDegree = header.getUint8(12);\n      this.fractionalBits = header.getUint8(13);\n      this.flags = header.getUint8(14);\n      this.flagAntiAlias = (this.flags & 1) !== 0;\n      this.reserved = header.getUint8(15);\n      this.headerParsed = true;\n      this.parsed = false;\n    }\n    async parseSplats(centerCallback, alphaCallback, rgbCallback, scalesCallback, quatCallback, shCallback) {\n      if (!this.headerParsed) {\n        throw new Error("SPZ file header must be parsed first");\n      }\n      if (this.parsed) {\n        throw new Error("SPZ file already parsed");\n      }\n      this.parsed = true;\n      if (this.version === 1) {\n        const centerBytes = await this.reader.read(this.numSplats * 3 * 2);\n        const centerUint16 = new Uint16Array(centerBytes.buffer);\n        for (let i2 = 0; i2 < this.numSplats; i2++) {\n          const i3 = i2 * 3;\n          const x2 = fromHalf(centerUint16[i3]);\n          const y = fromHalf(centerUint16[i3 + 1]);\n          const z = fromHalf(centerUint16[i3 + 2]);\n          centerCallback == null ? void 0 : centerCallback(i2, x2, y, z);\n        }\n      } else if (this.version === 2 || this.version === 3) {\n        const fixed = 1 << this.fractionalBits;\n        const centerBytes = await this.reader.read(this.numSplats * 3 * 3);\n        for (let i2 = 0; i2 < this.numSplats; i2++) {\n          const i9 = i2 * 9;\n          const x2 = ((centerBytes[i9 + 2] << 24 | centerBytes[i9 + 1] << 16 | centerBytes[i9] << 8) >> 8) / fixed;\n          const y = ((centerBytes[i9 + 5] << 24 | centerBytes[i9 + 4] << 16 | centerBytes[i9 + 3] << 8) >> 8) / fixed;\n          const z = ((centerBytes[i9 + 8] << 24 | centerBytes[i9 + 7] << 16 | centerBytes[i9 + 6] << 8) >> 8) / fixed;\n          centerCallback == null ? void 0 : centerCallback(i2, x2, y, z);\n        }\n      } else {\n        throw new Error("Unreachable");\n      }\n      {\n        const bytes = await this.reader.read(this.numSplats);\n        for (let i2 = 0; i2 < this.numSplats; i2++) {\n          alphaCallback == null ? void 0 : alphaCallback(i2, bytes[i2] / 255);\n        }\n      }\n      {\n        const rgbBytes = await this.reader.read(this.numSplats * 3);\n        const scale = SH_C0 / 0.15;\n        for (let i2 = 0; i2 < this.numSplats; i2++) {\n          const i3 = i2 * 3;\n          const r = (rgbBytes[i3] / 255 - 0.5) * scale + 0.5;\n          const g = (rgbBytes[i3 + 1] / 255 - 0.5) * scale + 0.5;\n          const b = (rgbBytes[i3 + 2] / 255 - 0.5) * scale + 0.5;\n          rgbCallback == null ? void 0 : rgbCallback(i2, r, g, b);\n        }\n      }\n      {\n        const scalesBytes = await this.reader.read(this.numSplats * 3);\n        for (let i2 = 0; i2 < this.numSplats; i2++) {\n          const i3 = i2 * 3;\n          const scaleX = Math.exp(scalesBytes[i3] / 16 - 10);\n          const scaleY = Math.exp(scalesBytes[i3 + 1] / 16 - 10);\n          const scaleZ = Math.exp(scalesBytes[i3 + 2] / 16 - 10);\n          scalesCallback == null ? void 0 : scalesCallback(i2, scaleX, scaleY, scaleZ);\n        }\n      }\n      if (this.version === 3) {\n        const maxValue = 1 / Math.sqrt(2);\n        const quatBytes = await this.reader.read(this.numSplats * 4);\n        for (let i2 = 0; i2 < this.numSplats; i2++) {\n          const i3 = i2 * 4;\n          const quaternion = [0, 0, 0, 0];\n          const values = [\n            quatBytes[i3],\n            quatBytes[i3 + 1],\n            quatBytes[i3 + 2],\n            quatBytes[i3 + 3]\n          ];\n          const combinedValues = values[0] + (values[1] << 8) + (values[2] << 16) + (values[3] << 24);\n          const valueMask = (1 << 9) - 1;\n          const largestIndex = combinedValues >>> 30;\n          let remainingValues = combinedValues;\n          let sumSquares = 0;\n          for (let i22 = 3; i22 >= 0; --i22) {\n            if (i22 !== largestIndex) {\n              const value = remainingValues & valueMask;\n              const sign = remainingValues >>> 9 & 1;\n              remainingValues = remainingValues >>> 10;\n              quaternion[i22] = maxValue * (value / valueMask);\n              quaternion[i22] = sign === 0 ? quaternion[i22] : -quaternion[i22];\n              sumSquares += quaternion[i22] * quaternion[i22];\n            }\n          }\n          const square = 1 - sumSquares;\n          quaternion[largestIndex] = Math.sqrt(Math.max(square, 0));\n          quatCallback == null ? void 0 : quatCallback(\n            i2,\n            quaternion[0],\n            quaternion[1],\n            quaternion[2],\n            quaternion[3]\n          );\n        }\n      } else {\n        const quatBytes = await this.reader.read(this.numSplats * 3);\n        for (let i2 = 0; i2 < this.numSplats; i2++) {\n          const i3 = i2 * 3;\n          const quatX = quatBytes[i3] / 127.5 - 1;\n          const quatY = quatBytes[i3 + 1] / 127.5 - 1;\n          const quatZ = quatBytes[i3 + 2] / 127.5 - 1;\n          const quatW = Math.sqrt(\n            Math.max(0, 1 - quatX * quatX - quatY * quatY - quatZ * quatZ)\n          );\n          quatCallback == null ? void 0 : quatCallback(i2, quatX, quatY, quatZ, quatW);\n        }\n      }\n      if (shCallback && this.shDegree >= 1) {\n        const sh1 = new Float32Array(3 * 3);\n        const sh2 = this.shDegree >= 2 ? new Float32Array(5 * 3) : void 0;\n        const sh3 = this.shDegree >= 3 ? new Float32Array(7 * 3) : void 0;\n        const shBytes = await this.reader.read(\n          this.numSplats * SH_DEGREE_TO_VECS[this.shDegree] * 3\n        );\n        let offset = 0;\n        for (let i2 = 0; i2 < this.numSplats; i2++) {\n          for (let j = 0; j < 9; ++j) {\n            sh1[j] = (shBytes[offset + j] - 128) / 128;\n          }\n          offset += 9;\n          if (sh2) {\n            for (let j = 0; j < 15; ++j) {\n              sh2[j] = (shBytes[offset + j] - 128) / 128;\n            }\n            offset += 15;\n          }\n          if (sh3) {\n            for (let j = 0; j < 21; ++j) {\n              sh3[j] = (shBytes[offset + j] - 128) / 128;\n            }\n            offset += 21;\n          }\n          shCallback == null ? void 0 : shCallback(i2, sh1, sh2, sh3);\n        }\n      }\n    }\n  }\n  const SH_DEGREE_TO_VECS = { 1: 3, 2: 8, 3: 15 };\n  const SH_C0 = 0.28209479177387814;\n  const SPZ_MAGIC = 1347635022;\n  const SPZ_VERSION = 3;\n  const FLAG_ANTIALIASED = 1;\n  class SpzWriter {\n    constructor({\n      numSplats,\n      shDegree,\n      fractionalBits = 12,\n      flagAntiAlias = true\n    }) {\n      this.clippedCount = 0;\n      const splatSize = 9 + // Position\n      1 + // Opacity\n      3 + // Scale\n      3 + // DC-rgb\n      4 + // Rotation\n      (shDegree >= 1 ? 9 : 0) + (shDegree >= 2 ? 15 : 0) + (shDegree >= 3 ? 21 : 0);\n      const bufferSize = 16 + numSplats * splatSize;\n      this.buffer = new ArrayBuffer(bufferSize);\n      this.view = new DataView(this.buffer);\n      this.view.setUint32(0, SPZ_MAGIC, true);\n      this.view.setUint32(4, SPZ_VERSION, true);\n      this.view.setUint32(8, numSplats, true);\n      this.view.setUint8(12, shDegree);\n      this.view.setUint8(13, fractionalBits);\n      this.view.setUint8(14, flagAntiAlias ? FLAG_ANTIALIASED : 0);\n      this.view.setUint8(15, 0);\n      this.numSplats = numSplats;\n      this.shDegree = shDegree;\n      this.fractionalBits = fractionalBits;\n      this.fraction = 1 << fractionalBits;\n      this.flagAntiAlias = flagAntiAlias;\n    }\n    setCenter(index, x2, y, z) {\n      const xRounded = Math.round(x2 * this.fraction);\n      const xInt = Math.max(-8388607, Math.min(8388607, xRounded));\n      const yRounded = Math.round(y * this.fraction);\n      const yInt = Math.max(-8388607, Math.min(8388607, yRounded));\n      const zRounded = Math.round(z * this.fraction);\n      const zInt = Math.max(-8388607, Math.min(8388607, zRounded));\n      const clipped = xRounded !== xInt || yRounded !== yInt || zRounded !== zInt;\n      if (clipped) {\n        this.clippedCount += 1;\n      }\n      const i9 = index * 9;\n      const base = 16 + i9;\n      this.view.setUint8(base, xInt & 255);\n      this.view.setUint8(base + 1, xInt >> 8 & 255);\n      this.view.setUint8(base + 2, xInt >> 16 & 255);\n      this.view.setUint8(base + 3, yInt & 255);\n      this.view.setUint8(base + 4, yInt >> 8 & 255);\n      this.view.setUint8(base + 5, yInt >> 16 & 255);\n      this.view.setUint8(base + 6, zInt & 255);\n      this.view.setUint8(base + 7, zInt >> 8 & 255);\n      this.view.setUint8(base + 8, zInt >> 16 & 255);\n    }\n    setAlpha(index, alpha) {\n      const base = 16 + this.numSplats * 9 + index;\n      this.view.setUint8(\n        base,\n        Math.max(0, Math.min(255, Math.round(alpha * 255)))\n      );\n    }\n    static scaleRgb(r) {\n      const v = ((r - 0.5) / (SH_C0 / 0.15) + 0.5) * 255;\n      return Math.max(0, Math.min(255, Math.round(v)));\n    }\n    setRgb(index, r, g, b) {\n      const base = 16 + this.numSplats * 10 + index * 3;\n      this.view.setUint8(base, SpzWriter.scaleRgb(r));\n      this.view.setUint8(base + 1, SpzWriter.scaleRgb(g));\n      this.view.setUint8(base + 2, SpzWriter.scaleRgb(b));\n    }\n    setScale(index, scaleX, scaleY, scaleZ) {\n      const base = 16 + this.numSplats * 13 + index * 3;\n      this.view.setUint8(\n        base,\n        Math.max(0, Math.min(255, Math.round((Math.log(scaleX) + 10) * 16)))\n      );\n      this.view.setUint8(\n        base + 1,\n        Math.max(0, Math.min(255, Math.round((Math.log(scaleY) + 10) * 16)))\n      );\n      this.view.setUint8(\n        base + 2,\n        Math.max(0, Math.min(255, Math.round((Math.log(scaleZ) + 10) * 16)))\n      );\n    }\n    setQuat(index, ...q) {\n      const base = 16 + this.numSplats * 16 + index * 4;\n      const quat = normalize(q);\n      let iLargest = 0;\n      for (let i2 = 1; i2 < 4; ++i2) {\n        if (Math.abs(quat[i2]) > Math.abs(quat[iLargest])) {\n          iLargest = i2;\n        }\n      }\n      const negate = quat[iLargest] < 0 ? 1 : 0;\n      let comp = iLargest;\n      for (let i2 = 0; i2 < 4; ++i2) {\n        if (i2 !== iLargest) {\n          const negbit = (quat[i2] < 0 ? 1 : 0) ^ negate;\n          const mag = Math.floor(\n            ((1 << 9) - 1) * (Math.abs(quat[i2]) / Math.SQRT1_2) + 0.5\n          );\n          comp = comp << 10 | negbit << 9 | mag;\n        }\n      }\n      this.view.setUint8(base, comp & 255);\n      this.view.setUint8(base + 1, comp >> 8 & 255);\n      this.view.setUint8(base + 2, comp >> 16 & 255);\n      this.view.setUint8(base + 3, comp >>> 24 & 255);\n    }\n    static quantizeSh(sh, bits2) {\n      const value = Math.round(sh * 128) + 128;\n      const bucketSize = 1 << 8 - bits2;\n      const quantized = Math.floor((value + bucketSize / 2) / bucketSize) * bucketSize;\n      return Math.max(0, Math.min(255, quantized));\n    }\n    setSh(index, sh1, sh2, sh3) {\n      const shVecs = SH_DEGREE_TO_VECS[this.shDegree] || 0;\n      const base1 = 16 + this.numSplats * 20 + index * shVecs * 3;\n      for (let j = 0; j < 9; ++j) {\n        this.view.setUint8(base1 + j, SpzWriter.quantizeSh(sh1[j], 5));\n      }\n      if (sh2) {\n        const base2 = base1 + 9;\n        for (let j = 0; j < 15; ++j) {\n          this.view.setUint8(base2 + j, SpzWriter.quantizeSh(sh2[j], 4));\n        }\n        if (sh3) {\n          const base3 = base2 + 15;\n          for (let j = 0; j < 21; ++j) {\n            this.view.setUint8(base3 + j, SpzWriter.quantizeSh(sh3[j], 4));\n          }\n        }\n      }\n    }\n    async finalize() {\n      const input = new Uint8Array(this.buffer);\n      const stream = new ReadableStream({\n        async start(controller) {\n          controller.enqueue(input);\n          controller.close();\n        }\n      });\n      const compressed = stream.pipeThrough(new CompressionStream("gzip"));\n      const response = new Response(compressed);\n      const buffer = await response.arrayBuffer();\n      console.log(\n        "Compressed",\n        input.length,\n        "bytes to",\n        buffer.byteLength,\n        "bytes"\n      );\n      return new Uint8Array(buffer);\n    }\n  }\n  async function transcodeSpz(input) {\n    var _a2, _b2, _c;\n    const splats = new SplatData();\n    const {\n      inputs,\n      clipXyz,\n      maxSh,\n      fractionalBits = 12,\n      opacityThreshold\n    } = input;\n    for (const input2 of inputs) {\n      let transformPos = function(pos) {\n        pos.multiplyScalar(scale);\n        pos.applyQuaternion(quaternion);\n        pos.add(translate);\n        return pos;\n      }, transformScales = function(scales) {\n        scales.multiplyScalar(scale);\n        return scales;\n      }, transformQuaternion = function(quat) {\n        quat.premultiply(quaternion);\n        return quat;\n      }, withinClip = function(p) {\n        return !clip || clip.containsPoint(p);\n      }, withinOpacity = function(opacity) {\n        return opacityThreshold !== void 0 ? opacity >= opacityThreshold : true;\n      };\n      const scale = ((_a2 = input2.transform) == null ? void 0 : _a2.scale) ?? 1;\n      const quaternion = new Quaternion().fromArray(\n        ((_b2 = input2.transform) == null ? void 0 : _b2.quaternion) ?? [0, 0, 0, 1]\n      );\n      const translate = new Vector3().fromArray(\n        ((_c = input2.transform) == null ? void 0 : _c.translate) ?? [0, 0, 0]\n      );\n      const clip = clipXyz ? new Box3(\n        new Vector3().fromArray(clipXyz.min),\n        new Vector3().fromArray(clipXyz.max)\n      ) : void 0;\n      let fileType = input2.fileType;\n      if (!fileType) {\n        fileType = getSplatFileType(input2.fileBytes);\n        if (!fileType && input2.pathOrUrl) {\n          fileType = getSplatFileTypeFromPath(input2.pathOrUrl);\n        }\n      }\n      switch (fileType) {\n        case SplatFileType.PLY: {\n          const ply = new PlyReader({ fileBytes: input2.fileBytes });\n          await ply.parseHeader();\n          let lastIndex = null;\n          ply.parseSplats(\n            (index, x2, y, z, scaleX, scaleY, scaleZ, quatX, quatY, quatZ, quatW, opacity, r, g, b) => {\n              const center = transformPos(new Vector3(x2, y, z));\n              if (withinClip(center) && withinOpacity(opacity)) {\n                lastIndex = splats.pushSplat();\n                splats.setCenter(lastIndex, center.x, center.y, center.z);\n                const scales = transformScales(\n                  new Vector3(scaleX, scaleY, scaleZ)\n                );\n                splats.setScale(lastIndex, scales.x, scales.y, scales.z);\n                const quaternion2 = transformQuaternion(\n                  new Quaternion(quatX, quatY, quatZ, quatW)\n                );\n                splats.setQuaternion(\n                  lastIndex,\n                  quaternion2.x,\n                  quaternion2.y,\n                  quaternion2.z,\n                  quaternion2.w\n                );\n                splats.setOpacity(lastIndex, opacity);\n                splats.setColor(lastIndex, r, g, b);\n              } else {\n                lastIndex = null;\n              }\n            },\n            (index, sh1, sh2, sh3) => {\n              if (sh1 && lastIndex !== null) {\n                splats.setSh1(lastIndex, sh1);\n              }\n              if (sh2 && lastIndex !== null) {\n                splats.setSh2(lastIndex, sh2);\n              }\n              if (sh3 && lastIndex !== null) {\n                splats.setSh3(lastIndex, sh3);\n              }\n            }\n          );\n          break;\n        }\n        case SplatFileType.SPZ: {\n          const spz2 = new SpzReader({ fileBytes: input2.fileBytes });\n          await spz2.parseHeader();\n          const mapping = new Int32Array(spz2.numSplats);\n          mapping.fill(-1);\n          const centers = new Float32Array(spz2.numSplats * 3);\n          const center = new Vector3();\n          spz2.parseSplats(\n            (index, x2, y, z) => {\n              const center2 = transformPos(new Vector3(x2, y, z));\n              centers[index * 3] = center2.x;\n              centers[index * 3 + 1] = center2.y;\n              centers[index * 3 + 2] = center2.z;\n            },\n            (index, alpha) => {\n              center.fromArray(centers, index * 3);\n              if (withinClip(center) && withinOpacity(alpha)) {\n                mapping[index] = splats.pushSplat();\n                splats.setCenter(mapping[index], center.x, center.y, center.z);\n                splats.setOpacity(mapping[index], alpha);\n              }\n            },\n            (index, r, g, b) => {\n              if (mapping[index] >= 0) {\n                splats.setColor(mapping[index], r, g, b);\n              }\n            },\n            (index, scaleX, scaleY, scaleZ) => {\n              if (mapping[index] >= 0) {\n                const scales = transformScales(\n                  new Vector3(scaleX, scaleY, scaleZ)\n                );\n                splats.setScale(mapping[index], scales.x, scales.y, scales.z);\n              }\n            },\n            (index, quatX, quatY, quatZ, quatW) => {\n              if (mapping[index] >= 0) {\n                const quaternion2 = transformQuaternion(\n                  new Quaternion(quatX, quatY, quatZ, quatW)\n                );\n                splats.setQuaternion(\n                  mapping[index],\n                  quaternion2.x,\n                  quaternion2.y,\n                  quaternion2.z,\n                  quaternion2.w\n                );\n              }\n            },\n            (index, sh1, sh2, sh3) => {\n              if (mapping[index] >= 0) {\n                splats.setSh1(mapping[index], sh1);\n                if (sh2) {\n                  splats.setSh2(mapping[index], sh2);\n                }\n                if (sh3) {\n                  splats.setSh3(mapping[index], sh3);\n                }\n              }\n            }\n          );\n          break;\n        }\n        case SplatFileType.SPLAT:\n          decodeAntiSplat(\n            input2.fileBytes,\n            (numSplats) => {\n            },\n            (index, x2, y, z, scaleX, scaleY, scaleZ, quatX, quatY, quatZ, quatW, opacity, r, g, b) => {\n              const center = transformPos(new Vector3(x2, y, z));\n              if (withinClip(center) && withinOpacity(opacity)) {\n                const index2 = splats.pushSplat();\n                splats.setCenter(index2, center.x, center.y, center.z);\n                const scales = transformScales(\n                  new Vector3(scaleX, scaleY, scaleZ)\n                );\n                splats.setScale(index2, scales.x, scales.y, scales.z);\n                const quaternion2 = transformQuaternion(\n                  new Quaternion(quatX, quatY, quatZ, quatW)\n                );\n                splats.setQuaternion(\n                  index2,\n                  quaternion2.x,\n                  quaternion2.y,\n                  quaternion2.z,\n                  quaternion2.w\n                );\n                splats.setOpacity(index2, opacity);\n                splats.setColor(index2, r, g, b);\n              }\n            }\n          );\n          break;\n        case SplatFileType.KSPLAT: {\n          let lastIndex = null;\n          decodeKsplat(\n            input2.fileBytes,\n            (numSplats) => {\n            },\n            (index, x2, y, z, scaleX, scaleY, scaleZ, quatX, quatY, quatZ, quatW, opacity, r, g, b) => {\n              const center = transformPos(new Vector3(x2, y, z));\n              if (withinClip(center) && withinOpacity(opacity)) {\n                lastIndex = splats.pushSplat();\n                splats.setCenter(lastIndex, center.x, center.y, center.z);\n                const scales = transformScales(\n                  new Vector3(scaleX, scaleY, scaleZ)\n                );\n                splats.setScale(lastIndex, scales.x, scales.y, scales.z);\n                const quaternion2 = transformQuaternion(\n                  new Quaternion(quatX, quatY, quatZ, quatW)\n                );\n                splats.setQuaternion(\n                  lastIndex,\n                  quaternion2.x,\n                  quaternion2.y,\n                  quaternion2.z,\n                  quaternion2.w\n                );\n                splats.setOpacity(lastIndex, opacity);\n                splats.setColor(lastIndex, r, g, b);\n              } else {\n                lastIndex = null;\n              }\n            },\n            (index, sh1, sh2, sh3) => {\n              if (lastIndex !== null) {\n                splats.setSh1(lastIndex, sh1);\n                if (sh2) {\n                  splats.setSh2(lastIndex, sh2);\n                }\n                if (sh3) {\n                  splats.setSh3(lastIndex, sh3);\n                }\n              }\n            }\n          );\n          break;\n        }\n        default:\n          throw new Error(`transcodeSpz not implemented for ${fileType}`);\n      }\n    }\n    const shDegree = Math.min(\n      maxSh ?? 3,\n      splats.sh3 ? 3 : splats.sh2 ? 2 : splats.sh1 ? 1 : 0\n    );\n    const spz = new SpzWriter({\n      numSplats: splats.numSplats,\n      shDegree,\n      fractionalBits,\n      flagAntiAlias: true\n    });\n    for (let i2 = 0; i2 < splats.numSplats; ++i2) {\n      const i3 = i2 * 3;\n      const i4 = i2 * 4;\n      spz.setCenter(\n        i2,\n        splats.centers[i3],\n        splats.centers[i3 + 1],\n        splats.centers[i3 + 2]\n      );\n      spz.setScale(\n        i2,\n        splats.scales[i3],\n        splats.scales[i3 + 1],\n        splats.scales[i3 + 2]\n      );\n      spz.setQuat(\n        i2,\n        splats.quaternions[i4],\n        splats.quaternions[i4 + 1],\n        splats.quaternions[i4 + 2],\n        splats.quaternions[i4 + 3]\n      );\n      spz.setAlpha(i2, splats.opacities[i2]);\n      spz.setRgb(\n        i2,\n        splats.colors[i3],\n        splats.colors[i3 + 1],\n        splats.colors[i3 + 2]\n      );\n      if (splats.sh1 && shDegree >= 1) {\n        spz.setSh(\n          i2,\n          splats.sh1.slice(i2 * 9, (i2 + 1) * 9),\n          shDegree >= 2 && splats.sh2 ? splats.sh2.slice(i2 * 15, (i2 + 1) * 15) : void 0,\n          shDegree >= 3 && splats.sh3 ? splats.sh3.slice(i2 * 21, (i2 + 1) * 21) : void 0\n        );\n      }\n    }\n    const spzBytes = await spz.finalize();\n    return { fileBytes: spzBytes, clippedCount: spz.clippedCount };\n  }\n  async function onMessage(event) {\n    const { name, args, id } = event.data;\n    let result = void 0;\n    let error = void 0;\n    try {\n      switch (name) {\n        case "unpackPly": {\n          const { packedArray, fileBytes, splatEncoding } = args;\n          const decoded = await unpackPly({\n            packedArray,\n            fileBytes,\n            splatEncoding\n          });\n          result = {\n            id,\n            numSplats: decoded.numSplats,\n            packedArray: decoded.packedArray,\n            extra: decoded.extra\n          };\n          break;\n        }\n        case "decodeSpz": {\n          const { fileBytes, splatEncoding } = args;\n          const decoded = await unpackSpz(fileBytes, splatEncoding);\n          result = {\n            id,\n            numSplats: decoded.numSplats,\n            packedArray: decoded.packedArray,\n            extra: decoded.extra\n          };\n          break;\n        }\n        case "decodeAntiSplat": {\n          const { fileBytes, splatEncoding } = args;\n          const decoded = unpackAntiSplat(fileBytes, splatEncoding);\n          result = {\n            id,\n            numSplats: decoded.numSplats,\n            packedArray: decoded.packedArray\n          };\n          break;\n        }\n        case "decodeKsplat": {\n          const { fileBytes, splatEncoding } = args;\n          const decoded = unpackKsplat(fileBytes, splatEncoding);\n          result = {\n            id,\n            numSplats: decoded.numSplats,\n            packedArray: decoded.packedArray,\n            extra: decoded.extra\n          };\n          break;\n        }\n        case "decodePcSogs": {\n          const { fileBytes, extraFiles, splatEncoding } = args;\n          const json = JSON.parse(\n            new TextDecoder().decode(fileBytes)\n          );\n          const decoded = await unpackPcSogs(json, extraFiles, splatEncoding);\n          result = {\n            id,\n            numSplats: decoded.numSplats,\n            packedArray: decoded.packedArray,\n            extra: decoded.extra\n          };\n          break;\n        }\n        case "decodePcSogsZip": {\n          const { fileBytes, splatEncoding } = args;\n          const decoded = await unpackPcSogsZip(fileBytes, splatEncoding);\n          result = {\n            id,\n            numSplats: decoded.numSplats,\n            packedArray: decoded.packedArray,\n            extra: decoded.extra\n          };\n          break;\n        }\n        case "sortSplats": {\n          const { totalSplats, readback, ordering } = args;\n          result = {\n            id,\n            readback,\n            ...sortSplats({ totalSplats, readback, ordering })\n          };\n          break;\n        }\n        case "sortDoubleSplats": {\n          const { numSplats, readback, ordering } = args;\n          {\n            result = {\n              id,\n              readback,\n              ordering,\n              activeSplats: sort_splats(numSplats, readback, ordering)\n            };\n          }\n          break;\n        }\n        case "sort32Splats": {\n          const { numSplats, readback, ordering } = args;\n          {\n            result = {\n              id,\n              readback,\n              ordering,\n              activeSplats: sort32_splats(numSplats, readback, ordering)\n            };\n          }\n          break;\n        }\n        case "transcodeSpz": {\n          const input = args;\n          const spzBytes = await transcodeSpz(input);\n          result = {\n            id,\n            fileBytes: spzBytes,\n            input\n          };\n          break;\n        }\n        default: {\n          throw new Error(`Unknown name: ${name}`);\n        }\n      }\n    } catch (e) {\n      error = e;\n      console.error(error);\n    }\n    self.postMessage(\n      { id, result, error },\n      { transfer: getArrayBuffers(result) }\n    );\n  }\n  async function unpackPly({\n    packedArray,\n    fileBytes,\n    splatEncoding\n  }) {\n    const ply = new PlyReader({ fileBytes });\n    await ply.parseHeader();\n    const numSplats = ply.numSplats;\n    const extra = {};\n    ply.parseSplats(\n      (index, x2, y, z, scaleX, scaleY, scaleZ, quatX, quatY, quatZ, quatW, opacity, r, g, b) => {\n        setPackedSplat(\n          packedArray,\n          index,\n          x2,\n          y,\n          z,\n          scaleX,\n          scaleY,\n          scaleZ,\n          quatX,\n          quatY,\n          quatZ,\n          quatW,\n          opacity,\n          r,\n          g,\n          b,\n          splatEncoding\n        );\n      },\n      (index, sh1, sh2, sh3) => {\n        if (sh1) {\n          if (!extra.sh1) {\n            extra.sh1 = new Uint32Array(numSplats * 2);\n          }\n          encodeSh1Rgb(extra.sh1, index, sh1, splatEncoding);\n        }\n        if (sh2) {\n          if (!extra.sh2) {\n            extra.sh2 = new Uint32Array(numSplats * 4);\n          }\n          encodeSh2Rgb(extra.sh2, index, sh2, splatEncoding);\n        }\n        if (sh3) {\n          if (!extra.sh3) {\n            extra.sh3 = new Uint32Array(numSplats * 4);\n          }\n          encodeSh3Rgb(extra.sh3, index, sh3, splatEncoding);\n        }\n      }\n    );\n    return { packedArray, numSplats, extra };\n  }\n  async function unpackSpz(fileBytes, splatEncoding) {\n    const spz = new SpzReader({ fileBytes });\n    await spz.parseHeader();\n    const numSplats = spz.numSplats;\n    const maxSplats = computeMaxSplats(numSplats);\n    const packedArray = new Uint32Array(maxSplats * 4);\n    const extra = {};\n    await spz.parseSplats(\n      (index, x2, y, z) => {\n        setPackedSplatCenter(packedArray, index, x2, y, z);\n      },\n      (index, alpha) => {\n        setPackedSplatOpacity(packedArray, index, alpha);\n      },\n      (index, r, g, b) => {\n        setPackedSplatRgb(packedArray, index, r, g, b, splatEncoding);\n      },\n      (index, scaleX, scaleY, scaleZ) => {\n        setPackedSplatScales(\n          packedArray,\n          index,\n          scaleX,\n          scaleY,\n          scaleZ,\n          splatEncoding\n        );\n      },\n      (index, quatX, quatY, quatZ, quatW) => {\n        setPackedSplatQuat(packedArray, index, quatX, quatY, quatZ, quatW);\n      },\n      (index, sh1, sh2, sh3) => {\n        if (sh1) {\n          if (!extra.sh1) {\n            extra.sh1 = new Uint32Array(numSplats * 2);\n          }\n          encodeSh1Rgb(extra.sh1, index, sh1, splatEncoding);\n        }\n        if (sh2) {\n          if (!extra.sh2) {\n            extra.sh2 = new Uint32Array(numSplats * 4);\n          }\n          encodeSh2Rgb(extra.sh2, index, sh2, splatEncoding);\n        }\n        if (sh3) {\n          if (!extra.sh3) {\n            extra.sh3 = new Uint32Array(numSplats * 4);\n          }\n          encodeSh3Rgb(extra.sh3, index, sh3, splatEncoding);\n        }\n      }\n    );\n    return { packedArray, numSplats, extra };\n  }\n  const DEPTH_INFINITY_F16 = 31744;\n  const DEPTH_SIZE_16 = DEPTH_INFINITY_F16 + 1;\n  let depthArray16 = null;\n  function sortSplats({\n    totalSplats,\n    readback,\n    ordering\n  }) {\n    if (!depthArray16) {\n      depthArray16 = new Uint32Array(DEPTH_SIZE_16);\n    }\n    depthArray16.fill(0);\n    const readbackUint32 = readback.map((layer) => new Uint32Array(layer.buffer));\n    const layerSize = readbackUint32[0].length;\n    const numLayers = Math.ceil(totalSplats / layerSize);\n    let layerBase = 0;\n    for (let layer = 0; layer < numLayers; ++layer) {\n      const readbackLayer = readbackUint32[layer];\n      const layerSplats = Math.min(readbackLayer.length, totalSplats - layerBase);\n      for (let i2 = 0; i2 < layerSplats; ++i2) {\n        const pri = readbackLayer[i2] & 32767;\n        if (pri < DEPTH_INFINITY_F16) {\n          depthArray16[pri] += 1;\n        }\n      }\n      layerBase += layerSplats;\n    }\n    let activeSplats = 0;\n    for (let j = 0; j < DEPTH_SIZE_16; ++j) {\n      const nextIndex = activeSplats + depthArray16[j];\n      depthArray16[j] = activeSplats;\n      activeSplats = nextIndex;\n    }\n    layerBase = 0;\n    for (let layer = 0; layer < numLayers; ++layer) {\n      const readbackLayer = readbackUint32[layer];\n      const layerSplats = Math.min(readbackLayer.length, totalSplats - layerBase);\n      for (let i2 = 0; i2 < layerSplats; ++i2) {\n        const pri = readbackLayer[i2] & 32767;\n        if (pri < DEPTH_INFINITY_F16) {\n          ordering[depthArray16[pri]] = layerBase + i2;\n          depthArray16[pri] += 1;\n        }\n      }\n      layerBase += layerSplats;\n    }\n    if (depthArray16[DEPTH_SIZE_16 - 1] !== activeSplats) {\n      throw new Error(\n        `Expected ${activeSplats} active splats but got ${depthArray16[DEPTH_SIZE_16 - 1]}`\n      );\n    }\n    return { activeSplats, ordering };\n  }\n  const messageBuffer = [];\n  function bufferMessage(event) {\n    messageBuffer.push(event);\n  }\n  async function initialize() {\n    self.addEventListener("message", bufferMessage);\n    await __wbg_init();\n    self.removeEventListener("message", bufferMessage);\n    self.addEventListener("message", onMessage);\n    for (const event of messageBuffer) {\n      onMessage(event);\n    }\n    messageBuffer.length = 0;\n  }\n  initialize().catch(console.error);\n})();\n//# sourceMappingURL=worker-CaMzlx2k.js.map\n';
const blob = typeof self !== "undefined" && self.Blob && new Blob([jsContent], { type: "text/javascript;charset=utf-8" });
function WorkerWrapper(options) {
  let objURL;
  try {
    objURL = blob && (self.URL || self.webkitURL).createObjectURL(blob);
    if (!objURL) throw "";
    const worker = new Worker(objURL, {
      name: options == null ? void 0 : options.name
    });
    worker.addEventListener("error", () => {
      (self.URL || self.webkitURL).revokeObjectURL(objURL);
    });
    return worker;
  } catch (e) {
    return new Worker(
      "data:text/javascript;charset=utf-8," + encodeURIComponent(jsContent),
      {
        name: options == null ? void 0 : options.name
      }
    );
  } finally {
    objURL && (self.URL || self.webkitURL).revokeObjectURL(objURL);
  }
}
__name(WorkerWrapper, "WorkerWrapper");
class SplatWorker {
  static {
    __name(this, "SplatWorker");
  }
  constructor() {
    this.messages = {};
    this.messageIdNext = 0;
    this.worker = new WorkerWrapper();
    this.worker.onmessage = (event) => this.onMessage(event);
  }
  makeMessageId() {
    return ++this.messageIdNext;
  }
  makeMessagePromiseId() {
    const id = this.makeMessageId();
    const promise = new Promise((resolve, reject) => {
      this.messages[id] = { resolve, reject };
    });
    return { id, promise };
  }
  onMessage(event) {
    const { id, result, error } = event.data;
    const handler = this.messages[id];
    if (handler) {
      delete this.messages[id];
      if (error) {
        handler.reject(error);
      } else {
        handler.resolve(result);
      }
    }
  }
  // Invoke an RPC on the worker with the given name and arguments.
  // The normal usage of a worker is to run one activity at a time,
  // but this function allows for concurrent calls, tagging each request
  // with a unique message Id and awaiting a response to that same Id.
  // The method will automatically transfer any ArrayBuffers in the
  // arguments to the worker. If you'd like to transfer a copy of a
  // buffer then you must clone it before passing to this function.
  async call(name, args) {
    const { id, promise } = this.makeMessagePromiseId();
    this.worker.postMessage(
      { name, args, id },
      { transfer: getArrayBuffers(args) }
    );
    return promise;
  }
}
let maxWorkers = 4;
let numWorkers = 0;
const freeWorkers = [];
const workerQueue = [];
async function allocWorker() {
  const worker = freeWorkers.shift();
  if (worker) {
    return worker;
  }
  if (numWorkers < maxWorkers) {
    const worker2 = new SplatWorker();
    numWorkers += 1;
    return worker2;
  }
  return new Promise((resolve) => {
    workerQueue.push(resolve);
  });
}
__name(allocWorker, "allocWorker");
function freeWorker(worker) {
  if (numWorkers > maxWorkers) {
    numWorkers -= 1;
    return;
  }
  const waiter = workerQueue.shift();
  if (waiter) {
    waiter(worker);
    return;
  }
  freeWorkers.push(worker);
}
__name(freeWorker, "freeWorker");
async function withWorker(callback) {
  const worker = await allocWorker();
  try {
    return await callback(worker);
  } finally {
    freeWorker(worker);
  }
}
__name(withWorker, "withWorker");
class SplatLoader extends Loader {
  static {
    __name(this, "SplatLoader");
  }
  constructor(manager) {
    super(manager);
    this.fileLoader = new FileLoader(manager);
  }
  load(url, onLoad, onProgress, onError) {
    const resolvedURL = this.manager.resolveURL(
      (this.path ?? "") + (url ?? "")
    );
    const headers = new Headers(this.requestHeader);
    const credentials = this.withCredentials ? "include" : "same-origin";
    const request = new Request(resolvedURL, { headers, credentials });
    let fileType = this.fileType;
    this.manager.itemStart(resolvedURL);
    fetchWithProgress(request, onProgress).then(async (input) => {
      var _a2;
      const progresses = [
        new ProgressEvent("progress", {
          lengthComputable: true,
          loaded: input.byteLength,
          total: input.byteLength
        })
      ];
      function updateProgresses() {
        if (onProgress) {
          const lengthComputable = progresses.every((p) => {
            return p.lengthComputable || p.loaded === 0 && p.total === 0;
          });
          const loaded = progresses.reduce((sum, p) => sum + p.loaded, 0);
          const total = progresses.reduce((sum, p) => sum + p.total, 0);
          onProgress(
            new ProgressEvent("progress", {
              lengthComputable,
              loaded,
              total
            })
          );
        }
      }
      __name(updateProgresses, "updateProgresses");
      const extraFiles = {};
      const promises = [];
      const pcSogsJson = tryPcSogs(input);
      if (fileType === "pcsogs") {
        if (pcSogsJson === void 0) {
          throw new Error("Invalid PC SOGS file");
        }
      }
      if (pcSogsJson !== void 0) {
        fileType = "pcsogs";
        for (const key of ["means", "scales", "quats", "sh0", "shN"]) {
          const prop = pcSogsJson[key];
          if (prop) {
            for (const file of prop.files) {
              const fileUrl = new URL(file, resolvedURL).toString();
              const progressIndex = progresses.length;
              progresses.push(new ProgressEvent("progress"));
              this.manager.itemStart(fileUrl);
              const request2 = new Request(fileUrl, { headers, credentials });
              const promise = fetchWithProgress(request2, (progress) => {
                progresses[progressIndex] = progress;
                updateProgresses();
              }).then((data) => {
                extraFiles[file] = data;
              }).catch((error) => {
                this.manager.itemError(fileUrl);
                throw error;
              }).finally(() => {
                this.manager.itemEnd(fileUrl);
              });
              promises.push(promise);
            }
          }
        }
      }
      await Promise.all(promises);
      if (onLoad) {
        const splatEncoding = ((_a2 = this.packedSplats) == null ? void 0 : _a2.splatEncoding) ?? DEFAULT_SPLAT_ENCODING;
        const decoded = await unpackSplats({
          input,
          extraFiles,
          fileType,
          pathOrUrl: resolvedURL,
          splatEncoding
        });
        if (this.packedSplats) {
          this.packedSplats.initialize(decoded);
          onLoad(this.packedSplats);
        } else {
          onLoad(new PackedSplats(decoded));
        }
      }
    }).catch((error) => {
      this.manager.itemError(resolvedURL);
      onError == null ? void 0 : onError(error);
    }).finally(() => {
      this.manager.itemEnd(resolvedURL);
    });
  }
  async loadAsync(url, onProgress) {
    return new Promise((resolve, reject) => {
      this.load(
        url,
        (decoded) => {
          resolve(decoded);
        },
        onProgress,
        reject
      );
    });
  }
  parse(packedSplats) {
    return new SplatMesh({ packedSplats });
  }
}
async function fetchWithProgress(request, onProgress) {
  const response = await fetch(request);
  if (!response.ok) {
    throw new Error(
      `${response.status} "${response.statusText}" fetching URL: ${request.url}`
    );
  }
  if (!response.body) {
    throw new Error(`Response body is null for URL: ${request.url}`);
  }
  const reader = response.body.getReader();
  const contentLength = Number.parseInt(
    response.headers.get("Content-Length") || "0"
  );
  const total = Number.isNaN(contentLength) ? 0 : contentLength;
  let loaded = 0;
  const chunks = [];
  while (true) {
    const { done, value } = await reader.read();
    if (done) {
      break;
    }
    chunks.push(value);
    loaded += value.length;
    if (onProgress) {
      onProgress(
        new ProgressEvent("progress", {
          lengthComputable: total !== 0,
          loaded,
          total
        })
      );
    }
  }
  const bytes = new Uint8Array(loaded);
  let offset = 0;
  for (const chunk of chunks) {
    bytes.set(chunk, offset);
    offset += chunk.length;
  }
  return bytes.buffer;
}
__name(fetchWithProgress, "fetchWithProgress");
function getSplatFileType(fileBytes) {
  const view = new DataView(fileBytes.buffer);
  if ((view.getUint32(0, true) & 16777215) === 7957616) {
    return "ply";
  }
  if ((view.getUint32(0, true) & 16777215) === 559903) {
    const header = decompressPartialGzip(fileBytes, 4);
    const gView = new DataView(header.buffer);
    if (gView.getUint32(0, true) === 1347635022) {
      return "spz";
    }
    return void 0;
  }
  if (view.getUint32(0, true) === 67324752) {
    if (tryPcSogsZip(fileBytes)) {
      return "pcsogszip";
    }
    return void 0;
  }
  return void 0;
}
__name(getSplatFileType, "getSplatFileType");
function getFileExtension(pathOrUrl) {
  const noTrailing = pathOrUrl.split(/[?#]/, 1)[0];
  const lastSlash = Math.max(
    noTrailing.lastIndexOf("/"),
    noTrailing.lastIndexOf("\\")
  );
  const filename = noTrailing.slice(lastSlash + 1);
  const lastDot = filename.lastIndexOf(".");
  if (lastDot <= 0 || lastDot === filename.length - 1) {
    return "";
  }
  return filename.slice(lastDot + 1).toLowerCase();
}
__name(getFileExtension, "getFileExtension");
function getSplatFileTypeFromPath(pathOrUrl) {
  const extension = getFileExtension(pathOrUrl);
  if (extension === "ply") {
    return "ply";
  }
  if (extension === "spz") {
    return "spz";
  }
  if (extension === "splat") {
    return "splat";
  }
  if (extension === "ksplat") {
    return "ksplat";
  }
  if (extension === "sog") {
    return "pcsogszip";
  }
  return void 0;
}
__name(getSplatFileTypeFromPath, "getSplatFileTypeFromPath");
function tryPcSogs(input) {
  try {
    let text;
    if (typeof input === "string") {
      text = input;
    } else {
      const fileBytes = input instanceof ArrayBuffer ? new Uint8Array(input) : input;
      if (fileBytes.length > 65536) {
        return void 0;
      }
      text = new TextDecoder().decode(fileBytes);
    }
    const json = JSON.parse(text);
    if (!json || typeof json !== "object" || Array.isArray(json)) {
      return void 0;
    }
    const isVersion2 = json.version === 2;
    for (const key of ["means", "scales", "quats", "sh0"]) {
      if (!json[key] || typeof json[key] !== "object" || Array.isArray(json[key])) {
        return void 0;
      }
      if (isVersion2) {
        if (!json[key].files) {
          return void 0;
        }
        if ((key === "scales" || key === "sh0") && !json[key].codebook) {
          return void 0;
        }
        if (key === "means" && (!json[key].mins || !json[key].maxs)) {
          return void 0;
        }
      } else {
        if (!json[key].shape || !json[key].files) {
          return void 0;
        }
        if (key !== "quats" && (!json[key].mins || !json[key].maxs)) {
          return void 0;
        }
      }
    }
    return json;
  } catch {
    return void 0;
  }
}
__name(tryPcSogs, "tryPcSogs");
function tryPcSogsZip(input) {
  try {
    const fileBytes = input instanceof ArrayBuffer ? new Uint8Array(input) : input;
    let metaFilename = null;
    const unzipped = unzipSync(fileBytes, {
      filter: /* @__PURE__ */ __name(({ name }) => {
        const filename = name.split(/[\\/]/).pop();
        if (filename === "meta.json") {
          metaFilename = name;
          return true;
        }
        return false;
      }, "filter")
    });
    if (!metaFilename) {
      return void 0;
    }
    const json = tryPcSogs(unzipped[metaFilename]);
    if (!json) {
      return void 0;
    }
    return { name: metaFilename, json };
  } catch {
    return void 0;
  }
}
__name(tryPcSogsZip, "tryPcSogsZip");
async function unpackSplats({
  input,
  extraFiles,
  fileType,
  pathOrUrl,
  splatEncoding
}) {
  const fileBytes = input instanceof ArrayBuffer ? new Uint8Array(input) : input;
  let splatFileType = fileType;
  if (!fileType) {
    splatFileType = getSplatFileType(fileBytes);
    if (!splatFileType && pathOrUrl) {
      splatFileType = getSplatFileTypeFromPath(pathOrUrl);
    }
  }
  switch (splatFileType) {
    case "ply": {
      const ply = new PlyReader({ fileBytes });
      await ply.parseHeader();
      const numSplats = ply.numSplats;
      const maxSplats = getTextureSize(numSplats).maxSplats;
      const args = {
        fileBytes,
        packedArray: new Uint32Array(maxSplats * 4),
        splatEncoding
      };
      return await withWorker(async (worker) => {
        const { packedArray, numSplats: numSplats2, extra } = await worker.call(
          "unpackPly",
          args
        );
        return { packedArray, numSplats: numSplats2, extra };
      });
    }
    case "spz": {
      return await withWorker(async (worker) => {
        const { packedArray, numSplats, extra } = await worker.call(
          "decodeSpz",
          {
            fileBytes,
            splatEncoding
          }
        );
        return { packedArray, numSplats, extra };
      });
    }
    case "splat": {
      return await withWorker(async (worker) => {
        const { packedArray, numSplats } = await worker.call(
          "decodeAntiSplat",
          {
            fileBytes,
            splatEncoding
          }
        );
        return { packedArray, numSplats };
      });
    }
    case "ksplat": {
      return await withWorker(async (worker) => {
        const { packedArray, numSplats, extra } = await worker.call(
          "decodeKsplat",
          { fileBytes, splatEncoding }
        );
        return { packedArray, numSplats, extra };
      });
    }
    case "pcsogs": {
      return await withWorker(async (worker) => {
        const { packedArray, numSplats, extra } = await worker.call(
          "decodePcSogs",
          { fileBytes, extraFiles, splatEncoding }
        );
        return { packedArray, numSplats, extra };
      });
    }
    case "pcsogszip": {
      return await withWorker(async (worker) => {
        const { packedArray, numSplats, extra } = await worker.call(
          "decodePcSogsZip",
          { fileBytes, splatEncoding }
        );
        return { packedArray, numSplats, extra };
      });
    }
    default: {
      throw new Error(`Unknown splat file type: ${splatFileType}`);
    }
  }
}
__name(unpackSplats, "unpackSplats");
var computeUvec4_default = "precision highp float;\nprecision highp int;\nprecision highp sampler2D;\nprecision highp usampler2D;\nprecision highp isampler2D;\nprecision highp sampler2DArray;\nprecision highp usampler2DArray;\nprecision highp isampler2DArray;\nprecision highp sampler3D;\nprecision highp usampler3D;\nprecision highp isampler3D;\n\n#include <splatDefines>\n\nuniform uint targetLayer;\nuniform int targetBase;\nuniform int targetCount;\n\nout uvec4 target;\n\n{{ GLOBALS }}\n\nvoid produceSplat(int index) {\n    {{ STATEMENTS }}\n}\n\nvoid main() {\n    int targetIndex = int(targetLayer << SPLAT_TEX_LAYER_BITS) + int(uint(gl_FragCoord.y) << SPLAT_TEX_WIDTH_BITS) + int(gl_FragCoord.x);\n    int index = targetIndex - targetBase;\n\n    if ((index >= 0) && (index < targetCount)) {\n        produceSplat(index);\n    } else {\n        target = uvec4(0u, 0u, 0u, 0u);\n    }\n}";
const DEFAULT_SPLAT_ENCODING = {
  rgbMin: 0,
  rgbMax: 1,
  lnScaleMin: LN_SCALE_MIN,
  lnScaleMax: LN_SCALE_MAX,
  sh1Min: -1,
  sh1Max: 1,
  sh2Min: -1,
  sh2Max: 1,
  sh3Min: -1,
  sh3Max: 1
};
const _PackedSplats = class _PackedSplats2 {
  static {
    __name(this, "_PackedSplats");
  }
  constructor(options = {}) {
    this.maxSplats = 0;
    this.numSplats = 0;
    this.packedArray = null;
    this.isInitialized = false;
    this.target = null;
    this.source = null;
    this.needsUpdate = true;
    this.extra = {};
    this.dyno = new DynoPackedSplats({ packedSplats: this });
    this.dynoRgbMinMaxLnScaleMinMax = new DynoVec4({
      key: "rgbMinMaxLnScaleMinMax",
      value: new Vector4(0, 1, LN_SCALE_MIN, LN_SCALE_MAX),
      update: /* @__PURE__ */ __name((value) => {
        var _a2, _b2, _c, _d;
        value.set(
          ((_a2 = this.splatEncoding) == null ? void 0 : _a2.rgbMin) ?? 0,
          ((_b2 = this.splatEncoding) == null ? void 0 : _b2.rgbMax) ?? 1,
          ((_c = this.splatEncoding) == null ? void 0 : _c.lnScaleMin) ?? LN_SCALE_MIN,
          ((_d = this.splatEncoding) == null ? void 0 : _d.lnScaleMax) ?? LN_SCALE_MAX
        );
        return value;
      }, "update")
    });
    this.dynoSh1MinMax = new DynoVec2({
      key: "sh1MinMax",
      value: new Vector2(-1, 1),
      update: /* @__PURE__ */ __name((value) => {
        var _a2, _b2;
        value.set(
          ((_a2 = this.splatEncoding) == null ? void 0 : _a2.sh1Min) ?? -1,
          ((_b2 = this.splatEncoding) == null ? void 0 : _b2.sh1Max) ?? 1
        );
        return value;
      }, "update")
    });
    this.dynoSh2MinMax = new DynoVec2({
      key: "sh2MinMax",
      value: new Vector2(-1, 1),
      update: /* @__PURE__ */ __name((value) => {
        var _a2, _b2;
        value.set(
          ((_a2 = this.splatEncoding) == null ? void 0 : _a2.sh2Min) ?? -1,
          ((_b2 = this.splatEncoding) == null ? void 0 : _b2.sh2Max) ?? 1
        );
        return value;
      }, "update")
    });
    this.dynoSh3MinMax = new DynoVec2({
      key: "sh3MinMax",
      value: new Vector2(-1, 1),
      update: /* @__PURE__ */ __name((value) => {
        var _a2, _b2;
        value.set(
          ((_a2 = this.splatEncoding) == null ? void 0 : _a2.sh3Min) ?? -1,
          ((_b2 = this.splatEncoding) == null ? void 0 : _b2.sh3Max) ?? 1
        );
        return value;
      }, "update")
    });
    this.initialized = Promise.resolve(this);
    this.reinitialize(options);
  }
  reinitialize(options) {
    this.isInitialized = false;
    this.extra = {};
    this.splatEncoding = options.splatEncoding;
    if (options.url || options.fileBytes || options.construct) {
      this.initialized = this.asyncInitialize(options).then(() => {
        this.isInitialized = true;
        return this;
      });
    } else {
      this.initialize(options);
      this.isInitialized = true;
      this.initialized = Promise.resolve(this);
    }
  }
  initialize(options) {
    if (options.packedArray) {
      this.packedArray = options.packedArray;
      this.maxSplats = Math.floor(this.packedArray.length / 4);
      this.maxSplats = Math.floor(this.maxSplats / SPLAT_TEX_WIDTH) * SPLAT_TEX_WIDTH;
      this.numSplats = Math.min(
        this.maxSplats,
        options.numSplats ?? Number.POSITIVE_INFINITY
      );
    } else {
      this.maxSplats = options.maxSplats ?? 0;
      this.numSplats = 0;
    }
    this.extra = options.extra ?? {};
  }
  async asyncInitialize(options) {
    const { url, fileBytes, construct } = options;
    if (url) {
      const loader = new SplatLoader();
      loader.packedSplats = this;
      await loader.loadAsync(url);
    } else if (fileBytes) {
      const unpacked = await unpackSplats({
        input: fileBytes,
        fileType: options.fileType,
        pathOrUrl: options.fileName ?? url,
        splatEncoding: options.splatEncoding ?? DEFAULT_SPLAT_ENCODING
      });
      this.initialize(unpacked);
    }
    if (construct) {
      const maybePromise = construct(this);
      if (maybePromise instanceof Promise) {
        await maybePromise;
      }
    }
  }
  // Call this when you are finished with the PackedSplats and want to free
  // any buffers it holds.
  dispose() {
    if (this.target) {
      this.target.dispose();
      this.target = null;
    }
    if (this.source) {
      this.source.dispose();
      this.source = null;
    }
  }
  // Ensures that this.packedArray can fit numSplats Gsplats. If it's too small,
  // resize exponentially and copy over the original data.
  //
  // Typically you don't need to call this, because calling this.setSplat(index, ...)
  // and this.pushSplat(...) will automatically call ensureSplats() so we have
  // enough splats.
  ensureSplats(numSplats) {
    const targetSize = numSplats <= this.maxSplats ? this.maxSplats : (
      // Grow exponentially to avoid frequent reallocations
      Math.max(numSplats, 2 * this.maxSplats)
    );
    const currentSize = !this.packedArray ? 0 : this.packedArray.length / 4;
    if (!this.packedArray || targetSize > currentSize) {
      this.maxSplats = getTextureSize(targetSize).maxSplats;
      const newArray2 = new Uint32Array(this.maxSplats * 4);
      if (this.packedArray) {
        newArray2.set(this.packedArray);
      }
      this.packedArray = newArray2;
    }
    return this.packedArray;
  }
  // Ensure the extra array for the given level is large enough to hold numSplats
  ensureSplatsSh(level, numSplats) {
    let wordsPerSplat;
    let key;
    if (level === 0) {
      return this.ensureSplats(numSplats);
    }
    if (level === 1) {
      wordsPerSplat = 2;
      key = "sh1";
    } else if (level === 2) {
      wordsPerSplat = 4;
      key = "sh2";
    } else if (level === 3) {
      wordsPerSplat = 4;
      key = "sh3";
    } else {
      throw new Error(`Invalid level: ${level}`);
    }
    let maxSplats = !this.extra[key] ? 0 : this.extra[key].length / wordsPerSplat;
    const targetSize = numSplats <= maxSplats ? maxSplats : Math.max(numSplats, 2 * maxSplats);
    if (!this.extra[key] || targetSize > maxSplats) {
      maxSplats = getTextureSize(targetSize).maxSplats;
      const newArray2 = new Uint32Array(maxSplats * wordsPerSplat);
      if (this.extra[key]) {
        newArray2.set(this.extra[key]);
      }
      this.extra[key] = newArray2;
    }
    return this.extra[key];
  }
  // Unpack the 16-byte Gsplat data at index into the Three.js components
  // center: THREE.Vector3, scales: THREE.Vector3, quaternion: THREE.Quaternion,
  // opacity: number 0..1, color: THREE.Color 0..1.
  getSplat(index) {
    if (!this.packedArray || index >= this.numSplats) {
      throw new Error("Invalid index");
    }
    return unpackSplat(this.packedArray, index, this.splatEncoding);
  }
  // Set all PackedSplat components at index with the provided Gsplat attributes
  // (can be the same objects returned by getSplat). Ensures there is capacity
  // for at least index+1 Gsplats.
  setSplat(index, center, scales, quaternion, opacity, color) {
    const packedSplats = this.ensureSplats(index + 1);
    setPackedSplat(
      packedSplats,
      index,
      center.x,
      center.y,
      center.z,
      scales.x,
      scales.y,
      scales.z,
      quaternion.x,
      quaternion.y,
      quaternion.z,
      quaternion.w,
      opacity,
      color.r,
      color.g,
      color.b
    );
    this.numSplats = Math.max(this.numSplats, index + 1);
  }
  // Effectively calls this.setSplat(this.numSplats++, center, ...), useful on
  // construction where you just want to iterate and create a collection of Gsplats.
  pushSplat(center, scales, quaternion, opacity, color) {
    const packedSplats = this.ensureSplats(this.numSplats + 1);
    setPackedSplat(
      packedSplats,
      this.numSplats,
      center.x,
      center.y,
      center.z,
      scales.x,
      scales.y,
      scales.z,
      quaternion.x,
      quaternion.y,
      quaternion.z,
      quaternion.w,
      opacity,
      color.r,
      color.g,
      color.b
    );
    ++this.numSplats;
  }
  // Iterate over Gsplats index 0..=(this.numSplats-1), unpack each Gsplat
  // and invoke the callback function with the Gsplat attributes.
  forEachSplat(callback) {
    if (!this.packedArray || !this.numSplats) {
      return;
    }
    for (let i = 0; i < this.numSplats; ++i) {
      const unpacked = unpackSplat(this.packedArray, i, this.splatEncoding);
      callback(
        i,
        unpacked.center,
        unpacked.scales,
        unpacked.quaternion,
        unpacked.opacity,
        unpacked.color
      );
    }
  }
  // Ensures our PackedSplats.target render target has enough space to generate
  // maxSplats total Gsplats, and reallocate if not large enough.
  ensureGenerate(maxSplats) {
    if (this.target && (maxSplats ?? 1) <= this.maxSplats) {
      return false;
    }
    this.dispose();
    const textureSize2 = getTextureSize(maxSplats ?? 1);
    const { width, height, depth } = textureSize2;
    this.maxSplats = textureSize2.maxSplats;
    this.target = new WebGLArrayRenderTarget(width, height, depth, {
      depthBuffer: false,
      stencilBuffer: false,
      generateMipmaps: false,
      magFilter: NearestFilter,
      minFilter: NearestFilter
    });
    this.target.texture.format = RGBAIntegerFormat;
    this.target.texture.type = UnsignedIntType;
    this.target.texture.internalFormat = "RGBA32UI";
    this.target.scissorTest = true;
    return true;
  }
  // Given an array of splatCounts (.numSplats for each
  // SplatGenerator/SplatMesh in the scene), compute a
  // "mapping layout" in the composite array of generated outputs.
  generateMapping(splatCounts) {
    let maxSplats = 0;
    const mapping = splatCounts.map((numSplats) => {
      const base = maxSplats;
      const rounded = Math.ceil(numSplats / SPLAT_TEX_WIDTH) * SPLAT_TEX_WIDTH;
      maxSplats += rounded;
      return { base, count: numSplats };
    });
    return { maxSplats, mapping };
  }
  // Returns a THREE.DataArrayTexture representing the PackedSplats content as
  // a Uint32x4 data array texture (2048 x 2048 x depth in size)
  getTexture() {
    if (this.target) {
      return this.target.texture;
    }
    if (this.source || this.packedArray) {
      const source = this.maybeUpdateSource();
      return source;
    }
    return _PackedSplats2.getEmpty();
  }
  // Check if source texture needs to be created/updated
  maybeUpdateSource() {
    if (!this.packedArray) {
      throw new Error("No packed splats");
    }
    if (this.needsUpdate || !this.source) {
      this.needsUpdate = false;
      if (this.source) {
        const { width, height, depth } = this.source.image;
        if (this.maxSplats !== width * height * depth) {
          this.source.dispose();
          this.source = null;
        }
      }
      if (!this.source) {
        const { width, height, depth } = getTextureSize(this.maxSplats);
        this.source = new DataArrayTexture(
          this.packedArray,
          width,
          height,
          depth
        );
        this.source.format = RGBAIntegerFormat;
        this.source.type = UnsignedIntType;
        this.source.internalFormat = "RGBA32UI";
        this.source.needsUpdate = true;
      } else if (this.packedArray.buffer !== this.source.image.data.buffer) {
        this.source.image.data = new Uint8Array(this.packedArray.buffer);
      }
      this.source.needsUpdate = true;
    }
    return this.source;
  }
  // Can be used where you need an uninitialized THREE.DataArrayTexture like
  // a uniform you will update with the result of this.getTexture() later.
  static getEmpty() {
    if (!_PackedSplats2.emptySource) {
      const { width, height, depth, maxSplats } = getTextureSize(1);
      const emptyArray = new Uint32Array(maxSplats * 4);
      _PackedSplats2.emptySource = new DataArrayTexture(
        emptyArray,
        width,
        height,
        depth
      );
      _PackedSplats2.emptySource.format = RGBAIntegerFormat;
      _PackedSplats2.emptySource.type = UnsignedIntType;
      _PackedSplats2.emptySource.internalFormat = "RGBA32UI";
      _PackedSplats2.emptySource.needsUpdate = true;
    }
    return _PackedSplats2.emptySource;
  }
  // Get a program and THREE.RawShaderMaterial for a given GsplatGenerator,
  // generating it if necessary and caching the result.
  prepareProgramMaterial(generator) {
    let program = _PackedSplats2.generatorProgram.get(generator);
    if (!program) {
      const graph = dynoBlock(
        { index: "int" },
        { output: "uvec4" },
        ({ index }) => {
          generator.inputs.index = index;
          const gsplat = generator.outputs.gsplat;
          const output = outputPackedSplat(
            gsplat,
            this.dynoRgbMinMaxLnScaleMinMax
          );
          return { output };
        }
      );
      if (!_PackedSplats2.programTemplate) {
        _PackedSplats2.programTemplate = new DynoProgramTemplate(
          computeUvec4_default
        );
      }
      program = new DynoProgram({
        graph,
        inputs: { index: "index" },
        outputs: { output: "target" },
        template: _PackedSplats2.programTemplate
      });
      Object.assign(program.uniforms, {
        targetLayer: { value: 0 },
        targetBase: { value: 0 },
        targetCount: { value: 0 }
      });
      _PackedSplats2.generatorProgram.set(generator, program);
    }
    const material = program.prepareMaterial();
    _PackedSplats2.fullScreenQuad.material = material;
    return { program, material };
  }
  saveRenderState(renderer) {
    return {
      xrEnabled: renderer.xr.enabled,
      autoClear: renderer.autoClear
    };
  }
  resetRenderState(renderer, state) {
    renderer.setRenderTarget(null);
    renderer.xr.enabled = state.xrEnabled;
    renderer.autoClear = state.autoClear;
  }
  // Executes a dyno program specified by generator which is any DynoBlock that
  // maps { index: "int" } to { gsplat: Gsplat }. This is called in
  // SparkRenderer.updateInternal() to re-generate Gsplats in the scene for
  // SplatGenerator instances whose version is newer than what was generated
  // for it last time.
  generate({
    generator,
    base,
    count,
    renderer
  }) {
    if (!this.target) {
      throw new Error("Target must be initialized with ensureSplats");
    }
    if (base + count > this.maxSplats) {
      throw new Error("Base + count exceeds maxSplats");
    }
    const { program, material } = this.prepareProgramMaterial(generator);
    program.update();
    const renderState = this.saveRenderState(renderer);
    const nextBase = Math.ceil((base + count) / SPLAT_TEX_WIDTH) * SPLAT_TEX_WIDTH;
    const layerSize = SPLAT_TEX_WIDTH * SPLAT_TEX_HEIGHT;
    material.uniforms.targetBase.value = base;
    material.uniforms.targetCount.value = count;
    while (base < nextBase) {
      const layer = Math.floor(base / layerSize);
      material.uniforms.targetLayer.value = layer;
      const layerBase = layer * layerSize;
      const layerYStart = Math.floor((base - layerBase) / SPLAT_TEX_WIDTH);
      const layerYEnd = Math.min(
        SPLAT_TEX_HEIGHT,
        Math.ceil((nextBase - layerBase) / SPLAT_TEX_WIDTH)
      );
      this.target.scissor.set(
        0,
        layerYStart,
        SPLAT_TEX_WIDTH,
        layerYEnd - layerYStart
      );
      renderer.setRenderTarget(this.target, layer);
      renderer.xr.enabled = false;
      renderer.autoClear = false;
      _PackedSplats2.fullScreenQuad.render(renderer);
      base += SPLAT_TEX_WIDTH * (layerYEnd - layerYStart);
    }
    this.resetRenderState(renderer, renderState);
    return { nextBase };
  }
};
_PackedSplats.emptySource = null;
_PackedSplats.programTemplate = null;
_PackedSplats.generatorProgram = /* @__PURE__ */ new Map();
_PackedSplats.fullScreenQuad = new FullScreenQuad(
  new RawShaderMaterial({ visible: false })
);
let PackedSplats = _PackedSplats;
class DynoPackedSplats extends DynoUniform {
  static {
    __name(this, "DynoPackedSplats");
  }
  constructor({ packedSplats } = {}) {
    super({
      key: "packedSplats",
      type: TPackedSplats,
      globals: /* @__PURE__ */ __name(() => [definePackedSplats], "globals"),
      value: {
        texture: PackedSplats.getEmpty(),
        numSplats: 0,
        rgbMinMaxLnScaleMinMax: new Vector4(
          0,
          1,
          LN_SCALE_MIN,
          LN_SCALE_MAX
        )
      },
      update: /* @__PURE__ */ __name((value) => {
        var _a2, _b2, _c, _d, _e, _f, _g, _h, _i, _j;
        value.texture = ((_a2 = this.packedSplats) == null ? void 0 : _a2.getTexture()) ?? PackedSplats.getEmpty();
        value.numSplats = ((_b2 = this.packedSplats) == null ? void 0 : _b2.numSplats) ?? 0;
        value.rgbMinMaxLnScaleMinMax.set(
          ((_d = (_c = this.packedSplats) == null ? void 0 : _c.splatEncoding) == null ? void 0 : _d.rgbMin) ?? 0,
          ((_f = (_e = this.packedSplats) == null ? void 0 : _e.splatEncoding) == null ? void 0 : _f.rgbMax) ?? 1,
          ((_h = (_g = this.packedSplats) == null ? void 0 : _g.splatEncoding) == null ? void 0 : _h.lnScaleMin) ?? LN_SCALE_MIN,
          ((_j = (_i = this.packedSplats) == null ? void 0 : _i.splatEncoding) == null ? void 0 : _j.lnScaleMax) ?? LN_SCALE_MAX
        );
        return value;
      }, "update")
    });
    this.packedSplats = packedSplats;
  }
}
class SplatGeometry extends InstancedBufferGeometry {
  static {
    __name(this, "SplatGeometry");
  }
  constructor(ordering, activeSplats) {
    super();
    this.ordering = ordering;
    this.setAttribute("position", new BufferAttribute(QUAD_VERTICES, 3));
    this.setIndex(new BufferAttribute(QUAD_INDICES, 1));
    this._maxInstanceCount = ordering.length;
    this.instanceCount = activeSplats;
    this.attribute = new InstancedBufferAttribute(ordering, 1, false, 1);
    this.attribute.setUsage(DynamicDrawUsage);
    this.setAttribute("splatIndex", this.attribute);
  }
  update(ordering, activeSplats) {
    this.ordering = ordering;
    this.attribute.array = ordering;
    this.instanceCount = activeSplats;
    this.attribute.addUpdateRange(0, activeSplats);
    this.attribute.needsUpdate = true;
  }
}
const QUAD_VERTICES = new Float32Array([
  -1,
  -1,
  0,
  1,
  -1,
  0,
  1,
  1,
  0,
  -1,
  1,
  0
]);
const QUAD_INDICES = new Uint16Array([0, 1, 2, 0, 2, 3]);
const _SparkViewpoint = class _SparkViewpoint2 {
  static {
    __name(this, "_SparkViewpoint");
  }
  constructor(options) {
    this.lastTime = null;
    this.encodeLinear = false;
    this.superXY = 1;
    this.display = null;
    this.sorting = null;
    this.pending = null;
    this.sortingCheck = false;
    this.readback16 = new Uint16Array(0);
    this.readback32 = new Uint32Array(0);
    this.spark = options.spark;
    this.camera = options.camera;
    this.viewToWorld = options.viewToWorld ?? new Matrix4();
    if (options.target) {
      const { width, height, doubleBuffer } = options.target;
      const superXY = Math.max(1, Math.min(4, options.target.superXY ?? 1));
      this.superXY = superXY;
      if (width * superXY > 8192 || height * superXY > 8192) {
        throw new Error("Target size too large");
      }
      this.target = new WebGLRenderTarget(
        width * superXY,
        height * superXY,
        {
          format: RGBAFormat,
          type: UnsignedByteType,
          colorSpace: SRGBColorSpace
        }
      );
      if (doubleBuffer) {
        this.back = new WebGLRenderTarget(
          width * superXY,
          height * superXY,
          {
            format: RGBAFormat,
            type: UnsignedByteType,
            colorSpace: SRGBColorSpace
          }
        );
      }
      this.encodeLinear = true;
    }
    this.onTextureUpdated = options.onTextureUpdated;
    this.sortRadial = options.sortRadial ?? true;
    this.sortDistance = options.sortDistance;
    this.sortCoorient = options.sortCoorient;
    this.depthBias = options.depthBias;
    this.sort360 = options.sort360;
    this.sort32 = options.sort32;
    this.stochastic = options.stochastic ?? false;
    this.orderingFreelist = new FreeList({
      allocate: /* @__PURE__ */ __name((maxSplats) => new Uint32Array(maxSplats), "allocate"),
      valid: /* @__PURE__ */ __name((ordering, maxSplats) => ordering.length === maxSplats, "valid")
    });
    this.autoUpdate = false;
    this.setAutoUpdate(options.autoUpdate ?? false);
  }
  // Call this when you are done with the SparkViewpoint and want to
  // free up its resources (GPU targets, pixel buffers, etc.)
  dispose() {
    var _a2;
    this.setAutoUpdate(false);
    if (this.target) {
      this.target.dispose();
      this.target = void 0;
    }
    if (this.back) {
      this.back.dispose();
      this.back = void 0;
    }
    if (this.display) {
      this.spark.releaseAccumulator(this.display.accumulator);
      this.display.geometry.dispose();
      this.display = null;
    }
    if ((_a2 = this.pending) == null ? void 0 : _a2.accumulator) {
      this.spark.releaseAccumulator(this.pending.accumulator);
      this.pending = null;
    }
  }
  // Use this function to change whether this viewpoint will auto-update
  // its sort order whenever the attached SparkRenderer updates the Gsplats.
  // Turn this on or off depending on whether you expect to do renders from
  // this viewpoint most frames.
  setAutoUpdate(autoUpdate) {
    if (!this.autoUpdate && autoUpdate) {
      this.spark.autoViewpoints.push(this);
    } else if (this.autoUpdate && !autoUpdate) {
      this.spark.autoViewpoints = this.spark.autoViewpoints.filter(
        (v) => v !== this
      );
    }
    this.autoUpdate = autoUpdate;
  }
  // See below async prepareRenderPixels() for explanation of parameters.
  // Awaiting this method updates the Gsplats in the scene and performs a sort of the
  // Gsplats from this viewpoint, preparing it for a subsequent this.renderTarget()
  // call in the same tick.
  async prepare({
    scene,
    camera,
    viewToWorld,
    update,
    forceOrigin
  }) {
    var _a2;
    if (viewToWorld) {
      this.viewToWorld = viewToWorld;
    } else {
      this.camera = camera ?? this.camera;
      if (this.camera) {
        this.camera.updateMatrixWorld();
        this.viewToWorld = this.camera.matrixWorld.clone();
      }
    }
    while (update ?? true) {
      const originToWorld = forceOrigin ? this.viewToWorld : void 0;
      const updated = this.spark.updateInternal({ scene, originToWorld });
      if (updated) {
        break;
      }
      await new Promise((resolve) => setTimeout(resolve, 10));
    }
    const accumulator = this.spark.active;
    if (accumulator !== ((_a2 = this.display) == null ? void 0 : _a2.accumulator)) {
      this.spark.active.refCount += 1;
    }
    await this.sortUpdate({ accumulator, viewToWorld: this.viewToWorld });
  }
  // Render out the viewpoint to the view target RGBA buffer.
  // Swaps buffers if doubleBuffer: true was set.
  // Calls onTextureUpdated(texture) with the resulting texture.
  renderTarget({
    scene,
    camera
  }) {
    var _a2;
    const target = this.back ?? this.target;
    if (!target) {
      throw new Error("Must initialize SparkViewpoint with target");
    }
    camera = camera ?? this.camera;
    if (!camera) {
      throw new Error("Must provide camera");
    }
    if (camera instanceof PerspectiveCamera) {
      const newCam = new PerspectiveCamera().copy(camera, false);
      newCam.aspect = target.width / target.height;
      newCam.updateProjectionMatrix();
      camera = newCam;
    }
    this.viewToWorld = camera.matrixWorld.clone();
    try {
      this.spark.renderer.setRenderTarget(target);
      this.spark.prepareViewpoint(this);
      this.spark.renderer.render(scene, camera);
    } finally {
      this.spark.prepareViewpoint(this.spark.defaultView);
      this.spark.renderer.setRenderTarget(null);
    }
    if (target !== this.target) {
      [this.target, this.back] = [this.back, this.target];
    }
    (_a2 = this.onTextureUpdated) == null ? void 0 : _a2.call(this, target.texture);
  }
  // Read back the previously rendered target image as a Uint8Array of packed
  // RGBA values (in that order). If superXY was set greater than 1 then
  // downsampling is performed in the target pixel array with simple averaging
  // to derive the returned pixel values. Subsequent calls to this.readTarget()
  // will reuse the same buffers to minimize memory allocations.
  async readTarget() {
    if (!this.target) {
      throw new Error("Must initialize SparkViewpoint with target");
    }
    const { width, height } = this.target;
    const byteSize = width * height * 4;
    if (!this.superPixels || this.superPixels.length < byteSize) {
      this.superPixels = new Uint8Array(byteSize);
    }
    await this.spark.renderer.readRenderTargetPixelsAsync(
      this.target,
      0,
      0,
      width,
      height,
      this.superPixels
    );
    const { superXY } = this;
    if (superXY === 1) {
      return this.superPixels;
    }
    const subWidth = width / superXY;
    const subHeight = height / superXY;
    const subSize = subWidth * subHeight * 4;
    if (!this.pixels || this.pixels.length < subSize) {
      this.pixels = new Uint8Array(subSize);
    }
    const { superPixels, pixels } = this;
    const super2 = superXY * superXY;
    for (let y = 0; y < subHeight; y++) {
      const row = y * subWidth;
      for (let x = 0; x < subWidth; x++) {
        const superCol = x * superXY;
        let r = 0;
        let g = 0;
        let b = 0;
        let a = 0;
        for (let sy = 0; sy < superXY; sy++) {
          const superRow = (y * superXY + sy) * this.target.width;
          for (let sx = 0; sx < superXY; sx++) {
            const superIndex = (superRow + superCol + sx) * 4;
            r += superPixels[superIndex];
            g += superPixels[superIndex + 1];
            b += superPixels[superIndex + 2];
            a += superPixels[superIndex + 3];
          }
        }
        const pixelIndex = (row + x) * 4;
        pixels[pixelIndex] = r / super2;
        pixels[pixelIndex + 1] = g / super2;
        pixels[pixelIndex + 2] = b / super2;
        pixels[pixelIndex + 3] = a / super2;
      }
    }
    return pixels;
  }
  // Render out a viewpoint as a Uint8Array of RGBA values for the provided scene
  // and any camera/viewToWorld viewpoint overrides. By default update is true,
  // which triggers its SparkRenderer to check and potentially update the Gsplats.
  // Setting update to false disables this and sorts the Gsplats as they are.
  // Setting forceOrigin (default: false) to true forces the view update to
  // recalculate the splats with this view origin, potentially altering any
  // view-dependent effects. If you expect view-dependent effects to play a role
  // in the rendering quality, enable this.
  //
  // Underneath, prepareRenderPixels() simply calls await this.prepare(...),
  // this.renderTarget(...), and finally returns the result this.readTarget(),
  // a Promise to a Uint8Array with RGBA values for all the pixels (potentially
  // downsampled if the superXY parameter was used). These steps can also be called
  // manually, for example if you need to alter the scene before and after
  // this.renderTarget(...) to hide UI elements from being rendered.
  async prepareRenderPixels({
    scene,
    camera,
    viewToWorld,
    update,
    forceOrigin
  }) {
    await this.prepare({ scene, camera, viewToWorld, update, forceOrigin });
    this.renderTarget({ scene, camera });
    return this.readTarget();
  }
  // This is called automatically by SparkRenderer, there is no need to call it!
  // The method cannot be private because then SparkRenderer would
  // not be able to call it.
  autoPoll({ accumulator }) {
    var _a2, _b2, _c;
    if (this.camera) {
      this.camera.updateMatrixWorld();
      this.viewToWorld = this.camera.matrixWorld.clone();
    }
    let needsSort = false;
    let displayed = false;
    if (!this.display) {
      needsSort = true;
    } else if (accumulator) {
      needsSort = true;
      const { mappingVersion } = this.display.accumulator;
      if (accumulator.mappingVersion === mappingVersion) {
        accumulator.refCount += 1;
        this.spark.releaseAccumulator(this.display.accumulator);
        this.display.accumulator = accumulator;
        this.display.viewToWorld.copy(this.viewToWorld);
        displayed = true;
        if (this.spark.viewpoint === this) {
          this.spark.prepareViewpoint(this);
        }
      }
    }
    const latestView = ((_a2 = this.sorting) == null ? void 0 : _a2.viewToWorld) ?? ((_b2 = this.display) == null ? void 0 : _b2.viewToWorld);
    if (latestView && !withinCoorientDist({
      matrix1: this.viewToWorld,
      matrix2: latestView,
      // By default update sort each 1 cm
      maxDistance: this.sortDistance ?? 0.01,
      // By default for radial sort, update for intermittent movement so that
      // we bring back splats culled by being behind the camera.
      // For depth sort, small rotations can change sort order a lot, so
      // update sort for even small rotations.
      minCoorient: this.sortCoorient ?? this.sortRadial ? 0.99 : 0.999
    })) {
      needsSort = true;
    }
    if (!needsSort) {
      return;
    }
    if (accumulator) {
      accumulator.refCount += 1;
    }
    if ((_c = this.pending) == null ? void 0 : _c.accumulator) {
      this.spark.releaseAccumulator(this.pending.accumulator);
    }
    this.pending = { accumulator, viewToWorld: this.viewToWorld, displayed };
    this.driveSort();
  }
  async driveSort() {
    var _a2;
    while (true) {
      if (this.sorting || !this.pending) {
        return;
      }
      const { viewToWorld, displayed } = this.pending;
      let accumulator = this.pending.accumulator;
      if (!accumulator) {
        accumulator = ((_a2 = this.display) == null ? void 0 : _a2.accumulator) ?? this.spark.active;
        accumulator.refCount += 1;
      }
      this.pending = null;
      if (!accumulator) {
        throw new Error("No accumulator to sort");
      }
      this.sorting = { viewToWorld };
      await this.sortUpdate({ accumulator, viewToWorld, displayed });
      this.sorting = null;
      this.spark.releaseAccumulator(accumulator);
    }
  }
  async sortUpdate({
    accumulator,
    viewToWorld,
    displayed = false
  }) {
    if (this.sortingCheck) {
      throw new Error("Only one sort at a time");
    }
    this.sortingCheck = true;
    accumulator = accumulator ?? this.spark.active;
    const { numSplats, maxSplats } = accumulator.splats;
    let activeSplats = 0;
    let ordering = this.orderingFreelist.alloc(maxSplats);
    if (this.stochastic) {
      activeSplats = numSplats;
      for (let i = 0; i < numSplats; ++i) {
        ordering[i] = i;
      }
    } else if (numSplats > 0) {
      const {
        reader,
        doubleSortReader,
        sort32Reader,
        dynoSortRadial,
        dynoOrigin,
        dynoDirection,
        dynoDepthBias,
        dynoSort360,
        dynoSplats
      } = _SparkViewpoint2.makeSorter();
      const sort32 = this.sort32 ?? false;
      let readback;
      if (sort32) {
        this.readback32 = reader.ensureBuffer(maxSplats, this.readback32);
        readback = this.readback32;
      } else {
        const halfMaxSplats = Math.ceil(maxSplats / 2);
        this.readback16 = reader.ensureBuffer(halfMaxSplats, this.readback16);
        readback = this.readback16;
      }
      const worldToOrigin = accumulator.toWorld.clone().invert();
      const viewToOrigin = viewToWorld.clone().premultiply(worldToOrigin);
      dynoSortRadial.value = this.sort360 ? true : this.sortRadial;
      dynoOrigin.value.set(0, 0, 0).applyMatrix4(viewToOrigin);
      dynoDirection.value.set(0, 0, -1).applyMatrix4(viewToOrigin).sub(dynoOrigin.value).normalize();
      dynoDepthBias.value = this.depthBias ?? 1;
      dynoSort360.value = this.sort360 ?? false;
      dynoSplats.packedSplats = accumulator.splats;
      const sortReader = sort32 ? sort32Reader : doubleSortReader;
      const count = sort32 ? numSplats : Math.ceil(numSplats / 2);
      await reader.renderReadback({
        renderer: this.spark.renderer,
        reader: sortReader,
        count,
        readback
      });
      const result = await withWorker(async (worker) => {
        const rpcName = sort32 ? "sort32Splats" : "sortDoubleSplats";
        return worker.call(rpcName, {
          maxSplats,
          numSplats,
          readback,
          ordering
        });
      });
      if (sort32) {
        this.readback32 = result.readback;
      } else {
        this.readback16 = result.readback;
      }
      ordering = result.ordering;
      activeSplats = result.activeSplats;
    }
    this.updateDisplay({
      accumulator,
      viewToWorld,
      ordering,
      activeSplats,
      displayed
    });
    this.sortingCheck = false;
  }
  updateDisplay({
    accumulator,
    viewToWorld,
    ordering,
    activeSplats,
    displayed = false
  }) {
    if (!this.display) {
      accumulator.refCount += 1;
      this.display = {
        accumulator,
        viewToWorld,
        geometry: new SplatGeometry(ordering, activeSplats)
      };
    } else {
      if (!displayed && accumulator !== this.display.accumulator) {
        accumulator.refCount += 1;
        this.spark.releaseAccumulator(this.display.accumulator);
        this.display.accumulator = accumulator;
      }
      this.display.viewToWorld = viewToWorld;
      const oldOrdering = this.display.geometry.ordering;
      if (oldOrdering.length === ordering.length) {
        this.display.geometry.update(ordering, activeSplats);
      } else {
        this.display.geometry.dispose();
        this.display.geometry = new SplatGeometry(ordering, activeSplats);
      }
      this.orderingFreelist.free(oldOrdering);
    }
    if (this.spark.viewpoint === this) {
      this.spark.prepareViewpoint(this);
    }
  }
  static makeSorter() {
    if (!_SparkViewpoint2.dynos) {
      const dynoSortRadial = new DynoBool({ value: true });
      const dynoOrigin = new DynoVec3({ value: new Vector3() });
      const dynoDirection = new DynoVec3({ value: new Vector3() });
      const dynoDepthBias = new DynoFloat({ value: 1 });
      const dynoSort360 = new DynoBool({ value: false });
      const dynoSplats = new DynoPackedSplats();
      const reader = new Readback();
      const doubleSortReader = dynoBlock(
        { index: "int" },
        { rgba8: "vec4" },
        ({ index }) => {
          if (!index) {
            throw new Error("No index");
          }
          const sortParams = {
            sortRadial: dynoSortRadial,
            sortOrigin: dynoOrigin,
            sortDirection: dynoDirection,
            sortDepthBias: dynoDepthBias,
            sort360: dynoSort360
          };
          const index2 = mul(index, dynoConst("int", 2));
          const gsplat0 = readPackedSplat(dynoSplats, index2);
          const metric0 = computeSortMetric({ gsplat: gsplat0, ...sortParams });
          const gsplat1 = readPackedSplat(
            dynoSplats,
            add(index2, dynoConst("int", 1))
          );
          const metric1 = computeSortMetric({ gsplat: gsplat1, ...sortParams });
          const combined = combine({
            vectorType: "vec2",
            x: metric0,
            y: metric1
          });
          const rgba8 = uintToRgba8(packHalf2x16(combined));
          return { rgba8 };
        }
      );
      const sort32Reader = dynoBlock(
        { index: "int" },
        { rgba8: "vec4" },
        ({ index }) => {
          if (!index) {
            throw new Error("No index");
          }
          const sortParams = {
            sortRadial: dynoSortRadial,
            sortOrigin: dynoOrigin,
            sortDirection: dynoDirection,
            sortDepthBias: dynoDepthBias,
            sort360: dynoSort360
          };
          const gsplat = readPackedSplat(dynoSplats, index);
          const metric = computeSortMetric({ gsplat, ...sortParams });
          const rgba8 = uintToRgba8(floatBitsToUint(metric));
          return { rgba8 };
        }
      );
      _SparkViewpoint2.dynos = {
        dynoSortRadial,
        dynoOrigin,
        dynoDirection,
        dynoDepthBias,
        dynoSort360,
        dynoSplats,
        reader,
        doubleSortReader,
        sort32Reader
      };
    }
    return _SparkViewpoint2.dynos;
  }
};
_SparkViewpoint.EMPTY_TEXTURE = new Texture();
_SparkViewpoint.dynos = null;
let SparkViewpoint = _SparkViewpoint;
const defineComputeSortMetric = unindent(`
  float computeSort(Gsplat gsplat, bool sortRadial, vec3 sortOrigin, vec3 sortDirection, float sortDepthBias, bool sort360) {
    if (!isGsplatActive(gsplat.flags)) {
      return INFINITY;
    }

    vec3 center = gsplat.center - sortOrigin;
    float biasedDepth = dot(center, sortDirection) + sortDepthBias;
    if (!sort360 && (biasedDepth <= 0.0)) {
      return INFINITY;
    }

    return sortRadial ? length(center) : biasedDepth;
  }
`);
function computeSortMetric({
  gsplat,
  sortRadial,
  sortOrigin,
  sortDirection,
  sortDepthBias,
  sort360
}) {
  return dyno$1({
    inTypes: {
      gsplat: Gsplat,
      sortRadial: "bool",
      sortOrigin: "vec3",
      sortDirection: "vec3",
      sortDepthBias: "float",
      sort360: "bool"
    },
    outTypes: { metric: "float" },
    globals: /* @__PURE__ */ __name(() => [defineGsplat, defineComputeSortMetric], "globals"),
    inputs: {
      gsplat,
      sortRadial,
      sortOrigin,
      sortDirection,
      sortDepthBias,
      sort360
    },
    statements: /* @__PURE__ */ __name(({ inputs, outputs }) => {
      const {
        gsplat: gsplat2,
        sortRadial: sortRadial2,
        sortOrigin: sortOrigin2,
        sortDirection: sortDirection2,
        sortDepthBias: sortDepthBias2,
        sort360: sort3602
      } = inputs;
      return unindentLines(`
        ${outputs.metric} = computeSort(${gsplat2}, ${sortRadial2}, ${sortOrigin2}, ${sortDirection2}, ${sortDepthBias2}, ${sort3602});
      `);
    }, "statements")
  }).outputs.metric;
}
__name(computeSortMetric, "computeSortMetric");
class SplatAccumulator {
  static {
    __name(this, "SplatAccumulator");
  }
  constructor() {
    this.splats = new PackedSplats();
    this.toWorld = new Matrix4();
    this.mapping = [];
    this.refCount = 0;
    this.splatsVersion = -1;
    this.mappingVersion = -1;
  }
  ensureGenerate(maxSplats) {
    if (this.splats.ensureGenerate(maxSplats)) {
      this.mapping = [];
    }
  }
  // Generate all Gsplats from an array of generators
  generateSplats({
    renderer,
    modifier,
    generators: generators2,
    forceUpdate,
    originToWorld
  }) {
    const mapping = this.mapping.reduce((map, record) => {
      map.set(record.node, record);
      return map;
    }, /* @__PURE__ */ new Map());
    let updated = 0;
    let numSplats = 0;
    for (const { node, generator, version, base, count } of generators2) {
      const current = mapping.get(node);
      if (forceUpdate || generator !== (current == null ? void 0 : current.generator) || version !== (current == null ? void 0 : current.version) || base !== (current == null ? void 0 : current.base) || count !== (current == null ? void 0 : current.count)) {
        if (generator && count > 0) {
          const modGenerator = modifier.apply(generator);
          try {
            this.splats.generate({
              generator: modGenerator,
              base,
              count,
              renderer
            });
          } catch (error) {
            node.generator = void 0;
            node.generatorError = error;
          }
          updated += 1;
        }
      }
      numSplats = Math.max(numSplats, base + count);
    }
    this.splats.numSplats = numSplats;
    this.toWorld.copy(originToWorld);
    this.mapping = generators2;
    return updated !== 0;
  }
  // Check if this accumulator has exactly the same generator mapping as
  // the previous one. If so, we can reuse the Gsplat sort order.
  hasCorrespondence(other) {
    if (this.mapping.length !== other.mapping.length) {
      return false;
    }
    return this.mapping.every(({ node, base, count }, i) => {
      const {
        node: otherNode,
        base: otherBase,
        count: otherCount
      } = other.mapping[i];
      return node === otherNode && base === otherBase && count === otherCount;
    });
  }
}
var splatDefines_default = "const float LN_SCALE_MIN = -12.0;\nconst float LN_SCALE_MAX = 9.0;\n\nconst uint SPLAT_TEX_WIDTH_BITS = 11u;\nconst uint SPLAT_TEX_HEIGHT_BITS = 11u;\nconst uint SPLAT_TEX_DEPTH_BITS = 11u;\nconst uint SPLAT_TEX_LAYER_BITS = SPLAT_TEX_WIDTH_BITS + SPLAT_TEX_HEIGHT_BITS;\n\nconst uint SPLAT_TEX_WIDTH = 1u << SPLAT_TEX_WIDTH_BITS;\nconst uint SPLAT_TEX_HEIGHT = 1u << SPLAT_TEX_HEIGHT_BITS;\nconst uint SPLAT_TEX_DEPTH = 1u << SPLAT_TEX_DEPTH_BITS;\n\nconst uint SPLAT_TEX_WIDTH_MASK = SPLAT_TEX_WIDTH - 1u;\nconst uint SPLAT_TEX_HEIGHT_MASK = SPLAT_TEX_HEIGHT - 1u;\nconst uint SPLAT_TEX_DEPTH_MASK = SPLAT_TEX_DEPTH - 1u;\n\nconst uint F16_INF = 0x7c00u;\nconst float PI = 3.1415926535897932384626433832795;\n\nconst float INFINITY = 1.0 / 0.0;\nconst float NEG_INFINITY = -INFINITY;\n\nfloat sqr(float x) {\n    return x * x;\n}\n\nfloat pow4(float x) {\n    float x2 = x * x;\n    return x2 * x2;\n}\n\nfloat pow8(float x) {\n    float x4 = pow4(x);\n    return x4 * x4;\n}\n\nvec3 srgbToLinear(vec3 rgb) {\n    return pow(rgb, vec3(2.2));\n}\n\nvec3 linearToSrgb(vec3 rgb) {\n    return pow(rgb, vec3(1.0 / 2.2));\n}\n\nuint encodeQuatOctXy88R8(vec4 q) {\n    \n    if (q.w < 0.0) {\n        q = -q;\n    }\n    \n    float theta = 2.0 * acos(q.w);\n    float halfTheta = theta * 0.5;\n    float s = sin(halfTheta);\n    \n    vec3 axis = (abs(s) < 1e-6) ? vec3(1.0, 0.0, 0.0) : q.xyz / s;\n    \n    \n    \n    float sum = abs(axis.x) + abs(axis.y) + abs(axis.z);\n    vec2 p = vec2(axis.x, axis.y) / sum;\n    \n    if (axis.z < 0.0) {\n        float oldPx = p.x;\n        p.x = (1.0 - abs(p.y)) * (p.x >= 0.0 ? 1.0 : -1.0);\n        p.y = (1.0 - abs(oldPx)) * (p.y >= 0.0 ? 1.0 : -1.0);\n    }\n    \n    float u_f = p.x * 0.5 + 0.5;\n    float v_f = p.y * 0.5 + 0.5;\n    \n    uint quantU = uint(clamp(round(u_f * 255.0), 0.0, 255.0));\n    uint quantV = uint(clamp(round(v_f * 255.0), 0.0, 255.0));\n    \n    \n    \n    uint angleInt = uint(clamp(round((theta / 3.14159265359) * 255.0), 0.0, 255.0));\n    \n    \n    return (angleInt << 16u) | (quantV << 8u) | quantU;\n}\n\nvec4 decodeQuatOctXy88R8(uint encoded) {\n    \n    uint quantU = encoded & uint(0xFFu);               \n    uint quantV = (encoded >> 8u) & uint(0xFFu);         \n    uint angleInt = encoded >> 16u;                      \n\n    \n    float u_f = float(quantU) / 255.0;\n    float v_f = float(quantV) / 255.0;\n    vec2 f = vec2(u_f * 2.0 - 1.0, v_f * 2.0 - 1.0);\n\n    vec3 axis = vec3(f.xy, 1.0 - abs(f.x) - abs(f.y));\n    float t = max(-axis.z, 0.0);\n    axis.x += (axis.x >= 0.0) ? -t : t;\n    axis.y += (axis.y >= 0.0) ? -t : t;\n    axis = normalize(axis);\n    \n    \n    float theta = (float(angleInt) / 255.0) * 3.14159265359;\n    float halfTheta = theta * 0.5;\n    float s = sin(halfTheta);\n    float w = cos(halfTheta);\n    \n    return vec4(axis * s, w);\n}\n\n    \n\n    \n\n    \n\n    \n\n    \n\n    \n\n    \n\n    \n\n    \n\n    \n\nuvec4 packSplatEncoding(\n    vec3 center, vec3 scales, vec4 quaternion, vec4 rgba, vec4 rgbMinMaxLnScaleMinMax\n) {\n    float rgbMin = rgbMinMaxLnScaleMinMax.x;\n    float rgbMax = rgbMinMaxLnScaleMinMax.y;\n    vec3 encRgb = (rgba.rgb - vec3(rgbMin)) / (rgbMax - rgbMin);\n    uvec4 uRgba = uvec4(round(clamp(vec4(encRgb, rgba.a) * 255.0, 0.0, 255.0)));\n\n    uint uQuat = encodeQuatOctXy88R8(quaternion);\n    \n    \n    uvec3 uQuat3 = uvec3(uQuat & 0xffu, (uQuat >> 8u) & 0xffu, (uQuat >> 16u) & 0xffu);\n\n    \n    float lnScaleMin = rgbMinMaxLnScaleMinMax.z;\n    float lnScaleMax = rgbMinMaxLnScaleMinMax.w;\n    float lnScaleScale = 254.0 / (lnScaleMax - lnScaleMin);\n    uvec3 uScales = uvec3(\n        (scales.x == 0.0) ? 0u : uint(round(clamp((log(scales.x) - lnScaleMin) * lnScaleScale, 0.0, 254.0))) + 1u,\n        (scales.y == 0.0) ? 0u : uint(round(clamp((log(scales.y) - lnScaleMin) * lnScaleScale, 0.0, 254.0))) + 1u,\n        (scales.z == 0.0) ? 0u : uint(round(clamp((log(scales.z) - lnScaleMin) * lnScaleScale, 0.0, 254.0))) + 1u\n    );\n\n    \n    uint word0 = uRgba.r | (uRgba.g << 8u) | (uRgba.b << 16u) | (uRgba.a << 24u);\n    uint word1 = packHalf2x16(center.xy);\n    uint word2 = packHalf2x16(vec2(center.z, 0.0)) | (uQuat3.x << 16u) | (uQuat3.y << 24u);\n    uint word3 = uScales.x | (uScales.y << 8u) | (uScales.z << 16u) | (uQuat3.z << 24u);\n    return uvec4(word0, word1, word2, word3);\n}\n\nuvec4 packSplat(vec3 center, vec3 scales, vec4 quaternion, vec4 rgba) {\n    return packSplatEncoding(center, scales, quaternion, rgba, vec4(0.0, 1.0, LN_SCALE_MIN, LN_SCALE_MAX));\n}\n\nvoid unpackSplatEncoding(uvec4 packed, out vec3 center, out vec3 scales, out vec4 quaternion, out vec4 rgba, vec4 rgbMinMaxLnScaleMinMax) {\n    uint word0 = packed.x, word1 = packed.y, word2 = packed.z, word3 = packed.w;\n\n    uvec4 uRgba = uvec4(word0 & 0xffu, (word0 >> 8u) & 0xffu, (word0 >> 16u) & 0xffu, (word0 >> 24u) & 0xffu);\n    float rgbMin = rgbMinMaxLnScaleMinMax.x;\n    float rgbMax = rgbMinMaxLnScaleMinMax.y;\n    rgba = (vec4(uRgba) / 255.0);\n    rgba.rgb = rgba.rgb * (rgbMax - rgbMin) + rgbMin;\n\n    center = vec4(\n        unpackHalf2x16(word1),\n        unpackHalf2x16(word2 & 0xffffu)\n    ).xyz;\n\n    uvec3 uScales = uvec3(word3 & 0xffu, (word3 >> 8u) & 0xffu, (word3 >> 16u) & 0xffu);\n    float lnScaleMin = rgbMinMaxLnScaleMinMax.z;\n    float lnScaleMax = rgbMinMaxLnScaleMinMax.w;\n    float lnScaleScale = (lnScaleMax - lnScaleMin) / 254.0;\n    scales = vec3(\n        (uScales.x == 0u) ? 0.0 : exp(lnScaleMin + float(uScales.x - 1u) * lnScaleScale),\n        (uScales.y == 0u) ? 0.0 : exp(lnScaleMin + float(uScales.y - 1u) * lnScaleScale),\n        (uScales.z == 0u) ? 0.0 : exp(lnScaleMin + float(uScales.z - 1u) * lnScaleScale)\n    );\n\n    uint uQuat = ((word2 >> 16u) & 0xFFFFu) | ((word3 >> 8u) & 0xFF0000u);\n    quaternion = decodeQuatOctXy88R8(uQuat);\n    \n    \n}\n\nvoid unpackSplat(uvec4 packed, out vec3 center, out vec3 scales, out vec4 quaternion, out vec4 rgba) {\n    unpackSplatEncoding(packed, center, scales, quaternion, rgba, vec4(0.0, 1.0, LN_SCALE_MIN, LN_SCALE_MAX));\n}\n\nvec3 quatVec(vec4 q, vec3 v) {\n    \n    vec3 t = 2.0 * cross(q.xyz, v);\n    return v + q.w * t + cross(q.xyz, t);\n}\n\nvec4 quatQuat(vec4 q1, vec4 q2) {\n    return vec4(\n        q1.w * q2.x + q1.x * q2.w + q1.y * q2.z - q1.z * q2.y,\n        q1.w * q2.y - q1.x * q2.z + q1.y * q2.w + q1.z * q2.x,\n        q1.w * q2.z + q1.x * q2.y - q1.y * q2.x + q1.z * q2.w,\n        q1.w * q2.w - q1.x * q2.x - q1.y * q2.y - q1.z * q2.z\n    );\n}\n\nmat3 scaleQuaternionToMatrix(vec3 s, vec4 q) {\n    \n    return mat3(\n        s.x * (1.0 - 2.0 * (q.y * q.y + q.z * q.z)),\n        s.x * (2.0 * (q.x * q.y + q.w * q.z)),\n        s.x * (2.0 * (q.x * q.z - q.w * q.y)),\n        s.y * (2.0 * (q.x * q.y - q.w * q.z)),\n        s.y * (1.0 - 2.0 * (q.x * q.x + q.z * q.z)),\n        s.y * (2.0 * (q.y * q.z + q.w * q.x)),\n        s.z * (2.0 * (q.x * q.z + q.w * q.y)),\n        s.z * (2.0 * (q.y * q.z - q.w * q.x)),\n        s.z * (1.0 - 2.0 * (q.x * q.x + q.y * q.y))\n    );\n}\n\nvec4 slerp(vec4 q1, vec4 q2, float t) {\n    \n    float cosHalfTheta = dot(q1, q2);\n\n    \n    if (abs(cosHalfTheta) >= 0.999) {\n        return q1;\n    }\n    \n    \n    \n    if (cosHalfTheta < 0.0) {\n        q2 = -q2;\n        cosHalfTheta = -cosHalfTheta;\n    }\n\n    \n    float halfTheta = acos(cosHalfTheta);\n    float sinHalfTheta = sqrt(1.0 - cosHalfTheta * cosHalfTheta);\n\n    \n    float ratioA = sin((1.0 - t) * halfTheta) / sinHalfTheta;\n    float ratioB = sin(t * halfTheta) / sinHalfTheta;\n\n    \n    return q1 * ratioA + q2 * ratioB;\n}\n\nivec3 splatTexCoord(int index) {\n    uint x = uint(index) & SPLAT_TEX_WIDTH_MASK;\n    uint y = (uint(index) >> SPLAT_TEX_WIDTH_BITS) & SPLAT_TEX_HEIGHT_MASK;\n    uint z = uint(index) >> SPLAT_TEX_LAYER_BITS;\n    return ivec3(x, y, z);\n}";
var splatFragment_default = "precision highp float;\nprecision highp int;\n\n#include <splatDefines>\n#include <logdepthbuf_pars_fragment>\n\nuniform float near;\nuniform float far;\nuniform bool encodeLinear;\nuniform float time;\nuniform bool debugFlag;\nuniform float maxStdDev;\nuniform float minAlpha;\nuniform bool stochastic;\nuniform bool disableFalloff;\nuniform float falloff;\n\nuniform bool splatTexEnable;\nuniform sampler3D splatTexture;\nuniform mat2 splatTexMul;\nuniform vec2 splatTexAdd;\nuniform float splatTexNear;\nuniform float splatTexFar;\nuniform float splatTexMid;\n\nout vec4 fragColor;\n\nin vec4 vRgba;\nin vec2 vSplatUv;\nin vec3 vNdc;\nflat in uint vSplatIndex;\n\nvoid main() {\n    vec4 rgba = vRgba;\n\n    float z = dot(vSplatUv, vSplatUv);\n    if (!splatTexEnable) {\n        if (z > (maxStdDev * maxStdDev)) {\n            discard;\n        }\n    } else {\n        vec2 uv = splatTexMul * vSplatUv + splatTexAdd;\n        float ndcZ = vNdc.z;\n        float depth = (2.0 * near * far) / (far + near - ndcZ * (far - near));\n        float clampedFar = max(splatTexFar, splatTexNear);\n        float clampedDepth = clamp(depth, splatTexNear, clampedFar);\n        float logDepth = log2(clampedDepth + 1.0);\n        float logNear = log2(splatTexNear + 1.0);\n        float logFar = log2(clampedFar + 1.0);\n\n        float texZ;\n        if (splatTexMid > 0.0) {\n            float clampedMid = clamp(splatTexMid, splatTexNear, clampedFar);\n            float logMid = log2(clampedMid + 1.0);\n            texZ = (clampedDepth <= clampedMid) ?\n                (0.5 * ((logDepth - logNear) / (logMid - logNear))) :\n                (0.5 * ((logDepth - logMid) / (logFar - logMid)) + 0.5);\n        } else {\n            texZ = (logDepth - logNear) / (logFar - logNear);\n        }\n\n        vec4 modulate = texture(splatTexture, vec3(uv, 1.0 - texZ));\n        rgba *= modulate;\n    }\n\n    rgba.a *= mix(1.0, exp(-0.5 * z), falloff);\n\n    if (rgba.a < minAlpha) {\n        discard;\n    }\n    if (encodeLinear) {\n        rgba.rgb = srgbToLinear(rgba.rgb);\n    }\n\n    if (stochastic) {\n        const bool STEADY = false;\n        uint uTime = STEADY ? 0u : floatBitsToUint(time);\n        uvec2 coord = uvec2(gl_FragCoord.xy);\n        uint state = uTime + 0x9e3779b9u * coord.x + 0x85ebca6bu * coord.y + 0xc2b2ae35u * uint(vSplatIndex);\n        state = state * 747796405u + 2891336453u;\n        uint hash = ((state >> ((state >> 28u) + 4u)) ^ state) * 277803737u;\n        hash = (hash >> 22u) ^ hash;\n        float rand = float(hash) / 4294967296.0;\n        if (rand < rgba.a) {\n            fragColor = vec4(rgba.rgb, 1.0);\n        } else {\n            discard;\n        }\n    } else {\n        #ifdef PREMULTIPLIED_ALPHA\n            fragColor = vec4(rgba.rgb * rgba.a, rgba.a);\n        #else\n            fragColor = rgba;\n        #endif\n    }\n    #include <logdepthbuf_fragment>\n}";
var splatVertex_default = "precision highp float;\nprecision highp int;\nprecision highp usampler2DArray;\n\n#include <splatDefines>\n#include <logdepthbuf_pars_vertex>\n\nattribute uint splatIndex;\n\nout vec4 vRgba;\nout vec2 vSplatUv;\nout vec3 vNdc;\nflat out uint vSplatIndex;\n\nuniform vec2 renderSize;\nuniform uint numSplats;\nuniform vec4 renderToViewQuat;\nuniform vec3 renderToViewPos;\nuniform float maxStdDev;\nuniform float minPixelRadius;\nuniform float maxPixelRadius;\nuniform float time;\nuniform float deltaTime;\nuniform bool debugFlag;\nuniform float minAlpha;\nuniform bool stochastic;\nuniform bool enable2DGS;\nuniform float blurAmount;\nuniform float preBlurAmount;\nuniform float focalDistance;\nuniform float apertureAngle;\nuniform float clipXY;\nuniform float focalAdjustment;\n\nuniform usampler2DArray packedSplats;\nuniform vec4 rgbMinMaxLnScaleMinMax;\n\n#ifdef USE_LOGDEPTHBUF\n    bool isPerspectiveMatrix( mat4 m ) {\n      return m[ 2 ][ 3 ] == - 1.0;\n    }\n#endif\n\nvoid main() {\n    \n    gl_Position = vec4(0.0, 0.0, 2.0, 1.0);\n\n    if (uint(gl_InstanceID) >= numSplats) {\n        return;\n    }\n\n    ivec3 texCoord;\n    if (stochastic) {\n        texCoord = ivec3(\n            uint(gl_InstanceID) & SPLAT_TEX_WIDTH_MASK,\n            (uint(gl_InstanceID) >> SPLAT_TEX_WIDTH_BITS) & SPLAT_TEX_HEIGHT_MASK,\n            (uint(gl_InstanceID) >> SPLAT_TEX_LAYER_BITS)\n        );\n    } else {\n        if (splatIndex == 0xffffffffu) {\n            \n            return;\n        }\n        texCoord = ivec3(\n            splatIndex & SPLAT_TEX_WIDTH_MASK,\n            (splatIndex >> SPLAT_TEX_WIDTH_BITS) & SPLAT_TEX_HEIGHT_MASK,\n            splatIndex >> SPLAT_TEX_LAYER_BITS\n        );\n    }\n    uvec4 packed = texelFetch(packedSplats, texCoord, 0);\n\n    vec3 center, scales;\n    vec4 quaternion, rgba;\n    unpackSplatEncoding(packed, center, scales, quaternion, rgba, rgbMinMaxLnScaleMinMax);\n\n    if (rgba.a < minAlpha) {\n        return;\n    }\n    bvec3 zeroScales = equal(scales, vec3(0.0));\n    if (all(zeroScales)) {\n        return;\n    }\n\n    \n    vec3 viewCenter = quatVec(renderToViewQuat, center) + renderToViewPos;\n\n    \n    if (viewCenter.z >= 0.0) {\n        return;\n    }\n\n    \n    vec4 clipCenter = projectionMatrix * vec4(viewCenter, 1.0);\n\n    \n    if (abs(clipCenter.z) >= clipCenter.w) {\n        return;\n    }\n\n    \n    float clip = clipXY * clipCenter.w;\n    if (abs(clipCenter.x) > clip || abs(clipCenter.y) > clip) {\n        return;\n    }\n\n    \n    vSplatIndex = splatIndex;\n\n    \n    vec4 viewQuaternion = quatQuat(renderToViewQuat, quaternion);\n\n    if (enable2DGS && any(zeroScales)) {\n        vRgba = rgba;\n        vSplatUv = position.xy * maxStdDev;\n\n        vec3 offset;\n        if (zeroScales.z) {\n            offset = vec3(vSplatUv.xy * scales.xy, 0.0);\n        } else if (zeroScales.y) {\n            offset = vec3(vSplatUv.x * scales.x, 0.0, vSplatUv.y * scales.z);\n        } else {\n            offset = vec3(0.0, vSplatUv.xy * scales.yz);\n        }\n\n        vec3 viewPos = viewCenter + quatVec(viewQuaternion, offset);\n        gl_Position = projectionMatrix * vec4(viewPos, 1.0);\n        vNdc = gl_Position.xyz / gl_Position.w;\n        return;\n    }\n\n    \n    vec3 ndcCenter = clipCenter.xyz / clipCenter.w;\n\n    \n    mat3 RS = scaleQuaternionToMatrix(scales, viewQuaternion);\n    mat3 cov3D = RS * transpose(RS);\n\n    \n    vec2 scaledRenderSize = renderSize * focalAdjustment;\n    vec2 focal = 0.5 * scaledRenderSize * vec2(projectionMatrix[0][0], projectionMatrix[1][1]);\n\n    mat3 J;\n    if(isOrthographic) {\n        J = mat3(\n            focal.x, 0.0, 0.0,\n            0.0, focal.y, 0.0,\n            0.0, 0.0, 0.0\n        );\n    } else {\n        float invZ = 1.0 / viewCenter.z;\n        vec2 J1 = focal * invZ;\n        vec2 J2 = -(J1 * viewCenter.xy) * invZ;\n        J = mat3(\n            J1.x, 0.0, J2.x,\n            0.0, J1.y, J2.y,\n            0.0, 0.0, 0.0\n        );\n    }\n\n    \n    \n    \n    \n    \n    \n    \n    mat3 cov2D = transpose(J) * cov3D * J;\n    float a = cov2D[0][0];\n    float d = cov2D[1][1];\n    float b = cov2D[0][1];\n\n    \n    a += preBlurAmount;\n    d += preBlurAmount;\n\n    float fullBlurAmount = blurAmount;\n    if ((focalDistance > 0.0) && (apertureAngle > 0.0)) {\n        float focusRadius = maxPixelRadius;\n        if (viewCenter.z < 0.0) {\n            float focusBlur = abs((-viewCenter.z - focalDistance) / viewCenter.z);\n            float apertureRadius = focal.x * tan(0.5 * apertureAngle);\n            focusRadius = focusBlur * apertureRadius;\n        }\n        fullBlurAmount = clamp(sqr(focusRadius), blurAmount, sqr(maxPixelRadius));\n    }\n\n    \n    float detOrig = a * d - b * b;\n    a += fullBlurAmount;\n    d += fullBlurAmount;\n    float det = a * d - b * b;\n\n    \n    float blurAdjust = sqrt(max(0.0, detOrig / det));\n    rgba.a *= blurAdjust;\n    if (rgba.a < minAlpha) {\n        return;\n    }\n\n    \n    float eigenAvg = 0.5 * (a + d);\n    float eigenDelta = sqrt(max(0.0, eigenAvg * eigenAvg - det));\n    float eigen1 = eigenAvg + eigenDelta;\n    float eigen2 = eigenAvg - eigenDelta;\n\n    vec2 eigenVec1 = normalize(vec2((abs(b) < 0.001) ? 1.0 : b, eigen1 - a));\n    vec2 eigenVec2 = vec2(eigenVec1.y, -eigenVec1.x);\n\n    float scale1 = min(maxPixelRadius, maxStdDev * sqrt(eigen1));\n    float scale2 = min(maxPixelRadius, maxStdDev * sqrt(eigen2));\n    if (scale1 < minPixelRadius && scale2 < minPixelRadius) {\n        return;\n    }\n\n    \n    vec2 pixelOffset = position.x * eigenVec1 * scale1 + position.y * eigenVec2 * scale2;\n    vec2 ndcOffset = (2.0 / scaledRenderSize) * pixelOffset;\n    vec3 ndc = vec3(ndcCenter.xy + ndcOffset, ndcCenter.z);\n\n    vRgba = rgba;\n    vSplatUv = position.xy * maxStdDev;\n    vNdc = ndc;\n    gl_Position = vec4(ndc.xy * clipCenter.w, clipCenter.zw);\n    #include <logdepthbuf_vertex>\n}";
let shaders = null;
function getShaders() {
  if (!shaders) {
    ShaderChunk.splatDefines = splatDefines_default;
    shaders = {
      splatVertex: splatVertex_default,
      splatFragment: splatFragment_default
    };
  }
  return shaders;
}
__name(getShaders, "getShaders");
const MAX_ACCUMULATORS = 5;
const _SparkRenderer = class _SparkRenderer2 extends Mesh {
  static {
    __name(this, "_SparkRenderer");
  }
  constructor(options) {
    const uniforms = _SparkRenderer2.makeUniforms();
    const shaders2 = getShaders();
    const premultipliedAlpha = options.premultipliedAlpha ?? true;
    const material = new ShaderMaterial({
      glslVersion: GLSL3,
      vertexShader: shaders2.splatVertex,
      fragmentShader: shaders2.splatFragment,
      uniforms,
      premultipliedAlpha,
      transparent: true,
      depthTest: true,
      depthWrite: false,
      side: DoubleSide
    });
    super(EMPTY_GEOMETRY, material);
    this.splatTexture = null;
    this.autoViewpoints = [];
    this.rotateToAccumulator = new DynoVec4({ value: new Quaternion() });
    this.translateToAccumulator = new DynoVec3({ value: new Vector3() });
    this.lastFrame = -1;
    this.lastUpdateTime = null;
    this.defaultCameras = [];
    this.lastStochastic = null;
    this.pendingUpdate = {
      scene: null,
      originToWorld: new Matrix4(),
      timeoutId: -1
    };
    this.envViewpoint = null;
    this.frustumCulled = false;
    this.renderer = options.renderer;
    this.material = material;
    this.uniforms = uniforms;
    const modifier = dynoBlock(
      { gsplat: Gsplat },
      { gsplat: Gsplat },
      ({ gsplat }) => {
        if (!gsplat) {
          throw new Error("gsplat not defined");
        }
        gsplat = transformGsplat(gsplat, {
          rotate: this.rotateToAccumulator,
          translate: this.translateToAccumulator
        });
        return { gsplat };
      }
    );
    this.modifier = new SplatModifier(modifier);
    this.premultipliedAlpha = premultipliedAlpha;
    this.autoUpdate = options.autoUpdate ?? true;
    this.preUpdate = options.preUpdate ?? false;
    this.needsUpdate = false;
    this.originDistance = options.originDistance ?? 1;
    this.maxStdDev = options.maxStdDev ?? Math.sqrt(8);
    this.minPixelRadius = options.minPixelRadius ?? 0;
    this.maxPixelRadius = options.maxPixelRadius ?? 512;
    this.minAlpha = options.minAlpha ?? 0.5 * (1 / 255);
    this.enable2DGS = options.enable2DGS ?? false;
    this.preBlurAmount = options.preBlurAmount ?? 0;
    this.blurAmount = options.blurAmount ?? 0.3;
    this.focalDistance = options.focalDistance ?? 0;
    this.apertureAngle = options.apertureAngle ?? 0;
    this.falloff = options.falloff ?? 1;
    this.clipXY = options.clipXY ?? 1.4;
    this.focalAdjustment = options.focalAdjustment ?? 1;
    this.splatEncoding = options.splatEncoding ?? { ...DEFAULT_SPLAT_ENCODING };
    this.active = new SplatAccumulator();
    this.active.refCount = 1;
    this.accumulatorCount = 1;
    this.freeAccumulators = [];
    for (let count = 0; count < 1; ++count) {
      this.freeAccumulators.push(new SplatAccumulator());
      this.accumulatorCount += 1;
    }
    this.defaultView = new SparkViewpoint({
      ...options.view,
      autoUpdate: true,
      spark: this
    });
    this.viewpoint = this.defaultView;
    this.prepareViewpoint(this.viewpoint);
    this.clock = options.clock ? cloneClock(options.clock) : new Clock();
  }
  static makeUniforms() {
    const uniforms = {
      // Size of render viewport in pixels
      renderSize: { value: new Vector2() },
      // Near and far plane distances
      near: { value: 0.1 },
      far: { value: 1e3 },
      // Total number of Gsplats in packedSplats to render
      numSplats: { value: 0 },
      // SplatAccumulator to view transformation quaternion
      renderToViewQuat: { value: new Quaternion() },
      // SplatAccumulator to view transformation translation
      renderToViewPos: { value: new Vector3() },
      // Maximum distance (in stddevs) from Gsplat center to render
      maxStdDev: { value: 1 },
      // Minimum pixel radius for splat rendering
      minPixelRadius: { value: 0 },
      // Maximum pixel radius for splat rendering
      maxPixelRadius: { value: 512 },
      // Minimum alpha value for splat rendering
      minAlpha: { value: 0.5 * (1 / 255) },
      // Enable stochastic splat rendering
      stochastic: { value: false },
      // Enable interpreting 0-thickness Gsplats as 2DGS
      enable2DGS: { value: false },
      // Add to projected 2D splat covariance diagonal (thickens and brightens)
      preBlurAmount: { value: 0 },
      // Add to 2D splat covariance diagonal and adjust opacity (anti-aliasing)
      blurAmount: { value: 0.3 },
      // Depth-of-field distance to focal plane
      focalDistance: { value: 0 },
      // Full-width angle of aperture opening (in radians)
      apertureAngle: { value: 0 },
      // Modulate Gaussian kernal falloff. 0 means "no falloff, flat shading",
      // 1 is normal e^-x^2 falloff.
      falloff: { value: 1 },
      // Clip Gsplats that are clipXY times beyond the +-1 frustum bounds
      clipXY: { value: 1.4 },
      // Debug renderSize scale factor
      focalAdjustment: { value: 1 },
      // Enable splat texture rendering
      splatTexEnable: { value: false },
      // Splat texture to render
      splatTexture: { type: "t", value: _SparkRenderer2.EMPTY_SPLAT_TEXTURE },
      // Splat texture UV transform (multiply)
      splatTexMul: { value: new Matrix2() },
      // Splat texture UV transform (add)
      splatTexAdd: { value: new Vector2() },
      // Splat texture near plane distance
      splatTexNear: { value: 0.1 },
      // Splat texture far plane distance
      splatTexFar: { value: 1e3 },
      // Splat texture mid plane distance, or 0.0 to disable
      splatTexMid: { value: 0 },
      // Gsplat collection to render
      packedSplats: { type: "t", value: PackedSplats.getEmpty() },
      // Splat encoding ranges
      rgbMinMaxLnScaleMinMax: { value: new Vector4() },
      // Time in seconds for time-based effects
      time: { value: 0 },
      // Delta time in seconds since last frame
      deltaTime: { value: 0 },
      // Whether to encode Gsplat with linear RGB (for environment mapping)
      encodeLinear: { value: false },
      // Debug flag that alternates each frame
      debugFlag: { value: false }
    };
    return uniforms;
  }
  canAllocAccumulator() {
    return this.freeAccumulators.length > 0 || this.accumulatorCount < MAX_ACCUMULATORS;
  }
  maybeAllocAccumulator() {
    let accumulator = this.freeAccumulators.pop();
    if (accumulator === void 0) {
      if (this.accumulatorCount >= MAX_ACCUMULATORS) {
        return null;
      }
      accumulator = new SplatAccumulator();
      this.accumulatorCount += 1;
    }
    accumulator.refCount = 1;
    return accumulator;
  }
  releaseAccumulator(accumulator) {
    accumulator.refCount -= 1;
    if (accumulator.refCount === 0) {
      this.freeAccumulators.push(accumulator);
    }
  }
  newViewpoint(options) {
    return new SparkViewpoint({ ...options, spark: this });
  }
  onBeforeRender(renderer, scene, camera) {
    var _a2, _b2;
    const time = this.time ?? this.clock.getElapsedTime();
    const deltaTime = time - (this.viewpoint.lastTime ?? time);
    this.viewpoint.lastTime = time;
    const frame = renderer.info.render.frame;
    const isNewFrame = frame !== this.lastFrame;
    this.lastFrame = frame;
    const viewpoint = this.viewpoint;
    if (viewpoint === this.defaultView) {
      if (isNewFrame) {
        if (!renderer.xr.isPresenting) {
          this.defaultView.viewToWorld = camera.matrixWorld.clone();
          this.defaultCameras = [this.defaultView.viewToWorld];
        } else {
          const cameras = renderer.xr.getCamera().cameras;
          this.defaultCameras = cameras.map((camera2) => camera2.matrixWorld);
          this.defaultView.viewToWorld = averageOriginToWorlds(this.defaultCameras) ?? new Matrix4();
        }
      }
      if (this.autoUpdate) {
        this.update({ scene, viewToWorld: this.defaultView.viewToWorld });
      }
    }
    if (isNewFrame) {
      if (this.material.premultipliedAlpha !== this.premultipliedAlpha) {
        this.material.premultipliedAlpha = this.premultipliedAlpha;
        this.material.needsUpdate = true;
      }
      this.uniforms.time.value = time;
      this.uniforms.deltaTime.value = deltaTime;
      this.uniforms.debugFlag.value = performance.now() / 1e3 % 2 < 1;
      if (viewpoint.display && viewpoint.stochastic) {
        this.geometry.instanceCount = this.uniforms.numSplats.value;
      }
    }
    if (viewpoint.target) {
      this.uniforms.renderSize.value.set(
        viewpoint.target.width,
        viewpoint.target.height
      );
    } else {
      const renderSize = renderer.getDrawingBufferSize(
        this.uniforms.renderSize.value
      );
      if (renderSize.x === 1 && renderSize.y === 1) {
        const baseLayer = (_a2 = renderer.xr.getSession()) == null ? void 0 : _a2.renderState.baseLayer;
        if (baseLayer) {
          renderSize.x = baseLayer.framebufferWidth;
          renderSize.y = baseLayer.framebufferHeight;
        }
      }
    }
    const typedCamera = camera;
    this.uniforms.near.value = typedCamera.near;
    this.uniforms.far.value = typedCamera.far;
    this.uniforms.encodeLinear.value = viewpoint.encodeLinear;
    this.uniforms.maxStdDev.value = this.maxStdDev;
    this.uniforms.minPixelRadius.value = this.minPixelRadius;
    this.uniforms.maxPixelRadius.value = this.maxPixelRadius;
    this.uniforms.minAlpha.value = this.minAlpha;
    this.uniforms.stochastic.value = viewpoint.stochastic;
    this.uniforms.enable2DGS.value = this.enable2DGS;
    this.uniforms.preBlurAmount.value = this.preBlurAmount;
    this.uniforms.blurAmount.value = this.blurAmount;
    this.uniforms.focalDistance.value = this.focalDistance;
    this.uniforms.apertureAngle.value = this.apertureAngle;
    this.uniforms.falloff.value = this.falloff;
    this.uniforms.clipXY.value = this.clipXY;
    this.uniforms.focalAdjustment.value = this.focalAdjustment;
    if (this.lastStochastic !== !viewpoint.stochastic) {
      this.lastStochastic = !viewpoint.stochastic;
      this.material.transparent = !viewpoint.stochastic;
      this.material.depthWrite = viewpoint.stochastic;
      this.material.needsUpdate = true;
    }
    if (this.splatTexture) {
      const { enable, texture: texture2, multiply, add: add2, near, far, mid } = this.splatTexture;
      if (enable && texture2) {
        this.uniforms.splatTexEnable.value = true;
        this.uniforms.splatTexture.value = texture2;
        if (multiply) {
          this.uniforms.splatTexMul.value.fromArray(multiply.elements);
        } else {
          this.uniforms.splatTexMul.value.set(
            0.5 / this.maxStdDev,
            0,
            0,
            0.5 / this.maxStdDev
          );
        }
        this.uniforms.splatTexAdd.value.set((add2 == null ? void 0 : add2.x) ?? 0.5, (add2 == null ? void 0 : add2.y) ?? 0.5);
        this.uniforms.splatTexNear.value = near ?? this.uniforms.near.value;
        this.uniforms.splatTexFar.value = far ?? this.uniforms.far.value;
        this.uniforms.splatTexMid.value = mid ?? 0;
      } else {
        this.uniforms.splatTexEnable.value = false;
        this.uniforms.splatTexture.value = _SparkRenderer2.EMPTY_SPLAT_TEXTURE;
      }
    } else {
      this.uniforms.splatTexEnable.value = false;
      this.uniforms.splatTexture.value = _SparkRenderer2.EMPTY_SPLAT_TEXTURE;
    }
    const accumToWorld = ((_b2 = viewpoint.display) == null ? void 0 : _b2.accumulator.toWorld) ?? new Matrix4();
    const worldToCamera = camera.matrixWorld.clone().invert();
    const originToCamera = accumToWorld.clone().premultiply(worldToCamera);
    originToCamera.decompose(
      this.uniforms.renderToViewPos.value,
      this.uniforms.renderToViewQuat.value,
      new Vector3()
    );
  }
  // Update the uniforms for the given viewpoint.
  // Note that the client expects to be able to call render() at any point
  // to update the canvas, so we must switch the viewpoint back to
  // defaultView when we're finished.
  prepareViewpoint(viewpoint) {
    var _a2, _b2, _c, _d;
    this.viewpoint = viewpoint ?? this.viewpoint;
    if (this.viewpoint.display) {
      const { accumulator, geometry } = this.viewpoint.display;
      this.uniforms.numSplats.value = accumulator.splats.numSplats;
      this.uniforms.packedSplats.value = accumulator.splats.getTexture();
      this.uniforms.rgbMinMaxLnScaleMinMax.value.set(
        ((_a2 = accumulator.splats.splatEncoding) == null ? void 0 : _a2.rgbMin) ?? 0,
        ((_b2 = accumulator.splats.splatEncoding) == null ? void 0 : _b2.rgbMax) ?? 1,
        ((_c = accumulator.splats.splatEncoding) == null ? void 0 : _c.lnScaleMin) ?? LN_SCALE_MIN,
        ((_d = accumulator.splats.splatEncoding) == null ? void 0 : _d.lnScaleMax) ?? LN_SCALE_MAX
      );
      this.geometry = geometry;
      this.material.transparent = !this.viewpoint.stochastic;
      this.material.depthWrite = this.viewpoint.stochastic;
      this.material.needsUpdate = true;
    } else {
      this.uniforms.numSplats.value = 0;
      this.uniforms.packedSplats.value = PackedSplats.getEmpty();
      this.geometry = EMPTY_GEOMETRY;
    }
  }
  // If spark.autoUpdate is false then you must manually call
  // spark.update({ scene }) to have the scene Gsplats be re-generated.
  update({
    scene,
    viewToWorld
  }) {
    const originToWorld = this.matrixWorld;
    if (this.preUpdate) {
      this.updateInternal({
        scene,
        originToWorld: originToWorld.clone(),
        viewToWorld
      });
    } else {
      this.pendingUpdate.scene = scene;
      this.pendingUpdate.originToWorld.copy(originToWorld);
      if (this.pendingUpdate.timeoutId === -1) {
        this.pendingUpdate.timeoutId = setTimeout(() => {
          const { scene: scene2, originToWorld: originToWorld2 } = this.pendingUpdate;
          this.pendingUpdate.scene = null;
          this.pendingUpdate.timeoutId = -1;
          const updated = this.updateInternal({
            scene: scene2,
            originToWorld: originToWorld2,
            viewToWorld
          });
          if (updated) {
            const gl = this.renderer.getContext();
            gl.flush();
          }
        }, 1);
      }
    }
  }
  updateInternal({
    scene,
    originToWorld,
    viewToWorld
  }) {
    var _a2;
    if (!this.canAllocAccumulator()) {
      return false;
    }
    if (!originToWorld) {
      originToWorld = this.active.toWorld;
    }
    viewToWorld = viewToWorld ?? originToWorld.clone();
    const time = this.time ?? this.clock.getElapsedTime();
    const deltaTime = time - (this.lastUpdateTime ?? time);
    this.lastUpdateTime = time;
    const activeMapping = this.active.mapping.reduce((map, record) => {
      map.set(record.node, record);
      return map;
    }, /* @__PURE__ */ new Map());
    const { generators: generators2, visibleGenerators, globalEdits } = this.compileScene(scene);
    for (const object of generators2) {
      (_a2 = object.frameUpdate) == null ? void 0 : _a2.call(object, {
        object,
        time,
        deltaTime,
        viewToWorld,
        globalEdits
      });
    }
    const visibleGenHash = new Set(visibleGenerators.map((g) => g.uuid));
    for (const object of generators2) {
      const current = activeMapping.get(object);
      const isVisible = object.generator && visibleGenHash.has(object.uuid);
      const numSplats = isVisible ? object.numSplats : 0;
      if (this.needsUpdate || object.generator !== (current == null ? void 0 : current.generator) || numSplats !== (current == null ? void 0 : current.count)) {
        object.updateVersion();
      }
    }
    const originUpdate = !withinCoorientDist({
      matrix1: originToWorld,
      matrix2: this.active.toWorld,
      maxDistance: this.originDistance
    });
    const needsUpdate = this.needsUpdate || originUpdate || generators2.length !== activeMapping.size || generators2.some((g) => {
      var _a3;
      return g.version !== ((_a3 = activeMapping.get(g)) == null ? void 0 : _a3.version);
    });
    this.needsUpdate = false;
    let accumulator = null;
    if (needsUpdate) {
      accumulator = this.maybeAllocAccumulator();
      if (!accumulator) {
        throw new Error("Unreachable");
      }
      const originChanged = !withinCoorientDist({
        matrix1: originToWorld,
        matrix2: accumulator.toWorld,
        maxDistance: 1e-5,
        minCoorient: 0.99999
      });
      const sorted = visibleGenerators.map((g, gIndex) => {
        const lastGen = activeMapping.get(g);
        return !lastGen ? [Number.POSITIVE_INFINITY, g.version, g] : (
          // Sort by version deltas then by previous ordering in the mapping,
          // attempting to keep unchanging generators near the front
          // to improve our chances of avoiding a re-generation.
          [g.version - lastGen.version, lastGen.base, g]
        );
      }).sort((a, b) => {
        if (a[0] !== b[0]) {
          return a[0] - b[0];
        }
        return a[1] - b[1];
      });
      const genOrder = sorted.map(([_version, _seq, g]) => g);
      const splatCounts = genOrder.map((g) => g.numSplats);
      const { maxSplats, mapping } = accumulator.splats.generateMapping(splatCounts);
      const newGenerators = genOrder.map((node, gIndex) => {
        const { base, count } = mapping[gIndex];
        return {
          node,
          generator: node.generator,
          version: node.version,
          base,
          count
        };
      });
      originToWorld.clone().invert().decompose(
        this.translateToAccumulator.value,
        this.rotateToAccumulator.value,
        new Vector3()
      );
      accumulator.ensureGenerate(maxSplats);
      accumulator.splats.splatEncoding = { ...this.splatEncoding };
      accumulator.generateSplats({
        renderer: this.renderer,
        modifier: this.modifier,
        generators: newGenerators,
        forceUpdate: originChanged,
        originToWorld
      });
      accumulator.splatsVersion = this.active.splatsVersion + 1;
      const hasCorrespondence = accumulator.hasCorrespondence(this.active);
      accumulator.mappingVersion = this.active.mappingVersion + (hasCorrespondence ? 0 : 1);
      this.releaseAccumulator(this.active);
      this.active = accumulator;
      this.prepareViewpoint();
    }
    setTimeout(() => {
      for (const view of this.autoViewpoints) {
        view.autoPoll({ accumulator: accumulator ?? void 0 });
      }
    }, 1);
    return true;
  }
  compileScene(scene) {
    const generators2 = [];
    scene.traverse((node) => {
      if (node instanceof SplatGenerator) {
        generators2.push(node);
      }
    });
    const visibleGenerators = [];
    scene.traverseVisible((node) => {
      if (node instanceof SplatGenerator) {
        visibleGenerators.push(node);
      }
    });
    const globalEdits = /* @__PURE__ */ new Set();
    scene.traverseVisible((node) => {
      if (node instanceof SplatEdit) {
        let ancestor = node.parent;
        while (ancestor != null && !(ancestor instanceof SplatMesh)) {
          ancestor = ancestor.parent;
        }
        if (ancestor == null) {
          globalEdits.add(node);
        }
      }
    });
    return {
      generators: generators2,
      visibleGenerators,
      globalEdits: Array.from(globalEdits)
    };
  }
  // Renders out the scene to an environment map that can be used for
  // Image-based lighting or similar applications. First optionally updates Gsplats,
  // sorts them with respect to the provided worldCenter, renders 6 cube faces,
  // then pre-filters them using THREE.PMREMGenerator and returns a THREE.Texture
  // that can assigned directly to a THREE.MeshStandardMaterial.envMap property.
  async renderEnvMap({
    renderer,
    scene,
    worldCenter,
    size = 256,
    near = 0.1,
    far = 1e3,
    hideObjects = [],
    update = false
  }) {
    var _a2, _b2;
    if (!this.envViewpoint) {
      this.envViewpoint = this.newViewpoint({ sort360: true });
    }
    if (!_SparkRenderer2.cubeRender || _SparkRenderer2.cubeRender.target.width !== size || _SparkRenderer2.cubeRender.near !== near || _SparkRenderer2.cubeRender.far !== far) {
      if (_SparkRenderer2.cubeRender) {
        _SparkRenderer2.cubeRender.target.dispose();
      }
      const target2 = new WebGLCubeRenderTarget(size, {
        format: RGBAFormat,
        generateMipmaps: true,
        minFilter: LinearMipMapLinearFilter
      });
      const camera2 = new CubeCamera(near, far, target2);
      _SparkRenderer2.cubeRender = { target: target2, camera: camera2, near, far };
    }
    if (!_SparkRenderer2.pmrem) {
      _SparkRenderer2.pmrem = new PMREMGenerator(renderer ?? this.renderer);
    }
    const viewToWorld = new Matrix4().setPosition(worldCenter);
    await ((_a2 = this.envViewpoint) == null ? void 0 : _a2.prepare({ scene, viewToWorld, update }));
    const { target, camera } = _SparkRenderer2.cubeRender;
    camera.position.copy(worldCenter);
    const objectVisibility = /* @__PURE__ */ new Map();
    for (const object of hideObjects) {
      objectVisibility.set(object, object.visible);
      object.visible = false;
    }
    this.prepareViewpoint(this.envViewpoint);
    camera.update(renderer ?? this.renderer, scene);
    this.prepareViewpoint(this.defaultView);
    for (const [object, visible] of objectVisibility.entries()) {
      object.visible = visible;
    }
    return (_b2 = _SparkRenderer2.pmrem) == null ? void 0 : _b2.fromCubemap(target.texture).texture;
  }
  // Utility function to recursively set the envMap property for any
  // THREE.MeshStandardMaterial within the subtree of root.
  recurseSetEnvMap(root, envMap) {
    root.traverse((node) => {
      if (node instanceof Mesh) {
        if (Array.isArray(node.material)) {
          for (const material of node.material) {
            if (material instanceof MeshStandardMaterial) {
              material.envMap = envMap;
            }
          }
        } else {
          if (node.material instanceof MeshStandardMaterial) {
            node.material.envMap = envMap;
          }
        }
      }
    });
  }
  // Utility function that helps extract the Gsplat RGBA values from a
  // SplatGenerator, including the result of any real-time RGBA SDF edits applied
  // to a SplatMesh. This effectively "bakes" any computed RGBA values, which can
  // now be used as a pipeline input via SplatMesh.splatRgba to inject these
  // baked values into the Gsplat data.
  getRgba({
    generator,
    rgba
  }) {
    const mapping = this.active.mapping.find(({ node }) => node === generator);
    if (!mapping) {
      throw new Error("Generator not found");
    }
    rgba = rgba ?? new RgbaArray();
    rgba.fromPackedSplats({
      packedSplats: this.active.splats,
      base: mapping.base,
      count: mapping.count,
      renderer: this.renderer
    });
    return rgba;
  }
  // Utility function that builds on getRgba({ generator }) and additionally
  // reads back the RGBA values to the CPU in a Uint8Array with packed RGBA
  // in that byte order.
  async readRgba({
    generator,
    rgba
  }) {
    rgba = this.getRgba({ generator, rgba });
    return rgba.read();
  }
};
_SparkRenderer.cubeRender = null;
_SparkRenderer.pmrem = null;
_SparkRenderer.EMPTY_SPLAT_TEXTURE = new Data3DTexture();
let SparkRenderer = _SparkRenderer;
const EMPTY_GEOMETRY = new SplatGeometry(new Uint32Array(1), 0);
dynoBlock(
  { packedSplats: TPackedSplats, index: "int" },
  { gsplat: Gsplat },
  ({ packedSplats, index }) => {
    if (!packedSplats || !index) {
      throw new Error("Invalid input");
    }
    const gsplat = readPackedSplat(packedSplats, index);
    return { gsplat };
  }
);
function averageOriginToWorlds(originToWorlds) {
  if (originToWorlds.length === 0) {
    return null;
  }
  const position = new Vector3();
  const quaternion = new Quaternion();
  const scale = new Vector3();
  const positions = [];
  const quaternions = [];
  for (const matrix of originToWorlds) {
    matrix.decompose(position, quaternion, scale);
    positions.push(position);
    quaternions.push(quaternion);
  }
  return new Matrix4().compose(
    averagePositions(positions),
    averageQuaternions(quaternions),
    new Vector3(1, 1, 1)
  );
}
__name(averageOriginToWorlds, "averageOriginToWorlds");
unindent(`
  struct GsplatSkinning {
    int numSplats;
    int numBones;
    usampler2DArray skinTexture;
    sampler2D boneTexture;
  };
`);
unindent(`
  void applyGsplatSkinning(
    int numSplats, int numBones,
    usampler2DArray skinTexture, sampler2D boneTexture,
    int splatIndex, inout vec3 center, inout vec4 quaternion
  ) {
    if ((splatIndex < 0) || (splatIndex >= numSplats)) {
      return;
    }

    uvec4 skinData = texelFetch(skinTexture, splatTexCoord(splatIndex), 0);

    float weights[4];
    weights[0] = float(skinData.x & 0xffu) / 255.0;
    weights[1] = float(skinData.y & 0xffu) / 255.0;
    weights[2] = float(skinData.z & 0xffu) / 255.0;
    weights[3] = float(skinData.w & 0xffu) / 255.0;

    uint boneIndices[4];
    boneIndices[0] = (skinData.x >> 8u) & 0xffu;
    boneIndices[1] = (skinData.y >> 8u) & 0xffu;
    boneIndices[2] = (skinData.z >> 8u) & 0xffu;
    boneIndices[3] = (skinData.w >> 8u) & 0xffu;

    vec4 quat = vec4(0.0);
    vec4 dual = vec4(0.0);
    for (int i = 0; i < 4; i++) {
      if (weights[i] > 0.0) {
        int boneIndex = int(boneIndices[i]);
        vec4 boneQuat = vec4(0.0, 0.0, 0.0, 1.0);
        vec4 boneDual = vec4(0.0);
        if (boneIndex < numBones) {
          boneQuat = texelFetch(boneTexture, ivec2(2, boneIndex), 0);
          boneDual = texelFetch(boneTexture, ivec2(3, boneIndex), 0);
        }

        if ((i > 0) && (dot(quat, boneQuat) < 0.0)) {
          // Flip sign if next blend is pointing in the opposite direction
          boneQuat = -boneQuat;
          boneDual = -boneDual;
        }
        quat += weights[i] * boneQuat;
        dual += weights[i] * boneDual;
      }
    }

    // Normalize dual quaternion
    float norm = length(quat);
    quat /= norm;
    dual /= norm;
    vec3 translate = vec3(
      2.0 * (-dual.w * quat.x + dual.x * quat.w - dual.y * quat.z + dual.z * quat.y),
      2.0 * (-dual.w * quat.y + dual.x * quat.z + dual.y * quat.w - dual.z * quat.x),
      2.0 * (-dual.w * quat.z - dual.x * quat.y + dual.y * quat.x + dual.z * quat.w)
    );

    center = quatVec(quat, center) + translate;
    quaternion = quatQuat(quat, quaternion);
  }
`);
({
  box: new Box3(
    new Vector3(-1, -1, -1),
    new Vector3(1, 1, 1)
  ),
  fallDirection: new Vector3(-1, -3, 1).normalize(),
  color1: new Color(1, 1, 1),
  color2: new Color(0.5, 0.5, 1),
  anisoScale: new Vector3(1, 1, 1)
});
({
  box: new Box3(
    new Vector3(-2, -1, -2),
    new Vector3(2, 5, 2)
  ),
  fallDirection: new Vector3(0, -1, 0),
  color1: new Color(1, 1, 1),
  color2: new Color(0.25, 0.25, 0.5),
  anisoScale: new Vector3(0.1, 1, 0.1)
});
const _VRButton = class _VRButton2 {
  static {
    __name(this, "_VRButton");
  }
  static createButton(renderer, sessionInit = {}) {
    const navigatorXr = navigator.xr;
    if (!navigatorXr) {
      return null;
    }
    const xr = navigatorXr;
    const button = document.createElement("button");
    renderer.xr.enabled = true;
    renderer.xr.setReferenceSpaceType("local");
    function showEnterVR() {
      let currentSession = null;
      async function onSessionStarted(session) {
        console.log("onSessionStarted");
        session.addEventListener("end", onSessionEnded);
        await renderer.xr.setSession(session);
        button.textContent = "EXIT VR";
        currentSession = session;
      }
      __name(onSessionStarted, "onSessionStarted");
      function onSessionEnded() {
        console.log("onSessionEnded");
        currentSession == null ? void 0 : currentSession.removeEventListener("end", onSessionEnded);
        button.textContent = "ENTER VR";
        currentSession = null;
      }
      __name(onSessionEnded, "onSessionEnded");
      button.style.display = "";
      button.style.cursor = "pointer";
      button.style.left = "calc(50% - 100px)";
      button.style.width = "200px";
      button.style.height = "100px";
      button.textContent = "ENTER VR";
      const sessionOptions = {
        ...sessionInit,
        optionalFeatures: [
          // "local-floor",
          // "bounded-floor",
          // "layers",
          ...sessionInit.optionalFeatures || []
        ]
      };
      button.onmouseenter = () => {
        button.style.opacity = "1.0";
      };
      button.onmouseleave = () => {
        button.style.opacity = "0.5";
      };
      button.onclick = () => {
        if (currentSession === null) {
          console.log("requesting session");
          xr.requestSession("immersive-vr", sessionOptions).then(
            onSessionStarted
          );
        } else {
          console.log("ending session");
          currentSession.end();
        }
      };
    }
    __name(showEnterVR, "showEnterVR");
    function disableButton() {
      button.style.display = "none";
      button.style.cursor = "auto";
      button.style.left = "calc(50% - 75px)";
      button.style.width = "150px";
      button.onmouseenter = null;
      button.onmouseleave = null;
      button.onclick = null;
    }
    __name(disableButton, "disableButton");
    function showWebXRNotFound() {
      disableButton();
      button.textContent = "VR NOT SUPPORTED";
    }
    __name(showWebXRNotFound, "showWebXRNotFound");
    function showVRNotAllowed(exception) {
      disableButton();
      console.warn(
        "Exception when trying to call xr.isSessionSupported",
        exception
      );
      button.textContent = "VR NOT ALLOWED";
    }
    __name(showVRNotAllowed, "showVRNotAllowed");
    function stylizeElement(element) {
      element.style.position = "absolute";
      element.style.bottom = "20px";
      element.style.padding = "12px 6px";
      element.style.border = "1px solid #fff";
      element.style.borderRadius = "4px";
      element.style.background = "rgba(0,0,0,0.1)";
      element.style.color = "#fff";
      element.style.font = "normal 13px sans-serif";
      element.style.textAlign = "center";
      element.style.opacity = "0.5";
      element.style.outline = "none";
      element.style.zIndex = "999";
    }
    __name(stylizeElement, "stylizeElement");
    button.id = "VRButton";
    button.style.display = "none";
    stylizeElement(button);
    xr.isSessionSupported("immersive-vr").then((supported) => {
      supported ? showEnterVR() : showWebXRNotFound();
      if (supported && _VRButton2.xrSessionIsGranted) {
        button.click();
      }
    }).catch(showVRNotAllowed);
    return button;
  }
  static registerSessionGrantedListener() {
    const navigatorXr = navigator.xr;
    if (!navigatorXr) {
      return null;
    }
    const xr = navigatorXr;
    if (/WebXRViewer\//i.test(navigator.userAgent)) return;
    xr.addEventListener("sessiongranted", () => {
      _VRButton2.xrSessionIsGranted = true;
    });
  }
};
_VRButton.xrSessionIsGranted = false;
let VRButton = _VRButton;
VRButton.registerSessionGrantedListener();
var JointEnum = /* @__PURE__ */ ((JointEnum2) => {
  JointEnum2["w"] = "wrist";
  JointEnum2["t0"] = "thumb-metacarpal";
  JointEnum2["t1"] = "thumb-phalanx-proximal";
  JointEnum2["t2"] = "thumb-phalanx-distal";
  JointEnum2["t3"] = "thumb-tip";
  JointEnum2["i0"] = "index-finger-metacarpal";
  JointEnum2["i1"] = "index-finger-phalanx-proximal";
  JointEnum2["i2"] = "index-finger-phalanx-intermediate";
  JointEnum2["i3"] = "index-finger-phalanx-distal";
  JointEnum2["i4"] = "index-finger-tip";
  JointEnum2["m0"] = "middle-finger-metacarpal";
  JointEnum2["m1"] = "middle-finger-phalanx-proximal";
  JointEnum2["m2"] = "middle-finger-phalanx-intermediate";
  JointEnum2["m3"] = "middle-finger-phalanx-distal";
  JointEnum2["m4"] = "middle-finger-tip";
  JointEnum2["r0"] = "ring-finger-metacarpal";
  JointEnum2["r1"] = "ring-finger-phalanx-proximal";
  JointEnum2["r2"] = "ring-finger-phalanx-intermediate";
  JointEnum2["r3"] = "ring-finger-phalanx-distal";
  JointEnum2["r4"] = "ring-finger-tip";
  JointEnum2["p0"] = "pinky-finger-metacarpal";
  JointEnum2["p1"] = "pinky-finger-phalanx-proximal";
  JointEnum2["p2"] = "pinky-finger-phalanx-intermediate";
  JointEnum2["p3"] = "pinky-finger-phalanx-distal";
  JointEnum2["p4"] = "pinky-finger-tip";
  return JointEnum2;
})(JointEnum || {});
const JOINT_IDS = Object.keys(JointEnum);
JOINT_IDS.length;
({
  KeyW: new Vector3(0, 0, -1),
  KeyS: new Vector3(0, 0, 1),
  KeyA: new Vector3(-1, 0, 0),
  KeyD: new Vector3(1, 0, 0),
  KeyR: new Vector3(0, 1, 0),
  KeyF: new Vector3(0, -1, 0)
});
({
  ArrowUp: new Vector3(0, 0, -1),
  ArrowDown: new Vector3(0, 0, 1),
  ArrowLeft: new Vector3(-1, 0, 0),
  ArrowRight: new Vector3(1, 0, 0),
  PageUp: new Vector3(0, 1, 0),
  PageDown: new Vector3(0, -1, 0)
});
({
  KeyQ: new Vector3(0, 0, 1),
  KeyE: new Vector3(0, 0, -1)
});
({
  Home: new Vector3(0, -1, 0),
  End: new Vector3(0, 1, 0),
  Insert: new Vector3(-1, 0, 0),
  Delete: new Vector3(1, 0, 0)
});
const _color = new Color();
class PLYLoader extends Loader {
  static {
    __name(this, "PLYLoader");
  }
  constructor(manager) {
    super(manager);
    this.propertyNameMapping = {};
    this.customPropertyMapping = {};
  }
  load(url, onLoad, onProgress, onError) {
    const scope = this;
    const loader = new FileLoader(this.manager);
    loader.setPath(this.path);
    loader.setResponseType("arraybuffer");
    loader.setRequestHeader(this.requestHeader);
    loader.setWithCredentials(this.withCredentials);
    loader.load(url, function(text) {
      try {
        onLoad(scope.parse(text));
      } catch (e) {
        if (onError) {
          onError(e);
        } else {
          console.error(e);
        }
        scope.manager.itemError(url);
      }
    }, onProgress, onError);
  }
  setPropertyNameMapping(mapping) {
    this.propertyNameMapping = mapping;
  }
  setCustomPropertyNameMapping(mapping) {
    this.customPropertyMapping = mapping;
  }
  parse(data) {
    function parseHeader(data2, headerLength = 0) {
      const patternHeader = /^ply([\s\S]*)end_header(\r\n|\r|\n)/;
      let headerText = "";
      const result = patternHeader.exec(data2);
      if (result !== null) {
        headerText = result[1];
      }
      const header = {
        comments: [],
        elements: [],
        headerLength,
        objInfo: ""
      };
      const lines = headerText.split(/\r\n|\r|\n/);
      let currentElement;
      function make_ply_element_property(propertValues, propertyNameMapping) {
        const property = { type: propertValues[0] };
        if (property.type === "list") {
          property.name = propertValues[3];
          property.countType = propertValues[1];
          property.itemType = propertValues[2];
        } else {
          property.name = propertValues[1];
        }
        if (property.name in propertyNameMapping) {
          property.name = propertyNameMapping[property.name];
        }
        return property;
      }
      __name(make_ply_element_property, "make_ply_element_property");
      for (let i = 0; i < lines.length; i++) {
        let line = lines[i];
        line = line.trim();
        if (line === "") continue;
        const lineValues = line.split(/\s+/);
        const lineType = lineValues.shift();
        line = lineValues.join(" ");
        switch (lineType) {
          case "format":
            header.format = lineValues[0];
            header.version = lineValues[1];
            break;
          case "comment":
            header.comments.push(line);
            break;
          case "element":
            if (currentElement !== void 0) {
              header.elements.push(currentElement);
            }
            currentElement = {};
            currentElement.name = lineValues[0];
            currentElement.count = parseInt(lineValues[1]);
            currentElement.properties = [];
            break;
          case "property":
            currentElement.properties.push(make_ply_element_property(lineValues, scope.propertyNameMapping));
            break;
          case "obj_info":
            header.objInfo = line;
            break;
          default:
            console.log("unhandled", lineType, lineValues);
        }
      }
      if (currentElement !== void 0) {
        header.elements.push(currentElement);
      }
      return header;
    }
    __name(parseHeader, "parseHeader");
    function parseASCIINumber(n, type) {
      switch (type) {
        case "char":
        case "uchar":
        case "short":
        case "ushort":
        case "int":
        case "uint":
        case "int8":
        case "uint8":
        case "int16":
        case "uint16":
        case "int32":
        case "uint32":
          return parseInt(n);
        case "float":
        case "double":
        case "float32":
        case "float64":
          return parseFloat(n);
      }
    }
    __name(parseASCIINumber, "parseASCIINumber");
    function parseASCIIElement(properties, tokens) {
      const element = {};
      for (let i = 0; i < properties.length; i++) {
        if (tokens.empty()) return null;
        if (properties[i].type === "list") {
          const list = [];
          const n = parseASCIINumber(tokens.next(), properties[i].countType);
          for (let j = 0; j < n; j++) {
            if (tokens.empty()) return null;
            list.push(parseASCIINumber(tokens.next(), properties[i].itemType));
          }
          element[properties[i].name] = list;
        } else {
          element[properties[i].name] = parseASCIINumber(tokens.next(), properties[i].type);
        }
      }
      return element;
    }
    __name(parseASCIIElement, "parseASCIIElement");
    function createBuffer() {
      const buffer = {
        indices: [],
        vertices: [],
        normals: [],
        uvs: [],
        faceVertexUvs: [],
        colors: [],
        faceVertexColors: []
      };
      for (const customProperty of Object.keys(scope.customPropertyMapping)) {
        buffer[customProperty] = [];
      }
      return buffer;
    }
    __name(createBuffer, "createBuffer");
    function mapElementAttributes(properties) {
      const elementNames = properties.map((property) => {
        return property.name;
      });
      function findAttrName(names) {
        for (let i = 0, l = names.length; i < l; i++) {
          const name = names[i];
          if (elementNames.includes(name)) return name;
        }
        return null;
      }
      __name(findAttrName, "findAttrName");
      return {
        attrX: findAttrName(["x", "px", "posx"]) || "x",
        attrY: findAttrName(["y", "py", "posy"]) || "y",
        attrZ: findAttrName(["z", "pz", "posz"]) || "z",
        attrNX: findAttrName(["nx", "normalx"]),
        attrNY: findAttrName(["ny", "normaly"]),
        attrNZ: findAttrName(["nz", "normalz"]),
        attrS: findAttrName(["s", "u", "texture_u", "tx"]),
        attrT: findAttrName(["t", "v", "texture_v", "ty"]),
        attrR: findAttrName(["red", "diffuse_red", "r", "diffuse_r"]),
        attrG: findAttrName(["green", "diffuse_green", "g", "diffuse_g"]),
        attrB: findAttrName(["blue", "diffuse_blue", "b", "diffuse_b"])
      };
    }
    __name(mapElementAttributes, "mapElementAttributes");
    function parseASCII(data2, header) {
      const buffer = createBuffer();
      const patternBody = /end_header\s+(\S[\s\S]*\S|\S)\s*$/;
      let body, matches;
      if ((matches = patternBody.exec(data2)) !== null) {
        body = matches[1].split(/\s+/);
      } else {
        body = [];
      }
      const tokens = new ArrayStream(body);
      loop: for (let i = 0; i < header.elements.length; i++) {
        const elementDesc = header.elements[i];
        const attributeMap = mapElementAttributes(elementDesc.properties);
        for (let j = 0; j < elementDesc.count; j++) {
          const element = parseASCIIElement(elementDesc.properties, tokens);
          if (!element) break loop;
          handleElement(buffer, elementDesc.name, element, attributeMap);
        }
      }
      return postProcess(buffer);
    }
    __name(parseASCII, "parseASCII");
    function postProcess(buffer) {
      let geometry2 = new BufferGeometry();
      if (buffer.indices.length > 0) {
        geometry2.setIndex(buffer.indices);
      }
      geometry2.setAttribute("position", new Float32BufferAttribute(buffer.vertices, 3));
      if (buffer.normals.length > 0) {
        geometry2.setAttribute("normal", new Float32BufferAttribute(buffer.normals, 3));
      }
      if (buffer.uvs.length > 0) {
        geometry2.setAttribute("uv", new Float32BufferAttribute(buffer.uvs, 2));
      }
      if (buffer.colors.length > 0) {
        geometry2.setAttribute("color", new Float32BufferAttribute(buffer.colors, 3));
      }
      if (buffer.faceVertexUvs.length > 0 || buffer.faceVertexColors.length > 0) {
        geometry2 = geometry2.toNonIndexed();
        if (buffer.faceVertexUvs.length > 0) geometry2.setAttribute("uv", new Float32BufferAttribute(buffer.faceVertexUvs, 2));
        if (buffer.faceVertexColors.length > 0) geometry2.setAttribute("color", new Float32BufferAttribute(buffer.faceVertexColors, 3));
      }
      for (const customProperty of Object.keys(scope.customPropertyMapping)) {
        if (buffer[customProperty].length > 0) {
          geometry2.setAttribute(
            customProperty,
            new Float32BufferAttribute(
              buffer[customProperty],
              scope.customPropertyMapping[customProperty].length
            )
          );
        }
      }
      geometry2.computeBoundingSphere();
      return geometry2;
    }
    __name(postProcess, "postProcess");
    function handleElement(buffer, elementName, element, cacheEntry) {
      if (elementName === "vertex") {
        buffer.vertices.push(element[cacheEntry.attrX], element[cacheEntry.attrY], element[cacheEntry.attrZ]);
        if (cacheEntry.attrNX !== null && cacheEntry.attrNY !== null && cacheEntry.attrNZ !== null) {
          buffer.normals.push(element[cacheEntry.attrNX], element[cacheEntry.attrNY], element[cacheEntry.attrNZ]);
        }
        if (cacheEntry.attrS !== null && cacheEntry.attrT !== null) {
          buffer.uvs.push(element[cacheEntry.attrS], element[cacheEntry.attrT]);
        }
        if (cacheEntry.attrR !== null && cacheEntry.attrG !== null && cacheEntry.attrB !== null) {
          _color.setRGB(
            element[cacheEntry.attrR] / 255,
            element[cacheEntry.attrG] / 255,
            element[cacheEntry.attrB] / 255,
            SRGBColorSpace
          );
          buffer.colors.push(_color.r, _color.g, _color.b);
        }
        for (const customProperty of Object.keys(scope.customPropertyMapping)) {
          for (const elementProperty of scope.customPropertyMapping[customProperty]) {
            buffer[customProperty].push(element[elementProperty]);
          }
        }
      } else if (elementName === "face") {
        const vertex_indices = element.vertex_indices || element.vertex_index;
        const texcoord = element.texcoord;
        if (vertex_indices.length === 3) {
          buffer.indices.push(vertex_indices[0], vertex_indices[1], vertex_indices[2]);
          if (texcoord && texcoord.length === 6) {
            buffer.faceVertexUvs.push(texcoord[0], texcoord[1]);
            buffer.faceVertexUvs.push(texcoord[2], texcoord[3]);
            buffer.faceVertexUvs.push(texcoord[4], texcoord[5]);
          }
        } else if (vertex_indices.length === 4) {
          buffer.indices.push(vertex_indices[0], vertex_indices[1], vertex_indices[3]);
          buffer.indices.push(vertex_indices[1], vertex_indices[2], vertex_indices[3]);
        }
        if (cacheEntry.attrR !== null && cacheEntry.attrG !== null && cacheEntry.attrB !== null) {
          _color.setRGB(
            element[cacheEntry.attrR] / 255,
            element[cacheEntry.attrG] / 255,
            element[cacheEntry.attrB] / 255,
            SRGBColorSpace
          );
          buffer.faceVertexColors.push(_color.r, _color.g, _color.b);
          buffer.faceVertexColors.push(_color.r, _color.g, _color.b);
          buffer.faceVertexColors.push(_color.r, _color.g, _color.b);
        }
      }
    }
    __name(handleElement, "handleElement");
    function binaryReadElement(at, properties) {
      const element = {};
      let read = 0;
      for (let i = 0; i < properties.length; i++) {
        const property = properties[i];
        const valueReader = property.valueReader;
        if (property.type === "list") {
          const list = [];
          const n = property.countReader.read(at + read);
          read += property.countReader.size;
          for (let j = 0; j < n; j++) {
            list.push(valueReader.read(at + read));
            read += valueReader.size;
          }
          element[property.name] = list;
        } else {
          element[property.name] = valueReader.read(at + read);
          read += valueReader.size;
        }
      }
      return [element, read];
    }
    __name(binaryReadElement, "binaryReadElement");
    function setPropertyBinaryReaders(properties, body, little_endian) {
      function getBinaryReader(dataview, type, little_endian2) {
        switch (type) {
          // corespondences for non-specific length types here match rply:
          case "int8":
          case "char":
            return { read: /* @__PURE__ */ __name((at) => {
              return dataview.getInt8(at);
            }, "read"), size: 1 };
          case "uint8":
          case "uchar":
            return { read: /* @__PURE__ */ __name((at) => {
              return dataview.getUint8(at);
            }, "read"), size: 1 };
          case "int16":
          case "short":
            return { read: /* @__PURE__ */ __name((at) => {
              return dataview.getInt16(at, little_endian2);
            }, "read"), size: 2 };
          case "uint16":
          case "ushort":
            return { read: /* @__PURE__ */ __name((at) => {
              return dataview.getUint16(at, little_endian2);
            }, "read"), size: 2 };
          case "int32":
          case "int":
            return { read: /* @__PURE__ */ __name((at) => {
              return dataview.getInt32(at, little_endian2);
            }, "read"), size: 4 };
          case "uint32":
          case "uint":
            return { read: /* @__PURE__ */ __name((at) => {
              return dataview.getUint32(at, little_endian2);
            }, "read"), size: 4 };
          case "float32":
          case "float":
            return { read: /* @__PURE__ */ __name((at) => {
              return dataview.getFloat32(at, little_endian2);
            }, "read"), size: 4 };
          case "float64":
          case "double":
            return { read: /* @__PURE__ */ __name((at) => {
              return dataview.getFloat64(at, little_endian2);
            }, "read"), size: 8 };
        }
      }
      __name(getBinaryReader, "getBinaryReader");
      for (let i = 0, l = properties.length; i < l; i++) {
        const property = properties[i];
        if (property.type === "list") {
          property.countReader = getBinaryReader(body, property.countType, little_endian);
          property.valueReader = getBinaryReader(body, property.itemType, little_endian);
        } else {
          property.valueReader = getBinaryReader(body, property.type, little_endian);
        }
      }
    }
    __name(setPropertyBinaryReaders, "setPropertyBinaryReaders");
    function parseBinary(data2, header) {
      const buffer = createBuffer();
      const little_endian = header.format === "binary_little_endian";
      const body = new DataView(data2, header.headerLength);
      let result, loc = 0;
      for (let currentElement = 0; currentElement < header.elements.length; currentElement++) {
        const elementDesc = header.elements[currentElement];
        const properties = elementDesc.properties;
        const attributeMap = mapElementAttributes(properties);
        setPropertyBinaryReaders(properties, body, little_endian);
        for (let currentElementCount = 0; currentElementCount < elementDesc.count; currentElementCount++) {
          result = binaryReadElement(loc, properties);
          loc += result[1];
          const element = result[0];
          handleElement(buffer, elementDesc.name, element, attributeMap);
        }
      }
      return postProcess(buffer);
    }
    __name(parseBinary, "parseBinary");
    function extractHeaderText(bytes) {
      let i = 0;
      let cont = true;
      let line = "";
      const lines = [];
      const startLine = new TextDecoder().decode(bytes.subarray(0, 5));
      const hasCRNL = /^ply\r\n/.test(startLine);
      do {
        const c = String.fromCharCode(bytes[i++]);
        if (c !== "\n" && c !== "\r") {
          line += c;
        } else {
          if (line === "end_header") cont = false;
          if (line !== "") {
            lines.push(line);
            line = "";
          }
        }
      } while (cont && i < bytes.length);
      if (hasCRNL === true) i++;
      return { headerText: lines.join("\r") + "\r", headerLength: i };
    }
    __name(extractHeaderText, "extractHeaderText");
    let geometry;
    const scope = this;
    if (data instanceof ArrayBuffer) {
      const bytes = new Uint8Array(data);
      const { headerText, headerLength } = extractHeaderText(bytes);
      const header = parseHeader(headerText, headerLength);
      if (header.format === "ascii") {
        const text = new TextDecoder().decode(bytes);
        geometry = parseASCII(text, header);
      } else {
        geometry = parseBinary(data, header);
      }
    } else {
      geometry = parseASCII(data, parseHeader(data));
    }
    return geometry;
  }
}
class ArrayStream {
  static {
    __name(this, "ArrayStream");
  }
  constructor(arr) {
    this.arr = arr;
    this.i = 0;
  }
  empty() {
    return this.i >= this.arr.length;
  }
  next() {
    return this.arr[this.i++];
  }
}
const KHR_mesh_quantization_ExtraAttrTypes = {
  POSITION: [
    "byte",
    "byte normalized",
    "unsigned byte",
    "unsigned byte normalized",
    "short",
    "short normalized",
    "unsigned short",
    "unsigned short normalized"
  ],
  NORMAL: [
    "byte normalized",
    "short normalized"
  ],
  TANGENT: [
    "byte normalized",
    "short normalized"
  ],
  TEXCOORD: [
    "byte",
    "byte normalized",
    "unsigned byte",
    "short",
    "short normalized",
    "unsigned short"
  ]
};
class GLTFExporter {
  static {
    __name(this, "GLTFExporter");
  }
  constructor() {
    this.textureUtils = null;
    this.pluginCallbacks = [];
    this.register(function(writer) {
      return new GLTFLightExtension(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsUnlitExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsTransmissionExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsVolumeExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsIorExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsSpecularExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsClearcoatExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsDispersionExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsIridescenceExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsSheenExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsAnisotropyExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsEmissiveStrengthExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMaterialsBumpExtension2(writer);
    });
    this.register(function(writer) {
      return new GLTFMeshGpuInstancing2(writer);
    });
  }
  register(callback) {
    if (this.pluginCallbacks.indexOf(callback) === -1) {
      this.pluginCallbacks.push(callback);
    }
    return this;
  }
  unregister(callback) {
    if (this.pluginCallbacks.indexOf(callback) !== -1) {
      this.pluginCallbacks.splice(this.pluginCallbacks.indexOf(callback), 1);
    }
    return this;
  }
  setTextureUtils(utils) {
    this.textureUtils = utils;
    return this;
  }
  /**
   * Parse scenes and generate GLTF output
   * @param  {Scene or [THREE.Scenes]} input   Scene or Array of THREE.Scenes
   * @param  {Function} onDone  Callback on completed
   * @param  {Function} onError  Callback on errors
   * @param  {Object} options options
   */
  parse(input, onDone, onError, options) {
    const writer = new GLTFWriter();
    const plugins = [];
    for (let i = 0, il = this.pluginCallbacks.length; i < il; i++) {
      plugins.push(this.pluginCallbacks[i](writer));
    }
    writer.setPlugins(plugins);
    writer.setTextureUtils(this.textureUtils);
    writer.writeAsync(input, onDone, options).catch(onError);
  }
  parseAsync(input, options) {
    const scope = this;
    return new Promise(function(resolve, reject) {
      scope.parse(input, resolve, reject, options);
    });
  }
}
const WEBGL_CONSTANTS = {
  POINTS: 0,
  LINES: 1,
  LINE_LOOP: 2,
  LINE_STRIP: 3,
  TRIANGLES: 4,
  BYTE: 5120,
  UNSIGNED_BYTE: 5121,
  SHORT: 5122,
  UNSIGNED_SHORT: 5123,
  INT: 5124,
  UNSIGNED_INT: 5125,
  FLOAT: 5126,
  ARRAY_BUFFER: 34962,
  ELEMENT_ARRAY_BUFFER: 34963,
  NEAREST: 9728,
  LINEAR: 9729,
  NEAREST_MIPMAP_NEAREST: 9984,
  LINEAR_MIPMAP_NEAREST: 9985,
  NEAREST_MIPMAP_LINEAR: 9986,
  LINEAR_MIPMAP_LINEAR: 9987,
  CLAMP_TO_EDGE: 33071,
  MIRRORED_REPEAT: 33648,
  REPEAT: 10497
};
const KHR_MESH_QUANTIZATION = "KHR_mesh_quantization";
const THREE_TO_WEBGL = {};
THREE_TO_WEBGL[NearestFilter] = WEBGL_CONSTANTS.NEAREST;
THREE_TO_WEBGL[NearestMipmapNearestFilter] = WEBGL_CONSTANTS.NEAREST_MIPMAP_NEAREST;
THREE_TO_WEBGL[NearestMipmapLinearFilter] = WEBGL_CONSTANTS.NEAREST_MIPMAP_LINEAR;
THREE_TO_WEBGL[LinearFilter] = WEBGL_CONSTANTS.LINEAR;
THREE_TO_WEBGL[LinearMipmapNearestFilter] = WEBGL_CONSTANTS.LINEAR_MIPMAP_NEAREST;
THREE_TO_WEBGL[LinearMipmapLinearFilter] = WEBGL_CONSTANTS.LINEAR_MIPMAP_LINEAR;
THREE_TO_WEBGL[ClampToEdgeWrapping] = WEBGL_CONSTANTS.CLAMP_TO_EDGE;
THREE_TO_WEBGL[RepeatWrapping] = WEBGL_CONSTANTS.REPEAT;
THREE_TO_WEBGL[MirroredRepeatWrapping] = WEBGL_CONSTANTS.MIRRORED_REPEAT;
const PATH_PROPERTIES = {
  scale: "scale",
  position: "translation",
  quaternion: "rotation",
  morphTargetInfluences: "weights"
};
const DEFAULT_SPECULAR_COLOR = new Color();
const GLB_HEADER_BYTES = 12;
const GLB_HEADER_MAGIC = 1179937895;
const GLB_VERSION = 2;
const GLB_CHUNK_PREFIX_BYTES = 8;
const GLB_CHUNK_TYPE_JSON = 1313821514;
const GLB_CHUNK_TYPE_BIN = 5130562;
function equalArray(array1, array2) {
  return array1.length === array2.length && array1.every(function(element, index) {
    return element === array2[index];
  });
}
__name(equalArray, "equalArray");
function stringToArrayBuffer(text) {
  return new TextEncoder().encode(text).buffer;
}
__name(stringToArrayBuffer, "stringToArrayBuffer");
function isIdentityMatrix(matrix) {
  return equalArray(matrix.elements, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1]);
}
__name(isIdentityMatrix, "isIdentityMatrix");
function getMinMax(attribute, start, count) {
  const output = {
    min: new Array(attribute.itemSize).fill(Number.POSITIVE_INFINITY),
    max: new Array(attribute.itemSize).fill(Number.NEGATIVE_INFINITY)
  };
  for (let i = start; i < start + count; i++) {
    for (let a = 0; a < attribute.itemSize; a++) {
      let value;
      if (attribute.itemSize > 4) {
        value = attribute.array[i * attribute.itemSize + a];
      } else {
        if (a === 0) value = attribute.getX(i);
        else if (a === 1) value = attribute.getY(i);
        else if (a === 2) value = attribute.getZ(i);
        else if (a === 3) value = attribute.getW(i);
        if (attribute.normalized === true) {
          value = MathUtils.normalize(value, attribute.array);
        }
      }
      output.min[a] = Math.min(output.min[a], value);
      output.max[a] = Math.max(output.max[a], value);
    }
  }
  return output;
}
__name(getMinMax, "getMinMax");
function getPaddedBufferSize(bufferSize) {
  return Math.ceil(bufferSize / 4) * 4;
}
__name(getPaddedBufferSize, "getPaddedBufferSize");
function getPaddedArrayBuffer(arrayBuffer, paddingByte = 0) {
  const paddedLength = getPaddedBufferSize(arrayBuffer.byteLength);
  if (paddedLength !== arrayBuffer.byteLength) {
    const array = new Uint8Array(paddedLength);
    array.set(new Uint8Array(arrayBuffer));
    if (paddingByte !== 0) {
      for (let i = arrayBuffer.byteLength; i < paddedLength; i++) {
        array[i] = paddingByte;
      }
    }
    return array.buffer;
  }
  return arrayBuffer;
}
__name(getPaddedArrayBuffer, "getPaddedArrayBuffer");
function getCanvas() {
  if (typeof document === "undefined" && typeof OffscreenCanvas !== "undefined") {
    return new OffscreenCanvas(1, 1);
  }
  return document.createElement("canvas");
}
__name(getCanvas, "getCanvas");
function getToBlobPromise(canvas, mimeType) {
  if (canvas.toBlob !== void 0) {
    return new Promise((resolve) => canvas.toBlob(resolve, mimeType));
  }
  let quality;
  if (mimeType === "image/jpeg") {
    quality = 0.92;
  } else if (mimeType === "image/webp") {
    quality = 0.8;
  }
  return canvas.convertToBlob({
    type: mimeType,
    quality
  });
}
__name(getToBlobPromise, "getToBlobPromise");
class GLTFWriter {
  static {
    __name(this, "GLTFWriter");
  }
  constructor() {
    this.plugins = [];
    this.options = {};
    this.pending = [];
    this.buffers = [];
    this.byteOffset = 0;
    this.buffers = [];
    this.nodeMap = /* @__PURE__ */ new Map();
    this.skins = [];
    this.extensionsUsed = {};
    this.extensionsRequired = {};
    this.uids = /* @__PURE__ */ new Map();
    this.uid = 0;
    this.json = {
      asset: {
        version: "2.0",
        generator: "THREE.GLTFExporter r" + REVISION
      }
    };
    this.cache = {
      meshes: /* @__PURE__ */ new Map(),
      attributes: /* @__PURE__ */ new Map(),
      attributesNormalized: /* @__PURE__ */ new Map(),
      materials: /* @__PURE__ */ new Map(),
      textures: /* @__PURE__ */ new Map(),
      images: /* @__PURE__ */ new Map()
    };
    this.textureUtils = null;
  }
  setPlugins(plugins) {
    this.plugins = plugins;
  }
  setTextureUtils(utils) {
    this.textureUtils = utils;
  }
  /**
   * Parse scenes and generate GLTF output
   * @param  {Scene or [THREE.Scenes]} input   Scene or Array of THREE.Scenes
   * @param  {Function} onDone  Callback on completed
   * @param  {Object} options options
   */
  async writeAsync(input, onDone, options = {}) {
    this.options = Object.assign({
      // default options
      binary: false,
      trs: false,
      onlyVisible: true,
      maxTextureSize: Infinity,
      animations: [],
      includeCustomExtensions: false
    }, options);
    if (this.options.animations.length > 0) {
      this.options.trs = true;
    }
    await this.processInputAsync(input);
    await Promise.all(this.pending);
    const writer = this;
    const buffers = writer.buffers;
    const json = writer.json;
    options = writer.options;
    const extensionsUsed = writer.extensionsUsed;
    const extensionsRequired = writer.extensionsRequired;
    const blob2 = new Blob(buffers, { type: "application/octet-stream" });
    const extensionsUsedList = Object.keys(extensionsUsed);
    const extensionsRequiredList = Object.keys(extensionsRequired);
    if (extensionsUsedList.length > 0) json.extensionsUsed = extensionsUsedList;
    if (extensionsRequiredList.length > 0) json.extensionsRequired = extensionsRequiredList;
    if (json.buffers && json.buffers.length > 0) json.buffers[0].byteLength = blob2.size;
    if (options.binary === true) {
      const reader = new FileReader();
      reader.readAsArrayBuffer(blob2);
      reader.onloadend = function() {
        const binaryChunk = getPaddedArrayBuffer(reader.result);
        const binaryChunkPrefix = new DataView(new ArrayBuffer(GLB_CHUNK_PREFIX_BYTES));
        binaryChunkPrefix.setUint32(0, binaryChunk.byteLength, true);
        binaryChunkPrefix.setUint32(4, GLB_CHUNK_TYPE_BIN, true);
        const jsonChunk = getPaddedArrayBuffer(stringToArrayBuffer(JSON.stringify(json)), 32);
        const jsonChunkPrefix = new DataView(new ArrayBuffer(GLB_CHUNK_PREFIX_BYTES));
        jsonChunkPrefix.setUint32(0, jsonChunk.byteLength, true);
        jsonChunkPrefix.setUint32(4, GLB_CHUNK_TYPE_JSON, true);
        const header = new ArrayBuffer(GLB_HEADER_BYTES);
        const headerView = new DataView(header);
        headerView.setUint32(0, GLB_HEADER_MAGIC, true);
        headerView.setUint32(4, GLB_VERSION, true);
        const totalByteLength = GLB_HEADER_BYTES + jsonChunkPrefix.byteLength + jsonChunk.byteLength + binaryChunkPrefix.byteLength + binaryChunk.byteLength;
        headerView.setUint32(8, totalByteLength, true);
        const glbBlob = new Blob([
          header,
          jsonChunkPrefix,
          jsonChunk,
          binaryChunkPrefix,
          binaryChunk
        ], { type: "application/octet-stream" });
        const glbReader = new FileReader();
        glbReader.readAsArrayBuffer(glbBlob);
        glbReader.onloadend = function() {
          onDone(glbReader.result);
        };
      };
    } else {
      if (json.buffers && json.buffers.length > 0) {
        const reader = new FileReader();
        reader.readAsDataURL(blob2);
        reader.onloadend = function() {
          const base64data = reader.result;
          json.buffers[0].uri = base64data;
          onDone(json);
        };
      } else {
        onDone(json);
      }
    }
  }
  /**
   * Serializes a userData.
   *
   * @param {THREE.Object3D|THREE.Material} object
   * @param {Object} objectDef
   */
  serializeUserData(object, objectDef) {
    if (Object.keys(object.userData).length === 0) return;
    const options = this.options;
    const extensionsUsed = this.extensionsUsed;
    try {
      const json = JSON.parse(JSON.stringify(object.userData));
      if (options.includeCustomExtensions && json.gltfExtensions) {
        if (objectDef.extensions === void 0) objectDef.extensions = {};
        for (const extensionName in json.gltfExtensions) {
          objectDef.extensions[extensionName] = json.gltfExtensions[extensionName];
          extensionsUsed[extensionName] = true;
        }
        delete json.gltfExtensions;
      }
      if (Object.keys(json).length > 0) objectDef.extras = json;
    } catch (error) {
      console.warn("THREE.GLTFExporter: userData of '" + object.name + "' won't be serialized because of JSON.stringify error - " + error.message);
    }
  }
  /**
   * Returns ids for buffer attributes.
   * @param  {Object} object
   * @return {Integer}
   */
  getUID(attribute, isRelativeCopy = false) {
    if (this.uids.has(attribute) === false) {
      const uids2 = /* @__PURE__ */ new Map();
      uids2.set(true, this.uid++);
      uids2.set(false, this.uid++);
      this.uids.set(attribute, uids2);
    }
    const uids = this.uids.get(attribute);
    return uids.get(isRelativeCopy);
  }
  /**
   * Checks if normal attribute values are normalized.
   *
   * @param {BufferAttribute} normal
   * @returns {Boolean}
   */
  isNormalizedNormalAttribute(normal) {
    const cache = this.cache;
    if (cache.attributesNormalized.has(normal)) return false;
    const v = new Vector3();
    for (let i = 0, il = normal.count; i < il; i++) {
      if (Math.abs(v.fromBufferAttribute(normal, i).length() - 1) > 5e-4) return false;
    }
    return true;
  }
  /**
   * Creates normalized normal buffer attribute.
   *
   * @param {BufferAttribute} normal
   * @returns {BufferAttribute}
   *
   */
  createNormalizedNormalAttribute(normal) {
    const cache = this.cache;
    if (cache.attributesNormalized.has(normal)) return cache.attributesNormalized.get(normal);
    const attribute = normal.clone();
    const v = new Vector3();
    for (let i = 0, il = attribute.count; i < il; i++) {
      v.fromBufferAttribute(attribute, i);
      if (v.x === 0 && v.y === 0 && v.z === 0) {
        v.setX(1);
      } else {
        v.normalize();
      }
      attribute.setXYZ(i, v.x, v.y, v.z);
    }
    cache.attributesNormalized.set(normal, attribute);
    return attribute;
  }
  /**
   * Applies a texture transform, if present, to the map definition. Requires
   * the KHR_texture_transform extension.
   *
   * @param {Object} mapDef
   * @param {THREE.Texture} texture
   */
  applyTextureTransform(mapDef, texture) {
    let didTransform = false;
    const transformDef = {};
    if (texture.offset.x !== 0 || texture.offset.y !== 0) {
      transformDef.offset = texture.offset.toArray();
      didTransform = true;
    }
    if (texture.rotation !== 0) {
      transformDef.rotation = texture.rotation;
      didTransform = true;
    }
    if (texture.repeat.x !== 1 || texture.repeat.y !== 1) {
      transformDef.scale = texture.repeat.toArray();
      didTransform = true;
    }
    if (didTransform) {
      mapDef.extensions = mapDef.extensions || {};
      mapDef.extensions["KHR_texture_transform"] = transformDef;
      this.extensionsUsed["KHR_texture_transform"] = true;
    }
  }
  async buildMetalRoughTextureAsync(metalnessMap, roughnessMap) {
    if (metalnessMap === roughnessMap) return metalnessMap;
    function getEncodingConversion(map) {
      if (map.colorSpace === SRGBColorSpace) {
        return /* @__PURE__ */ __name(function SRGBToLinear2(c) {
          return c < 0.04045 ? c * 0.0773993808 : Math.pow(c * 0.9478672986 + 0.0521327014, 2.4);
        }, "SRGBToLinear");
      }
      return /* @__PURE__ */ __name(function LinearToLinear(c) {
        return c;
      }, "LinearToLinear");
    }
    __name(getEncodingConversion, "getEncodingConversion");
    if (metalnessMap instanceof CompressedTexture) {
      metalnessMap = await this.decompressTextureAsync(metalnessMap);
    }
    if (roughnessMap instanceof CompressedTexture) {
      roughnessMap = await this.decompressTextureAsync(roughnessMap);
    }
    const metalness = metalnessMap ? metalnessMap.image : null;
    const roughness = roughnessMap ? roughnessMap.image : null;
    const width = Math.max(metalness ? metalness.width : 0, roughness ? roughness.width : 0);
    const height = Math.max(metalness ? metalness.height : 0, roughness ? roughness.height : 0);
    const canvas = getCanvas();
    canvas.width = width;
    canvas.height = height;
    const context = canvas.getContext("2d", {
      willReadFrequently: true
    });
    context.fillStyle = "#00ffff";
    context.fillRect(0, 0, width, height);
    const composite = context.getImageData(0, 0, width, height);
    if (metalness) {
      context.drawImage(metalness, 0, 0, width, height);
      const convert = getEncodingConversion(metalnessMap);
      const data = context.getImageData(0, 0, width, height).data;
      for (let i = 2; i < data.length; i += 4) {
        composite.data[i] = convert(data[i] / 256) * 256;
      }
    }
    if (roughness) {
      context.drawImage(roughness, 0, 0, width, height);
      const convert = getEncodingConversion(roughnessMap);
      const data = context.getImageData(0, 0, width, height).data;
      for (let i = 1; i < data.length; i += 4) {
        composite.data[i] = convert(data[i] / 256) * 256;
      }
    }
    context.putImageData(composite, 0, 0);
    const reference = metalnessMap || roughnessMap;
    const texture = reference.clone();
    texture.source = new Source(canvas);
    texture.colorSpace = NoColorSpace;
    texture.channel = (metalnessMap || roughnessMap).channel;
    if (metalnessMap && roughnessMap && metalnessMap.channel !== roughnessMap.channel) {
      console.warn("THREE.GLTFExporter: UV channels for metalnessMap and roughnessMap textures must match.");
    }
    console.warn("THREE.GLTFExporter: Merged metalnessMap and roughnessMap textures.");
    return texture;
  }
  async decompressTextureAsync(texture, maxTextureSize = Infinity) {
    if (this.textureUtils === null) {
      throw new Error("THREE.GLTFExporter: setTextureUtils() must be called to process compressed textures.");
    }
    return await this.textureUtils.decompress(texture, maxTextureSize);
  }
  /**
   * Process a buffer to append to the default one.
   * @param  {ArrayBuffer} buffer
   * @return {Integer}
   */
  processBuffer(buffer) {
    const json = this.json;
    const buffers = this.buffers;
    if (!json.buffers) json.buffers = [{ byteLength: 0 }];
    buffers.push(buffer);
    return 0;
  }
  /**
   * Process and generate a BufferView
   * @param  {BufferAttribute} attribute
   * @param  {number} componentType
   * @param  {number} start
   * @param  {number} count
   * @param  {number} target (Optional) Target usage of the BufferView
   * @return {Object}
   */
  processBufferView(attribute, componentType, start, count, target) {
    const json = this.json;
    if (!json.bufferViews) json.bufferViews = [];
    let componentSize;
    switch (componentType) {
      case WEBGL_CONSTANTS.BYTE:
      case WEBGL_CONSTANTS.UNSIGNED_BYTE:
        componentSize = 1;
        break;
      case WEBGL_CONSTANTS.SHORT:
      case WEBGL_CONSTANTS.UNSIGNED_SHORT:
        componentSize = 2;
        break;
      default:
        componentSize = 4;
    }
    let byteStride = attribute.itemSize * componentSize;
    if (target === WEBGL_CONSTANTS.ARRAY_BUFFER) {
      byteStride = Math.ceil(byteStride / 4) * 4;
    }
    const byteLength = getPaddedBufferSize(count * byteStride);
    const dataView = new DataView(new ArrayBuffer(byteLength));
    let offset = 0;
    for (let i = start; i < start + count; i++) {
      for (let a = 0; a < attribute.itemSize; a++) {
        let value;
        if (attribute.itemSize > 4) {
          value = attribute.array[i * attribute.itemSize + a];
        } else {
          if (a === 0) value = attribute.getX(i);
          else if (a === 1) value = attribute.getY(i);
          else if (a === 2) value = attribute.getZ(i);
          else if (a === 3) value = attribute.getW(i);
          if (attribute.normalized === true) {
            value = MathUtils.normalize(value, attribute.array);
          }
        }
        if (componentType === WEBGL_CONSTANTS.FLOAT) {
          dataView.setFloat32(offset, value, true);
        } else if (componentType === WEBGL_CONSTANTS.INT) {
          dataView.setInt32(offset, value, true);
        } else if (componentType === WEBGL_CONSTANTS.UNSIGNED_INT) {
          dataView.setUint32(offset, value, true);
        } else if (componentType === WEBGL_CONSTANTS.SHORT) {
          dataView.setInt16(offset, value, true);
        } else if (componentType === WEBGL_CONSTANTS.UNSIGNED_SHORT) {
          dataView.setUint16(offset, value, true);
        } else if (componentType === WEBGL_CONSTANTS.BYTE) {
          dataView.setInt8(offset, value);
        } else if (componentType === WEBGL_CONSTANTS.UNSIGNED_BYTE) {
          dataView.setUint8(offset, value);
        }
        offset += componentSize;
      }
      if (offset % byteStride !== 0) {
        offset += byteStride - offset % byteStride;
      }
    }
    const bufferViewDef = {
      buffer: this.processBuffer(dataView.buffer),
      byteOffset: this.byteOffset,
      byteLength
    };
    if (target !== void 0) bufferViewDef.target = target;
    if (target === WEBGL_CONSTANTS.ARRAY_BUFFER) {
      bufferViewDef.byteStride = byteStride;
    }
    this.byteOffset += byteLength;
    json.bufferViews.push(bufferViewDef);
    const output = {
      id: json.bufferViews.length - 1,
      byteLength: 0
    };
    return output;
  }
  /**
   * Process and generate a BufferView from an image Blob.
   * @param {Blob} blob
   * @return {Promise<Integer>}
   */
  processBufferViewImage(blob2) {
    const writer = this;
    const json = writer.json;
    if (!json.bufferViews) json.bufferViews = [];
    return new Promise(function(resolve) {
      const reader = new FileReader();
      reader.readAsArrayBuffer(blob2);
      reader.onloadend = function() {
        const buffer = getPaddedArrayBuffer(reader.result);
        const bufferViewDef = {
          buffer: writer.processBuffer(buffer),
          byteOffset: writer.byteOffset,
          byteLength: buffer.byteLength
        };
        writer.byteOffset += buffer.byteLength;
        resolve(json.bufferViews.push(bufferViewDef) - 1);
      };
    });
  }
  /**
   * Process attribute to generate an accessor
   * @param  {BufferAttribute} attribute Attribute to process
   * @param  {THREE.BufferGeometry} geometry (Optional) Geometry used for truncated draw range
   * @param  {Integer} start (Optional)
   * @param  {Integer} count (Optional)
   * @return {Integer|null} Index of the processed accessor on the "accessors" array
   */
  processAccessor(attribute, geometry, start, count) {
    const json = this.json;
    const types = {
      1: "SCALAR",
      2: "VEC2",
      3: "VEC3",
      4: "VEC4",
      9: "MAT3",
      16: "MAT4"
    };
    let componentType;
    if (attribute.array.constructor === Float32Array) {
      componentType = WEBGL_CONSTANTS.FLOAT;
    } else if (attribute.array.constructor === Int32Array) {
      componentType = WEBGL_CONSTANTS.INT;
    } else if (attribute.array.constructor === Uint32Array) {
      componentType = WEBGL_CONSTANTS.UNSIGNED_INT;
    } else if (attribute.array.constructor === Int16Array) {
      componentType = WEBGL_CONSTANTS.SHORT;
    } else if (attribute.array.constructor === Uint16Array) {
      componentType = WEBGL_CONSTANTS.UNSIGNED_SHORT;
    } else if (attribute.array.constructor === Int8Array) {
      componentType = WEBGL_CONSTANTS.BYTE;
    } else if (attribute.array.constructor === Uint8Array) {
      componentType = WEBGL_CONSTANTS.UNSIGNED_BYTE;
    } else {
      throw new Error("THREE.GLTFExporter: Unsupported bufferAttribute component type: " + attribute.array.constructor.name);
    }
    if (start === void 0) start = 0;
    if (count === void 0 || count === Infinity) count = attribute.count;
    if (count === 0) return null;
    const minMax = getMinMax(attribute, start, count);
    let bufferViewTarget;
    if (geometry !== void 0) {
      bufferViewTarget = attribute === geometry.index ? WEBGL_CONSTANTS.ELEMENT_ARRAY_BUFFER : WEBGL_CONSTANTS.ARRAY_BUFFER;
    }
    const bufferView = this.processBufferView(attribute, componentType, start, count, bufferViewTarget);
    const accessorDef = {
      bufferView: bufferView.id,
      byteOffset: bufferView.byteOffset,
      componentType,
      count,
      max: minMax.max,
      min: minMax.min,
      type: types[attribute.itemSize]
    };
    if (attribute.normalized === true) accessorDef.normalized = true;
    if (!json.accessors) json.accessors = [];
    return json.accessors.push(accessorDef) - 1;
  }
  /**
   * Process image
   * @param  {Image} image to process
   * @param  {Integer} format of the image (RGBAFormat)
   * @param  {Boolean} flipY before writing out the image
   * @param  {String} mimeType export format
   * @return {Integer}     Index of the processed texture in the "images" array
   */
  processImage(image, format, flipY, mimeType = "image/png") {
    if (image !== null) {
      const writer = this;
      const cache = writer.cache;
      const json = writer.json;
      const options = writer.options;
      const pending = writer.pending;
      if (!cache.images.has(image)) cache.images.set(image, {});
      const cachedImages = cache.images.get(image);
      const key = mimeType + ":flipY/" + flipY.toString();
      if (cachedImages[key] !== void 0) return cachedImages[key];
      if (!json.images) json.images = [];
      const imageDef = { mimeType };
      const canvas = getCanvas();
      canvas.width = Math.min(image.width, options.maxTextureSize);
      canvas.height = Math.min(image.height, options.maxTextureSize);
      const ctx = canvas.getContext("2d", {
        willReadFrequently: true
      });
      if (flipY === true) {
        ctx.translate(0, canvas.height);
        ctx.scale(1, -1);
      }
      if (image.data !== void 0) {
        if (format !== RGBAFormat) {
          console.error("GLTFExporter: Only RGBAFormat is supported.", format);
        }
        if (image.width > options.maxTextureSize || image.height > options.maxTextureSize) {
          console.warn("GLTFExporter: Image size is bigger than maxTextureSize", image);
        }
        const data = new Uint8ClampedArray(image.height * image.width * 4);
        for (let i = 0; i < data.length; i += 4) {
          data[i + 0] = image.data[i + 0];
          data[i + 1] = image.data[i + 1];
          data[i + 2] = image.data[i + 2];
          data[i + 3] = image.data[i + 3];
        }
        ctx.putImageData(new ImageData(data, image.width, image.height), 0, 0);
      } else {
        if (typeof HTMLImageElement !== "undefined" && image instanceof HTMLImageElement || typeof HTMLCanvasElement !== "undefined" && image instanceof HTMLCanvasElement || typeof ImageBitmap !== "undefined" && image instanceof ImageBitmap || typeof OffscreenCanvas !== "undefined" && image instanceof OffscreenCanvas) {
          ctx.drawImage(image, 0, 0, canvas.width, canvas.height);
        } else {
          throw new Error("THREE.GLTFExporter: Invalid image type. Use HTMLImageElement, HTMLCanvasElement, ImageBitmap or OffscreenCanvas.");
        }
      }
      if (options.binary === true) {
        pending.push(
          getToBlobPromise(canvas, mimeType).then((blob2) => writer.processBufferViewImage(blob2)).then((bufferViewIndex) => {
            imageDef.bufferView = bufferViewIndex;
          })
        );
      } else {
        if (canvas.toDataURL !== void 0) {
          imageDef.uri = canvas.toDataURL(mimeType);
        } else {
          pending.push(
            getToBlobPromise(canvas, mimeType).then((blob2) => new FileReader().readAsDataURL(blob2)).then((dataURL) => {
              imageDef.uri = dataURL;
            })
          );
        }
      }
      const index = json.images.push(imageDef) - 1;
      cachedImages[key] = index;
      return index;
    } else {
      throw new Error("THREE.GLTFExporter: No valid image data found. Unable to process texture.");
    }
  }
  /**
   * Process sampler
   * @param  {Texture} map Texture to process
   * @return {Integer}     Index of the processed texture in the "samplers" array
   */
  processSampler(map) {
    const json = this.json;
    if (!json.samplers) json.samplers = [];
    const samplerDef = {
      magFilter: THREE_TO_WEBGL[map.magFilter],
      minFilter: THREE_TO_WEBGL[map.minFilter],
      wrapS: THREE_TO_WEBGL[map.wrapS],
      wrapT: THREE_TO_WEBGL[map.wrapT]
    };
    return json.samplers.push(samplerDef) - 1;
  }
  /**
   * Process texture
   * @param  {Texture} map Map to process
   * @return {Integer} Index of the processed texture in the "textures" array
   */
  async processTextureAsync(map) {
    const writer = this;
    const options = writer.options;
    const cache = this.cache;
    const json = this.json;
    if (cache.textures.has(map)) return cache.textures.get(map);
    if (!json.textures) json.textures = [];
    if (map instanceof CompressedTexture) {
      map = await this.decompressTextureAsync(map, options.maxTextureSize);
    }
    let mimeType = map.userData.mimeType;
    if (mimeType === "image/webp") mimeType = "image/png";
    const textureDef = {
      sampler: this.processSampler(map),
      source: this.processImage(map.image, map.format, map.flipY, mimeType)
    };
    if (map.name) textureDef.name = map.name;
    await this._invokeAllAsync(async function(ext) {
      ext.writeTexture && await ext.writeTexture(map, textureDef);
    });
    const index = json.textures.push(textureDef) - 1;
    cache.textures.set(map, index);
    return index;
  }
  /**
   * Process material
   * @param  {THREE.Material} material Material to process
   * @return {Integer|null} Index of the processed material in the "materials" array
   */
  async processMaterialAsync(material) {
    const cache = this.cache;
    const json = this.json;
    if (cache.materials.has(material)) return cache.materials.get(material);
    if (material.isShaderMaterial) {
      console.warn("GLTFExporter: THREE.ShaderMaterial not supported.");
      return null;
    }
    if (!json.materials) json.materials = [];
    const materialDef = { pbrMetallicRoughness: {} };
    if (material.isMeshStandardMaterial !== true && material.isMeshBasicMaterial !== true) {
      console.warn("GLTFExporter: Use MeshStandardMaterial or MeshBasicMaterial for best results.");
    }
    const color = material.color.toArray().concat([material.opacity]);
    if (!equalArray(color, [1, 1, 1, 1])) {
      materialDef.pbrMetallicRoughness.baseColorFactor = color;
    }
    if (material.isMeshStandardMaterial) {
      materialDef.pbrMetallicRoughness.metallicFactor = material.metalness;
      materialDef.pbrMetallicRoughness.roughnessFactor = material.roughness;
    } else {
      materialDef.pbrMetallicRoughness.metallicFactor = 0;
      materialDef.pbrMetallicRoughness.roughnessFactor = 1;
    }
    if (material.metalnessMap || material.roughnessMap) {
      const metalRoughTexture = await this.buildMetalRoughTextureAsync(material.metalnessMap, material.roughnessMap);
      const metalRoughMapDef = {
        index: await this.processTextureAsync(metalRoughTexture),
        texCoord: metalRoughTexture.channel
      };
      this.applyTextureTransform(metalRoughMapDef, metalRoughTexture);
      materialDef.pbrMetallicRoughness.metallicRoughnessTexture = metalRoughMapDef;
    }
    if (material.map) {
      const baseColorMapDef = {
        index: await this.processTextureAsync(material.map),
        texCoord: material.map.channel
      };
      this.applyTextureTransform(baseColorMapDef, material.map);
      materialDef.pbrMetallicRoughness.baseColorTexture = baseColorMapDef;
    }
    if (material.emissive) {
      const emissive = material.emissive;
      const maxEmissiveComponent = Math.max(emissive.r, emissive.g, emissive.b);
      if (maxEmissiveComponent > 0) {
        materialDef.emissiveFactor = material.emissive.toArray();
      }
      if (material.emissiveMap) {
        const emissiveMapDef = {
          index: await this.processTextureAsync(material.emissiveMap),
          texCoord: material.emissiveMap.channel
        };
        this.applyTextureTransform(emissiveMapDef, material.emissiveMap);
        materialDef.emissiveTexture = emissiveMapDef;
      }
    }
    if (material.normalMap) {
      const normalMapDef = {
        index: await this.processTextureAsync(material.normalMap),
        texCoord: material.normalMap.channel
      };
      if (material.normalScale && material.normalScale.x !== 1) {
        normalMapDef.scale = material.normalScale.x;
      }
      this.applyTextureTransform(normalMapDef, material.normalMap);
      materialDef.normalTexture = normalMapDef;
    }
    if (material.aoMap) {
      const occlusionMapDef = {
        index: await this.processTextureAsync(material.aoMap),
        texCoord: material.aoMap.channel
      };
      if (material.aoMapIntensity !== 1) {
        occlusionMapDef.strength = material.aoMapIntensity;
      }
      this.applyTextureTransform(occlusionMapDef, material.aoMap);
      materialDef.occlusionTexture = occlusionMapDef;
    }
    if (material.transparent) {
      materialDef.alphaMode = "BLEND";
    } else {
      if (material.alphaTest > 0) {
        materialDef.alphaMode = "MASK";
        materialDef.alphaCutoff = material.alphaTest;
      }
    }
    if (material.side === DoubleSide) materialDef.doubleSided = true;
    if (material.name !== "") materialDef.name = material.name;
    this.serializeUserData(material, materialDef);
    await this._invokeAllAsync(async function(ext) {
      ext.writeMaterialAsync && await ext.writeMaterialAsync(material, materialDef);
    });
    const index = json.materials.push(materialDef) - 1;
    cache.materials.set(material, index);
    return index;
  }
  /**
   * Process mesh
   * @param  {THREE.Mesh} mesh Mesh to process
   * @return {Integer|null} Index of the processed mesh in the "meshes" array
   */
  async processMeshAsync(mesh) {
    const cache = this.cache;
    const json = this.json;
    const meshCacheKeyParts = [mesh.geometry.uuid];
    if (Array.isArray(mesh.material)) {
      for (let i = 0, l = mesh.material.length; i < l; i++) {
        meshCacheKeyParts.push(mesh.material[i].uuid);
      }
    } else {
      meshCacheKeyParts.push(mesh.material.uuid);
    }
    const meshCacheKey = meshCacheKeyParts.join(":");
    if (cache.meshes.has(meshCacheKey)) return cache.meshes.get(meshCacheKey);
    const geometry = mesh.geometry;
    let mode;
    if (mesh.isLineSegments) {
      mode = WEBGL_CONSTANTS.LINES;
    } else if (mesh.isLineLoop) {
      mode = WEBGL_CONSTANTS.LINE_LOOP;
    } else if (mesh.isLine) {
      mode = WEBGL_CONSTANTS.LINE_STRIP;
    } else if (mesh.isPoints) {
      mode = WEBGL_CONSTANTS.POINTS;
    } else {
      mode = mesh.material.wireframe ? WEBGL_CONSTANTS.LINES : WEBGL_CONSTANTS.TRIANGLES;
    }
    const meshDef = {};
    const attributes = {};
    const primitives = [];
    const targets = [];
    const nameConversion = {
      uv: "TEXCOORD_0",
      uv1: "TEXCOORD_1",
      uv2: "TEXCOORD_2",
      uv3: "TEXCOORD_3",
      color: "COLOR_0",
      skinWeight: "WEIGHTS_0",
      skinIndex: "JOINTS_0"
    };
    const originalNormal = geometry.getAttribute("normal");
    if (originalNormal !== void 0 && !this.isNormalizedNormalAttribute(originalNormal)) {
      console.warn("THREE.GLTFExporter: Creating normalized normal attribute from the non-normalized one.");
      geometry.setAttribute("normal", this.createNormalizedNormalAttribute(originalNormal));
    }
    let modifiedAttribute = null;
    for (let attributeName in geometry.attributes) {
      if (attributeName.slice(0, 5) === "morph") continue;
      const attribute = geometry.attributes[attributeName];
      attributeName = nameConversion[attributeName] || attributeName.toUpperCase();
      const validVertexAttributes = /^(POSITION|NORMAL|TANGENT|TEXCOORD_\d+|COLOR_\d+|JOINTS_\d+|WEIGHTS_\d+)$/;
      if (!validVertexAttributes.test(attributeName)) attributeName = "_" + attributeName;
      if (cache.attributes.has(this.getUID(attribute))) {
        attributes[attributeName] = cache.attributes.get(this.getUID(attribute));
        continue;
      }
      modifiedAttribute = null;
      const array = attribute.array;
      if (attributeName === "JOINTS_0" && !(array instanceof Uint16Array) && !(array instanceof Uint8Array)) {
        console.warn('GLTFExporter: Attribute "skinIndex" converted to type UNSIGNED_SHORT.');
        modifiedAttribute = new BufferAttribute(new Uint16Array(array), attribute.itemSize, attribute.normalized);
      } else if ((array instanceof Uint32Array || array instanceof Int32Array) && !attributeName.startsWith("_")) {
        console.warn(`GLTFExporter: Attribute "${attributeName}" converted to type FLOAT.`);
        modifiedAttribute = GLTFExporter.Utils.toFloat32BufferAttribute(attribute);
      }
      const accessor = this.processAccessor(modifiedAttribute || attribute, geometry);
      if (accessor !== null) {
        if (!attributeName.startsWith("_")) {
          this.detectMeshQuantization(attributeName, attribute);
        }
        attributes[attributeName] = accessor;
        cache.attributes.set(this.getUID(attribute), accessor);
      }
    }
    if (originalNormal !== void 0) geometry.setAttribute("normal", originalNormal);
    if (Object.keys(attributes).length === 0) return null;
    if (mesh.morphTargetInfluences !== void 0 && mesh.morphTargetInfluences.length > 0) {
      const weights = [];
      const targetNames = [];
      const reverseDictionary = {};
      if (mesh.morphTargetDictionary !== void 0) {
        for (const key in mesh.morphTargetDictionary) {
          reverseDictionary[mesh.morphTargetDictionary[key]] = key;
        }
      }
      for (let i = 0; i < mesh.morphTargetInfluences.length; ++i) {
        const target = {};
        let warned = false;
        for (const attributeName in geometry.morphAttributes) {
          if (attributeName !== "position" && attributeName !== "normal") {
            if (!warned) {
              console.warn("GLTFExporter: Only POSITION and NORMAL morph are supported.");
              warned = true;
            }
            continue;
          }
          const attribute = geometry.morphAttributes[attributeName][i];
          const gltfAttributeName = attributeName.toUpperCase();
          const baseAttribute = geometry.attributes[attributeName];
          if (cache.attributes.has(this.getUID(attribute, true))) {
            target[gltfAttributeName] = cache.attributes.get(this.getUID(attribute, true));
            continue;
          }
          const relativeAttribute = attribute.clone();
          if (!geometry.morphTargetsRelative) {
            for (let j = 0, jl = attribute.count; j < jl; j++) {
              for (let a = 0; a < attribute.itemSize; a++) {
                if (a === 0) relativeAttribute.setX(j, attribute.getX(j) - baseAttribute.getX(j));
                if (a === 1) relativeAttribute.setY(j, attribute.getY(j) - baseAttribute.getY(j));
                if (a === 2) relativeAttribute.setZ(j, attribute.getZ(j) - baseAttribute.getZ(j));
                if (a === 3) relativeAttribute.setW(j, attribute.getW(j) - baseAttribute.getW(j));
              }
            }
          }
          target[gltfAttributeName] = this.processAccessor(relativeAttribute, geometry);
          cache.attributes.set(this.getUID(baseAttribute, true), target[gltfAttributeName]);
        }
        targets.push(target);
        weights.push(mesh.morphTargetInfluences[i]);
        if (mesh.morphTargetDictionary !== void 0) targetNames.push(reverseDictionary[i]);
      }
      meshDef.weights = weights;
      if (targetNames.length > 0) {
        meshDef.extras = {};
        meshDef.extras.targetNames = targetNames;
      }
    }
    const isMultiMaterial = Array.isArray(mesh.material);
    if (isMultiMaterial && geometry.groups.length === 0) return null;
    let didForceIndices = false;
    if (isMultiMaterial && geometry.index === null) {
      const indices = [];
      for (let i = 0, il = geometry.attributes.position.count; i < il; i++) {
        indices[i] = i;
      }
      geometry.setIndex(indices);
      didForceIndices = true;
    }
    const materials = isMultiMaterial ? mesh.material : [mesh.material];
    const groups = isMultiMaterial ? geometry.groups : [{ materialIndex: 0, start: void 0, count: void 0 }];
    for (let i = 0, il = groups.length; i < il; i++) {
      const primitive = {
        mode,
        attributes
      };
      this.serializeUserData(geometry, primitive);
      if (targets.length > 0) primitive.targets = targets;
      if (geometry.index !== null) {
        let cacheKey = this.getUID(geometry.index);
        if (groups[i].start !== void 0 || groups[i].count !== void 0) {
          cacheKey += ":" + groups[i].start + ":" + groups[i].count;
        }
        if (cache.attributes.has(cacheKey)) {
          primitive.indices = cache.attributes.get(cacheKey);
        } else {
          primitive.indices = this.processAccessor(geometry.index, geometry, groups[i].start, groups[i].count);
          cache.attributes.set(cacheKey, primitive.indices);
        }
        if (primitive.indices === null) delete primitive.indices;
      }
      const material = await this.processMaterialAsync(materials[groups[i].materialIndex]);
      if (material !== null) primitive.material = material;
      primitives.push(primitive);
    }
    if (didForceIndices === true) {
      geometry.setIndex(null);
    }
    meshDef.primitives = primitives;
    if (!json.meshes) json.meshes = [];
    await this._invokeAllAsync(function(ext) {
      ext.writeMesh && ext.writeMesh(mesh, meshDef);
    });
    const index = json.meshes.push(meshDef) - 1;
    cache.meshes.set(meshCacheKey, index);
    return index;
  }
  /**
   * If a vertex attribute with a
   * [non-standard data type](https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html#meshes-overview)
   * is used, it is checked whether it is a valid data type according to the
   * [KHR_mesh_quantization](https://github.com/KhronosGroup/glTF/blob/main/extensions/2.0/Khronos/KHR_mesh_quantization/README.md)
   * extension.
   * In this case the extension is automatically added to the list of used extensions.
   *
   * @param {string} attributeName
   * @param {THREE.BufferAttribute} attribute
   */
  detectMeshQuantization(attributeName, attribute) {
    if (this.extensionsUsed[KHR_MESH_QUANTIZATION]) return;
    let attrType = void 0;
    switch (attribute.array.constructor) {
      case Int8Array:
        attrType = "byte";
        break;
      case Uint8Array:
        attrType = "unsigned byte";
        break;
      case Int16Array:
        attrType = "short";
        break;
      case Uint16Array:
        attrType = "unsigned short";
        break;
      default:
        return;
    }
    if (attribute.normalized) attrType += " normalized";
    const attrNamePrefix = attributeName.split("_", 1)[0];
    if (KHR_mesh_quantization_ExtraAttrTypes[attrNamePrefix] && KHR_mesh_quantization_ExtraAttrTypes[attrNamePrefix].includes(attrType)) {
      this.extensionsUsed[KHR_MESH_QUANTIZATION] = true;
      this.extensionsRequired[KHR_MESH_QUANTIZATION] = true;
    }
  }
  /**
   * Process camera
   * @param  {THREE.Camera} camera Camera to process
   * @return {Integer}      Index of the processed mesh in the "camera" array
   */
  processCamera(camera) {
    const json = this.json;
    if (!json.cameras) json.cameras = [];
    const isOrtho = camera.isOrthographicCamera;
    const cameraDef = {
      type: isOrtho ? "orthographic" : "perspective"
    };
    if (isOrtho) {
      cameraDef.orthographic = {
        xmag: camera.right * 2,
        ymag: camera.top * 2,
        zfar: camera.far <= 0 ? 1e-3 : camera.far,
        znear: camera.near < 0 ? 0 : camera.near
      };
    } else {
      cameraDef.perspective = {
        aspectRatio: camera.aspect,
        yfov: MathUtils.degToRad(camera.fov),
        zfar: camera.far <= 0 ? 1e-3 : camera.far,
        znear: camera.near < 0 ? 0 : camera.near
      };
    }
    if (camera.name !== "") cameraDef.name = camera.type;
    return json.cameras.push(cameraDef) - 1;
  }
  /**
   * Creates glTF animation entry from AnimationClip object.
   *
   * Status:
   * - Only properties listed in PATH_PROPERTIES may be animated.
   *
   * @param {THREE.AnimationClip} clip
   * @param {THREE.Object3D} root
   * @return {number|null}
   */
  processAnimation(clip, root) {
    const json = this.json;
    const nodeMap = this.nodeMap;
    if (!json.animations) json.animations = [];
    clip = GLTFExporter.Utils.mergeMorphTargetTracks(clip.clone(), root);
    const tracks = clip.tracks;
    const channels = [];
    const samplers = [];
    for (let i = 0; i < tracks.length; ++i) {
      const track = tracks[i];
      const trackBinding = PropertyBinding.parseTrackName(track.name);
      let trackNode = PropertyBinding.findNode(root, trackBinding.nodeName);
      const trackProperty = PATH_PROPERTIES[trackBinding.propertyName];
      if (trackBinding.objectName === "bones") {
        if (trackNode.isSkinnedMesh === true) {
          trackNode = trackNode.skeleton.getBoneByName(trackBinding.objectIndex);
        } else {
          trackNode = void 0;
        }
      }
      if (!trackNode || !trackProperty) {
        console.warn('THREE.GLTFExporter: Could not export animation track "%s".', track.name);
        continue;
      }
      const inputItemSize = 1;
      let outputItemSize = track.values.length / track.times.length;
      if (trackProperty === PATH_PROPERTIES.morphTargetInfluences) {
        outputItemSize /= trackNode.morphTargetInfluences.length;
      }
      let interpolation;
      if (track.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline === true) {
        interpolation = "CUBICSPLINE";
        outputItemSize /= 3;
      } else if (track.getInterpolation() === InterpolateDiscrete) {
        interpolation = "STEP";
      } else {
        interpolation = "LINEAR";
      }
      samplers.push({
        input: this.processAccessor(new BufferAttribute(track.times, inputItemSize)),
        output: this.processAccessor(new BufferAttribute(track.values, outputItemSize)),
        interpolation
      });
      channels.push({
        sampler: samplers.length - 1,
        target: {
          node: nodeMap.get(trackNode),
          path: trackProperty
        }
      });
    }
    json.animations.push({
      name: clip.name || "clip_" + json.animations.length,
      samplers,
      channels
    });
    return json.animations.length - 1;
  }
  /**
   * @param {THREE.Object3D} object
   * @return {number|null}
   */
  processSkin(object) {
    const json = this.json;
    const nodeMap = this.nodeMap;
    const node = json.nodes[nodeMap.get(object)];
    const skeleton = object.skeleton;
    if (skeleton === void 0) return null;
    const rootJoint = object.skeleton.bones[0];
    if (rootJoint === void 0) return null;
    const joints = [];
    const inverseBindMatrices = new Float32Array(skeleton.bones.length * 16);
    const temporaryBoneInverse = new Matrix4();
    for (let i = 0; i < skeleton.bones.length; ++i) {
      joints.push(nodeMap.get(skeleton.bones[i]));
      temporaryBoneInverse.copy(skeleton.boneInverses[i]);
      temporaryBoneInverse.multiply(object.bindMatrix).toArray(inverseBindMatrices, i * 16);
    }
    if (json.skins === void 0) json.skins = [];
    json.skins.push({
      inverseBindMatrices: this.processAccessor(new BufferAttribute(inverseBindMatrices, 16)),
      joints,
      skeleton: nodeMap.get(rootJoint)
    });
    const skinIndex = node.skin = json.skins.length - 1;
    return skinIndex;
  }
  /**
   * Process Object3D node
   * @param  {THREE.Object3D} node Object3D to processNodeAsync
   * @return {Integer} Index of the node in the nodes list
   */
  async processNodeAsync(object) {
    const json = this.json;
    const options = this.options;
    const nodeMap = this.nodeMap;
    if (!json.nodes) json.nodes = [];
    const nodeDef = {};
    if (options.trs) {
      const rotation = object.quaternion.toArray();
      const position = object.position.toArray();
      const scale = object.scale.toArray();
      if (!equalArray(rotation, [0, 0, 0, 1])) {
        nodeDef.rotation = rotation;
      }
      if (!equalArray(position, [0, 0, 0])) {
        nodeDef.translation = position;
      }
      if (!equalArray(scale, [1, 1, 1])) {
        nodeDef.scale = scale;
      }
    } else {
      if (object.matrixAutoUpdate) {
        object.updateMatrix();
      }
      if (isIdentityMatrix(object.matrix) === false) {
        nodeDef.matrix = object.matrix.elements;
      }
    }
    if (object.name !== "") nodeDef.name = String(object.name);
    this.serializeUserData(object, nodeDef);
    if (object.isMesh || object.isLine || object.isPoints) {
      const meshIndex = await this.processMeshAsync(object);
      if (meshIndex !== null) nodeDef.mesh = meshIndex;
    } else if (object.isCamera) {
      nodeDef.camera = this.processCamera(object);
    }
    if (object.isSkinnedMesh) this.skins.push(object);
    if (object.children.length > 0) {
      const children = [];
      for (let i = 0, l = object.children.length; i < l; i++) {
        const child = object.children[i];
        if (child.visible || options.onlyVisible === false) {
          const nodeIndex2 = await this.processNodeAsync(child);
          if (nodeIndex2 !== null) children.push(nodeIndex2);
        }
      }
      if (children.length > 0) nodeDef.children = children;
    }
    await this._invokeAllAsync(function(ext) {
      ext.writeNode && ext.writeNode(object, nodeDef);
    });
    const nodeIndex = json.nodes.push(nodeDef) - 1;
    nodeMap.set(object, nodeIndex);
    return nodeIndex;
  }
  /**
   * Process Scene
   * @param  {Scene} node Scene to process
   */
  async processSceneAsync(scene) {
    const json = this.json;
    const options = this.options;
    if (!json.scenes) {
      json.scenes = [];
      json.scene = 0;
    }
    const sceneDef = {};
    if (scene.name !== "") sceneDef.name = scene.name;
    json.scenes.push(sceneDef);
    const nodes = [];
    for (let i = 0, l = scene.children.length; i < l; i++) {
      const child = scene.children[i];
      if (child.visible || options.onlyVisible === false) {
        const nodeIndex = await this.processNodeAsync(child);
        if (nodeIndex !== null) nodes.push(nodeIndex);
      }
    }
    if (nodes.length > 0) sceneDef.nodes = nodes;
    this.serializeUserData(scene, sceneDef);
  }
  /**
   * Creates a Scene to hold a list of objects and parse it
   * @param  {Array} objects List of objects to process
   */
  async processObjectsAsync(objects) {
    const scene = new Scene();
    scene.name = "AuxScene";
    for (let i = 0; i < objects.length; i++) {
      scene.children.push(objects[i]);
    }
    await this.processSceneAsync(scene);
  }
  /**
   * @param {THREE.Object3D|Array<THREE.Object3D>} input
   */
  async processInputAsync(input) {
    const options = this.options;
    input = input instanceof Array ? input : [input];
    await this._invokeAllAsync(function(ext) {
      ext.beforeParse && ext.beforeParse(input);
    });
    const objectsWithoutScene = [];
    for (let i = 0; i < input.length; i++) {
      if (input[i] instanceof Scene) {
        await this.processSceneAsync(input[i]);
      } else {
        objectsWithoutScene.push(input[i]);
      }
    }
    if (objectsWithoutScene.length > 0) {
      await this.processObjectsAsync(objectsWithoutScene);
    }
    for (let i = 0; i < this.skins.length; ++i) {
      this.processSkin(this.skins[i]);
    }
    for (let i = 0; i < options.animations.length; ++i) {
      this.processAnimation(options.animations[i], input[0]);
    }
    await this._invokeAllAsync(function(ext) {
      ext.afterParse && ext.afterParse(input);
    });
  }
  async _invokeAllAsync(func) {
    for (let i = 0, il = this.plugins.length; i < il; i++) {
      await func(this.plugins[i]);
    }
  }
}
class GLTFLightExtension {
  static {
    __name(this, "GLTFLightExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_lights_punctual";
  }
  writeNode(light, nodeDef) {
    if (!light.isLight) return;
    if (!light.isDirectionalLight && !light.isPointLight && !light.isSpotLight) {
      console.warn("THREE.GLTFExporter: Only directional, point, and spot lights are supported.", light);
      return;
    }
    const writer = this.writer;
    const json = writer.json;
    const extensionsUsed = writer.extensionsUsed;
    const lightDef = {};
    if (light.name) lightDef.name = light.name;
    lightDef.color = light.color.toArray();
    lightDef.intensity = light.intensity;
    if (light.isDirectionalLight) {
      lightDef.type = "directional";
    } else if (light.isPointLight) {
      lightDef.type = "point";
      if (light.distance > 0) lightDef.range = light.distance;
    } else if (light.isSpotLight) {
      lightDef.type = "spot";
      if (light.distance > 0) lightDef.range = light.distance;
      lightDef.spot = {};
      lightDef.spot.innerConeAngle = (1 - light.penumbra) * light.angle;
      lightDef.spot.outerConeAngle = light.angle;
    }
    if (light.decay !== void 0 && light.decay !== 2) {
      console.warn("THREE.GLTFExporter: Light decay may be lost. glTF is physically-based, and expects light.decay=2.");
    }
    if (light.target && (light.target.parent !== light || light.target.position.x !== 0 || light.target.position.y !== 0 || light.target.position.z !== -1)) {
      console.warn("THREE.GLTFExporter: Light direction may be lost. For best results, make light.target a child of the light with position 0,0,-1.");
    }
    if (!extensionsUsed[this.name]) {
      json.extensions = json.extensions || {};
      json.extensions[this.name] = { lights: [] };
      extensionsUsed[this.name] = true;
    }
    const lights = json.extensions[this.name].lights;
    lights.push(lightDef);
    nodeDef.extensions = nodeDef.extensions || {};
    nodeDef.extensions[this.name] = { light: lights.length - 1 };
  }
}
class GLTFMaterialsUnlitExtension2 {
  static {
    __name(this, "GLTFMaterialsUnlitExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_unlit";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshBasicMaterial) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = {};
    extensionsUsed[this.name] = true;
    materialDef.pbrMetallicRoughness.metallicFactor = 0;
    materialDef.pbrMetallicRoughness.roughnessFactor = 0.9;
  }
}
class GLTFMaterialsClearcoatExtension2 {
  static {
    __name(this, "GLTFMaterialsClearcoatExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_clearcoat";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshPhysicalMaterial || material.clearcoat === 0) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    extensionDef.clearcoatFactor = material.clearcoat;
    if (material.clearcoatMap) {
      const clearcoatMapDef = {
        index: await writer.processTextureAsync(material.clearcoatMap),
        texCoord: material.clearcoatMap.channel
      };
      writer.applyTextureTransform(clearcoatMapDef, material.clearcoatMap);
      extensionDef.clearcoatTexture = clearcoatMapDef;
    }
    extensionDef.clearcoatRoughnessFactor = material.clearcoatRoughness;
    if (material.clearcoatRoughnessMap) {
      const clearcoatRoughnessMapDef = {
        index: await writer.processTextureAsync(material.clearcoatRoughnessMap),
        texCoord: material.clearcoatRoughnessMap.channel
      };
      writer.applyTextureTransform(clearcoatRoughnessMapDef, material.clearcoatRoughnessMap);
      extensionDef.clearcoatRoughnessTexture = clearcoatRoughnessMapDef;
    }
    if (material.clearcoatNormalMap) {
      const clearcoatNormalMapDef = {
        index: await writer.processTextureAsync(material.clearcoatNormalMap),
        texCoord: material.clearcoatNormalMap.channel
      };
      if (material.clearcoatNormalScale.x !== 1) clearcoatNormalMapDef.scale = material.clearcoatNormalScale.x;
      writer.applyTextureTransform(clearcoatNormalMapDef, material.clearcoatNormalMap);
      extensionDef.clearcoatNormalTexture = clearcoatNormalMapDef;
    }
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMaterialsDispersionExtension2 {
  static {
    __name(this, "GLTFMaterialsDispersionExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_dispersion";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshPhysicalMaterial || material.dispersion === 0) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    extensionDef.dispersion = material.dispersion;
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMaterialsIridescenceExtension2 {
  static {
    __name(this, "GLTFMaterialsIridescenceExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_iridescence";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshPhysicalMaterial || material.iridescence === 0) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    extensionDef.iridescenceFactor = material.iridescence;
    if (material.iridescenceMap) {
      const iridescenceMapDef = {
        index: await writer.processTextureAsync(material.iridescenceMap),
        texCoord: material.iridescenceMap.channel
      };
      writer.applyTextureTransform(iridescenceMapDef, material.iridescenceMap);
      extensionDef.iridescenceTexture = iridescenceMapDef;
    }
    extensionDef.iridescenceIor = material.iridescenceIOR;
    extensionDef.iridescenceThicknessMinimum = material.iridescenceThicknessRange[0];
    extensionDef.iridescenceThicknessMaximum = material.iridescenceThicknessRange[1];
    if (material.iridescenceThicknessMap) {
      const iridescenceThicknessMapDef = {
        index: await writer.processTextureAsync(material.iridescenceThicknessMap),
        texCoord: material.iridescenceThicknessMap.channel
      };
      writer.applyTextureTransform(iridescenceThicknessMapDef, material.iridescenceThicknessMap);
      extensionDef.iridescenceThicknessTexture = iridescenceThicknessMapDef;
    }
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMaterialsTransmissionExtension2 {
  static {
    __name(this, "GLTFMaterialsTransmissionExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_transmission";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshPhysicalMaterial || material.transmission === 0) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    extensionDef.transmissionFactor = material.transmission;
    if (material.transmissionMap) {
      const transmissionMapDef = {
        index: await writer.processTextureAsync(material.transmissionMap),
        texCoord: material.transmissionMap.channel
      };
      writer.applyTextureTransform(transmissionMapDef, material.transmissionMap);
      extensionDef.transmissionTexture = transmissionMapDef;
    }
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMaterialsVolumeExtension2 {
  static {
    __name(this, "GLTFMaterialsVolumeExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_volume";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshPhysicalMaterial || material.transmission === 0) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    extensionDef.thicknessFactor = material.thickness;
    if (material.thicknessMap) {
      const thicknessMapDef = {
        index: await writer.processTextureAsync(material.thicknessMap),
        texCoord: material.thicknessMap.channel
      };
      writer.applyTextureTransform(thicknessMapDef, material.thicknessMap);
      extensionDef.thicknessTexture = thicknessMapDef;
    }
    if (material.attenuationDistance !== Infinity) {
      extensionDef.attenuationDistance = material.attenuationDistance;
    }
    extensionDef.attenuationColor = material.attenuationColor.toArray();
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMaterialsIorExtension2 {
  static {
    __name(this, "GLTFMaterialsIorExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_ior";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshPhysicalMaterial || material.ior === 1.5) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    extensionDef.ior = material.ior;
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMaterialsSpecularExtension2 {
  static {
    __name(this, "GLTFMaterialsSpecularExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_specular";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshPhysicalMaterial || material.specularIntensity === 1 && material.specularColor.equals(DEFAULT_SPECULAR_COLOR) && !material.specularIntensityMap && !material.specularColorMap) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    if (material.specularIntensityMap) {
      const specularIntensityMapDef = {
        index: await writer.processTextureAsync(material.specularIntensityMap),
        texCoord: material.specularIntensityMap.channel
      };
      writer.applyTextureTransform(specularIntensityMapDef, material.specularIntensityMap);
      extensionDef.specularTexture = specularIntensityMapDef;
    }
    if (material.specularColorMap) {
      const specularColorMapDef = {
        index: await writer.processTextureAsync(material.specularColorMap),
        texCoord: material.specularColorMap.channel
      };
      writer.applyTextureTransform(specularColorMapDef, material.specularColorMap);
      extensionDef.specularColorTexture = specularColorMapDef;
    }
    extensionDef.specularFactor = material.specularIntensity;
    extensionDef.specularColorFactor = material.specularColor.toArray();
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMaterialsSheenExtension2 {
  static {
    __name(this, "GLTFMaterialsSheenExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_sheen";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshPhysicalMaterial || material.sheen == 0) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    if (material.sheenRoughnessMap) {
      const sheenRoughnessMapDef = {
        index: await writer.processTextureAsync(material.sheenRoughnessMap),
        texCoord: material.sheenRoughnessMap.channel
      };
      writer.applyTextureTransform(sheenRoughnessMapDef, material.sheenRoughnessMap);
      extensionDef.sheenRoughnessTexture = sheenRoughnessMapDef;
    }
    if (material.sheenColorMap) {
      const sheenColorMapDef = {
        index: await writer.processTextureAsync(material.sheenColorMap),
        texCoord: material.sheenColorMap.channel
      };
      writer.applyTextureTransform(sheenColorMapDef, material.sheenColorMap);
      extensionDef.sheenColorTexture = sheenColorMapDef;
    }
    extensionDef.sheenRoughnessFactor = material.sheenRoughness;
    extensionDef.sheenColorFactor = material.sheenColor.toArray();
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMaterialsAnisotropyExtension2 {
  static {
    __name(this, "GLTFMaterialsAnisotropyExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_anisotropy";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshPhysicalMaterial || material.anisotropy == 0) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    if (material.anisotropyMap) {
      const anisotropyMapDef = { index: await writer.processTextureAsync(material.anisotropyMap) };
      writer.applyTextureTransform(anisotropyMapDef, material.anisotropyMap);
      extensionDef.anisotropyTexture = anisotropyMapDef;
    }
    extensionDef.anisotropyStrength = material.anisotropy;
    extensionDef.anisotropyRotation = material.anisotropyRotation;
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMaterialsEmissiveStrengthExtension2 {
  static {
    __name(this, "GLTFMaterialsEmissiveStrengthExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "KHR_materials_emissive_strength";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshStandardMaterial || material.emissiveIntensity === 1) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    extensionDef.emissiveStrength = material.emissiveIntensity;
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMaterialsBumpExtension2 {
  static {
    __name(this, "GLTFMaterialsBumpExtension");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "EXT_materials_bump";
  }
  async writeMaterialAsync(material, materialDef) {
    if (!material.isMeshStandardMaterial || material.bumpScale === 1 && !material.bumpMap) return;
    const writer = this.writer;
    const extensionsUsed = writer.extensionsUsed;
    const extensionDef = {};
    if (material.bumpMap) {
      const bumpMapDef = {
        index: await writer.processTextureAsync(material.bumpMap),
        texCoord: material.bumpMap.channel
      };
      writer.applyTextureTransform(bumpMapDef, material.bumpMap);
      extensionDef.bumpTexture = bumpMapDef;
    }
    extensionDef.bumpFactor = material.bumpScale;
    materialDef.extensions = materialDef.extensions || {};
    materialDef.extensions[this.name] = extensionDef;
    extensionsUsed[this.name] = true;
  }
}
class GLTFMeshGpuInstancing2 {
  static {
    __name(this, "GLTFMeshGpuInstancing");
  }
  constructor(writer) {
    this.writer = writer;
    this.name = "EXT_mesh_gpu_instancing";
  }
  writeNode(object, nodeDef) {
    if (!object.isInstancedMesh) return;
    const writer = this.writer;
    const mesh = object;
    const translationAttr = new Float32Array(mesh.count * 3);
    const rotationAttr = new Float32Array(mesh.count * 4);
    const scaleAttr = new Float32Array(mesh.count * 3);
    const matrix = new Matrix4();
    const position = new Vector3();
    const quaternion = new Quaternion();
    const scale = new Vector3();
    for (let i = 0; i < mesh.count; i++) {
      mesh.getMatrixAt(i, matrix);
      matrix.decompose(position, quaternion, scale);
      position.toArray(translationAttr, i * 3);
      quaternion.toArray(rotationAttr, i * 4);
      scale.toArray(scaleAttr, i * 3);
    }
    const attributes = {
      TRANSLATION: writer.processAccessor(new BufferAttribute(translationAttr, 3)),
      ROTATION: writer.processAccessor(new BufferAttribute(rotationAttr, 4)),
      SCALE: writer.processAccessor(new BufferAttribute(scaleAttr, 3))
    };
    if (mesh.instanceColor)
      attributes._COLOR_0 = writer.processAccessor(mesh.instanceColor);
    nodeDef.extensions = nodeDef.extensions || {};
    nodeDef.extensions[this.name] = { attributes };
    writer.extensionsUsed[this.name] = true;
    writer.extensionsRequired[this.name] = true;
  }
}
GLTFExporter.Utils = {
  insertKeyframe: /* @__PURE__ */ __name(function(track, time) {
    const tolerance = 1e-3;
    const valueSize = track.getValueSize();
    const times = new track.TimeBufferType(track.times.length + 1);
    const values = new track.ValueBufferType(track.values.length + valueSize);
    const interpolant = track.createInterpolant(new track.ValueBufferType(valueSize));
    let index;
    if (track.times.length === 0) {
      times[0] = time;
      for (let i = 0; i < valueSize; i++) {
        values[i] = 0;
      }
      index = 0;
    } else if (time < track.times[0]) {
      if (Math.abs(track.times[0] - time) < tolerance) return 0;
      times[0] = time;
      times.set(track.times, 1);
      values.set(interpolant.evaluate(time), 0);
      values.set(track.values, valueSize);
      index = 0;
    } else if (time > track.times[track.times.length - 1]) {
      if (Math.abs(track.times[track.times.length - 1] - time) < tolerance) {
        return track.times.length - 1;
      }
      times[times.length - 1] = time;
      times.set(track.times, 0);
      values.set(track.values, 0);
      values.set(interpolant.evaluate(time), track.values.length);
      index = times.length - 1;
    } else {
      for (let i = 0; i < track.times.length; i++) {
        if (Math.abs(track.times[i] - time) < tolerance) return i;
        if (track.times[i] < time && track.times[i + 1] > time) {
          times.set(track.times.slice(0, i + 1), 0);
          times[i + 1] = time;
          times.set(track.times.slice(i + 1), i + 2);
          values.set(track.values.slice(0, (i + 1) * valueSize), 0);
          values.set(interpolant.evaluate(time), (i + 1) * valueSize);
          values.set(track.values.slice((i + 1) * valueSize), (i + 2) * valueSize);
          index = i + 1;
          break;
        }
      }
    }
    track.times = times;
    track.values = values;
    return index;
  }, "insertKeyframe"),
  mergeMorphTargetTracks: /* @__PURE__ */ __name(function(clip, root) {
    const tracks = [];
    const mergedTracks = {};
    const sourceTracks = clip.tracks;
    for (let i = 0; i < sourceTracks.length; ++i) {
      let sourceTrack = sourceTracks[i];
      const sourceTrackBinding = PropertyBinding.parseTrackName(sourceTrack.name);
      const sourceTrackNode = PropertyBinding.findNode(root, sourceTrackBinding.nodeName);
      if (sourceTrackBinding.propertyName !== "morphTargetInfluences" || sourceTrackBinding.propertyIndex === void 0) {
        tracks.push(sourceTrack);
        continue;
      }
      if (sourceTrack.createInterpolant !== sourceTrack.InterpolantFactoryMethodDiscrete && sourceTrack.createInterpolant !== sourceTrack.InterpolantFactoryMethodLinear) {
        if (sourceTrack.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline) {
          throw new Error("THREE.GLTFExporter: Cannot merge tracks with glTF CUBICSPLINE interpolation.");
        }
        console.warn("THREE.GLTFExporter: Morph target interpolation mode not yet supported. Using LINEAR instead.");
        sourceTrack = sourceTrack.clone();
        sourceTrack.setInterpolation(InterpolateLinear);
      }
      const targetCount = sourceTrackNode.morphTargetInfluences.length;
      const targetIndex = sourceTrackNode.morphTargetDictionary[sourceTrackBinding.propertyIndex];
      if (targetIndex === void 0) {
        throw new Error("THREE.GLTFExporter: Morph target name not found: " + sourceTrackBinding.propertyIndex);
      }
      let mergedTrack;
      if (mergedTracks[sourceTrackNode.uuid] === void 0) {
        mergedTrack = sourceTrack.clone();
        const values = new mergedTrack.ValueBufferType(targetCount * mergedTrack.times.length);
        for (let j = 0; j < mergedTrack.times.length; j++) {
          values[j * targetCount + targetIndex] = mergedTrack.values[j];
        }
        mergedTrack.name = (sourceTrackBinding.nodeName || "") + ".morphTargetInfluences";
        mergedTrack.values = values;
        mergedTracks[sourceTrackNode.uuid] = mergedTrack;
        tracks.push(mergedTrack);
        continue;
      }
      const sourceInterpolant = sourceTrack.createInterpolant(new sourceTrack.ValueBufferType(1));
      mergedTrack = mergedTracks[sourceTrackNode.uuid];
      for (let j = 0; j < mergedTrack.times.length; j++) {
        mergedTrack.values[j * targetCount + targetIndex] = sourceInterpolant.evaluate(mergedTrack.times[j]);
      }
      for (let j = 0; j < sourceTrack.times.length; j++) {
        const keyframeIndex = this.insertKeyframe(mergedTrack, sourceTrack.times[j]);
        mergedTrack.values[keyframeIndex * targetCount + targetIndex] = sourceTrack.values[j];
      }
    }
    clip.tracks = tracks;
    return clip;
  }, "mergeMorphTargetTracks"),
  toFloat32BufferAttribute: /* @__PURE__ */ __name(function(srcAttribute) {
    const dstAttribute = new BufferAttribute(new Float32Array(srcAttribute.count * srcAttribute.itemSize), srcAttribute.itemSize, false);
    if (!srcAttribute.normalized && !srcAttribute.isInterleavedBufferAttribute) {
      dstAttribute.array.set(srcAttribute.array);
      return dstAttribute;
    }
    for (let i = 0, il = srcAttribute.count; i < il; i++) {
      for (let j = 0; j < srcAttribute.itemSize; j++) {
        dstAttribute.setComponent(i, j, srcAttribute.getComponent(i, j));
      }
    }
    return dstAttribute;
  }, "toFloat32BufferAttribute")
};
class OBJExporter {
  static {
    __name(this, "OBJExporter");
  }
  parse(object) {
    let output = "";
    let indexVertex = 0;
    let indexVertexUvs = 0;
    let indexNormals = 0;
    const vertex2 = new Vector3();
    const color = new Color();
    const normal = new Vector3();
    const uv = new Vector2();
    const face = [];
    function parseMesh(mesh) {
      let nbVertex = 0;
      let nbNormals = 0;
      let nbVertexUvs = 0;
      const geometry = mesh.geometry;
      const normalMatrixWorld = new Matrix3();
      const vertices = geometry.getAttribute("position");
      const normals = geometry.getAttribute("normal");
      const uvs = geometry.getAttribute("uv");
      const indices = geometry.getIndex();
      output += "o " + mesh.name + "\n";
      if (mesh.material && mesh.material.name) {
        output += "usemtl " + mesh.material.name + "\n";
      }
      if (vertices !== void 0) {
        for (let i = 0, l = vertices.count; i < l; i++, nbVertex++) {
          vertex2.fromBufferAttribute(vertices, i);
          vertex2.applyMatrix4(mesh.matrixWorld);
          output += "v " + vertex2.x + " " + vertex2.y + " " + vertex2.z + "\n";
        }
      }
      if (uvs !== void 0) {
        for (let i = 0, l = uvs.count; i < l; i++, nbVertexUvs++) {
          uv.fromBufferAttribute(uvs, i);
          output += "vt " + uv.x + " " + uv.y + "\n";
        }
      }
      if (normals !== void 0) {
        normalMatrixWorld.getNormalMatrix(mesh.matrixWorld);
        for (let i = 0, l = normals.count; i < l; i++, nbNormals++) {
          normal.fromBufferAttribute(normals, i);
          normal.applyMatrix3(normalMatrixWorld).normalize();
          output += "vn " + normal.x + " " + normal.y + " " + normal.z + "\n";
        }
      }
      if (indices !== null) {
        for (let i = 0, l = indices.count; i < l; i += 3) {
          for (let m = 0; m < 3; m++) {
            const j = indices.getX(i + m) + 1;
            face[m] = indexVertex + j + (normals || uvs ? "/" + (uvs ? indexVertexUvs + j : "") + (normals ? "/" + (indexNormals + j) : "") : "");
          }
          output += "f " + face.join(" ") + "\n";
        }
      } else {
        for (let i = 0, l = vertices.count; i < l; i += 3) {
          for (let m = 0; m < 3; m++) {
            const j = i + m + 1;
            face[m] = indexVertex + j + (normals || uvs ? "/" + (uvs ? indexVertexUvs + j : "") + (normals ? "/" + (indexNormals + j) : "") : "");
          }
          output += "f " + face.join(" ") + "\n";
        }
      }
      indexVertex += nbVertex;
      indexVertexUvs += nbVertexUvs;
      indexNormals += nbNormals;
    }
    __name(parseMesh, "parseMesh");
    function parseLine(line) {
      let nbVertex = 0;
      const geometry = line.geometry;
      const type = line.type;
      const vertices = geometry.getAttribute("position");
      output += "o " + line.name + "\n";
      if (vertices !== void 0) {
        for (let i = 0, l = vertices.count; i < l; i++, nbVertex++) {
          vertex2.fromBufferAttribute(vertices, i);
          vertex2.applyMatrix4(line.matrixWorld);
          output += "v " + vertex2.x + " " + vertex2.y + " " + vertex2.z + "\n";
        }
      }
      if (type === "Line") {
        output += "l ";
        for (let j = 1, l = vertices.count; j <= l; j++) {
          output += indexVertex + j + " ";
        }
        output += "\n";
      }
      if (type === "LineSegments") {
        for (let j = 1, k = j + 1, l = vertices.count; j < l; j += 2, k = j + 1) {
          output += "l " + (indexVertex + j) + " " + (indexVertex + k) + "\n";
        }
      }
      indexVertex += nbVertex;
    }
    __name(parseLine, "parseLine");
    function parsePoints(points) {
      let nbVertex = 0;
      const geometry = points.geometry;
      const vertices = geometry.getAttribute("position");
      const colors = geometry.getAttribute("color");
      output += "o " + points.name + "\n";
      if (vertices !== void 0) {
        for (let i = 0, l = vertices.count; i < l; i++, nbVertex++) {
          vertex2.fromBufferAttribute(vertices, i);
          vertex2.applyMatrix4(points.matrixWorld);
          output += "v " + vertex2.x + " " + vertex2.y + " " + vertex2.z;
          if (colors !== void 0) {
            color.fromBufferAttribute(colors, i);
            ColorManagement.fromWorkingColorSpace(color, SRGBColorSpace);
            output += " " + color.r + " " + color.g + " " + color.b;
          }
          output += "\n";
        }
        output += "p ";
        for (let j = 1, l = vertices.count; j <= l; j++) {
          output += indexVertex + j + " ";
        }
        output += "\n";
      }
      indexVertex += nbVertex;
    }
    __name(parsePoints, "parsePoints");
    object.traverse(function(child) {
      if (child.isMesh === true) {
        parseMesh(child);
      }
      if (child.isLine === true) {
        parseLine(child);
      }
      if (child.isPoints === true) {
        parsePoints(child);
      }
    });
    return output;
  }
}
class STLExporter {
  static {
    __name(this, "STLExporter");
  }
  parse(scene, options = {}) {
    options = Object.assign({
      binary: false
    }, options);
    const binary = options.binary;
    const objects = [];
    let triangles = 0;
    scene.traverse(function(object) {
      if (object.isMesh) {
        const geometry = object.geometry;
        const index = geometry.index;
        const positionAttribute = geometry.getAttribute("position");
        triangles += index !== null ? index.count / 3 : positionAttribute.count / 3;
        objects.push({
          object3d: object,
          geometry
        });
      }
    });
    let output;
    let offset = 80;
    if (binary === true) {
      const bufferLength = triangles * 2 + triangles * 3 * 4 * 4 + 80 + 4;
      const arrayBuffer = new ArrayBuffer(bufferLength);
      output = new DataView(arrayBuffer);
      output.setUint32(offset, triangles, true);
      offset += 4;
    } else {
      output = "";
      output += "solid exported\n";
    }
    const vA = new Vector3();
    const vB = new Vector3();
    const vC = new Vector3();
    const cb = new Vector3();
    const ab = new Vector3();
    const normal = new Vector3();
    for (let i = 0, il = objects.length; i < il; i++) {
      const object = objects[i].object3d;
      const geometry = objects[i].geometry;
      const index = geometry.index;
      const positionAttribute = geometry.getAttribute("position");
      if (index !== null) {
        for (let j = 0; j < index.count; j += 3) {
          const a = index.getX(j + 0);
          const b = index.getX(j + 1);
          const c = index.getX(j + 2);
          writeFace(a, b, c, positionAttribute, object);
        }
      } else {
        for (let j = 0; j < positionAttribute.count; j += 3) {
          const a = j + 0;
          const b = j + 1;
          const c = j + 2;
          writeFace(a, b, c, positionAttribute, object);
        }
      }
    }
    if (binary === false) {
      output += "endsolid exported\n";
    }
    return output;
    function writeFace(a, b, c, positionAttribute, object) {
      vA.fromBufferAttribute(positionAttribute, a);
      vB.fromBufferAttribute(positionAttribute, b);
      vC.fromBufferAttribute(positionAttribute, c);
      if (object.isSkinnedMesh === true) {
        object.applyBoneTransform(a, vA);
        object.applyBoneTransform(b, vB);
        object.applyBoneTransform(c, vC);
      }
      vA.applyMatrix4(object.matrixWorld);
      vB.applyMatrix4(object.matrixWorld);
      vC.applyMatrix4(object.matrixWorld);
      writeNormal(vA, vB, vC);
      writeVertex(vA);
      writeVertex(vB);
      writeVertex(vC);
      if (binary === true) {
        output.setUint16(offset, 0, true);
        offset += 2;
      } else {
        output += "		endloop\n";
        output += "	endfacet\n";
      }
    }
    __name(writeFace, "writeFace");
    function writeNormal(vA2, vB2, vC2) {
      cb.subVectors(vC2, vB2);
      ab.subVectors(vA2, vB2);
      cb.cross(ab).normalize();
      normal.copy(cb).normalize();
      if (binary === true) {
        output.setFloat32(offset, normal.x, true);
        offset += 4;
        output.setFloat32(offset, normal.y, true);
        offset += 4;
        output.setFloat32(offset, normal.z, true);
        offset += 4;
      } else {
        output += "	facet normal " + normal.x + " " + normal.y + " " + normal.z + "\n";
        output += "		outer loop\n";
      }
    }
    __name(writeNormal, "writeNormal");
    function writeVertex(vertex2) {
      if (binary === true) {
        output.setFloat32(offset, vertex2.x, true);
        offset += 4;
        output.setFloat32(offset, vertex2.y, true);
        offset += 4;
        output.setFloat32(offset, vertex2.z, true);
        offset += 4;
      } else {
        output += "			vertex " + vertex2.x + " " + vertex2.y + " " + vertex2.z + "\n";
      }
    }
    __name(writeVertex, "writeVertex");
  }
}
export {
  AnimationMixer as A,
  BufferGeometry as B,
  Color as C,
  DirectionalLight as D,
  EquirectangularReflectionMapping as E,
  FBXLoader as F,
  GLTFLoader as G,
  Vector2 as H,
  MeshDepthMaterial as I,
  BasicDepthPacking as J,
  Box3 as K,
  LoopRepeat as L,
  MTLLoader as M,
  NoToneMapping as N,
  OrthographicCamera as O,
  PerspectiveCamera as P,
  LinearSRGBColorSpace as Q,
  Light as R,
  STLLoader as S,
  TextureLoader as T,
  Camera as U,
  Vector3 as V,
  ViewHelper as W,
  Clock as X,
  WebGLRenderer as Y,
  OrbitControls as a,
  AmbientLight as b,
  BufferAttribute as c,
  OBJLoader as d,
  PLYLoader as e,
  Mesh as f,
  SkinnedMesh as g,
  Group as h,
  SplatMesh as i,
  PointsMaterial as j,
  Points as k,
  MeshStandardMaterial as l,
  DoubleSide as m,
  GLTFExporter as n,
  OBJExporter as o,
  STLExporter as p,
  SpriteMaterial as q,
  Sprite as r,
  Scene as s,
  GridHelper as t,
  PlaneGeometry as u,
  MeshBasicMaterial as v,
  Material as w,
  Texture as x,
  SRGBColorSpace as y,
  MeshNormalMaterial as z
};
//# sourceMappingURL=vendor-three-_gcZkhit.js.map
