three-stdlib
Version:
stand-alone library of threejs examples
1,374 lines • 99.7 kB
JavaScript
"use strict";
Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
const THREE = require("three");
const BufferGeometryUtils = require("../utils/BufferGeometryUtils.cjs");
const constants = require("../_polyfill/constants.cjs");
const LoaderUtils = require("../_polyfill/LoaderUtils.cjs");
const SRGBColorSpace = "srgb";
const LinearSRGBColorSpace = "srgb-linear";
const sRGBEncoding = 3001;
const LinearEncoding = 3e3;
class GLTFLoader extends THREE.Loader {
constructor(manager) {
super(manager);
this.dracoLoader = null;
this.ktx2Loader = null;
this.meshoptDecoder = null;
this.pluginCallbacks = [];
this.register(function(parser) {
return new GLTFMaterialsClearcoatExtension(parser);
});
this.register(function(parser) {
return new GLTFMaterialsDispersionExtension(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(parser);
});
this.register(function(parser) {
return new GLTFMaterialsTransmissionExtension(parser);
});
this.register(function(parser) {
return new GLTFMaterialsVolumeExtension(parser);
});
this.register(function(parser) {
return new GLTFMaterialsIorExtension(parser);
});
this.register(function(parser) {
return new GLTFMaterialsEmissiveStrengthExtension(parser);
});
this.register(function(parser) {
return new GLTFMaterialsSpecularExtension(parser);
});
this.register(function(parser) {
return new GLTFMaterialsIridescenceExtension(parser);
});
this.register(function(parser) {
return new GLTFMaterialsAnisotropyExtension(parser);
});
this.register(function(parser) {
return new GLTFMaterialsBumpExtension(parser);
});
this.register(function(parser) {
return new GLTFLightsExtension(parser);
});
this.register(function(parser) {
return new GLTFMeshoptCompression(parser);
});
this.register(function(parser) {
return new GLTFMeshGpuInstancing(parser);
});
}
load(url, onLoad, onProgress, onError) {
const scope = this;
let resourcePath;
if (this.resourcePath !== "") {
resourcePath = this.resourcePath;
} else if (this.path !== "") {
const relativeUrl = THREE.LoaderUtils.extractUrlBase(url);
resourcePath = THREE.LoaderUtils.resolveURL(relativeUrl, this.path);
} else {
resourcePath = THREE.LoaderUtils.extractUrlBase(url);
}
this.manager.itemStart(url);
const _onError = function(e) {
if (onError) {
onError(e);
} else {
console.error(e);
}
scope.manager.itemError(url);
scope.manager.itemEnd(url);
};
const loader = new THREE.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;
}
setDDSLoader() {
throw new Error('THREE.GLTFLoader: "MSFT_texture_dds" no longer supported. Please update to "KHR_texture_basisu".');
}
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 = {};
if (typeof data === "string") {
json = JSON.parse(data);
} else if (data instanceof ArrayBuffer) {
const magic = LoaderUtils.decodeText(new Uint8Array(data.slice(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(LoaderUtils.decodeText(new Uint8Array(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();
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: function(key) {
return objects[key];
},
add: function(key, object) {
objects[key] = object;
},
remove: function(key) {
delete objects[key];
},
removeAll: function() {
objects = {};
}
};
}
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 {
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 THREE.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 THREE.DirectionalLight(color);
lightNode.target.position.set(0, 0, -1);
lightNode.add(lightNode.target);
break;
case "point":
lightNode = new THREE.PointLight(color);
lightNode.distance = range;
break;
case "spot":
lightNode = new THREE.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);
});
}
}
class GLTFMaterialsUnlitExtension {
constructor() {
this.name = EXTENSIONS.KHR_MATERIALS_UNLIT;
}
getMaterialType() {
return THREE.MeshBasicMaterial;
}
extendParams(materialParams, materialDef, parser) {
const pending = [];
materialParams.color = new THREE.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);
}
}
class 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();
}
}
class 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 THREE.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 THREE.Vector2(scale, scale);
}
}
return Promise.all(pending);
}
}
class 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 THREE.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();
}
}
class 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 THREE.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);
}
}
class 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 THREE.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 THREE.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);
}
}
class 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 THREE.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);
}
}
class 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 THREE.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 THREE.Color().setRGB(
colorArray[0],
colorArray[1],
colorArray[2],
LinearSRGBColorSpace
);
return Promise.all(pending);
}
}
class 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 THREE.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();
}
}
class 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 THREE.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 THREE.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);
}
}
class 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 THREE.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);
}
}
class 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 THREE.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 {
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 {
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 {
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 {
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;
}
}
}
class 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.TRIANGLES && primitive.mode !== WEBGL_CONSTANTS.TRIANGLE_STRIP && primitive.mode !== WEBGL_CONSTANTS.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 THREE.Matrix4();
const p = new THREE.Vector3();
const q = new THREE.Quaternion();
const s = new THREE.Vector3(1, 1, 1);
const instancedMesh = new THREE.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 THREE.InstancedBufferAttribute(attr.array, attr.itemSize, attr.normalized);
} else if (attributeName !== "TRANSLATION" && attributeName !== "ROTATION" && attributeName !== "SCALE") {
mesh.geometry.setAttribute(attributeName, attributes[attributeName]);
}
}
THREE.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 {
constructor(data) {
this.name = EXTENSIONS.KHR_BINARY_GLTF;
this.content = null;
this.body = null;
const headerView = new DataView(data, 0, BINARY_EXTENSION_HEADER_LENGTH);
this.header = {
magic: LoaderUtils.decodeText(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 = LoaderUtils.decodeText(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 {
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 {
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 {
constructor() {
this.name = EXTENSIONS.KHR_MESH_QUANTIZATION;
}
}
class GLTFCubicSplineInterpolant extends THREE.Interpolant {
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 td = t1 - t0;
const p = (t - t0) / td;
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] * td;
const p1 = values[offset1 + i + stride];
const m1 = values[offset1 + i] * td;
result[i] = s0 * p0 + s1 * m0 + s2 * p1 + s3 * m1;
}
return result;
}
}
const _q = /* @__PURE__ */ new THREE.Quaternion();
class GLTFCubicSplineQuaternionInterpolant extends GLTFCubicSplineInterpolant {
interpolate_(i1, t0, t, t1) {
const result = super.interpolate_(i1, t0, t, t1);
_q.fromArray(result).normalize().toArray(result);
return result;
}
}
const WEBGL_CONSTANTS = {
FLOAT: 5126,
//FLOAT_MAT2: 35674,
FLOAT_MAT3: 35675,
FLOAT_MAT4: 35676,
FLOAT_VEC2: 35664,
FLOAT_VEC3: 35665,
FLOAT_VEC4: 35666,
LINEAR: 9729,
REPEAT: 10497,
SAMPLER_2D: 35678,
POINTS: 0,
LINES: 1,
LINE_LOOP: 2,
LINE_STRIP: 3,
TRIANGLES: 4,
TRIANGLE_STRIP: 5,
TRIANGLE_FAN: 6,
UNSIGNED_BYTE: 5121,
UNSIGNED_SHORT: 5123
};
const WEBGL_COMPONENT_TYPES = {
5120: Int8Array,
5121: Uint8Array,
5122: Int16Array,
5123: Uint16Array,
5125: Uint32Array,
5126: Float32Array
};
const WEBGL_FILTERS = {
9728: THREE.NearestFilter,
9729: THREE.LinearFilter,
9984: THREE.NearestMipmapNearestFilter,
9985: THREE.LinearMipmapNearestFilter,
9986: THREE.NearestMipmapLinearFilter,
9987: THREE.LinearMipmapLinearFilter
};
const WEBGL_WRAPPINGS = {
33071: THREE.ClampToEdgeWrapping,
33648: THREE.MirroredRepeatWrapping,
10497: THREE.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",
// uv => uv1, 4 uv channels
// https://github.com/mrdoob/three.js/pull/25943
// https://github.com/mrdoob/three.js/pull/25788
...constants.version >= 152 ? {
TEXCOORD_0: "uv",
TEXCOORD_1: "uv1",
TEXCOORD_2: "uv2",
TEXCOORD_3: "uv3"
} : {
TEXCOORD_0: "uv",
TEXCOORD_1: "uv2"
},
COLOR_0: "color",
WEIGHTS_0: "skinWeight",
JOINTS_0: "skinIndex"
};
const PATH_PROPERTIES = {
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: THREE.InterpolateLinear,
STEP: THREE.InterpolateDiscrete
};
const ALPHA_MODES = {
OPAQUE: "OPAQUE",
MASK: "MASK",
BLEND: "BLEND"
};
function createDefaultMaterial(cache) {
if (cache["DefaultMaterial"] === void 0) {
cache["DefaultMaterial"] = new THREE.MeshStandardMaterial({
color: 16777215,
emissive: 0,
metalness: 1,
roughness: 1,
transparent: false,
depthTest: true,
side: THREE.FrontSide
});
}
return cache["DefaultMaterial"];
}
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];
}
}
}
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);
}
}
}
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;
});
}
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.");
}
}
}
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;
}
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;
}
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.");
}
}
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";
return "image/png";
}
const _identityMatrix = /* @__PURE__ */ new THREE.Matrix4();
class 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 =