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GLTFLoader.js
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import {
AnimationClip,
Bone,
Box3,
BufferAttribute,
BufferGeometry,
CanvasTexture,
ClampToEdgeWrapping,
Color,
DirectionalLight,
DoubleSide,
FileLoader,
FrontSide,
Group,
ImageBitmapLoader,
InterleavedBuffer,
InterleavedBufferAttribute,
Interpolant,
InterpolateDiscrete,
InterpolateLinear,
Line,
LineBasicMaterial,
LineLoop,
LineSegments,
LinearFilter,
LinearMipmapLinearFilter,
LinearMipmapNearestFilter,
Loader,
LoaderUtils,
Material,
MathUtils,
Matrix4,
Mesh,
MeshBasicMaterial,
MeshPhysicalMaterial,
MeshStandardMaterial,
MirroredRepeatWrapping,
NearestFilter,
NearestMipmapLinearFilter,
NearestMipmapNearestFilter,
NumberKeyframeTrack,
Object3D,
OrthographicCamera,
PerspectiveCamera,
PointLight,
Points,
PointsMaterial,
PropertyBinding,
QuaternionKeyframeTrack,
RGBFormat,
RepeatWrapping,
Skeleton,
SkinnedMesh,
Sphere,
SpotLight,
TangentSpaceNormalMap,
TextureLoader,
TriangleFanDrawMode,
TriangleStripDrawMode,
Vector2,
Vector3,
VectorKeyframeTrack,
sRGBEncoding
} from './three.module.js';
class GLTFLoader extends 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 GLTFTextureBasisUExtension( parser );
} );
this.register( function ( parser ) {
return new GLTFTextureWebPExtension( parser );
} );
this.register( function ( parser ) {
return new GLTFMaterialsTransmissionExtension( parser );
} );
this.register( function ( parser ) {
return new GLTFLightsExtension( parser );
} );
this.register( function ( parser ) {
return new GLTFMeshoptCompression( parser );
} );
}
load( url, onLoad, onProgress, onError ) {
const scope = this;
let resourcePath;
if ( this.resourcePath !== '' ) {
resourcePath = this.resourcePath;
} else if ( this.path !== '' ) {
resourcePath = this.path;
} else {
resourcePath = LoaderUtils.extractUrlBase( url );
}
// Tells the LoadingManager to track an extra item, which resolves after
// the model is fully loaded. This means the count of items loaded will
// be incorrect, but ensures manager.onLoad() does not fire early.
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 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 content;
const extensions = {};
const plugins = {};
if ( typeof data === 'string' ) {
content = data;
} else {
const magic = LoaderUtils.decodeText( 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;
}
content = extensions[ EXTENSIONS.KHR_BINARY_GLTF ].content;
} else {
content = LoaderUtils.decodeText( new Uint8Array( data ) );
}
}
const json = JSON.parse( content );
if ( json.asset === undefined || 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 );
plugins[ plugin.name ] = plugin;
// Workaround to avoid determining as unknown extension
// in addUnknownExtensionsToUserData().
// Remove this workaround if we move all the existing
// extension handlers to plugin system
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_MATERIALS_PBR_SPECULAR_GLOSSINESS:
extensions[ extensionName ] = new GLTFMaterialsPbrSpecularGlossinessExtension();
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 ] === undefined ) {
console.warn( 'THREE.GLTFLoader: Unknown extension "' + extensionName + '".' );
}
}
}
}
parser.setExtensions( extensions );
parser.setPlugins( plugins );
parser.parse( onLoad, onError );
}
}
/* GLTFREGISTRY */
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 = {};
}
};
}
/*********************************/
/********** EXTENSIONS ***********/
/*********************************/
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_PBR_SPECULAR_GLOSSINESS: 'KHR_materials_pbrSpecularGlossiness',
KHR_MATERIALS_TRANSMISSION: 'KHR_materials_transmission',
KHR_MATERIALS_UNLIT: 'KHR_materials_unlit',
KHR_TEXTURE_BASISU: 'KHR_texture_basisu',
KHR_TEXTURE_TRANSFORM: 'KHR_texture_transform',
KHR_MESH_QUANTIZATION: 'KHR_mesh_quantization',
EXT_TEXTURE_WEBP: 'EXT_texture_webp',
EXT_MESHOPT_COMPRESSION: 'EXT_meshopt_compression'
};
/**
* Punctual Lights Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual
*/
class GLTFLightsExtension {
constructor( parser ) {
this.parser = parser;
this.name = EXTENSIONS.KHR_LIGHTS_PUNCTUAL;
// Object3D instance caches
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 !== undefined ) {
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( 0xffffff );
if ( lightDef.color !== undefined ) color.fromArray( lightDef.color );
const range = lightDef.range !== undefined ? 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;
// Handle spotlight properties.
lightDef.spot = lightDef.spot || {};
lightDef.spot.innerConeAngle = lightDef.spot.innerConeAngle !== undefined ? lightDef.spot.innerConeAngle : 0;
lightDef.spot.outerConeAngle = lightDef.spot.outerConeAngle !== undefined ? lightDef.spot.outerConeAngle : Math.PI / 4.0;
lightNode.angle = lightDef.spot.outerConeAngle;
lightNode.penumbra = 1.0 - 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 );
}
// Some lights (e.g. spot) default to a position other than the origin. Reset the position
// here, because node-level parsing will only override position if explicitly specified.
lightNode.position.set( 0, 0, 0 );
lightNode.decay = 2;
if ( lightDef.intensity !== undefined ) lightNode.intensity = lightDef.intensity;
lightNode.name = parser.createUniqueName( lightDef.name || ( 'light_' + lightIndex ) );
dependency = Promise.resolve( lightNode );
parser.cache.add( cacheKey, dependency );
return dependency;
}
createNodeAttachment( nodeIndex ) {
const self = 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 === undefined ) return null;
return this._loadLight( lightIndex ).then( function ( light ) {
return parser._getNodeRef( self.cache, lightIndex, light );
} );
}
}
/**
* Unlit Materials Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_unlit
*/
class GLTFMaterialsUnlitExtension {
constructor() {
this.name = EXTENSIONS.KHR_MATERIALS_UNLIT;
}
getMaterialType() {
return MeshBasicMaterial;
}
extendParams( materialParams, materialDef, parser ) {
const pending = [];
materialParams.color = new Color( 1.0, 1.0, 1.0 );
materialParams.opacity = 1.0;
const metallicRoughness = materialDef.pbrMetallicRoughness;
if ( metallicRoughness ) {
if ( Array.isArray( metallicRoughness.baseColorFactor ) ) {
const array = metallicRoughness.baseColorFactor;
materialParams.color.fromArray( array );
materialParams.opacity = array[ 3 ];
}
if ( metallicRoughness.baseColorTexture !== undefined ) {
pending.push( parser.assignTexture( materialParams, 'map', metallicRoughness.baseColorTexture ) );
}
}
return Promise.all( pending );
}
}
/**
* Clearcoat Materials Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_clearcoat
*/
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 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 !== undefined ) {
materialParams.clearcoat = extension.clearcoatFactor;
}
if ( extension.clearcoatTexture !== undefined ) {
pending.push( parser.assignTexture( materialParams, 'clearcoatMap', extension.clearcoatTexture ) );
}
if ( extension.clearcoatRoughnessFactor !== undefined ) {
materialParams.clearcoatRoughness = extension.clearcoatRoughnessFactor;
}
if ( extension.clearcoatRoughnessTexture !== undefined ) {
pending.push( parser.assignTexture( materialParams, 'clearcoatRoughnessMap', extension.clearcoatRoughnessTexture ) );
}
if ( extension.clearcoatNormalTexture !== undefined ) {
pending.push( parser.assignTexture( materialParams, 'clearcoatNormalMap', extension.clearcoatNormalTexture ) );
if ( extension.clearcoatNormalTexture.scale !== undefined ) {
const scale = extension.clearcoatNormalTexture.scale;
// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
materialParams.clearcoatNormalScale = new Vector2( scale, - scale );
}
}
return Promise.all( pending );
}
}
/**
* Transmission Materials Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_transmission
* Draft: https://github.com/KhronosGroup/glTF/pull/1698
*/
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 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 !== undefined ) {
materialParams.transmission = extension.transmissionFactor;
}
if ( extension.transmissionTexture !== undefined ) {
pending.push( parser.assignTexture( materialParams, 'transmissionMap', extension.transmissionTexture ) );
}
return Promise.all( pending );
}
}
/**
* BasisU Texture Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_basisu
*/
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 source = json.images[ extension.source ];
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 {
// Assumes that the extension is optional and that a fallback texture is present
return null;
}
}
return parser.loadTextureImage( textureIndex, source, loader );
}
}
/**
* WebP Texture Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_texture_webp
*/
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, source, loader );
if ( json.extensionsRequired && json.extensionsRequired.indexOf( name ) >= 0 ) {
throw new Error( 'THREE.GLTFLoader: WebP required by asset but unsupported.' );
}
// Fall back to PNG or JPEG.
return parser.loadTexture( textureIndex );
} );
}
detectSupport() {
if ( ! this.isSupported ) {
this.isSupported = new Promise( function ( resolve ) {
const image = new Image();
// Lossy test image. Support for lossy images doesn't guarantee support for all
// WebP images, unfortunately.
image.src = 'data:image/webp;base64,UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA';
image.onload = image.onerror = function () {
resolve( image.height === 1 );
};
} );
}
return this.isSupported;
}
}
/**
* meshopt BufferView Compression Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_meshopt_compression
*/
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 {
// Assumes that the extension is optional and that fallback buffer data is present
return null;
}
}
return Promise.all( [ buffer, decoder.ready ] ).then( function ( res ) {
const byteOffset = extensionDef.byteOffset || 0;
const byteLength = extensionDef.byteLength || 0;
const count = extensionDef.count;
const stride = extensionDef.byteStride;
const result = new ArrayBuffer( count * stride );
const source = new Uint8Array( res[ 0 ], byteOffset, byteLength );
decoder.decodeGltfBuffer( new Uint8Array( result ), count, stride, source, extensionDef.mode, extensionDef.filter );
return result;
} );
} else {
return null;
}
}
}
/* BINARY EXTENSION */
const BINARY_EXTENSION_HEADER_MAGIC = 'glTF';
const BINARY_EXTENSION_HEADER_LENGTH = 12;
const BINARY_EXTENSION_CHUNK_TYPES = { JSON: 0x4E4F534A, BIN: 0x004E4942 };
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 < 2.0 ) {
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 );