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diff --git a/3d/lib/CSS3DRenderer.js b/3d/lib/CSS3DRenderer.js
new file mode 100644
index 00000000..8dc6ae94
--- /dev/null
+++ b/3d/lib/CSS3DRenderer.js
@@ -0,0 +1,308 @@
+import {
+ Matrix4,
+ Object3D,
+ Quaternion,
+ Vector3
+} from './three.module.js';
+
+/**
+ * Based on http://www.emagix.net/academic/mscs-project/item/camera-sync-with-css3-and-webgl-threejs
+ */
+
+const _position = new Vector3();
+const _quaternion = new Quaternion();
+const _scale = new Vector3();
+
+class CSS3DObject extends Object3D {
+
+ constructor( element = document.createElement( 'div' ) ) {
+
+ super();
+
+ this.element = element;
+ this.element.style.position = 'absolute';
+ this.element.style.pointerEvents = 'auto';
+ this.element.style.userSelect = 'none';
+
+ this.element.setAttribute( 'draggable', false );
+
+ this.addEventListener( 'removed', function () {
+
+ this.traverse( function ( object ) {
+
+ if ( object.element instanceof Element && object.element.parentNode !== null ) {
+
+ object.element.parentNode.removeChild( object.element );
+
+ }
+
+ } );
+
+ } );
+
+ }
+
+ copy( source, recursive ) {
+
+ super.copy( source, recursive );
+
+ this.element = source.element.cloneNode( true );
+
+ return this;
+
+ }
+
+}
+
+CSS3DObject.prototype.isCSS3DObject = true;
+
+class CSS3DSprite extends CSS3DObject {
+
+ constructor( element ) {
+
+ super( element );
+
+ this.rotation2D = 0;
+
+ }
+
+ copy( source, recursive ) {
+
+ super.copy( source, recursive );
+
+ this.rotation2D = source.rotation2D;
+
+ return this;
+
+ }
+
+}
+
+CSS3DSprite.prototype.isCSS3DSprite = true;
+
+//
+
+const _matrix = new Matrix4();
+const _matrix2 = new Matrix4();
+
+class CSS3DRenderer {
+
+ constructor( parameters = {} ) {
+
+ const _this = this;
+
+ let _width, _height;
+ let _widthHalf, _heightHalf;
+
+ const cache = {
+ camera: { fov: 0, style: '' },
+ objects: new WeakMap()
+ };
+
+ const domElement = parameters.element !== undefined ? parameters.element : document.createElement( 'div' );
+
+ domElement.style.overflow = 'hidden';
+
+ this.domElement = domElement;
+
+ const cameraElement = document.createElement( 'div' );
+
+ cameraElement.style.transformStyle = 'preserve-3d';
+ cameraElement.style.pointerEvents = 'none';
+
+ domElement.appendChild( cameraElement );
+
+ this.getSize = function () {
+
+ return {
+ width: _width,
+ height: _height
+ };
+
+ };
+
+ this.render = function ( scene, camera ) {
+
+ const fov = camera.projectionMatrix.elements[ 5 ] * _heightHalf;
+
+ if ( cache.camera.fov !== fov ) {
+
+ domElement.style.perspective = camera.isPerspectiveCamera ? fov + 'px' : '';
+ cache.camera.fov = fov;
+
+ }
+
+ if ( scene.autoUpdate === true ) scene.updateMatrixWorld();
+ if ( camera.parent === null ) camera.updateMatrixWorld();
+
+ let tx, ty;
+
+ if ( camera.isOrthographicCamera ) {
+
+ tx = - ( camera.right + camera.left ) / 2;
+ ty = ( camera.top + camera.bottom ) / 2;
+
+ }
+
+ const cameraCSSMatrix = camera.isOrthographicCamera ?
+ 'scale(' + fov + ')' + 'translate(' + epsilon( tx ) + 'px,' + epsilon( ty ) + 'px)' + getCameraCSSMatrix( camera.matrixWorldInverse ) :
+ 'translateZ(' + fov + 'px)' + getCameraCSSMatrix( camera.matrixWorldInverse );
+
+ const style = cameraCSSMatrix +
+ 'translate(' + _widthHalf + 'px,' + _heightHalf + 'px)';
+
+ if ( cache.camera.style !== style ) {
+
+ cameraElement.style.transform = style;
+
+ cache.camera.style = style;
+
+ }
+
+ renderObject( scene, scene, camera, cameraCSSMatrix );
+
+ };
+
+ this.setSize = function ( width, height ) {
+
+ _width = width;
+ _height = height;
+ _widthHalf = _width / 2;
+ _heightHalf = _height / 2;
+
+ domElement.style.width = width + 'px';
+ domElement.style.height = height + 'px';
+
+ cameraElement.style.width = width + 'px';
+ cameraElement.style.height = height + 'px';
+
+ };
+
+ function epsilon( value ) {
+
+ return Math.abs( value ) < 1e-10 ? 0 : value;
+
+ }
+
+ function getCameraCSSMatrix( matrix ) {
+
+ const elements = matrix.elements;
+
+ return 'matrix3d(' +
+ epsilon( elements[ 0 ] ) + ',' +
+ epsilon( - elements[ 1 ] ) + ',' +
+ epsilon( elements[ 2 ] ) + ',' +
+ epsilon( elements[ 3 ] ) + ',' +
+ epsilon( elements[ 4 ] ) + ',' +
+ epsilon( - elements[ 5 ] ) + ',' +
+ epsilon( elements[ 6 ] ) + ',' +
+ epsilon( elements[ 7 ] ) + ',' +
+ epsilon( elements[ 8 ] ) + ',' +
+ epsilon( - elements[ 9 ] ) + ',' +
+ epsilon( elements[ 10 ] ) + ',' +
+ epsilon( elements[ 11 ] ) + ',' +
+ epsilon( elements[ 12 ] ) + ',' +
+ epsilon( - elements[ 13 ] ) + ',' +
+ epsilon( elements[ 14 ] ) + ',' +
+ epsilon( elements[ 15 ] ) +
+ ')';
+
+ }
+
+ function getObjectCSSMatrix( matrix ) {
+
+ const elements = matrix.elements;
+ const matrix3d = 'matrix3d(' +
+ epsilon( elements[ 0 ] ) + ',' +
+ epsilon( elements[ 1 ] ) + ',' +
+ epsilon( elements[ 2 ] ) + ',' +
+ epsilon( elements[ 3 ] ) + ',' +
+ epsilon( - elements[ 4 ] ) + ',' +
+ epsilon( - elements[ 5 ] ) + ',' +
+ epsilon( - elements[ 6 ] ) + ',' +
+ epsilon( - elements[ 7 ] ) + ',' +
+ epsilon( elements[ 8 ] ) + ',' +
+ epsilon( elements[ 9 ] ) + ',' +
+ epsilon( elements[ 10 ] ) + ',' +
+ epsilon( elements[ 11 ] ) + ',' +
+ epsilon( elements[ 12 ] ) + ',' +
+ epsilon( elements[ 13 ] ) + ',' +
+ epsilon( elements[ 14 ] ) + ',' +
+ epsilon( elements[ 15 ] ) +
+ ')';
+
+ return 'translate(-50%,-50%)' + matrix3d;
+
+ }
+
+ function renderObject( object, scene, camera, cameraCSSMatrix ) {
+
+ if ( object.isCSS3DObject ) {
+
+ object.onBeforeRender( _this, scene, camera );
+
+ let style;
+
+ if ( object.isCSS3DSprite ) {
+
+ // http://swiftcoder.wordpress.com/2008/11/25/constructing-a-billboard-matrix/
+
+ _matrix.copy( camera.matrixWorldInverse );
+ _matrix.transpose();
+
+ if ( object.rotation2D !== 0 ) _matrix.multiply( _matrix2.makeRotationZ( object.rotation2D ) );
+
+ object.matrixWorld.decompose( _position, _quaternion, _scale );
+ _matrix.setPosition( _position );
+ _matrix.scale( _scale );
+
+ _matrix.elements[ 3 ] = 0;
+ _matrix.elements[ 7 ] = 0;
+ _matrix.elements[ 11 ] = 0;
+ _matrix.elements[ 15 ] = 1;
+
+ style = getObjectCSSMatrix( _matrix );
+
+ } else {
+
+ style = getObjectCSSMatrix( object.matrixWorld );
+
+ }
+
+ const element = object.element;
+ const cachedObject = cache.objects.get( object );
+
+ if ( cachedObject === undefined || cachedObject.style !== style ) {
+
+ element.style.transform = style;
+
+ const objectData = { style: style };
+ cache.objects.set( object, objectData );
+
+ }
+
+ element.style.display = object.visible ? '' : 'none';
+
+ if ( element.parentNode !== cameraElement ) {
+
+ cameraElement.appendChild( element );
+
+ }
+
+ object.onAfterRender( _this, scene, camera );
+
+ }
+
+ for ( let i = 0, l = object.children.length; i < l; i ++ ) {
+
+ renderObject( object.children[ i ], scene, camera, cameraCSSMatrix );
+
+ }
+
+ }
+
+ }
+
+}
+
+export { CSS3DObject, CSS3DSprite, CSS3DRenderer };
diff --git a/3d/lib/DRACOLoader.js b/3d/lib/DRACOLoader.js
new file mode 100644
index 00000000..28c20314
--- /dev/null
+++ b/3d/lib/DRACOLoader.js
@@ -0,0 +1,587 @@
+import {
+ BufferAttribute,
+ BufferGeometry,
+ FileLoader,
+ Loader
+} from './three.module.js';
+
+const _taskCache = new WeakMap();
+
+class DRACOLoader extends Loader {
+
+ constructor( manager ) {
+
+ super( manager );
+
+ this.decoderPath = '';
+ this.decoderConfig = {};
+ this.decoderBinary = null;
+ this.decoderPending = null;
+
+ this.workerLimit = 4;
+ this.workerPool = [];
+ this.workerNextTaskID = 1;
+ this.workerSourceURL = '';
+
+ this.defaultAttributeIDs = {
+ position: 'POSITION',
+ normal: 'NORMAL',
+ color: 'COLOR',
+ uv: 'TEX_COORD'
+ };
+ this.defaultAttributeTypes = {
+ position: 'Float32Array',
+ normal: 'Float32Array',
+ color: 'Float32Array',
+ uv: 'Float32Array'
+ };
+
+ }
+
+ setDecoderPath( path ) {
+
+ this.decoderPath = path;
+
+ return this;
+
+ }
+
+ setDecoderConfig( config ) {
+
+ this.decoderConfig = config;
+
+ return this;
+
+ }
+
+ setWorkerLimit( workerLimit ) {
+
+ this.workerLimit = workerLimit;
+
+ return this;
+
+ }
+
+ load( url, onLoad, onProgress, 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, ( buffer ) => {
+
+ const taskConfig = {
+ attributeIDs: this.defaultAttributeIDs,
+ attributeTypes: this.defaultAttributeTypes,
+ useUniqueIDs: false
+ };
+
+ this.decodeGeometry( buffer, taskConfig )
+ .then( onLoad )
+ .catch( onError );
+
+ }, onProgress, onError );
+
+ }
+
+ /** @deprecated Kept for backward-compatibility with previous DRACOLoader versions. */
+ decodeDracoFile( buffer, callback, attributeIDs, attributeTypes ) {
+
+ const taskConfig = {
+ attributeIDs: attributeIDs || this.defaultAttributeIDs,
+ attributeTypes: attributeTypes || this.defaultAttributeTypes,
+ useUniqueIDs: !! attributeIDs
+ };
+
+ this.decodeGeometry( buffer, taskConfig ).then( callback );
+
+ }
+
+ decodeGeometry( buffer, taskConfig ) {
+
+ // TODO: For backward-compatibility, support 'attributeTypes' objects containing
+ // references (rather than names) to typed array constructors. These must be
+ // serialized before sending them to the worker.
+ for ( const attribute in taskConfig.attributeTypes ) {
+
+ const type = taskConfig.attributeTypes[ attribute ];
+
+ if ( type.BYTES_PER_ELEMENT !== undefined ) {
+
+ taskConfig.attributeTypes[ attribute ] = type.name;
+
+ }
+
+ }
+
+ //
+
+ const taskKey = JSON.stringify( taskConfig );
+
+ // Check for an existing task using this buffer. A transferred buffer cannot be transferred
+ // again from this thread.
+ if ( _taskCache.has( buffer ) ) {
+
+ const cachedTask = _taskCache.get( buffer );
+
+ if ( cachedTask.key === taskKey ) {
+
+ return cachedTask.promise;
+
+ } else if ( buffer.byteLength === 0 ) {
+
+ // Technically, it would be possible to wait for the previous task to complete,
+ // transfer the buffer back, and decode again with the second configuration. That
+ // is complex, and I don't know of any reason to decode a Draco buffer twice in
+ // different ways, so this is left unimplemented.
+ throw new Error(
+
+ 'THREE.DRACOLoader: Unable to re-decode a buffer with different ' +
+ 'settings. Buffer has already been transferred.'
+
+ );
+
+ }
+
+ }
+
+ //
+
+ let worker;
+ const taskID = this.workerNextTaskID ++;
+ const taskCost = buffer.byteLength;
+
+ // Obtain a worker and assign a task, and construct a geometry instance
+ // when the task completes.
+ const geometryPending = this._getWorker( taskID, taskCost )
+ .then( ( _worker ) => {
+
+ worker = _worker;
+
+ return new Promise( ( resolve, reject ) => {
+
+ worker._callbacks[ taskID ] = { resolve, reject };
+
+ worker.postMessage( { type: 'decode', id: taskID, taskConfig, buffer }, [ buffer ] );
+
+ // this.debug();
+
+ } );
+
+ } )
+ .then( ( message ) => this._createGeometry( message.geometry ) );
+
+ // Remove task from the task list.
+ // Note: replaced '.finally()' with '.catch().then()' block - iOS 11 support (#19416)
+ geometryPending
+ .catch( () => true )
+ .then( () => {
+
+ if ( worker && taskID ) {
+
+ this._releaseTask( worker, taskID );
+
+ // this.debug();
+
+ }
+
+ } );
+
+ // Cache the task result.
+ _taskCache.set( buffer, {
+
+ key: taskKey,
+ promise: geometryPending
+
+ } );
+
+ return geometryPending;
+
+ }
+
+ _createGeometry( geometryData ) {
+
+ const geometry = new BufferGeometry();
+
+ if ( geometryData.index ) {
+
+ geometry.setIndex( new BufferAttribute( geometryData.index.array, 1 ) );
+
+ }
+
+ for ( let i = 0; i < geometryData.attributes.length; i ++ ) {
+
+ const attribute = geometryData.attributes[ i ];
+ const name = attribute.name;
+ const array = attribute.array;
+ const itemSize = attribute.itemSize;
+
+ geometry.setAttribute( name, new BufferAttribute( array, itemSize ) );
+
+ }
+
+ return geometry;
+
+ }
+
+ _loadLibrary( url, responseType ) {
+
+ const loader = new FileLoader( this.manager );
+ loader.setPath( this.decoderPath );
+ loader.setResponseType( responseType );
+ loader.setWithCredentials( this.withCredentials );
+
+ return new Promise( ( resolve, reject ) => {
+
+ loader.load( url, resolve, undefined, reject );
+
+ } );
+
+ }
+
+ preload() {
+
+ this._initDecoder();
+
+ return this;
+
+ }
+
+ _initDecoder() {
+
+ if ( this.decoderPending ) return this.decoderPending;
+
+ const useJS = typeof WebAssembly !== 'object' || this.decoderConfig.type === 'js';
+ const librariesPending = [];
+
+ if ( useJS ) {
+
+ librariesPending.push( this._loadLibrary( 'draco_decoder.js', 'text' ) );
+
+ } else {
+
+ librariesPending.push( this._loadLibrary( 'draco_wasm_wrapper.js', 'text' ) );
+ librariesPending.push( this._loadLibrary( 'draco_decoder.wasm', 'arraybuffer' ) );
+
+ }
+
+ this.decoderPending = Promise.all( librariesPending )
+ .then( ( libraries ) => {
+
+ const jsContent = libraries[ 0 ];
+
+ if ( ! useJS ) {
+
+ this.decoderConfig.wasmBinary = libraries[ 1 ];
+
+ }
+
+ const fn = DRACOWorker.toString();
+
+ const body = [
+ '/* draco decoder */',
+ jsContent,
+ '',
+ '/* worker */',
+ fn.substring( fn.indexOf( '{' ) + 1, fn.lastIndexOf( '}' ) )
+ ].join( '\n' );
+
+ this.workerSourceURL = URL.createObjectURL( new Blob( [ body ] ) );
+
+ } );
+
+ return this.decoderPending;
+
+ }
+
+ _getWorker( taskID, taskCost ) {
+
+ return this._initDecoder().then( () => {
+
+ if ( this.workerPool.length < this.workerLimit ) {
+
+ const worker = new Worker( this.workerSourceURL );
+
+ worker._callbacks = {};
+ worker._taskCosts = {};
+ worker._taskLoad = 0;
+
+ worker.postMessage( { type: 'init', decoderConfig: this.decoderConfig } );
+
+ worker.onmessage = function ( e ) {
+
+ const message = e.data;
+
+ switch ( message.type ) {
+
+ case 'decode':
+ worker._callbacks[ message.id ].resolve( message );
+ break;
+
+ case 'error':
+ worker._callbacks[ message.id ].reject( message );
+ break;
+
+ default:
+ console.error( 'THREE.DRACOLoader: Unexpected message, "' + message.type + '"' );
+
+ }
+
+ };
+
+ this.workerPool.push( worker );
+
+ } else {
+
+ this.workerPool.sort( function ( a, b ) {
+
+ return a._taskLoad > b._taskLoad ? - 1 : 1;
+
+ } );
+
+ }
+
+ const worker = this.workerPool[ this.workerPool.length - 1 ];
+ worker._taskCosts[ taskID ] = taskCost;
+ worker._taskLoad += taskCost;
+ return worker;
+
+ } );
+
+ }
+
+ _releaseTask( worker, taskID ) {
+
+ worker._taskLoad -= worker._taskCosts[ taskID ];
+ delete worker._callbacks[ taskID ];
+ delete worker._taskCosts[ taskID ];
+
+ }
+
+ debug() {
+
+ console.log( 'Task load: ', this.workerPool.map( ( worker ) => worker._taskLoad ) );
+
+ }
+
+ dispose() {
+
+ for ( let i = 0; i < this.workerPool.length; ++ i ) {
+
+ this.workerPool[ i ].terminate();
+
+ }
+
+ this.workerPool.length = 0;
+
+ return this;
+
+ }
+
+}
+
+/* WEB WORKER */
+
+function DRACOWorker() {
+
+ let decoderConfig;
+ let decoderPending;
+
+ onmessage = function ( e ) {
+
+ const message = e.data;
+
+ switch ( message.type ) {
+
+ case 'init':
+ decoderConfig = message.decoderConfig;
+ decoderPending = new Promise( function ( resolve/*, reject*/ ) {
+
+ decoderConfig.onModuleLoaded = function ( draco ) {
+
+ // Module is Promise-like. Wrap before resolving to avoid loop.
+ resolve( { draco: draco } );
+
+ };
+
+ DracoDecoderModule( decoderConfig ); // eslint-disable-line no-undef
+
+ } );
+ break;
+
+ case 'decode':
+ const buffer = message.buffer;
+ const taskConfig = message.taskConfig;
+ decoderPending.then( ( module ) => {
+
+ const draco = module.draco;
+ const decoder = new draco.Decoder();
+ const decoderBuffer = new draco.DecoderBuffer();
+ decoderBuffer.Init( new Int8Array( buffer ), buffer.byteLength );
+
+ try {
+
+ const geometry = decodeGeometry( draco, decoder, decoderBuffer, taskConfig );
+
+ const buffers = geometry.attributes.map( ( attr ) => attr.array.buffer );
+
+ if ( geometry.index ) buffers.push( geometry.index.array.buffer );
+
+ self.postMessage( { type: 'decode', id: message.id, geometry }, buffers );
+
+ } catch ( error ) {
+
+ console.error( error );
+
+ self.postMessage( { type: 'error', id: message.id, error: error.message } );
+
+ } finally {
+
+ draco.destroy( decoderBuffer );
+ draco.destroy( decoder );
+
+ }
+
+ } );
+ break;
+
+ }
+
+ };
+
+ function decodeGeometry( draco, decoder, decoderBuffer, taskConfig ) {
+
+ const attributeIDs = taskConfig.attributeIDs;
+ const attributeTypes = taskConfig.attributeTypes;
+
+ let dracoGeometry;
+ let decodingStatus;
+
+ const geometryType = decoder.GetEncodedGeometryType( decoderBuffer );
+
+ if ( geometryType === draco.TRIANGULAR_MESH ) {
+
+ dracoGeometry = new draco.Mesh();
+ decodingStatus = decoder.DecodeBufferToMesh( decoderBuffer, dracoGeometry );
+
+ } else if ( geometryType === draco.POINT_CLOUD ) {
+
+ dracoGeometry = new draco.PointCloud();
+ decodingStatus = decoder.DecodeBufferToPointCloud( decoderBuffer, dracoGeometry );
+
+ } else {
+
+ throw new Error( 'THREE.DRACOLoader: Unexpected geometry type.' );
+
+ }
+
+ if ( ! decodingStatus.ok() || dracoGeometry.ptr === 0 ) {
+
+ throw new Error( 'THREE.DRACOLoader: Decoding failed: ' + decodingStatus.error_msg() );
+
+ }
+
+ const geometry = { index: null, attributes: [] };
+
+ // Gather all vertex attributes.
+ for ( const attributeName in attributeIDs ) {
+
+ const attributeType = self[ attributeTypes[ attributeName ] ];
+
+ let attribute;
+ let attributeID;
+
+ // A Draco file may be created with default vertex attributes, whose attribute IDs
+ // are mapped 1:1 from their semantic name (POSITION, NORMAL, ...). Alternatively,
+ // a Draco file may contain a custom set of attributes, identified by known unique
+ // IDs. glTF files always do the latter, and `.drc` files typically do the former.
+ if ( taskConfig.useUniqueIDs ) {
+
+ attributeID = attributeIDs[ attributeName ];
+ attribute = decoder.GetAttributeByUniqueId( dracoGeometry, attributeID );
+
+ } else {
+
+ attributeID = decoder.GetAttributeId( dracoGeometry, draco[ attributeIDs[ attributeName ] ] );
+
+ if ( attributeID === - 1 ) continue;
+
+ attribute = decoder.GetAttribute( dracoGeometry, attributeID );
+
+ }
+
+ geometry.attributes.push( decodeAttribute( draco, decoder, dracoGeometry, attributeName, attributeType, attribute ) );
+
+ }
+
+ // Add index.
+ if ( geometryType === draco.TRIANGULAR_MESH ) {
+
+ geometry.index = decodeIndex( draco, decoder, dracoGeometry );
+
+ }
+
+ draco.destroy( dracoGeometry );
+
+ return geometry;
+
+ }
+
+ function decodeIndex( draco, decoder, dracoGeometry ) {
+
+ const numFaces = dracoGeometry.num_faces();
+ const numIndices = numFaces * 3;
+ const byteLength = numIndices * 4;
+
+ const ptr = draco._malloc( byteLength );
+ decoder.GetTrianglesUInt32Array( dracoGeometry, byteLength, ptr );
+ const index = new Uint32Array( draco.HEAPF32.buffer, ptr, numIndices ).slice();
+ draco._free( ptr );
+
+ return { array: index, itemSize: 1 };
+
+ }
+
+ function decodeAttribute( draco, decoder, dracoGeometry, attributeName, attributeType, attribute ) {
+
+ const numComponents = attribute.num_components();
+ const numPoints = dracoGeometry.num_points();
+ const numValues = numPoints * numComponents;
+ const byteLength = numValues * attributeType.BYTES_PER_ELEMENT;
+ const dataType = getDracoDataType( draco, attributeType );
+
+ const ptr = draco._malloc( byteLength );
+ decoder.GetAttributeDataArrayForAllPoints( dracoGeometry, attribute, dataType, byteLength, ptr );
+ const array = new attributeType( draco.HEAPF32.buffer, ptr, numValues ).slice();
+ draco._free( ptr );
+
+ return {
+ name: attributeName,
+ array: array,
+ itemSize: numComponents
+ };
+
+ }
+
+ function getDracoDataType( draco, attributeType ) {
+
+ switch ( attributeType ) {
+
+ case Float32Array: return draco.DT_FLOAT32;
+ case Int8Array: return draco.DT_INT8;
+ case Int16Array: return draco.DT_INT16;
+ case Int32Array: return draco.DT_INT32;
+ case Uint8Array: return draco.DT_UINT8;
+ case Uint16Array: return draco.DT_UINT16;
+ case Uint32Array: return draco.DT_UINT32;
+
+ }
+
+ }
+
+}
+
+export { DRACOLoader };
diff --git a/3d/lib/GLTFLoader.js b/3d/lib/GLTFLoader.js
new file mode 100644
index 00000000..5c356366
--- /dev/null
+++ b/3d/lib/GLTFLoader.js
@@ -0,0 +1,4349 @@
+import {
+ AnimationClip,
+ Bone,
+ Box3,
+ BufferAttribute,
+ BufferGeometry,
+ 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,
+ Quaternion,
+ QuaternionKeyframeTrack,
+ RGBFormat,
+ RepeatWrapping,
+ Skeleton,
+ SkinnedMesh,
+ Sphere,
+ SpotLight,
+ TangentSpaceNormalMap,
+ Texture,
+ 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 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 GLTFMaterialsSpecularExtension( 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 );
+
+ }
+
+ parseAsync( data, path ) {
+
+ const scope = this;
+
+ return new Promise( function ( resolve, reject ) {
+
+ scope.parse( data, path, resolve, reject );
+
+ } );
+
+ }
+
+}
+
+/* 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_IOR: 'KHR_materials_ior',
+ KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS: 'KHR_materials_pbrSpecularGlossiness',
+ KHR_MATERIALS_SHEEN: 'KHR_materials_sheen',
+ KHR_MATERIALS_SPECULAR: 'KHR_materials_specular',
+ KHR_MATERIALS_TRANSMISSION: 'KHR_materials_transmission',
+ 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',
+ 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;
+
+ materialParams.clearcoatNormalScale = new Vector2( scale, scale );
+
+ }
+
+ }
+
+ return Promise.all( pending );
+
+ }
+
+}
+
+/**
+ * Sheen Materials Extension
+ *
+ * Specification: https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_materials_sheen
+ */
+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 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 !== undefined ) {
+
+ materialParams.sheenColor.fromArray( extension.sheenColorFactor );
+
+ }
+
+ if ( extension.sheenRoughnessFactor !== undefined ) {
+
+ materialParams.sheenRoughness = extension.sheenRoughnessFactor;
+
+ }
+
+ if ( extension.sheenColorTexture !== undefined ) {
+
+ pending.push( parser.assignTexture( materialParams, 'sheenColorMap', extension.sheenColorTexture ) );
+
+ }
+
+ if ( extension.sheenRoughnessTexture !== undefined ) {
+
+ pending.push( parser.assignTexture( materialParams, 'sheenRoughnessMap', extension.sheenRoughnessTexture ) );
+
+ }
+
+ 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 );
+
+ }
+
+}
+
+/**
+ * Materials Volume Extension
+ *
+ * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_volume
+ */
+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 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 !== undefined ? extension.thicknessFactor : 0;
+
+ if ( extension.thicknessTexture !== undefined ) {
+
+ pending.push( parser.assignTexture( materialParams, 'thicknessMap', extension.thicknessTexture ) );
+
+ }
+
+ materialParams.attenuationDistance = extension.attenuationDistance || 0;
+
+ const colorArray = extension.attenuationColor || [ 1, 1, 1 ];
+ materialParams.attenuationColor = new Color( colorArray[ 0 ], colorArray[ 1 ], colorArray[ 2 ] );
+
+ return Promise.all( pending );
+
+ }
+
+}
+
+/**
+ * Materials ior Extension
+ *
+ * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_ior
+ */
+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 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 !== undefined ? extension.ior : 1.5;
+
+ return Promise.resolve();
+
+ }
+
+}
+
+/**
+ * Materials specular Extension
+ *
+ * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_specular
+ */
+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 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 !== undefined ? extension.specularFactor : 1.0;
+
+ if ( extension.specularTexture !== undefined ) {
+
+ pending.push( parser.assignTexture( materialParams, 'specularIntensityMap', extension.specularTexture ) );
+
+ }
+
+ const colorArray = extension.specularColorFactor || [ 1, 1, 1 ];
+ materialParams.specularColor = new Color( colorArray[ 0 ], colorArray[ 1 ], colorArray[ 2 ] );
+
+ if ( extension.specularColorTexture !== undefined ) {
+
+ pending.push( parser.assignTexture( materialParams, 'specularColorMap', extension.specularColorTexture ).then( function ( texture ) {
+
+ texture.encoding = sRGBEncoding;
+
+ } ) );
+
+ }
+
+ 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 );
+
+ }
+
+ // Clients must ignore chunks with unknown types.
+
+ chunkIndex += chunkLength;
+
+ }
+
+ if ( this.content === null ) {
+
+ throw new Error( 'THREE.GLTFLoader: JSON content not found.' );
+
+ }
+
+ }
+
+}
+
+/**
+ * DRACO Mesh Compression Extension
+ *
+ * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_draco_mesh_compression
+ */
+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 ] !== undefined ) {
+
+ const accessorDef = json.accessors[ primitive.attributes[ attributeName ] ];
+ const componentType = WEBGL_COMPONENT_TYPES[ accessorDef.componentType ];
+
+ attributeTypeMap[ threeAttributeName ] = componentType;
+ attributeNormalizedMap[ threeAttributeName ] = accessorDef.normalized === true;
+
+ }
+
+ }
+
+ return parser.getDependency( 'bufferView', bufferViewIndex ).then( function ( bufferView ) {
+
+ return new Promise( function ( resolve ) {
+
+ dracoLoader.decodeDracoFile( bufferView, function ( geometry ) {
+
+ for ( const attributeName in geometry.attributes ) {
+
+ const attribute = geometry.attributes[ attributeName ];
+ const normalized = attributeNormalizedMap[ attributeName ];
+
+ if ( normalized !== undefined ) attribute.normalized = normalized;
+
+ }
+
+ resolve( geometry );
+
+ }, threeAttributeMap, attributeTypeMap );
+
+ } );
+
+ } );
+
+ }
+
+}
+
+/**
+ * Texture Transform Extension
+ *
+ * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_transform
+ */
+class GLTFTextureTransformExtension {
+
+ constructor() {
+
+ this.name = EXTENSIONS.KHR_TEXTURE_TRANSFORM;
+
+ }
+
+ extendTexture( texture, transform ) {
+
+ if ( transform.texCoord !== undefined ) {
+
+ console.warn( 'THREE.GLTFLoader: Custom UV sets in "' + this.name + '" extension not yet supported.' );
+
+ }
+
+ if ( transform.offset === undefined && transform.rotation === undefined && transform.scale === undefined ) {
+
+ // See https://github.com/mrdoob/three.js/issues/21819.
+ return texture;
+
+ }
+
+ texture = texture.clone();
+
+ if ( transform.offset !== undefined ) {
+
+ texture.offset.fromArray( transform.offset );
+
+ }
+
+ if ( transform.rotation !== undefined ) {
+
+ texture.rotation = transform.rotation;
+
+ }
+
+ if ( transform.scale !== undefined ) {
+
+ texture.repeat.fromArray( transform.scale );
+
+ }
+
+ texture.needsUpdate = true;
+
+ return texture;
+
+ }
+
+}
+
+/**
+ * Specular-Glossiness Extension
+ *
+ * Specification: https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Archived/KHR_materials_pbrSpecularGlossiness
+ */
+
+/**
+ * A sub class of StandardMaterial with some of the functionality
+ * changed via the `onBeforeCompile` callback
+ * @pailhead
+ */
+class GLTFMeshStandardSGMaterial extends MeshStandardMaterial {
+
+ constructor( params ) {
+
+ super();
+
+ this.isGLTFSpecularGlossinessMaterial = true;
+
+ //various chunks that need replacing
+ const specularMapParsFragmentChunk = [
+ '#ifdef USE_SPECULARMAP',
+ ' uniform sampler2D specularMap;',
+ '#endif'
+ ].join( '\n' );
+
+ const glossinessMapParsFragmentChunk = [
+ '#ifdef USE_GLOSSINESSMAP',
+ ' uniform sampler2D glossinessMap;',
+ '#endif'
+ ].join( '\n' );
+
+ const specularMapFragmentChunk = [
+ 'vec3 specularFactor = specular;',
+ '#ifdef USE_SPECULARMAP',
+ ' vec4 texelSpecular = texture2D( specularMap, vUv );',
+ ' texelSpecular = sRGBToLinear( texelSpecular );',
+ ' // reads channel RGB, compatible with a glTF Specular-Glossiness (RGBA) texture',
+ ' specularFactor *= texelSpecular.rgb;',
+ '#endif'
+ ].join( '\n' );
+
+ const glossinessMapFragmentChunk = [
+ 'float glossinessFactor = glossiness;',
+ '#ifdef USE_GLOSSINESSMAP',
+ ' vec4 texelGlossiness = texture2D( glossinessMap, vUv );',
+ ' // reads channel A, compatible with a glTF Specular-Glossiness (RGBA) texture',
+ ' glossinessFactor *= texelGlossiness.a;',
+ '#endif'
+ ].join( '\n' );
+
+ const lightPhysicalFragmentChunk = [
+ 'PhysicalMaterial material;',
+ 'material.diffuseColor = diffuseColor.rgb * ( 1. - max( specularFactor.r, max( specularFactor.g, specularFactor.b ) ) );',
+ 'vec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );',
+ 'float geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );',
+ 'material.roughness = max( 1.0 - glossinessFactor, 0.0525 ); // 0.0525 corresponds to the base mip of a 256 cubemap.',
+ 'material.roughness += geometryRoughness;',
+ 'material.roughness = min( material.roughness, 1.0 );',
+ 'material.specularColor = specularFactor;',
+ ].join( '\n' );
+
+ const uniforms = {
+ specular: { value: new Color().setHex( 0xffffff ) },
+ glossiness: { value: 1 },
+ specularMap: { value: null },
+ glossinessMap: { value: null }
+ };
+
+ this._extraUniforms = uniforms;
+
+ this.onBeforeCompile = function ( shader ) {
+
+ for ( const uniformName in uniforms ) {
+
+ shader.uniforms[ uniformName ] = uniforms[ uniformName ];
+
+ }
+
+ shader.fragmentShader = shader.fragmentShader
+ .replace( 'uniform float roughness;', 'uniform vec3 specular;' )
+ .replace( 'uniform float metalness;', 'uniform float glossiness;' )
+ .replace( '#include ', specularMapParsFragmentChunk )
+ .replace( '#include ', glossinessMapParsFragmentChunk )
+ .replace( '#include ', specularMapFragmentChunk )
+ .replace( '#include ', glossinessMapFragmentChunk )
+ .replace( '#include ', lightPhysicalFragmentChunk );
+
+ };
+
+ Object.defineProperties( this, {
+
+ specular: {
+ get: function () {
+
+ return uniforms.specular.value;
+
+ },
+ set: function ( v ) {
+
+ uniforms.specular.value = v;
+
+ }
+ },
+
+ specularMap: {
+ get: function () {
+
+ return uniforms.specularMap.value;
+
+ },
+ set: function ( v ) {
+
+ uniforms.specularMap.value = v;
+
+ if ( v ) {
+
+ this.defines.USE_SPECULARMAP = ''; // USE_UV is set by the renderer for specular maps
+
+ } else {
+
+ delete this.defines.USE_SPECULARMAP;
+
+ }
+
+ }
+ },
+
+ glossiness: {
+ get: function () {
+
+ return uniforms.glossiness.value;
+
+ },
+ set: function ( v ) {
+
+ uniforms.glossiness.value = v;
+
+ }
+ },
+
+ glossinessMap: {
+ get: function () {
+
+ return uniforms.glossinessMap.value;
+
+ },
+ set: function ( v ) {
+
+ uniforms.glossinessMap.value = v;
+
+ if ( v ) {
+
+ this.defines.USE_GLOSSINESSMAP = '';
+ this.defines.USE_UV = '';
+
+ } else {
+
+ delete this.defines.USE_GLOSSINESSMAP;
+ delete this.defines.USE_UV;
+
+ }
+
+ }
+ }
+
+ } );
+
+ delete this.metalness;
+ delete this.roughness;
+ delete this.metalnessMap;
+ delete this.roughnessMap;
+
+ this.setValues( params );
+
+ }
+
+ copy( source ) {
+
+ super.copy( source );
+
+ this.specularMap = source.specularMap;
+ this.specular.copy( source.specular );
+ this.glossinessMap = source.glossinessMap;
+ this.glossiness = source.glossiness;
+ delete this.metalness;
+ delete this.roughness;
+ delete this.metalnessMap;
+ delete this.roughnessMap;
+ return this;
+
+ }
+
+}
+
+
+class GLTFMaterialsPbrSpecularGlossinessExtension {
+
+ constructor() {
+
+ this.name = EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS;
+
+ this.specularGlossinessParams = [
+ 'color',
+ 'map',
+ 'lightMap',
+ 'lightMapIntensity',
+ 'aoMap',
+ 'aoMapIntensity',
+ 'emissive',
+ 'emissiveIntensity',
+ 'emissiveMap',
+ 'bumpMap',
+ 'bumpScale',
+ 'normalMap',
+ 'normalMapType',
+ 'displacementMap',
+ 'displacementScale',
+ 'displacementBias',
+ 'specularMap',
+ 'specular',
+ 'glossinessMap',
+ 'glossiness',
+ 'alphaMap',
+ 'envMap',
+ 'envMapIntensity',
+ 'refractionRatio',
+ ];
+
+ }
+
+ getMaterialType() {
+
+ return GLTFMeshStandardSGMaterial;
+
+ }
+
+ extendParams( materialParams, materialDef, parser ) {
+
+ const pbrSpecularGlossiness = materialDef.extensions[ this.name ];
+
+ materialParams.color = new Color( 1.0, 1.0, 1.0 );
+ materialParams.opacity = 1.0;
+
+ const pending = [];
+
+ if ( Array.isArray( pbrSpecularGlossiness.diffuseFactor ) ) {
+
+ const array = pbrSpecularGlossiness.diffuseFactor;
+
+ materialParams.color.fromArray( array );
+ materialParams.opacity = array[ 3 ];
+
+ }
+
+ if ( pbrSpecularGlossiness.diffuseTexture !== undefined ) {
+
+ pending.push( parser.assignTexture( materialParams, 'map', pbrSpecularGlossiness.diffuseTexture ) );
+
+ }
+
+ materialParams.emissive = new Color( 0.0, 0.0, 0.0 );
+ materialParams.glossiness = pbrSpecularGlossiness.glossinessFactor !== undefined ? pbrSpecularGlossiness.glossinessFactor : 1.0;
+ materialParams.specular = new Color( 1.0, 1.0, 1.0 );
+
+ if ( Array.isArray( pbrSpecularGlossiness.specularFactor ) ) {
+
+ materialParams.specular.fromArray( pbrSpecularGlossiness.specularFactor );
+
+ }
+
+ if ( pbrSpecularGlossiness.specularGlossinessTexture !== undefined ) {
+
+ const specGlossMapDef = pbrSpecularGlossiness.specularGlossinessTexture;
+ pending.push( parser.assignTexture( materialParams, 'glossinessMap', specGlossMapDef ) );
+ pending.push( parser.assignTexture( materialParams, 'specularMap', specGlossMapDef ) );
+
+ }
+
+ return Promise.all( pending );
+
+ }
+
+ createMaterial( materialParams ) {
+
+ const material = new GLTFMeshStandardSGMaterial( materialParams );
+ material.fog = true;
+
+ material.color = materialParams.color;
+
+ material.map = materialParams.map === undefined ? null : materialParams.map;
+
+ material.lightMap = null;
+ material.lightMapIntensity = 1.0;
+
+ material.aoMap = materialParams.aoMap === undefined ? null : materialParams.aoMap;
+ material.aoMapIntensity = 1.0;
+
+ material.emissive = materialParams.emissive;
+ material.emissiveIntensity = 1.0;
+ material.emissiveMap = materialParams.emissiveMap === undefined ? null : materialParams.emissiveMap;
+
+ material.bumpMap = materialParams.bumpMap === undefined ? null : materialParams.bumpMap;
+ material.bumpScale = 1;
+
+ material.normalMap = materialParams.normalMap === undefined ? null : materialParams.normalMap;
+ material.normalMapType = TangentSpaceNormalMap;
+
+ if ( materialParams.normalScale ) material.normalScale = materialParams.normalScale;
+
+ material.displacementMap = null;
+ material.displacementScale = 1;
+ material.displacementBias = 0;
+
+ material.specularMap = materialParams.specularMap === undefined ? null : materialParams.specularMap;
+ material.specular = materialParams.specular;
+
+ material.glossinessMap = materialParams.glossinessMap === undefined ? null : materialParams.glossinessMap;
+ material.glossiness = materialParams.glossiness;
+
+ material.alphaMap = null;
+
+ material.envMap = materialParams.envMap === undefined ? null : materialParams.envMap;
+ material.envMapIntensity = 1.0;
+
+ material.refractionRatio = 0.98;
+
+ return material;
+
+ }
+
+}
+
+/**
+ * Mesh Quantization Extension
+ *
+ * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_mesh_quantization
+ */
+class GLTFMeshQuantizationExtension {
+
+ constructor() {
+
+ this.name = EXTENSIONS.KHR_MESH_QUANTIZATION;
+
+ }
+
+}
+
+/*********************************/
+/********** INTERPOLATION ********/
+/*********************************/
+
+// Spline Interpolation
+// Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#appendix-c-spline-interpolation
+class GLTFCubicSplineInterpolant extends Interpolant {
+
+ constructor( parameterPositions, sampleValues, sampleSize, resultBuffer ) {
+
+ super( parameterPositions, sampleValues, sampleSize, resultBuffer );
+
+ }
+
+ copySampleValue_( index ) {
+
+ // Copies a sample value to the result buffer. See description of glTF
+ // CUBICSPLINE values layout in interpolate_() function below.
+
+ 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;
+
+ }
+
+}
+
+GLTFCubicSplineInterpolant.prototype.beforeStart_ = GLTFCubicSplineInterpolant.prototype.copySampleValue_;
+
+GLTFCubicSplineInterpolant.prototype.afterEnd_ = GLTFCubicSplineInterpolant.prototype.copySampleValue_;
+
+GLTFCubicSplineInterpolant.prototype.interpolate_ = function ( 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;
+
+ // Layout of keyframe output values for CUBICSPLINE animations:
+ // [ inTangent_1, splineVertex_1, outTangent_1, inTangent_2, splineVertex_2, ... ]
+ for ( let i = 0; i !== stride; i ++ ) {
+
+ const p0 = values[ offset0 + i + stride ]; // splineVertex_k
+ const m0 = values[ offset0 + i + stride2 ] * td; // outTangent_k * (t_k+1 - t_k)
+ const p1 = values[ offset1 + i + stride ]; // splineVertex_k+1
+ const m1 = values[ offset1 + i ] * td; // inTangent_k+1 * (t_k+1 - t_k)
+
+ result[ i ] = s0 * p0 + s1 * m0 + s2 * p1 + s3 * m1;
+
+ }
+
+ return result;
+
+};
+
+const _q = new 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;
+
+ }
+
+}
+
+
+/*********************************/
+/********** INTERNALS ************/
+/*********************************/
+
+/* CONSTANTS */
+
+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: 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: 'uv2',
+ COLOR_0: 'color',
+ WEIGHTS_0: 'skinWeight',
+ JOINTS_0: 'skinIndex',
+};
+
+const PATH_PROPERTIES = {
+ scale: 'scale',
+ translation: 'position',
+ rotation: 'quaternion',
+ weights: 'morphTargetInfluences'
+};
+
+const INTERPOLATION = {
+ CUBICSPLINE: undefined, // 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'
+};
+
+/**
+ * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#default-material
+ */
+function createDefaultMaterial( cache ) {
+
+ if ( cache[ 'DefaultMaterial' ] === undefined ) {
+
+ cache[ 'DefaultMaterial' ] = new MeshStandardMaterial( {
+ color: 0xFFFFFF,
+ emissive: 0x000000,
+ metalness: 1,
+ roughness: 1,
+ transparent: false,
+ depthTest: true,
+ side: FrontSide
+ } );
+
+ }
+
+ return cache[ 'DefaultMaterial' ];
+
+}
+
+function addUnknownExtensionsToUserData( knownExtensions, object, objectDef ) {
+
+ // Add unknown glTF extensions to an object's userData.
+
+ for ( const name in objectDef.extensions ) {
+
+ if ( knownExtensions[ name ] === undefined ) {
+
+ object.userData.gltfExtensions = object.userData.gltfExtensions || {};
+ object.userData.gltfExtensions[ name ] = objectDef.extensions[ name ];
+
+ }
+
+ }
+
+}
+
+/**
+ * @param {Object3D|Material|BufferGeometry} object
+ * @param {GLTF.definition} gltfDef
+ */
+function assignExtrasToUserData( object, gltfDef ) {
+
+ if ( gltfDef.extras !== undefined ) {
+
+ if ( typeof gltfDef.extras === 'object' ) {
+
+ Object.assign( object.userData, gltfDef.extras );
+
+ } else {
+
+ console.warn( 'THREE.GLTFLoader: Ignoring primitive type .extras, ' + gltfDef.extras );
+
+ }
+
+ }
+
+}
+
+/**
+ * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#morph-targets
+ *
+ * @param {BufferGeometry} geometry
+ * @param {Array} targets
+ * @param {GLTFParser} parser
+ * @return {Promise}
+ */
+function addMorphTargets( geometry, targets, parser ) {
+
+ let hasMorphPosition = false;
+ let hasMorphNormal = false;
+
+ for ( let i = 0, il = targets.length; i < il; i ++ ) {
+
+ const target = targets[ i ];
+
+ if ( target.POSITION !== undefined ) hasMorphPosition = true;
+ if ( target.NORMAL !== undefined ) hasMorphNormal = true;
+
+ if ( hasMorphPosition && hasMorphNormal ) break;
+
+ }
+
+ if ( ! hasMorphPosition && ! hasMorphNormal ) return Promise.resolve( geometry );
+
+ const pendingPositionAccessors = [];
+ const pendingNormalAccessors = [];
+
+ for ( let i = 0, il = targets.length; i < il; i ++ ) {
+
+ const target = targets[ i ];
+
+ if ( hasMorphPosition ) {
+
+ const pendingAccessor = target.POSITION !== undefined
+ ? parser.getDependency( 'accessor', target.POSITION )
+ : geometry.attributes.position;
+
+ pendingPositionAccessors.push( pendingAccessor );
+
+ }
+
+ if ( hasMorphNormal ) {
+
+ const pendingAccessor = target.NORMAL !== undefined
+ ? parser.getDependency( 'accessor', target.NORMAL )
+ : geometry.attributes.normal;
+
+ pendingNormalAccessors.push( pendingAccessor );
+
+ }
+
+ }
+
+ return Promise.all( [
+ Promise.all( pendingPositionAccessors ),
+ Promise.all( pendingNormalAccessors )
+ ] ).then( function ( accessors ) {
+
+ const morphPositions = accessors[ 0 ];
+ const morphNormals = accessors[ 1 ];
+
+ if ( hasMorphPosition ) geometry.morphAttributes.position = morphPositions;
+ if ( hasMorphNormal ) geometry.morphAttributes.normal = morphNormals;
+ geometry.morphTargetsRelative = true;
+
+ return geometry;
+
+ } );
+
+}
+
+/**
+ * @param {Mesh} mesh
+ * @param {GLTF.Mesh} meshDef
+ */
+function updateMorphTargets( mesh, meshDef ) {
+
+ mesh.updateMorphTargets();
+
+ if ( meshDef.weights !== undefined ) {
+
+ for ( let i = 0, il = meshDef.weights.length; i < il; i ++ ) {
+
+ mesh.morphTargetInfluences[ i ] = meshDef.weights[ i ];
+
+ }
+
+ }
+
+ // .extras has user-defined data, so check that .extras.targetNames is an array.
+ 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 ) {
+
+ const dracoExtension = primitiveDef.extensions && primitiveDef.extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ];
+ let geometryKey;
+
+ if ( dracoExtension ) {
+
+ geometryKey = 'draco:' + dracoExtension.bufferView
+ + ':' + dracoExtension.indices
+ + ':' + createAttributesKey( dracoExtension.attributes );
+
+ } else {
+
+ geometryKey = primitiveDef.indices + ':' + createAttributesKey( primitiveDef.attributes ) + ':' + primitiveDef.mode;
+
+ }
+
+ 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 ) {
+
+ // Reference:
+ // https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_mesh_quantization#encoding-quantized-data
+
+ 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.' );
+
+ }
+
+}
+
+/* GLTF PARSER */
+
+class GLTFParser {
+
+ constructor( json = {}, options = {} ) {
+
+ this.json = json;
+ this.extensions = {};
+ this.plugins = {};
+ this.options = options;
+
+ // loader object cache
+ this.cache = new GLTFRegistry();
+
+ // associations between Three.js objects and glTF elements
+ this.associations = new Map();
+
+ // BufferGeometry caching
+ this.primitiveCache = {};
+
+ // Object3D instance caches
+ this.meshCache = { refs: {}, uses: {} };
+ this.cameraCache = { refs: {}, uses: {} };
+ this.lightCache = { refs: {}, uses: {} };
+
+ this.textureCache = {};
+
+ // Track node names, to ensure no duplicates
+ this.nodeNamesUsed = {};
+
+ // Use an ImageBitmapLoader if imageBitmaps are supported. Moves much of the
+ // expensive work of uploading a texture to the GPU off the main thread.
+ if ( typeof createImageBitmap !== 'undefined' && /Firefox|Safari/.test( navigator.userAgent ) === false ) {
+
+ this.textureLoader = new ImageBitmapLoader( this.options.manager );
+
+ } else {
+
+ this.textureLoader = new TextureLoader( 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;
+
+ // Clear the loader cache
+ this.cache.removeAll();
+
+ // Mark the special nodes/meshes in json for efficient parse
+ 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: parser,
+ userData: {}
+ };
+
+ addUnknownExtensionsToUserData( extensions, result, json );
+
+ assignExtrasToUserData( result, json );
+
+ Promise.all( parser._invokeAll( function ( ext ) {
+
+ return ext.afterRoot && ext.afterRoot( result );
+
+ } ) ).then( function () {
+
+ 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 || [];
+
+ // Nothing in the node definition indicates whether it is a Bone or an
+ // Object3D. Use the skins' joint references to mark bones.
+ 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;
+
+ }
+
+ }
+
+ // Iterate over all nodes, marking references to shared resources,
+ // as well as skeleton joints.
+ for ( let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex ++ ) {
+
+ const nodeDef = nodeDefs[ nodeIndex ];
+
+ if ( nodeDef.mesh !== undefined ) {
+
+ this._addNodeRef( this.meshCache, nodeDef.mesh );
+
+ // Nothing in the mesh definition indicates whether it is
+ // a SkinnedMesh or Mesh. Use the node's mesh reference
+ // to mark SkinnedMesh if node has skin.
+ if ( nodeDef.skin !== undefined ) {
+
+ meshDefs[ nodeDef.mesh ].isSkinnedMesh = true;
+
+ }
+
+ }
+
+ if ( nodeDef.camera !== undefined ) {
+
+ 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 === undefined ) return;
+
+ if ( cache.refs[ index ] === undefined ) {
+
+ 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();
+
+ // Propagates mappings to the cloned object, prevents mappings on the
+ // original object from being lost.
+ const updateMappings = ( 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( 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}
+ */
+ 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.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.loadAnimation( index );
+ break;
+
+ case 'camera':
+ dependency = this.loadCamera( index );
+ break;
+
+ default:
+ throw new Error( 'Unknown type: ' + type );
+
+ }
+
+ this.cache.add( cacheKey, dependency );
+
+ }
+
+ return dependency;
+
+ }
+
+ /**
+ * Requests all dependencies of the specified type asynchronously, with caching.
+ * @param {string} type
+ * @return {Promise>}
+ */
+ 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}
+ */
+ 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 present, GLB container is required to be the first buffer.
+ if ( bufferDef.uri === undefined && 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, undefined, 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}
+ */
+ 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}
+ */
+ loadAccessor( accessorIndex ) {
+
+ const parser = this;
+ const json = this.json;
+
+ const accessorDef = this.json.accessors[ accessorIndex ];
+
+ if ( accessorDef.bufferView === undefined && accessorDef.sparse === undefined ) {
+
+ // Ignore empty accessors, which may be used to declare runtime
+ // information about attributes coming from another source (e.g. Draco
+ // compression extension).
+ return Promise.resolve( null );
+
+ }
+
+ const pendingBufferViews = [];
+
+ if ( accessorDef.bufferView !== undefined ) {
+
+ pendingBufferViews.push( this.getDependency( 'bufferView', accessorDef.bufferView ) );
+
+ } else {
+
+ pendingBufferViews.push( null );
+
+ }
+
+ if ( accessorDef.sparse !== undefined ) {
+
+ 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 ];
+
+ // For VEC3: itemSize is 3, elementBytes is 4, itemBytes is 12.
+ const elementBytes = TypedArray.BYTES_PER_ELEMENT;
+ const itemBytes = elementBytes * itemSize;
+ const byteOffset = accessorDef.byteOffset || 0;
+ const byteStride = accessorDef.bufferView !== undefined ? json.bufferViews[ accessorDef.bufferView ].byteStride : undefined;
+ const normalized = accessorDef.normalized === true;
+ let array, bufferAttribute;
+
+ // The buffer is not interleaved if the stride is the item size in bytes.
+ if ( byteStride && byteStride !== itemBytes ) {
+
+ // Each "slice" of the buffer, as defined by 'count' elements of 'byteStride' bytes, gets its own InterleavedBuffer
+ // This makes sure that IBA.count reflects accessor.count properly
+ 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 );
+
+ // Integer parameters to IB/IBA are in array elements, not bytes.
+ 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 );
+
+ }
+
+ // https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#sparse-accessors
+ if ( accessorDef.sparse !== undefined ) {
+
+ 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 ) {
+
+ // Avoid modifying the original ArrayBuffer, if the bufferView wasn't initialized with zeroes.
+ bufferAttribute = new BufferAttribute( bufferAttribute.array.slice(), bufferAttribute.itemSize, bufferAttribute.normalized );
+
+ }
+
+ 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.' );
+
+ }
+
+ }
+
+ return bufferAttribute;
+
+ } );
+
+ }
+
+ /**
+ * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#textures
+ * @param {number} textureIndex
+ * @return {Promise}
+ */
+ loadTexture( textureIndex ) {
+
+ const json = this.json;
+ const options = this.options;
+ const textureDef = json.textures[ textureIndex ];
+ const source = json.images[ textureDef.source ];
+
+ let loader = this.textureLoader;
+
+ if ( source.uri ) {
+
+ const handler = options.manager.getHandler( source.uri );
+ if ( handler !== null ) loader = handler;
+
+ }
+
+ return this.loadTextureImage( textureIndex, source, loader );
+
+ }
+
+ loadTextureImage( textureIndex, source, loader ) {
+
+ const parser = this;
+ const json = this.json;
+ const options = this.options;
+
+ const textureDef = json.textures[ textureIndex ];
+
+ const cacheKey = ( source.uri || source.bufferView ) + ':' + textureDef.sampler;
+
+ if ( this.textureCache[ cacheKey ] ) {
+
+ // See https://github.com/mrdoob/three.js/issues/21559.
+ return this.textureCache[ cacheKey ];
+
+ }
+
+ const URL = self.URL || self.webkitURL;
+
+ let sourceURI = source.uri || '';
+ let isObjectURL = false;
+
+ if ( source.bufferView !== undefined ) {
+
+ // Load binary image data from bufferView, if provided.
+
+ sourceURI = parser.getDependency( 'bufferView', source.bufferView ).then( function ( bufferView ) {
+
+ isObjectURL = true;
+ const blob = new Blob( [ bufferView ], { type: source.mimeType } );
+ sourceURI = URL.createObjectURL( blob );
+ return sourceURI;
+
+ } );
+
+ } else if ( source.uri === undefined ) {
+
+ throw new Error( 'THREE.GLTFLoader: Image ' + textureIndex + ' is missing URI and bufferView' );
+
+ }
+
+ const promise = Promise.resolve( sourceURI ).then( function ( sourceURI ) {
+
+ return new Promise( function ( resolve, reject ) {
+
+ let onLoad = resolve;
+
+ if ( loader.isImageBitmapLoader === true ) {
+
+ onLoad = function ( imageBitmap ) {
+
+ const texture = new Texture( imageBitmap );
+ texture.needsUpdate = true;
+
+ resolve( texture );
+
+ };
+
+ }
+
+ loader.load( LoaderUtils.resolveURL( sourceURI, options.path ), onLoad, undefined, reject );
+
+ } );
+
+ } ).then( function ( texture ) {
+
+ // Clean up resources and configure Texture.
+
+ if ( isObjectURL === true ) {
+
+ URL.revokeObjectURL( sourceURI );
+
+ }
+
+ texture.flipY = false;
+
+ if ( textureDef.name ) texture.name = textureDef.name;
+
+ 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;
+
+ parser.associations.set( texture, { textures: textureIndex } );
+
+ return texture;
+
+ } ).catch( function () {
+
+ console.error( 'THREE.GLTFLoader: Couldn\'t load texture', sourceURI );
+ return null;
+
+ } );
+
+ this.textureCache[ cacheKey ] = promise;
+
+ return promise;
+
+ }
+
+ /**
+ * Asynchronously assigns a texture to the given material parameters.
+ * @param {Object} materialParams
+ * @param {string} mapName
+ * @param {Object} mapDef
+ * @return {Promise}
+ */
+ assignTexture( materialParams, mapName, mapDef ) {
+
+ const parser = this;
+
+ return this.getDependency( 'texture', mapDef.index ).then( function ( texture ) {
+
+ // Materials sample aoMap from UV set 1 and other maps from UV set 0 - this can't be configured
+ // However, we will copy UV set 0 to UV set 1 on demand for aoMap
+ if ( mapDef.texCoord !== undefined && mapDef.texCoord != 0 && ! ( mapName === 'aoMap' && mapDef.texCoord == 1 ) ) {
+
+ console.warn( 'THREE.GLTFLoader: Custom UV set ' + mapDef.texCoord + ' for texture ' + mapName + ' not yet supported.' );
+
+ }
+
+ if ( parser.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] ) {
+
+ const transform = mapDef.extensions !== undefined ? mapDef.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] : undefined;
+
+ if ( transform ) {
+
+ const gltfReference = parser.associations.get( texture );
+ texture = parser.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ].extendTexture( texture, transform );
+ parser.associations.set( texture, gltfReference );
+
+ }
+
+ }
+
+ 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 === undefined;
+ const useVertexColors = geometry.attributes.color !== undefined;
+ const useFlatShading = geometry.attributes.normal === undefined;
+
+ 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; // glTF spec says points should be 1px
+
+ 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 );
+
+ this.cache.add( cacheKey, lineMaterial );
+
+ }
+
+ material = lineMaterial;
+
+ }
+
+ // Clone the material if it will be modified
+ if ( useDerivativeTangents || useVertexColors || useFlatShading ) {
+
+ let cacheKey = 'ClonedMaterial:' + material.uuid + ':';
+
+ if ( material.isGLTFSpecularGlossinessMaterial ) cacheKey += 'specular-glossiness:';
+ 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 ) {
+
+ // https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
+ 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;
+
+ }
+
+ // workarounds for mesh and geometry
+
+ if ( material.aoMap && geometry.attributes.uv2 === undefined && geometry.attributes.uv !== undefined ) {
+
+ geometry.setAttribute( 'uv2', geometry.attributes.uv );
+
+ }
+
+ mesh.material = material;
+
+ }
+
+ getMaterialType( /* materialIndex */ ) {
+
+ return MeshStandardMaterial;
+
+ }
+
+ /**
+ * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#materials
+ * @param {number} materialIndex
+ * @return {Promise}
+ */
+ 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_PBR_SPECULAR_GLOSSINESS ] ) {
+
+ const sgExtension = extensions[ EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ];
+ materialType = sgExtension.getMaterialType();
+ pending.push( sgExtension.extendParams( materialParams, materialDef, parser ) );
+
+ } else if ( materialExtensions[ EXTENSIONS.KHR_MATERIALS_UNLIT ] ) {
+
+ const kmuExtension = extensions[ EXTENSIONS.KHR_MATERIALS_UNLIT ];
+ materialType = kmuExtension.getMaterialType();
+ pending.push( kmuExtension.extendParams( materialParams, materialDef, parser ) );
+
+ } else {
+
+ // Specification:
+ // https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#metallic-roughness-material
+
+ const metallicRoughness = materialDef.pbrMetallicRoughness || {};
+
+ materialParams.color = new Color( 1.0, 1.0, 1.0 );
+ materialParams.opacity = 1.0;
+
+ 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 ) );
+
+ }
+
+ materialParams.metalness = metallicRoughness.metallicFactor !== undefined ? metallicRoughness.metallicFactor : 1.0;
+ materialParams.roughness = metallicRoughness.roughnessFactor !== undefined ? metallicRoughness.roughnessFactor : 1.0;
+
+ if ( metallicRoughness.metallicRoughnessTexture !== undefined ) {
+
+ 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;
+
+ // See: https://github.com/mrdoob/three.js/issues/17706
+ materialParams.depthWrite = false;
+
+ } else {
+
+ materialParams.format = RGBFormat;
+ materialParams.transparent = false;
+
+ if ( alphaMode === ALPHA_MODES.MASK ) {
+
+ materialParams.alphaTest = materialDef.alphaCutoff !== undefined ? materialDef.alphaCutoff : 0.5;
+
+ }
+
+ }
+
+ if ( materialDef.normalTexture !== undefined && materialType !== MeshBasicMaterial ) {
+
+ pending.push( parser.assignTexture( materialParams, 'normalMap', materialDef.normalTexture ) );
+
+ materialParams.normalScale = new Vector2( 1, 1 );
+
+ if ( materialDef.normalTexture.scale !== undefined ) {
+
+ const scale = materialDef.normalTexture.scale;
+
+ materialParams.normalScale.set( scale, scale );
+
+ }
+
+ }
+
+ if ( materialDef.occlusionTexture !== undefined && materialType !== MeshBasicMaterial ) {
+
+ pending.push( parser.assignTexture( materialParams, 'aoMap', materialDef.occlusionTexture ) );
+
+ if ( materialDef.occlusionTexture.strength !== undefined ) {
+
+ materialParams.aoMapIntensity = materialDef.occlusionTexture.strength;
+
+ }
+
+ }
+
+ if ( materialDef.emissiveFactor !== undefined && materialType !== MeshBasicMaterial ) {
+
+ materialParams.emissive = new Color().fromArray( materialDef.emissiveFactor );
+
+ }
+
+ if ( materialDef.emissiveTexture !== undefined && materialType !== MeshBasicMaterial ) {
+
+ pending.push( parser.assignTexture( materialParams, 'emissiveMap', materialDef.emissiveTexture ) );
+
+ }
+
+ return Promise.all( pending ).then( function () {
+
+ let material;
+
+ if ( materialType === GLTFMeshStandardSGMaterial ) {
+
+ material = extensions[ EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ].createMaterial( materialParams );
+
+ } else {
+
+ material = new materialType( materialParams );
+
+ }
+
+ if ( materialDef.name ) material.name = materialDef.name;
+
+ // baseColorTexture, emissiveTexture, and specularGlossinessTexture use sRGB encoding.
+ if ( material.map ) material.map.encoding = sRGBEncoding;
+ if ( material.emissiveMap ) material.emissiveMap.encoding = sRGBEncoding;
+
+ 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 || '' );
+
+ let name = sanitizedName;
+
+ for ( let i = 1; this.nodeNamesUsed[ name ]; ++ i ) {
+
+ name = sanitizedName + '_' + i;
+
+ }
+
+ this.nodeNamesUsed[ name ] = true;
+
+ return name;
+
+ }
+
+ /**
+ * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#geometry
+ *
+ * Creates BufferGeometries from primitives.
+ *
+ * @param {Array} primitives
+ * @return {Promise>}
+ */
+ 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 );
+
+ } );
+
+ }
+
+ const pending = [];
+
+ for ( let i = 0, il = primitives.length; i < il; i ++ ) {
+
+ const primitive = primitives[ i ];
+ const cacheKey = createPrimitiveKey( primitive );
+
+ // See if we've already created this geometry
+ const cached = cache[ cacheKey ];
+
+ if ( cached ) {
+
+ // Use the cached geometry if it exists
+ pending.push( cached.promise );
+
+ } else {
+
+ let geometryPromise;
+
+ if ( primitive.extensions && primitive.extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ] ) {
+
+ // Use DRACO geometry if available
+ geometryPromise = createDracoPrimitive( primitive );
+
+ } else {
+
+ // Otherwise create a new geometry
+ geometryPromise = addPrimitiveAttributes( new BufferGeometry(), primitive, parser );
+
+ }
+
+ // Cache this geometry
+ cache[ cacheKey ] = { primitive: 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}
+ */
+ 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 === undefined
+ ? 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 ];
+
+ // 1. create Mesh
+
+ let mesh;
+
+ const material = materials[ i ];
+
+ if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLES ||
+ primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP ||
+ primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN ||
+ primitive.mode === undefined ) {
+
+ // .isSkinnedMesh isn't in glTF spec. See ._markDefs()
+ mesh = meshDef.isSkinnedMesh === true
+ ? new SkinnedMesh( geometry, material )
+ : new Mesh( geometry, material );
+
+ if ( mesh.isSkinnedMesh === true && ! mesh.geometry.attributes.skinWeight.normalized ) {
+
+ // we normalize floating point skin weight array to fix malformed assets (see #15319)
+ // it's important to skip this for non-float32 data since normalizeSkinWeights assumes non-normalized inputs
+ mesh.normalizeSkinWeights();
+
+ }
+
+ if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP ) {
+
+ mesh.geometry = toTrianglesDrawMode( mesh.geometry, TriangleStripDrawMode );
+
+ } else if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN ) {
+
+ mesh.geometry = toTrianglesDrawMode( mesh.geometry, TriangleFanDrawMode );
+
+ }
+
+ } else if ( primitive.mode === WEBGL_CONSTANTS.LINES ) {
+
+ mesh = new LineSegments( geometry, material );
+
+ } else if ( primitive.mode === WEBGL_CONSTANTS.LINE_STRIP ) {
+
+ mesh = new Line( geometry, material );
+
+ } else if ( primitive.mode === WEBGL_CONSTANTS.LINE_LOOP ) {
+
+ mesh = new LineLoop( geometry, material );
+
+ } else if ( primitive.mode === WEBGL_CONSTANTS.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 ) {
+
+ return meshes[ 0 ];
+
+ }
+
+ const group = new Group();
+
+ 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}
+ */
+ 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