three.js 加载gltf模型的简化demo
2024-05-22 05:06:53
目录
- 前言
- 下载依赖
- 改造插件
- 主要代码
- 效果
前言
最近需要做一个three.js加载三维模型的，才发现three.js的官网和网上的示例挺乱的。甚至有人说把three.js的全部demo下载下来，替换其中的页面，学习者自己操作起来挺难的。这里我就已在vue项目中为例，介绍一下如何实现使用three.js加载三维模型。
下载依赖
npm install three --save
改造插件
three.js官网demo里提供了加载gltf模型的插件，但是这里需要改造一下
GLTFLoader.js
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';class GLTFLoader extends Loader {constructor( manager ) {super( manager );this.dracoLoader = null;this.ktx2Loader = null;this.meshoptDecoder = null;this.pluginCallbacks = [];this.register( function ( parser ) {return new GLTFMaterialsClearcoatExtension( parser );} );this.register( function ( parser ) {return new GLTFTextureBasisUExtension( parser );} );this.register( function ( parser ) {return new GLTFTextureWebPExtension( parser );} );this.register( function ( parser ) {return new GLTFMaterialsTransmissionExtension( parser );} );this.register( function ( parser ) {return new 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 systemextensions[ plugin.name ] = true;}if ( json.extensionsUsed ) {for ( let i = 0; i < json.extensionsUsed.length; ++ i ) {const extensionName = json.extensionsUsed[ i ];const extensionsRequired = json.extensionsRequired || [];switch ( extensionName ) {case EXTENSIONS.KHR_MATERIALS_UNLIT:extensions[ extensionName ] = new GLTFMaterialsUnlitExtension();break;case EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS:extensions[ extensionName ] = new GLTFMaterialsPbrSpecularGlossinessExtension();break;case EXTENSIONS.KHR_DRACO_MESH_COMPRESSION:extensions[ extensionName ] = new GLTFDracoMeshCompressionExtension( json, this.dracoLoader );break;case EXTENSIONS.KHR_TEXTURE_TRANSFORM:extensions[ extensionName ] = new GLTFTextureTransformExtension();break;case EXTENSIONS.KHR_MESH_QUANTIZATION:extensions[ extensionName ] = new GLTFMeshQuantizationExtension();break;default:if ( extensionsRequired.indexOf( extensionName ) >= 0 && plugins[ extensionName ] === undefined ) {console.warn( 'THREE.GLTFLoader: Unknown extension "' + extensionName + '".' );}}}}parser.setExtensions( extensions );parser.setPlugins( plugins );parser.parse( onLoad, onError );}}/* GLTFREGISTRY */function GLTFRegistry() {let objects = {};return {get: function ( key ) {return objects[ key ];},add: function ( key, object ) {objects[ key ] = object;},remove: function ( key ) {delete objects[ key ];},removeAll: function () {objects = {};}};}/*********************************/ /********** EXTENSIONS ***********/ /*********************************/const EXTENSIONS = {KHR_BINARY_GLTF: 'KHR_binary_glTF',KHR_DRACO_MESH_COMPRESSION: 'KHR_draco_mesh_compression',KHR_LIGHTS_PUNCTUAL: 'KHR_lights_punctual',KHR_MATERIALS_CLEARCOAT: 'KHR_materials_clearcoat',KHR_MATERIALS_IOR: 'KHR_materials_ior',KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS: 'KHR_materials_pbrSpecularGlossiness',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 cachesthis.cache = { refs: {}, uses: {} };}_markDefs() {const parser = this.parser;const nodeDefs = this.parser.json.nodes || [];for ( let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex ++ ) {const nodeDef = nodeDefs[ nodeIndex ];if ( nodeDef.extensions&& nodeDef.extensions[ this.name ]&& nodeDef.extensions[ this.name ].light !== undefined ) {parser._addNodeRef( this.cache, nodeDef.extensions[ this.name ].light );}}}_loadLight( lightIndex ) {const parser = this.parser;const cacheKey = 'light:' + lightIndex;let dependency = parser.cache.get( cacheKey );if ( dependency ) return dependency;const json = parser.json;const extensions = ( json.extensions && json.extensions[ this.name ] ) || {};const lightDefs = extensions.lights || [];const lightDef = lightDefs[ lightIndex ];let lightNode;const color = new Color( 0xffffff );if ( lightDef.color !== undefined ) color.fromArray( lightDef.color );const range = lightDef.range !== undefined ? lightDef.range : 0;switch ( lightDef.type ) {case 'directional':lightNode = new DirectionalLight( color );lightNode.target.position.set( 0, 0, - 1 );lightNode.add( lightNode.target );break;case 'point':lightNode = new PointLight( color );lightNode.distance = range;break;case 'spot':lightNode = new SpotLight( color );lightNode.distance = range;// Handle spotlight properties.lightDef.spot = lightDef.spot || {};lightDef.spot.innerConeAngle = lightDef.spot.innerConeAngle !== undefined ? lightDef.spot.innerConeAngle : 0;lightDef.spot.outerConeAngle = lightDef.spot.outerConeAngle !== undefined ? lightDef.spot.outerConeAngle : Math.PI / 4.0;lightNode.angle = lightDef.spot.outerConeAngle;lightNode.penumbra = 1.0 - lightDef.spot.innerConeAngle / lightDef.spot.outerConeAngle;lightNode.target.position.set( 0, 0, - 1 );lightNode.add( lightNode.target );break;default:throw new Error( 'THREE.GLTFLoader: Unexpected light type: ' + lightDef.type );}// Some lights (e.g. spot) default to a position other than the origin. Reset the position// here, because node-level parsing will only override position if explicitly specified.lightNode.position.set( 0, 0, 0 );lightNode.decay = 2;if ( lightDef.intensity !== undefined ) lightNode.intensity = lightDef.intensity;lightNode.name = parser.createUniqueName( lightDef.name || ( 'light_' + lightIndex ) );dependency = Promise.resolve( lightNode );parser.cache.add( cacheKey, dependency );return dependency;}createNodeAttachment( nodeIndex ) {const self = this;const parser = this.parser;const json = parser.json;const nodeDef = json.nodes[ nodeIndex ];const lightDef = ( nodeDef.extensions && nodeDef.extensions[ this.name ] ) || {};const lightIndex = lightDef.light;if ( lightIndex === undefined ) return null;return this._loadLight( lightIndex ).then( function ( light ) {return parser._getNodeRef( self.cache, lightIndex, light );} );}}/*** Unlit Materials Extension** Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_unlit*/ class GLTFMaterialsUnlitExtension {constructor() {this.name = EXTENSIONS.KHR_MATERIALS_UNLIT;}getMaterialType() {return MeshBasicMaterial;}extendParams( materialParams, materialDef, parser ) {const pending = [];materialParams.color = new Color( 1.0, 1.0, 1.0 );materialParams.opacity = 1.0;const metallicRoughness = materialDef.pbrMetallicRoughness;if ( metallicRoughness ) {if ( Array.isArray( metallicRoughness.baseColorFactor ) ) {const array = metallicRoughness.baseColorFactor;materialParams.color.fromArray( array );materialParams.opacity = array[ 3 ];}if ( metallicRoughness.baseColorTexture !== undefined ) {pending.push( parser.assignTexture( materialParams, 'map', metallicRoughness.baseColorTexture ) );}}return Promise.all( pending );}}/*** Clearcoat Materials Extension** Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_clearcoat*/ class GLTFMaterialsClearcoatExtension {constructor( parser ) {this.parser = parser;this.name = EXTENSIONS.KHR_MATERIALS_CLEARCOAT;}getMaterialType( materialIndex ) {const parser = this.parser;const materialDef = parser.json.materials[ materialIndex ];if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;return MeshPhysicalMaterial;}extendMaterialParams( materialIndex, materialParams ) {const parser = this.parser;const materialDef = parser.json.materials[ materialIndex ];if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {return Promise.resolve();}const pending = [];const extension = materialDef.extensions[ this.name ];if ( extension.clearcoatFactor !== undefined ) {materialParams.clearcoat = extension.clearcoatFactor;}if ( extension.clearcoatTexture !== undefined ) {pending.push( parser.assignTexture( materialParams, 'clearcoatMap', extension.clearcoatTexture ) );}if ( extension.clearcoatRoughnessFactor !== undefined ) {materialParams.clearcoatRoughness = extension.clearcoatRoughnessFactor;}if ( extension.clearcoatRoughnessTexture !== undefined ) {pending.push( parser.assignTexture( materialParams, 'clearcoatRoughnessMap', extension.clearcoatRoughnessTexture ) );}if ( extension.clearcoatNormalTexture !== undefined ) {pending.push( parser.assignTexture( materialParams, 'clearcoatNormalMap', extension.clearcoatNormalTexture ) );if ( extension.clearcoatNormalTexture.scale !== undefined ) {const scale = extension.clearcoatNormalTexture.scale;// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995materialParams.clearcoatNormalScale = new Vector2( scale, - scale );}}return Promise.all( pending );}}/*** Transmission Materials Extension** Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_transmission* Draft: https://github.com/KhronosGroup/glTF/pull/1698*/ class GLTFMaterialsTransmissionExtension {constructor( parser ) {this.parser = parser;this.name = EXTENSIONS.KHR_MATERIALS_TRANSMISSION;}getMaterialType( materialIndex ) {const parser = this.parser;const materialDef = parser.json.materials[ materialIndex ];if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;return MeshPhysicalMaterial;}extendMaterialParams( materialIndex, materialParams ) {const parser = this.parser;const materialDef = parser.json.materials[ materialIndex ];if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {return Promise.resolve();}const pending = [];const extension = materialDef.extensions[ this.name ];if ( extension.transmissionFactor !== undefined ) {materialParams.transmission = extension.transmissionFactor;}if ( extension.transmissionTexture !== undefined ) {pending.push( parser.assignTexture( materialParams, 'transmissionMap', extension.transmissionTexture ) );}return Promise.all( pending );}}/*** 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.attenuationTint = 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.specularTint = new Color( colorArray[ 0 ], colorArray[ 1 ], colorArray[ 2 ] );if ( extension.specularColorTexture !== undefined ) {pending.push( parser.assignTexture( materialParams, 'specularTintMap', 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 presentreturn 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 presentreturn 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/master/extensions/2.0/Khronos/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 replacingconst 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 <roughnessmap_pars_fragment>', specularMapParsFragmentChunk ).replace( '#include <metalnessmap_pars_fragment>', glossinessMapParsFragmentChunk ).replace( '#include <roughnessmap_fragment>', specularMapFragmentChunk ).replace( '#include <metalnessmap_fragment>', glossinessMapFragmentChunk ).replace( '#include <lights_physical_fragment>', 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_kconst m0 = values[ offset0 + i + stride2 ] * td; // outTangent_k * (t_k+1 - t_k)const p1 = values[ offset1 + i + stride ]; // splineVertex_k+1const 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' };/* UTILITY FUNCTIONS */function resolveURL( url, path ) {// Invalid URLif ( typeof url !== 'string' || url === '' ) return '';// Host Relative URLif ( /^https?:\/\//i.test( path ) && /^\//.test( url ) ) {path = path.replace( /(^https?:\/\/[^\/]+).*/i, '$1' );}// Absolute URL http://,https://,//if ( /^(https?:)?\/\//i.test( url ) ) return url;// Data URIif ( /^data:.*,.*$/i.test( url ) ) return url;// Blob URLif ( /^blob:.*$/i.test( url ) ) return url;// Relative URLreturn path + url;}/*** 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<GLTF.Target>} targets* @param {GLTFParser} parser* @return {Promise<BufferGeometry>}*/ 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-dataswitch ( 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 cachethis.cache = new GLTFRegistry();// associations between Three.js objects and glTF elementsthis.associations = new Map();// BufferGeometry cachingthis.primitiveCache = {};// Object3D instance cachesthis.meshCache = { refs: {}, uses: {} };this.cameraCache = { refs: {}, uses: {} };this.lightCache = { refs: {}, uses: {} };this.textureCache = {};// Track node names, to ensure no duplicatesthis.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/.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 cachethis.cache.removeAll();// Mark the special nodes/meshes in json for efficient parsethis._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();ref.name += '_instance_' + ( cache.uses[ index ] ++ );return ref;}_invokeOne( func ) {const extensions = Object.values( this.plugins );extensions.push( this );for ( let i = 0; i < extensions.length; i ++ ) {const result = func( extensions[ i ] );if ( result ) return result;}return null;}_invokeAll( func ) {const extensions = Object.values( this.plugins );extensions.unshift( this );const pending = [];for ( let i = 0; i < extensions.length; i ++ ) {const result = func( extensions[ i ] );if ( result ) pending.push( result );}return pending;}/*** Requests the specified dependency asynchronously, with caching.* @param {string} type* @param {number} index* @return {Promise<Object3D|Material|THREE.Texture|AnimationClip|ArrayBuffer|Object>}*/getDependency( type, index ) {const cacheKey = type + ':' + index;let dependency = this.cache.get( cacheKey );if ( ! dependency ) {switch ( type ) {case 'scene':dependency = this.loadScene( index );break;case 'node':dependency = this.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<Array<Object>>}*/getDependencies( type ) {let dependencies = this.cache.get( type );if ( ! dependencies ) {const parser = this;const defs = this.json[ type + ( type === 'mesh' ? 'es' : 's' ) ] || [];dependencies = Promise.all( defs.map( function ( def, index ) {return parser.getDependency( type, index );} ) );this.cache.add( type, dependencies );}return dependencies;}/*** Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views* @param {number} bufferIndex* @return {Promise<ArrayBuffer>}*/loadBuffer( bufferIndex ) {const bufferDef = this.json.buffers[ bufferIndex ];const loader = this.fileLoader;if ( bufferDef.type && bufferDef.type !== 'arraybuffer' ) {throw new Error( 'THREE.GLTFLoader: ' + bufferDef.type + ' buffer type is not supported.' );}// If 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( 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<ArrayBuffer>}*/loadBufferView( bufferViewIndex ) {const bufferViewDef = this.json.bufferViews[ bufferViewIndex ];return this.getDependency( 'buffer', bufferViewDef.buffer ).then( function ( buffer ) {const byteLength = bufferViewDef.byteLength || 0;const byteOffset = bufferViewDef.byteOffset || 0;return buffer.slice( byteOffset, byteOffset + byteLength );} );}/*** Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#accessors* @param {number} accessorIndex* @return {Promise<BufferAttribute|InterleavedBufferAttribute>}*/loadAccessor( accessorIndex ) {const parser = this;const json = this.json;const accessorDef = this.json.accessors[ accessorIndex ];if ( accessorDef.bufferView === 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 properlyconst 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-accessorsif ( 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<THREE.Texture>}*/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;let hasAlpha = true;const isJPEG = sourceURI.search( /\.jpe?g($|\?)/i ) > 0 || sourceURI.search( /^data\:image\/jpeg/ ) === 0;if ( source.mimeType === 'image/jpeg' || isJPEG ) hasAlpha = false;if ( source.bufferView !== undefined ) {// Load binary image data from bufferView, if provided.sourceURI = parser.getDependency( 'bufferView', source.bufferView ).then( function ( bufferView ) {if ( source.mimeType === 'image/png' ) {// Inspect the PNG 'IHDR' chunk to determine whether the image could have an// alpha channel. This check is conservative — the image could have an alpha// channel with all values == 1, and the indexed type (colorType == 3) only// sometimes contains alpha.//// https://en.wikipedia.org/wiki/Portable_Network_Graphics#File_headerconst colorType = new DataView( bufferView, 25, 1 ).getUint8( 0, false );hasAlpha = colorType === 6 || colorType === 4 || colorType === 3;}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( 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;// When there is definitely no alpha channel in the texture, set RGBFormat to save space.if ( ! hasAlpha ) texture.format = RGBFormat;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, {type: 'textures',index: 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<Texture>}*/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 aoMapif ( 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 useVertexTangents = 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 1pxthis.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 modifiedif ( useVertexTangents || useVertexColors || useFlatShading ) {let cacheKey = 'ClonedMaterial:' + material.uuid + ':';if ( material.isGLTFSpecularGlossinessMaterial ) cacheKey += 'specular-glossiness:';if ( useVertexTangents ) cacheKey += 'vertex-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 ( useVertexTangents ) {// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995if ( 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 geometryif ( 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<Material>}*/loadMaterial( materialIndex ) {const parser = this;const json = this.json;const extensions = this.extensions;const materialDef = json.materials[ materialIndex ];let materialType;const materialParams = {};const materialExtensions = materialDef.extensions || {};const pending = [];if ( materialExtensions[ EXTENSIONS.KHR_MATERIALS_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-materialconst 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/17706materialParams.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 ) );// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995materialParams.normalScale = new Vector2( 1, - 1 );if ( materialDef.normalTexture.scale !== undefined ) {materialParams.normalScale.set( materialDef.normalTexture.scale, - materialDef.normalTexture.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, { type: 'materials', index: 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<GLTF.Primitive>} primitives* @return {Promise<Array<BufferGeometry>>}*/loadGeometries( primitives ) {const parser = this;const extensions = this.extensions;const cache = this.primitiveCache;function createDracoPrimitive( primitive ) {return extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ].decodePrimitive( primitive, parser ).then( function ( geometry ) {return addPrimitiveAttributes( geometry, primitive, parser );} );}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 geometryconst cached = cache[ cacheKey ];if ( cached ) {// Use the cached geometry if it existspending.push( cached.promise );} else {let geometryPromise;if ( primitive.extensions && primitive.extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ] ) {// Use DRACO geometry if availablegeometryPromise = createDracoPrimitive( primitive );} else {// Otherwise create a new geometrygeometryPromise = addPrimitiveAttributes( new BufferGeometry(), primitive, parser );}// Cache this geometrycache[ 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<Group|Mesh|SkinnedMesh>}*/loadMesh( meshIndex ) {const parser = this;const json = this.json;const extensions = this.extensions;const meshDef = json.meshes[ meshIndex ];const primitives = meshDef.primitives;const pending = [];for ( let i = 0, il = primitives.length; i < il; i ++ ) {const material = primitives[ i ].material === 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 Meshlet 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 inputsmesh.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 );}if ( meshes.length === 1 ) {return meshes[ 0 ];}const group = new Group();for ( let i = 0, il = meshes.length; i < il; i ++ ) {group.add( meshes[ i ] );}return group;} );}/*** Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#cameras* @param {number} cameraIndex* @return {Promise<THREE.Camera>}*/loadCamera( cameraIndex ) {let camera;const cameraDef = this.json.cameras[ cameraIndex ];const params = cameraDef[ cameraDef.type ];if ( ! params ) {console.warn( 'THREE.GLTFLoader: Missing camera parameters.' );return;}if ( cameraDef.type === 'perspective' ) {camera = new PerspectiveCamera( MathUtils.radToDeg( params.yfov ), params.aspectRatio || 1, params.znear || 1, params.zfar || 2e6 );} else if ( cameraDef.type === 'orthographic' ) {camera = new OrthographicCamera( - params.xmag, params.xmag, params.ymag, - params.ymag, params.znear, params.zfar );}if ( cameraDef.name ) camera.name = this.createUniqueName( cameraDef.name );assignExtrasToUserData( camera, cameraDef );return Promise.resolve( camera );}/*** Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#skins* @param {number} skinIndex* @return {Promise<Object>}*/loadSkin( skinIndex ) {const skinDef = this.json.skins[ skinIndex ];const skinEntry = { joints: skinDef.joints };if ( skinDef.inverseBindMatrices === undefined ) {return Promise.resolve( skinEntry );}return this.getDependency( 'accessor', skinDef.inverseBindMatrices ).then( function ( accessor ) {skinEntry.inverseBindMatrices = accessor;return skinEntry;} );}/*** Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#animations* @param {number} animationIndex* @return {Promise<AnimationClip>}*/loadAnimation( animationIndex ) {const json = this.json;const animationDef = json.animations[ animationIndex ];const pendingNodes = [];const pendingInputAccessors = [];const pendingOutputAccessors = [];const pendingSamplers = [];const pendingTargets = [];for ( let i = 0, il = animationDef.channels.length; i < il; i ++ ) {const channel = animationDef.channels[ i ];const sampler = animationDef.samplers[ channel.sampler ];const target = channel.target;const name = target.node !== undefined ? target.node : target.id; // NOTE: target.id is deprecated.const input = animationDef.parameters !== undefined ? animationDef.parameters[ sampler.input ] : sampler.input;const output = animationDef.parameters !== undefined ? animationDef.parameters[ sampler.output ] : sampler.output;pendingNodes.push( this.getDependency( 'node', name ) );pendingInputAccessors.push( this.getDependency( 'accessor', input ) );pendingOutputAccessors.push( this.getDependency( 'accessor', output ) );pendingSamplers.push( sampler );pendingTargets.push( target );}return Promise.all( [Promise.all( pendingNodes ),Promise.all( pendingInputAccessors ),Promise.all( pendingOutputAccessors ),Promise.all( pendingSamplers ),Promise.all( pendingTargets )] ).then( function ( dependencies ) {const nodes = dependencies[ 0 ];const inputAccessors = dependencies[ 1 ];const outputAccessors = dependencies[ 2 ];const samplers = dependencies[ 3 ];const targets = dependencies[ 4 ];const tracks = [];for ( let i = 0, il = nodes.length; i < il; i ++ ) {const node = nodes[ i ];const inputAccessor = inputAccessors[ i ];const outputAccessor = outputAccessors[ i ];const sampler = samplers[ i ];const target = targets[ i ];if ( node === undefined ) continue;node.updateMatrix();node.matrixAutoUpdate = true;let TypedKeyframeTrack;switch ( PATH_PROPERTIES[ target.path ] ) {case PATH_PROPERTIES.weights:TypedKeyframeTrack = NumberKeyframeTrack;break;case PATH_PROPERTIES.rotation:TypedKeyframeTrack = QuaternionKeyframeTrack;break;case PATH_PROPERTIES.position:case PATH_PROPERTIES.scale:default:TypedKeyframeTrack = VectorKeyframeTrack;break;}const targetName = node.name ? node.name : node.uuid;const interpolation = sampler.interpolation !== undefined ? INTERPOLATION[ sampler.interpolation ] : InterpolateLinear;const targetNames = [];if ( PATH_PROPERTIES[ target.path ] === PATH_PROPERTIES.weights ) {// Node may be a Group (glTF mesh with several primitives) or a Mesh.node.traverse( function ( object ) {if ( object.isMesh === true && object.morphTargetInfluences ) {targetNames.push( object.name ? object.name : object.uuid );}} );} else {targetNames.push( targetName );}let outputArray = outputAccessor.array;if ( outputAccessor.normalized ) {const scale = getNormalizedComponentScale( outputArray.constructor );const scaled = new Float32Array( outputArray.length );for ( let j = 0, jl = outputArray.length; j < jl; j ++ ) {scaled[ j ] = outputArray[ j ] * scale;}outputArray = scaled;}for ( let j = 0, jl = targetNames.length; j < jl; j ++ ) {const track = new TypedKeyframeTrack(targetNames[ j ] + '.' + PATH_PROPERTIES[ target.path ],inputAccessor.array,outputArray,interpolation);// Override interpolation with custom factory method.if ( sampler.interpolation === 'CUBICSPLINE' ) {track.createInterpolant = function InterpolantFactoryMethodGLTFCubicSpline( result ) {// A CUBICSPLINE keyframe in glTF has three output values for each input value,// representing inTangent, splineVertex, and outTangent. As a result, track.getValueSize()// must be divided by three to get the interpolant's sampleSize argument.const interpolantType = ( this instanceof QuaternionKeyframeTrack ) ? GLTFCubicSplineQuaternionInterpolant : GLTFCubicSplineInterpolant;return new interpolantType( this.times, this.values, this.getValueSize() / 3, result );};// Mark as CUBICSPLINE. `track.getInterpolation()` doesn't support custom interpolants.track.createInterpolant.isInterpolantFactoryMethodGLTFCubicSpline = true;}tracks.push( track );}}const name = animationDef.name ? animationDef.name : 'animation_' + animationIndex;return new AnimationClip( name, undefined, tracks );} );}createNodeMesh( nodeIndex ) {const json = this.json;const parser = this;const nodeDef = json.nodes[ nodeIndex ];if ( nodeDef.mesh === undefined ) return null;return parser.getDependency( 'mesh', nodeDef.mesh ).then( function ( mesh ) {const node = parser._getNodeRef( parser.meshCache, nodeDef.mesh, mesh );// if weights are provided on the node, override weights on the mesh.if ( nodeDef.weights !== undefined ) {node.traverse( function ( o ) {if ( ! o.isMesh ) return;for ( let i = 0, il = nodeDef.weights.length; i < il; i ++ ) {o.morphTargetInfluences[ i ] = nodeDef.weights[ i ];}} );}return node;} );}/*** Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#nodes-and-hierarchy* @param {number} nodeIndex* @return {Promise<Object3D>}*/loadNode( nodeIndex ) {const json = this.json;const extensions = this.extensions;const parser = this;const nodeDef = json.nodes[ nodeIndex ];// reserve node's name before its dependencies, so the root has the intended name.const nodeName = nodeDef.name ? parser.createUniqueName( nodeDef.name ) : '';return ( function () {const pending = [];const meshPromise = parser._invokeOne( function ( ext ) {return ext.createNodeMesh && ext.createNodeMesh( nodeIndex );} );if ( meshPromise ) {pending.push( meshPromise );}if ( nodeDef.camera !== undefined ) {pending.push( parser.getDependency( 'camera', nodeDef.camera ).then( function ( camera ) {return parser._getNodeRef( parser.cameraCache, nodeDef.camera, camera );} ) );}parser._invokeAll( function ( ext ) {return ext.createNodeAttachment && ext.createNodeAttachment( nodeIndex );} ).forEach( function ( promise ) {pending.push( promise );} );return Promise.all( pending );}() ).then( function ( objects ) {let node;// .isBone isn't in glTF spec. See ._markDefsif ( nodeDef.isBone === true ) {node = new Bone();} else if ( objects.length > 1 ) {node = new Group();} else if ( objects.length === 1 ) {node = objects[ 0 ];} else {node = new Object3D();}if ( node !== objects[ 0 ] ) {for ( let i = 0, il = objects.length; i < il; i ++ ) {node.add( objects[ i ] );}}if ( nodeDef.name ) {node.userData.name = nodeDef.name;node.name = nodeName;}assignExtrasToUserData( node, nodeDef );if ( nodeDef.extensions ) addUnknownExtensionsToUserData( extensions, node, nodeDef );if ( nodeDef.matrix !== undefined ) {const matrix = new Matrix4();matrix.fromArray( nodeDef.matrix );node.applyMatrix4( matrix );} else {if ( nodeDef.translation !== undefined ) {node.position.fromArray( nodeDef.translation );}if ( nodeDef.rotation !== undefined ) {node.quaternion.fromArray( nodeDef.rotation );}if ( nodeDef.scale !== undefined ) {node.scale.fromArray( nodeDef.scale );}}parser.associations.set( node, { type: 'nodes', index: nodeIndex } );return node;} );}/*** Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes* @param {number} sceneIndex* @return {Promise<Group>}*/loadScene( sceneIndex ) {const json = this.json;const extensions = this.extensions;const sceneDef = this.json.scenes[ sceneIndex ];const parser = this;// Loader returns Group, not Scene.// See: https://github.com/mrdoob/three.js/issues/18342#issuecomment-578981172const scene = new Group();if ( sceneDef.name ) scene.name = parser.createUniqueName( sceneDef.name );assignExtrasToUserData( scene, sceneDef );if ( sceneDef.extensions ) addUnknownExtensionsToUserData( extensions, scene, sceneDef );const nodeIds = sceneDef.nodes || [];const pending = [];for ( let i = 0, il = nodeIds.length; i < il; i ++ ) {pending.push( buildNodeHierachy( nodeIds[ i ], scene, json, parser ) );}return Promise.all( pending ).then( function () {return scene;} );}}function buildNodeHierachy( nodeId, parentObject, json, parser ) {const nodeDef = json.nodes[ nodeId ];return parser.getDependency( 'node', nodeId ).then( function ( node ) {if ( nodeDef.skin === undefined ) return node;// build skeleton here as welllet skinEntry;return parser.getDependency( 'skin', nodeDef.skin ).then( function ( skin ) {skinEntry = skin;const pendingJoints = [];for ( let i = 0, il = skinEntry.joints.length; i < il; i ++ ) {pendingJoints.push( parser.getDependency( 'node', skinEntry.joints[ i ] ) );}return Promise.all( pendingJoints );} ).then( function ( jointNodes ) {node.traverse( function ( mesh ) {if ( ! mesh.isMesh ) return;const bones = [];const boneInverses = [];for ( let j = 0, jl = jointNodes.length; j < jl; j ++ ) {const jointNode = jointNodes[ j ];if ( jointNode ) {bones.push( jointNode );const mat = new Matrix4();if ( skinEntry.inverseBindMatrices !== undefined ) {mat.fromArray( skinEntry.inverseBindMatrices.array, j * 16 );}boneInverses.push( mat );} else {console.warn( 'THREE.GLTFLoader: Joint "%s" could not be found.', skinEntry.joints[ j ] );}}mesh.bind( new Skeleton( bones, boneInverses ), mesh.matrixWorld );} );return node;} );} ).then( function ( node ) {// build node hierachyparentObject.add( node );const pending = [];if ( nodeDef.children ) {const children = nodeDef.children;for ( let i = 0, il = children.length; i < il; i ++ ) {const child = children[ i ];pending.push( buildNodeHierachy( child, node, json, parser ) );}}return Promise.all( pending );} );}/*** @param {BufferGeometry} geometry* @param {GLTF.Primitive} primitiveDef* @param {GLTFParser} parser*/ function computeBounds( geometry, primitiveDef, parser ) {const attributes = primitiveDef.attributes;const box = new Box3();if ( attributes.POSITION !== undefined ) {const accessor = parser.json.accessors[ attributes.POSITION ];const min = accessor.min;const max = accessor.max;// glTF requires 'min' and 'max', but VRM (which extends glTF) currently ignores that requirement.if ( min !== undefined && max !== undefined ) {box.set(new Vector3( min[ 0 ], min[ 1 ], min[ 2 ] ),new Vector3( max[ 0 ], max[ 1 ], max[ 2 ] ));if ( accessor.normalized ) {const boxScale = getNormalizedComponentScale( WEBGL_COMPONENT_TYPES[ accessor.componentType ] );box.min.multiplyScalar( boxScale );box.max.multiplyScalar( boxScale );}} else {console.warn( 'THREE.GLTFLoader: Missing min/max properties for accessor POSITION.' );return;}} else {return;}const targets = primitiveDef.targets;if ( targets !== undefined ) {const maxDisplacement = new Vector3();const vector = new Vector3();for ( let i = 0, il = targets.length; i < il; i ++ ) {const target = targets[ i ];if ( target.POSITION !== undefined ) {const accessor = parser.json.accessors[ target.POSITION ];const min = accessor.min;const max = accessor.max;// glTF requires 'min' and 'max', but VRM (which extends glTF) currently ignores that requirement.if ( min !== undefined && max !== undefined ) {// we need to get max of absolute components because target weight is [-1,1]vector.setX( Math.max( Math.abs( min[ 0 ] ), Math.abs( max[ 0 ] ) ) );vector.setY( Math.max( Math.abs( min[ 1 ] ), Math.abs( max[ 1 ] ) ) );vector.setZ( Math.max( Math.abs( min[ 2 ] ), Math.abs( max[ 2 ] ) ) );if ( accessor.normalized ) {const boxScale = getNormalizedComponentScale( WEBGL_COMPONENT_TYPES[ accessor.componentType ] );vector.multiplyScalar( boxScale );}// Note: this assumes that the sum of all weights is at most 1. This isn't quite correct - it's more conservative// to assume that each target can have a max weight of 1. However, for some use cases - notably, when morph targets// are used to implement key-frame animations and as such only two are active at a time - this results in very large// boxes. So for now we make a box that's sometimes a touch too small but is hopefully mostly of reasonable size.maxDisplacement.max( vector );} else {console.warn( 'THREE.GLTFLoader: Missing min/max properties for accessor POSITION.' );}}}// As per comment above this box isn't conservative, but has a reasonable size for a very large number of morph targets.box.expandByVector( maxDisplacement );}geometry.boundingBox = box;const sphere = new Sphere();box.getCenter( sphere.center );sphere.radius = box.min.distanceTo( box.max ) / 2;geometry.boundingSphere = sphere;}/*** @param {BufferGeometry} geometry* @param {GLTF.Primitive} primitiveDef* @param {GLTFParser} parser* @return {Promise<BufferGeometry>}*/ function addPrimitiveAttributes( geometry, primitiveDef, parser ) {const attributes = primitiveDef.attributes;const pending = [];function assignAttributeAccessor( accessorIndex, attributeName ) {return parser.getDependency( 'accessor', accessorIndex ).then( function ( accessor ) {geometry.setAttribute( attributeName, accessor );} );}for ( const gltfAttributeName in attributes ) {const threeAttributeName = ATTRIBUTES[ gltfAttributeName ] || gltfAttributeName.toLowerCase();// Skip attributes already provided by e.g. Draco extension.if ( threeAttributeName in geometry.attributes ) continue;pending.push( assignAttributeAccessor( attributes[ gltfAttributeName ], threeAttributeName ) );}if ( primitiveDef.indices !== undefined && ! geometry.index ) {const accessor = parser.getDependency( 'accessor', primitiveDef.indices ).then( function ( accessor ) {geometry.setIndex( accessor );} );pending.push( accessor );}assignExtrasToUserData( geometry, primitiveDef );computeBounds( geometry, primitiveDef, parser );return Promise.all( pending ).then( function () {return primitiveDef.targets !== undefined? addMorphTargets( geometry, primitiveDef.targets, parser ): geometry;} );}/*** @param {BufferGeometry} geometry* @param {Number} drawMode* @return {BufferGeometry}*/ function toTrianglesDrawMode( geometry, drawMode ) {let index = geometry.getIndex();// generate index if not presentif ( index === null ) {const indices = [];const position = geometry.getAttribute( 'position' );if ( position !== undefined ) {for ( let i = 0; i < position.count; i ++ ) {indices.push( i );}geometry.setIndex( indices );index = geometry.getIndex();} else {console.error( 'THREE.GLTFLoader.toTrianglesDrawMode(): Undefined position attribute. Processing not possible.' );return geometry;}}//const numberOfTriangles = index.count - 2;const newIndices = [];if ( drawMode === TriangleFanDrawMode ) {// gl.TRIANGLE_FANfor ( let i = 1; i <= numberOfTriangles; i ++ ) {newIndices.push( index.getX( 0 ) );newIndices.push( index.getX( i ) );newIndices.push( index.getX( i + 1 ) );}} else {// gl.TRIANGLE_STRIPfor ( let i = 0; i < numberOfTriangles; i ++ ) {if ( i % 2 === 0 ) {newIndices.push( index.getX( i ) );newIndices.push( index.getX( i + 1 ) );newIndices.push( index.getX( i + 2 ) );} else {newIndices.push( index.getX( i + 2 ) );newIndices.push( index.getX( i + 1 ) );newIndices.push( index.getX( i ) );}}}if ( ( newIndices.length / 3 ) !== numberOfTriangles ) {console.error( 'THREE.GLTFLoader.toTrianglesDrawMode(): Unable to generate correct amount of triangles.' );}// build final geometryconst newGeometry = geometry.clone();newGeometry.setIndex( newIndices );return newGeometry;}export { GLTFLoader };OrbitControls.js (用来控制三维场景的旋转，方便找到模型)
import * as THREE from 'three'// Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).//// Orbit - left mouse / touch: one-finger move// Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish// Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger moveconst _changeEvent = {type: 'change'};const _startEvent = {type: 'start'};const _endEvent = {type: 'end'};class OrbitControls extends THREE.EventDispatcher {constructor( object, domElement ) {super();if ( domElement === undefined ) console.warn( 'THREE.OrbitControls: The second parameter "domElement" is now mandatory.' );if ( domElement === document ) console.error( 'THREE.OrbitControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.' );this.object = object;this.domElement = domElement;this.domElement.style.touchAction = 'none'; // disable touch scroll// Set to false to disable this controlthis.enabled = true; // "target" sets the location of focus, where the object orbits aroundthis.target = new THREE.Vector3(); // How far you can dolly in and out ( PerspectiveCamera only )this.minDistance = 0;this.maxDistance = Infinity; // How far you can zoom in and out ( OrthographicCamera only )this.minZoom = 0;this.maxZoom = Infinity; // How far you can orbit vertically, upper and lower limits.// Range is 0 to Math.PI radians.this.minPolarAngle = 0; // radiansthis.maxPolarAngle = Math.PI; // radians// How far you can orbit horizontally, upper and lower limits.// If set, the interval [ min, max ] must be a sub-interval of [ - 2 PI, 2 PI ], with ( max - min < 2 PI )this.minAzimuthAngle = - Infinity; // radiansthis.maxAzimuthAngle = Infinity; // radians// Set to true to enable damping (inertia)// If damping is enabled, you must call controls.update() in your animation loopthis.enableDamping = false;this.dampingFactor = 0.05; // This option actually enables dollying in and out; left as "zoom" for backwards compatibility.// Set to false to disable zoomingthis.enableZoom = true;this.zoomSpeed = 1.0; // Set to false to disable rotatingthis.enableRotate = true;this.rotateSpeed = 1.0; // Set to false to disable panningthis.enablePan = true;this.panSpeed = 1.0;this.screenSpacePanning = true; // if false, pan orthogonal to world-space direction camera.upthis.keyPanSpeed = 7.0; // pixels moved per arrow key push// Set to true to automatically rotate around the target// If auto-rotate is enabled, you must call controls.update() in your animation loopthis.autoRotate = false;this.autoRotateSpeed = 2.0; // 30 seconds per orbit when fps is 60// The four arrow keysthis.keys = {LEFT: 'ArrowLeft',UP: 'ArrowUp',RIGHT: 'ArrowRight',BOTTOM: 'ArrowDown'}; // Mouse buttonsthis.mouseButtons = {LEFT: THREE.MOUSE.ROTATE,MIDDLE: THREE.MOUSE.DOLLY,RIGHT: THREE.MOUSE.PAN}; // Touch fingersthis.touches = {ONE: THREE.TOUCH.ROTATE,TWO: THREE.TOUCH.DOLLY_PAN}; // for resetthis.target0 = this.target.clone();this.position0 = this.object.position.clone();this.zoom0 = this.object.zoom; // the target DOM element for key eventsthis._domElementKeyEvents = null; //// public methods//this.getPolarAngle = function () {return spherical.phi;};this.getAzimuthalAngle = function () {return spherical.theta;};this.getDistance = function () {return this.object.position.distanceTo( this.target );};this.listenToKeyEvents = function ( domElement ) {domElement.addEventListener( 'keydown', onKeyDown );this._domElementKeyEvents = domElement;};this.saveState = function () {scope.target0.copy( scope.target );scope.position0.copy( scope.object.position );scope.zoom0 = scope.object.zoom;};this.reset = function () {scope.target.copy( scope.target0 );scope.object.position.copy( scope.position0 );scope.object.zoom = scope.zoom0;scope.object.updateProjectionMatrix();scope.dispatchEvent( _changeEvent );scope.update();state = STATE.NONE;}; // this method is exposed, but perhaps it would be better if we can make it private...this.update = function () {const offset = new THREE.Vector3(); // so camera.up is the orbit axisconst quat = new THREE.Quaternion().setFromUnitVectors( object.up, new THREE.Vector3( 0, 1, 0 ) );const quatInverse = quat.clone().invert();const lastPosition = new THREE.Vector3();const lastQuaternion = new THREE.Quaternion();const twoPI = 2 * Math.PI;return function update() {const position = scope.object.position;offset.copy( position ).sub( scope.target ); // rotate offset to "y-axis-is-up" spaceoffset.applyQuaternion( quat ); // angle from z-axis around y-axisspherical.setFromVector3( offset );if ( scope.autoRotate && state === STATE.NONE ) {rotateLeft( getAutoRotationAngle() );}if ( scope.enableDamping ) {spherical.theta += sphericalDelta.theta * scope.dampingFactor;spherical.phi += sphericalDelta.phi * scope.dampingFactor;} else {spherical.theta += sphericalDelta.theta;spherical.phi += sphericalDelta.phi;} // restrict theta to be between desired limitslet min = scope.minAzimuthAngle;let max = scope.maxAzimuthAngle;if ( isFinite( min ) && isFinite( max ) ) {if ( min < - Math.PI ) min += twoPI; else if ( min > Math.PI ) min -= twoPI;if ( max < - Math.PI ) max += twoPI; else if ( max > Math.PI ) max -= twoPI;if ( min <= max ) {spherical.theta = Math.max( min, Math.min( max, spherical.theta ) );} else {spherical.theta = spherical.theta > ( min + max ) / 2 ? Math.max( min, spherical.theta ) : Math.min( max, spherical.theta );}} // restrict phi to be between desired limitsspherical.phi = Math.max( scope.minPolarAngle, Math.min( scope.maxPolarAngle, spherical.phi ) );spherical.makeSafe();spherical.radius *= scale; // restrict radius to be between desired limitsspherical.radius = Math.max( scope.minDistance, Math.min( scope.maxDistance, spherical.radius ) ); // move target to panned locationif ( scope.enableDamping === true ) {scope.target.addScaledVector( panOffset, scope.dampingFactor );} else {scope.target.add( panOffset );}offset.setFromSpherical( spherical ); // rotate offset back to "camera-up-vector-is-up" spaceoffset.applyQuaternion( quatInverse );position.copy( scope.target ).add( offset );scope.object.lookAt( scope.target );if ( scope.enableDamping === true ) {sphericalDelta.theta *= 1 - scope.dampingFactor;sphericalDelta.phi *= 1 - scope.dampingFactor;panOffset.multiplyScalar( 1 - scope.dampingFactor );} else {sphericalDelta.set( 0, 0, 0 );panOffset.set( 0, 0, 0 );}scale = 1; // update condition is:// min(camera displacement, camera rotation in radians)^2 > EPS// using small-angle approximation cos(x/2) = 1 - x^2 / 8if ( zoomChanged || lastPosition.distanceToSquared( scope.object.position ) > EPS || 8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ) {scope.dispatchEvent( _changeEvent );lastPosition.copy( scope.object.position );lastQuaternion.copy( scope.object.quaternion );zoomChanged = false;return true;}return false;};}();this.dispose = function () {scope.domElement.removeEventListener( 'contextmenu', onContextMenu );scope.domElement.removeEventListener( 'pointerdown', onPointerDown );scope.domElement.removeEventListener( 'pointercancel', onPointerCancel );scope.domElement.removeEventListener( 'wheel', onMouseWheel );scope.domElement.removeEventListener( 'pointermove', onPointerMove );scope.domElement.removeEventListener( 'pointerup', onPointerUp );if ( scope._domElementKeyEvents !== null ) {scope._domElementKeyEvents.removeEventListener( 'keydown', onKeyDown );} //scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?}; //// internals//const scope = this;const STATE = {NONE: - 1,ROTATE: 0,DOLLY: 1,PAN: 2,TOUCH_ROTATE: 3,TOUCH_PAN: 4,TOUCH_DOLLY_PAN: 5,TOUCH_DOLLY_ROTATE: 6};let state = STATE.NONE;const EPS = 0.000001; // current position in spherical coordinatesconst spherical = new THREE.Spherical();const sphericalDelta = new THREE.Spherical();let scale = 1;const panOffset = new THREE.Vector3();let zoomChanged = false;const rotateStart = new THREE.Vector2();const rotateEnd = new THREE.Vector2();const rotateDelta = new THREE.Vector2();const panStart = new THREE.Vector2();const panEnd = new THREE.Vector2();const panDelta = new THREE.Vector2();const dollyStart = new THREE.Vector2();const dollyEnd = new THREE.Vector2();const dollyDelta = new THREE.Vector2();const pointers = [];const pointerPositions = {};function getAutoRotationAngle() {return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;}function getZoomScale() {return Math.pow( 0.95, scope.zoomSpeed );}function rotateLeft( angle ) {sphericalDelta.theta -= angle;}function rotateUp( angle ) {sphericalDelta.phi -= angle;}const panLeft = function () {const v = new THREE.Vector3();return function panLeft( distance, objectMatrix ) {v.setFromMatrixColumn( objectMatrix, 0 ); // get X column of objectMatrixv.multiplyScalar( - distance );panOffset.add( v );};}();const panUp = function () {const v = new THREE.Vector3();return function panUp( distance, objectMatrix ) {if ( scope.screenSpacePanning === true ) {v.setFromMatrixColumn( objectMatrix, 1 );} else {v.setFromMatrixColumn( objectMatrix, 0 );v.crossVectors( scope.object.up, v );}v.multiplyScalar( distance );panOffset.add( v );};}(); // deltaX and deltaY are in pixels; right and down are positiveconst pan = function () {const offset = new THREE.Vector3();return function pan( deltaX, deltaY ) {const element = scope.domElement;if ( scope.object.isPerspectiveCamera ) {// perspectiveconst position = scope.object.position;offset.copy( position ).sub( scope.target );let targetDistance = offset.length(); // half of the fov is center to top of screentargetDistance *= Math.tan( scope.object.fov / 2 * Math.PI / 180.0 ); // we use only clientHeight here so aspect ratio does not distort speedpanLeft( 2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix );panUp( 2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix );} else if ( scope.object.isOrthographicCamera ) {// orthographicpanLeft( deltaX * ( scope.object.right - scope.object.left ) / scope.object.zoom / element.clientWidth, scope.object.matrix );panUp( deltaY * ( scope.object.top - scope.object.bottom ) / scope.object.zoom / element.clientHeight, scope.object.matrix );} else {// camera neither orthographic nor perspectiveconsole.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.' );scope.enablePan = false;}};}();function dollyOut( dollyScale ) {if ( scope.object.isPerspectiveCamera ) {scale /= dollyScale;} else if ( scope.object.isOrthographicCamera ) {scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom * dollyScale ) );scope.object.updateProjectionMatrix();zoomChanged = true;} else {console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );scope.enableZoom = false;}}function dollyIn( dollyScale ) {if ( scope.object.isPerspectiveCamera ) {scale *= dollyScale;} else if ( scope.object.isOrthographicCamera ) {scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom / dollyScale ) );scope.object.updateProjectionMatrix();zoomChanged = true;} else {console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );scope.enableZoom = false;}} //// event callbacks - update the object state//function handleMouseDownRotate( event ) {rotateStart.set( event.clientX, event.clientY );}function handleMouseDownDolly( event ) {dollyStart.set( event.clientX, event.clientY );}function handleMouseDownPan( event ) {panStart.set( event.clientX, event.clientY );}function handleMouseMoveRotate( event ) {rotateEnd.set( event.clientX, event.clientY );rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );const element = scope.domElement;rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, heightrotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );rotateStart.copy( rotateEnd );scope.update();}function handleMouseMoveDolly( event ) {dollyEnd.set( event.clientX, event.clientY );dollyDelta.subVectors( dollyEnd, dollyStart );if ( dollyDelta.y > 0 ) {dollyOut( getZoomScale() );} else if ( dollyDelta.y < 0 ) {dollyIn( getZoomScale() );}dollyStart.copy( dollyEnd );scope.update();}function handleMouseMovePan( event ) {panEnd.set( event.clientX, event.clientY );panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );pan( panDelta.x, panDelta.y );panStart.copy( panEnd );scope.update();}function handleMouseUp() { // no-op}function handleMouseWheel( event ) {if ( event.deltaY < 0 ) {dollyIn( getZoomScale() );} else if ( event.deltaY > 0 ) {dollyOut( getZoomScale() );}scope.update();}function handleKeyDown( event ) {let needsUpdate = false;switch ( event.code ) {case scope.keys.UP:pan( 0, scope.keyPanSpeed );needsUpdate = true;break;case scope.keys.BOTTOM:pan( 0, - scope.keyPanSpeed );needsUpdate = true;break;case scope.keys.LEFT:pan( scope.keyPanSpeed, 0 );needsUpdate = true;break;case scope.keys.RIGHT:pan( - scope.keyPanSpeed, 0 );needsUpdate = true;break;}if ( needsUpdate ) {// prevent the browser from scrolling on cursor keysevent.preventDefault();scope.update();}}function handleTouchStartRotate() {if ( pointers.length === 1 ) {rotateStart.set( pointers[ 0 ].pageX, pointers[ 0 ].pageY );} else {const x = 0.5 * ( pointers[ 0 ].pageX + pointers[ 1 ].pageX );const y = 0.5 * ( pointers[ 0 ].pageY + pointers[ 1 ].pageY );rotateStart.set( x, y );}}function handleTouchStartPan() {if ( pointers.length === 1 ) {panStart.set( pointers[ 0 ].pageX, pointers[ 0 ].pageY );} else {const x = 0.5 * ( pointers[ 0 ].pageX + pointers[ 1 ].pageX );const y = 0.5 * ( pointers[ 0 ].pageY + pointers[ 1 ].pageY );panStart.set( x, y );}}function handleTouchStartDolly() {const dx = pointers[ 0 ].pageX - pointers[ 1 ].pageX;const dy = pointers[ 0 ].pageY - pointers[ 1 ].pageY;const distance = Math.sqrt( dx * dx + dy * dy );dollyStart.set( 0, distance );}function handleTouchStartDollyPan() {if ( scope.enableZoom ) handleTouchStartDolly();if ( scope.enablePan ) handleTouchStartPan();}function handleTouchStartDollyRotate() {if ( scope.enableZoom ) handleTouchStartDolly();if ( scope.enableRotate ) handleTouchStartRotate();}function handleTouchMoveRotate( event ) {if ( pointers.length == 1 ) {rotateEnd.set( event.pageX, event.pageY );} else {const position = getSecondPointerPosition( event );const x = 0.5 * ( event.pageX + position.x );const y = 0.5 * ( event.pageY + position.y );rotateEnd.set( x, y );}rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );const element = scope.domElement;rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, heightrotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );rotateStart.copy( rotateEnd );}function handleTouchMovePan( event ) {if ( pointers.length === 1 ) {panEnd.set( event.pageX, event.pageY );} else {const position = getSecondPointerPosition( event );const x = 0.5 * ( event.pageX + position.x );const y = 0.5 * ( event.pageY + position.y );panEnd.set( x, y );}panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );pan( panDelta.x, panDelta.y );panStart.copy( panEnd );}function handleTouchMoveDolly( event ) {const position = getSecondPointerPosition( event );const dx = event.pageX - position.x;const dy = event.pageY - position.y;const distance = Math.sqrt( dx * dx + dy * dy );dollyEnd.set( 0, distance );dollyDelta.set( 0, Math.pow( dollyEnd.y / dollyStart.y, scope.zoomSpeed ) );dollyOut( dollyDelta.y );dollyStart.copy( dollyEnd );}function handleTouchMoveDollyPan( event ) {if ( scope.enableZoom ) handleTouchMoveDolly( event );if ( scope.enablePan ) handleTouchMovePan( event );}function handleTouchMoveDollyRotate( event ) {if ( scope.enableZoom ) handleTouchMoveDolly( event );if ( scope.enableRotate ) handleTouchMoveRotate( event );}function handleTouchEnd() { // no-op} //// event handlers - FSM: listen for events and reset state//function onPointerDown( event ) {if ( scope.enabled === false ) return;if ( pointers.length === 0 ) {scope.domElement.setPointerCapture( event.pointerId );scope.domElement.addEventListener( 'pointermove', onPointerMove );scope.domElement.addEventListener( 'pointerup', onPointerUp );} //addPointer( event );if ( event.pointerType === 'touch' ) {onTouchStart( event );} else {onMouseDown( event );}}function onPointerMove( event ) {if ( scope.enabled === false ) return;if ( event.pointerType === 'touch' ) {onTouchMove( event );} else {onMouseMove( event );}}function onPointerUp( event ) {if ( scope.enabled === false ) return;if ( event.pointerType === 'touch' ) {onTouchEnd();} else {onMouseUp( event );}removePointer( event ); //if ( pointers.length === 0 ) {scope.domElement.releasePointerCapture( event.pointerId );scope.domElement.removeEventListener( 'pointermove', onPointerMove );scope.domElement.removeEventListener( 'pointerup', onPointerUp );}}function onPointerCancel( event ) {removePointer( event );}function onMouseDown( event ) {let mouseAction;switch ( event.button ) {case 0:mouseAction = scope.mouseButtons.LEFT;break;case 1:mouseAction = scope.mouseButtons.MIDDLE;break;case 2:mouseAction = scope.mouseButtons.RIGHT;break;default:mouseAction = - 1;}switch ( mouseAction ) {case THREE.MOUSE.DOLLY:if ( scope.enableZoom === false ) return;handleMouseDownDolly( event );state = STATE.DOLLY;break;case THREE.MOUSE.ROTATE:if ( event.ctrlKey || event.metaKey || event.shiftKey ) {if ( scope.enablePan === false ) return;handleMouseDownPan( event );state = STATE.PAN;} else {if ( scope.enableRotate === false ) return;handleMouseDownRotate( event );state = STATE.ROTATE;}break;case THREE.MOUSE.PAN:if ( event.ctrlKey || event.metaKey || event.shiftKey ) {if ( scope.enableRotate === false ) return;handleMouseDownRotate( event );state = STATE.ROTATE;} else {if ( scope.enablePan === false ) return;handleMouseDownPan( event );state = STATE.PAN;}break;default:state = STATE.NONE;}if ( state !== STATE.NONE ) {scope.dispatchEvent( _startEvent );}}function onMouseMove( event ) {if ( scope.enabled === false ) return;switch ( state ) {case STATE.ROTATE:if ( scope.enableRotate === false ) return;handleMouseMoveRotate( event );break;case STATE.DOLLY:if ( scope.enableZoom === false ) return;handleMouseMoveDolly( event );break;case STATE.PAN:if ( scope.enablePan === false ) return;handleMouseMovePan( event );break;}}function onMouseUp( event ) {handleMouseUp( event );scope.dispatchEvent( _endEvent );state = STATE.NONE;}function onMouseWheel( event ) {if ( scope.enabled === false || scope.enableZoom === false || state !== STATE.NONE && state !== STATE.ROTATE ) return;event.preventDefault();scope.dispatchEvent( _startEvent );handleMouseWheel( event );scope.dispatchEvent( _endEvent );}function onKeyDown( event ) {if ( scope.enabled === false || scope.enablePan === false ) return;handleKeyDown( event );}function onTouchStart( event ) {trackPointer( event );switch ( pointers.length ) {case 1:switch ( scope.touches.ONE ) {case THREE.TOUCH.ROTATE:if ( scope.enableRotate === false ) return;handleTouchStartRotate();state = STATE.TOUCH_ROTATE;break;case THREE.TOUCH.PAN:if ( scope.enablePan === false ) return;handleTouchStartPan();state = STATE.TOUCH_PAN;break;default:state = STATE.NONE;}break;case 2:switch ( scope.touches.TWO ) {case THREE.TOUCH.DOLLY_PAN:if ( scope.enableZoom === false && scope.enablePan === false ) return;handleTouchStartDollyPan();state = STATE.TOUCH_DOLLY_PAN;break;case THREE.TOUCH.DOLLY_ROTATE:if ( scope.enableZoom === false && scope.enableRotate === false ) return;handleTouchStartDollyRotate();state = STATE.TOUCH_DOLLY_ROTATE;break;default:state = STATE.NONE;}break;default:state = STATE.NONE;}if ( state !== STATE.NONE ) {scope.dispatchEvent( _startEvent );}}function onTouchMove( event ) {trackPointer( event );switch ( state ) {case STATE.TOUCH_ROTATE:if ( scope.enableRotate === false ) return;handleTouchMoveRotate( event );scope.update();break;case STATE.TOUCH_PAN:if ( scope.enablePan === false ) return;handleTouchMovePan( event );scope.update();break;case STATE.TOUCH_DOLLY_PAN:if ( scope.enableZoom === false && scope.enablePan === false ) return;handleTouchMoveDollyPan( event );scope.update();break;case STATE.TOUCH_DOLLY_ROTATE:if ( scope.enableZoom === false && scope.enableRotate === false ) return;handleTouchMoveDollyRotate( event );scope.update();break;default:state = STATE.NONE;}}function onTouchEnd( event ) {handleTouchEnd( event );scope.dispatchEvent( _endEvent );state = STATE.NONE;}function onContextMenu( event ) {if ( scope.enabled === false ) return;event.preventDefault();}function addPointer( event ) {pointers.push( event );}function removePointer( event ) {delete pointerPositions[ event.pointerId ];for ( let i = 0; i < pointers.length; i ++ ) {if ( pointers[ i ].pointerId == event.pointerId ) {pointers.splice( i, 1 );return;}}}function trackPointer( event ) {let position = pointerPositions[ event.pointerId ];if ( position === undefined ) {position = new THREE.Vector2();pointerPositions[ event.pointerId ] = position;}position.set( event.pageX, event.pageY );}function getSecondPointerPosition( event ) {const pointer = event.pointerId === pointers[ 0 ].pointerId ? pointers[ 1 ] : pointers[ 0 ];return pointerPositions[ pointer.pointerId ];} //scope.domElement.addEventListener( 'contextmenu', onContextMenu );scope.domElement.addEventListener( 'pointerdown', onPointerDown );scope.domElement.addEventListener( 'pointercancel', onPointerCancel );scope.domElement.addEventListener( 'wheel', onMouseWheel, {passive: false} ); // force an update at startthis.update();}} class MapControls extends OrbitControls {constructor( object, domElement ) {super( object, domElement );this.screenSpacePanning = false; // pan orthogonal to world-space direction camera.upthis.mouseButtons.LEFT = THREE.MOUSE.PAN;this.mouseButtons.RIGHT = THREE.MOUSE.ROTATE;this.touches.ONE = THREE.TOUCH.PAN;this.touches.TWO = THREE.TOUCH.DOLLY_ROTATE;}}THREE.MapControls = MapControls;THREE.OrbitControls = OrbitControls;export {MapControls,OrbitControls}
主要代码
<template><div id="app"></div>
</template><script>
import {Scene, PerspectiveCamera, WebGLRenderer, DirectionalLight} from 'three';
import {GLTFLoader} from "@/lib/GLTFLoader";
import {OrbitControls} from "@/lib/OrbitControls"
export default {name: 'App',components: {},mounted() {let scene = new Scene();let camera = new PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);let loader = new GLTFLoader();/*实例化加载器*/let renderer = new WebGLRenderer();renderer.setSize(window.innerWidth, window.innerHeight);let app = document.getElementById("app")app.appendChild(renderer.domElement);//加载模型loader.load('./tesla/scene.gltf',function (obj) {console.log(obj);obj.scene.position.y = 1;scene.add(obj.scene);},function (xhr) {console.log( ( xhr.loaded / xhr.total * 100 ) + '% loaded' );},function (error) {console.log('load error!'+error);});//加载场景控制插件let controls = new OrbitControls(camera,renderer.domElement);controls.enableDamping = true;controls.enableZoom = true;controls.autoRotate = false;controls.autoRotateSpeed = 3;controls.enablePan = true;controls.enableKeys = true;controls.keyPanSpeed = 7;controls.keys = {LEFT:37,UP:38,RIGHT:39,BOTTOM:40}this.controls =controls;//添加一个光源let light = new DirectionalLight(0xffffff);//光源颜色light.position.set(20, 10, 1305);//光源位置scene.add(light);//光源添加到场景中camera.position.z = 5;//渲染场景let animate = function () {requestAnimationFrame(animate);renderer.render(scene, camera);};animate();}
}
</script><style>
#app {}body, html {margin: 0;padding: 0;
}
</style>
效果
效果图如下
完成demo，可以在这里下载url
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