Difference between revisions of "Team:Vilnius-Lithuania/secret-place/three-dimensional-models"

Line 36,621: Line 36,621:
 
case EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS:
 
case EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS:
 
extensions[ extensionName ] = new GLTFMaterialsPbrSpecularGlossinessExtension();
 
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 */
 +
window.GLTFLoader = GLTFLoader;
 +
function GLTFRegistry() {
 +
 +
let objects = {};
 +
 +
return {
 +
 +
get: function ( key ) {
 +
 +
return objects[ key ];
 +
 +
},
 +
 +
add: function ( key, object ) {
 +
 +
objects[ key ] = object;
 +
 +
},
 +
 +
remove: function ( key ) {
 +
 +
delete objects[ key ];
 +
 +
},
 +
 +
removeAll: function () {
 +
 +
objects = {};
 +
 +
}
 +
 +
};
 +
 +
}
 +
 +
/*********************************/
 +
/********** EXTENSIONS ***********/
 +
/*********************************/
 +
 +
const EXTENSIONS = {
 +
KHR_BINARY_GLTF: 'KHR_binary_glTF',
 +
KHR_DRACO_MESH_COMPRESSION: 'KHR_draco_mesh_compression',
 +
KHR_LIGHTS_PUNCTUAL: 'KHR_lights_punctual',
 +
KHR_MATERIALS_CLEARCOAT: 'KHR_materials_clearcoat',
 +
KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS: 'KHR_materials_pbrSpecularGlossiness',
 +
KHR_MATERIALS_TRANSMISSION: 'KHR_materials_transmission',
 +
KHR_MATERIALS_UNLIT: 'KHR_materials_unlit',
 +
KHR_TEXTURE_BASISU: 'KHR_texture_basisu',
 +
KHR_TEXTURE_TRANSFORM: 'KHR_texture_transform',
 +
KHR_MESH_QUANTIZATION: 'KHR_mesh_quantization',
 +
EXT_TEXTURE_WEBP: 'EXT_texture_webp',
 +
EXT_MESHOPT_COMPRESSION: 'EXT_meshopt_compression'
 +
};
 +
 +
/**
 +
* Punctual Lights Extension
 +
*
 +
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual
 +
*/
 +
class GLTFLightsExtension {
 +
 +
constructor( parser ) {
 +
 +
this.parser = parser;
 +
this.name = EXTENSIONS.KHR_LIGHTS_PUNCTUAL;
 +
 +
// Object3D instance caches
 +
this.cache = { refs: {}, uses: {} };
 +
 +
}
 +
 +
_markDefs() {
 +
 +
const parser = this.parser;
 +
const nodeDefs = this.parser.json.nodes || [];
 +
 +
for ( let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex ++ ) {
 +
 +
const nodeDef = nodeDefs[ nodeIndex ];
 +
 +
if ( nodeDef.extensions
 +
&& nodeDef.extensions[ this.name ]
 +
&& nodeDef.extensions[ this.name ].light !== undefined ) {
 +
 +
parser._addNodeRef( this.cache, nodeDef.extensions[ this.name ].light );
 +
 +
}
 +
 +
}
 +
 +
}
 +
 +
_loadLight( lightIndex ) {
 +
 +
const parser = this.parser;
 +
const cacheKey = 'light:' + lightIndex;
 +
let dependency = parser.cache.get( cacheKey );
 +
 +
if ( dependency ) return dependency;
 +
 +
const json = parser.json;
 +
const extensions = ( json.extensions && json.extensions[ this.name ] ) || {};
 +
const lightDefs = extensions.lights || [];
 +
const lightDef = lightDefs[ lightIndex ];
 +
let lightNode;
 +
 +
const color = new Color( 0xffffff );
 +
 +
if ( lightDef.color !== undefined ) color.fromArray( lightDef.color );
 +
 +
const range = lightDef.range !== undefined ? lightDef.range : 0;
 +
 +
switch ( lightDef.type ) {
 +
 +
case 'directional':
 +
lightNode = new DirectionalLight( color );
 +
lightNode.target.position.set( 0, 0, - 1 );
 +
lightNode.add( lightNode.target );
 +
break;
 +
 +
case 'point':
 +
lightNode = new PointLight( color );
 +
lightNode.distance = range;
 +
break;
 +
 +
case 'spot':
 +
lightNode = new SpotLight( color );
 +
lightNode.distance = range;
 +
// Handle spotlight properties.
 +
lightDef.spot = lightDef.spot || {};
 +
lightDef.spot.innerConeAngle = lightDef.spot.innerConeAngle !== undefined ? lightDef.spot.innerConeAngle : 0;
 +
lightDef.spot.outerConeAngle = lightDef.spot.outerConeAngle !== undefined ? lightDef.spot.outerConeAngle : Math.PI / 4.0;
 +
lightNode.angle = lightDef.spot.outerConeAngle;
 +
lightNode.penumbra = 1.0 - lightDef.spot.innerConeAngle / lightDef.spot.outerConeAngle;
 +
lightNode.target.position.set( 0, 0, - 1 );
 +
lightNode.add( lightNode.target );
 +
break;
 +
 +
default:
 +
throw new Error( 'THREE.GLTFLoader: Unexpected light type: ' + lightDef.type );
 +
 +
}
 +
 +
// Some lights (e.g. spot) default to a position other than the origin. Reset the position
 +
// here, because node-level parsing will only override position if explicitly specified.
 +
lightNode.position.set( 0, 0, 0 );
 +
 +
lightNode.decay = 2;
 +
 +
if ( lightDef.intensity !== undefined ) lightNode.intensity = lightDef.intensity;
 +
 +
lightNode.name = parser.createUniqueName( lightDef.name || ( 'light_' + lightIndex ) );
 +
 +
dependency = Promise.resolve( lightNode );
 +
 +
parser.cache.add( cacheKey, dependency );
 +
 +
return dependency;
 +
 +
}
 +
 +
createNodeAttachment( nodeIndex ) {
 +
 +
const self = this;
 +
const parser = this.parser;
 +
const json = parser.json;
 +
const nodeDef = json.nodes[ nodeIndex ];
 +
const lightDef = ( nodeDef.extensions && nodeDef.extensions[ this.name ] ) || {};
 +
const lightIndex = lightDef.light;
 +
 +
if ( lightIndex === undefined ) return null;
 +
 +
return this._loadLight( lightIndex ).then( function ( light ) {
 +
 +
return parser._getNodeRef( self.cache, lightIndex, light );
 +
 +
} );
 +
 +
}
 +
 +
}
 +
 +
/**
 +
* Unlit Materials Extension
 +
*
 +
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_unlit
 +
*/
 +
class GLTFMaterialsUnlitExtension {
 +
 +
constructor() {
 +
 +
this.name = EXTENSIONS.KHR_MATERIALS_UNLIT;
 +
 +
}
 +
 +
getMaterialType() {
 +
 +
return MeshBasicMaterial;
 +
 +
}
 +
 +
extendParams( materialParams, materialDef, parser ) {
 +
 +
const pending = [];
 +
 +
materialParams.color = new Color( 1.0, 1.0, 1.0 );
 +
materialParams.opacity = 1.0;
 +
 +
const metallicRoughness = materialDef.pbrMetallicRoughness;
 +
 +
if ( metallicRoughness ) {
 +
 +
if ( Array.isArray( metallicRoughness.baseColorFactor ) ) {
 +
 +
const array = metallicRoughness.baseColorFactor;
 +
 +
materialParams.color.fromArray( array );
 +
materialParams.opacity = array[ 3 ];
 +
 +
}
 +
 +
if ( metallicRoughness.baseColorTexture !== undefined ) {
 +
 +
pending.push( parser.assignTexture( materialParams, 'map', metallicRoughness.baseColorTexture ) );
 +
 +
}
 +
 +
}
 +
 +
return Promise.all( pending );
 +
 +
}
 +
 +
}
 +
 +
/**
 +
* Clearcoat Materials Extension
 +
*
 +
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_clearcoat
 +
*/
 +
class GLTFMaterialsClearcoatExtension {
 +
 +
constructor( parser ) {
 +
 +
this.parser = parser;
 +
this.name = EXTENSIONS.KHR_MATERIALS_CLEARCOAT;
 +
 +
}
 +
 +
getMaterialType( materialIndex ) {
 +
 +
const parser = this.parser;
 +
const materialDef = parser.json.materials[ materialIndex ];
 +
 +
if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;
 +
 +
return MeshPhysicalMaterial;
 +
 +
}
 +
 +
extendMaterialParams( materialIndex, materialParams ) {
 +
 +
const parser = this.parser;
 +
const materialDef = parser.json.materials[ materialIndex ];
 +
 +
if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {
 +
 +
return Promise.resolve();
 +
 +
}
 +
 +
const pending = [];
 +
 +
const extension = materialDef.extensions[ this.name ];
 +
 +
if ( extension.clearcoatFactor !== undefined ) {
 +
 +
materialParams.clearcoat = extension.clearcoatFactor;
 +
 +
}
 +
 +
if ( extension.clearcoatTexture !== undefined ) {
 +
 +
pending.push( parser.assignTexture( materialParams, 'clearcoatMap', extension.clearcoatTexture ) );
 +
 +
}
 +
 +
if ( extension.clearcoatRoughnessFactor !== undefined ) {
 +
 +
materialParams.clearcoatRoughness = extension.clearcoatRoughnessFactor;
 +
 +
}
 +
 +
if ( extension.clearcoatRoughnessTexture !== undefined ) {
 +
 +
pending.push( parser.assignTexture( materialParams, 'clearcoatRoughnessMap', extension.clearcoatRoughnessTexture ) );
 +
 +
}
 +
 +
if ( extension.clearcoatNormalTexture !== undefined ) {
 +
 +
pending.push( parser.assignTexture( materialParams, 'clearcoatNormalMap', extension.clearcoatNormalTexture ) );
 +
 +
if ( extension.clearcoatNormalTexture.scale !== undefined ) {
 +
 +
const scale = extension.clearcoatNormalTexture.scale;
 +
 +
// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
 +
materialParams.clearcoatNormalScale = new Vector2( scale, - scale );
 +
 +
}
 +
 +
}
 +
 +
return Promise.all( pending );
 +
 +
}
 +
 +
}
 +
 +
/**
 +
* Transmission Materials Extension
 +
*
 +
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_transmission
 +
* Draft: https://github.com/KhronosGroup/glTF/pull/1698
 +
*/
 +
class GLTFMaterialsTransmissionExtension {
 +
 +
constructor( parser ) {
 +
 +
this.parser = parser;
 +
this.name = EXTENSIONS.KHR_MATERIALS_TRANSMISSION;
 +
 +
}
 +
 +
getMaterialType( materialIndex ) {
 +
 +
const parser = this.parser;
 +
const materialDef = parser.json.materials[ materialIndex ];
 +
 +
if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;
 +
 +
return MeshPhysicalMaterial;
 +
 +
}
 +
 +
extendMaterialParams( materialIndex, materialParams ) {
 +
 +
const parser = this.parser;
 +
const materialDef = parser.json.materials[ materialIndex ];
 +
 +
if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {
 +
 +
return Promise.resolve();
 +
 +
}
 +
 +
const pending = [];
 +
 +
const extension = materialDef.extensions[ this.name ];
 +
 +
if ( extension.transmissionFactor !== undefined ) {
 +
 +
materialParams.transmission = extension.transmissionFactor;
 +
 +
}
 +
 +
if ( extension.transmissionTexture !== undefined ) {
 +
 +
pending.push( parser.assignTexture( materialParams, 'transmissionMap', extension.transmissionTexture ) );
 +
 +
}
 +
 +
return Promise.all( pending );
 +
 +
}
 +
 +
}
 +
 +
/**
 +
* BasisU Texture Extension
 +
*
 +
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_basisu
 +
*/
 +
class GLTFTextureBasisUExtension {
 +
 +
constructor( parser ) {
 +
 +
this.parser = parser;
 +
this.name = EXTENSIONS.KHR_TEXTURE_BASISU;
 +
 +
}
 +
 +
loadTexture( textureIndex ) {
 +
 +
const parser = this.parser;
 +
const json = parser.json;
 +
 +
const textureDef = json.textures[ textureIndex ];
 +
 +
if ( ! textureDef.extensions || ! textureDef.extensions[ this.name ] ) {
 +
 +
return null;
 +
 +
}
 +
 +
const extension = textureDef.extensions[ this.name ];
 +
const source = json.images[ extension.source ];
 +
const loader = parser.options.ktx2Loader;
 +
 +
if ( ! loader ) {
 +
 +
if ( json.extensionsRequired && json.extensionsRequired.indexOf( this.name ) >= 0 ) {
 +
 +
throw new Error( 'THREE.GLTFLoader: setKTX2Loader must be called before loading KTX2 textures' );
 +
 +
} else {
 +
 +
// Assumes that the extension is optional and that a fallback texture is present
 +
return null;
 +
 +
}
 +
 +
}
 +
 +
return parser.loadTextureImage( textureIndex, source, loader );
 +
 +
}
 +
 +
}
 +
 +
/**
 +
* WebP Texture Extension
 +
*
 +
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_texture_webp
 +
*/
 +
class GLTFTextureWebPExtension {
 +
 +
constructor( parser ) {
 +
 +
this.parser = parser;
 +
this.name = EXTENSIONS.EXT_TEXTURE_WEBP;
 +
this.isSupported = null;
 +
 +
}
 +
 +
loadTexture( textureIndex ) {
 +
 +
const name = this.name;
 +
const parser = this.parser;
 +
const json = parser.json;
 +
 +
const textureDef = json.textures[ textureIndex ];
 +
 +
if ( ! textureDef.extensions || ! textureDef.extensions[ name ] ) {
 +
 +
return null;
 +
 +
}
 +
 +
const extension = textureDef.extensions[ name ];
 +
const source = json.images[ extension.source ];
 +
 +
let loader = parser.textureLoader;
 +
if ( source.uri ) {
 +
 +
const handler = parser.options.manager.getHandler( source.uri );
 +
if ( handler !== null ) loader = handler;
 +
 +
}
 +
 +
return this.detectSupport().then( function ( isSupported ) {
 +
 +
if ( isSupported ) return parser.loadTextureImage( textureIndex, source, loader );
 +
 +
if ( json.extensionsRequired && json.extensionsRequired.indexOf( name ) >= 0 ) {
 +
 +
throw new Error( 'THREE.GLTFLoader: WebP required by asset but unsupported.' );
 +
 +
}
 +
 +
// Fall back to PNG or JPEG.
 +
return parser.loadTexture( textureIndex );
 +
 +
} );
 +
 +
}
 +
 +
detectSupport() {
 +
 +
if ( ! this.isSupported ) {
 +
 +
this.isSupported = new Promise( function ( resolve ) {
 +
 +
const image = new Image();
 +
 +
// Lossy test image. Support for lossy images doesn't guarantee support for all
 +
// WebP images, unfortunately.
 +
image.src = 'data:image/webp;base64,UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA';
 +
 +
image.onload = image.onerror = function () {
 +
 +
resolve( image.height === 1 );
 +
 +
};
 +
 +
} );
 +
 +
}
 +
 +
return this.isSupported;
 +
 +
}
 +
 +
}
 +
 +
/**
 +
* meshopt BufferView Compression Extension
 +
*
 +
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_meshopt_compression
 +
*/
 +
class GLTFMeshoptCompression {
 +
 +
constructor( parser ) {
 +
 +
this.name = EXTENSIONS.EXT_MESHOPT_COMPRESSION;
 +
this.parser = parser;
 +
 +
}
 +
 +
loadBufferView( index ) {
 +
 +
const json = this.parser.json;
 +
const bufferView = json.bufferViews[ index ];
 +
 +
if ( bufferView.extensions && bufferView.extensions[ this.name ] ) {
 +
 +
const extensionDef = bufferView.extensions[ this.name ];
 +
 +
const buffer = this.parser.getDependency( 'buffer', extensionDef.buffer );
 +
const decoder = this.parser.options.meshoptDecoder;
 +
 +
if ( ! decoder || ! decoder.supported ) {
 +
 +
if ( json.extensionsRequired && json.extensionsRequired.indexOf( this.name ) >= 0 ) {
 +
 +
throw new Error( 'THREE.GLTFLoader: setMeshoptDecoder must be called before loading compressed files' );
 +
 +
} else {
 +
 +
// Assumes that the extension is optional and that fallback buffer data is present
 +
return null;
 +
 +
}
 +
 +
}
 +
 +
return Promise.all( [ buffer, decoder.ready ] ).then( function ( res ) {
 +
 +
const byteOffset = extensionDef.byteOffset || 0;
 +
const byteLength = extensionDef.byteLength || 0;
 +
 +
const count = extensionDef.count;
 +
const stride = extensionDef.byteStride;
 +
 +
const result = new ArrayBuffer( count * stride );
 +
const source = new Uint8Array( res[ 0 ], byteOffset, byteLength );
 +
 +
decoder.decodeGltfBuffer( new Uint8Array( result ), count, stride, source, extensionDef.mode, extensionDef.filter );
 +
return result;
 +
 +
} );
 +
 +
} else {
 +
 +
return null;
 +
 +
}
 +
 +
}
 +
 +
}
 +
 +
/* BINARY EXTENSION */
 +
const BINARY_EXTENSION_HEADER_MAGIC = 'glTF';
 +
const BINARY_EXTENSION_HEADER_LENGTH = 12;
 +
const BINARY_EXTENSION_CHUNK_TYPES = { JSON: 0x4E4F534A, BIN: 0x004E4942 };
 +
 +
class GLTFBinaryExtension {
 +
 +
constructor( data ) {
 +
 +
this.name = EXTENSIONS.KHR_BINARY_GLTF;
 +
this.content = null;
 +
this.body = null;
 +
 +
const headerView = new DataView( data, 0, BINARY_EXTENSION_HEADER_LENGTH );
 +
 +
this.header = {
 +
magic: LoaderUtils.decodeText( new Uint8Array( data.slice( 0, 4 ) ) ),
 +
version: headerView.getUint32( 4, true ),
 +
length: headerView.getUint32( 8, true )
 +
};
 +
 +
if ( this.header.magic !== BINARY_EXTENSION_HEADER_MAGIC ) {
 +
 +
throw new Error( 'THREE.GLTFLoader: Unsupported glTF-Binary header.' );
 +
 +
} else if ( this.header.version < 2.0 ) {
 +
 +
throw new Error( 'THREE.GLTFLoader: Legacy binary file detected.' );
 +
 +
}
 +
 +
const chunkContentsLength = this.header.length - BINARY_EXTENSION_HEADER_LENGTH;
 +
const chunkView = new DataView( data, BINARY_EXTENSION_HEADER_LENGTH );
 +
let chunkIndex = 0;
 +
 +
while ( chunkIndex < chunkContentsLength ) {
 +
 +
const chunkLength = chunkView.getUint32( chunkIndex, true );
 +
chunkIndex += 4;
 +
 +
const chunkType = chunkView.getUint32( chunkIndex, true );
 +
chunkIndex += 4;
 +
 +
if ( chunkType === BINARY_EXTENSION_CHUNK_TYPES.JSON ) {
 +
 +
const contentArray = new Uint8Array( data, BINARY_EXTENSION_HEADER_LENGTH + chunkIndex, chunkLength );
 +
this.content = LoaderUtils.decodeText( contentArray );
 +
 +
} else if ( chunkType === BINARY_EXTENSION_CHUNK_TYPES.BIN ) {
 +
 +
const byteOffset = BINARY_EXTENSION_HEADER_LENGTH + chunkIndex;
 +
this.body = data.slice( byteOffset, byteOffset + chunkLength );
 +
 +
}
 +
 +
// 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 replacing
 +
const specularMapParsFragmentChunk = [
 +
'#ifdef USE_SPECULARMAP',
 +
' uniform sampler2D specularMap;',
 +
'#endif'
 +
].join( '\n' );
 +
 +
const glossinessMapParsFragmentChunk = [
 +
'#ifdef USE_GLOSSINESSMAP',
 +
' uniform sampler2D glossinessMap;',
 +
'#endif'
 +
].join( '\n' );
 +
 +
const specularMapFragmentChunk = [
 +
'vec3 specularFactor = specular;',
 +
'#ifdef USE_SPECULARMAP',
 +
' vec4 texelSpecular = texture2D( specularMap, vUv );',
 +
' texelSpecular = sRGBToLinear( texelSpecular );',
 +
' // reads channel RGB, compatible with a glTF Specular-Glossiness (RGBA) texture',
 +
' specularFactor *= texelSpecular.rgb;',
 +
'#endif'
 +
].join( '\n' );
 +
 +
const glossinessMapFragmentChunk = [
 +
'float glossinessFactor = glossiness;',
 +
'#ifdef USE_GLOSSINESSMAP',
 +
' vec4 texelGlossiness = texture2D( glossinessMap, vUv );',
 +
' // reads channel A, compatible with a glTF Specular-Glossiness (RGBA) texture',
 +
' glossinessFactor *= texelGlossiness.a;',
 +
'#endif'
 +
].join( '\n' );
 +
 +
const lightPhysicalFragmentChunk = [
 +
'PhysicalMaterial material;',
 +
'material.diffuseColor = diffuseColor.rgb * ( 1. - max( specularFactor.r, max( specularFactor.g, specularFactor.b ) ) );',
 +
'vec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );',
 +
'float geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );',
 +
'material.specularRoughness = max( 1.0 - glossinessFactor, 0.0525 ); // 0.0525 corresponds to the base mip of a 256 cubemap.',
 +
'material.specularRoughness += geometryRoughness;',
 +
'material.specularRoughness = min( material.specularRoughness, 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_k
 +
const m0 = values[ offset0 + i + stride2 ] * td; // outTangent_k * (t_k+1 - t_k)
 +
const p1 = values[ offset1 + i + stride ]; // splineVertex_k+1
 +
const m1 = values[ offset1 + i ] * td; // inTangent_k+1 * (t_k+1 - t_k)
 +
 +
result[ i ] = s0 * p0 + s1 * m0 + s2 * p1 + s3 * m1;
 +
 +
}
 +
 +
return result;
 +
 +
};
 +
 +
/*********************************/
 +
/********** 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 URL
 +
if ( typeof url !== 'string' || url === '' ) return '';
 +
 +
// Host Relative URL
 +
if ( /^https?:\/\//i.test( path ) && /^\//.test( url ) ) {
 +
 +
path = path.replace( /(^https?:\/\/[^\/]+).*/i, '$1' );
 +
 +
}
 +
 +
// Absolute URL http://,https://,//
 +
if ( /^(https?:)?\/\//i.test( url ) ) return url;
 +
 +
// Data URI
 +
if ( /^data:.*,.*$/i.test( url ) ) return url;
 +
 +
// Blob URL
 +
if ( /^blob:.*$/i.test( url ) ) return url;
 +
 +
// Relative URL
 +
return 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-data
 +
 +
switch ( constructor ) {
 +
 +
case Int8Array:
 +
return 1 / 127;
 +
 +
case Uint8Array:
 +
return 1 / 255;
 +
 +
case Int16Array:
 +
return 1 / 32767;
 +
 +
case Uint16Array:
 +
return 1 / 65535;
 +
 +
default:
 +
throw new Error( 'THREE.GLTFLoader: Unsupported normalized accessor component type.' );
 +
 +
}
 +
 +
}
 +
 +
/* GLTF PARSER */
 +
 +
class GLTFParser {
 +
 +
constructor( json = {}, options = {} ) {
 +
 +
this.json = json;
 +
this.extensions = {};
 +
this.plugins = {};
 +
this.options = options;
 +
 +
// loader object cache
 +
this.cache = new GLTFRegistry();
 +
 +
// associations between Three.js objects and glTF elements
 +
this.associations = new Map();
 +
 +
// BufferGeometry caching
 +
this.primitiveCache = {};
 +
 +
// Object3D instance caches
 +
this.meshCache = { refs: {}, uses: {} };
 +
this.cameraCache = { refs: {}, uses: {} };
 +
this.lightCache = { refs: {}, uses: {} };
 +
 +
this.textureCache = {};
 +
 +
// Track node names, to ensure no duplicates
 +
this.nodeNamesUsed = {};
 +
 +
// Use an ImageBitmapLoader if imageBitmaps are supported. Moves much of the
 +
// expensive work of uploading a texture to the GPU off the main thread.
 +
if ( typeof createImageBitmap !== 'undefined' && /Firefox/.test( navigator.userAgent ) === false ) {
 +
 +
this.textureLoader = new ImageBitmapLoader( this.options.manager );
 +
 +
} else {
 +
 +
this.textureLoader = new TextureLoader( this.options.manager );
 +
 +
}
 +
 +
this.textureLoader.setCrossOrigin( this.options.crossOrigin );
 +
this.textureLoader.setRequestHeader( this.options.requestHeader );
 +
 +
this.fileLoader = new FileLoader( this.options.manager );
 +
this.fileLoader.setResponseType( 'arraybuffer' );
 +
 +
if ( this.options.crossOrigin === 'use-credentials' ) {
 +
 +
this.fileLoader.setWithCredentials( true );
 +
 +
}
 +
 +
}
 +
 +
setExtensions( extensions ) {
 +
 +
this.extensions = extensions;
 +
 +
}
 +
 +
setPlugins( plugins ) {
 +
 +
this.plugins = plugins;
 +
 +
}
 +
 +
parse( onLoad, onError ) {
 +
 +
const parser = this;
 +
const json = this.json;
 +
const extensions = this.extensions;
 +
 +
// Clear the loader cache
 +
this.cache.removeAll();
 +
 +
// Mark the special nodes/meshes in json for efficient parse
 +
this._invokeAll( function ( ext ) {
 +
 +
return ext._markDefs && ext._markDefs();
 +
 +
} );
 +
 +
Promise.all( this._invokeAll( function ( ext ) {
 +
 +
return ext.beforeRoot && ext.beforeRoot();
 +
 +
} ) ).then( function () {
 +
 +
return Promise.all( [
 +
 +
parser.getDependencies( 'scene' ),
 +
parser.getDependencies( 'animation' ),
 +
parser.getDependencies( 'camera' ),
 +
 +
] );
 +
 +
} ).then( function ( dependencies ) {
 +
 +
const result = {
 +
scene: dependencies[ 0 ][ json.scene || 0 ],
 +
scenes: dependencies[ 0 ],
 +
animations: dependencies[ 1 ],
 +
cameras: dependencies[ 2 ],
 +
asset: json.asset,
 +
parser: parser,
 +
userData: {}
 +
};
 +
 +
addUnknownExtensionsToUserData( extensions, result, json );
 +
 +
assignExtrasToUserData( result, json );
 +
 +
Promise.all( parser._invokeAll( function ( ext ) {
 +
 +
return ext.afterRoot && ext.afterRoot( result );
 +
 +
} ) ).then( function () {
 +
 +
onLoad( result );
 +
 +
} );
 +
 +
} ).catch( onError );
 +
 +
}
 +
 +
/**
 +
* Marks the special nodes/meshes in json for efficient parse.
 +
*/
 +
_markDefs() {
 +
 +
const nodeDefs = this.json.nodes || [];
 +
const skinDefs = this.json.skins || [];
 +
const meshDefs = this.json.meshes || [];
 +
 +
// Nothing in the node definition indicates whether it is a Bone or an
 +
// Object3D. Use the skins' joint references to mark bones.
 +
for ( let skinIndex = 0, skinLength = skinDefs.length; skinIndex < skinLength; skinIndex ++ ) {
 +
 +
const joints = skinDefs[ skinIndex ].joints;
 +
 +
for ( let i = 0, il = joints.length; i < il; i ++ ) {
 +
 +
nodeDefs[ joints[ i ] ].isBone = true;
 +
 +
}
 +
 +
}
 +
 +
// Iterate over all nodes, marking references to shared resources,
 +
// as well as skeleton joints.
 +
for ( let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex ++ ) {
 +
 +
const nodeDef = nodeDefs[ nodeIndex ];
 +
 +
if ( nodeDef.mesh !== undefined ) {
 +
 +
this._addNodeRef( this.meshCache, nodeDef.mesh );
 +
 +
// Nothing in the mesh definition indicates whether it is
 +
// a SkinnedMesh or Mesh. Use the node's mesh reference
 +
// to mark SkinnedMesh if node has skin.
 +
if ( nodeDef.skin !== undefined ) {
 +
 +
meshDefs[ nodeDef.mesh ].isSkinnedMesh = true;
 +
 +
}
 +
 +
}
 +
 +
if ( nodeDef.camera !== undefined ) {
 +
 +
this._addNodeRef( this.cameraCache, nodeDef.camera );
 +
 +
}
 +
 +
}
 +
 +
}
 +
 +
/**
 +
* Counts references to shared node / Object3D resources. These resources
 +
* can be reused, or "instantiated", at multiple nodes in the scene
 +
* hierarchy. Mesh, Camera, and Light instances are instantiated and must
 +
* be marked. Non-scenegraph resources (like Materials, Geometries, and
 +
* Textures) can be reused directly and are not marked here.
 +
*
 +
* Example: CesiumMilkTruck sample model reuses "Wheel" meshes.
 +
*/
 +
_addNodeRef( cache, index ) {
 +
 +
if ( index === undefined ) return;
 +
 +
if ( cache.refs[ index ] === undefined ) {
 +
 +
cache.refs[ index ] = cache.uses[ index ] = 0;
 +
 +
}
 +
 +
cache.refs[ index ] ++;
 +
 +
}
 +
 +
/** Returns a reference to a shared resource, cloning it if necessary. */
 +
_getNodeRef( cache, index, object ) {
 +
 +
if ( cache.refs[ index ] <= 1 ) return object;
 +
 +
const ref = object.clone();
 +
 +
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 properly
 +
const ibSlice = Math.floor( byteOffset / byteStride );
 +
const ibCacheKey = 'InterleavedBuffer:' + accessorDef.bufferView + ':' + accessorDef.componentType + ':' + ibSlice + ':' + accessorDef.count;
 +
let ib = parser.cache.get( ibCacheKey );
 +
 +
if ( ! ib ) {
 +
 +
array = new TypedArray( bufferView, ibSlice * byteStride, accessorDef.count * byteStride / elementBytes );
 +
 +
// Integer parameters to IB/IBA are in array elements, not bytes.
 +
ib = new InterleavedBuffer( array, byteStride / elementBytes );
 +
 +
parser.cache.add( ibCacheKey, ib );
 +
 +
}
 +
 +
bufferAttribute = new InterleavedBufferAttribute( ib, itemSize, ( byteOffset % byteStride ) / elementBytes, normalized );
 +
 +
} else {
 +
 +
if ( bufferView === null ) {
 +
 +
array = new TypedArray( accessorDef.count * itemSize );
 +
 +
} else {
 +
 +
array = new TypedArray( bufferView, byteOffset, accessorDef.count * itemSize );
 +
 +
}
 +
 +
bufferAttribute = new BufferAttribute( array, itemSize, normalized );
 +
 +
}
 +
 +
// https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#sparse-accessors
 +
if ( accessorDef.sparse !== undefined ) {
 +
 +
const itemSizeIndices = WEBGL_TYPE_SIZES.SCALAR;
 +
const TypedArrayIndices = WEBGL_COMPONENT_TYPES[ accessorDef.sparse.indices.componentType ];
 +
 +
const byteOffsetIndices = accessorDef.sparse.indices.byteOffset || 0;
 +
const byteOffsetValues = accessorDef.sparse.values.byteOffset || 0;
 +
 +
const sparseIndices = new TypedArrayIndices( bufferViews[ 1 ], byteOffsetIndices, accessorDef.sparse.count * itemSizeIndices );
 +
const sparseValues = new TypedArray( bufferViews[ 2 ], byteOffsetValues, accessorDef.sparse.count * itemSize );
 +
 +
if ( bufferView !== null ) {
 +
 +
// Avoid modifying the original ArrayBuffer, if the bufferView wasn't initialized with zeroes.
 +
bufferAttribute = new BufferAttribute( bufferAttribute.array.slice(), bufferAttribute.itemSize, bufferAttribute.normalized );
 +
 +
}
 +
 +
for ( let i = 0, il = sparseIndices.length; i < il; i ++ ) {
 +
 +
const index = sparseIndices[ i ];
 +
 +
bufferAttribute.setX( index, sparseValues[ i * itemSize ] );
 +
if ( itemSize >= 2 ) bufferAttribute.setY( index, sparseValues[ i * itemSize + 1 ] );
 +
if ( itemSize >= 3 ) bufferAttribute.setZ( index, sparseValues[ i * itemSize + 2 ] );
 +
if ( itemSize >= 4 ) bufferAttribute.setW( index, sparseValues[ i * itemSize + 3 ] );
 +
if ( itemSize >= 5 ) throw new Error( 'THREE.GLTFLoader: Unsupported itemSize in sparse BufferAttribute.' );
 +
 +
}
 +
 +
}
 +
 +
return bufferAttribute;
 +
 +
} );
 +
 +
}
 +
 +
/**
 +
* Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#textures
 +
* @param {number} textureIndex
 +
* @return {Promise<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_header
 +
const 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}
 +
*/
 +
assignTexture( materialParams, mapName, mapDef ) {
 +
 +
const parser = this;
 +
 +
return this.getDependency( 'texture', mapDef.index ).then( function ( texture ) {
 +
 +
// Materials sample aoMap from UV set 1 and other maps from UV set 0 - this can't be configured
 +
// However, we will copy UV set 0 to UV set 1 on demand for aoMap
 +
if ( mapDef.texCoord !== undefined && mapDef.texCoord != 0 && ! ( mapName === 'aoMap' && mapDef.texCoord == 1 ) ) {
 +
 +
console.warn( 'THREE.GLTFLoader: Custom UV set ' + mapDef.texCoord + ' for texture ' + mapName + ' not yet supported.' );
 +
 +
}
 +
 +
if ( parser.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] ) {
 +
 +
const transform = mapDef.extensions !== undefined ? mapDef.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] : undefined;
 +
 +
if ( transform ) {
 +
 +
const gltfReference = parser.associations.get( texture );
 +
texture = parser.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ].extendTexture( texture, transform );
 +
parser.associations.set( texture, gltfReference );
 +
 +
}
 +
 +
}
 +
 +
materialParams[ mapName ] = texture;
 +
 +
} );
 +
 +
}
 +
 +
/**
 +
* 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;
 +
const useMorphTargets = Object.keys( geometry.morphAttributes ).length > 0;
 +
const useMorphNormals = useMorphTargets && geometry.morphAttributes.normal !== undefined;
 +
 +
if ( mesh.isPoints ) {
 +
 +
const cacheKey = 'PointsMaterial:' + material.uuid;
 +
 +
let pointsMaterial = this.cache.get( cacheKey );
 +
 +
if ( ! pointsMaterial ) {
 +
 +
pointsMaterial = new PointsMaterial();
 +
Material.prototype.copy.call( pointsMaterial, material );
 +
pointsMaterial.color.copy( material.color );
 +
pointsMaterial.map = material.map;
 +
pointsMaterial.sizeAttenuation = false; // glTF spec says points should be 1px
 +
 +
this.cache.add( cacheKey, pointsMaterial );
 +
 +
}
 +
 +
material = pointsMaterial;
 +
 +
} else if ( mesh.isLine ) {
 +
 +
const cacheKey = 'LineBasicMaterial:' + material.uuid;
 +
 +
let lineMaterial = this.cache.get( cacheKey );
 +
 +
if ( ! lineMaterial ) {
 +
 +
lineMaterial = new LineBasicMaterial();
 +
Material.prototype.copy.call( lineMaterial, material );
 +
lineMaterial.color.copy( material.color );
 +
 +
this.cache.add( cacheKey, lineMaterial );
 +
 +
}
 +
 +
material = lineMaterial;
 +
 +
}
 +
 +
// Clone the material if it will be modified
 +
if ( useVertexTangents || useVertexColors || useFlatShading || useMorphTargets ) {
 +
 +
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:';
 +
if ( useMorphTargets ) cacheKey += 'morph-targets:';
 +
if ( useMorphNormals ) cacheKey += 'morph-normals:';
 +
 +
let cachedMaterial = this.cache.get( cacheKey );
 +
 +
if ( ! cachedMaterial ) {
 +
 +
cachedMaterial = material.clone();
 +
 +
if ( useVertexColors ) cachedMaterial.vertexColors = true;
 +
if ( useFlatShading ) cachedMaterial.flatShading = true;
 +
if ( useMorphTargets ) cachedMaterial.morphTargets = true;
 +
if ( useMorphNormals ) cachedMaterial.morphNormals = true;
 +
 +
if ( useVertexTangents ) {
 +
 +
cachedMaterial.vertexTangents = true;
 +
 +
// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
 +
if ( cachedMaterial.normalScale ) cachedMaterial.normalScale.y *= - 1;
 +
if ( cachedMaterial.clearcoatNormalScale ) cachedMaterial.clearcoatNormalScale.y *= - 1;
 +
 +
}
 +
 +
this.cache.add( cacheKey, cachedMaterial );
 +
 +
this.associations.set( cachedMaterial, this.associations.get( material ) );
 +
 +
}
 +
 +
material = cachedMaterial;
 +
 +
}
 +
 +
// workarounds for mesh and geometry
 +
 +
if ( material.aoMap && geometry.attributes.uv2 === undefined && geometry.attributes.uv !== undefined ) {
 +
 +
geometry.setAttribute( 'uv2', geometry.attributes.uv );
 +
 +
}
 +
 +
mesh.material = material;
 +
 +
}
 +
 +
getMaterialType( /* materialIndex */ ) {
 +
 +
return MeshStandardMaterial;
 +
 +
}
 +
 +
/**
 +
* Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#materials
 +
* @param {number} materialIndex
 +
* @return {Promise<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-material
 +
 +
const metallicRoughness = materialDef.pbrMetallicRoughness || {};
 +
 +
materialParams.color = new Color( 1.0, 1.0, 1.0 );
 +
materialParams.opacity = 1.0;
 +
 +
if ( Array.isArray( metallicRoughness.baseColorFactor ) ) {
 +
 +
const array = metallicRoughness.baseColorFactor;
 +
 +
materialParams.color.fromArray( array );
 +
materialParams.opacity = array[ 3 ];
 +
 +
}
 +
 +
if ( metallicRoughness.baseColorTexture !== undefined ) {
 +
 +
pending.push( parser.assignTexture( materialParams, 'map', metallicRoughness.baseColorTexture ) );
 +
 +
}
 +
 +
materialParams.metalness = metallicRoughness.metallicFactor !== undefined ? metallicRoughness.metallicFactor : 1.0;
 +
materialParams.roughness = metallicRoughness.roughnessFactor !== undefined ? metallicRoughness.roughnessFactor : 1.0;
 +
 +
if ( metallicRoughness.metallicRoughnessTexture !== undefined ) {
 +
 +
pending.push( parser.assignTexture( materialParams, 'metalnessMap', metallicRoughness.metallicRoughnessTexture ) );
 +
pending.push( parser.assignTexture( materialParams, 'roughnessMap', metallicRoughness.metallicRoughnessTexture ) );
 +
 +
}
 +
 +
materialType = this._invokeOne( function ( ext ) {
 +
 +
return ext.getMaterialType && ext.getMaterialType( materialIndex );
 +
 +
} );
 +
 +
pending.push( Promise.all( this._invokeAll( function ( ext ) {
 +
 +
return ext.extendMaterialParams && ext.extendMaterialParams( materialIndex, materialParams );
 +
 +
} ) ) );
 +
 +
}
 +
 +
if ( materialDef.doubleSided === true ) {
 +
 +
materialParams.side = DoubleSide;
 +
 +
}
 +
 +
const alphaMode = materialDef.alphaMode || ALPHA_MODES.OPAQUE;
 +
 +
if ( alphaMode === ALPHA_MODES.BLEND ) {
 +
 +
materialParams.transparent = true;
 +
 +
// See: https://github.com/mrdoob/three.js/issues/17706
 +
materialParams.depthWrite = false;
 +
 +
} else {
 +
 +
materialParams.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-507003995
 +
materialParams.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 geometry
 +
const cached = cache[ cacheKey ];
 +
 +
if ( cached ) {
 +
 +
// Use the cached geometry if it exists
 +
pending.push( cached.promise );
 +
 +
} else {
 +
 +
let geometryPromise;
 +
 +
if ( primitive.extensions && primitive.extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ] ) {
 +
 +
// Use DRACO geometry if available
 +
geometryPromise = createDracoPrimitive( primitive );
 +
 +
} else {
 +
 +
// Otherwise create a new geometry
 +
geometryPromise = addPrimitiveAttributes( new BufferGeometry(), primitive, parser );
 +
 +
}
 +
 +
// Cache this geometry
 +
cache[ cacheKey ] = { primitive: primitive, promise: geometryPromise };
 +
 +
pending.push( geometryPromise );
 +
 +
}
 +
 +
}
 +
 +
return Promise.all( pending );
 +
 +
}
 +
 +
/**
 +
* Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#meshes
 +
* @param {number} meshIndex
 +
* @return {Promise<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 Mesh
 +
 +
let mesh;
 +
 +
const material = materials[ i ];
 +
 +
if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLES ||
 +
primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP ||
 +
primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN ||
 +
primitive.mode === undefined ) {
 +
 +
// .isSkinnedMesh isn't in glTF spec. See ._markDefs()
 +
mesh = meshDef.isSkinnedMesh === true
 +
? new SkinnedMesh( geometry, material )
 +
: new Mesh( geometry, material );
 +
 +
if ( mesh.isSkinnedMesh === true && ! mesh.geometry.attributes.skinWeight.normalized ) {
 +
 +
// we normalize floating point skin weight array to fix malformed assets (see #15319)
 +
// it's important to skip this for non-float32 data since normalizeSkinWeights assumes non-normalized inputs
 +
mesh.normalizeSkinWeights();
 +
 +
}
 +
 +
if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP ) {
 +
 +
mesh.geometry = toTrianglesDrawMode( mesh.geometry, TriangleStripDrawMode );
 +
 +
} else if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN ) {
 +
 +
mesh.geometry = toTrianglesDrawMode( mesh.geometry, TriangleFanDrawMode );
 +
 +
}
 +
 +
} else if ( primitive.mode === WEBGL_CONSTANTS.LINES ) {
 +
 +
mesh = new LineSegments( geometry, material );
 +
 +
} else if ( primitive.mode === WEBGL_CONSTANTS.LINE_STRIP ) {
 +
 +
mesh = new Line( geometry, material );
 +
 +
} else if ( primitive.mode === WEBGL_CONSTANTS.LINE_LOOP ) {
 +
 +
mesh = new LineLoop( geometry, material );
 +
 +
} else if ( primitive.mode === WEBGL_CONSTANTS.POINTS ) {
 +
 +
mesh = new Points( geometry, material );
 +
 +
} else {
 +
 +
throw new Error( 'THREE.GLTFLoader: Primitive mode unsupported: ' + primitive.mode );
 +
 +
}
 +
 +
if ( Object.keys( mesh.geometry.morphAttributes ).length > 0 ) {
 +
 +
updateMorphTargets( mesh, meshDef );
 +
 +
}
 +
 +
mesh.name = parser.createUniqueName( meshDef.name || ( 'mesh_' + meshIndex ) );
 +
 +
assignExtrasToUserData( mesh, meshDef );
 +
 +
if ( primitive.extensions ) addUnknownExtensionsToUserData( extensions, mesh, primitive );
 +
 +
parser.assignFinalMaterial( mesh );
 +
 +
meshes.push( mesh );
 +
 +
}
 +
 +
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.
 +
 +
return new GLTFCubicSplineInterpolant( 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 ._markDefs
 +
if ( nodeDef.isBone === true ) {
 +
 +
node = new Bone();
 +
 +
} else if ( objects.length > 1 ) {
 +
 +
node = new Group();
 +
 +
} else if ( objects.length === 1 ) {
 +
 +
node = objects[ 0 ];
 +
 +
} else {
 +
 +
node = new Object3D();
 +
 +
}
 +
 +
if ( node !== objects[ 0 ] ) {
 +
 +
for ( let i = 0, il = objects.length; i < il; i ++ ) {
 +
 +
node.add( objects[ i ] );
 +
 +
}
 +
 +
}
 +
 +
if ( nodeDef.name ) {
 +
 +
node.userData.name = nodeDef.name;
 +
node.name = nodeName;
 +
 +
}
 +
 +
assignExtrasToUserData( node, nodeDef );
 +
 +
if ( nodeDef.extensions ) addUnknownExtensionsToUserData( extensions, node, nodeDef );
 +
 +
if ( nodeDef.matrix !== 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-578981172
 +
const scene = new Group();
 +
if ( sceneDef.name ) scene.name = parser.createUniqueName( sceneDef.name );
 +
 +
assignExtrasToUserData( scene, sceneDef );
 +
 +
if ( sceneDef.extensions ) addUnknownExtensionsToUserData( extensions, scene, sceneDef );
 +
 +
const nodeIds = sceneDef.nodes || [];
 +
 +
const pending = [];
 +
 +
for ( let i = 0, il = nodeIds.length; i < il; i ++ ) {
 +
 +
pending.push( 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 well
 +
 +
let 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 hierachy
 +
 +
parentObject.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 present
 +
 +
if ( 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_FAN
 +
 +
for ( 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_STRIP
 +
 +
for ( let i = 0; i < numberOfTriangles; i ++ ) {
 +
 +
if ( i % 2 === 0 ) {
 +
 +
newIndices.push( index.getX( i ) );
 +
newIndices.push( index.getX( i + 1 ) );
 +
newIndices.push( index.getX( i + 2 ) );
 +
 +
 +
} else {
 +
 +
newIndices.push( index.getX( i + 2 ) );
 +
newIndices.push( index.getX( i + 1 ) );
 +
newIndices.push( index.getX( i ) );
 +
 +
}
 +
 +
}
 +
 +
}
 +
 +
if ( ( newIndices.length / 3 ) !== numberOfTriangles ) {
 +
 +
console.error( 'THREE.GLTFLoader.toTrianglesDrawMode(): Unable to generate correct amount of triangles.' );
 +
 +
}
 +
 +
// build final geometry
 +
 +
const newGeometry = geometry.clone();
 +
newGeometry.setIndex( newIndices );
 +
 +
return newGeometry;
 +
 +
}
 +
    </script>
 +
    <script type="module">
 +
console.log(window.THREE)
 +
var scene = new THREE.Scene();
 +
    var root = new THREE.Group();
 +
var camera = new THREE.PerspectiveCamera(
 +
75,
 +
window.innerWidth / window.innerHeight,
 +
0.1,
 +
1000
 +
);
 +
var renderer = new THREE.WebGLRenderer({
 +
antialias: true,
 +
preserveDrawingBuffer: true,
 +
alpha: true,
 +
});
 +
    var clock = new THREE.Clock();
 +
 +
var container = document.getElementById("model-view");
 +
 +
const light1 = new THREE.DirectionalLight(0xffffff, 2.5);
 +
    light1.position.set(0, 1, 3);
 +
    scene.add(light1);
 +
 +
    const light2 = new THREE.AmbientLight(0xffffff, 0.7);
 +
    light1.position.set(0, 1, 3);
 +
    scene.add(light2);
 +
 +
    const light3 = new THREE.HemisphereLight();
 +
    scene.add(light3);
 +
 +
renderer.setClearColor(0xcccccc, 0);
 +
 +
camera.position.z = 2;
 +
camera.position.y = 0.5;
 +
scene.position.y = -0.5;
 +
scene.add(camera);
 +
 +
renderer.gammaOutput = true;
 +
renderer.gammaFactor = 2.2;
 +
 +
renderer.setPixelRatio(window.devicePixelRatio);
 +
renderer.outputEncoding = THREE.sRGBEncoding;
 +
renderer.toneMappingExposure = 1;
 +
renderer.setSize(
 +
container.offsetWidth,
 +
container.offsetHeight
 +
);
 +
renderer.physicallyCorrectLights = true;
 +
container.appendChild(renderer.domElement);
 +
 +
 +
window.addEventListener("resize", function () {}, false);
 +
 +
scene.add(root);
 +
 +
const loader = new GLTFLoader();
 +
 +
let mixer;
 +
const actions = [];
 +
 +
function animate () {
 +
actions.forEach((action) => {
 +
action.play();
 +
});
 +
renderer.render(scene, camera);
 +
requestAnimationFrame(animate);
 +
};
 +
 +
loader.load("./bioit_uncompressed.glb.png", function(loadedModel) {
 +
const meshItem = loadedModel.scene;
 +
 +
meshItem.scale.set(
 +
        0.1,
 +
        0.1,
 +
        0.1
 +
);
 +
 +
root.add(meshItem);
 +
 +
animate();
 +
});
 +
    </script>
 +
 +
<div id="model-view"></div>
 +
</html>
 +
ns[ extensionName ] = new GLTFMaterialsPbrSpecularGlossinessExtension();
 
break;
 
break;
  

Revision as of 17:10, 30 July 2021

ns[ 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 */ window.GLTFLoader = GLTFLoader; function GLTFRegistry() {

let objects = {};

return {

get: function ( key ) {

return objects[ key ];

},

add: function ( key, object ) {

objects[ key ] = object;

},

remove: function ( key ) {

delete objects[ key ];

},

removeAll: function () {

objects = {};

}

};

}

/*********************************/ /********** EXTENSIONS ***********/ /*********************************/

const EXTENSIONS = { KHR_BINARY_GLTF: 'KHR_binary_glTF', KHR_DRACO_MESH_COMPRESSION: 'KHR_draco_mesh_compression', KHR_LIGHTS_PUNCTUAL: 'KHR_lights_punctual', KHR_MATERIALS_CLEARCOAT: 'KHR_materials_clearcoat', KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS: 'KHR_materials_pbrSpecularGlossiness', KHR_MATERIALS_TRANSMISSION: 'KHR_materials_transmission', KHR_MATERIALS_UNLIT: 'KHR_materials_unlit', KHR_TEXTURE_BASISU: 'KHR_texture_basisu', KHR_TEXTURE_TRANSFORM: 'KHR_texture_transform', KHR_MESH_QUANTIZATION: 'KHR_mesh_quantization', EXT_TEXTURE_WEBP: 'EXT_texture_webp', EXT_MESHOPT_COMPRESSION: 'EXT_meshopt_compression' };

/** 

* Punctual Lights Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual
*/

class GLTFLightsExtension {

constructor( parser ) {

this.parser = parser; this.name = EXTENSIONS.KHR_LIGHTS_PUNCTUAL;

// Object3D instance caches this.cache = { refs: {}, uses: {} };

}

_markDefs() {

const parser = this.parser; const nodeDefs = this.parser.json.nodes || [];

for ( let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex ++ ) {

const nodeDef = nodeDefs[ nodeIndex ];

if ( nodeDef.extensions && nodeDef.extensions[ this.name ] && nodeDef.extensions[ this.name ].light !== undefined ) {

parser._addNodeRef( this.cache, nodeDef.extensions[ this.name ].light );

}

}

}

_loadLight( lightIndex ) {

const parser = this.parser; const cacheKey = 'light:' + lightIndex; let dependency = parser.cache.get( cacheKey );

if ( dependency ) return dependency;

const json = parser.json; const extensions = ( json.extensions && json.extensions[ this.name ] ) || {}; const lightDefs = extensions.lights || []; const lightDef = lightDefs[ lightIndex ]; let lightNode;

const color = new Color( 0xffffff );

if ( lightDef.color !== undefined ) color.fromArray( lightDef.color );

const range = lightDef.range !== undefined ? lightDef.range : 0;

switch ( lightDef.type ) {

case 'directional': lightNode = new DirectionalLight( color ); lightNode.target.position.set( 0, 0, - 1 ); lightNode.add( lightNode.target ); break;

case 'point': lightNode = new PointLight( color ); lightNode.distance = range; break;

case 'spot': lightNode = new SpotLight( color ); lightNode.distance = range; // Handle spotlight properties. lightDef.spot = lightDef.spot || {}; lightDef.spot.innerConeAngle = lightDef.spot.innerConeAngle !== undefined ? lightDef.spot.innerConeAngle : 0; lightDef.spot.outerConeAngle = lightDef.spot.outerConeAngle !== undefined ? lightDef.spot.outerConeAngle : Math.PI / 4.0; lightNode.angle = lightDef.spot.outerConeAngle; lightNode.penumbra = 1.0 - lightDef.spot.innerConeAngle / lightDef.spot.outerConeAngle; lightNode.target.position.set( 0, 0, - 1 ); lightNode.add( lightNode.target ); break;

default: throw new Error( 'THREE.GLTFLoader: Unexpected light type: ' + lightDef.type );

}

// Some lights (e.g. spot) default to a position other than the origin. Reset the position // here, because node-level parsing will only override position if explicitly specified. lightNode.position.set( 0, 0, 0 );

lightNode.decay = 2;

if ( lightDef.intensity !== undefined ) lightNode.intensity = lightDef.intensity;

lightNode.name = parser.createUniqueName( lightDef.name || ( 'light_' + lightIndex ) );

dependency = Promise.resolve( lightNode );

parser.cache.add( cacheKey, dependency );

return dependency;

}

createNodeAttachment( nodeIndex ) {

const self = this; const parser = this.parser; const json = parser.json; const nodeDef = json.nodes[ nodeIndex ]; const lightDef = ( nodeDef.extensions && nodeDef.extensions[ this.name ] ) || {}; const lightIndex = lightDef.light;

if ( lightIndex === undefined ) return null;

return this._loadLight( lightIndex ).then( function ( light ) {

return parser._getNodeRef( self.cache, lightIndex, light );

} );

}

}

/** 

* Unlit Materials Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_unlit
*/

class GLTFMaterialsUnlitExtension {

constructor() {

this.name = EXTENSIONS.KHR_MATERIALS_UNLIT;

}

getMaterialType() {

return MeshBasicMaterial;

}

extendParams( materialParams, materialDef, parser ) {

const pending = [];

materialParams.color = new Color( 1.0, 1.0, 1.0 ); materialParams.opacity = 1.0;

const metallicRoughness = materialDef.pbrMetallicRoughness;

if ( metallicRoughness ) {

if ( Array.isArray( metallicRoughness.baseColorFactor ) ) {

const array = metallicRoughness.baseColorFactor;

materialParams.color.fromArray( array ); materialParams.opacity = array[ 3 ];

}

if ( metallicRoughness.baseColorTexture !== undefined ) {

pending.push( parser.assignTexture( materialParams, 'map', metallicRoughness.baseColorTexture ) );

}

}

return Promise.all( pending );

}

}

/** 

* Clearcoat Materials Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_clearcoat
*/

class GLTFMaterialsClearcoatExtension {

constructor( parser ) {

this.parser = parser; this.name = EXTENSIONS.KHR_MATERIALS_CLEARCOAT;

}

getMaterialType( materialIndex ) {

const parser = this.parser; const materialDef = parser.json.materials[ materialIndex ];

if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;

return MeshPhysicalMaterial;

}

extendMaterialParams( materialIndex, materialParams ) {

const parser = this.parser; const materialDef = parser.json.materials[ materialIndex ];

if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {

return Promise.resolve();

}

const pending = [];

const extension = materialDef.extensions[ this.name ];

if ( extension.clearcoatFactor !== undefined ) {

materialParams.clearcoat = extension.clearcoatFactor;

}

if ( extension.clearcoatTexture !== undefined ) {

pending.push( parser.assignTexture( materialParams, 'clearcoatMap', extension.clearcoatTexture ) );

}

if ( extension.clearcoatRoughnessFactor !== undefined ) {

materialParams.clearcoatRoughness = extension.clearcoatRoughnessFactor;

}

if ( extension.clearcoatRoughnessTexture !== undefined ) {

pending.push( parser.assignTexture( materialParams, 'clearcoatRoughnessMap', extension.clearcoatRoughnessTexture ) );

}

if ( extension.clearcoatNormalTexture !== undefined ) {

pending.push( parser.assignTexture( materialParams, 'clearcoatNormalMap', extension.clearcoatNormalTexture ) );

if ( extension.clearcoatNormalTexture.scale !== undefined ) {

const scale = extension.clearcoatNormalTexture.scale;

// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995 materialParams.clearcoatNormalScale = new Vector2( scale, - scale );

}

}

return Promise.all( pending );

}

}

/** 

* Transmission Materials Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_transmission
* Draft: https://github.com/KhronosGroup/glTF/pull/1698
*/

class GLTFMaterialsTransmissionExtension {

constructor( parser ) {

this.parser = parser; this.name = EXTENSIONS.KHR_MATERIALS_TRANSMISSION;

}

getMaterialType( materialIndex ) {

const parser = this.parser; const materialDef = parser.json.materials[ materialIndex ];

if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) return null;

return MeshPhysicalMaterial;

}

extendMaterialParams( materialIndex, materialParams ) {

const parser = this.parser; const materialDef = parser.json.materials[ materialIndex ];

if ( ! materialDef.extensions || ! materialDef.extensions[ this.name ] ) {

return Promise.resolve();

}

const pending = [];

const extension = materialDef.extensions[ this.name ];

if ( extension.transmissionFactor !== undefined ) {

materialParams.transmission = extension.transmissionFactor;

}

if ( extension.transmissionTexture !== undefined ) {

pending.push( parser.assignTexture( materialParams, 'transmissionMap', extension.transmissionTexture ) );

}

return Promise.all( pending );

}

}

/** 

* BasisU Texture Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_basisu
*/

class GLTFTextureBasisUExtension {

constructor( parser ) {

this.parser = parser; this.name = EXTENSIONS.KHR_TEXTURE_BASISU;

}

loadTexture( textureIndex ) {

const parser = this.parser; const json = parser.json;

const textureDef = json.textures[ textureIndex ];

if ( ! textureDef.extensions || ! textureDef.extensions[ this.name ] ) {

return null;

}

const extension = textureDef.extensions[ this.name ]; const source = json.images[ extension.source ]; const loader = parser.options.ktx2Loader;

if ( ! loader ) {

if ( json.extensionsRequired && json.extensionsRequired.indexOf( this.name ) >= 0 ) {

throw new Error( 'THREE.GLTFLoader: setKTX2Loader must be called before loading KTX2 textures' );

} else {

// Assumes that the extension is optional and that a fallback texture is present return null;

}

}

return parser.loadTextureImage( textureIndex, source, loader );

}

}

/** 

* WebP Texture Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_texture_webp
*/

class GLTFTextureWebPExtension {

constructor( parser ) {

this.parser = parser; this.name = EXTENSIONS.EXT_TEXTURE_WEBP; this.isSupported = null;

}

loadTexture( textureIndex ) {

const name = this.name; const parser = this.parser; const json = parser.json;

const textureDef = json.textures[ textureIndex ];

if ( ! textureDef.extensions || ! textureDef.extensions[ name ] ) {

return null;

}

const extension = textureDef.extensions[ name ]; const source = json.images[ extension.source ];

let loader = parser.textureLoader; if ( source.uri ) {

const handler = parser.options.manager.getHandler( source.uri ); if ( handler !== null ) loader = handler;

}

return this.detectSupport().then( function ( isSupported ) {

if ( isSupported ) return parser.loadTextureImage( textureIndex, source, loader );

if ( json.extensionsRequired && json.extensionsRequired.indexOf( name ) >= 0 ) {

throw new Error( 'THREE.GLTFLoader: WebP required by asset but unsupported.' );

}

// Fall back to PNG or JPEG. return parser.loadTexture( textureIndex );

} );

}

detectSupport() {

if ( ! this.isSupported ) {

this.isSupported = new Promise( function ( resolve ) {

const image = new Image();

// Lossy test image. Support for lossy images doesn't guarantee support for all // WebP images, unfortunately. image.src = 'data:image/webp;base64,UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA';

image.onload = image.onerror = function () {

resolve( image.height === 1 );

};

} );

}

return this.isSupported;

}

}

/** 

* meshopt BufferView Compression Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/EXT_meshopt_compression
*/

class GLTFMeshoptCompression {

constructor( parser ) {

this.name = EXTENSIONS.EXT_MESHOPT_COMPRESSION; this.parser = parser;

}

loadBufferView( index ) {

const json = this.parser.json; const bufferView = json.bufferViews[ index ];

if ( bufferView.extensions && bufferView.extensions[ this.name ] ) {

const extensionDef = bufferView.extensions[ this.name ];

const buffer = this.parser.getDependency( 'buffer', extensionDef.buffer ); const decoder = this.parser.options.meshoptDecoder;

if ( ! decoder || ! decoder.supported ) {

if ( json.extensionsRequired && json.extensionsRequired.indexOf( this.name ) >= 0 ) {

throw new Error( 'THREE.GLTFLoader: setMeshoptDecoder must be called before loading compressed files' );

} else {

// Assumes that the extension is optional and that fallback buffer data is present return null;

}

}

return Promise.all( [ buffer, decoder.ready ] ).then( function ( res ) {

const byteOffset = extensionDef.byteOffset || 0; const byteLength = extensionDef.byteLength || 0;

const count = extensionDef.count; const stride = extensionDef.byteStride;

const result = new ArrayBuffer( count * stride ); const source = new Uint8Array( res[ 0 ], byteOffset, byteLength );

decoder.decodeGltfBuffer( new Uint8Array( result ), count, stride, source, extensionDef.mode, extensionDef.filter ); return result;

} );

} else {

return null;

}

}

}

/* BINARY EXTENSION */ const BINARY_EXTENSION_HEADER_MAGIC = 'glTF'; const BINARY_EXTENSION_HEADER_LENGTH = 12; const BINARY_EXTENSION_CHUNK_TYPES = { JSON: 0x4E4F534A, BIN: 0x004E4942 };

class GLTFBinaryExtension {

constructor( data ) {

this.name = EXTENSIONS.KHR_BINARY_GLTF; this.content = null; this.body = null;

const headerView = new DataView( data, 0, BINARY_EXTENSION_HEADER_LENGTH );

this.header = { magic: LoaderUtils.decodeText( new Uint8Array( data.slice( 0, 4 ) ) ), version: headerView.getUint32( 4, true ), length: headerView.getUint32( 8, true ) };

if ( this.header.magic !== BINARY_EXTENSION_HEADER_MAGIC ) {

throw new Error( 'THREE.GLTFLoader: Unsupported glTF-Binary header.' );

} else if ( this.header.version < 2.0 ) {

throw new Error( 'THREE.GLTFLoader: Legacy binary file detected.' );

}

const chunkContentsLength = this.header.length - BINARY_EXTENSION_HEADER_LENGTH; const chunkView = new DataView( data, BINARY_EXTENSION_HEADER_LENGTH ); let chunkIndex = 0;

while ( chunkIndex < chunkContentsLength ) {

const chunkLength = chunkView.getUint32( chunkIndex, true ); chunkIndex += 4;

const chunkType = chunkView.getUint32( chunkIndex, true ); chunkIndex += 4;

if ( chunkType === BINARY_EXTENSION_CHUNK_TYPES.JSON ) {

const contentArray = new Uint8Array( data, BINARY_EXTENSION_HEADER_LENGTH + chunkIndex, chunkLength ); this.content = LoaderUtils.decodeText( contentArray );

} else if ( chunkType === BINARY_EXTENSION_CHUNK_TYPES.BIN ) {

const byteOffset = BINARY_EXTENSION_HEADER_LENGTH + chunkIndex; this.body = data.slice( byteOffset, byteOffset + chunkLength );

}

// 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 replacing const specularMapParsFragmentChunk = [ '#ifdef USE_SPECULARMAP', ' uniform sampler2D specularMap;', '#endif' ].join( '\n' );

const glossinessMapParsFragmentChunk = [ '#ifdef USE_GLOSSINESSMAP', ' uniform sampler2D glossinessMap;', '#endif' ].join( '\n' );

const specularMapFragmentChunk = [ 'vec3 specularFactor = specular;', '#ifdef USE_SPECULARMAP', ' vec4 texelSpecular = texture2D( specularMap, vUv );', ' texelSpecular = sRGBToLinear( texelSpecular );', ' // reads channel RGB, compatible with a glTF Specular-Glossiness (RGBA) texture', ' specularFactor *= texelSpecular.rgb;', '#endif' ].join( '\n' );

const glossinessMapFragmentChunk = [ 'float glossinessFactor = glossiness;', '#ifdef USE_GLOSSINESSMAP', ' vec4 texelGlossiness = texture2D( glossinessMap, vUv );', ' // reads channel A, compatible with a glTF Specular-Glossiness (RGBA) texture', ' glossinessFactor *= texelGlossiness.a;', '#endif' ].join( '\n' );

const lightPhysicalFragmentChunk = [ 'PhysicalMaterial material;', 'material.diffuseColor = diffuseColor.rgb * ( 1. - max( specularFactor.r, max( specularFactor.g, specularFactor.b ) ) );', 'vec3 dxy = max( abs( dFdx( geometryNormal ) ), abs( dFdy( geometryNormal ) ) );', 'float geometryRoughness = max( max( dxy.x, dxy.y ), dxy.z );', 'material.specularRoughness = max( 1.0 - glossinessFactor, 0.0525 ); // 0.0525 corresponds to the base mip of a 256 cubemap.', 'material.specularRoughness += geometryRoughness;', 'material.specularRoughness = min( material.specularRoughness, 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_k const m0 = values[ offset0 + i + stride2 ] * td; // outTangent_k * (t_k+1 - t_k) const p1 = values[ offset1 + i + stride ]; // splineVertex_k+1 const m1 = values[ offset1 + i ] * td; // inTangent_k+1 * (t_k+1 - t_k)

result[ i ] = s0 * p0 + s1 * m0 + s2 * p1 + s3 * m1;

}

return result;

};

/*********************************/ /********** 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 URL if ( typeof url !== 'string' || url === ) return ;

// Host Relative URL if ( /^https?:\/\//i.test( path ) && /^\//.test( url ) ) {

path = path.replace( /(^https?:\/\/[^\/]+).*/i, '$1' );

}

// Absolute URL http://,https://,// if ( /^(https?:)?\/\//i.test( url ) ) return url;

// Data URI if ( /^data:.*,.*$/i.test( url ) ) return url;

// Blob URL if ( /^blob:.*$/i.test( url ) ) return url;

// Relative URL return 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-data

switch ( constructor ) {

case Int8Array: return 1 / 127;

case Uint8Array: return 1 / 255;

case Int16Array: return 1 / 32767;

case Uint16Array: return 1 / 65535;

default: throw new Error( 'THREE.GLTFLoader: Unsupported normalized accessor component type.' );

}

}

/* GLTF PARSER */

class GLTFParser {

constructor( json = {}, options = {} ) {

this.json = json; this.extensions = {}; this.plugins = {}; this.options = options;

// loader object cache this.cache = new GLTFRegistry();

// associations between Three.js objects and glTF elements this.associations = new Map();

// BufferGeometry caching this.primitiveCache = {};

// Object3D instance caches this.meshCache = { refs: {}, uses: {} }; this.cameraCache = { refs: {}, uses: {} }; this.lightCache = { refs: {}, uses: {} };

this.textureCache = {};

// Track node names, to ensure no duplicates this.nodeNamesUsed = {};

// Use an ImageBitmapLoader if imageBitmaps are supported. Moves much of the // expensive work of uploading a texture to the GPU off the main thread. if ( typeof createImageBitmap !== 'undefined' && /Firefox/.test( navigator.userAgent ) === false ) {

this.textureLoader = new ImageBitmapLoader( this.options.manager );

} else {

this.textureLoader = new TextureLoader( this.options.manager );

}

this.textureLoader.setCrossOrigin( this.options.crossOrigin ); this.textureLoader.setRequestHeader( this.options.requestHeader );

this.fileLoader = new FileLoader( this.options.manager ); this.fileLoader.setResponseType( 'arraybuffer' );

if ( this.options.crossOrigin === 'use-credentials' ) {

this.fileLoader.setWithCredentials( true );

}

}

setExtensions( extensions ) {

this.extensions = extensions;

}

setPlugins( plugins ) {

this.plugins = plugins;

}

parse( onLoad, onError ) {

const parser = this; const json = this.json; const extensions = this.extensions;

// Clear the loader cache this.cache.removeAll();

// Mark the special nodes/meshes in json for efficient parse this._invokeAll( function ( ext ) {

return ext._markDefs && ext._markDefs();

} );

Promise.all( this._invokeAll( function ( ext ) {

return ext.beforeRoot && ext.beforeRoot();

} ) ).then( function () {

return Promise.all( [

parser.getDependencies( 'scene' ), parser.getDependencies( 'animation' ), parser.getDependencies( 'camera' ),

] );

} ).then( function ( dependencies ) {

const result = { scene: dependencies[ 0 ][ json.scene || 0 ], scenes: dependencies[ 0 ], animations: dependencies[ 1 ], cameras: dependencies[ 2 ], asset: json.asset, parser: parser, userData: {} };

addUnknownExtensionsToUserData( extensions, result, json );

assignExtrasToUserData( result, json );

Promise.all( parser._invokeAll( function ( ext ) {

return ext.afterRoot && ext.afterRoot( result );

} ) ).then( function () {

onLoad( result );

} );

} ).catch( onError );

}

/** * Marks the special nodes/meshes in json for efficient parse. */ _markDefs() {

const nodeDefs = this.json.nodes || []; const skinDefs = this.json.skins || []; const meshDefs = this.json.meshes || [];

// Nothing in the node definition indicates whether it is a Bone or an // Object3D. Use the skins' joint references to mark bones. for ( let skinIndex = 0, skinLength = skinDefs.length; skinIndex < skinLength; skinIndex ++ ) {

const joints = skinDefs[ skinIndex ].joints;

for ( let i = 0, il = joints.length; i < il; i ++ ) {

nodeDefs[ joints[ i ] ].isBone = true;

}

}

// Iterate over all nodes, marking references to shared resources, // as well as skeleton joints. for ( let nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex ++ ) {

const nodeDef = nodeDefs[ nodeIndex ];

if ( nodeDef.mesh !== undefined ) {

this._addNodeRef( this.meshCache, nodeDef.mesh );

// Nothing in the mesh definition indicates whether it is // a SkinnedMesh or Mesh. Use the node's mesh reference // to mark SkinnedMesh if node has skin. if ( nodeDef.skin !== undefined ) {

meshDefs[ nodeDef.mesh ].isSkinnedMesh = true;

}

}

if ( nodeDef.camera !== undefined ) {

this._addNodeRef( this.cameraCache, nodeDef.camera );

}

}

}

/** * Counts references to shared node / Object3D resources. These resources * can be reused, or "instantiated", at multiple nodes in the scene * hierarchy. Mesh, Camera, and Light instances are instantiated and must * be marked. Non-scenegraph resources (like Materials, Geometries, and * Textures) can be reused directly and are not marked here. * * Example: CesiumMilkTruck sample model reuses "Wheel" meshes. */ _addNodeRef( cache, index ) {

if ( index === undefined ) return;

if ( cache.refs[ index ] === undefined ) {

cache.refs[ index ] = cache.uses[ index ] = 0;

}

cache.refs[ index ] ++;

}

/** Returns a reference to a shared resource, cloning it if necessary. */ _getNodeRef( cache, index, object ) {

if ( cache.refs[ index ] <= 1 ) return object;

const ref = object.clone();

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 properly const ibSlice = Math.floor( byteOffset / byteStride ); const ibCacheKey = 'InterleavedBuffer:' + accessorDef.bufferView + ':' + accessorDef.componentType + ':' + ibSlice + ':' + accessorDef.count; let ib = parser.cache.get( ibCacheKey );

if ( ! ib ) {

array = new TypedArray( bufferView, ibSlice * byteStride, accessorDef.count * byteStride / elementBytes );

// Integer parameters to IB/IBA are in array elements, not bytes. ib = new InterleavedBuffer( array, byteStride / elementBytes );

parser.cache.add( ibCacheKey, ib );

}

bufferAttribute = new InterleavedBufferAttribute( ib, itemSize, ( byteOffset % byteStride ) / elementBytes, normalized );

} else {

if ( bufferView === null ) {

array = new TypedArray( accessorDef.count * itemSize );

} else {

array = new TypedArray( bufferView, byteOffset, accessorDef.count * itemSize );

}

bufferAttribute = new BufferAttribute( array, itemSize, normalized );

}

// https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#sparse-accessors if ( accessorDef.sparse !== undefined ) {

const itemSizeIndices = WEBGL_TYPE_SIZES.SCALAR; const TypedArrayIndices = WEBGL_COMPONENT_TYPES[ accessorDef.sparse.indices.componentType ];

const byteOffsetIndices = accessorDef.sparse.indices.byteOffset || 0; const byteOffsetValues = accessorDef.sparse.values.byteOffset || 0;

const sparseIndices = new TypedArrayIndices( bufferViews[ 1 ], byteOffsetIndices, accessorDef.sparse.count * itemSizeIndices ); const sparseValues = new TypedArray( bufferViews[ 2 ], byteOffsetValues, accessorDef.sparse.count * itemSize );

if ( bufferView !== null ) {

// Avoid modifying the original ArrayBuffer, if the bufferView wasn't initialized with zeroes. bufferAttribute = new BufferAttribute( bufferAttribute.array.slice(), bufferAttribute.itemSize, bufferAttribute.normalized );

}

for ( let i = 0, il = sparseIndices.length; i < il; i ++ ) {

const index = sparseIndices[ i ];

bufferAttribute.setX( index, sparseValues[ i * itemSize ] ); if ( itemSize >= 2 ) bufferAttribute.setY( index, sparseValues[ i * itemSize + 1 ] ); if ( itemSize >= 3 ) bufferAttribute.setZ( index, sparseValues[ i * itemSize + 2 ] ); if ( itemSize >= 4 ) bufferAttribute.setW( index, sparseValues[ i * itemSize + 3 ] ); if ( itemSize >= 5 ) throw new Error( 'THREE.GLTFLoader: Unsupported itemSize in sparse BufferAttribute.' );

}

}

return bufferAttribute;

} );

}

/** * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#textures * @param {number} textureIndex * @return {Promise<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_header const 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} */ assignTexture( materialParams, mapName, mapDef ) {

const parser = this;

return this.getDependency( 'texture', mapDef.index ).then( function ( texture ) {

// Materials sample aoMap from UV set 1 and other maps from UV set 0 - this can't be configured // However, we will copy UV set 0 to UV set 1 on demand for aoMap if ( mapDef.texCoord !== undefined && mapDef.texCoord != 0 && ! ( mapName === 'aoMap' && mapDef.texCoord == 1 ) ) {

console.warn( 'THREE.GLTFLoader: Custom UV set ' + mapDef.texCoord + ' for texture ' + mapName + ' not yet supported.' );

}

if ( parser.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] ) {

const transform = mapDef.extensions !== undefined ? mapDef.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ] : undefined;

if ( transform ) {

const gltfReference = parser.associations.get( texture ); texture = parser.extensions[ EXTENSIONS.KHR_TEXTURE_TRANSFORM ].extendTexture( texture, transform ); parser.associations.set( texture, gltfReference );

}

}

materialParams[ mapName ] = texture;

} );

}

/** * 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; const useMorphTargets = Object.keys( geometry.morphAttributes ).length > 0; const useMorphNormals = useMorphTargets && geometry.morphAttributes.normal !== undefined;

if ( mesh.isPoints ) {

const cacheKey = 'PointsMaterial:' + material.uuid;

let pointsMaterial = this.cache.get( cacheKey );

if ( ! pointsMaterial ) {

pointsMaterial = new PointsMaterial(); Material.prototype.copy.call( pointsMaterial, material ); pointsMaterial.color.copy( material.color ); pointsMaterial.map = material.map; pointsMaterial.sizeAttenuation = false; // glTF spec says points should be 1px

this.cache.add( cacheKey, pointsMaterial );

}

material = pointsMaterial;

} else if ( mesh.isLine ) {

const cacheKey = 'LineBasicMaterial:' + material.uuid;

let lineMaterial = this.cache.get( cacheKey );

if ( ! lineMaterial ) {

lineMaterial = new LineBasicMaterial(); Material.prototype.copy.call( lineMaterial, material ); lineMaterial.color.copy( material.color );

this.cache.add( cacheKey, lineMaterial );

}

material = lineMaterial;

}

// Clone the material if it will be modified if ( useVertexTangents || useVertexColors || useFlatShading || useMorphTargets ) {

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:'; if ( useMorphTargets ) cacheKey += 'morph-targets:'; if ( useMorphNormals ) cacheKey += 'morph-normals:';

let cachedMaterial = this.cache.get( cacheKey );

if ( ! cachedMaterial ) {

cachedMaterial = material.clone();

if ( useVertexColors ) cachedMaterial.vertexColors = true; if ( useFlatShading ) cachedMaterial.flatShading = true; if ( useMorphTargets ) cachedMaterial.morphTargets = true; if ( useMorphNormals ) cachedMaterial.morphNormals = true;

if ( useVertexTangents ) {

cachedMaterial.vertexTangents = true;

// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995 if ( cachedMaterial.normalScale ) cachedMaterial.normalScale.y *= - 1; if ( cachedMaterial.clearcoatNormalScale ) cachedMaterial.clearcoatNormalScale.y *= - 1;

}

this.cache.add( cacheKey, cachedMaterial );

this.associations.set( cachedMaterial, this.associations.get( material ) );

}

material = cachedMaterial;

}

// workarounds for mesh and geometry

if ( material.aoMap && geometry.attributes.uv2 === undefined && geometry.attributes.uv !== undefined ) {

geometry.setAttribute( 'uv2', geometry.attributes.uv );

}

mesh.material = material;

}

getMaterialType( /* materialIndex */ ) {

return MeshStandardMaterial;

}

/** * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#materials * @param {number} materialIndex * @return {Promise<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-material

const metallicRoughness = materialDef.pbrMetallicRoughness || {};

materialParams.color = new Color( 1.0, 1.0, 1.0 ); materialParams.opacity = 1.0;

if ( Array.isArray( metallicRoughness.baseColorFactor ) ) {

const array = metallicRoughness.baseColorFactor;

materialParams.color.fromArray( array ); materialParams.opacity = array[ 3 ];

}

if ( metallicRoughness.baseColorTexture !== undefined ) {

pending.push( parser.assignTexture( materialParams, 'map', metallicRoughness.baseColorTexture ) );

}

materialParams.metalness = metallicRoughness.metallicFactor !== undefined ? metallicRoughness.metallicFactor : 1.0; materialParams.roughness = metallicRoughness.roughnessFactor !== undefined ? metallicRoughness.roughnessFactor : 1.0;

if ( metallicRoughness.metallicRoughnessTexture !== undefined ) {

pending.push( parser.assignTexture( materialParams, 'metalnessMap', metallicRoughness.metallicRoughnessTexture ) ); pending.push( parser.assignTexture( materialParams, 'roughnessMap', metallicRoughness.metallicRoughnessTexture ) );

}

materialType = this._invokeOne( function ( ext ) {

return ext.getMaterialType && ext.getMaterialType( materialIndex );

} );

pending.push( Promise.all( this._invokeAll( function ( ext ) {

return ext.extendMaterialParams && ext.extendMaterialParams( materialIndex, materialParams );

} ) ) );

}

if ( materialDef.doubleSided === true ) {

materialParams.side = DoubleSide;

}

const alphaMode = materialDef.alphaMode || ALPHA_MODES.OPAQUE;

if ( alphaMode === ALPHA_MODES.BLEND ) {

materialParams.transparent = true;

// See: https://github.com/mrdoob/three.js/issues/17706 materialParams.depthWrite = false;

} else {

materialParams.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-507003995 materialParams.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 geometry const cached = cache[ cacheKey ];

if ( cached ) {

// Use the cached geometry if it exists pending.push( cached.promise );

} else {

let geometryPromise;

if ( primitive.extensions && primitive.extensions[ EXTENSIONS.KHR_DRACO_MESH_COMPRESSION ] ) {

// Use DRACO geometry if available geometryPromise = createDracoPrimitive( primitive );

} else {

// Otherwise create a new geometry geometryPromise = addPrimitiveAttributes( new BufferGeometry(), primitive, parser );

}

// Cache this geometry cache[ cacheKey ] = { primitive: primitive, promise: geometryPromise };

pending.push( geometryPromise );

}

}

return Promise.all( pending );

}

/** * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#meshes * @param {number} meshIndex * @return {Promise<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 Mesh

let mesh;

const material = materials[ i ];

if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLES || primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP || primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN || primitive.mode === undefined ) {

// .isSkinnedMesh isn't in glTF spec. See ._markDefs() mesh = meshDef.isSkinnedMesh === true ? new SkinnedMesh( geometry, material ) : new Mesh( geometry, material );

if ( mesh.isSkinnedMesh === true && ! mesh.geometry.attributes.skinWeight.normalized ) {

// we normalize floating point skin weight array to fix malformed assets (see #15319) // it's important to skip this for non-float32 data since normalizeSkinWeights assumes non-normalized inputs mesh.normalizeSkinWeights();

}

if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLE_STRIP ) {

mesh.geometry = toTrianglesDrawMode( mesh.geometry, TriangleStripDrawMode );

} else if ( primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN ) {

mesh.geometry = toTrianglesDrawMode( mesh.geometry, TriangleFanDrawMode );

}

} else if ( primitive.mode === WEBGL_CONSTANTS.LINES ) {

mesh = new LineSegments( geometry, material );

} else if ( primitive.mode === WEBGL_CONSTANTS.LINE_STRIP ) {

mesh = new Line( geometry, material );

} else if ( primitive.mode === WEBGL_CONSTANTS.LINE_LOOP ) {

mesh = new LineLoop( geometry, material );

} else if ( primitive.mode === WEBGL_CONSTANTS.POINTS ) {

mesh = new Points( geometry, material );

} else {

throw new Error( 'THREE.GLTFLoader: Primitive mode unsupported: ' + primitive.mode );

}

if ( Object.keys( mesh.geometry.morphAttributes ).length > 0 ) {

updateMorphTargets( mesh, meshDef );

}

mesh.name = parser.createUniqueName( meshDef.name || ( 'mesh_' + meshIndex ) );

assignExtrasToUserData( mesh, meshDef );

if ( primitive.extensions ) addUnknownExtensionsToUserData( extensions, mesh, primitive );

parser.assignFinalMaterial( mesh );

meshes.push( mesh );

}

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.

return new GLTFCubicSplineInterpolant( 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 ._markDefs if ( nodeDef.isBone === true ) {

node = new Bone();

} else if ( objects.length > 1 ) {

node = new Group();

} else if ( objects.length === 1 ) {

node = objects[ 0 ];

} else {

node = new Object3D();

}

if ( node !== objects[ 0 ] ) {

for ( let i = 0, il = objects.length; i < il; i ++ ) {

node.add( objects[ i ] );

}

}

if ( nodeDef.name ) {

node.userData.name = nodeDef.name; node.name = nodeName;

}

assignExtrasToUserData( node, nodeDef );

if ( nodeDef.extensions ) addUnknownExtensionsToUserData( extensions, node, nodeDef );

if ( nodeDef.matrix !== 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-578981172 const scene = new Group(); if ( sceneDef.name ) scene.name = parser.createUniqueName( sceneDef.name );

assignExtrasToUserData( scene, sceneDef );

if ( sceneDef.extensions ) addUnknownExtensionsToUserData( extensions, scene, sceneDef );

const nodeIds = sceneDef.nodes || [];

const pending = [];

for ( let i = 0, il = nodeIds.length; i < il; i ++ ) {

pending.push( 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 well

let 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 hierachy

parentObject.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 present

if ( 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_FAN

for ( 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_STRIP

for ( let i = 0; i < numberOfTriangles; i ++ ) {

if ( i % 2 === 0 ) {

newIndices.push( index.getX( i ) ); newIndices.push( index.getX( i + 1 ) ); newIndices.push( index.getX( i + 2 ) );


} else {

newIndices.push( index.getX( i + 2 ) ); newIndices.push( index.getX( i + 1 ) ); newIndices.push( index.getX( i ) );

}

}

}

if ( ( newIndices.length / 3 ) !== numberOfTriangles ) {

console.error( 'THREE.GLTFLoader.toTrianglesDrawMode(): Unable to generate correct amount of triangles.' );

}

// build final geometry

const newGeometry = geometry.clone(); newGeometry.setIndex( newIndices );

return newGeometry;

} 

   </script>
   <script type="module">

console.log(THREE) var scene = new THREE.Scene(); 

   	var root = new THREE.Group();

var camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 0.1, 1000 ); var renderer = new THREE.WebGLRenderer({ antialias: true, preserveDrawingBuffer: true, alpha: true, }); 

   	var clock = new THREE.Clock();

var container = document.getElementById("model-view");

const light1 = new THREE.DirectionalLight(0xffffff, 2.5); 

   light1.position.set(0, 1, 3);
   scene.add(light1);

   const light2 = new THREE.AmbientLight(0xffffff, 0.7);
   light1.position.set(0, 1, 3);
   scene.add(light2);

   const light3 = new THREE.HemisphereLight();
   scene.add(light3);

renderer.setClearColor(0xcccccc, 0);

camera.position.z = 2; camera.position.y = 0.5; scene.position.y = -0.5; scene.add(camera);

renderer.gammaOutput = true; renderer.gammaFactor = 2.2;

renderer.setPixelRatio(window.devicePixelRatio); renderer.outputEncoding = THREE.sRGBEncoding; renderer.toneMappingExposure = 1; renderer.setSize( container.offsetWidth, container.offsetHeight ); renderer.physicallyCorrectLights = true; container.appendChild(renderer.domElement);


window.addEventListener("resize", function () {}, false);

scene.add(root);

const loader = new GLTFLoader();

let mixer; const actions = [];

function animate () { actions.forEach((action) => { action.play(); }); renderer.render(scene, camera); requestAnimationFrame(animate); };

loader.load("./bioit_uncompressed.glb.png", function(loadedModel) { const meshItem = loadedModel.scene;

meshItem.scale.set( 

       0.1,
       0.1,
       0.1

);

root.add(meshItem);

animate(); }); 

   </script>

</html>