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GLTFLoader.js
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/**
* @author Rich Tibbett / https://github.com/richtr
* @author mrdoob / http://mrdoob.com/
* @author Tony Parisi / http://www.tonyparisi.com/
* @author Takahiro / https://github.com/takahirox
* @author Don McCurdy / https://www.donmccurdy.com
*/
THREE.GLTFLoader = ( function () {
function GLTFLoader( manager ) {
this.manager = ( manager !== undefined ) ? manager : THREE.DefaultLoadingManager;
}
GLTFLoader.prototype = {
constructor: GLTFLoader,
crossOrigin: 'Anonymous',
load: function ( url, onLoad, onProgress, onError ) {
var scope = this;
var path = this.path && ( typeof this.path === 'string' ) ? this.path : THREE.Loader.prototype.extractUrlBase( url );
var loader = new THREE.FileLoader( scope.manager );
loader.setResponseType( 'arraybuffer' );
loader.load( url, function ( data ) {
try {
scope.parse( data, path, onLoad, onError );
} catch ( e ) {
if ( onError !== undefined ) {
// For SyntaxError or TypeError, return a generic failure message.
onError( e.constructor === Error ? e : new Error( 'THREE.GLTFLoader: Unable to parse model.' ) );
}
}
}, onProgress, onError );
},
setCrossOrigin: function ( value ) {
this.crossOrigin = value;
},
setPath: function ( value ) {
this.path = value;
},
parse: function ( data, path, onLoad, onError ) {
var content;
var extensions = {};
var magic = convertUint8ArrayToString( new Uint8Array( data, 0, 4 ) );
if ( magic === BINARY_EXTENSION_HEADER_MAGIC ) {
extensions[ EXTENSIONS.KHR_BINARY_GLTF ] = new GLTFBinaryExtension( data );
content = extensions[ EXTENSIONS.KHR_BINARY_GLTF ].content;
} else {
content = convertUint8ArrayToString( new Uint8Array( data ) );
}
var json = JSON.parse( content );
if ( json.asset === undefined || json.asset.version[ 0 ] < 2 ) {
onError( new Error( 'THREE.GLTFLoader: Unsupported asset. glTF versions >=2.0 are supported.' ) );
return;
}
if ( json.extensionsUsed ) {
if ( json.extensionsUsed.indexOf( EXTENSIONS.KHR_LIGHTS ) >= 0 ) {
extensions[ EXTENSIONS.KHR_LIGHTS ] = new GLTFLightsExtension( json );
}
if ( json.extensionsUsed.indexOf( EXTENSIONS.KHR_MATERIALS_COMMON ) >= 0 ) {
extensions[ EXTENSIONS.KHR_MATERIALS_COMMON ] = new GLTFMaterialsCommonExtension( json );
}
if ( json.extensionsUsed.indexOf( EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ) >= 0 ) {
extensions[ EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS ] = new GLTFMaterialsPbrSpecularGlossinessExtension();
}
}
console.time( 'GLTFLoader' );
var parser = new GLTFParser( json, extensions, {
path: path || this.path,
crossOrigin: this.crossOrigin,
manager: this.manager
} );
parser.parse( function ( scene, scenes, cameras, animations ) {
console.timeEnd( 'GLTFLoader' );
var glTF = {
scene: scene,
scenes: scenes,
cameras: cameras,
animations: animations
};
onLoad( glTF );
}, onError );
}
};
/* GLTFREGISTRY */
function GLTFRegistry() {
var 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 ***********/
/*********************************/
var EXTENSIONS = {
KHR_BINARY_GLTF: 'KHR_binary_glTF',
KHR_LIGHTS: 'KHR_lights',
KHR_MATERIALS_COMMON: 'KHR_materials_common',
KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS: 'KHR_materials_pbrSpecularGlossiness'
};
/**
* Lights Extension
*
* Specification: PENDING
*/
function GLTFLightsExtension( json ) {
this.name = EXTENSIONS.KHR_LIGHTS;
this.lights = {};
var extension = ( json.extensions && json.extensions[ EXTENSIONS.KHR_LIGHTS ] ) || {};
var lights = extension.lights || {};
for ( var lightId in lights ) {
var light = lights[ lightId ];
var lightNode;
var color = new THREE.Color().fromArray( light.color );
switch ( light.type ) {
case 'directional':
lightNode = new THREE.DirectionalLight( color );
lightNode.position.set( 0, 0, 1 );
break;
case 'point':
lightNode = new THREE.PointLight( color );
break;
case 'spot':
lightNode = new THREE.SpotLight( color );
lightNode.position.set( 0, 0, 1 );
break;
case 'ambient':
lightNode = new THREE.AmbientLight( color );
break;
}
if ( lightNode ) {
if ( light.constantAttenuation !== undefined ) {
lightNode.intensity = light.constantAttenuation;
}
if ( light.linearAttenuation !== undefined ) {
lightNode.distance = 1 / light.linearAttenuation;
}
if ( light.quadraticAttenuation !== undefined ) {
lightNode.decay = light.quadraticAttenuation;
}
if ( light.fallOffAngle !== undefined ) {
lightNode.angle = light.fallOffAngle;
}
if ( light.fallOffExponent !== undefined ) {
console.warn( 'THREE.GLTFLoader:: light.fallOffExponent not currently supported.' );
}
lightNode.name = light.name || ( 'light_' + lightId );
this.lights[ lightId ] = lightNode;
}
}
}
/**
* Common Materials Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/Khronos/KHR_materials_common
*/
function GLTFMaterialsCommonExtension( json ) {
this.name = EXTENSIONS.KHR_MATERIALS_COMMON;
}
GLTFMaterialsCommonExtension.prototype.getMaterialType = function ( material ) {
var khrMaterial = material.extensions[ this.name ];
switch ( khrMaterial.type ) {
case 'commonBlinn' :
case 'commonPhong' :
return THREE.MeshPhongMaterial;
case 'commonLambert' :
return THREE.MeshLambertMaterial;
case 'commonConstant' :
default :
return THREE.MeshBasicMaterial;
}
};
GLTFMaterialsCommonExtension.prototype.extendParams = function ( materialParams, material, parser ) {
var khrMaterial = material.extensions[ this.name ];
var pending = [];
var keys = [];
// TODO: Currently ignored: 'ambientFactor', 'ambientTexture'
switch ( khrMaterial.type ) {
case 'commonBlinn' :
case 'commonPhong' :
keys.push( 'diffuseFactor', 'diffuseTexture', 'specularFactor', 'specularTexture', 'shininessFactor' );
break;
case 'commonLambert' :
keys.push( 'diffuseFactor', 'diffuseTexture' );
break;
case 'commonConstant' :
default :
break;
}
var materialValues = {};
keys.forEach( function ( v ) {
if ( khrMaterial[ v ] !== undefined ) materialValues[ v ] = khrMaterial[ v ];
} );
if ( materialValues.diffuseFactor !== undefined ) {
materialParams.color = new THREE.Color().fromArray( materialValues.diffuseFactor );
materialParams.opacity = materialValues.diffuseFactor[ 3 ];
}
if ( materialValues.diffuseTexture !== undefined ) {
pending.push( parser.assignTexture( materialParams, 'map', materialValues.diffuseTexture.index ) );
}
if ( materialValues.specularFactor !== undefined ) {
materialParams.specular = new THREE.Color().fromArray( materialValues.specularFactor );
}
if ( materialValues.specularTexture !== undefined ) {
pending.push( parser.assignTexture( materialParams, 'specularMap', materialValues.specularTexture.index ) );
}
if ( materialValues.shininessFactor !== undefined ) {
materialParams.shininess = materialValues.shininessFactor;
}
return Promise.all( pending );
};
/* BINARY EXTENSION */
var BINARY_EXTENSION_BUFFER_NAME = 'binary_glTF';
var BINARY_EXTENSION_HEADER_MAGIC = 'glTF';
var BINARY_EXTENSION_HEADER_LENGTH = 12;
var BINARY_EXTENSION_CHUNK_TYPES = { JSON: 0x4E4F534A, BIN: 0x004E4942 };
function GLTFBinaryExtension( data ) {
this.name = EXTENSIONS.KHR_BINARY_GLTF;
this.content = null;
this.body = null;
var headerView = new DataView( data, 0, BINARY_EXTENSION_HEADER_LENGTH );
this.header = {
magic: convertUint8ArrayToString( 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. Use GLTFLoader instead.' );
}
var chunkView = new DataView( data, BINARY_EXTENSION_HEADER_LENGTH );
var chunkIndex = 0;
while ( chunkIndex < chunkView.byteLength ) {
var chunkLength = chunkView.getUint32( chunkIndex, true );
chunkIndex += 4;
var chunkType = chunkView.getUint32( chunkIndex, true );
chunkIndex += 4;
if ( chunkType === BINARY_EXTENSION_CHUNK_TYPES.JSON ) {
var contentArray = new Uint8Array( data, BINARY_EXTENSION_HEADER_LENGTH + chunkIndex, chunkLength );
this.content = convertUint8ArrayToString( contentArray );
} else if ( chunkType === BINARY_EXTENSION_CHUNK_TYPES.BIN ) {
var 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.' );
}
}
/**
* Specular-Glossiness Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/Khronos/KHR_materials_pbrSpecularGlossiness
*/
function GLTFMaterialsPbrSpecularGlossinessExtension() {
return {
name: EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS,
specularGlossinessParams: [
'color',
'map',
'lightMap',
'lightMapIntensity',
'aoMap',
'aoMapIntensity',
'emissive',
'emissiveIntensity',
'emissiveMap',
'bumpMap',
'bumpScale',
'normalMap',
'displacementMap',
'displacementScale',
'displacementBias',
'specularMap',
'specular',
'glossinessMap',
'glossiness',
'alphaMap',
'envMap',
'envMapIntensity',
'refractionRatio',
],
getMaterialType: function () {
return THREE.ShaderMaterial;
},
extendParams: function ( params, material, parser ) {
var pbrSpecularGlossiness = material.extensions[ this.name ];
var shader = THREE.ShaderLib[ 'standard' ];
var uniforms = THREE.UniformsUtils.clone( shader.uniforms );
var specularMapParsFragmentChunk = [
'#ifdef USE_SPECULARMAP',
' uniform sampler2D specularMap;',
'#endif'
].join( '\n' );
var glossinessMapParsFragmentChunk = [
'#ifdef USE_GLOSSINESSMAP',
' uniform sampler2D glossinessMap;',
'#endif'
].join( '\n' );
var specularMapFragmentChunk = [
'vec3 specularFactor = specular;',
'#ifdef USE_SPECULARMAP',
' vec4 texelSpecular = texture2D( specularMap, vUv );',
' // reads channel RGB, compatible with a glTF Specular-Glossiness (RGBA) texture',
' specularFactor *= texelSpecular.rgb;',
'#endif'
].join( '\n' );
var 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' );
var lightPhysicalFragmentChunk = [
'PhysicalMaterial material;',
'material.diffuseColor = diffuseColor.rgb;',
'material.specularRoughness = clamp( 1.0 - glossinessFactor, 0.04, 1.0 );',
'material.specularColor = specularFactor.rgb;',
].join( '\n' );
var fragmentShader = shader.fragmentShader
.replace( '#include <specularmap_fragment>', '' )
.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 );
delete uniforms.roughness;
delete uniforms.metalness;
delete uniforms.roughnessMap;
delete uniforms.metalnessMap;
uniforms.specular = { value: new THREE.Color().setHex( 0x111111 ) };
uniforms.glossiness = { value: 0.5 };
uniforms.specularMap = { value: null };
uniforms.glossinessMap = { value: null };
params.vertexShader = shader.vertexShader;
params.fragmentShader = fragmentShader;
params.uniforms = uniforms;
params.defines = { 'STANDARD': '' };
params.color = new THREE.Color( 1.0, 1.0, 1.0 );
params.opacity = 1.0;
var pending = [];
if ( Array.isArray( pbrSpecularGlossiness.diffuseFactor ) ) {
var array = pbrSpecularGlossiness.diffuseFactor;
params.color.fromArray( array );
params.opacity = array[ 3 ];
}
if ( pbrSpecularGlossiness.diffuseTexture !== undefined ) {
pending.push( parser.assignTexture( params, 'map', pbrSpecularGlossiness.diffuseTexture.index ) );
}
params.emissive = new THREE.Color( 0.0, 0.0, 0.0 );
params.glossiness = pbrSpecularGlossiness.glossinessFactor !== undefined ? pbrSpecularGlossiness.glossinessFactor : 1.0;
params.specular = new THREE.Color( 1.0, 1.0, 1.0 );
if ( Array.isArray( pbrSpecularGlossiness.specularFactor ) ) {
params.specular.fromArray( pbrSpecularGlossiness.specularFactor );
}
if ( pbrSpecularGlossiness.specularGlossinessTexture !== undefined ) {
var specGlossIndex = pbrSpecularGlossiness.specularGlossinessTexture.index;
pending.push( parser.assignTexture( params, 'glossinessMap', specGlossIndex ) );
pending.push( parser.assignTexture( params, 'specularMap', specGlossIndex ) );
}
return Promise.all( pending );
},
createMaterial: function ( params ) {
// setup material properties based on MeshStandardMaterial for Specular-Glossiness
var material = new THREE.ShaderMaterial( {
defines: params.defines,
vertexShader: params.vertexShader,
fragmentShader: params.fragmentShader,
uniforms: params.uniforms,
fog: true,
lights: true,
opacity: params.opacity,
transparent: params.transparent
} );
material.isGLTFSpecularGlossinessMaterial = true;
material.color = params.color;
material.map = params.map === undefined ? null : params.map;
material.lightMap = null;
material.lightMapIntensity = 1.0;
material.aoMap = params.aoMap === undefined ? null : params.aoMap;
material.aoMapIntensity = 1.0;
material.emissive = params.emissive;
material.emissiveIntensity = 1.0;
material.emissiveMap = params.emissiveMap === undefined ? null : params.emissiveMap;
material.bumpMap = params.bumpMap === undefined ? null : params.bumpMap;
material.bumpScale = 1;
material.normalMap = params.normalMap === undefined ? null : params.normalMap;
if ( params.normalScale ) material.normalScale = params.normalScale;
material.displacementMap = null;
material.displacementScale = 1;
material.displacementBias = 0;
material.specularMap = params.specularMap === undefined ? null : params.specularMap;
material.specular = params.specular;
material.glossinessMap = params.glossinessMap === undefined ? null : params.glossinessMap;
material.glossiness = params.glossiness;
material.alphaMap = null;
material.envMap = params.envMap === undefined ? null : params.envMap;
material.envMapIntensity = 1.0;
material.refractionRatio = 0.98;
material.extensions.derivatives = true;
return material;
},
/**
* Clones a GLTFSpecularGlossinessMaterial instance. The ShaderMaterial.copy() method can
* copy only properties it knows about or inherits, and misses many properties that would
* normally be defined by MeshStandardMaterial.
*
* This method allows GLTFSpecularGlossinessMaterials to be cloned in the process of
* loading a glTF model, but cloning later (e.g. by the user) would require these changes
* AND also updating `.onBeforeRender` on the parent mesh.
*
* @param {THREE.ShaderMaterial} source
* @return {THREE.ShaderMaterial}
*/
cloneMaterial: function ( source ) {
var target = source.clone();
target.isGLTFSpecularGlossinessMaterial = true;
var params = this.specularGlossinessParams;
for ( var i = 0; i < params.length; i ++ ) {
target[ params[ i ] ] = source[ params[ i ] ];
}
return target;
},
// Here's based on refreshUniformsCommon() and refreshUniformsStandard() in WebGLRenderer.
refreshUniforms: function ( renderer, scene, camera, geometry, material, group ) {
var uniforms = material.uniforms;
var defines = material.defines;
uniforms.opacity.value = material.opacity;
uniforms.diffuse.value.copy( material.color );
uniforms.emissive.value.copy( material.emissive ).multiplyScalar( material.emissiveIntensity );
uniforms.map.value = material.map;
uniforms.specularMap.value = material.specularMap;
uniforms.alphaMap.value = material.alphaMap;
uniforms.lightMap.value = material.lightMap;
uniforms.lightMapIntensity.value = material.lightMapIntensity;
uniforms.aoMap.value = material.aoMap;
uniforms.aoMapIntensity.value = material.aoMapIntensity;
// uv repeat and offset setting priorities
// 1. color map
// 2. specular map
// 3. normal map
// 4. bump map
// 5. alpha map
// 6. emissive map
var uvScaleMap;
if ( material.map ) {
uvScaleMap = material.map;
} else if ( material.specularMap ) {
uvScaleMap = material.specularMap;
} else if ( material.displacementMap ) {
uvScaleMap = material.displacementMap;
} else if ( material.normalMap ) {
uvScaleMap = material.normalMap;
} else if ( material.bumpMap ) {
uvScaleMap = material.bumpMap;
} else if ( material.glossinessMap ) {
uvScaleMap = material.glossinessMap;
} else if ( material.alphaMap ) {
uvScaleMap = material.alphaMap;
} else if ( material.emissiveMap ) {
uvScaleMap = material.emissiveMap;
}
if ( uvScaleMap !== undefined ) {
// backwards compatibility
if ( uvScaleMap.isWebGLRenderTarget ) {
uvScaleMap = uvScaleMap.texture;
}
var offset;
var repeat;
if ( uvScaleMap.matrix !== undefined ) {
// > r88.
if ( uvScaleMap.matrixAutoUpdate === true ) {
offset = uvScaleMap.offset;
repeat = uvScaleMap.repeat;
var rotation = uvScaleMap.rotation;
var center = uvScaleMap.center;
uvScaleMap.matrix.setUvTransform( offset.x, offset.y, repeat.x, repeat.y, rotation, center.x, center.y );
}
uniforms.uvTransform.value.copy( uvScaleMap.matrix );
} else {
// <= r87. Remove when reasonable.
offset = uvScaleMap.offset;
repeat = uvScaleMap.repeat;
uniforms.offsetRepeat.value.set( offset.x, offset.y, repeat.x, repeat.y );
}
}
uniforms.envMap.value = material.envMap;
uniforms.envMapIntensity.value = material.envMapIntensity;
uniforms.flipEnvMap.value = ( material.envMap && material.envMap.isCubeTexture ) ? - 1 : 1;
uniforms.refractionRatio.value = material.refractionRatio;
uniforms.specular.value.copy( material.specular );
uniforms.glossiness.value = material.glossiness;
uniforms.glossinessMap.value = material.glossinessMap;
uniforms.emissiveMap.value = material.emissiveMap;
uniforms.bumpMap.value = material.bumpMap;
uniforms.normalMap.value = material.normalMap;
uniforms.displacementMap.value = material.displacementMap;
uniforms.displacementScale.value = material.displacementScale;
uniforms.displacementBias.value = material.displacementBias;
if ( uniforms.glossinessMap.value !== null && defines.USE_GLOSSINESSMAP === undefined ) {
defines.USE_GLOSSINESSMAP = '';
// set USE_ROUGHNESSMAP to enable vUv
defines.USE_ROUGHNESSMAP = '';
}
if ( uniforms.glossinessMap.value === null && defines.USE_GLOSSINESSMAP !== undefined ) {
delete defines.USE_GLOSSINESSMAP;
delete defines.USE_ROUGHNESSMAP;
}
}
};
}
/*********************************/
/********** INTERNALS ************/
/*********************************/
var WEBGL_TYPE_SIZES = {
'SCALAR': 1,
'VEC2': 2,
'VEC3': 3,
'VEC4': 4,
'MAT2': 4,
'MAT3': 9,
'MAT4': 16
};
var PATH_PROPERTIES = {
scale: 'scale',
translation: 'position',
rotation: 'quaternion',
weights: 'morphTargetInfluences'
};
var INTERPOLATION = {
CATMULLROMSPLINE: THREE.InterpolateSmooth,
CUBICSPLINE: THREE.InterpolateSmooth,
LINEAR: THREE.InterpolateLinear,
STEP: THREE.InterpolateDiscrete
};
var STATES_ENABLES = {
2884: 'CULL_FACE',
2929: 'DEPTH_TEST',
3042: 'BLEND',
3089: 'SCISSOR_TEST',
32823: 'POLYGON_OFFSET_FILL',
32926: 'SAMPLE_ALPHA_TO_COVERAGE'
};
var ALPHA_MODES = {
OPAQUE: 'OPAQUE',
MASK: 'MASK',
BLEND: 'BLEND'
};
/* UTILITY FUNCTIONS */
function _each( object, callback, thisObj ) {
if ( ! object ) {
return Promise.resolve();
}
var results;
var fns = [];
if ( Object.prototype.toString.call( object ) === '[object Array]' ) {
results = [];
var length = object.length;
for ( var idx = 0; idx < length; idx ++ ) {
var value = callback.call( thisObj || this, object[ idx ], idx );
if ( value ) {
fns.push( value );
if ( value instanceof Promise ) {
value.then( function ( key, value ) {
results[ key ] = value;
}.bind( this, idx ) );
} else {
results[ idx ] = value;
}
}
}
} else {
results = {};
for ( var key in object ) {
if ( object.hasOwnProperty( key ) ) {
var value = callback.call( thisObj || this, object[ key ], key );
if ( value ) {
fns.push( value );
if ( value instanceof Promise ) {
value.then( function ( key, value ) {
results[ key ] = value;
}.bind( this, key ) );
} else {
results[ key ] = value;
}
}
}
}
}
return Promise.all( fns ).then( function () {
return results;
} );
}
function resolveURL( url, path ) {
// Invalid URL
if ( typeof url !== 'string' || url === '' )
return '';
// 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;
}
function convertUint8ArrayToString( array ) {