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gltf-three.js
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gltf-three.js
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/**
* Subset of glTF / VRM extension - THREE.js object mapper.
*
* Omits some components that aren't useful for VRM.
* i.e.:
* - remote resource fetch (glTF in VRM always contains all resource in single blob)
* - assume glTF V2 (no KHR_BINARY_GLTF)
*
* @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
* @author xyx / https://github.com/xanxys/
*/
export class GLTFLoader {
constructor() {
this.manager = THREE.DefaultLoadingManager;
this.dracoLoader = null;
this.crossOrigin = 'anonymous';
}
setDRACOLoader(dracoLoader) {
this.dracoLoader = dracoLoader;
return this;
}
/**
* @param {Object} json: glTF main content
* @param {ArrayBuffer} buffer: glTF bin buffer (first one)
* @returns {Promise<Object>}
*/
parse(json, buffer) {
if (json.asset === undefined || json.asset.version[0] < 2) {
throw new Error('THREE.GLTFLoader: Unsupported asset. glTF versions >=2.0 are supported. Use LegacyGLTFLoader instead.');
}
const extensions = {};
extensions[EXTENSIONS.KHR_BINARY_GLTF] = new GLTFBinaryExtension(buffer);
if (json.extensionsUsed) {
for (var i = 0; i < json.extensionsUsed.length; ++i) {
var extensionName = json.extensionsUsed[i];
var extensionsRequired = json.extensionsRequired || [];
switch (extensionName) {
case EXTENSIONS.KHR_LIGHTS_PUNCTUAL:
extensions[extensionName] = new GLTFLightsExtension(json);
break;
case EXTENSIONS.KHR_MATERIALS_UNLIT:
extensions[extensionName] = new GLTFMaterialsUnlitExtension(json);
break;
case EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS:
extensions[extensionName] = new GLTFMaterialsPbrSpecularGlossinessExtension(json);
break;
case EXTENSIONS.KHR_DRACO_MESH_COMPRESSION:
extensions[extensionName] = new GLTFDracoMeshCompressionExtension(json, this.dracoLoader);
break;
case EXTENSIONS.MSFT_TEXTURE_DDS:
extensions[EXTENSIONS.MSFT_TEXTURE_DDS] = new GLTFTextureDDSExtension();
break;
case EXTENSIONS.KHR_TEXTURE_TRANSFORM:
extensions[EXTENSIONS.KHR_TEXTURE_TRANSFORM] = new GLTFTextureTransformExtension(json);
break;
default:
if (extensionsRequired.indexOf(extensionName) >= 0) {
console.warn('THREE.GLTFLoader: Unknown extension "' + extensionName + '".');
}
}
}
}
return new GLTFParser(json, extensions).parse();
}
}
// deprecated
function GLTFBinaryExtension(buffer) {
this.name = EXTENSIONS.KHR_BINARY_GLTF;
this.body = buffer; // single ArrayBuffer (bin chunk data)
}
/*********************************/
/********** EXTENSIONS ***********/
/*********************************/
var EXTENSIONS = {
KHR_BINARY_GLTF: 'KHR_binary_glTF',
KHR_DRACO_MESH_COMPRESSION: 'KHR_draco_mesh_compression',
KHR_LIGHTS_PUNCTUAL: 'KHR_lights_punctual',
KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS: 'KHR_materials_pbrSpecularGlossiness',
KHR_MATERIALS_UNLIT: 'KHR_materials_unlit',
KHR_TEXTURE_TRANSFORM: 'KHR_texture_transform',
MSFT_TEXTURE_DDS: 'MSFT_texture_dds'
};
/**
* DDS Texture Extension
*
* Specification:
* https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Vendor/MSFT_texture_dds
*
*/
function GLTFTextureDDSExtension() {
if (!THREE.DDSLoader) {
throw new Error('THREE.GLTFLoader: Attempting to load .dds texture without importing THREE.DDSLoader');
}
this.name = EXTENSIONS.MSFT_TEXTURE_DDS;
this.ddsLoader = new THREE.DDSLoader();
}
/**
* Lights Extension
*
* Specification: PENDING
*/
function GLTFLightsExtension(json) {
this.name = EXTENSIONS.KHR_LIGHTS_PUNCTUAL;
var extension = (json.extensions && json.extensions[EXTENSIONS.KHR_LIGHTS_PUNCTUAL]) || {};
this.lightDefs = extension.lights || [];
}
GLTFLightsExtension.prototype.loadLight = function (lightIndex) {
var lightDef = this.lightDefs[lightIndex];
var lightNode;
var color = new THREE.Color(0xffffff);
if (lightDef.color !== undefined) color.fromArray(lightDef.color);
var range = lightDef.range !== undefined ? lightDef.range : 0;
switch (lightDef.type) {
case 'directional':
lightNode = new THREE.DirectionalLight(color);
lightNode.target.position.set(0, 0, - 1);
lightNode.add(lightNode.target);
break;
case 'point':
lightNode = new THREE.PointLight(color);
lightNode.distance = range;
break;
case 'spot':
lightNode = new THREE.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 = lightDef.name || ('light_' + lightIndex);
return Promise.resolve(lightNode);
};
/**
* Unlit Materials Extension (pending)
*
* PR: https://github.com/KhronosGroup/glTF/pull/1163
*/
function GLTFMaterialsUnlitExtension(json) {
this.name = EXTENSIONS.KHR_MATERIALS_UNLIT;
}
GLTFMaterialsUnlitExtension.prototype.getMaterialType = function (material) {
return THREE.MeshBasicMaterial;
};
GLTFMaterialsUnlitExtension.prototype.extendParams = function (materialParams, material, parser) {
var pending = [];
materialParams.color = new THREE.Color(1.0, 1.0, 1.0);
materialParams.opacity = 1.0;
var metallicRoughness = material.pbrMetallicRoughness;
if (metallicRoughness) {
if (Array.isArray(metallicRoughness.baseColorFactor)) {
var 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);
};
/**
* DRACO Mesh Compression Extension
*
* Specification: https://github.com/KhronosGroup/glTF/pull/874
*/
function GLTFDracoMeshCompressionExtension(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;
}
GLTFDracoMeshCompressionExtension.prototype.decodePrimitive = function (primitive, parser) {
var json = this.json;
var dracoLoader = this.dracoLoader;
var bufferViewIndex = primitive.extensions[this.name].bufferView;
var gltfAttributeMap = primitive.extensions[this.name].attributes;
var threeAttributeMap = {};
var attributeNormalizedMap = {};
var attributeTypeMap = {};
for (var attributeName in gltfAttributeMap) {
var threeAttributeName = ATTRIBUTES[attributeName] || attributeName.toLowerCase();
threeAttributeMap[threeAttributeName] = gltfAttributeMap[attributeName];
}
for (attributeName in primitive.attributes) {
var threeAttributeName = ATTRIBUTES[attributeName] || attributeName.toLowerCase();
if (gltfAttributeMap[attributeName] !== undefined) {
var accessorDef = json.accessors[primitive.attributes[attributeName]];
var componentType = WEBGL_COMPONENT_TYPES[accessorDef.componentType];
attributeTypeMap[threeAttributeName] = componentType;
attributeNormalizedMap[threeAttributeName] = accessorDef.normalized === true;
}
}
return parser.getDependency('bufferView', bufferViewIndex).then(bufferView => {
return new Promise(resolve => {
dracoLoader.decodeDracoFile(bufferView, geometry => {
for (var attributeName in geometry.attributes) {
var attribute = geometry.attributes[attributeName];
var normalized = attributeNormalizedMap[attributeName];
if (normalized !== undefined) attribute.normalized = normalized;
}
resolve(geometry);
}, threeAttributeMap, attributeTypeMap);
});
});
};
/**
* Texture Transform Extension
*
* Specification:
*/
function GLTFTextureTransformExtension(json) {
this.name = EXTENSIONS.KHR_TEXTURE_TRANSFORM;
}
GLTFTextureTransformExtension.prototype.extendTexture = function (texture, transform) {
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);
}
if (transform.texCoord !== undefined) {
console.warn('THREE.GLTFLoader: Custom UV sets in "' + this.name + '" extension not yet supported.');
}
texture.needsUpdate = true;
return texture;
};
/**
* Specular-Glossiness Extension
*
* Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/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 );',
' texelSpecular = sRGBToLinear( texelSpecular );',
' // 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('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));
}
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 specGlossMapDef = pbrSpecularGlossiness.specularGlossinessTexture;
pending.push(parser.assignTexture(params, 'glossinessMap', specGlossMapDef));
pending.push(parser.assignTexture(params, 'specularMap', specGlossMapDef));
}
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, il = params.length; i < il; 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) {
if (material.isGLTFSpecularGlossinessMaterial !== true) {
return;
}
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;
}
if (uvScaleMap.matrixAutoUpdate === true) {
uvScaleMap.updateMatrix();
}
uniforms.uvTransform.value.copy(uvScaleMap.matrix);
}
if (material.envMap) {
uniforms.envMap.value = material.envMap;
uniforms.envMapIntensity.value = material.envMapIntensity;
// don't flip CubeTexture envMaps, flip everything else:
// WebGLRenderTargetCube will be flipped for backwards compatibility
// WebGLRenderTargetCube.texture will be flipped because it's a Texture and NOT a CubeTexture
// this check must be handled differently, or removed entirely, if WebGLRenderTargetCube uses a CubeTexture in the future
uniforms.flipEnvMap.value = material.envMap.isCubeTexture ? - 1 : 1;
uniforms.reflectivity.value = material.reflectivity;
uniforms.refractionRatio.value = material.refractionRatio;
uniforms.maxMipLevel.value = renderer.properties.get(material.envMap).__maxMipLevel;
}
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;
}
}
};
}
/*********************************/
/********** INTERPOLATION ********/
/*********************************/
// Spline Interpolation
// Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#appendix-c-spline-interpolation
function GLTFCubicSplineInterpolant(parameterPositions, sampleValues, sampleSize, resultBuffer) {
THREE.Interpolant.call(this, parameterPositions, sampleValues, sampleSize, resultBuffer);
}
GLTFCubicSplineInterpolant.prototype = Object.create(THREE.Interpolant.prototype);
GLTFCubicSplineInterpolant.prototype.constructor = GLTFCubicSplineInterpolant;
GLTFCubicSplineInterpolant.prototype.copySampleValue_ = function (index) {
// Copies a sample value to the result buffer. See description of glTF
// CUBICSPLINE values layout in interpolate_() function below.
var result = this.resultBuffer,
values = this.sampleValues,
valueSize = this.valueSize,
offset = index * valueSize * 3 + valueSize;
for (var 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) {
var result = this.resultBuffer;
var values = this.sampleValues;
var stride = this.valueSize;
var stride2 = stride * 2;
var stride3 = stride * 3;
var td = t1 - t0;
var p = (t - t0) / td;
var pp = p * p;
var ppp = pp * p;
var offset1 = i1 * stride3;
var offset0 = offset1 - stride3;
var s2 = - 2 * ppp + 3 * pp;
var s3 = ppp - pp;
var s0 = 1 - s2;
var s1 = s3 - pp + p;
// Layout of keyframe output values for CUBICSPLINE animations:
// [ inTangent_1, splineVertex_1, outTangent_1, inTangent_2, splineVertex_2, ... ]
for (var i = 0; i !== stride; i++) {
var p0 = values[offset0 + i + stride]; // splineVertex_k
var m0 = values[offset0 + i + stride2] * td; // outTangent_k * (t_k+1 - t_k)
var p1 = values[offset1 + i + stride]; // splineVertex_k+1
var 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 */
export 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
};
var WEBGL_TYPE = {
5126: Number,
//35674: THREE.Matrix2,
35675: THREE.Matrix3,
35676: THREE.Matrix4,
35664: THREE.Vector2,
35665: THREE.Vector3,
35666: THREE.Vector4,
35678: THREE.Texture
};
var WEBGL_COMPONENT_TYPES = {
5120: Int8Array,
5121: Uint8Array,
5122: Int16Array,
5123: Uint16Array,
5125: Uint32Array,
5126: Float32Array
};
var WEBGL_FILTERS = {
9728: THREE.NearestFilter,
9729: THREE.LinearFilter,
9984: THREE.NearestMipMapNearestFilter,
9985: THREE.LinearMipMapNearestFilter,
9986: THREE.NearestMipMapLinearFilter,
9987: THREE.LinearMipMapLinearFilter
};
var WEBGL_WRAPPINGS = {
33071: THREE.ClampToEdgeWrapping,
33648: THREE.MirroredRepeatWrapping,
10497: THREE.RepeatWrapping
};
var WEBGL_SIDES = {
1028: THREE.BackSide, // Culling front
1029: THREE.FrontSide // Culling back
//1032: THREE.NoSide // Culling front and back, what to do?
};
var WEBGL_DEPTH_FUNCS = {
512: THREE.NeverDepth,
513: THREE.LessDepth,
514: THREE.EqualDepth,
515: THREE.LessEqualDepth,
516: THREE.GreaterEqualDepth,
517: THREE.NotEqualDepth,
518: THREE.GreaterEqualDepth,
519: THREE.AlwaysDepth
};
var WEBGL_BLEND_EQUATIONS = {
32774: THREE.AddEquation,
32778: THREE.SubtractEquation,
32779: THREE.ReverseSubtractEquation
};
var WEBGL_BLEND_FUNCS = {
0: THREE.ZeroFactor,
1: THREE.OneFactor,
768: THREE.SrcColorFactor,
769: THREE.OneMinusSrcColorFactor,
770: THREE.SrcAlphaFactor,
771: THREE.OneMinusSrcAlphaFactor,
772: THREE.DstAlphaFactor,
773: THREE.OneMinusDstAlphaFactor,
774: THREE.DstColorFactor,
775: THREE.OneMinusDstColorFactor,
776: THREE.SrcAlphaSaturateFactor
// The followings are not supported by Three.js yet
//32769: CONSTANT_COLOR,
//32770: ONE_MINUS_CONSTANT_COLOR,
//32771: CONSTANT_ALPHA,
//32772: ONE_MINUS_CONSTANT_COLOR
};
var WEBGL_TYPE_SIZES = {
'SCALAR': 1,
'VEC2': 2,
'VEC3': 3,
'VEC4': 4,
'MAT2': 4,
'MAT3': 9,
'MAT4': 16
};
var ATTRIBUTES = {
POSITION: 'position',
NORMAL: 'normal',
TANGENT: 'tangent',
TEXCOORD_0: 'uv',
TEXCOORD_1: 'uv2',
COLOR_0: 'color',
WEIGHTS_0: 'skinWeight',
JOINTS_0: 'skinIndex',
};
var PATH_PROPERTIES = {
scale: 'scale',
translation: 'position',
rotation: 'quaternion',
weights: 'morphTargetInfluences'
};
var 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: 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'
};
var MIME_TYPE_FORMATS = {
'image/png': THREE.RGBAFormat,
'image/jpeg': THREE.RGBFormat
};
var defaultMaterial;
/**
* Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#default-material
*/
function createDefaultMaterial() {
defaultMaterial = defaultMaterial || new THREE.MeshStandardMaterial({