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JavaScript

THREE.GLTFLoader = (function() {

function GLTFLoader(manager) {

THREE.Loader.call(this, manager);

this.dracoLoader = null;
        this.ddsLoader = null;

}

GLTFLoader.prototype = Object.assign(Object.create(THREE.Loader.prototype), {

constructor: GLTFLoader,

load: function(url, onLoad, onProgress, onError) {

var scope = this;

var resourcePath;

if (this.resourcePath !== '') {

resourcePath = this.resourcePath;

} else if (this.path !== '') {

resourcePath = this.path;

} else {

resourcePath = THREE.LoaderUtils.extractUrlBase(url);

}

// Tells the LoadingManager to track an extra item, which resolves after
            // the model is fully loaded. This means the count of items loaded will
            // be incorrect, but ensures manager.onLoad() does not fire early.
            scope.manager.itemStart(url);

var _onError = function(e) {

if (onError) {

onError(e);

} else {

console.error(e);

}

scope.manager.itemError(url);
                scope.manager.itemEnd(url);

};

var loader = new THREE.FileLoader(scope.manager);

loader.setPath(this.path);
            loader.setResponseType('arraybuffer');

if (scope.crossOrigin === 'use-credentials') {

loader.setWithCredentials(true);

}

loader.load(url, function(data) {

try {

scope.parse(data, resourcePath, function(gltf) {

onLoad(gltf);

scope.manager.itemEnd(url);

}, _onError);

} catch (e) {

_onError(e);

}

}, onProgress, _onError);

setDRACOLoader: function(dracoLoader) {

this.dracoLoader = dracoLoader;
            return this;

setDDSLoader: function(ddsLoader) {

this.ddsLoader = ddsLoader;
            return this;

parse: function(data, path, onLoad, onError) {

var content;
            var extensions = {};

if (typeof data === 'string') {

content = data;

} else {

var magic = THREE.LoaderUtils.decodeText(new Uint8Array(data, 0, 4));

if (magic === BINARY_EXTENSION_HEADER_MAGIC) {

try {

extensions[EXTENSIONS.KHR_BINARY_GLTF] = new GLTFBinaryExtension(data);

} catch (error) {

if (onError) onError(error);
                        return;

}

content = extensions[EXTENSIONS.KHR_BINARY_GLTF].content;

} else {

content = THREE.LoaderUtils.decodeText(new Uint8Array(data));

}

var json = JSON.parse(content);

if (json.asset === undefined || json.asset.version[0] < 2) {

if (onError) onError(new Error('THREE.GLTFLoader: Unsupported asset. glTF versions >=2.0 are supported.'));
                return;

}

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();
                            break;

case EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS:
                            extensions[extensionName] = new GLTFMaterialsPbrSpecularGlossinessExtension();
                            break;

case EXTENSIONS.KHR_DRACO_MESH_COMPRESSION:
                            extensions[extensionName] = new GLTFDracoMeshCompressionExtension(json, this.dracoLoader);
                            break;

case EXTENSIONS.MSFT_TEXTURE_DDS:
                            extensions[extensionName] = new GLTFTextureDDSExtension(this.ddsLoader);
                            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) {

console.warn('THREE.GLTFLoader: Unknown extension "' + extensionName + '".');

}

var parser = new GLTFParser(json, extensions, {

path: path || this.resourcePath || '',
                crossOrigin: this.crossOrigin,
                manager: this.manager

});

parser.parse(onLoad, 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_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',
        KHR_MESH_QUANTIZATION: 'KHR_mesh_quantization',
        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(ddsLoader) {

if (!ddsLoader) {

throw new Error('THREE.GLTFLoader: Attempting to load .dds texture without importing THREE.DDSLoader');

}

this.name = EXTENSIONS.MSFT_TEXTURE_DDS;
        this.ddsLoader = ddsLoader;

}

/**
     * Punctual Lights Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_lights_punctual
     */
    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
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_unlit
     */
    function GLTFMaterialsUnlitExtension() {

this.name = EXTENSIONS.KHR_MATERIALS_UNLIT;

}

GLTFMaterialsUnlitExtension.prototype.getMaterialType = function() {

return THREE.MeshBasicMaterial;

};

GLTFMaterialsUnlitExtension.prototype.extendParams = function(materialParams, materialDef, parser) {

var pending = [];

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

var metallicRoughness = materialDef.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);

};

/* BINARY EXTENSION */
    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: THREE.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.');

}

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 = THREE.LoaderUtils.decodeText(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.');

}

/**
     * DRACO Mesh Compression Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_draco_mesh_compression
     */
    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;
        this.dracoLoader.preload();

}

GLTFDracoMeshCompressionExtension.prototype.decodePrimitive = function(primitive, parser) {

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(function(bufferView) {

return new Promise(function(resolve) {

dracoLoader.decodeDracoFile(bufferView, function(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: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_texture_transform
     */
    function GLTFTextureTransformExtension() {

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(materialParams, materialDef, parser) {

var pbrSpecularGlossiness = materialDef.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
                };

materialParams.vertexShader = shader.vertexShader;
                materialParams.fragmentShader = fragmentShader;
                materialParams.uniforms = uniforms;
                materialParams.defines = {
                    'STANDARD': ''
                };

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

var pending = [];

if (Array.isArray(pbrSpecularGlossiness.diffuseFactor)) {

var 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 THREE.Color(0.0, 0.0, 0.0);
                materialParams.glossiness = pbrSpecularGlossiness.glossinessFactor !== undefined ? pbrSpecularGlossiness.glossinessFactor : 1.0;
                materialParams.specular = new THREE.Color(1.0, 1.0, 1.0);

if (Array.isArray(pbrSpecularGlossiness.specularFactor)) {

materialParams.specular.fromArray(pbrSpecularGlossiness.specularFactor);

}

if (pbrSpecularGlossiness.specularGlossinessTexture !== undefined) {

var specGlossMapDef = pbrSpecularGlossiness.specularGlossinessTexture;
                    pending.push(parser.assignTexture(materialParams, 'glossinessMap', specGlossMapDef));
                    pending.push(parser.assignTexture(materialParams, '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++) {

var value = source[params[i]];
                    target[params[i]] = (value && value.isColor) ? value.clone() : value;

}

return target;

// Here's based on refreshUniformsCommon() and refreshUniformsStandard() in WebGLRenderer.
            refreshUniforms: function(renderer, scene, camera, geometry, material) {

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;

}

};

}

/**
     * Mesh Quantization Extension
     *
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_mesh_quantization
     */
    function GLTFMeshQuantizationExtension() {

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
    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 */

var 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_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_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 ALPHA_MODES = {
        OPAQUE: 'OPAQUE',
        MASK: 'MASK',
        BLEND: 'BLEND'
    };

var MIME_TYPE_FORMATS = {
        'image/png': THREE.RGBAFormat,
        'image/jpeg': THREE.RGBFormat
    };

/* 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 THREE.MeshStandardMaterial({
                color: 0xFFFFFF,
                emissive: 0x000000,
                metalness: 1,
                roughness: 1,
                transparent: false,
                depthTest: true,
                side: THREE.FrontSide
            });

}

return cache['DefaultMaterial'];

}

function addUnknownExtensionsToUserData(knownExtensions, object, objectDef) {

// Add unknown glTF extensions to an object's userData.

for (var name in objectDef.extensions) {

if (knownExtensions[name] === undefined) {

object.userData.gltfExtensions = object.userData.gltfExtensions || {};
                object.userData.gltfExtensions[name] = objectDef.extensions[name];

}

/**
     * @param {THREE.Object3D|THREE.Material|THREE.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 {THREE.BufferGeometry} geometry
     * @param {Array<GLTF.Target>} targets
     * @param {GLTFParser} parser
     * @return {Promise<THREE.BufferGeometry>}
     */
    function addMorphTargets(geometry, targets, parser) {

var hasMorphPosition = false;
        var hasMorphNormal = false;

for (var i = 0, il = targets.length; i < il; i++) {

var 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);

var pendingPositionAccessors = [];
        var pendingNormalAccessors = [];

for (var i = 0, il = targets.length; i < il; i++) {

var target = targets[i];

if (hasMorphPosition) {

var pendingAccessor = target.POSITION !== undefined ? parser.getDependency('accessor', target.POSITION) : geometry.attributes.position;

pendingPositionAccessors.push(pendingAccessor);

}

if (hasMorphNormal) {

var 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) {

var morphPositions = accessors[0];
            var morphNormals = accessors[1];

if (hasMorphPosition) geometry.morphAttributes.position = morphPositions;
            if (hasMorphNormal) geometry.morphAttributes.normal = morphNormals;
            geometry.morphTargetsRelative = true;

return geometry;

});

}

/**
     * @param {THREE.Mesh} mesh
     * @param {GLTF.Mesh} meshDef
     */
    function updateMorphTargets(mesh, meshDef) {

mesh.updateMorphTargets();

if (meshDef.weights !== undefined) {

for (var 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)) {

var targetNames = meshDef.extras.targetNames;

if (mesh.morphTargetInfluences.length === targetNames.length) {

mesh.morphTargetDictionary = {};

for (var 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) {

var dracoExtension = primitiveDef.extensions && primitiveDef.extensions[EXTENSIONS.KHR_DRACO_MESH_COMPRESSION];
        var 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) {

var attributesKey = '';

var keys = Object.keys(attributes).sort();

for (var i = 0, il = keys.length; i < il; i++) {

attributesKey += keys[i] + ':' + attributes[keys[i]] + ';';

}

return attributesKey;

}

/* GLTF PARSER */

function GLTFParser(json, extensions, options) {

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

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

// BufferGeometry caching
        this.primitiveCache = {};

this.textureLoader = new THREE.TextureLoader(this.options.manager);
        this.textureLoader.setCrossOrigin(this.options.crossOrigin);

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

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

this.fileLoader.setWithCredentials(true);

}

GLTFParser.prototype.parse = function(onLoad, onError) {

var parser = this;
        var json = this.json;
        var extensions = this.extensions;

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

// Mark the special nodes/meshes in json for efficient parse
        this.markDefs();

Promise.all([

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

]).then(function(dependencies) {

var 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);

onLoad(result);

}).catch(onError);

};

/**
     * Marks the special nodes/meshes in json for efficient parse.
     */
    GLTFParser.prototype.markDefs = function() {

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

var meshReferences = {};
        var meshUses = {};

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

var joints = skinDefs[skinIndex].joints;

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

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

}

// Meshes can (and should) be reused by multiple nodes in a glTF asset. To
        // avoid having more than one THREE.Mesh with the same name, count
        // references and rename instances below.
        //
        // Example: CesiumMilkTruck sample model reuses "Wheel" meshes.
        for (var nodeIndex = 0, nodeLength = nodeDefs.length; nodeIndex < nodeLength; nodeIndex++) {

var nodeDef = nodeDefs[nodeIndex];

if (nodeDef.mesh !== undefined) {

if (meshReferences[nodeDef.mesh] === undefined) {

meshReferences[nodeDef.mesh] = meshUses[nodeDef.mesh] = 0;

}

meshReferences[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;

}

this.json.meshReferences = meshReferences;
        this.json.meshUses = meshUses;

};

/**
     * Requests the specified dependency asynchronously, with caching.
     * @param {string} type
     * @param {number} index
     * @return {Promise<THREE.Object3D|THREE.Material|THREE.Texture|THREE.AnimationClip|ArrayBuffer|Object>}
     */
    GLTFParser.prototype.getDependency = function(type, index) {

var cacheKey = type + ':' + index;
        var 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.loadMesh(index);
                    break;

case 'accessor':
                    dependency = this.loadAccessor(index);
                    break;

case 'bufferView':
                    dependency = this.loadBufferView(index);
                    break;

case 'buffer':
                    dependency = this.loadBuffer(index);
                    break;

case 'material':
                    dependency = this.loadMaterial(index);
                    break;

case 'texture':
                    dependency = this.loadTexture(index);
                    break;

case 'skin':
                    dependency = this.loadSkin(index);
                    break;

case 'animation':
                    dependency = this.loadAnimation(index);
                    break;

case 'camera':
                    dependency = this.loadCamera(index);
                    break;

case 'light':
                    dependency = this.extensions[EXTENSIONS.KHR_LIGHTS_PUNCTUAL].loadLight(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>>}
     */
    GLTFParser.prototype.getDependencies = function(type) {

var dependencies = this.cache.get(type);

if (!dependencies) {

var parser = this;
            var 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>}
     */
    GLTFParser.prototype.loadBuffer = function(bufferIndex) {

var bufferDef = this.json.buffers[bufferIndex];
        var 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);

}

var 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>}
     */
    GLTFParser.prototype.loadBufferView = function(bufferViewIndex) {

var bufferViewDef = this.json.bufferViews[bufferViewIndex];

return this.getDependency('buffer', bufferViewDef.buffer).then(function(buffer) {

var byteLength = bufferViewDef.byteLength || 0;
            var 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<THREE.BufferAttribute|THREE.InterleavedBufferAttribute>}
     */
    GLTFParser.prototype.loadAccessor = function(accessorIndex) {

var parser = this;
        var json = this.json;

var 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);

}

var 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) {

var bufferView = bufferViews[0];

var itemSize = WEBGL_TYPE_SIZES[accessorDef.type];
            var TypedArray = WEBGL_COMPONENT_TYPES[accessorDef.componentType];

// For VEC3: itemSize is 3, elementBytes is 4, itemBytes is 12.
            var elementBytes = TypedArray.BYTES_PER_ELEMENT;
            var itemBytes = elementBytes * itemSize;
            var byteOffset = accessorDef.byteOffset || 0;
            var byteStride = accessorDef.bufferView !== undefined ? json.bufferViews[accessorDef.bufferView].byteStride : undefined;
            var normalized = accessorDef.normalized === true;
            var 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
                var ibSlice = Math.floor(byteOffset / byteStride);
                var ibCacheKey = 'InterleavedBuffer:' + accessorDef.bufferView + ':' + accessorDef.componentType + ':' + ibSlice + ':' + accessorDef.count;
                var 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 THREE.InterleavedBuffer(array, byteStride / elementBytes);

parser.cache.add(ibCacheKey, ib);

}

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

}

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

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

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

var sparseIndices = new TypedArrayIndices(bufferViews[1], byteOffsetIndices, accessorDef.sparse.count * itemSizeIndices);
                var 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 THREE.BufferAttribute(bufferAttribute.array.slice(), bufferAttribute.itemSize, bufferAttribute.normalized);

}

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

var 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>}
     */
    GLTFParser.prototype.loadTexture = function(textureIndex) {

var parser = this;
        var json = this.json;
        var options = this.options;
        var textureLoader = this.textureLoader;

var URL = window.URL || window.webkitURL;

var textureDef = json.textures[textureIndex];

var textureExtensions = textureDef.extensions || {};

var source;

if (textureExtensions[EXTENSIONS.MSFT_TEXTURE_DDS]) {

source = json.images[textureExtensions[EXTENSIONS.MSFT_TEXTURE_DDS].source];

} else {

source = json.images[textureDef.source];

}

var sourceURI = source.uri;
        var isObjectURL = false;

if (source.bufferView !== undefined) {

// Load binary image data from bufferView, if provided.

sourceURI = parser.getDependency('bufferView', source.bufferView).then(function(bufferView) {

isObjectURL = true;
                var blob = new Blob([bufferView], {
                    type: source.mimeType
                });
                sourceURI = URL.createObjectURL(blob);
                return sourceURI;

});

}

return Promise.resolve(sourceURI).then(function(sourceURI) {

// Load Texture resource.

var loader = options.manager.getHandler(sourceURI);

if (!loader) {

loader = textureExtensions[EXTENSIONS.MSFT_TEXTURE_DDS] ? parser.extensions[EXTENSIONS.MSFT_TEXTURE_DDS].ddsLoader : textureLoader;

}

return new Promise(function(resolve, reject) {

loader.load(resolveURL(sourceURI, options.path), resolve, undefined, reject);

});

}).then(function(texture) {

// Clean up resources and configure Texture.

if (isObjectURL === true) {

URL.revokeObjectURL(sourceURI);

}

texture.flipY = false;

if (textureDef.name !== undefined) texture.name = textureDef.name;

// Ignore unknown mime types, like DDS files.
            if (source.mimeType in MIME_TYPE_FORMATS) {

texture.format = MIME_TYPE_FORMATS[source.mimeType];

}

var samplers = json.samplers || {};
            var sampler = samplers[textureDef.sampler] || {};

texture.magFilter = WEBGL_FILTERS[sampler.magFilter] || THREE.LinearFilter;
            texture.minFilter = WEBGL_FILTERS[sampler.minFilter] || THREE.LinearMipmapLinearFilter;
            texture.wrapS = WEBGL_WRAPPINGS[sampler.wrapS] || THREE.RepeatWrapping;
            texture.wrapT = WEBGL_WRAPPINGS[sampler.wrapT] || THREE.RepeatWrapping;

return texture;

});

};

/**
     * Asynchronously assigns a texture to the given material parameters.
     * @param {Object} materialParams
     * @param {string} mapName
     * @param {Object} mapDef
     * @return {Promise}
     */
    GLTFParser.prototype.assignTexture = function(materialParams, mapName, mapDef) {

var parser = this;

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

if (!texture.isCompressedTexture) {

switch (mapName) {

case 'aoMap':
                    case 'emissiveMap':
                    case 'metalnessMap':
                    case 'normalMap':
                    case 'roughnessMap':
                        texture.format = THREE.RGBFormat;
                        break;

}

// 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]) {

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

if (transform) {

texture = parser.extensions[EXTENSIONS.KHR_TEXTURE_TRANSFORM].extendTexture(texture, transform);

}

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 accomodate different primitive types, defines, etc. New materials will
     * be created if necessary, and reused from a cache.
     * @param  {THREE.Object3D} mesh Mesh, Line, or Points instance.
     */
    GLTFParser.prototype.assignFinalMaterial = function(mesh) {

var geometry = mesh.geometry;
        var material = mesh.material;
        var extensions = this.extensions;

var useVertexTangents = geometry.attributes.tangent !== undefined;
        var useVertexColors = geometry.attributes.color !== undefined;
        var useFlatShading = geometry.attributes.normal === undefined;
        var useSkinning = mesh.isSkinnedMesh === true;
        var useMorphTargets = Object.keys(geometry.morphAttributes).length > 0;
        var useMorphNormals = useMorphTargets && geometry.morphAttributes.normal !== undefined;

if (mesh.isPoints) {

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

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

if (!pointsMaterial) {

pointsMaterial = new THREE.PointsMaterial();
                THREE.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) {

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

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

if (!lineMaterial) {

lineMaterial = new THREE.LineBasicMaterial();
                THREE.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 || useSkinning || useMorphTargets) {

var cacheKey = 'ClonedMaterial:' + material.uuid + ':';

if (material.isGLTFSpecularGlossinessMaterial) cacheKey += 'specular-glossiness:';
            if (useSkinning) cacheKey += 'skinning:';
            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:';

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

if (!cachedMaterial) {

cachedMaterial = material.isGLTFSpecularGlossinessMaterial ? extensions[EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS].cloneMaterial(material) : material.clone();

if (useSkinning) cachedMaterial.skinning = true;
                if (useVertexTangents) cachedMaterial.vertexTangents = true;
                if (useVertexColors) cachedMaterial.vertexColors = THREE.VertexColors;
                if (useFlatShading) cachedMaterial.flatShading = true;
                if (useMorphTargets) cachedMaterial.morphTargets = true;
                if (useMorphNormals) cachedMaterial.morphNormals = true;

this.cache.add(cacheKey, cachedMaterial);

}

material = cachedMaterial;

}

// workarounds for mesh and geometry

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

geometry.setAttribute('uv2', new THREE.BufferAttribute(geometry.attributes.uv.array, 2));

}

if (material.isGLTFSpecularGlossinessMaterial) {

// for GLTFSpecularGlossinessMaterial(ShaderMaterial) uniforms runtime update
            mesh.onBeforeRender = extensions[EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS].refreshUniforms;

}

// https://github.com/mrdoob/three.js/issues/11438#issuecomment-507003995
        if (material.normalScale && !useVertexTangents) {

material.normalScale.y = -material.normalScale.y;

}

mesh.material = material;

};

/**
     * Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#materials
     * @param {number} materialIndex
     * @return {Promise<THREE.Material>}
     */
    GLTFParser.prototype.loadMaterial = function(materialIndex) {

var parser = this;
        var json = this.json;
        var extensions = this.extensions;
        var materialDef = json.materials[materialIndex];

var materialType;
        var materialParams = {};
        var materialExtensions = materialDef.extensions || {};

var pending = [];

if (materialExtensions[EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS]) {

var 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]) {

var 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

materialType = THREE.MeshStandardMaterial;

var metallicRoughness = materialDef.pbrMetallicRoughness || {};

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

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));

}

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));

}

if (materialDef.doubleSided === true) {

materialParams.side = THREE.DoubleSide;

}

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

if (alphaMode === ALPHA_MODES.BLEND) {

materialParams.transparent = true;

} else {

materialParams.transparent = false;

if (alphaMode === ALPHA_MODES.MASK) {

materialParams.alphaTest = materialDef.alphaCutoff !== undefined ? materialDef.alphaCutoff : 0.5;

}

if (materialDef.normalTexture !== undefined && materialType !== THREE.MeshBasicMaterial) {

pending.push(parser.assignTexture(materialParams, 'normalMap', materialDef.normalTexture));

materialParams.normalScale = new THREE.Vector2(1, 1);

if (materialDef.normalTexture.scale !== undefined) {

materialParams.normalScale.set(materialDef.normalTexture.scale, materialDef.normalTexture.scale);

}

if (materialDef.occlusionTexture !== undefined && materialType !== THREE.MeshBasicMaterial) {

pending.push(parser.assignTexture(materialParams, 'aoMap', materialDef.occlusionTexture));

if (materialDef.occlusionTexture.strength !== undefined) {

materialParams.aoMapIntensity = materialDef.occlusionTexture.strength;

}

if (materialDef.emissiveFactor !== undefined && materialType !== THREE.MeshBasicMaterial) {

materialParams.emissive = new THREE.Color().fromArray(materialDef.emissiveFactor);

}

if (materialDef.emissiveTexture !== undefined && materialType !== THREE.MeshBasicMaterial) {

pending.push(parser.assignTexture(materialParams, 'emissiveMap', materialDef.emissiveTexture));

}

return Promise.all(pending).then(function() {

var material;

if (materialType === THREE.ShaderMaterial) {

material = extensions[EXTENSIONS.KHR_MATERIALS_PBR_SPECULAR_GLOSSINESS].createMaterial(materialParams);

} else {

material = new materialType(materialParams);

}

if (materialDef.name !== undefined) material.name = materialDef.name;

// baseColorTexture, emissiveTexture, and specularGlossinessTexture use sRGB encoding.
            if (material.map) material.map.encoding = THREE.sRGBEncoding;
            if (material.emissiveMap) material.emissiveMap.encoding = THREE.sRGBEncoding;
            if (material.specularMap) material.specularMap.encoding = THREE.sRGBEncoding;

assignExtrasToUserData(material, materialDef);

if (materialDef.extensions) addUnknownExtensionsToUserData(extensions, material, materialDef);

return material;

});

};

/**
     * @param {THREE.BufferGeometry} geometry
     * @param {GLTF.Primitive} primitiveDef
     * @param {GLTFParser} parser
     */
    function computeBounds(geometry, primitiveDef, parser) {

var attributes = primitiveDef.attributes;

var box = new THREE.Box3();

if (attributes.POSITION !== undefined) {

var accessor = parser.json.accessors[attributes.POSITION];

var min = accessor.min;
            var 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 THREE.Vector3(min[0], min[1], min[2]),
                    new THREE.Vector3(max[0], max[1], max[2]));

} else {

console.warn('THREE.GLTFLoader: Missing min/max properties for accessor POSITION.');

return;

}

} else {

return;

}

var targets = primitiveDef.targets;

if (targets !== undefined) {

var vector = new THREE.Vector3();

for (var i = 0, il = targets.length; i < il; i++) {

var target = targets[i];

if (target.POSITION !== undefined) {

var accessor = parser.json.accessors[target.POSITION];
                    var min = accessor.min;
                    var 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])));

box.expandByVector(vector);

} else {

console.warn('THREE.GLTFLoader: Missing min/max properties for accessor POSITION.');

}

geometry.boundingBox = box;

var sphere = new THREE.Sphere();

box.getCenter(sphere.center);
        sphere.radius = box.min.distanceTo(box.max) / 2;

geometry.boundingSphere = sphere;

}

/**
     * @param {THREE.BufferGeometry} geometry
     * @param {GLTF.Primitive} primitiveDef
     * @param {GLTFParser} parser
     * @return {Promise<THREE.BufferGeometry>}
     */
    function addPrimitiveAttributes(geometry, primitiveDef, parser) {

var attributes = primitiveDef.attributes;

var pending = [];

function assignAttributeAccessor(accessorIndex, attributeName) {

return parser.getDependency('accessor', accessorIndex)
                .then(function(accessor) {

geometry.setAttribute(attributeName, accessor);

});

}

for (var gltfAttributeName in attributes) {

var 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) {

var 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 {THREE.BufferGeometry} geometry
     * @param {Number} drawMode
     * @return {THREE.BufferGeometry}
     */
    function toTrianglesDrawMode(geometry, drawMode) {

var index = geometry.getIndex();

// generate index if not present

if (index === null) {

var indices = [];

var position = geometry.getAttribute('position');

if (position !== undefined) {

for (var 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;

}

var numberOfTriangles = index.count - 2;
        var newIndices = [];

if (drawMode === THREE.TriangleFanDrawMode) {

// gl.TRIANGLE_FAN

for (var 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 (var 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

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

return newGeometry;

}

/**
     * 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<THREE.BufferGeometry>>}
     */
    GLTFParser.prototype.loadGeometries = function(primitives) {

var parser = this;
        var extensions = this.extensions;
        var cache = this.primitiveCache;

function createDracoPrimitive(primitive) {

return extensions[EXTENSIONS.KHR_DRACO_MESH_COMPRESSION]
                .decodePrimitive(primitive, parser)
                .then(function(geometry) {

return addPrimitiveAttributes(geometry, primitive, parser);

});

}

var pending = [];

for (var i = 0, il = primitives.length; i < il; i++) {

var primitive = primitives[i];
            var cacheKey = createPrimitiveKey(primitive);

// See if we've already created this geometry
            var cached = cache[cacheKey];

if (cached) {

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

} else {

var 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 THREE.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<THREE.Group|THREE.Mesh|THREE.SkinnedMesh>}
     */
    GLTFParser.prototype.loadMesh = function(meshIndex) {

var parser = this;
        var json = this.json;

var meshDef = json.meshes[meshIndex];
        var primitives = meshDef.primitives;

var pending = [];

for (var i = 0, il = primitives.length; i < il; i++) {

var 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) {

var materials = results.slice(0, results.length - 1);
            var geometries = results[results.length - 1];

var meshes = [];

for (var i = 0, il = geometries.length; i < il; i++) {

var geometry = geometries[i];
                var primitive = primitives[i];

// 1. create Mesh

var mesh;

var 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 THREE.SkinnedMesh(geometry, material) : new THREE.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, THREE.TriangleStripDrawMode);

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

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

}

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

mesh = new THREE.LineSegments(geometry, material);

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

mesh = new THREE.Line(geometry, material);

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

mesh = new THREE.LineLoop(geometry, material);

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

mesh = new THREE.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 = meshDef.name || ('mesh_' + meshIndex);

if (geometries.length > 1) mesh.name += '_' + i;

assignExtrasToUserData(mesh, meshDef);

parser.assignFinalMaterial(mesh);

meshes.push(mesh);

}

if (meshes.length === 1) {

return meshes[0];

}

var group = new THREE.Group();

for (var 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>}
     */
    GLTFParser.prototype.loadCamera = function(cameraIndex) {

var camera;
        var cameraDef = this.json.cameras[cameraIndex];
        var params = cameraDef[cameraDef.type];

if (!params) {

console.warn('THREE.GLTFLoader: Missing camera parameters.');
            return;

}

if (cameraDef.type === 'perspective') {

camera = new THREE.PerspectiveCamera(THREE.Math.radToDeg(params.yfov), params.aspectRatio || 1, params.znear || 1, params.zfar || 2e6);

} else if (cameraDef.type === 'orthographic') {

camera = new THREE.OrthographicCamera(params.xmag / -2, params.xmag / 2, params.ymag / 2, params.ymag / -2, params.znear, params.zfar);

}

if (cameraDef.name !== undefined) camera.name = 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>}
     */
    GLTFParser.prototype.loadSkin = function(skinIndex) {

var skinDef = this.json.skins[skinIndex];

var 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<THREE.AnimationClip>}
     */
    GLTFParser.prototype.loadAnimation = function(animationIndex) {

var json = this.json;

var animationDef = json.animations[animationIndex];

var pendingNodes = [];
        var pendingInputAccessors = [];
        var pendingOutputAccessors = [];
        var pendingSamplers = [];
        var pendingTargets = [];

for (var i = 0, il = animationDef.channels.length; i < il; i++) {

var channel = animationDef.channels[i];
            var sampler = animationDef.samplers[channel.sampler];
            var target = channel.target;
            var name = target.node !== undefined ? target.node : target.id; // NOTE: target.id is deprecated.
            var input = animationDef.parameters !== undefined ? animationDef.parameters[sampler.input] : sampler.input;
            var 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) {

var nodes = dependencies[0];
            var inputAccessors = dependencies[1];
            var outputAccessors = dependencies[2];
            var samplers = dependencies[3];
            var targets = dependencies[4];

var tracks = [];

for (var i = 0, il = nodes.length; i < il; i++) {

var node = nodes[i];
                var inputAccessor = inputAccessors[i];
                var outputAccessor = outputAccessors[i];
                var sampler = samplers[i];
                var target = targets[i];

if (node === undefined) continue;

node.updateMatrix();
                node.matrixAutoUpdate = true;

var TypedKeyframeTrack;

switch (PATH_PROPERTIES[target.path]) {

case PATH_PROPERTIES.weights:

TypedKeyframeTrack = THREE.NumberKeyframeTrack;
                        break;

case PATH_PROPERTIES.rotation:

TypedKeyframeTrack = THREE.QuaternionKeyframeTrack;
                        break;

case PATH_PROPERTIES.position:
                    case PATH_PROPERTIES.scale:
                    default:

TypedKeyframeTrack = THREE.VectorKeyframeTrack;
                        break;

}

var targetName = node.name ? node.name : node.uuid;

var interpolation = sampler.interpolation !== undefined ? INTERPOLATION[sampler.interpolation] : THREE.InterpolateLinear;

var targetNames = [];

if (PATH_PROPERTIES[target.path] === PATH_PROPERTIES.weights) {

// Node may be a THREE.Group (glTF mesh with several primitives) or a THREE.Mesh.
                    node.traverse(function(object) {

if (object.isMesh === true && object.morphTargetInfluences) {

targetNames.push(object.name ? object.name : object.uuid);

}

});

} else {

targetNames.push(targetName);

}

var outputArray = outputAccessor.array;

if (outputAccessor.normalized) {

var scale;

if (outputArray.constructor === Int8Array) {

scale = 1 / 127;

} else if (outputArray.constructor === Uint8Array) {

scale = 1 / 255;

} else if (outputArray.constructor == Int16Array) {

scale = 1 / 32767;

} else if (outputArray.constructor === Uint16Array) {

scale = 1 / 65535;

} else {

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

}

var scaled = new Float32Array(outputArray.length);

for (var j = 0, jl = outputArray.length; j < jl; j++) {

scaled[j] = outputArray[j] * scale;

}

outputArray = scaled;

}

for (var j = 0, jl = targetNames.length; j < jl; j++) {

var 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);

}

var name = animationDef.name !== undefined ? animationDef.name : 'animation_' + animationIndex;

return new THREE.AnimationClip(name, undefined, tracks);

});

};

/**
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#nodes-and-hierarchy
     * @param {number} nodeIndex
     * @return {Promise<THREE.Object3D>}
     */
    GLTFParser.prototype.loadNode = function(nodeIndex) {

var json = this.json;
        var extensions = this.extensions;
        var parser = this;

var meshReferences = json.meshReferences;
        var meshUses = json.meshUses;

var nodeDef = json.nodes[nodeIndex];

return (function() {

var pending = [];

if (nodeDef.mesh !== undefined) {

pending.push(parser.getDependency('mesh', nodeDef.mesh).then(function(mesh) {

var node;

if (meshReferences[nodeDef.mesh] > 1) {

var instanceNum = meshUses[nodeDef.mesh] ++;

node = mesh.clone();
                        node.name += '_instance_' + instanceNum;

// onBeforeRender copy for Specular-Glossiness
                        node.onBeforeRender = mesh.onBeforeRender;

for (var i = 0, il = node.children.length; i < il; i++) {

node.children[i].name += '_instance_' + instanceNum;
                            node.children[i].onBeforeRender = mesh.children[i].onBeforeRender;

}

} else {

node = 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 (var i = 0, il = nodeDef.weights.length; i < il; i++) {

o.morphTargetInfluences[i] = nodeDef.weights[i];

}

});

}

return node;

}));

}

if (nodeDef.camera !== undefined) {

pending.push(parser.getDependency('camera', nodeDef.camera));

}

if (nodeDef.extensions && nodeDef.extensions[EXTENSIONS.KHR_LIGHTS_PUNCTUAL] && nodeDef.extensions[EXTENSIONS.KHR_LIGHTS_PUNCTUAL].light !== undefined) {

pending.push(parser.getDependency('light', nodeDef.extensions[EXTENSIONS.KHR_LIGHTS_PUNCTUAL].light));

}

return Promise.all(pending);

}()).then(function(objects) {

var node;

// .isBone isn't in glTF spec. See .markDefs
            if (nodeDef.isBone === true) {

node = new THREE.Bone();

} else if (objects.length > 1) {

node = new THREE.Group();

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

node = objects[0];

} else {

node = new THREE.Object3D();

}

if (node !== objects[0]) {

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

node.add(objects[i]);

}

if (nodeDef.name !== undefined) {

node.userData.name = nodeDef.name;
                node.name = THREE.PropertyBinding.sanitizeNodeName(nodeDef.name);

}

assignExtrasToUserData(node, nodeDef);

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

if (nodeDef.matrix !== undefined) {

var matrix = new THREE.Matrix4();
                matrix.fromArray(nodeDef.matrix);
                node.applyMatrix(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);

}

return node;

});

};

/**
     * Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#scenes
     * @param {number} sceneIndex
     * @return {Promise<THREE.Scene>}
     */
    GLTFParser.prototype.loadScene = function() {

// scene node hierachy builder

function buildNodeHierachy(nodeId, parentObject, json, parser) {

var nodeDef = json.nodes[nodeId];

return parser.getDependency('node', nodeId).then(function(node) {

if (nodeDef.skin === undefined) return node;

// build skeleton here as well

var skinEntry;

return parser.getDependency('skin', nodeDef.skin).then(function(skin) {

skinEntry = skin;

var pendingJoints = [];

for (var 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;

var bones = [];
                        var boneInverses = [];

for (var j = 0, jl = jointNodes.length; j < jl; j++) {

var jointNode = jointNodes[j];

if (jointNode) {

bones.push(jointNode);

var mat = new THREE.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 THREE.Skeleton(bones, boneInverses), mesh.matrixWorld);

});

return node;

});

}).then(function(node) {

// build node hierachy

parentObject.add(node);

var pending = [];

if (nodeDef.children) {

var children = nodeDef.children;

for (var i = 0, il = children.length; i < il; i++) {

var child = children[i];
                        pending.push(buildNodeHierachy(child, node, json, parser));

}

return Promise.all(pending);

});

}

return function loadScene(sceneIndex) {

var json = this.json;
            var extensions = this.extensions;
            var sceneDef = this.json.scenes[sceneIndex];
            var parser = this;

var scene = new THREE.Scene();
            if (sceneDef.name !== undefined) scene.name = sceneDef.name;

assignExtrasToUserData(scene, sceneDef);

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

var nodeIds = sceneDef.nodes || [];

var pending = [];

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

pending.push(buildNodeHierachy(nodeIds[i], scene, json, parser));

}

return Promise.all(pending).then(function() {

return scene;

});

};

}();

return GLTFLoader;

})();

//Variables for setup
var bd = document.body;
var suns = document.querySelector("#card")

let container;
let camera;
let renderer;
let scene;
let house;

function init() {
    container = document.querySelector(".scene");

//Create scene
    scene = new THREE.Scene();
    const fov = 50;
    const aspect = container.clientWidth / container.clientHeight;
    const near = 1;
    const far = 2000;

//Camera setup
    camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
    camera.position.set(0, 40, 350);

const ambient = new THREE.AmbientLight(0xfcfcfc, 1.1);
    scene.add(ambient);

const light = new THREE.DirectionalLight(0x000000, 1);
    light.position.set(50, 50, 10);
    scene.add(light);

const plight = new THREE.PointLight(0x6ce0ff, 2, 100);
    plight.position.set(50, 50, 50);
    scene.add(plight);

//Renderer
    renderer = new THREE.WebGLRenderer({
        antialias: true,
        alpha: true
    });
    renderer.setSize(container.clientWidth, container.clientHeight);
    renderer.setPixelRatio(window.devicePixelRatio);
    container.appendChild(renderer.domElement);

//Load Model
    let loader = new THREE.GLTFLoader();
    loader.load("/uploads/2001/drone.gltf", function(gltf) {
        scene.add(gltf.scene);
        house = gltf.scene.children[0];
        animate();
    });
}

function animate() {
    requestAnimationFrame(animate);
    house.rotation.z += 0.007;
    renderer.render(scene, camera);
}
init();

function onWindowResize() {
    // camera.aspect = container.clientWidth / container.clientHeight;
    // camera.updateProjectionMatrix();
    //
    // renderer.setSize(container.clientWidth, container.clientHeight);
}
window.addEventListener("resize", onWindowResize);

编译

CSS

*,
*::after,
*::before {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
/************/

html,
body {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    min-width: 650px;
    min-height: 500px;
    font-size: 11px;
    font-family: 'Montserrat', sans-serif;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    color: #232323;
    user-select: none;
}
ul {
    list-style: none;
}
svg {
    fill: #ffd055
}
/************/

.card {
    display: flex;
    position: relative;
    width: 650px;
    height: 400px;
    transform-style: preserve-3d;
    transition: .5s ease;
}
/**/

.card__img {
    position: relative;
    width: 325px;
    height: 100%;
    background-image: linear-gradient(-120deg, #91D277, #008CB3);
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);
}
.scene {
    position: absolute;
    top: 35px;
    left: -25px;
    width: 350px;
    min-height: 325px;
    z-index: 10;
}
.title,
.subtitle {
    position: absolute;
    color: #ffffff;
    font-size: 72px;
    opacity: .075;
    letter-spacing: 4px;
    font-weight: bolder;
}
.title {
    transform: rotateZ(-90deg) translateX(-73%) translateY(30%);
    transform-origin: bottom left;
}
.subtitle {
    bottom: 0;
    right: 10px;
}
/**/

.card__description {
    position: absolute;
    top: 0;
    right: 0;
    width: 325px;
    height: 100%;
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);
}
.card__container {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    top: -25px;
    width: 100%;
    height: 450px;
    padding: 30px;
    background-color: #ffffff;
}
.card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.card__rating {
    display: flex;
}
.card__price {
    width: 100%;
    font-size: 32px;
    text-align: right;
}
.card__title,
.card__subtitle {
    font-size: 24px;
    font-weight: 400;
    line-height: 1.6;
}
.card__subtitle {
    font-size: 16px;
}
.card__button {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 40px;
    width: 100%;
    font-size: 12px;
    font-weight: bolder;
    letter-spacing: 1px;
    border-radius: 35px;
    color: #ffffff;
    background-color: #36D1E7;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    cursor: pointer;
}
.card__button,
.card__info,
.colors {
    transform: translateZ(35px);
}
/**/

.colors {
    display: flex;
    flex-direction: column;
    width: 100%;
}
.color__title {
    line-height: 2;
    font-size: 12px;
    color: #868686;
    letter-spacing: 1px;
}
.color__container {
    display: flex;
}
.color__item {
    height: 25px;
    width: 25px;
    margin-right: 10px;
    border-radius: 50%;
    background-color: #fff;
}
.color__item:nth-of-type(1) {
    border: 4px solid #36D1E7;
}
.color__item:nth-of-type(2) {
    background-color: #394282;
}
.color__item:nth-of-type(3) {
    border: 4px solid #6BDA94;
}
.color__item:nth-of-type(4) {
    border: 4px solid #FBCB61;
}
.color__item:nth-of-type(5) {
    border: 4px solid #6A73CF;
}

HTML

<div class="card__container">
            
            <div class="card__info">
                <div class="card__header">
                    <div class="card__rating">
                        <svg height="25" width="23" class="star rating" data-rating="1">
                            <polygon points="9.9, 1.1, 3.3, 21.78, 19.8, 8.58, 0, 8.58, 16.5, 21.78" />
                        </svg>
                        <svg height="25" width="23" class="star rating" data-rating="1">
                            <polygon points="9.9, 1.1, 3.3, 21.78, 19.8, 8.58, 0, 8.58, 16.5, 21.78" />
                        </svg>
                        <svg height="25" width="23" class="star rating" data-rating="1">
                            <polygon points="9.9, 1.1, 3.3, 21.78, 19.8, 8.58, 0, 8.58, 16.5, 21.78" />
                        </svg>
                        <svg height="25" width="23" class="star rating" data-rating="1">
                            <polygon points="9.9, 1.1, 3.3, 21.78, 19.8, 8.58, 0, 8.58, 16.5, 21.78" />
                        </svg>
                        <svg height="25" width="23" class="star rating" data-rating="1">
                            <polygon points="9.9, 1.1, 3.3, 21.78, 19.8, 8.58, 0, 8.58, 16.5, 21.78" />
                        </svg>
                    </div>
                    <p class="card__price">2020RMB</p>
                </div>
                <h1 class="card__title">无人机</h1>
                <h2 class="card__subtitle">2020春节特款</h2>
            </div>
            
            <div class="colors">
                <span class="color__title">COLOR</span>
                <div class="color__container">
                    <div class="color__item"></div>
                    <div class="color__item"></div>
                    <div class="color__item"></div>
                    <div class="color__item"></div>
                    <div class="color__item"></div>
                </div>
            </div>
            
            <a class="card__button">ADD TO CART</a>
        </div>
    </div>
</div>

unmanned drone, aerocraft ecommerce demo page

three, drone

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unmanned drone, aerocraft ecommerce demo page

three, drone

WebGL Three.js无人机（飞行器）极速穿越动画和光影特效

如何使用three.js Phenomenon插件来创建基于webgl的页面滚动平滑过渡特效

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