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GLTF.js
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GLTF.js
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/**
* glTF Loader
* Specification https://github.com/KhronosGroup/glTF/blob/master/specification/README.md
*
* TODO Morph targets
*/
import Base from '../core/Base';
import util from '../core/util';
import vendor from '../core/vendor';
import Scene from '../Scene';
import Material from '../Material';
import StandardMaterial from '../StandardMaterial';
import Mesh from '../Mesh';
import Node from '../Node';
import Texture from '../Texture';
import Texture2D from '../Texture2D';
import shaderLibrary from '../shader/library';
import Skeleton from '../Skeleton';
import Joint from '../Joint';
import PerspectiveCamera from '../camera/Perspective';
import OrthographicCamera from '../camera/Orthographic';
import glenum from '../core/glenum';
import BoundingBox from '../math/BoundingBox';
import TrackClip from '../animation/TrackClip';
import SamplerTrack from '../animation/SamplerTrack';
import Geometry from '../Geometry';
// Import builtin shader
import '../shader/builtin';
import Shader from '../Shader';
var semanticAttributeMap = {
'NORMAL': 'normal',
'POSITION': 'position',
'TEXCOORD_0': 'texcoord0',
'TEXCOORD_1': 'texcoord1',
'WEIGHTS_0': 'weight',
'JOINTS_0': 'joint',
'COLOR_0': 'color'
};
var ARRAY_CTOR_MAP = {
5120: vendor.Int8Array,
5121: vendor.Uint8Array,
5122: vendor.Int16Array,
5123: vendor.Uint16Array,
5125: vendor.Uint32Array,
5126: vendor.Float32Array
};
var SIZE_MAP = {
SCALAR: 1,
VEC2: 2,
VEC3: 3,
VEC4: 4,
MAT2: 4,
MAT3: 9,
MAT4: 16
};
function getAccessorData(json, lib, accessorIdx, isIndices) {
var accessorInfo = json.accessors[accessorIdx];
var buffer = lib.bufferViews[accessorInfo.bufferView];
var byteOffset = accessorInfo.byteOffset || 0;
var ArrayCtor = ARRAY_CTOR_MAP[accessorInfo.componentType] || vendor.Float32Array;
var size = SIZE_MAP[accessorInfo.type];
if (size == null && isIndices) {
size = 1;
}
var arr = new ArrayCtor(buffer, byteOffset, size * accessorInfo.count);
var quantizeExtension = accessorInfo.extensions && accessorInfo.extensions['WEB3D_quantized_attributes'];
if (quantizeExtension) {
var decodedArr = new vendor.Float32Array(size * accessorInfo.count);
var decodeMatrix = quantizeExtension.decodeMatrix;
var decodeOffset;
var decodeScale;
var decodeOffset = new Array(size);
var decodeScale = new Array(size);
for (var k = 0; k < size; k++) {
decodeOffset[k] = decodeMatrix[size * (size + 1) + k];
decodeScale[k] = decodeMatrix[k * (size + 1) + k];
}
for (var i = 0; i < accessorInfo.count; i++) {
for (var k = 0; k < size; k++) {
decodedArr[i * size + k] = arr[i * size + k] * decodeScale[k] + decodeOffset[k];
}
}
arr = decodedArr;
}
return arr;
}
function base64ToBinary(input, charStart) {
var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
var lookup = new Uint8Array(130);
for (var i = 0; i < chars.length; i++) {
lookup[chars.charCodeAt(i)] = i;
}
// Ignore
var len = input.length - charStart;
if (input.charAt(len - 1) === '=') { len--; }
if (input.charAt(len - 1) === '=') { len--; }
var uarray = new Uint8Array((len / 4) * 3);
for (var i = 0, j = charStart; i < uarray.length;) {
var c1 = lookup[input.charCodeAt(j++)];
var c2 = lookup[input.charCodeAt(j++)];
var c3 = lookup[input.charCodeAt(j++)];
var c4 = lookup[input.charCodeAt(j++)];
uarray[i++] = (c1 << 2) | (c2 >> 4);
uarray[i++] = ((c2 & 15) << 4) | (c3 >> 2);
uarray[i++] = ((c3 & 3) << 6) | c4;
}
return uarray.buffer;
}
/**
* @typedef {Object} clay.loader.GLTF.Result
* @property {Object} json
* @property {clay.Scene} scene
* @property {clay.Node} rootNode
* @property {clay.Camera[]} cameras
* @property {clay.Texture[]} textures
* @property {clay.Material[]} materials
* @property {clay.Skeleton[]} skeletons
* @property {clay.Mesh[]} meshes
* @property {clay.animation.TrackClip[]} clips
* @property {clay.Node[]} nodes
*/
/**
* @constructor clay.loader.GLTF
* @extends clay.core.Base
*/
var GLTFLoader = Base.extend(/** @lends clay.loader.GLTF# */ {
/**
*
* @type {clay.Node}
*/
rootNode: null,
/**
* Root path for uri parsing.
* @type {string}
*/
rootPath: null,
/**
* Root path for texture uri parsing. Defaultly use the rootPath
* @type {string}
*/
textureRootPath: null,
/**
* Root path for buffer uri parsing. Defaultly use the rootPath
* @type {string}
*/
bufferRootPath: null,
/**
* Shader used when creating the materials.
* @type {string|clay.Shader}
* @default 'clay.standard'
*/
shader: 'clay.standard',
/**
* If use {@link clay.StandardMaterial}
* @type {string}
*/
useStandardMaterial: false,
/**
* If loading the cameras.
* @type {boolean}
*/
includeCamera: true,
/**
* If loading the animations.
* @type {boolean}
*/
includeAnimation: true,
/**
* If loading the meshes
* @type {boolean}
*/
includeMesh: true,
/**
* If loading the textures.
* @type {boolean}
*/
includeTexture: true,
/**
* @type {string}
*/
crossOrigin: '',
/**
* @type {boolean}
* @see https://github.com/KhronosGroup/glTF/issues/674
*/
textureFlipY: false,
/**
* If convert texture to power-of-two
* @type {boolean}
*/
textureConvertToPOT: false,
shaderLibrary: null
},
function () {
if (!this.shaderLibrary) {
this.shaderLibrary = shaderLibrary.createLibrary();
}
},
/** @lends clay.loader.GLTF.prototype */
{
/**
* @param {string} url
*/
load: function (url) {
var self = this;
var isBinary = url.endsWith('.glb');
if (this.rootPath == null) {
this.rootPath = url.slice(0, url.lastIndexOf('/'));
}
vendor.request.get({
url: url,
onprogress: function (percent, loaded, total) {
self.trigger('progress', percent, loaded, total);
},
onerror: function (e) {
self.trigger('error', e);
},
responseType: isBinary ? 'arraybuffer' : 'text',
onload: function (data) {
if (isBinary) {
self.parseBinary(data);
}
else {
if (typeof data === 'string') {
data = JSON.parse(data);
}
self.parse(data);
}
}
});
},
/**
* Parse glTF binary
* @param {ArrayBuffer} buffer
* @return {clay.loader.GLTF.Result}
*/
parseBinary: function (buffer) {
var header = new Uint32Array(buffer, 0, 4);
if (header[0] !== 0x46546C67) {
this.trigger('error', 'Invalid glTF binary format: Invalid header');
return;
}
if (header[0] < 2) {
this.trigger('error', 'Only glTF2.0 is supported.');
return;
}
var dataView = new DataView(buffer, 12);
var json;
var buffers = [];
// Read chunks
for (var i = 0; i < dataView.byteLength;) {
var chunkLength = dataView.getUint32(i, true);
i += 4;
var chunkType = dataView.getUint32(i, true);
i += 4;
// json
if (chunkType === 0x4E4F534A) {
var arr = new Uint8Array(buffer, i + 12, chunkLength);
// TODO, for the browser not support TextDecoder.
var decoder = new TextDecoder();
var str = decoder.decode(arr);
try {
json = JSON.parse(str);
}
catch (e) {
this.trigger('error', 'JSON Parse error:' + e.toString());
return;
}
}
else if (chunkType === 0x004E4942) {
buffers.push(buffer.slice(i + 12, i + 12 + chunkLength));
}
i += chunkLength;
}
if (!json) {
this.trigger('error', 'Invalid glTF binary format: Can\'t find JSON.');
return;
}
return this.parse(json, buffers);
},
/**
* @param {Object} json
* @param {ArrayBuffer[]} [buffer]
* @return {clay.loader.GLTF.Result}
*/
parse: function (json, buffers) {
var self = this;
var lib = {
json: json,
buffers: [],
bufferViews: [],
materials: [],
textures: [],
meshes: [],
joints: [],
skeletons: [],
cameras: [],
nodes: [],
clips: []
};
// Mount on the root node if given
var rootNode = this.rootNode || new Scene();
var loading = 0;
function checkLoad() {
loading--;
if (loading === 0) {
afterLoadBuffer();
}
}
// If already load buffers
if (buffers) {
lib.buffers = buffers.slice();
afterLoadBuffer(true);
}
else {
// Load buffers
util.each(json.buffers, function (bufferInfo, idx) {
loading++;
var path = bufferInfo.uri;
self._loadBuffers(path, function (buffer) {
lib.buffers[idx] = buffer;
checkLoad();
}, checkLoad);
});
}
function getResult() {
return {
json: json,
scene: self.rootNode ? null : rootNode,
rootNode: self.rootNode ? rootNode : null,
cameras: lib.cameras,
textures: lib.textures,
materials: lib.materials,
skeletons: lib.skeletons,
meshes: lib.instancedMeshes,
clips: lib.clips,
nodes: lib.nodes
};
}
function afterLoadBuffer(immediately) {
// Buffer not load complete.
if (lib.buffers.length !== json.buffers.length) {
setTimeout(function () {
self.trigger('error', 'Buffer not load complete.');
});
return;
}
json.bufferViews.forEach(function (bufferViewInfo, idx) {
// PENDING Performance
lib.bufferViews[idx] = lib.buffers[bufferViewInfo.buffer]
.slice(bufferViewInfo.byteOffset || 0, (bufferViewInfo.byteOffset || 0) + (bufferViewInfo.byteLength || 0));
});
lib.buffers = null;
if (self.includeMesh) {
if (self.includeTexture) {
self._parseTextures(json, lib);
}
self._parseMaterials(json, lib);
self._parseMeshes(json, lib);
}
self._parseNodes(json, lib);
// Only support one scene.
if (json.scenes) {
var sceneInfo = json.scenes[json.scene || 0]; // Default use the first scene.
if (sceneInfo) {
for (var i = 0; i < sceneInfo.nodes.length; i++) {
var node = lib.nodes[sceneInfo.nodes[i]];
node.update();
rootNode.add(node);
}
}
}
if (self.includeMesh) {
self._parseSkins(json, lib);
}
if (self.includeAnimation) {
self._parseAnimations(json, lib);
}
if (immediately) {
setTimeout(function () {
self.trigger('success', getResult());
});
}
else {
self.trigger('success', getResult());
}
}
return getResult();
},
/**
* Binary file path resolver. User can override it
* @param {string} path
*/
resolveBufferPath: function (path) {
if (path && path.match(/^data:(.*?)base64,/)) {
return path;
}
var rootPath = this.bufferRootPath;
if (rootPath == null) {
rootPath = this.rootPath;
}
return util.relative2absolute(path, rootPath);
},
/**
* Texture file path resolver. User can override it
* @param {string} path
*/
resolveTexturePath: function (path) {
if (path && path.match(/^data:(.*?)base64,/)) {
return path;
}
var rootPath = this.textureRootPath;
if (rootPath == null) {
rootPath = this.rootPath;
}
return util.relative2absolute(path, rootPath);
},
/**
* Buffer loader
* @param {string}
* @param {Function} onsuccess
* @param {Function} onerror
*/
loadBuffer: function (path, onsuccess, onerror) {
vendor.request.get({
url: path,
responseType: 'arraybuffer',
onload: function (buffer) {
onsuccess && onsuccess(buffer);
},
onerror: function (buffer) {
onerror && onerror(buffer);
}
});
},
_getShader: function () {
if (typeof this.shader === 'string') {
return this.shaderLibrary.get(this.shader);
}
else if (this.shader instanceof Shader) {
return this.shader;
}
},
_loadBuffers: function (path, onsuccess, onerror) {
var base64Prefix = 'data:application/octet-stream;base64,';
var strStart = path.substr(0, base64Prefix.length);
if (strStart === base64Prefix) {
onsuccess(
base64ToBinary(path, base64Prefix.length)
);
}
else {
this.loadBuffer(
this.resolveBufferPath(path),
onsuccess,
onerror
);
}
},
// https://github.com/KhronosGroup/glTF/issues/100
// https://github.com/KhronosGroup/glTF/issues/193
_parseSkins: function (json, lib) {
// Create skeletons and joints
var haveInvBindMatrices = false;
util.each(json.skins, function (skinInfo, idx) {
var skeleton = new Skeleton({
name: skinInfo.name
});
for (var i = 0; i < skinInfo.joints.length; i++) {
var nodeIdx = skinInfo.joints[i];
var node = lib.nodes[nodeIdx];
var joint = new Joint({
name: node.name,
node: node,
index: skeleton.joints.length
});
skeleton.joints.push(joint);
}
skeleton.relativeRootNode = lib.nodes[skinInfo.skeleton] || this.rootNode;
if (skinInfo.inverseBindMatrices) {
haveInvBindMatrices = true;
var IBMInfo = json.accessors[skinInfo.inverseBindMatrices];
var buffer = lib.bufferViews[IBMInfo.bufferView];
var offset = IBMInfo.byteOffset || 0;
var size = IBMInfo.count * 16;
var array = new vendor.Float32Array(buffer, offset, size);
skeleton.setJointMatricesArray(array);
}
else {
skeleton.updateJointMatrices();
}
lib.skeletons[idx] = skeleton;
}, this);
function enableSkinningForMesh(mesh, skeleton, jointIndices) {
mesh.skeleton = skeleton;
mesh.joints = jointIndices;
if (!skeleton.boundingBox) {
skeleton.updateJointsBoundingBoxes(mesh.geometry);
}
}
function getJointIndex(joint) {
return joint.index;
}
util.each(json.nodes, function (nodeInfo, nodeIdx) {
if (nodeInfo.skin != null) {
var skinIdx = nodeInfo.skin;
var skeleton = lib.skeletons[skinIdx];
var node = lib.nodes[nodeIdx];
var jointIndices = skeleton.joints.map(getJointIndex);
if (node instanceof Mesh) {
enableSkinningForMesh(node, skeleton, jointIndices);
}
else {
// Mesh have multiple primitives
var children = node.children();
for (var i = 0; i < children.length; i++) {
enableSkinningForMesh(children[i], skeleton, jointIndices);
}
}
}
}, this);
},
_parseTextures: function (json, lib) {
util.each(json.textures, function (textureInfo, idx){
// samplers is optional
var samplerInfo = (json.samplers && json.samplers[textureInfo.sampler]) || {};
var parameters = {};
['wrapS', 'wrapT', 'magFilter', 'minFilter'].forEach(function (name) {
var value = samplerInfo[name];
if (value != null) {
parameters[name] = value;
}
});
util.defaults(parameters, {
wrapS: Texture.REPEAT,
wrapT: Texture.REPEAT,
flipY: this.textureFlipY,
convertToPOT: this.textureConvertToPOT
});
var target = textureInfo.target || glenum.TEXTURE_2D;
var format = textureInfo.format;
if (format != null) {
parameters.format = format;
}
if (target === glenum.TEXTURE_2D) {
var texture = new Texture2D(parameters);
var imageInfo = json.images[textureInfo.source];
var uri;
if (imageInfo.uri) {
uri = this.resolveTexturePath(imageInfo.uri);
}
else if (imageInfo.bufferView != null) {
uri = URL.createObjectURL(new Blob([lib.bufferViews[imageInfo.bufferView]], {
type: imageInfo.mimeType
}));
}
if (uri) {
texture.load(uri, this.crossOrigin);
lib.textures[idx] = texture;
}
}
}, this);
},
_KHRCommonMaterialToStandard: function (materialInfo, lib) {
var uniforms = {};
var commonMaterialInfo = materialInfo.extensions['KHR_materials_common'];
uniforms = commonMaterialInfo.values || {};
if (typeof uniforms.diffuse === 'number') {
uniforms.diffuse = lib.textures[uniforms.diffuse] || null;
}
if (typeof uniforms.emission === 'number') {
uniforms.emission = lib.textures[uniforms.emission] || null;
}
var enabledTextures = [];
if (uniforms['diffuse'] instanceof Texture2D) {
enabledTextures.push('diffuseMap');
}
if (materialInfo.normalTexture) {
enabledTextures.push('normalMap');
}
if (uniforms['emission'] instanceof Texture2D) {
enabledTextures.push('emissiveMap');
}
var material;
var isStandardMaterial = this.useStandardMaterial;
if (isStandardMaterial) {
material = new StandardMaterial({
name: materialInfo.name,
doubleSided: materialInfo.doubleSided
});
}
else {
material = new Material({
name: materialInfo.name,
shader: this._getShader()
});
material.define('fragment', 'USE_ROUGHNESS');
material.define('fragment', 'USE_METALNESS');
if (materialInfo.doubleSided) {
material.define('fragment', 'DOUBLE_SIDED');
}
}
if (uniforms.transparent) {
material.depthMask = false;
material.depthTest = true;
material.transparent = true;
}
var diffuseProp = uniforms['diffuse'];
if (diffuseProp) {
// Color
if (Array.isArray(diffuseProp)) {
diffuseProp = diffuseProp.slice(0, 3);
isStandardMaterial ? (material.color = diffuseProp)
: material.set('color', diffuseProp);
}
else { // Texture
isStandardMaterial ? (material.diffuseMap = diffuseProp)
: material.set('diffuseMap', diffuseProp);
}
}
var emissionProp = uniforms['emission'];
if (emissionProp != null) {
// Color
if (Array.isArray(emissionProp)) {
emissionProp = emissionProp.slice(0, 3);
isStandardMaterial ? (material.emission = emissionProp)
: material.set('emission', emissionProp);
}
else { // Texture
isStandardMaterial ? (material.emissiveMap = emissionProp)
: material.set('emissiveMap', emissionProp);
}
}
if (materialInfo.normalTexture != null) {
// TODO texCoord
var normalTextureIndex = materialInfo.normalTexture.index;
if (isStandardMaterial) {
material.normalMap = lib.textures[normalTextureIndex] || null;
}
else {
material.set('normalMap', lib.textures[normalTextureIndex] || null);
}
}
if (uniforms['shininess'] != null) {
var glossiness = Math.log(uniforms['shininess']) / Math.log(8192);
// Uniform glossiness
material.set('glossiness', glossiness);
material.set('roughness', 1 - glossiness);
}
else {
material.set('glossiness', 0.3);
material.set('roughness', 0.3);
}
if (uniforms['specular'] != null) {
material.set('specularColor', uniforms['specular'].slice(0, 3));
}
if (uniforms['transparency'] != null) {
material.set('alpha', uniforms['transparency']);
}
return material;
},
_pbrMetallicRoughnessToStandard: function (materialInfo, metallicRoughnessMatInfo, lib) {
var alphaTest = materialInfo.alphaMode === 'MASK';
var isStandardMaterial = this.useStandardMaterial;
var material;
var diffuseMap, roughnessMap, metalnessMap, normalMap, emissiveMap, occlusionMap;
var enabledTextures = [];
/**
* The scalar multiplier applied to each normal vector of the normal texture.
*
* @type {number}
*
* XXX This value is ignored if `materialInfo.normalTexture` is not specified.
*/
var normalScale = 1.0;
// TODO texCoord
if (metallicRoughnessMatInfo.baseColorTexture) {
diffuseMap = lib.textures[metallicRoughnessMatInfo.baseColorTexture.index] || null;
diffuseMap && enabledTextures.push('diffuseMap');
}
if (metallicRoughnessMatInfo.metallicRoughnessTexture) {
roughnessMap = metalnessMap = lib.textures[metallicRoughnessMatInfo.metallicRoughnessTexture.index] || null;
roughnessMap && enabledTextures.push('metalnessMap', 'roughnessMap');
}
if (materialInfo.normalTexture) {
normalMap = lib.textures[materialInfo.normalTexture.index] || null;
normalMap && enabledTextures.push('normalMap');
if (typeof materialInfo.normalTexture.scale === 'number') {
normalScale = materialInfo.normalTexture.scale;
}
}
if (materialInfo.emissiveTexture) {
emissiveMap = lib.textures[materialInfo.emissiveTexture.index] || null;
emissiveMap && enabledTextures.push('emissiveMap');
}
if (materialInfo.occlusionTexture) {
occlusionMap = lib.textures[materialInfo.occlusionTexture.index] || null;
occlusionMap && enabledTextures.push('occlusionMap');
}
var baseColor = metallicRoughnessMatInfo.baseColorFactor || [1, 1, 1, 1];
var commonProperties = {
diffuseMap: diffuseMap || null,
roughnessMap: roughnessMap || null,
metalnessMap: metalnessMap || null,
normalMap: normalMap || null,
occlusionMap: occlusionMap || null,
emissiveMap: emissiveMap || null,
color: baseColor.slice(0, 3),
alpha: baseColor[3],
metalness: metallicRoughnessMatInfo.metallicFactor || 0,
roughness: metallicRoughnessMatInfo.roughnessFactor || 0,
emission: materialInfo.emissiveFactor || [0, 0, 0],
emissionIntensity: 1,
alphaCutoff: materialInfo.alphaCutoff || 0.5,
normalScale: normalScale
};
if (commonProperties.roughnessMap) {
// In glTF metallicFactor will do multiply, which is different from StandardMaterial.
// So simply ignore it
commonProperties.metalness = 0.5;
commonProperties.roughness = 0.5;
}
if (isStandardMaterial) {
material = new StandardMaterial(util.extend({
name: materialInfo.name,
alphaTest: alphaTest,
doubleSided: materialInfo.doubleSided,
// G channel
roughnessChannel: 1,
// B Channel
metalnessChannel: 2
}, commonProperties));
}
else {
material = new Material({
name: materialInfo.name,
shader: this._getShader()
});
material.define('fragment', 'USE_ROUGHNESS');
material.define('fragment', 'USE_METALNESS');
material.define('fragment', 'ROUGHNESS_CHANNEL', 1);
material.define('fragment', 'METALNESS_CHANNEL', 2);
material.define('fragment', 'DIFFUSEMAP_ALPHA_ALPHA');
if (alphaTest) {
material.define('fragment', 'ALPHA_TEST');
}
if (materialInfo.doubleSided) {
material.define('fragment', 'DOUBLE_SIDED');
}
material.set(commonProperties);
}
if (materialInfo.alphaMode === 'BLEND') {
material.depthMask = false;
material.depthTest = true;
material.transparent = true;
}
return material;
},
_pbrSpecularGlossinessToStandard: function (materialInfo, specularGlossinessMatInfo, lib) {
var alphaTest = materialInfo.alphaMode === 'MASK';
if (this.useStandardMaterial) {
console.error('StandardMaterial doesn\'t support specular glossiness workflow yet');
}
var material;
var diffuseMap, glossinessMap, specularMap, normalMap, emissiveMap, occlusionMap;
var enabledTextures = [];
// TODO texCoord
if (specularGlossinessMatInfo.diffuseTexture) {
diffuseMap = lib.textures[specularGlossinessMatInfo.diffuseTexture.index] || null;
diffuseMap && enabledTextures.push('diffuseMap');
}
if (specularGlossinessMatInfo.specularGlossinessTexture) {
glossinessMap = specularMap = lib.textures[specularGlossinessMatInfo.specularGlossinessTexture.index] || null;
glossinessMap && enabledTextures.push('specularMap', 'glossinessMap');
}
if (materialInfo.normalTexture) {
normalMap = lib.textures[materialInfo.normalTexture.index] || null;
normalMap && enabledTextures.push('normalMap');
}
if (materialInfo.emissiveTexture) {
emissiveMap = lib.textures[materialInfo.emissiveTexture.index] || null;
emissiveMap && enabledTextures.push('emissiveMap');
}
if (materialInfo.occlusionTexture) {
occlusionMap = lib.textures[materialInfo.occlusionTexture.index] || null;
occlusionMap && enabledTextures.push('occlusionMap');
}
var diffuseColor = specularGlossinessMatInfo.diffuseFactor || [1, 1, 1, 1];
var commonProperties = {
diffuseMap: diffuseMap || null,
glossinessMap: glossinessMap || null,
specularMap: specularMap || null,
normalMap: normalMap || null,
emissiveMap: emissiveMap || null,
occlusionMap: occlusionMap || null,
color: diffuseColor.slice(0, 3),
alpha: diffuseColor[3],
specularColor: specularGlossinessMatInfo.specularFactor || [1, 1, 1],
glossiness: specularGlossinessMatInfo.glossinessFactor || 0,
emission: materialInfo.emissiveFactor || [0, 0, 0],
emissionIntensity: 1,
alphaCutoff: materialInfo.alphaCutoff == null ? 0.5 : materialInfo.alphaCutoff
};
if (commonProperties.glossinessMap) {
// Ignore specularFactor
commonProperties.glossiness = 0.5;
}
if (commonProperties.specularMap) {
// Ignore specularFactor
commonProperties.specularColor = [1, 1, 1];
}
material = new Material({
name: materialInfo.name,
shader: this._getShader()
});
material.define('fragment', 'GLOSSINESS_CHANNEL', 3);
material.define('fragment', 'DIFFUSEMAP_ALPHA_ALPHA');
if (alphaTest) {
material.define('fragment', 'ALPHA_TEST');
}
if (materialInfo.doubleSided) {
material.define('fragment', 'DOUBLE_SIDED');
}
material.set(commonProperties);
if (materialInfo.alphaMode === 'BLEND') {
material.depthMask = false;
material.depthTest = true;
material.transparent = true;
}
return material;
},
_parseMaterials: function (json, lib) {
util.each(json.materials, function (materialInfo, idx) {
if (materialInfo.extensions && materialInfo.extensions['KHR_materials_common']) {
lib.materials[idx] = this._KHRCommonMaterialToStandard(materialInfo, lib);
}
else if (materialInfo.extensions && materialInfo.extensions['KHR_materials_pbrSpecularGlossiness']) {
lib.materials[idx] = this._pbrSpecularGlossinessToStandard(materialInfo, materialInfo.extensions['KHR_materials_pbrSpecularGlossiness'], lib);
}
else {
lib.materials[idx] = this._pbrMetallicRoughnessToStandard(materialInfo, materialInfo.pbrMetallicRoughness || {}, lib);
}
}, this);
},
_parseMeshes: function (json, lib) {
var self = this;
util.each(json.meshes, function (meshInfo, idx) {
lib.meshes[idx] = [];
// Geometry
for (var pp = 0; pp < meshInfo.primitives.length; pp++) {
var primitiveInfo = meshInfo.primitives[pp];
var geometry = new Geometry({
dynamic: false,
// PENDIGN
name: meshInfo.name,
boundingBox: new BoundingBox()
});
// Parse attributes
var semantics = Object.keys(primitiveInfo.attributes);
for (var ss = 0; ss < semantics.length; ss++) {
var semantic = semantics[ss];
var accessorIdx = primitiveInfo.attributes[semantic];
var attributeInfo = json.accessors[accessorIdx];
var attributeName = semanticAttributeMap[semantic];
if (!attributeName) {
continue;
}
var size = SIZE_MAP[attributeInfo.type];
var attributeArray = getAccessorData(json, lib, accessorIdx);
// WebGL attribute buffer not support uint32.
// Direct use Float32Array may also have issue.
if (attributeArray instanceof vendor.Uint32Array) {
attributeArray = new Float32Array(attributeArray);
}
if (semantic === 'WEIGHTS_0' && size === 4) {
// Weight data in QTEK has only 3 component, the last component can be evaluated since it is normalized
var weightArray = new attributeArray.constructor(attributeInfo.count * 3);
for (var i = 0; i < attributeInfo.count; i++) {
var i4 = i * 4, i3 = i * 3;
var w1 = attributeArray[i4], w2 = attributeArray[i4 + 1], w3 = attributeArray[i4 + 2], w4 = attributeArray[i4 + 3];
var wSum = w1 + w2 + w3 + w4;
weightArray[i3] = w1 / wSum;
weightArray[i3 + 1] = w2 / wSum;
weightArray[i3 + 2] = w3 / wSum;
}
geometry.attributes[attributeName].value = weightArray;
}
else if (semantic === 'COLOR_0' && size === 3) {
var colorArray = new attributeArray.constructor(attributeInfo.count * 4);
for (var i = 0; i < attributeInfo.count; i++) {
var i4 = i * 4, i3 = i * 3;
colorArray[i4] = attributeArray[i3];
colorArray[i4 + 1] = attributeArray[i3 + 1];
colorArray[i4 + 2] = attributeArray[i3 + 2];
colorArray[i4 + 3] = 1;
}