@smoud/tiny
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Fast and tiny JavaScript library for HTML5 game and playable ads creation.
1,754 lines (1,201 loc) • 61.9 kB
JavaScript
/**
* @author Rich Tibbett / https://github.com/richtr
* @author mrdoob / http://mrdoob.com/
* @author Tony Parisi / http://www.tonyparisi.com/
* @author Takahiro / https://github.com/takahirox
* @author Don McCurdy / https://www.donmccurdy.com
*/
var _RESERVED_CHARS_RE = '\\[\\]\\.:\\/';
var _reservedRe = new RegExp('[' + _RESERVED_CHARS_RE + ']', 'g');
function loadBase64(url) {
// Check for data: URI
var dataUriRegex = /^data:(.*?)(;base64)?,(.*)$/;
var dataUriRegexResult = url.match(dataUriRegex);
if (dataUriRegexResult) {
var data = dataUriRegexResult[3];
data = decodeURIComponent(data);
data = atob(data);
var view = new Uint8Array(data.length);
for (var i = 0; i < data.length; i++) {
view[i] = data.charCodeAt(i);
}
return view.buffer;
} else {
throw new Error("Data isn't a base64 format");
}
}
function GLTFLoader() {
this.dracoLoader = null;
}
GLTFLoader.prototype = Object.assign({}, {
constructor: GLTFLoader,
setDRACOLoader: function (dracoLoader) {
this.dracoLoader = dracoLoader;
return this;
},
parse: function (data, path, onLoad, onError) {
var content = data;
var extensions = {};
var json = JSON.parse(content);
if (json.asset === undefined || json.asset.version[0] < 2) {
if (onError) onError(new Error('Tiny.GLTFLoader: Unsupported asset. glTF versions >=2.0 are supported.'));
return;
}
// @TODO Horch check if need
// 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('Tiny.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('Tiny.GLTFLoader: Attempting to load .dds texture without importing Tiny.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 || [];
}
/* 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: Tiny.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('Tiny.GLTFLoader: Unsupported glTF-Binary header.');
} else if (this.header.version < 2.0) {
throw new Error('Tiny.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 = Tiny.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('Tiny.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('Tiny.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) {
var json = this.json;
var dracoLoader = this.dracoLoader;
var bufferViewIndex = primitive.extensions[this.name].bufferView;
var gltfAttributeMap = primitive.extensions[this.name].attributes;
var threeAttributeMap = {};
var attributeNormalizedMap = {};
var attributeTypeMap = {};
for (var attributeName in gltfAttributeMap) {
var threeAttributeName = ATTRIBUTES[attributeName] || attributeName.toLowerCase();
threeAttributeMap[threeAttributeName] = gltfAttributeMap[attributeName];
}
for (attributeName in primitive.attributes) {
var threeAttributeName = ATTRIBUTES[attributeName] || attributeName.toLowerCase();
if (gltfAttributeMap[attributeName] !== undefined) {
var accessorDef = json.accessors[primitive.attributes[attributeName]];
var componentType = WEBGL_COMPONENT_TYPES[accessorDef.componentType];
attributeTypeMap[threeAttributeName] = componentType;
attributeNormalizedMap[threeAttributeName] = accessorDef.normalized === true;
}
}
// return parser.getDependency('bufferView', bufferViewIndex).then(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('Tiny.GLTFLoader: Custom UV sets in "' + this.name + '" extension not yet supported.');
}
texture.needsUpdate = true;
return texture;
};
/**
* 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) {
//
// Tiny.Interpolant.call(this, parameterPositions, sampleValues, sampleSize, resultBuffer);
//
// }
//
// GLTFCubicSplineInterpolant.prototype = Object.create(Tiny.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: Tiny.NearestFilter,
9729: Tiny.LinearFilter,
9984: Tiny.NearestMipmapNearestFilter,
9985: Tiny.LinearMipmapNearestFilter,
9986: Tiny.NearestMipmapLinearFilter,
9987: Tiny.LinearMipmapLinearFilter
};
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: Tiny.InterpolateLinear,
STEP: Tiny.InterpolateDiscrete
};
/* 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 Tiny.MeshLambertMaterial();
}
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 {Tiny.Object3D|Tiny.Material|Tiny.Geometry} 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('Tiny.GLTFLoader: Ignoring primitive type .extras, ' + gltfDef.extras);
}
}
}
// @TODO Horch check if need
/**
* Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#morph-targets
*
* @param {Tiny.Geometry} geometry
* @param {Array<GLTF.Target>} targets
* @param {GLTFParser} parser
* @return {Tiny.Geometry}
*/
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 {Tiny.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('Tiny.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();
// Geometry caching
this.primitiveCache = {};
}
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();
var dependencies = [
this.getDependencies('scene'),
this.getDependencies('animation'),
];
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);
};
/**
* 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 Tiny.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 {Tiny.Object3D|Tiny.Material|Tiny.Texture|Tiny.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 'skin':
dependency = this.loadSkin(index);
break;
case 'animation':
dependency = this.loadAnimation(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 {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 = 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 {ArrayBuffer}
*/
GLTFParser.prototype.loadBuffer = function (bufferIndex) {
var bufferDef = this.json.buffers[bufferIndex];
if (bufferDef.type && bufferDef.type !== 'arraybuffer') {
throw new Error('Tiny.GLTFLoader: ' + bufferDef.type + ' buffer type is not supported.');
}
return loadBase64(bufferDef.uri);
};
/**
* Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views
* @param {number} bufferViewIndex
* @return {ArrayBuffer}
*/
GLTFParser.prototype.loadBufferView = function (bufferViewIndex) {
var bufferViewDef = this.json.bufferViews[bufferViewIndex];
var buffer = this.getDependency('buffer', bufferViewDef.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 {Tiny.Attribute|Tiny.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) {
return null;
}
var bufferViews = [];
if (accessorDef.bufferView !== undefined) {
bufferViews.push(this.getDependency('bufferView', accessorDef.bufferView));
} else {
bufferViews.push(null);
}
if (accessorDef.sparse !== undefined) {
bufferViews.push(this.getDependency('bufferView', accessorDef.sparse.indices.bufferView));
bufferViews.push(this.getDependency('bufferView', accessorDef.sparse.values.bufferView));
}
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 Tiny.InterleavedBuffer(array, byteStride / elementBytes);
parser.cache.add(ibCacheKey, ib);
}
bufferAttribute = new Tiny.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 Tiny.Attribute(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 Tiny.Attribute(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('Tiny.GLTFLoader: Unsupported itemSize in sparse BufferAttribute.');
}
}
return bufferAttribute;
};
/**
* 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 {Tiny.Mesh} 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 = mesh.geometry.morphAttributes && 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 Tiny.PointsMaterial();
Tiny.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 Tiny.LineBasicMaterial();
Tiny.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 = Tiny.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 Tiny.Attribute(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/Tiny.js/issues/11438#issuecomment-507003995
// if (material.normalScale && !useVertexTangents) {
//
// material.normalScale.y = -material.normalScale.y;
//
// }
mesh.material = material;
};
/**
* @param {Tiny.Geometry} geometry
* @param {GLTF.Primitive} primitiveDef
* @param {GLTFParser} parser
*/
function computeBounds(geometry, primitiveDef, parser) {
var attributes = primitiveDef.attributes;
var box = new Tiny.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 Tiny.Vector3(min[0], min[1], min[2]),
new Tiny.Vector3(max[0], max[1], max[2]));
} else {
console.warn('Tiny.GLTFLoader: Missing min/max properties for accessor POSITION.');
return;
}
} else {
return;
}
var targets = primitiveDef.targets;
if (targets !== undefined) {
var vector = new Tiny.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('Tiny.GLTFLoader: Missing min/max properties for accessor POSITION.');
}
}
}
}
geometry.boundingBox = box;
var sphere = new Tiny.Sphere();
box.getCenter(sphere.center);
sphere.radius = box.min.distanceTo(box.max) / 2;
geometry.boundingSphere = sphere;
}
/**
* @param {Tiny.Geometry} geometry
* @param {GLTF.Primitive} primitiveDef
* @param {GLTFParser} parser
* @return {Tiny.Geometry}
*/
function addPrimitiveAttributes(geometry, primitiveDef, parser) {
var attributes = primitiveDef.attributes;
function assignAttributeAccessor(accessorIndex, attributeName) {
var accessor = parser.getDependency('accessor', accessorIndex);
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;
assignAttributeAccessor(attributes[gltfAttributeName], threeAttributeName);
}
if (primitiveDef.indices !== undefined && !geometry.index) {
var accessor = parser.getDependency('accessor', primitiveDef.indices);
geometry.setIndex(accessor);
}
assignExtrasToUserData(geometry, primitiveDef);
// computeBounds(geometry, primitiveDef, parser);
return primitiveDef.targets !== undefined
? addMorphTargets(geometry, primitiveDef.targets, parser)
: geometry;
}
/**
* @param {Tiny.Geometry} geometry
* @param {Number} drawMode
* @return {Tiny.Geometry}
*/
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('Tiny.GLTFLoader.toTrianglesDrawMode(): Undefined position attribute. Processing not possible.');
return geometry;
}
}
//
var numberOfTriangles = index.count - 2;
var newIndices = [];
if (drawMode === Tiny.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('Tiny.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 {Array<Tiny.Geometry>}
*/
GLTFParser.prototype.loadGeometries = function (primitives) {
var parser = this;
var extensions = this.extensions;
var cache = this.primitiveCache;
// @TODO horch add graco later
function createDracoPrimitive(primitive) {
return extensions[EXTENSIONS.KHR_DRACO_MESH_COMPRESSION]
.decodePrimitive(primitive, parser)
.then(function (geometry) {
return addPrimitiveAttributes(geometry, primitive, parser);
});
}
var geometries = [];
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
geometries.push(cached.geometry);
} else {
var geometry;
if (primitive.extensions && primitive.extensions[EXTENSIONS.KHR_DRACO_MESH_COMPRESSION]) {
// Use DRACO geometry if available
geometry = createDracoPrimitive(primitive);
} else {
// Otherwise create a new geometry
geometry = addPrimitiveAttributes(new Tiny.Geometry(), primitive, parser);
}
// Cache this geometry
cache[cacheKey] = {primitive: primitive, geometry};
geometries.push(geometry);
}
}
return geometries;
};
/**
* Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#meshes
* @param {number} meshIndex
* @return {Tiny.Object3D|Tiny.Mesh|Tiny.SkinnedMesh}
*/
GLTFParser.prototype.loadMesh = function (meshIndex) {
var parser = this;
var json = this.json;
var meshDef = json.meshes[meshIndex];
var primitives = meshDef.primitives;
var materials = [];
for (var i = 0, il = primitives.length; i < il; i++) {
var material = createDefaultMaterial(this.cache);
materials.push(material);
}
var geometries = parser.loadGeometries(primitives);
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 Tiny.SkinnedMesh(geometry, material)
: new Tiny.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, Tiny.TriangleStripDrawMode);
} else if (primitive.mode === WEBGL_CONSTANTS.TRIANGLE_FAN) {
mesh.geometry = toTrianglesDrawMode(mesh.geometry, Tiny.TriangleFanDrawMode);
}
} else if (primitive.mode === WEBGL_CONSTANTS.LINES) {
mesh = new Tiny.LineSegments(geometry, material);
} else if (primitive.mode === WEBGL_CONSTANTS.LINE_STRIP) {
mesh = new Tiny.Line(geometry, material);
} else if (primitive.mode === WEBGL_CONSTANTS.LINE_LOOP) {
mesh = new Tiny.LineLoop(geometry, material);
} else if (primitive.mode === WEBGL_CONSTANTS.POINTS) {
mesh = new Tiny.Points(geometry, material);
} else {
throw new Error('Tiny.GLTFLoader: Primitive mode unsupported: ' + primitive.mode);
}
if (mesh.geometry.morphAttributes && 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 Tiny.Object3D();
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#skins
* @param {number} skinIndex
* @return {Object}
*/
GLTFParser.prototype.loadSkin = function (skinIndex) {
var skinDef = this.json.skins[skinIndex];
var skinEntry = {joints: skinDef.joints};
if (skinDef.inverseBindMatrices === undefined) {
return skinEntry;
}
var accessor = this.getDependency('accessor', skinDef.inverseBindMatrices);
skinEntry.inverseBindMatrices = accessor;
return skinEntry;
};
/**
* Specification: https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#animations
* @param {number} animationIndex
* @return {Tiny.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 !== undefine