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Merge pull request #59 from 06wj/master
Update library for Hilo3d and glTF Loader
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,184 @@ | ||
| (function() { | ||
| var Class = Hilo3d.Class; | ||
| var BasicLoader = Hilo3d.BasicLoader; | ||
| var Geometry = Hilo3d.Geometry; | ||
| var GeometryData = Hilo3d.GeometryData; | ||
|
|
||
| var dracoDecoder = window.dracoDecoder = new DracoDecoderModule(); | ||
| dracoDecoder.onModuleLoaded = function(module) { | ||
| dracoDecoder = module; | ||
| } | ||
|
|
||
| function getAttributeData(decoder, dracoGeometry, attribute) { | ||
| if (attribute.ptr === 0) { | ||
| return null; | ||
| } | ||
|
|
||
| var numComponents = attribute.num_components(); | ||
| var attributeData = new dracoDecoder.DracoFloat32Array(); | ||
|
|
||
| decoder.GetAttributeFloatForAllPoints(dracoGeometry, attribute, attributeData); | ||
| var numPoints = dracoGeometry.num_points(); | ||
| var numValues = numPoints * numComponents; | ||
| var result = new Float32Array(numValues); | ||
| for (var i = 0; i < numValues; i++) { | ||
| result[i] = attributeData.GetValue(i); | ||
| } | ||
| return result; | ||
| } | ||
|
|
||
| function decode(byteArray, info, primitive) { | ||
| var attributesMap = info.attributes; | ||
| var buffer = new dracoDecoder.DecoderBuffer(); | ||
| buffer.Init(byteArray, byteArray.byteLength); | ||
| var decoder = new dracoDecoder.Decoder(); | ||
|
|
||
| var geometryType = decoder.GetEncodedGeometryType(buffer); | ||
| var dracoGeometry, decodingStatus; | ||
| if (geometryType == dracoDecoder.TRIANGULAR_MESH) { | ||
| dracoGeometry = new dracoDecoder.Mesh(); | ||
| decodingStatus = decoder.DecodeBufferToMesh(buffer, dracoGeometry); | ||
| } else { | ||
| dracoGeometry = new dracoDecoder.PointCloud(); | ||
| decodingStatus = decoder.DecodeBufferToPointCloud(buffer, dracoGeometry); | ||
| } | ||
|
|
||
| if (!decodingStatus.ok() || dracoGeometry.ptr == 0) { | ||
| console.error('decodingStatus error'); | ||
| return; | ||
| } | ||
| dracoDecoder.destroy(buffer); | ||
|
|
||
| var geometry = primitive._geometry || new Geometry(); | ||
|
|
||
| var numFaces = dracoGeometry.num_faces(); | ||
| var numPoints = dracoGeometry.num_points(); | ||
| // Verify if there is position attribute. | ||
| var posAttId = decoder.GetAttributeId(dracoGeometry, | ||
| dracoDecoder.POSITION); | ||
| if (posAttId == -1) { | ||
| var errorMsg = 'THREE.DRACOLoader: No position attribute found.'; | ||
| console.error(errorMsg); | ||
| dracoDecoder.destroy(decoder); | ||
| dracoDecoder.destroy(dracoGeometry); | ||
| throw new Error(errorMsg); | ||
| } | ||
| var posAttribute = decoder.GetAttribute(dracoGeometry, posAttId); | ||
| var posTransform = new dracoDecoder.AttributeQuantizationTransform(); | ||
| if (posTransform.InitFromAttribute(posAttribute)) { | ||
|
|
||
| } | ||
|
|
||
| var dracoAttributesMap = { | ||
| POSITION: ['vertices', 3], | ||
| NORMAL: ['normals', 3], | ||
| TANGENT: ['tangents', 4], | ||
| TEX_COORD: ['uvs', 2], | ||
| TEXCOORD_0: ['uvs', 2], | ||
| TEXCOORD_1: ['uvs1', 2], | ||
| COLOR: ['color', 2], | ||
| COLOR_0: ['color', 2], | ||
| JOINTS_0: ['skinIndices', 4], | ||
| WEIGHTS_0: ['skinWeights', 4], | ||
| }; | ||
|
|
||
| var attributeUsedMap = {}; | ||
| for (var attributeName in dracoAttributesMap) { | ||
| var info = dracoAttributesMap[attributeName]; | ||
| var attId = decoder.GetAttributeId(dracoGeometry, dracoDecoder[attributeName]); | ||
| if (dracoDecoder[attributeName] !== undefined && attId !== -1) { | ||
| var attribute = decoder.GetAttribute(dracoGeometry, attId); | ||
| var data = getAttributeData(decoder, dracoGeometry, attribute); | ||
| if (data) { | ||
| geometry[info[0]] = new GeometryData(data, info[1]); | ||
| } | ||
| attributeUsedMap[info[0]] = true; | ||
| } | ||
| } | ||
|
|
||
| for (var attributeName in attributesMap) { | ||
| var info = dracoAttributesMap[attributeName]; | ||
| if (!info) { | ||
| console.warn(attributeName + ' not exist'); | ||
| continue; | ||
| } | ||
| if (attributeUsedMap[info[0]]) { | ||
| continue; | ||
| } | ||
| var attributeId = attributesMap[attributeName]; | ||
| var attribute = decoder.GetAttributeByUniqueId(dracoGeometry, | ||
| attributeId); | ||
| var data = getAttributeData(decoder, dracoGeometry, attribute); | ||
| if (data) { | ||
| geometry[info[0]] = new GeometryData(data, info[1]); | ||
| } | ||
| } | ||
|
|
||
| if (geometry._tangents) { | ||
| if (geometry._tangents.length > geometry.vertices.length) { | ||
| geometry._tangents.stride = 16; | ||
| geometry._tangents.size = 3; | ||
| } | ||
| } | ||
|
|
||
| if (geometry.skinIndices) { | ||
| var x = geometry.skinIndices.data; | ||
| for (var i = x.length - 1; i >= 0; i--) { | ||
| x[i] = Math.round(x[i]); | ||
| } | ||
| } | ||
|
|
||
| var indicesArray; | ||
| if (numPoints > 65535) { | ||
| indicesArray = new Uint32Array(numFaces * 3); | ||
| } else { | ||
| indicesArray = new Uint16Array(numFaces * 3); | ||
| } | ||
| var ia = new dracoDecoder.DracoInt32Array(); | ||
| for (var i = 0; i < numFaces; i++) { | ||
| decoder.GetFaceFromMesh(dracoGeometry, i, ia); | ||
| var idx = i * 3; | ||
| indicesArray[idx] = ia.GetValue(0); | ||
| indicesArray[idx + 1] = ia.GetValue(1); | ||
| indicesArray[idx + 2] = ia.GetValue(2); | ||
| } | ||
| geometry.indices = new GeometryData(indicesArray, 1); | ||
|
|
||
| dracoDecoder.destroy(ia); | ||
| dracoDecoder.destroy(dracoGeometry); | ||
| dracoDecoder.destroy(decoder); | ||
| return geometry; | ||
| } | ||
|
|
||
|
|
||
| var DracoLoader = Class.create({ | ||
| Extends: BasicLoader, | ||
| Statics: { | ||
| decode: decode | ||
| }, | ||
| constructor: function() { | ||
| DracoLoader.superclass.constructor.call(this); | ||
| }, | ||
| load: function(params) { | ||
| return this.loadRes(params.src, 'buffer') | ||
| .then(function(data) { | ||
| return decode(data); | ||
| }).catch(function(err) { | ||
| console.warn('load draco failed', err); | ||
| throw err; | ||
| }); | ||
| } | ||
| }); | ||
|
|
||
| Hilo3d.DracoLoader = DracoLoader; | ||
| Hilo3d.Loader.addLoader('drc', DracoLoader); | ||
|
|
||
| Hilo3d.GLTFParser.extensionHandlers.KHR_draco_mesh_compression = { | ||
| parse: function(info, parser, result, primitive) { | ||
| var bufferView = parser.bufferViews[info.bufferView]; | ||
| var uintArray = new Uint8Array(bufferView.buffer, bufferView.byteOffset, bufferView.byteLength); | ||
| var geometry = decode(uintArray, info, primitive); | ||
| return geometry; | ||
| } | ||
| }; | ||
| })(); |
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