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playcanvas-gltf.js
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playcanvas-gltf.js
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Object.assign(window, function () {
// Math utility functions
function nearestPow2(n) {
return Math.pow(2, Math.round(Math.log(n) / Math.log(2)));
}
function isPowerOf2(n) {
return n && (n & (n - 1)) === 0;
}
function getPrimitiveType(primitive) {
var primType = pc.PRIMITIVE_TRIANGLES;
if (primitive.hasOwnProperty('mode')) {
switch (primitive.mode) {
case 0: primType = pc.PRIMITIVE_POINTS; break;
case 1: primType = pc.PRIMITIVE_LINES; break;
case 2: primType = pc.PRIMITIVE_LINELOOP; break;
case 3: primType = pc.PRIMITIVE_LINESTRIP; break;
case 4: primType = pc.PRIMITIVE_TRIANGLES; break;
case 5: primType = pc.PRIMITIVE_TRISTRIP; break;
case 6: primType = pc.PRIMITIVE_TRIFAN; break;
}
}
return primType;
}
function getAccessorTypeSize(type) {
var size = 3;
switch (type) {
case 'SCALAR': size = 1; break;
case 'VEC2': size = 2; break;
case 'VEC3': size = 3; break;
case 'VEC4': size = 4; break;
case 'MAT2': size = 4; break;
case 'MAT3': size = 9; break;
case 'MAT4': size = 16; break;
}
return size;
}
function getFilter(filter) {
var pcFilter = pc.FILTER_LINEAR;
switch (filter) {
case 9728: pcFilter = pc.FILTER_NEAREST; break;
case 9729: pcFilter = pc.FILTER_LINEAR; break;
case 9984: pcFilter = pc.FILTER_NEAREST_MIPMAP_NEAREST; break;
case 9985: pcFilter = pc.FILTER_LINEAR_MIPMAP_NEAREST; break;
case 9986: pcFilter = pc.FILTER_NEAREST_MIPMAP_LINEAR; break;
case 9987: pcFilter = pc.FILTER_LINEAR_MIPMAP_LINEAR; break;
}
return pcFilter;
}
function getWrap(wrap) {
var pcWrap = pc.ADDRESS_REPEAT;
switch (wrap) {
case 33071: pcWrap = pc.ADDRESS_CLAMP_TO_EDGE; break;
case 33648: pcWrap = pc.ADDRESS_MIRRORED_REPEAT; break;
case 10497: pcWrap = pc.ADDRESS_REPEAT; break;
}
return pcWrap;
}
function isDataURI(uri) {
return /^data:.*,.*$/i.test(uri);
}
function getAccessorData(gltf, accessor, buffers) {
var bufferView = gltf.bufferViews[accessor.bufferView];
var arrayBuffer = buffers[bufferView.buffer];
var accessorByteOffset = accessor.hasOwnProperty('byteOffset') ? accessor.byteOffset : 0;
var bufferViewByteOffset = bufferView.hasOwnProperty('byteOffset') ? bufferView.byteOffset : 0;
var byteOffset = accessorByteOffset + bufferViewByteOffset;
var length = accessor.count * getAccessorTypeSize(accessor.type);
var data = null;
switch (accessor.componentType) {
case 5120: data = new Int8Array(arrayBuffer, byteOffset, length); break;
case 5121: data = new Uint8Array(arrayBuffer, byteOffset, length); break;
case 5122: data = new Int16Array(arrayBuffer, byteOffset, length); break;
case 5123: data = new Uint16Array(arrayBuffer, byteOffset, length); break;
case 5125: data = new Uint32Array(arrayBuffer, byteOffset, length); break;
case 5126: data = new Float32Array(arrayBuffer, byteOffset, length); break;
}
return data;
}
// Specification:
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#animation
function translateAnimation(data, resources) {
var clip = new AnimationClip();
clip.loop = true;
if (data.hasOwnProperty('name'))
clip.name = data.name;
var gltf = resources.gltf;
data.channels.forEach(function (channel) {
var sampler = data.samplers[channel.sampler];
var times = getAccessorData(gltf, gltf.accessors[sampler.input], resources.buffers);
var values = getAccessorData(gltf, gltf.accessors[sampler.output], resources.buffers);
var numCurves = values.length / times.length;
var time, value, inTangent, outTangent;
var target = channel.target;
var path = target.path;
var curve, keyType;
var i, j;
// Animation for the same root, organized in one AnimationComponent
var entity = resources.nodes[target.node];
if (path === 'weights') {
for (i = 0; i < numCurves; i++) {
curve = new AnimationCurve();
keyType = AnimationKeyableType.NUM;
curve.keyableType = keyType;
curve.addTarget("model", path, i);
if (sampler.interpolation === "CUBIC")
curve.type = AnimationCurveType.CUBIC;
else if (sampler.interpolation === "STEP")
curve.type = AnimationCurveType.STEP;
for (j = 0; j < times.length; j++) {
time = times[j];
value = values[numCurves * j + i];
curve.insertKey(keyType, time, value);
}
clip.addCurve(curve);
}
} else {
// translation, rotation or scale
var valuesContainTangents = sampler.interpolation === "CUBICSPLINE";
if (valuesContainTangents)
numCurves /= 3;
switch (Math.round(numCurves)) {
case 1: keyType = AnimationKeyableType.NUM; break;
case 3: keyType = AnimationKeyableType.VEC; break;
case 4: keyType = AnimationKeyableType.QUAT; break;
default:
console.warn("Unexpected amount of curves per keyframe: " + numCurves);
keyType = AnimationKeyableType.NUM;
}
var ensureKeyType = function (expectedKeyType) {
if (keyType !== expectedKeyType) {
console.warn(
'Unexpected key type: ' +
'"' + keyType + '" ' +
'(expected "' + expectedKeyType + '")'
);
keyType = expectedKeyType;
}
};
var targetPath = path;
switch (path) {
case "translation":
ensureKeyType(AnimationKeyableType.VEC);
targetPath = "localPosition";
break;
case "scale":
ensureKeyType(AnimationKeyableType.VEC);
targetPath = "localScale";
break;
case "rotation":
ensureKeyType(AnimationKeyableType.QUAT);
targetPath = "localRotation";
break;
}
curve = new AnimationCurve();
curve.keyableType = keyType;
curve.setTarget(entity, targetPath);
if (sampler.interpolation === "CUBIC")
curve.type = AnimationCurveType.CUBIC;
else if (sampler.interpolation === "STEP")
curve.type = AnimationCurveType.STEP;
else if (sampler.interpolation === "CUBICSPLINE")
curve.type = AnimationCurveType.CUBICSPLINE_GLTF;
// glTF animation keys can be assumed to be serialized in time
// order so no need to use AnimationCurve#insertKey (which does
// extra work to insert a key at the correct index).
var keyable, keyables = [];
if (valuesContainTangents) {
for (i = 0; i < times.length; i++) {
time = times[i];
switch (keyType) {
case AnimationKeyableType.VEC:
inTangent = new pc.Vec3(values[9 * i + 0], values[9 * i + 1], values[9 * i + 2]);
value = new pc.Vec3(values[9 * i + 3], values[9 * i + 4], values[9 * i + 5]);
outTangent = new pc.Vec3(values[9 * i + 6], values[9 * i + 7], values[9 * i + 8]);
break;
case AnimationKeyableType.QUAT:
inTangent = new pc.Quat(values[12 * i + 0], values[12 * i + 1], values[12 * i + 2], values[12 * i + 3]);
value = new pc.Quat(values[12 * i + 4], values[12 * i + 5], values[12 * i + 6], values[12 * i + 7]);
outTangent = new pc.Quat(values[12 * i + 8], values[12 * i + 9], values[12 * i + 10], values[12 * i + 11]);
break;
default:
case AnimationKeyableType.NUM:
inTangent = values[3 * i];
value = values[3 * i + 1];
outTangent = values[3 * i + 2];
}
keyable = new AnimationKeyable(keyType, time, value);
keyable.inTangent = inTangent;
keyable.outTangent = outTangent;
keyables.push(keyable);
}
} else {
for (i = 0; i < times.length; i++) {
time = times[i];
switch (keyType) {
case AnimationKeyableType.VEC:
value = new pc.Vec3(values[3 * i + 0], values[3 * i + 1], values[3 * i + 2]);
break;
case AnimationKeyableType.QUAT:
value = new pc.Quat(values[4 * i + 0], values[4 * i + 1], values[4 * i + 2], values[4 * i + 3]);
break;
default:
case AnimationKeyableType.NUM:
value = values[i];
}
keyable = new AnimationKeyable(keyType, time, value);
keyables.push(keyable);
}
}
curve.animKeys = keyables;
curve.duration = time;
clip.addCurve(curve);
}
});
if (data.hasOwnProperty('extras') && resources.processAnimationExtras) {
resources.processAnimationExtras(clip, data.extras);
}
return clip;
}
// Specification:
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#image
function resampleImage(image) {
var srcW = image.width;
var srcH = image.height;
var dstW = nearestPow2(srcW);
var dstH = nearestPow2(srcH);
var canvas = document.createElement('canvas');
canvas.width = dstW;
canvas.height = dstH;
var context = canvas.getContext('2d');
context.drawImage(image, 0, 0, srcW, srcH, 0, 0, dstW, dstH);
return canvas.toDataURL();
}
function translateImage(data, resources, success) {
var image = new Image();
var loadedBlob = false;
var onLoad = function () {
image.removeEventListener('load', onLoad, false);
var gltf = resources.gltf;
var imageIndex = resources.images.indexOf(image);
gltf.textures.forEach(function (texture, idx) {
if (texture.hasOwnProperty('source')) {
if (texture.source === imageIndex) {
var t = resources.textures[idx];
if ((!isPowerOf2(image.width) || !isPowerOf2(image.height)) &&
((t.addressU === pc.ADDRESS_REPEAT) || (t.addressU === pc.ADDRESS_MIRRORED_REPEAT) ||
(t.addressV === pc.ADDRESS_REPEAT) || (t.addressV === pc.ADDRESS_MIRRORED_REPEAT) ||
(t.minFilter === pc.FILTER_LINEAR_MIPMAP_LINEAR) || (t.minFilter === pc.FILTER_NEAREST_MIPMAP_LINEAR) ||
(t.minFilter === pc.FILTER_LINEAR_MIPMAP_NEAREST) || (t.minFilter === pc.FILTER_NEAREST_MIPMAP_NEAREST))) {
var potImage = new Image();
potImage.addEventListener('load', function () {
t.setSource(potImage);
});
potImage.src = resampleImage(image);
} else {
t.setSource(image);
}
}
}
});
resources.imagesLoaded++;
if (resources.imagesLoaded === gltf.images.length) {
success();
}
if (loadedBlob) {
URL.revokeObjectURL(image.src);
}
};
var onError = function () {
console.error('Could not load image from url ' + image.src);
if (loadedBlob) {
URL.revokeObjectURL(image.src);
}
};
image.addEventListener('load', onLoad, false);
image.addEventListener('error', onError, false);
if (data.hasOwnProperty('uri')) {
if (isDataURI(data.uri)) {
image.src = data.uri;
} else if (resources.processUri) {
resources.processUri(data.uri, function (uri) {
image.crossOrigin = "anonymous";
image.src = uri;
});
} else {
image.crossOrigin = "anonymous";
image.src = resources.basePath + data.uri;
}
}
if (data.hasOwnProperty('bufferView')) {
var gltf = resources.gltf;
var buffers = resources.buffers;
var bufferView = gltf.bufferViews[data.bufferView];
var arrayBuffer = buffers[bufferView.buffer];
var byteOffset = bufferView.hasOwnProperty('byteOffset') ? bufferView.byteOffset : 0;
var imageBuffer = arrayBuffer.slice(byteOffset, byteOffset + bufferView.byteLength);
var blob = new Blob([imageBuffer], { type: data.mimeType });
image.src = URL.createObjectURL(blob);
loadedBlob = true;
}
return image;
}
// Specification:
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#material
var glossChunk = [
"#ifdef MAPFLOAT",
"uniform float material_shininess;",
"#endif",
"",
"#ifdef MAPTEXTURE",
"uniform sampler2D texture_glossMap;",
"#endif",
"",
"void getGlossiness() {",
" dGlossiness = 1.0;",
"",
"#ifdef MAPFLOAT",
" dGlossiness *= material_shininess;",
"#endif",
"",
"#ifdef MAPTEXTURE",
" dGlossiness *= texture2D(texture_glossMap, $UV).$CH;",
"#endif",
"",
"#ifdef MAPVERTEX",
" dGlossiness *= saturate(vVertexColor.$VC);",
"#endif",
"",
" dGlossiness = 1.0 - dGlossiness;",
"",
" dGlossiness += 0.0000001;",
"}"
].join('\n');
var specularChunk = [
"#ifdef MAPCOLOR",
"uniform vec3 material_specular;",
"#endif",
"",
"#ifdef MAPTEXTURE",
"uniform sampler2D texture_specularMap;",
"#endif",
"",
"void getSpecularity() {",
" dSpecularity = vec3(1.0);",
"",
" #ifdef MAPCOLOR",
" dSpecularity *= material_specular;",
" #endif",
"",
" #ifdef MAPTEXTURE",
" vec3 srgb = texture2D(texture_specularMap, $UV).$CH;",
" dSpecularity *= vec3(pow(srgb.r, 2.2), pow(srgb.g, 2.2), pow(srgb.b, 2.2));",
" #endif",
"",
" #ifdef MAPVERTEX",
" dSpecularity *= saturate(vVertexColor.$VC);",
" #endif",
"}"
].join('\n');
function translateMaterial(data, resources) {
var material = new pc.StandardMaterial();
// glTF dooesn't define how to occlude specular
material.occludeSpecular = true;
material.diffuseTint = true;
material.diffuseVertexColor = true;
material.specularTint = true;
material.specularVertexColor = true;
if (data.hasOwnProperty('name')) {
material.name = data.name;
}
if (data.hasOwnProperty('extensions') && data.extensions.hasOwnProperty('KHR_materials_unlit')) {
material.useLighting = false;
}
var color, texture;
if (data.hasOwnProperty('extensions') && data.extensions.hasOwnProperty('KHR_materials_pbrSpecularGlossiness')) {
var specData = data.extensions.KHR_materials_pbrSpecularGlossiness;
if (specData.hasOwnProperty('diffuseFactor')) {
color = specData.diffuseFactor;
// Convert from linear space to sRGB space
material.diffuse.set(Math.pow(color[0], 1 / 2.2), Math.pow(color[1], 1 / 2.2), Math.pow(color[2], 1 / 2.2));
material.opacity = (color[3] != null) ? color[3] : 1;
} else {
material.diffuse.set(1, 1, 1);
material.opacity = 1;
}
if (specData.hasOwnProperty('diffuseTexture')) {
var diffuseTexture = specData.diffuseTexture;
texture = resources.textures[diffuseTexture.index];
material.diffuseMap = texture;
material.diffuseMapChannel = 'rgb';
material.opacityMap = texture;
material.opacityMapChannel = 'a';
if (diffuseTexture.hasOwnProperty('texCoord')) {
material.diffuseMapUv = diffuseTexture.texCoord;
material.opacityMapUv = diffuseTexture.texCoord;
}
if (diffuseTexture.hasOwnProperty('extensions') && diffuseTexture.extensions.hasOwnProperty('KHR_texture_transform')) {
var diffuseTransformData = diffuseTexture.extensions.KHR_texture_transform;
if (diffuseTransformData.hasOwnProperty('scale')) {
material.diffuseMapTiling = new pc.Vec2(diffuseTransformData.scale[0], diffuseTransformData.scale[1]);
material.opacityMapTiling = new pc.Vec2(diffuseTransformData.scale[0], diffuseTransformData.scale[1]);
}
if (diffuseTransformData.hasOwnProperty('offset')) {
material.diffuseMapOffset = new pc.Vec2(diffuseTransformData.offset[0], diffuseTransformData.offset[1]);
material.opacityMapOffset = new pc.Vec2(diffuseTransformData.offset[0], diffuseTransformData.offset[1]);
}
}
}
material.useMetalness = false;
if (specData.hasOwnProperty('specularFactor')) {
color = specData.specularFactor;
// Convert from linear space to sRGB space
material.specular.set(Math.pow(color[0], 1 / 2.2), Math.pow(color[1], 1 / 2.2), Math.pow(color[2], 1 / 2.2));
} else {
material.specular.set(1, 1, 1);
}
if (specData.hasOwnProperty('glossinessFactor')) {
material.shininess = 100 * specData.glossinessFactor;
} else {
material.shininess = 100;
}
if (specData.hasOwnProperty('specularGlossinessTexture')) {
var specularGlossinessTexture = specData.specularGlossinessTexture;
material.specularMap = resources.textures[specularGlossinessTexture.index];
material.specularMapChannel = 'rgb';
material.glossMap = resources.textures[specularGlossinessTexture.index];
material.glossMapChannel = 'a';
if (specularGlossinessTexture.hasOwnProperty('texCoord')) {
material.glossMapUv = specularGlossinessTexture.texCoord;
material.metalnessMapUv = specularGlossinessTexture.texCoord;
}
if (specularGlossinessTexture.hasOwnProperty('extensions') && specularGlossinessTexture.extensions.hasOwnProperty('KHR_texture_transform')) {
var specGlossTransformData = specularGlossinessTexture.extensions.KHR_texture_transform;
if (specGlossTransformData.hasOwnProperty('scale')) {
material.glossMapTiling = new pc.Vec2(specGlossTransformData.scale[0], specGlossTransformData.scale[1]);
material.metalnessMapTiling = new pc.Vec2(specGlossTransformData.scale[0], specGlossTransformData.scale[1]);
}
if (specGlossTransformData.hasOwnProperty('offset')) {
material.glossMapOffset = new pc.Vec2(specGlossTransformData.offset[0], specGlossTransformData.offset[1]);
material.metalnessMapOffset = new pc.Vec2(specGlossTransformData.offset[0], specGlossTransformData.offset[1]);
}
}
}
material.chunks.specularPS = specularChunk;
} else if (data.hasOwnProperty('pbrMetallicRoughness')) {
var pbrData = data.pbrMetallicRoughness;
if (pbrData.hasOwnProperty('baseColorFactor')) {
color = pbrData.baseColorFactor;
// Convert from linear space to sRGB space
material.diffuse.set(Math.pow(color[0], 1 / 2.2), Math.pow(color[1], 1 / 2.2), Math.pow(color[2], 1 / 2.2));
material.opacity = color[3];
} else {
material.diffuse.set(1, 1, 1);
material.opacity = 1;
}
if (pbrData.hasOwnProperty('baseColorTexture')) {
var baseColorTexture = pbrData.baseColorTexture;
texture = resources.textures[baseColorTexture.index];
material.diffuseMap = texture;
material.diffuseMapChannel = 'rgb';
material.opacityMap = texture;
material.opacityMapChannel = 'a';
if (baseColorTexture.hasOwnProperty('texCoord')) {
material.diffuseMapUv = baseColorTexture.texCoord;
material.opacityMapUv = baseColorTexture.texCoord;
}
if (baseColorTexture.hasOwnProperty('extensions') && baseColorTexture.extensions.hasOwnProperty('KHR_texture_transform')) {
var baseColorTransformData = baseColorTexture.extensions.KHR_texture_transform;
if (baseColorTransformData.hasOwnProperty('scale')) {
material.diffuseMapTiling = new pc.Vec2(baseColorTransformData.scale[0], baseColorTransformData.scale[1]);
material.opacityMapTiling = new pc.Vec2(baseColorTransformData.scale[0], baseColorTransformData.scale[1]);
}
if (baseColorTransformData.hasOwnProperty('offset')) {
material.diffuseMapOffset = new pc.Vec2(baseColorTransformData.offset[0], baseColorTransformData.offset[1]);
material.opacityMapOffset = new pc.Vec2(baseColorTransformData.offset[0], baseColorTransformData.offset[1]);
}
}
}
material.useMetalness = true;
if (pbrData.hasOwnProperty('metallicFactor')) {
material.metalness = pbrData.metallicFactor;
} else {
material.metalness = 1;
}
if (pbrData.hasOwnProperty('roughnessFactor')) {
material.shininess = 100 * pbrData.roughnessFactor;
} else {
material.shininess = 100;
}
if (pbrData.hasOwnProperty('metallicRoughnessTexture')) {
var metallicRoughnessTexture = pbrData.metallicRoughnessTexture;
material.metalnessMap = resources.textures[metallicRoughnessTexture.index];
material.metalnessMapChannel = 'b';
material.glossMap = resources.textures[metallicRoughnessTexture.index];
material.glossMapChannel = 'g';
if (metallicRoughnessTexture.hasOwnProperty('texCoord')) {
material.glossMapUv = metallicRoughnessTexture.texCoord;
material.metalnessMapUv = metallicRoughnessTexture.texCoord;
}
if (metallicRoughnessTexture.hasOwnProperty('extensions') && metallicRoughnessTexture.extensions.hasOwnProperty('KHR_texture_transform')) {
var metallicTransformData = metallicRoughnessTexture.extensions.KHR_texture_transform;
if (metallicTransformData.hasOwnProperty('scale')) {
material.glossMapTiling = new pc.Vec2(metallicTransformData.scale[0], metallicTransformData.scale[1]);
material.metalnessMapTiling = new pc.Vec2(metallicTransformData.scale[0], metallicTransformData.scale[1]);
}
if (metallicTransformData.hasOwnProperty('offset')) {
material.glossMapOffset = new pc.Vec2(metallicTransformData.offset[0], metallicTransformData.offset[1]);
material.metalnessMapOffset = new pc.Vec2(metallicTransformData.offset[0], metallicTransformData.offset[1]);
}
}
}
material.chunks.glossPS = glossChunk;
}
if (data.hasOwnProperty('normalTexture')) {
var normalTexture = data.normalTexture;
material.normalMap = resources.textures[normalTexture.index];
if (normalTexture.hasOwnProperty('texCoord')) {
material.normalMapUv = normalTexture.texCoord;
}
if (normalTexture.hasOwnProperty('extensions') && normalTexture.extensions.hasOwnProperty('KHR_texture_transform')) {
var normalTransformData = normalTexture.extensions.KHR_texture_transform;
if (normalTransformData.hasOwnProperty('scale')) {
material.normalMapTiling = new pc.Vec2(normalTransformData.scale[0], normalTransformData.scale[1]);
}
if (normalTransformData.hasOwnProperty('offset')) {
material.normalMapOffset = new pc.Vec2(normalTransformData.offset[0], normalTransformData.offset[1]);
}
}
if (normalTexture.hasOwnProperty('scale')) {
material.bumpiness = normalTexture.scale;
}
}
if (data.hasOwnProperty('occlusionTexture')) {
var occlusionTexture = data.occlusionTexture;
material.aoMap = resources.textures[occlusionTexture.index];
material.aoMapChannel = 'r';
if (occlusionTexture.hasOwnProperty('texCoord')) {
material.aoMapUv = occlusionTexture.texCoord;
}
if (occlusionTexture.hasOwnProperty('extensions') && occlusionTexture.extensions.hasOwnProperty('KHR_texture_transform')) {
var occlusionTransformData = occlusionTexture.extensions.KHR_texture_transform;
if (occlusionTransformData.hasOwnProperty('scale')) {
material.aoMapTiling = new pc.Vec2(occlusionTransformData.scale[0], occlusionTransformData.scale[1]);
}
if (occlusionTransformData.hasOwnProperty('offset')) {
material.aoMapOffset = new pc.Vec2(occlusionTransformData.offset[0], occlusionTransformData.offset[1]);
}
}
// TODO: support 'strength'
}
if (data.hasOwnProperty('emissiveFactor')) {
color = data.emissiveFactor;
// Convert from linear space to sRGB space
material.emissive.set(Math.pow(color[0], 1 / 2.2), Math.pow(color[1], 1 / 2.2), Math.pow(color[2], 1 / 2.2));
material.emissiveTint = true;
} else {
material.emissive.set(0, 0, 0);
material.emissiveTint = false;
}
if (data.hasOwnProperty('emissiveTexture')) {
var emissiveTexture = data.emissiveTexture;
material.emissiveMap = resources.textures[emissiveTexture.index];
if (emissiveTexture.hasOwnProperty('texCoord')) {
material.emissiveMapUv = emissiveTexture.texCoord;
}
if (emissiveTexture.hasOwnProperty('extensions') && emissiveTexture.extensions.hasOwnProperty('KHR_texture_transform')) {
var emissiveTransformData = emissiveTexture.extensions.KHR_texture_transform;
if (emissiveTransformData.hasOwnProperty('scale')) {
material.emissiveMapTiling = new pc.Vec2(emissiveTransformData.scale[0], emissiveTransformData.scale[1]);
}
if (emissiveTransformData.hasOwnProperty('offset')) {
material.emissiveMapOffset = new pc.Vec2(emissiveTransformData.offset[0], emissiveTransformData.offset[1]);
}
}
}
if (data.hasOwnProperty('alphaMode')) {
switch (data.alphaMode) {
case 'MASK':
material.blendType = pc.BLEND_NONE;
if (data.hasOwnProperty('alphaCutoff')) {
material.alphaTest = data.alphaCutoff;
} else {
material.alphaTest = 0.5;
}
break;
case 'BLEND':
material.blendType = pc.BLEND_NORMAL;
break;
default:
case 'OPAQUE':
material.blendType = pc.BLEND_NONE;
break;
}
} else {
material.blendType = pc.BLEND_NONE;
}
if (data.hasOwnProperty('doubleSided')) {
material.twoSidedLighting = data.doubleSided;
material.cull = data.doubleSided ? pc.CULLFACE_NONE : pc.CULLFACE_BACK;
} else {
material.twoSidedLighting = false;
material.cull = pc.CULLFACE_BACK;
}
if (data.hasOwnProperty('extras') && resources.processMaterialExtras) {
resources.processMaterialExtras(material, data.extras);
}
material.update();
return material;
}
// Specification:
// https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#mesh
function translateMesh(data, resources) {
var gltf = resources.gltf;
var meshes = [];
data.primitives.forEach(function (primitive) {
var attributes = primitive.attributes;
var positions = null;
var normals = null;
var tangents = null;
var texCoord0 = null;
var texCoord1 = null;
var colors = null;
var joints = null;
var weights = null;
var indices = null;
var i;
// Start by looking for compressed vertex data for this primitive
if (primitive.hasOwnProperty('extensions')) {
var extensions = primitive.extensions;
if (extensions.hasOwnProperty('KHR_draco_mesh_compression')) {
var extDraco = extensions.KHR_draco_mesh_compression;
var bufferView = gltf.bufferViews[extDraco.bufferView];
var arrayBuffer = resources.buffers[bufferView.buffer];
var byteOffset = bufferView.hasOwnProperty('byteOffset') ? bufferView.byteOffset : 0;
var uint8Buffer = new Int8Array(arrayBuffer, byteOffset, bufferView.byteLength);
var decoderModule = resources.decoderModule;
var buffer = new decoderModule.DecoderBuffer();
buffer.Init(uint8Buffer, uint8Buffer.length);
var decoder = new decoderModule.Decoder();
var geometryType = decoder.GetEncodedGeometryType(buffer);
var outputGeometry, status;
switch (geometryType) {
case decoderModule.INVALID_GEOMETRY_TYPE:
console.error('Invalid geometry type');
break;
case decoderModule.POINT_CLOUD:
outputGeometry = new decoderModule.PointCloud();
status = decoder.DecodeBufferToPointCloud(buffer, outputGeometry);
break;
case decoderModule.TRIANGULAR_MESH:
outputGeometry = new decoderModule.Mesh();
status = decoder.DecodeBufferToMesh(buffer, outputGeometry);
break;
}
if (!status.ok() || outputGeometry.ptr == 0) {
var errorMsg = status.error_msg();
console.error(errorMsg);
}
var numPoints = outputGeometry.num_points();
var numFaces = outputGeometry.num_faces();
if (extDraco.hasOwnProperty('attributes')) {
var extractAttribute = function (uniqueId) {
var attribute = decoder.GetAttributeByUniqueId(outputGeometry, uniqueId);
var attributeData = new decoderModule.DracoFloat32Array();
decoder.GetAttributeFloatForAllPoints(outputGeometry, attribute, attributeData);
var numValues = numPoints * attribute.num_components();
var values = new Float32Array(numValues);
for (i = 0; i < numValues; i++) {
values[i] = attributeData.GetValue(i);
}
decoderModule.destroy(attributeData);
return values;
};
var dracoAttribs = extDraco.attributes;
if (dracoAttribs.hasOwnProperty('POSITION'))
positions = extractAttribute(dracoAttribs.POSITION);
if (dracoAttribs.hasOwnProperty('NORMAL'))
normals = extractAttribute(dracoAttribs.NORMAL);
if (dracoAttribs.hasOwnProperty('TANGENT'))
tangents = extractAttribute(dracoAttribs.TANGENT);
if (dracoAttribs.hasOwnProperty('TEXCOORD_0'))
texCoord0 = extractAttribute(dracoAttribs.TEXCOORD_0);
if (dracoAttribs.hasOwnProperty('TEXCOORD_1'))
texCoord1 = extractAttribute(dracoAttribs.TEXCOORD_1);
if (dracoAttribs.hasOwnProperty('COLOR_0'))
colors = extractAttribute(dracoAttribs.COLOR_0);
if (dracoAttribs.hasOwnProperty('JOINTS_0'))
joints = extractAttribute(dracoAttribs.JOINTS_0);
if (dracoAttribs.hasOwnProperty('WEIGHTS_0'))
weights = extractAttribute(dracoAttribs.WEIGHTS_0);
}
if (geometryType == decoderModule.TRIANGULAR_MESH) {
var face = new decoderModule.DracoInt32Array();
indices = (numPoints > 65535) ? new Uint32Array(numFaces * 3) : new Uint16Array(numFaces * 3);
for (i = 0; i < numFaces; ++i) {
decoder.GetFaceFromMesh(outputGeometry, i, face);
indices[i * 3] = face.GetValue(0);
indices[i * 3 + 1] = face.GetValue(1);
indices[i * 3 + 2] = face.GetValue(2);
}
decoderModule.destroy(face);
}
decoderModule.destroy(outputGeometry);
decoderModule.destroy(decoder);
decoderModule.destroy(buffer);
}
}
// Grab typed arrays for all vertex data
var accessor;
if (attributes.hasOwnProperty('POSITION') && positions === null) {
accessor = gltf.accessors[primitive.attributes.POSITION];
positions = getAccessorData(gltf, accessor, resources.buffers);
}
if (attributes.hasOwnProperty('NORMAL') && normals === null) {
accessor = gltf.accessors[primitive.attributes.NORMAL];
normals = getAccessorData(gltf, accessor, resources.buffers);
}
if (attributes.hasOwnProperty('TANGENT') && tangents === null) {
accessor = gltf.accessors[primitive.attributes.TANGENT];
tangents = getAccessorData(gltf, accessor, resources.buffers);
}
if (attributes.hasOwnProperty('TEXCOORD_0') && texCoord0 === null) {
accessor = gltf.accessors[primitive.attributes.TEXCOORD_0];
texCoord0 = getAccessorData(gltf, accessor, resources.buffers);
}
if (attributes.hasOwnProperty('TEXCOORD_1') && texCoord1 === null) {
accessor = gltf.accessors[primitive.attributes.TEXCOORD_1];
texCoord1 = getAccessorData(gltf, accessor, resources.buffers);
}
if (attributes.hasOwnProperty('COLOR_0') && colors === null) {
accessor = gltf.accessors[primitive.attributes.COLOR_0];
colors = getAccessorData(gltf, accessor, resources.buffers);
}
if (attributes.hasOwnProperty('JOINTS_0') && joints === null) {
accessor = gltf.accessors[primitive.attributes.JOINTS_0];
joints = getAccessorData(gltf, accessor, resources.buffers);
}
if (attributes.hasOwnProperty('WEIGHTS_0') && weights === null) {
accessor = gltf.accessors[primitive.attributes.WEIGHTS_0];
weights = getAccessorData(gltf, accessor, resources.buffers);
}
if (primitive.hasOwnProperty('indices') && indices === null) {
accessor = gltf.accessors[primitive.indices];
indices = getAccessorData(gltf, accessor, resources.buffers);
}
var numVertices = positions.length / 3;
var calculateIndices = function () {
var dummyIndices = new Uint16Array(numVertices);
for (i = 0; i < numVertices; i++) {
dummyIndices[i] = i;
}
return dummyIndices;
};
if (positions !== null && normals === null) {
// pc.calculateNormals needs indices so generate some if none are present
normals = pc.calculateNormals(positions, (indices === null) ? calculateIndices() : indices);
}
var vertexDesc = [];
if (positions) {
vertexDesc.push({ semantic: pc.SEMANTIC_POSITION, components: 3, type: pc.TYPE_FLOAT32 });
}
if (normals) {
vertexDesc.push({ semantic: pc.SEMANTIC_NORMAL, components: 3, type: pc.TYPE_FLOAT32 });
}
if (tangents) {
vertexDesc.push({ semantic: pc.SEMANTIC_TANGENT, components: 4, type: pc.TYPE_FLOAT32 });
}
if (texCoord0) {
vertexDesc.push({ semantic: pc.SEMANTIC_TEXCOORD0, components: 2, type: pc.TYPE_FLOAT32 });
}
if (texCoord1) {
vertexDesc.push({ semantic: pc.SEMANTIC_TEXCOORD1, components: 2, type: pc.TYPE_FLOAT32 });
}
if (colors) {
vertexDesc.push({ semantic: pc.SEMANTIC_COLOR, components: 4, type: pc.TYPE_UINT8, normalize: true });
}
if (joints) {
vertexDesc.push({ semantic: pc.SEMANTIC_BLENDINDICES, components: 4, type: pc.TYPE_UINT8 });
}
if (weights) {
vertexDesc.push({ semantic: pc.SEMANTIC_BLENDWEIGHT, components: 4, type: pc.TYPE_FLOAT32 });
}
var vertexFormat = new pc.VertexFormat(resources.device, vertexDesc);
var vertexBuffer = new pc.VertexBuffer(resources.device, vertexFormat, numVertices, pc.BUFFER_STATIC);
var vertexData = vertexBuffer.lock();
var vertexDataF32 = new Float32Array(vertexData);
var vertexDataU8 = new Uint8Array(vertexData);
var getAttribute = function (semantic) {
var elements = vertexFormat.elements;
for (i = 0; i < elements.length; i++) {
if (elements[i].name === semantic) {
return elements[i];
}
}
return null;
};
var dstIndex, srcIndex;
var attr, dstOffset, dstStride;
if (positions !== null) {
attr = getAttribute(pc.SEMANTIC_POSITION);
dstOffset = attr.offset / 4;
dstStride = attr.stride / 4;
for (i = 0; i < numVertices; i++) {
dstIndex = dstOffset + i * dstStride;
srcIndex = i * 3;
vertexDataF32[dstIndex] = positions[srcIndex];
vertexDataF32[dstIndex + 1] = positions[srcIndex + 1];
vertexDataF32[dstIndex + 2] = positions[srcIndex + 2];
}
}
if (normals !== null) {
attr = getAttribute(pc.SEMANTIC_NORMAL);
dstOffset = attr.offset / 4;
dstStride = attr.stride / 4;
for (i = 0; i < numVertices; i++) {
dstIndex = dstOffset + i * dstStride;
srcIndex = i * 3;
vertexDataF32[dstIndex] = normals[srcIndex];
vertexDataF32[dstIndex + 1] = normals[srcIndex + 1];
vertexDataF32[dstIndex + 2] = normals[srcIndex + 2];
}
}
if (tangents !== null) {
attr = getAttribute(pc.SEMANTIC_TANGENT);
dstOffset = attr.offset / 4;
dstStride = attr.stride / 4;
for (i = 0; i < numVertices; i++) {
dstIndex = dstOffset + i * dstStride;
srcIndex = i * 4;
vertexDataF32[dstIndex] = tangents[srcIndex];
vertexDataF32[dstIndex + 1] = tangents[srcIndex + 1];
vertexDataF32[dstIndex + 2] = tangents[srcIndex + 2];
vertexDataF32[dstIndex + 3] = tangents[srcIndex + 3];
}
}
if (texCoord0 !== null) {
attr = getAttribute(pc.SEMANTIC_TEXCOORD0);
dstOffset = attr.offset / 4;
dstStride = attr.stride / 4;
for (i = 0; i < numVertices; i++) {
dstIndex = dstOffset + i * dstStride;
srcIndex = i * 2;
vertexDataF32[dstIndex] = texCoord0[srcIndex];
vertexDataF32[dstIndex + 1] = texCoord0[srcIndex + 1];
}
}
if (texCoord1 !== null) {
attr = getAttribute(pc.SEMANTIC_TEXCOORD1);
dstOffset = attr.offset / 4;
dstStride = attr.stride / 4;
for (i = 0; i < numVertices; i++) {
dstIndex = dstOffset + i * dstStride;
srcIndex = i * 2;
vertexDataF32[dstIndex] = texCoord1[srcIndex];
vertexDataF32[dstIndex + 1] = texCoord1[srcIndex + 1];
}
}
if (colors !== null) {
attr = getAttribute(pc.SEMANTIC_COLOR);
dstOffset = attr.offset;
dstStride = attr.stride;
accessor = gltf.accessors[primitive.attributes.COLOR_0];
for (i = 0; i < numVertices; i++) {
dstIndex = dstOffset + i * dstStride;
srcIndex = accessor.type === 'VEC4' ? i * 4 : i * 3;
var r = colors[srcIndex];
var g = colors[srcIndex + 1];
var b = colors[srcIndex + 2];
var a = colors[srcIndex + 3];
vertexDataU8[dstIndex] = Math.round(pc.math.clamp(r, 0, 1) * 255);
vertexDataU8[dstIndex + 1] = Math.round(pc.math.clamp(g, 0, 1) * 255);
vertexDataU8[dstIndex + 2] = Math.round(pc.math.clamp(b, 0, 1) * 255);
vertexDataU8[dstIndex + 3] = accessor.type === 'VEC4' ? Math.round(pc.math.clamp(a, 0, 1) * 255) : 255;
}
}
if (joints !== null) {
attr = getAttribute(pc.SEMANTIC_BLENDINDICES);
dstOffset = attr.offset;
dstStride = attr.stride;
for (i = 0; i < numVertices; i++) {
dstIndex = dstOffset + i * dstStride;
srcIndex = i * 4;