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Merge pull request #154 from AnalyticalGraphicsInc/fix-uv-error-1.0

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Remove faces that don't match the same attribute layout (1.0)
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Matthew Amato 2018-09-19 15:33:54 -04:00 committed by GitHub
commit d247acc366
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7 changed files with 166 additions and 82 deletions
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4
CHANGES.md
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@ -1,6 +1,10 @@
Change Log
==========
### 1.3.3 2018-??-??
* Fixed handling of objs with mismatching attribute layouts. [#154](https://github.com/AnalyticalGraphicsInc/obj2gltf/pull/154)
### 1.3.2 2018-06-07
* Fixed greyscale images loading as alpha instead of luminance. [#144](https://github.com/AnalyticalGraphicsInc/obj2gltf/pull/144)

55
lib/createGltf.js
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@ -218,10 +218,14 @@ function createGltf(objData, options) {
var meshes = nodes[i].meshes;
var meshesLength = meshes.length;
for (var j = 0; j < meshesLength; ++j) {
// Reserve the 65535 index for primitive restart
var vertexCount = meshes[j].positions.length / 3;
if (vertexCount > 65534) {
return true;
var primitives = meshes[j].primitives;
var primitivesLength = primitives.length;
for (var k = 0; k < primitivesLength; ++k) {
// Reserve the 65535 index for primitive restart
var vertexCount = primitives[k].positions.length / 3;
if (vertexCount > 65534) {
return true;
}
}
}
}
@ -250,26 +254,6 @@ function createGltf(objData, options) {
var meshId = mesh.name;
gltfNodeMeshes.push(meshId);
var hasPositions = mesh.positions.length > 0;
var hasNormals = mesh.normals.length > 0;
var hasUVs = mesh.uvs.length > 0;
var attributes = {};
if (hasPositions) {
attributes.POSITION = addVertexAttribute(mesh.positions, 3);
}
if (hasNormals) {
attributes.NORMAL = addVertexAttribute(mesh.normals, 3);
}
if (hasUVs) {
attributes.TEXCOORD_0 = addVertexAttribute(mesh.uvs, 2);
}
// Unload resources
mesh.positions = undefined;
mesh.normals = undefined;
mesh.uvs = undefined;
var gltfMeshPrimitives = [];
gltf.meshes[meshId] = {
name : meshId,
@ -281,10 +265,31 @@ function createGltf(objData, options) {
var primitivesLength = primitives.length;
for (var k = 0; k < primitivesLength; ++k) {
var primitive = primitives[k];
var hasPositions = primitive.positions.length > 0;
var hasNormals = primitive.normals.length > 0;
var hasUVs = primitive.uvs.length > 0;
var attributes = {};
if (hasPositions) {
attributes.POSITION = addVertexAttribute(primitive.positions, 3);
}
if (hasNormals) {
attributes.NORMAL = addVertexAttribute(primitive.normals, 3);
}
if (hasUVs) {
attributes.TEXCOORD_0 = addVertexAttribute(primitive.uvs, 2);
}
var indexAccessorId = addIndexArray(primitive.indices, uint32Indices);
primitive.indices = undefined; // Unload resources
var materialId = primitive.material;
// Unload resources
primitive.positions = undefined;
primitive.normals = undefined;
primitive.uvs = undefined;
primitive.indices = undefined;
if (!defined(materialId)) {
// Create a default material if the primitive does not specify one
materialId = 'default';

50
lib/loadObj.js
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@ -38,14 +38,14 @@ function Node() {
function Mesh() {
this.name = undefined;
this.primitives = [];
this.positions = new ArrayStorage(ComponentDatatype.FLOAT);
this.normals = new ArrayStorage(ComponentDatatype.FLOAT);
this.uvs = new ArrayStorage(ComponentDatatype.FLOAT);
}
function Primitive() {
this.material = undefined;
this.indices = new ArrayStorage(ComponentDatatype.UNSIGNED_INT);
this.positions = new ArrayStorage(ComponentDatatype.FLOAT);
this.normals = new ArrayStorage(ComponentDatatype.FLOAT);
this.uvs = new ArrayStorage(ComponentDatatype.FLOAT);
}
// OBJ regex patterns are modified from ThreeJS (https://github.com/mrdoob/three.js/blob/master/examples/js/loaders/OBJLoader.js)
@ -87,7 +87,7 @@ function loadObj(objPath, options) {
// All nodes seen in the obj
var nodes = [];
// Used to build the indices. The vertex cache is unique to each mesh.
// Used to build the indices. The vertex cache is unique to each primitive.
var vertexCache = {};
var vertexCacheLimit = 1000000;
var vertexCacheCount = 0;
@ -123,16 +123,16 @@ function loadObj(objPath, options) {
mesh.name = getName(name);
node.meshes.push(mesh);
addPrimitive();
// Clear the vertex cache for each new mesh
vertexCache = {};
vertexCacheCount = 0;
vertexCount = 0;
}
function addPrimitive() {
primitive = new Primitive();
mesh.primitives.push(primitive);
// Clear the vertex cache for each new primitive
vertexCache = {};
vertexCacheCount = 0;
vertexCount = 0;
}
function useMaterial(name) {
@ -167,9 +167,9 @@ function loadObj(objPath, options) {
var px = positions.get(pi + 0);
var py = positions.get(pi + 1);
var pz = positions.get(pi + 2);
mesh.positions.push(px);
mesh.positions.push(py);
mesh.positions.push(pz);
primitive.positions.push(px);
primitive.positions.push(py);
primitive.positions.push(pz);
}
// Normals
@ -178,9 +178,9 @@ function loadObj(objPath, options) {
var nx = normals.get(ni + 0);
var ny = normals.get(ni + 1);
var nz = normals.get(ni + 2);
mesh.normals.push(nx);
mesh.normals.push(ny);
mesh.normals.push(nz);
primitive.normals.push(nx);
primitive.normals.push(ny);
primitive.normals.push(nz);
}
// UVs
@ -188,8 +188,8 @@ function loadObj(objPath, options) {
var ui = getOffset(u, uvs, 2);
var ux = uvs.get(ui + 0);
var uy = uvs.get(ui + 1);
mesh.uvs.push(ux);
mesh.uvs.push(uy);
primitive.uvs.push(ux);
primitive.uvs.push(uy);
}
}
@ -382,6 +382,16 @@ function loadObj(objPath, options) {
var isWindingCorrect = true;
var faceNormal;
var firstFace = primitive.indices.length === 0;
var faceHasUvs = uvs[0].length > 0;
var faceHasNormals = normals[0].length > 0;
var primitiveHasUvs = primitive.uvs.length > 0;
var primitiveHasNormals = primitive.normals.length > 0;
if (!firstFace && (faceHasUvs !== primitiveHasUvs || faceHasNormals !== primitiveHasNormals)) {
// Discard faces that don't use the same attributes
return;
}
// If normals are defined, find a face normal to use in winding order sanitization.
// If no face normal, we have to assume the winding is correct.
if (normals[0].length > 0) {
@ -614,10 +624,10 @@ function removeEmptyMeshes(meshes) {
return meshes.filter(function(mesh) {
// Remove empty primitives
mesh.primitives = mesh.primitives.filter(function(primitive) {
return primitive.indices.length > 0;
return primitive.indices.length > 0 && primitive.positions.length > 0;
});
// Valid meshes must have at least one primitive and contain positions
return (mesh.primitives.length > 0) && (mesh.positions.length > 0);
// Valid meshes must have at least one primitive
return (mesh.primitives.length > 0);
});
}

12
specs/data/box-mixed-attributes/box-mixed-attributes.mtl Normal file
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@ -0,0 +1,12 @@
# Blender MTL File: 'None'
# Material Count: 1
newmtl Material
Ns 96.078431
Ka 0.100000 0.000000 0.000000
Kd 0.640000 0.640000 0.640000
Ks 0.500000 0.500000 0.500000
Ke 0.000000 0.000000 0.100000
Ni 1.000000
d 1.000000
illum 2

46
specs/data/box-mixed-attributes/box-mixed-attributes.obj Normal file
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@ -0,0 +1,46 @@
# Blender v2.78 (sub 0) OBJ File: ''
# www.blender.org
mtllib box-mixed-attributes.mtl
o Cube
v -1.000000 -1.000000 1.000000
v -1.000000 1.000000 1.000000
v -1.000000 -1.000000 -1.000000
v -1.000000 1.000000 -1.000000
v 1.000000 -1.000000 1.000000
v 1.000000 1.000000 1.000000
v 1.000000 -1.000000 -1.000000
v 1.000000 1.000000 -1.000000
vt 0.0000 0.0000
vt 1.0000 0.0000
vt 1.0000 1.0000
vt 0.0000 1.0000
vt 0.0000 0.0000
vt 1.0000 0.0000
vt 1.0000 1.0000
vt 0.0000 1.0000
vt 0.0000 0.0000
vt 1.0000 0.0000
vt 1.0000 1.0000
vt 0.0000 1.0000
vt 0.0000 0.0000
vt 1.0000 0.0000
vt 1.0000 1.0000
vt 0.0000 1.0000
vt 1.0000 0.0000
vt 1.0000 1.0000
vt 0.0000 0.0000
vt 0.0000 1.0000
vn -1.0000 0.0000 0.0000
vn 0.0000 0.0000 -1.0000
vn 1.0000 0.0000 0.0000
vn 0.0000 0.0000 1.0000
vn 0.0000 -1.0000 0.0000
vn 0.0000 1.0000 0.0000
usemtl Material
s off
f 1/1/1 2/2/1 4/3/1 3/4/1
f 3 4 8 7
f 7/9/3 8/10/3 6/11/3 5/12/3
f 5/13/4 6/14/4 2/15/4 1/16/4
f 3//5 7//5 5//5 1//5
f 8/19 4/6 2/15 6/20

36
specs/lib/createGltfSpec.js
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@ -206,7 +206,7 @@ describe('createGltf', function() {
});
it('sets constant material when there are no normals', function() {
boxObjData.nodes[0].meshes[0].normals.length = 0;
boxObjData.nodes[0].meshes[0].primitives[0].normals.length = 0;
var material = new Material();
material.diffuseTexture = diffuseTextureUrl;
@ -255,7 +255,7 @@ describe('createGltf', function() {
it('handles material used with and without normals (1)', function() {
// Two meshes - one with normals, and one without
boxObjData.nodes.push(duplicateBoxObjData.nodes[0]);
boxObjData.nodes[1].meshes[0].normals.length = 0;
boxObjData.nodes[1].meshes[0].primitives[0].normals.length = 0;
var gltf = createGltf(boxObjData, defaultOptions);
var kmc1 = gltf.materials.Material.extensions.KHR_materials_common;
@ -268,7 +268,7 @@ describe('createGltf', function() {
it('handles material used with and without normals (2)', function() {
// Now test in a different order
boxObjData.nodes.push(duplicateBoxObjData.nodes[0]);
boxObjData.nodes[0].meshes[0].normals.length = 0;
boxObjData.nodes[0].meshes[0].primitives[0].normals.length = 0;
var gltf = createGltf(boxObjData, defaultOptions);
var kmc1 = gltf.materials.Material.extensions.KHR_materials_common;
@ -279,7 +279,7 @@ describe('createGltf', function() {
});
it('runs without normals', function() {
boxObjData.nodes[0].meshes[0].normals.length = 0;
boxObjData.nodes[0].meshes[0].primitives[0].normals.length = 0;
var gltf = createGltf(boxObjData, defaultOptions);
var attributes = gltf.meshes[Object.keys(gltf.meshes)[0]].primitives[0].attributes;
@ -289,7 +289,7 @@ describe('createGltf', function() {
});
it('runs without uvs', function() {
boxObjData.nodes[0].meshes[0].uvs.length = 0;
boxObjData.nodes[0].meshes[0].primitives[0].uvs.length = 0;
var gltf = createGltf(boxObjData, defaultOptions);
var attributes = gltf.meshes[Object.keys(gltf.meshes)[0]].primitives[0].attributes;
@ -299,8 +299,8 @@ describe('createGltf', function() {
});
it('runs without uvs and normals', function() {
boxObjData.nodes[0].meshes[0].normals.length = 0;
boxObjData.nodes[0].meshes[0].uvs.length = 0;
boxObjData.nodes[0].meshes[0].primitives[0].normals.length = 0;
boxObjData.nodes[0].meshes[0].primitives[0].uvs.length = 0;
var gltf = createGltf(boxObjData, defaultOptions);
var attributes = gltf.meshes[Object.keys(gltf.meshes)[0]].primitives[0].attributes;
@ -310,11 +310,11 @@ describe('createGltf', function() {
});
function expandObjData(objData, duplicatesLength) {
var mesh = objData.nodes[0].meshes[0];
var indices = mesh.primitives[0].indices;
var positions = mesh.positions;
var normals = mesh.normals;
var uvs = mesh.uvs;
var primitive = objData.nodes[0].meshes[0].primitives[0];
var indices = primitive.indices;
var positions = primitive.positions;
var normals = primitive.normals;
var uvs = primitive.uvs;
var indicesLength = indices.length;
var vertexCount = positions.length / 3;
@ -338,18 +338,18 @@ describe('createGltf', function() {
it('detects need to use uint32 indices', function() {
expandObjData(boxObjData, 2731); // Right above 65536 limit
var mesh = boxObjData.nodes[0].meshes[0];
var indicesLength = mesh.primitives[0].indices.length;
var vertexCount = mesh.positions.length / 3;
var primitive = boxObjData.nodes[0].meshes[0].primitives[0];
var indicesLength = primitive.indices.length;
var vertexCount = primitive.positions.length / 3;
var gltf = createGltf(boxObjData, defaultOptions);
var primitive = gltf.meshes[Object.keys(gltf.meshes)[0]].primitives[0];
var indicesAccessor = gltf.accessors[primitive.indices];
var gltfPrimitive = gltf.meshes[Object.keys(gltf.meshes)[0]].primitives[0];
var indicesAccessor = gltf.accessors[gltfPrimitive.indices];
expect(indicesAccessor.count).toBe(indicesLength);
expect(indicesAccessor.max[0]).toBe(vertexCount - 1);
expect(indicesAccessor.componentType).toBe(WebGLConstants.UNSIGNED_INT);
var positionAccessor = gltf.accessors[primitive.attributes.POSITION];
var positionAccessor = gltf.accessors[gltfPrimitive.attributes.POSITION];
expect(positionAccessor.count).toBe(vertexCount);
});

45
specs/lib/loadObjSpec.js
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@ -32,6 +32,7 @@ var objMissingTextureUrl = 'specs/data/box-missing-texture/box-missing-texture.o
var objSubdirectoriesUrl = 'specs/data/box-subdirectories/box-textured.obj';
var objWindowsPathsUrl = 'specs/data/box-windows-paths/box-windows-paths.obj';
var objComplexMaterialUrl = 'specs/data/box-complex-material/box-complex-material.obj';
var objMixedAttributesUrl = 'specs/data/box-mixed-attributes/box-mixed-attributes.obj';
var objInvalidContentsUrl = 'specs/data/box/box.mtl';
var objInvalidUrl = 'invalid.obj';
@ -91,9 +92,9 @@ describe('loadObj', function() {
expect(node.name).toBe('Cube');
expect(mesh.name).toBe('Cube-Mesh');
expect(mesh.positions.length / 3).toBe(24);
expect(mesh.normals.length / 3).toBe(24);
expect(mesh.uvs.length / 2).toBe(24);
expect(primitive.positions.length / 3).toBe(24);
expect(primitive.normals.length / 3).toBe(24);
expect(primitive.uvs.length / 2).toBe(24);
expect(primitive.indices.length).toBe(36);
expect(primitive.material).toBe('Material');
}), done).toResolve();
@ -102,20 +103,20 @@ describe('loadObj', function() {
it('loads obj with normals', function(done) {
expect(loadObj(objNormalsUrl, defaultOptions)
.then(function(data) {
var mesh = getMeshes(data)[0];
expect(mesh.positions.length / 3).toBe(24);
expect(mesh.normals.length / 3).toBe(24);
expect(mesh.uvs.length / 2).toBe(0);
var primitive = getPrimitives(data)[0];
expect(primitive.positions.length / 3).toBe(24);
expect(primitive.normals.length / 3).toBe(24);
expect(primitive.uvs.length / 2).toBe(0);
}), done).toResolve();
});
it('loads obj with uvs', function(done) {
expect(loadObj(objUvsUrl, defaultOptions)
.then(function(data) {
var mesh = getMeshes(data)[0];
expect(mesh.positions.length / 3).toBe(20);
expect(mesh.normals.length / 3).toBe(0);
expect(mesh.uvs.length / 2).toBe(20);
var primitive = getPrimitives(data)[0];
expect(primitive.positions.length / 3).toBe(20);
expect(primitive.normals.length / 3).toBe(0);
expect(primitive.uvs.length / 2).toBe(20);
}), done).toResolve();
});
@ -125,8 +126,8 @@ describe('loadObj', function() {
loadObj(objNegativeIndicesUrl, defaultOptions)
])
.then(function(results) {
var positionsReference = getMeshes(results[0])[0].positions.toFloatBuffer();
var positions = getMeshes(results[1])[0].positions.toFloatBuffer();
var positionsReference = getPrimitives(results[0])[0].positions.toFloatBuffer();
var positions = getPrimitives(results[1])[0].positions.toFloatBuffer();
expect(positions).toEqual(positionsReference);
}), done).toResolve();
});
@ -134,9 +135,8 @@ describe('loadObj', function() {
it('loads obj with triangle faces', function(done) {
expect(loadObj(objTrianglesUrl, defaultOptions)
.then(function(data) {
var mesh = getMeshes(data)[0];
var primitive = getPrimitives(data)[0];
expect(mesh.positions.length / 3).toBe(24);
expect(primitive.positions.length / 3).toBe(24);
expect(primitive.indices.length).toBe(36);
}), done).toResolve();
});
@ -201,9 +201,8 @@ describe('loadObj', function() {
it('loads obj with concave face containing 5 vertices', function(done) {
expect(loadObj(objConcaveUrl, defaultOptions)
.then(function(data) {
var mesh = getMeshes(data)[0];
var primitive = getPrimitives(data)[0];
expect(mesh.positions.length / 3).toBe(30);
expect(primitive.positions.length / 3).toBe(30);
expect(primitive.indices.length).toBe(48);
}), done).toResolve();
});
@ -365,12 +364,12 @@ describe('loadObj', function() {
});
function getFirstPosition(data) {
var positions = data.nodes[0].meshes[0].positions;
var positions = data.nodes[0].meshes[0].primitives[0].positions;
return new Cartesian3(positions.get(0), positions.get(1), positions.get(2));
}
function getFirstNormal(data) {
var normals = data.nodes[0].meshes[0].normals;
var normals = data.nodes[0].meshes[0].primitives[0].normals;
return new Cartesian3(normals.get(0), normals.get(1), normals.get(2));
}
@ -411,6 +410,14 @@ describe('loadObj', function() {
}), done).toResolve();
});
it('discards faces that don\'t use the same attributes as other faces in the primitive', function(done) {
expect(loadObj(objMixedAttributesUrl, defaultOptions)
.then(function(data) {
var primitive = getPrimitives(data)[0];
expect(primitive.indices.length).toBe(18); // 3 faces removed
}), done).toResolve();
});
it('throws when file has invalid contents', function(done) {
expect(loadObj(objInvalidContentsUrl, defaultOptions), done).toRejectWith(RuntimeError);
});