public static ExportResult Export(Mesh mesh)
{
ExportResult result = new ExportResult();
result.name = mesh.name;
result.primitives = new List <GLTFPrimitive>();
for (int i = 0; i < mesh.subMeshCount; i++)
{
GLTFPrimitive primitive = new GLTFPrimitive();
result.primitives.Add(primitive);
}
return(result);
}
public MeshData(GLTFMesh gltfMesh, GLTFAccessor.ImportResult[] accessors, GLTFBufferView.ImportResult[] bufferViews)
{
name = gltfMesh.name;
if (gltfMesh.primitives.Count == 0)
{
Debug.LogWarning("0 primitives in mesh");
}
else
{
for (int i = 0; i < gltfMesh.primitives.Count; i++)
{
GLTFPrimitive primitive = gltfMesh.primitives[i];
// Load draco mesh
if (primitive.extensions != null && primitive.extensions.KHR_draco_mesh_compression != null)
{
GLTFPrimitive.DracoMeshCompression draco = primitive.extensions.KHR_draco_mesh_compression;
GLTFBufferView.ImportResult bufferView = bufferViews[draco.bufferView];
GLTFUtilityDracoLoader loader = new GLTFUtilityDracoLoader();
byte[] buffer = new byte[bufferView.byteLength];
bufferView.stream.Seek(bufferView.byteOffset, System.IO.SeekOrigin.Begin);
bufferView.stream.Read(buffer, 0, bufferView.byteLength);
GLTFUtilityDracoLoader.MeshAttributes attribs = new GLTFUtilityDracoLoader.MeshAttributes(
primitive.extensions.KHR_draco_mesh_compression.attributes.POSITION ?? -1,
primitive.extensions.KHR_draco_mesh_compression.attributes.NORMAL ?? -1,
primitive.extensions.KHR_draco_mesh_compression.attributes.TEXCOORD_0 ?? -1,
primitive.extensions.KHR_draco_mesh_compression.attributes.JOINTS_0 ?? -1,
primitive.extensions.KHR_draco_mesh_compression.attributes.WEIGHTS_0 ?? -1,
primitive.extensions.KHR_draco_mesh_compression.attributes.COLOR_0 ?? -1
);
//Mesh mesh = loader.LoadMesh(buffer, attribs);
GLTFUtilityDracoLoader.AsyncMesh asyncMesh = loader.LoadMesh(buffer, attribs);
if (asyncMesh == null)
{
Debug.LogWarning("Draco mesh couldn't be loaded");
}
submeshTrisMode.Add(primitive.mode);
// Tris
int vertCount = verts.Count();
submeshTris.Add(asyncMesh.tris.Reverse().Select(x => x + vertCount).ToList());
verts.AddRange(asyncMesh.verts.Select(x => new Vector3(-x.x, x.y, x.z)));
if (asyncMesh.norms != null)
{
normals.AddRange(asyncMesh.norms.Select(v => { v.x = -v.x; return(v); }));
}
//tangents.AddRange(asyncMesh.tangents.Select(v => { v.y = -v.y; v.z = -v.z; return v; }));
// Weights
if (asyncMesh.boneWeights != null)
{
if (weights == null)
{
weights = new List <BoneWeight>();
}
weights.AddRange(asyncMesh.boneWeights);
}
// BlendShapes not supported yet
/* for (int k = 0; k < mesh.blendShapeCount; k++) {
* int frameCount = mesh.GetBlendShapeFrameCount(k);
* BlendShape blendShape = new BlendShape();
* blendShape.pos = new Vector3[frameCount];
* blendShape.norm = new Vector3[frameCount];
* blendShape.tan = new Vector3[frameCount];
* for (int o = 0; o < frameCount; o++) {
* mesh.GetBlendShapeFrameVertices(k, o, blendShape.pos, blendShape.norm, blendShape.tan);
* }
* blendShapes.Add(blendShape);
* } */
// UVs
if (asyncMesh.uv != null)
{
if (uv1 == null)
{
uv1 = new List <Vector2>();
}
uv1.AddRange(asyncMesh.uv.Select(x => new Vector2(x.x, -x.y)));
}
}
// Load normal mesh
else
{
int vertStartIndex = verts.Count;
submeshVertexStart.Add(vertStartIndex);
// Verts - (X points left in GLTF)
if (primitive.attributes.POSITION.HasValue)
{
IEnumerable <Vector3> newVerts = accessors[primitive.attributes.POSITION.Value].ReadVec3(true).Select(v => { v.x = -v.x; return(v); });
verts.AddRange(newVerts);
}
int vertCount = verts.Count;
// Tris - (Invert all triangles. Instead of flipping each triangle, just flip the entire array. Much easier)
if (primitive.indices.HasValue)
{
submeshTris.Add(new List <int>(accessors[primitive.indices.Value].ReadInt().Reverse().Select(x => x + vertStartIndex)));
submeshTrisMode.Add(primitive.mode);
}
/// Normals - (X points left in GLTF)
if (primitive.attributes.NORMAL.HasValue)
{
normals.AddRange(accessors[primitive.attributes.NORMAL.Value].ReadVec3(true).Select(v => { v.x = -v.x; return(v); }));
}
// Tangents - (X points left in GLTF)
if (primitive.attributes.TANGENT.HasValue)
{
tangents.AddRange(accessors[primitive.attributes.TANGENT.Value].ReadVec4(true).Select(v => { v.y = -v.y; v.z = -v.z; return(v); }));
}
// Vertex colors
if (primitive.attributes.COLOR_0.HasValue)
{
colors.AddRange(accessors[primitive.attributes.COLOR_0.Value].ReadColor());
}
// Weights
if (primitive.attributes.WEIGHTS_0.HasValue && primitive.attributes.JOINTS_0.HasValue)
{
Vector4[] weights0 = accessors[primitive.attributes.WEIGHTS_0.Value].ReadVec4(true);
Vector4[] joints0 = accessors[primitive.attributes.JOINTS_0.Value].ReadVec4();
if (joints0.Length == weights0.Length)
{
BoneWeight[] boneWeights = new BoneWeight[weights0.Length];
for (int k = 0; k < boneWeights.Length; k++)
{
NormalizeWeights(ref weights0[k]);
boneWeights[k].weight0 = weights0[k].x;
boneWeights[k].weight1 = weights0[k].y;
boneWeights[k].weight2 = weights0[k].z;
boneWeights[k].weight3 = weights0[k].w;
boneWeights[k].boneIndex0 = Mathf.RoundToInt(joints0[k].x);
boneWeights[k].boneIndex1 = Mathf.RoundToInt(joints0[k].y);
boneWeights[k].boneIndex2 = Mathf.RoundToInt(joints0[k].z);
boneWeights[k].boneIndex3 = Mathf.RoundToInt(joints0[k].w);
}
if (weights == null)
{
weights = new List <BoneWeight>(new BoneWeight[vertCount - boneWeights.Length]);
}
weights.AddRange(boneWeights);
}
else
{
Debug.LogWarning("WEIGHTS_0 and JOINTS_0 not same length. Skipped");
}
}
else
{
if (weights != null)
{
weights.AddRange(new BoneWeight[vertCount - weights.Count]);
}
}
// UVs
ReadUVs(ref uv1, accessors, primitive.attributes.TEXCOORD_0, vertCount);
ReadUVs(ref uv2, accessors, primitive.attributes.TEXCOORD_1, vertCount);
ReadUVs(ref uv3, accessors, primitive.attributes.TEXCOORD_2, vertCount);
ReadUVs(ref uv4, accessors, primitive.attributes.TEXCOORD_3, vertCount);
ReadUVs(ref uv5, accessors, primitive.attributes.TEXCOORD_4, vertCount);
ReadUVs(ref uv6, accessors, primitive.attributes.TEXCOORD_5, vertCount);
ReadUVs(ref uv7, accessors, primitive.attributes.TEXCOORD_6, vertCount);
ReadUVs(ref uv8, accessors, primitive.attributes.TEXCOORD_7, vertCount);
}
}
bool hasTargetNames = gltfMesh.extras != null && gltfMesh.extras.targetNames != null;
if (hasTargetNames)
{
if (gltfMesh.primitives.All(x => x.targets.Count != gltfMesh.extras.targetNames.Length))
{
Debug.LogWarning("Morph target names found in mesh " + name + " but array length does not match primitive morph target array length");
hasTargetNames = false;
}
}
// Read blend shapes after knowing final vertex count
int finalVertCount = verts.Count;
for (int i = 0; i < gltfMesh.primitives.Count; i++)
{
GLTFPrimitive primitive = gltfMesh.primitives[i];
if (primitive.targets != null)
{
for (int k = 0; k < primitive.targets.Count; k++)
{
BlendShape blendShape = new BlendShape();
blendShape.pos = GetMorphWeights(primitive.targets[k].POSITION, submeshVertexStart[i], finalVertCount, accessors);
blendShape.norm = GetMorphWeights(primitive.targets[k].NORMAL, submeshVertexStart[i], finalVertCount, accessors);
blendShape.tan = GetMorphWeights(primitive.targets[k].TANGENT, submeshVertexStart[i], finalVertCount, accessors);
if (hasTargetNames)
{
blendShape.name = gltfMesh.extras.targetNames[k];
}
else
{
blendShape.name = "morph-" + blendShapes.Count;
}
blendShapes.Add(blendShape);
}
}
}
}
}