// multiple submMesh is not sharing a VertexBuffer.
// each subMesh use a independent VertexBuffer.
private static MeshContext _ImportMeshIndependentVertexBuffer(ImporterContext ctx, glTFMesh gltfMesh)
{
//Debug.LogWarning("_ImportMeshIndependentVertexBuffer");
var targets = gltfMesh.primitives[0].targets;
for (int i = 1; i < gltfMesh.primitives.Count; ++i)
{
if (!gltfMesh.primitives[i].targets.SequenceEqual(targets))
{
throw new NotImplementedException(string.Format("different targets: {0} with {1}",
gltfMesh.primitives[i],
targets));
}
}
var positions = new List <Vector3>();
var normals = new List <Vector3>();
var tangents = new List <Vector4>();
var uv = new List <Vector2>();
var colors = new List <Color>();
var meshContext = new MeshContext();
foreach (var prim in gltfMesh.primitives)
{
var indexOffset = positions.Count;
var indexBuffer = prim.indices;
var positionCount = positions.Count;
positions.AddRange(ctx.GLTF.GetArrayFromAccessor <Vector3>(prim.attributes.POSITION).Select(x => x.ReverseZ()));
positionCount = positions.Count - positionCount;
// normal
if (prim.attributes.NORMAL != -1)
{
normals.AddRange(ctx.GLTF.GetArrayFromAccessor <Vector3>(prim.attributes.NORMAL).Select(x => x.ReverseZ()));
}
if (prim.attributes.TANGENT != -1)
{
tangents.AddRange(ctx.GLTF.GetArrayFromAccessor <Vector4>(prim.attributes.TANGENT).Select(x => x.ReverseZ()));
}
// uv
if (prim.attributes.TEXCOORD_0 != -1)
{
if (ctx.IsGeneratedUniGLTFAndOlder(1, 16))
{
#pragma warning disable 0612
// backward compatibility
uv.AddRange(ctx.GLTF.GetArrayFromAccessor <Vector2>(prim.attributes.TEXCOORD_0).Select(x => x.ReverseY()));
#pragma warning restore 0612
}
else
{
uv.AddRange(ctx.GLTF.GetArrayFromAccessor <Vector2>(prim.attributes.TEXCOORD_0).Select(x => x.ReverseUV()));
}
}
else
{
// for inconsistent attributes in primitives
uv.AddRange(new Vector2[positionCount]);
}
// color
if (prim.attributes.COLOR_0 != -1)
{
colors.AddRange(ctx.GLTF.GetArrayFromAccessor <Color>(prim.attributes.COLOR_0));
}
// skin
if (prim.attributes.JOINTS_0 != -1 && prim.attributes.WEIGHTS_0 != -1)
{
var joints0 = ctx.GLTF.GetArrayFromAccessor <UShort4>(prim.attributes.JOINTS_0); // uint4
var weights0 = ctx.GLTF.GetArrayFromAccessor <Float4>(prim.attributes.WEIGHTS_0).Select(x => x.One()).ToArray();
for (int j = 0; j < joints0.Length; ++j)
{
var bw = new BoneWeight();
bw.boneIndex0 = joints0[j].x;
bw.weight0 = weights0[j].x;
bw.boneIndex1 = joints0[j].y;
bw.weight1 = weights0[j].y;
bw.boneIndex2 = joints0[j].z;
bw.weight2 = weights0[j].z;
bw.boneIndex3 = joints0[j].w;
bw.weight3 = weights0[j].w;
meshContext.boneWeights.Add(bw);
}
}
// blendshape
if (prim.targets != null && prim.targets.Count > 0)
{
for (int i = 0; i < prim.targets.Count; ++i)
{
//var name = string.Format("target{0}", i++);
var primTarget = prim.targets[i];
var blendShape = new BlendShape(!string.IsNullOrEmpty(prim.extras.targetNames[i])
? prim.extras.targetNames[i]
: i.ToString())
;
if (primTarget.POSITION != -1)
{
blendShape.Positions.AddRange(
ctx.GLTF.GetArrayFromAccessor <Vector3>(primTarget.POSITION).Select(x => x.ReverseZ()).ToArray());
}
if (primTarget.NORMAL != -1)
{
blendShape.Normals.AddRange(
ctx.GLTF.GetArrayFromAccessor <Vector3>(primTarget.NORMAL).Select(x => x.ReverseZ()).ToArray());
}
if (primTarget.TANGENT != -1)
{
blendShape.Tangents.AddRange(
ctx.GLTF.GetArrayFromAccessor <Vector3>(primTarget.TANGENT).Select(x => x.ReverseZ()).ToArray());
}
meshContext.blendShapes.Add(blendShape);
}
}
var indices =
(indexBuffer >= 0)
? ctx.GLTF.GetIndices(indexBuffer)
: TriangleUtil.FlipTriangle(Enumerable.Range(0, meshContext.positions.Length)).ToArray() // without index array
;
for (int i = 0; i < indices.Length; ++i)
{
indices[i] += indexOffset;
}
meshContext.subMeshes.Add(indices);
// material
meshContext.materialIndices.Add(prim.material);
}
meshContext.positions = positions.ToArray();
meshContext.normals = normals.ToArray();
meshContext.tangents = tangents.ToArray();
meshContext.uv = uv.ToArray();
return(meshContext);
}
// multiple submesh sharing same VertexBuffer
private static MeshContext _ImportMeshSharingVertexBuffer(ImporterContext ctx, glTFMesh gltfMesh)
{
var context = new MeshContext();
{
var prim = gltfMesh.primitives.First();
context.positions = ctx.GLTF.GetArrayFromAccessor <Vector3>(prim.attributes.POSITION).SelectInplace(x => x.ReverseZ());
// normal
if (prim.attributes.NORMAL != -1)
{
context.normals = ctx.GLTF.GetArrayFromAccessor <Vector3>(prim.attributes.NORMAL).SelectInplace(x => x.ReverseZ());
}
// tangent
if (prim.attributes.TANGENT != -1)
{
context.tangents = ctx.GLTF.GetArrayFromAccessor <Vector4>(prim.attributes.TANGENT).SelectInplace(x => x.ReverseZ());
}
// uv
if (prim.attributes.TEXCOORD_0 != -1)
{
if (ctx.IsGeneratedUniGLTFAndOlder(1, 16))
{
#pragma warning disable 0612
// backward compatibility
context.uv = ctx.GLTF.GetArrayFromAccessor <Vector2>(prim.attributes.TEXCOORD_0).SelectInplace(x => x.ReverseY());
#pragma warning restore 0612
}
else
{
context.uv = ctx.GLTF.GetArrayFromAccessor <Vector2>(prim.attributes.TEXCOORD_0).SelectInplace(x => x.ReverseUV());
}
}
else
{
// for inconsistent attributes in primitives
context.uv = new Vector2[context.positions.Length];
}
// color
if (prim.attributes.COLOR_0 != -1)
{
if (ctx.GLTF.accessors[prim.attributes.COLOR_0].TypeCount == 3)
{
var vec3Color = ctx.GLTF.GetArrayFromAccessor <Vector3>(prim.attributes.COLOR_0);
context.colors = new Color[vec3Color.Length];
for (int i = 0; i < vec3Color.Length; i++)
{
Vector3 color = vec3Color[i];
context.colors[i] = new Color(color.x, color.y, color.z);
}
}
else if (ctx.GLTF.accessors[prim.attributes.COLOR_0].TypeCount == 4)
{
context.colors = ctx.GLTF.GetArrayFromAccessor <Color>(prim.attributes.COLOR_0);
}
else
{
throw new NotImplementedException(string.Format("unknown color type {0}", ctx.GLTF.accessors[prim.attributes.COLOR_0].type));
}
}
// skin
if (prim.attributes.JOINTS_0 != -1 && prim.attributes.WEIGHTS_0 != -1)
{
var joints0 = ctx.GLTF.GetArrayFromAccessor <UShort4>(prim.attributes.JOINTS_0); // uint4
var weights0 = ctx.GLTF.GetArrayFromAccessor <Float4>(prim.attributes.WEIGHTS_0);
for (int i = 0; i < weights0.Length; ++i)
{
weights0[i] = weights0[i].One();
}
for (int j = 0; j < joints0.Length; ++j)
{
var bw = new BoneWeight();
bw.boneIndex0 = joints0[j].x;
bw.weight0 = weights0[j].x;
bw.boneIndex1 = joints0[j].y;
bw.weight1 = weights0[j].y;
bw.boneIndex2 = joints0[j].z;
bw.weight2 = weights0[j].z;
bw.boneIndex3 = joints0[j].w;
bw.weight3 = weights0[j].w;
context.boneWeights.Add(bw);
}
}
// blendshape
if (prim.targets != null && prim.targets.Count > 0)
{
context.blendShapes.AddRange(prim.targets.Select((x, i) => new BlendShape(
i < prim.extras.targetNames.Count && !string.IsNullOrEmpty(prim.extras.targetNames[i])
? prim.extras.targetNames[i]
: i.ToString())));
for (int i = 0; i < prim.targets.Count; ++i)
{
//var name = string.Format("target{0}", i++);
var primTarget = prim.targets[i];
var blendShape = context.blendShapes[i];
if (primTarget.POSITION != -1)
{
blendShape.Positions.Assign(
ctx.GLTF.GetArrayFromAccessor <Vector3>(primTarget.POSITION), x => x.ReverseZ());
}
if (primTarget.NORMAL != -1)
{
blendShape.Normals.Assign(
ctx.GLTF.GetArrayFromAccessor <Vector3>(primTarget.NORMAL), x => x.ReverseZ());
}
if (primTarget.TANGENT != -1)
{
blendShape.Tangents.Assign(
ctx.GLTF.GetArrayFromAccessor <Vector3>(primTarget.TANGENT), x => x.ReverseZ());
}
}
}
}
foreach (var prim in gltfMesh.primitives)
{
if (prim.indices == -1)
{
context.subMeshes.Add(TriangleUtil.FlipTriangle(Enumerable.Range(0, context.positions.Length)).ToArray());
}
else
{
var indices = ctx.GLTF.GetIndices(prim.indices);
context.subMeshes.Add(indices);
}
// material
context.materialIndices.Add(prim.material);
}
return(context);
}
static glTFMesh ExportPrimitives(glTF gltf, int bufferIndex,
string rendererName,
Mesh mesh, Material[] materials,
List <Material> unityMaterials)
{
var positions = mesh.vertices.Select(y => y.ReverseZ()).ToArray();
var positionAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, positions, glBufferTarget.ARRAY_BUFFER);
gltf.accessors[positionAccessorIndex].min = positions.Aggregate(positions[0], (a, b) => new Vector3(Mathf.Min(a.x, b.x), Math.Min(a.y, b.y), Mathf.Min(a.z, b.z))).ToArray();
gltf.accessors[positionAccessorIndex].max = positions.Aggregate(positions[0], (a, b) => new Vector3(Mathf.Max(a.x, b.x), Math.Max(a.y, b.y), Mathf.Max(a.z, b.z))).ToArray();
var normalAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.normals.Select(y => y.normalized.ReverseZ()).ToArray(), glBufferTarget.ARRAY_BUFFER);
#if GLTF_EXPORT_TANGENTS
var tangentAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.tangents.Select(y => y.ReverseZ()).ToArray(), glBufferTarget.ARRAY_BUFFER);
#endif
var uvAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.uv.Select(y => y.ReverseUV()).ToArray(), glBufferTarget.ARRAY_BUFFER);
var colorAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, mesh.colors, glBufferTarget.ARRAY_BUFFER);
var boneweights = mesh.boneWeights;
var weightAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, boneweights.Select(y => new Vector4(y.weight0, y.weight1, y.weight2, y.weight3)).ToArray(), glBufferTarget.ARRAY_BUFFER);
var jointsAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, boneweights.Select(y => new UShort4((ushort)y.boneIndex0, (ushort)y.boneIndex1, (ushort)y.boneIndex2, (ushort)y.boneIndex3)).ToArray(), glBufferTarget.ARRAY_BUFFER);
var attributes = new glTFAttributes
{
POSITION = positionAccessorIndex,
};
if (normalAccessorIndex != -1)
{
attributes.NORMAL = normalAccessorIndex;
}
#if GLTF_EXPORT_TANGENTS
if (tangentAccessorIndex != -1)
{
attributes.TANGENT = tangentAccessorIndex;
}
#endif
if (uvAccessorIndex != -1)
{
attributes.TEXCOORD_0 = uvAccessorIndex;
}
if (colorAccessorIndex != -1)
{
attributes.COLOR_0 = colorAccessorIndex;
}
if (weightAccessorIndex != -1)
{
attributes.WEIGHTS_0 = weightAccessorIndex;
}
if (jointsAccessorIndex != -1)
{
attributes.JOINTS_0 = jointsAccessorIndex;
}
var gltfMesh = new glTFMesh(mesh.name);
for (int j = 0; j < mesh.subMeshCount; ++j)
{
var indices = TriangleUtil.FlipTriangle(mesh.GetIndices(j)).Select(y => (uint)y).ToArray();
var indicesAccessorIndex = gltf.ExtendBufferAndGetAccessorIndex(bufferIndex, indices, glBufferTarget.ELEMENT_ARRAY_BUFFER);
if (j >= materials.Length)
{
Debug.LogWarningFormat("{0}.materials is not enough", rendererName);
break;
}
gltfMesh.primitives.Add(new glTFPrimitives
{
attributes = attributes,
indices = indicesAccessorIndex,
mode = 4, // triangles ?
material = unityMaterials.IndexOf(materials[j])
});
}
return(gltfMesh);
}