public void DividedVertexBufferTest()
{
var glTF = new glTF();
var bytesBuffer = new ArrayByteBuffer(new byte[50 * 1024 * 1024]);
var bufferIndex = glTF.AddBuffer(bytesBuffer);
var Materials = new List <Material> {
new Material(Shader.Find("Standard")), // A
new Material(Shader.Find("Standard")), // B
};
var(go, mesh) = CreateMesh(Materials.ToArray());
var meshExportSettings = new GltfExportSettings
{
DivideVertexBuffer = true
};
var axisInverter = Axes.X.Create();
var unityMesh = MeshExportList.Create(go);
var(gltfMesh, blendShapeIndexMap) = meshExportSettings.DivideVertexBuffer
? MeshExporter_DividedVertexBuffer.Export(glTF, bufferIndex, unityMesh, Materials, axisInverter, meshExportSettings)
: MeshExporter_SharedVertexBuffer.Export(glTF, bufferIndex, unityMesh, Materials, axisInverter, meshExportSettings)
;
{
var indices = glTF.GetIndices(gltfMesh.primitives[0].indices);
Assert.AreEqual(0, indices[0]);
Assert.AreEqual(1, indices[1]);
Assert.AreEqual(3, indices[2]);
Assert.AreEqual(3, indices[3]);
Assert.AreEqual(1, indices[4]);
Assert.AreEqual(2, indices[5]);
}
{
var positions = glTF.GetArrayFromAccessor <Vector3>(gltfMesh.primitives[0].attributes.POSITION);
Assert.AreEqual(4, positions.Length);
}
{
var indices = glTF.GetIndices(gltfMesh.primitives[1].indices);
Assert.AreEqual(0, indices[0]);
Assert.AreEqual(1, indices[1]);
Assert.AreEqual(3, indices[2]);
Assert.AreEqual(3, indices[3]);
Assert.AreEqual(1, indices[4]);
Assert.AreEqual(2, indices[5]);
}
{
var positions = glTF.GetArrayFromAccessor <Vector3>(gltfMesh.primitives[1].attributes.POSITION);
Assert.AreEqual(4, positions.Length);
}
}
static MeshWithMaterials ImportMesh(glTF gltf, int meshIndex, glTFMesh gltfMesh,
List <Material> materials,
GetBlendShapeName getBlendShapeName
)
{
glTFAttributes lastAttributes = null;
var sharedAttributes = true;
foreach (var prim in gltfMesh.primitives)
{
if (lastAttributes != null && !prim.attributes.Equals(lastAttributes))
{
sharedAttributes = false;
break;
}
lastAttributes = prim.attributes;
}
var positions = new List <Vector3>();
var normals = new List <Vector3>();
var tangents = new List <Vector4>();
var colors = new List <Vector4>();
var uv = new List <Vector2>();
var boneWeights = new List <BoneWeight>();
var subMeshes = new List <int[]>();
var materialIndices = new List <int>();
BlendShape[] blendShapes = null;
if (sharedAttributes)
{
// multiple submesh sharing same VertexBuffer
{
var prim = gltfMesh.primitives.First();
positions.AddRange(gltf.GetArrayFromAccessor <Vector3>(prim.attributes.POSITION).Select(x => x.ReverseZ()));
// normal
if (prim.attributes.NORMAL != -1)
{
normals.AddRange(gltf.GetArrayFromAccessor <Vector3>(prim.attributes.NORMAL).Select(x => x.ReverseZ()));
}
// tangent
if (prim.attributes.TANGENT != -1)
{
tangents.AddRange(gltf.GetArrayFromAccessor <Vector4>(prim.attributes.TANGENT).Select(x => x.ReverseZ()));
}
// vertex color
if (prim.attributes.COLOR_0 != -1)
{
colors.AddRange(gltf.GetArrayFromAccessor <Vector4>(prim.attributes.COLOR_0));
}
// uv
if (prim.attributes.TEXCOORD_0 != -1)
{
uv.AddRange(gltf.GetArrayFromAccessor <Vector2>(prim.attributes.TEXCOORD_0).Select(x => x.ReverseY()));
}
else
{
// for inconsistent attributes in primitives
uv.AddRange(new Vector2[positions.Count]);
}
// skin
if (prim.attributes.JOINTS_0 != -1 && prim.attributes.WEIGHTS_0 != -1)
{
var joints0 = gltf.GetArrayFromAccessor <UShort4>(prim.attributes.JOINTS_0); // uint4
var weights0 = 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;
boneWeights.Add(bw);
}
}
// blendshape
if (prim.targets != null && prim.targets.Count > 0)
{
if (blendShapes == null)
{
blendShapes = prim.targets.Select((x, i) => new BlendShape(getBlendShapeName(meshIndex, i))).ToArray();
}
for (int i = 0; i < prim.targets.Count; ++i)
{
//var name = string.Format("target{0}", i++);
var primTarget = prim.targets[i];
var blendShape = blendShapes[i];
if (primTarget.POSITION != -1)
{
blendShape.Positions.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.POSITION).Select(x => x.ReverseZ()).ToArray());
}
if (primTarget.NORMAL != -1)
{
blendShape.Normals.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.NORMAL).Select(x => x.ReverseZ()).ToArray());
}
if (primTarget.TANGENT != -1)
{
blendShape.Tangents.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.TANGENT).Select(x => x.ReverseZ()).ToArray());
}
}
}
}
foreach (var prim in gltfMesh.primitives)
{
var indices = gltf.GetIndices(prim.indices).Select(x => x).ToArray();
subMeshes.Add(indices);
// material
materialIndices.Add(prim.material);
}
}
else
{
// multiple submMesh is not sharing a VertexBuffer.
// each subMesh use a independent VertexBuffer.
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("diffirent targets: {0} with {1}",
gltfMesh.primitives[i],
targets));
}
}
foreach (var prim in gltfMesh.primitives)
{
var indexOffset = positions.Count;
var indexBuffer = prim.indices;
var positionCount = positions.Count;
positions.AddRange(gltf.GetArrayFromAccessor <Vector3>(prim.attributes.POSITION).Select(x => x.ReverseZ()));
positionCount = positions.Count - positionCount;
// normal
if (prim.attributes.NORMAL != -1)
{
normals.AddRange(gltf.GetArrayFromAccessor <Vector3>(prim.attributes.NORMAL).Select(x => x.ReverseZ()));
}
if (prim.attributes.TANGENT != -1)
{
tangents.AddRange(gltf.GetArrayFromAccessor <Vector4>(prim.attributes.TANGENT).Select(x => x.ReverseZ()));
}
// vertex color
if (prim.attributes.COLOR_0 != -1)
{
colors.AddRange(gltf.GetArrayFromAccessor <Vector4>(prim.attributes.COLOR_0));
}
// uv
if (prim.attributes.TEXCOORD_0 != -1)
{
uv.AddRange(gltf.GetArrayFromAccessor <Vector2>(prim.attributes.TEXCOORD_0).Select(x => x.ReverseY()));
}
else
{
// for inconsistent attributes in primitives
uv.AddRange(new Vector2[positionCount]);
}
// skin
if (prim.attributes.JOINTS_0 != -1 && prim.attributes.WEIGHTS_0 != -1)
{
var joints0 = gltf.GetArrayFromAccessor <UShort4>(prim.attributes.JOINTS_0); // uint4
var weights0 = 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;
boneWeights.Add(bw);
}
}
// blendshape
if (prim.targets != null && prim.targets.Count > 0)
{
if (blendShapes == null)
{
blendShapes = prim.targets.Select((x, i) => new BlendShape(i.ToString())).ToArray();
}
for (int i = 0; i < prim.targets.Count; ++i)
{
//var name = string.Format("target{0}", i++);
var primTarget = prim.targets[i];
var blendShape = blendShapes[i];
if (primTarget.POSITION != -1)
{
blendShape.Positions.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.POSITION).Select(x => x.ReverseZ()).ToArray());
}
if (primTarget.NORMAL != -1)
{
blendShape.Normals.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.NORMAL).Select(x => x.ReverseZ()).ToArray());
}
if (primTarget.TANGENT != -1)
{
blendShape.Tangents.AddRange(
gltf.GetArrayFromAccessor <Vector3>(primTarget.TANGENT).Select(x => x.ReverseZ()).ToArray());
}
}
}
var indices =
(indexBuffer >= 0)
? gltf.GetIndices(indexBuffer).Select(x => x + indexOffset).ToArray()
: TriangleUtil.FlipTriangle(Enumerable.Range(0, positions.Count)).ToArray() // without index array
;
subMeshes.Add(indices);
// material
materialIndices.Add(prim.material);
}
}
if (!materialIndices.Any())
{
materialIndices.Add(0);
}
//Debug.Log(prims.ToJson());
var mesh = new Mesh();
mesh.name = gltfMesh.name;
if (positions.Count > UInt16.MaxValue)
{
#if UNITY_2017_3_OR_NEWER
mesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
#else
Debug.LogWarningFormat("vertices {0} exceed 65535. not implemented. Unity2017.3 supports large mesh", positions.Count);
#endif
}
mesh.vertices = positions.ToArray();
if (normals.Any())
{
mesh.normals = normals.ToArray();
}
else
{
mesh.RecalculateNormals();
}
if (tangents.Any())
{
mesh.tangents = tangents.ToArray();
}
else
{
mesh.RecalculateTangents();
}
if (colors.Any())
{
mesh.colors = colors.ConvertAll(x => new Color(x.x, x.y, x.z, 1f)).ToArray();
}
if (uv.Any())
{
mesh.uv = uv.ToArray();
}
if (boneWeights.Any())
{
mesh.boneWeights = boneWeights.ToArray();
}
mesh.subMeshCount = subMeshes.Count;
for (int i = 0; i < subMeshes.Count; ++i)
{
mesh.SetTriangles(subMeshes[i], i);
}
var result = new MeshWithMaterials
{
Mesh = mesh,
Materials = materialIndices.Select(x => materials[x]).ToArray()
};
List <Material> matList = result.Materials.ToList();
matList.RemoveAll(x => x == null);
result.Materials = matList.ToArray();
if (blendShapes != null)
{
foreach (var blendShape in blendShapes)
{
if (blendShape.Positions.Count > 0)
{
if (blendShape.Positions.Count == mesh.vertexCount)
{
mesh.AddBlendShapeFrame(blendShape.Name, FRAME_WEIGHT,
blendShape.Positions.ToArray(),
normals.Count == mesh.vertexCount ? blendShape.Normals.ToArray() : null,
null
);
}
else
{
Debug.LogWarningFormat("May be partial primitive has blendShape. Rquire separete mesh or extend blend shape, but not implemented: {0}", blendShape.Name);
}
}
}
}
return(result);
}