/// <summary>
/// Divide vertex buffer(Position, Normal, UV, VertexColor, Skinning and BlendShapes) by submesh usage, then export
/// </summary>
/// <param name="gltf"></param>
/// <param name="gltfBuffer"></param>
/// <param name="unityMesh"></param>
/// <param name="unityMaterials"></param>
/// <param name="axisInverter"></param>
/// <param name="settings"></param>
/// <returns></returns>
public static (glTFMesh, Dictionary <int, int>) Export(ExportingGltfData data,
MeshExportInfo unityMesh, List <Material> unityMaterials,
IAxisInverter axisInverter, GltfExportSettings settings)
{
var mesh = unityMesh.Mesh;
var gltfMesh = new glTFMesh(mesh.name);
if (settings.ExportTangents)
{
// no support
throw new NotImplementedException();
}
var positions = mesh.vertices;
var normals = mesh.normals;
var uv = mesh.uv;
var boneWeights = mesh.boneWeights;
if (boneWeights.All(x => x.weight0 == 0 && x.weight1 == 0 && x.weight2 == 0 && x.weight3 == 0))
{
boneWeights = null;
}
var colors = mesh.colors;
Func <int, int> getJointIndex = null;
if (boneWeights != null && boneWeights.Length == positions.Length)
{
getJointIndex = unityMesh.GetJointIndex;
}
Vector3[] blendShapePositions = new Vector3[mesh.vertexCount];
Vector3[] blendShapeNormals = new Vector3[mesh.vertexCount];
var vColorState = VertexColorUtility.DetectVertexColor(mesh, unityMaterials);
var exportVertexColor = (
(settings.KeepVertexColor && mesh.colors != null && mesh.colors.Length == mesh.vertexCount) || // vertex color を残す設定
vColorState == VertexColorState.ExistsAndIsUsed || // VColor使っている
vColorState == VertexColorState.ExistsAndMixed // VColorを使っているところと使っていないところが混在(とりあえずExportする)
);
var usedIndices = new List <int>();
for (int i = 0; i < mesh.subMeshCount; ++i)
{
var indices = mesh.GetIndices(i);
var hash = new HashSet <int>(indices);
// aggregate vertex attributes
var buffer = new MeshExportUtil.VertexBuffer(indices.Length, getJointIndex);
usedIndices.Clear();
for (int k = 0; k < positions.Length; ++k)
{
if (hash.Contains(k))
{
// aggregate indices
usedIndices.Add(k);
buffer.PushVertex(k,
axisInverter.InvertVector3(positions[k]), // POSITION
axisInverter.InvertVector3(normals[k]), // NORMAL
uv[k].ReverseUV() // UV
);
if (getJointIndex != null)
{
buffer.PushBoneWeight(boneWeights[k]);
}
if (exportVertexColor)
{
buffer.PushColor(colors[k]);
}
}
}
var material = unityMesh.Materials[i];
var materialIndex = -1;
if (material != null)
{
materialIndex = unityMaterials.IndexOf(material);
}
var flipped = new List <int>();
for (int j = 0; j < indices.Length; j += 3)
{
var t0 = indices[j];
var t1 = indices[j + 1];
var t2 = indices[j + 2];
flipped.Add(t2);
flipped.Add(t1);
flipped.Add(t0);
}
var gltfPrimitive = buffer.ToGltfPrimitive(data, materialIndex, flipped);
// blendShape(morph target)
for (int j = 0; j < mesh.blendShapeCount; ++j)
{
var blendShape = new MeshExportUtil.BlendShapeBuffer(usedIndices.Count);
// aggriage morph target
mesh.GetBlendShapeFrameVertices(j, 0, blendShapePositions, blendShapeNormals, null);
int l = 0;
foreach (var k in usedIndices)
{
blendShape.Set(l++,
axisInverter.InvertVector3(blendShapePositions[k]),
axisInverter.InvertVector3(blendShapeNormals[k]));
}
gltfPrimitive.targets.Add(blendShape.ToGltf(data, !settings.ExportOnlyBlendShapePosition,
settings.UseSparseAccessorForMorphTarget));
}
gltfMesh.primitives.Add(gltfPrimitive);
}
var targetNames = Enumerable.Range(0, mesh.blendShapeCount).Select(x => mesh.GetBlendShapeName(x)).ToArray();
gltf_mesh_extras_targetNames.Serialize(gltfMesh, targetNames);
return(gltfMesh, Enumerable.Range(0, mesh.blendShapeCount).ToDictionary(x => x, x => x));
}
public static glTFMesh Export(glTF gltf, int bufferIndex,
MeshWithRenderer unityMesh, List<Material> unityMaterials,
IAxisInverter axisInverter, MeshExportSettings settings)
{
var mesh = unityMesh.Mesh;
var gltfMesh = new glTFMesh(mesh.name);
if (settings.ExportTangents)
{
// support しない
throw new NotImplementedException();
}
var positions = mesh.vertices;
var normals = mesh.normals;
var uv = mesh.uv;
var boneWeights = mesh.boneWeights;
Func<int, int> getJointIndex = null;
if (boneWeights != null && boneWeights.Length == positions.Length)
{
getJointIndex = unityMesh.GetJointIndex;
}
Vector3[] blendShapePositions = new Vector3[mesh.vertexCount];
Vector3[] blendShapeNormals = new Vector3[mesh.vertexCount];
var usedIndices = new List<int>();
for (int i = 0; i < mesh.subMeshCount; ++i)
{
var indices = mesh.GetIndices(i);
// mesh
// index の順に attributes を蓄える
var buffer = new MeshExportUtil.VertexBuffer(indices.Length, getJointIndex);
usedIndices.Clear();
for (int k = 0; k < positions.Length; ++k)
{
if (indices.Contains(k))
{
// indices から参照される頂点だけを蓄える
usedIndices.Add(k);
buffer.Push(k, axisInverter.InvertVector3(positions[k]), axisInverter.InvertVector3(normals[k]), uv[k].ReverseUV());
if (getJointIndex != null)
{
buffer.Push(boneWeights[k]);
}
}
}
var material = unityMesh.Renderer.sharedMaterials[i];
var materialIndex = -1;
if (material != null)
{
materialIndex = unityMaterials.IndexOf(material);
}
var flipped = new List<int>();
for (int j = 0; j < indices.Length; j += 3)
{
var t0 = indices[j];
var t1 = indices[j + 1];
var t2 = indices[j + 2];
flipped.Add(t2);
flipped.Add(t1);
flipped.Add(t0);
}
var gltfPrimitive = buffer.ToGltfPrimitive(gltf, bufferIndex, materialIndex, flipped);
// blendShape
for (int j = 0; j < mesh.blendShapeCount; ++j)
{
var blendShape = new MeshExportUtil.BlendShapeBuffer(indices.Length);
// index の順に attributes を蓄える
mesh.GetBlendShapeFrameVertices(j, 0, blendShapePositions, blendShapeNormals, null);
foreach (var k in usedIndices)
{
blendShape.Push(
axisInverter.InvertVector3(blendShapePositions[k]),
axisInverter.InvertVector3(blendShapeNormals[k]));
}
gltfPrimitive.targets.Add(blendShape.ToGltf(gltf, bufferIndex, !settings.ExportOnlyBlendShapePosition));
}
gltfMesh.primitives.Add(gltfPrimitive);
}
var targetNames = Enumerable.Range(0, mesh.blendShapeCount).Select(x => mesh.GetBlendShapeName(x)).ToArray();
gltf_mesh_extras_targetNames.Serialize(gltfMesh, targetNames);
return gltfMesh;
}
/// <summary>
/// Divide vertex buffer(Position, Normal, UV, VertexColor, Skinning and BlendShapes) by submesh usage, then export
/// </summary>
/// <param name="gltf"></param>
/// <param name="gltfBuffer"></param>
/// <param name="unityMesh"></param>
/// <param name="unityMaterials"></param>
/// <param name="axisInverter"></param>
/// <param name="settings"></param>
/// <returns></returns>
public static (glTFMesh, Dictionary <int, int>) Export(glTF gltf, int gltfBuffer,
MeshExportInfo unityMesh, List <Material> unityMaterials,
IAxisInverter axisInverter, GltfExportSettings settings)
{
var mesh = unityMesh.Mesh;
var gltfMesh = new glTFMesh(mesh.name);
if (settings.ExportTangents)
{
// no support
throw new NotImplementedException();
}
var positions = mesh.vertices;
var normals = mesh.normals;
var uv = mesh.uv;
var boneWeights = mesh.boneWeights;
Func <int, int> getJointIndex = null;
if (boneWeights != null && boneWeights.Length == positions.Length)
{
getJointIndex = unityMesh.GetJointIndex;
}
Vector3[] blendShapePositions = new Vector3[mesh.vertexCount];
Vector3[] blendShapeNormals = new Vector3[mesh.vertexCount];
var usedIndices = new List <int>();
for (int i = 0; i < mesh.subMeshCount; ++i)
{
var indices = mesh.GetIndices(i);
var hash = new HashSet <int>(indices);
// aggrigate vertex attributes
var buffer = new MeshExportUtil.VertexBuffer(indices.Length, getJointIndex);
usedIndices.Clear();
for (int k = 0; k < positions.Length; ++k)
{
if (hash.Contains(k))
{
// aggrigate indices
usedIndices.Add(k);
buffer.Push(k, axisInverter.InvertVector3(positions[k]), axisInverter.InvertVector3(normals[k]), uv[k].ReverseUV());
if (getJointIndex != null)
{
buffer.Push(boneWeights[k]);
}
}
}
var material = unityMesh.Materials[i];
var materialIndex = -1;
if (material != null)
{
materialIndex = unityMaterials.IndexOf(material);
}
var flipped = new List <int>();
for (int j = 0; j < indices.Length; j += 3)
{
var t0 = indices[j];
var t1 = indices[j + 1];
var t2 = indices[j + 2];
flipped.Add(t2);
flipped.Add(t1);
flipped.Add(t0);
}
var gltfPrimitive = buffer.ToGltfPrimitive(gltf, gltfBuffer, materialIndex, flipped);
// blendShape(morph target)
for (int j = 0; j < mesh.blendShapeCount; ++j)
{
var blendShape = new MeshExportUtil.BlendShapeBuffer(usedIndices.Count);
// aggriage morph target
mesh.GetBlendShapeFrameVertices(j, 0, blendShapePositions, blendShapeNormals, null);
int l = 0;
foreach (var k in usedIndices)
{
blendShape.Set(l++,
axisInverter.InvertVector3(blendShapePositions[k]),
axisInverter.InvertVector3(blendShapeNormals[k]));
}
gltfPrimitive.targets.Add(blendShape.ToGltf(gltf, gltfBuffer, !settings.ExportOnlyBlendShapePosition,
settings.UseSparseAccessorForMorphTarget));
}
gltfMesh.primitives.Add(gltfPrimitive);
}
var targetNames = Enumerable.Range(0, mesh.blendShapeCount).Select(x => mesh.GetBlendShapeName(x)).ToArray();
gltf_mesh_extras_targetNames.Serialize(gltfMesh, targetNames);
return(gltfMesh, Enumerable.Range(0, mesh.blendShapeCount).ToDictionary(x => x, x => x));
}