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Fix blend shape export with multiple submeshes

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Share a single vertex list between submeshes in the exported mesh, which
makes the blend target vertex list indices line up correctly.

As a bonus, the exported FBX file will be smaller for meshes with more
than one submesh, since we're not duplicating vertices anymore.
This commit is contained in:
Dan Weatherford
2021-06-20 00:18:22 -05:00
parent ab98585b6a
commit 08b7bfcf9a
3 changed files with 140 additions and 158 deletions
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167
AssetStudioUtility/ModelConverter.cs
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@ -319,79 +319,8 @@ namespace AssetStudio
}
ImportedMaterial iMat = ConvertMaterial(mat);
iSubmesh.Material = iMat.Name;
iSubmesh.VertexList = new List<ImportedVertex>((int)submesh.vertexCount);
for (var j = mesh.m_SubMeshes[i].firstVertex; j < mesh.m_SubMeshes[i].firstVertex + mesh.m_SubMeshes[i].vertexCount; j++)
{
var iVertex = new ImportedVertex();
//Vertices
int c = 3;
if (mesh.m_Vertices.Length == mesh.m_VertexCount * 4)
{
c = 4;
}
iVertex.Vertex = new Vector3(-mesh.m_Vertices[j * c], mesh.m_Vertices[j * c + 1], mesh.m_Vertices[j * c + 2]);
//Normals
if (iMesh.hasNormal)
{
if (mesh.m_Normals.Length == mesh.m_VertexCount * 3)
{
c = 3;
}
else if (mesh.m_Normals.Length == mesh.m_VertexCount * 4)
{
c = 4;
}
iVertex.Normal = new Vector3(-mesh.m_Normals[j * c], mesh.m_Normals[j * c + 1], mesh.m_Normals[j * c + 2]);
}
//UV
iVertex.UV = new float[8][];
for (int uv = 0; uv < 8; uv++)
{
if (iMesh.hasUV[uv])
{
var m_UV = mesh.GetUV(uv);
if (m_UV.Length == mesh.m_VertexCount * 2)
{
c = 2;
}
else if (m_UV.Length == mesh.m_VertexCount * 3)
{
c = 3;
}
iVertex.UV[uv] = new[] { m_UV[j * c], m_UV[j * c + 1] };
}
}
//Tangent
if (iMesh.hasTangent)
{
iVertex.Tangent = new Vector4(-mesh.m_Tangents[j * 4], mesh.m_Tangents[j * 4 + 1], mesh.m_Tangents[j * 4 + 2], mesh.m_Tangents[j * 4 + 3]);
}
//Colors
if (iMesh.hasColor)
{
if (mesh.m_Colors.Length == mesh.m_VertexCount * 3)
{
iVertex.Color = new Color(mesh.m_Colors[j * 3], mesh.m_Colors[j * 3 + 1], mesh.m_Colors[j * 3 + 2], 1.0f);
}
else
{
iVertex.Color = new Color(mesh.m_Colors[j * 4], mesh.m_Colors[j * 4 + 1], mesh.m_Colors[j * 4 + 2], mesh.m_Colors[j * 4 + 3]);
}
}
//BoneInfluence
if (mesh.m_Skin?.Length > 0)
{
var inf = mesh.m_Skin[j];
iVertex.BoneIndices = new int[4];
iVertex.Weights = new float[4];
for (var k = 0; k < 4; k++)
{
iVertex.BoneIndices[k] = inf.boneIndex[k];
iVertex.Weights[k] = inf.weight[k];
}
}
iSubmesh.VertexList.Add(iVertex);
}
iSubmesh.BaseVertex = (int) mesh.m_SubMeshes[i].firstVertex;
//Face
iSubmesh.FaceList = new List<ImportedFace>(numFaces);
var end = firstFace + numFaces;
@ -405,9 +334,85 @@ namespace AssetStudio
iSubmesh.FaceList.Add(face);
}
firstFace = end;
iMesh.SubmeshList.Add(iSubmesh);
}
// Shared vertex list
iMesh.VertexList = new List<ImportedVertex>((int)mesh.m_VertexCount);
for (var j = 0; j < mesh.m_VertexCount; j++)
{
var iVertex = new ImportedVertex();
//Vertices
int c = 3;
if (mesh.m_Vertices.Length == mesh.m_VertexCount * 4)
{
c = 4;
}
iVertex.Vertex = new Vector3(-mesh.m_Vertices[j * c], mesh.m_Vertices[j * c + 1], mesh.m_Vertices[j * c + 2]);
//Normals
if (iMesh.hasNormal)
{
if (mesh.m_Normals.Length == mesh.m_VertexCount * 3)
{
c = 3;
}
else if (mesh.m_Normals.Length == mesh.m_VertexCount * 4)
{
c = 4;
}
iVertex.Normal = new Vector3(-mesh.m_Normals[j * c], mesh.m_Normals[j * c + 1], mesh.m_Normals[j * c + 2]);
}
//UV
iVertex.UV = new float[8][];
for (int uv = 0; uv < 8; uv++)
{
if (iMesh.hasUV[uv])
{
var m_UV = mesh.GetUV(uv);
if (m_UV.Length == mesh.m_VertexCount * 2)
{
c = 2;
}
else if (m_UV.Length == mesh.m_VertexCount * 3)
{
c = 3;
}
iVertex.UV[uv] = new[] { m_UV[j * c], m_UV[j * c + 1] };
}
}
//Tangent
if (iMesh.hasTangent)
{
iVertex.Tangent = new Vector4(-mesh.m_Tangents[j * 4], mesh.m_Tangents[j * 4 + 1], mesh.m_Tangents[j * 4 + 2], mesh.m_Tangents[j * 4 + 3]);
}
//Colors
if (iMesh.hasColor)
{
if (mesh.m_Colors.Length == mesh.m_VertexCount * 3)
{
iVertex.Color = new Color(mesh.m_Colors[j * 3], mesh.m_Colors[j * 3 + 1], mesh.m_Colors[j * 3 + 2], 1.0f);
}
else
{
iVertex.Color = new Color(mesh.m_Colors[j * 4], mesh.m_Colors[j * 4 + 1], mesh.m_Colors[j * 4 + 2], mesh.m_Colors[j * 4 + 3]);
}
}
//BoneInfluence
if (mesh.m_Skin?.Length > 0)
{
var inf = mesh.m_Skin[j];
iVertex.BoneIndices = new int[4];
iVertex.Weights = new float[4];
for (var k = 0; k < 4; k++)
{
iVertex.BoneIndices[k] = inf.boneIndex[k];
iVertex.Weights[k] = inf.weight[k];
}
}
iMesh.VertexList.Add(iVertex);
}
if (meshR is SkinnedMeshRenderer sMesh)
{
//Bone
@ -524,7 +529,7 @@ namespace AssetStudio
keyframe.VertexList.Add(destVertex);
var morphVertex = mesh.m_Shapes.vertices[j];
destVertex.Index = morphVertex.index;
var sourceVertex = GetSourceVertex(iMesh.SubmeshList, (int)morphVertex.index);
var sourceVertex = iMesh.VertexList[(int)morphVertex.index];
destVertex.Vertex = new ImportedVertex();
var morphPos = morphVertex.vertex;
destVertex.Vertex.Vertex = sourceVertex.Vertex + new Vector3(-morphPos.X, morphPos.Y, morphPos.Z);
@ -1014,20 +1019,6 @@ namespace AssetStudio
return boneName;
}
private static ImportedVertex GetSourceVertex(List<ImportedSubmesh> submeshList, int morphVertIndex)
{
foreach (var submesh in submeshList)
{
var vertList = submesh.VertexList;
if (morphVertIndex < vertList.Count)
{
return vertList[morphVertIndex];
}
morphVertIndex -= vertList.Count;
}
return null;
}
private void CreateBonePathHash(Transform m_Transform)
{
var name = GetTransformPathByFather(m_Transform);