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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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128
AssetStudioFBXWrapper/FbxExporterContext.cs
View File

@ -246,14 +246,7 @@ namespace AssetStudio.FbxInterop
var mesh = AsFbxMeshCreateMesh(_pContext, frameNode);
var totalVertexCount = 0;
foreach (var m in importedMesh.SubmeshList)
{
totalVertexCount += m.VertexList.Count;
}
AsFbxMeshInitControlPoints(mesh, totalVertexCount);
AsFbxMeshInitControlPoints(mesh, importedMesh.VertexList.Count);
if (importedMesh.hasNormal)
{
@ -282,8 +275,6 @@ namespace AssetStudio.FbxInterop
AsFbxMeshCreateElementMaterial(mesh);
var firstVertex = 0;
foreach (var meshObj in importedMesh.SubmeshList)
{
var materialIndex = 0;
@ -345,71 +336,70 @@ namespace AssetStudio.FbxInterop
}
}
var vertexList = meshObj.VertexList;
var vertexCount = vertexList.Count;
for (var j = 0; j < vertexCount; j += 1)
{
var importedVertex = vertexList[j];
var vertex = importedVertex.Vertex;
AsFbxMeshSetControlPoint(mesh, j + firstVertex, vertex.X, vertex.Y, vertex.Z);
if (importedMesh.hasNormal)
{
var normal = importedVertex.Normal;
AsFbxMeshElementNormalAdd(mesh, 0, normal.X, normal.Y, normal.Z);
}
for (var uvIndex = 0; uvIndex < 2; uvIndex += 1)
{
if (importedMesh.hasUV[uvIndex])
{
var uv = importedVertex.UV[uvIndex];
AsFbxMeshElementUVAdd(mesh, uvIndex, uv[0], uv[1]);
}
}
if (importedMesh.hasTangent)
{
var tangent = importedVertex.Tangent;
AsFbxMeshElementTangentAdd(mesh, 0, tangent.X, tangent.Y, tangent.Z, tangent.W);
}
if (importedMesh.hasColor)
{
var color = importedVertex.Color;
AsFbxMeshElementVertexColorAdd(mesh, 0, color.R, color.G, color.B, color.A);
}
if (hasBones && importedVertex.BoneIndices != null)
{
var boneIndices = importedVertex.BoneIndices;
var boneWeights = importedVertex.Weights;
for (var k = 0; k < 4; k += 1)
{
if (boneIndices[k] < totalBoneCount && boneWeights[k] > 0)
{
AsFbxMeshSetBoneWeight(pClusterArray, boneIndices[k], j + firstVertex, boneWeights[k]);
}
}
}
}
foreach (var face in meshObj.FaceList)
{
var index0 = face.VertexIndices[0] + firstVertex;
var index1 = face.VertexIndices[1] + firstVertex;
var index2 = face.VertexIndices[2] + firstVertex;
var index0 = face.VertexIndices[0] + meshObj.BaseVertex;
var index1 = face.VertexIndices[1] + meshObj.BaseVertex;
var index2 = face.VertexIndices[2] + meshObj.BaseVertex;
AsFbxMeshAddPolygon(mesh, materialIndex, index0, index1, index2);
}
firstVertex += vertexCount;
}
var vertexList = importedMesh.VertexList;
var vertexCount = vertexList.Count;
for (var j = 0; j < vertexCount; j += 1)
{
var importedVertex = vertexList[j];
var vertex = importedVertex.Vertex;
AsFbxMeshSetControlPoint(mesh, j, vertex.X, vertex.Y, vertex.Z);
if (importedMesh.hasNormal)
{
var normal = importedVertex.Normal;
AsFbxMeshElementNormalAdd(mesh, 0, normal.X, normal.Y, normal.Z);
}
for (var uvIndex = 0; uvIndex < 2; uvIndex += 1)
{
if (importedMesh.hasUV[uvIndex])
{
var uv = importedVertex.UV[uvIndex];
AsFbxMeshElementUVAdd(mesh, uvIndex, uv[0], uv[1]);
}
}
if (importedMesh.hasTangent)
{
var tangent = importedVertex.Tangent;
AsFbxMeshElementTangentAdd(mesh, 0, tangent.X, tangent.Y, tangent.Z, tangent.W);
}
if (importedMesh.hasColor)
{
var color = importedVertex.Color;
AsFbxMeshElementVertexColorAdd(mesh, 0, color.R, color.G, color.B, color.A);
}
if (hasBones && importedVertex.BoneIndices != null)
{
var boneIndices = importedVertex.BoneIndices;
var boneWeights = importedVertex.Weights;
for (var k = 0; k < 4; k += 1)
{
if (boneIndices[k] < totalBoneCount && boneWeights[k] > 0)
{
AsFbxMeshSetBoneWeight(pClusterArray, boneIndices[k], j, boneWeights[k]);
}
}
}
}
if (hasBones)
{
IntPtr pSkinContext = IntPtr.Zero;
@ -646,4 +636,4 @@ namespace AssetStudio.FbxInterop
}
}
}
}