public void ExportSkeletalMeshToFbx(MESkeletalMesh mesh, string meshName, string targetdir)
{
FBXManager lSdkManager = new FBXManager();
FBXScene lScene = new FBXScene();
FBXHelper.InitializeSdkObjects(lSdkManager, lScene);
FBXNode SceneRoot = lScene.GetRootNode();
FBXNode lSkeletonRoot = CreateFbxSkeleton(mesh.Bones, lScene);
SceneRoot.AddChild(lSkeletonRoot);
try
{
FBXNode fbxMesh = CreateFbxMesh(mesh, meshName, lScene);
CreateMeshSkinning(mesh, 0, fbxMesh, lSkeletonRoot, lScene);
SceneRoot.AddChild(fbxMesh);
//StoreRestPose(lScene, lSkeletonRoot, skeleton);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
bool lResult = FBXHelper.SaveScene(lSdkManager, lScene, targetdir);
FBXHelper.DestroySdkObjects(lSdkManager, lResult);
}
private List <int> GetSectionVertices(MESkeletalMesh mesh, int lod, int section)
{
var vertices = new HashSet <int>();
var cLOD = mesh.LODModels[lod];
for (int i = 0; i < cLOD.Sections[section].NumTriangles * 3; i++)
{
vertices.Add(cLOD.IndexBuffer.Indexes[(int)cLOD.Sections[section].BaseIndex + i]);
}
return(vertices.ToList());
}
public void ExportMeshesToFbx(string targetDir)
{
if (Pcc != null)
{
var meshExpIndexes = Pcc.Exports.Select((value, index) => new { value, index })
.Where(z => z.value.ClassName == "SkeletalMesh")
.Select(z => z.index);
foreach (int meshIndex in meshExpIndexes)
{
IExportEntry meshExp = Pcc.Exports[meshIndex];
MESkeletalMesh skMesh = new MESkeletalMesh(Pcc, meshIndex);
string fileDest = System.IO.Path.Combine(targetDir, meshExp.ObjectName + ".fbx");
ExportSkeletalMeshToFbx(skMesh, meshExp.ObjectName, fileDest);
}
}
}
private Dictionary <string, List <VertexWeight> > GetVertexGroups(MESkeletalMesh mesh, int lodIndex = 0)
{
Dictionary <string, List <VertexWeight> > VertexGroups = new Dictionary <string, List <VertexWeight> >();
var lod = mesh.LODModels[lodIndex];
for (int c = 0; c < lod.Chunks.Count; c++)
{
var chunk = lod.Chunks[c];
for (int v = chunk.BaseVertexIndex; v < chunk.BaseVertexIndex + chunk.NumRigidVertices + chunk.NumSoftVertices; v++)
{
var vertex = lod.VertexBufferGPUSkin.Vertices[v];
for (int x = 0; x < vertex.InfluenceWeights.Length; x++)
{
try
{
float weight = vertex.InfluenceWeights[x] / 255f;
if (weight != 0)
{
int bone = vertex.InfluenceBones[x];
bone = chunk.BoneMap[bone];
string boneName = mesh.Bones[bone].BoneName;
VertexWeight vw;
vw.vertexIndex = v;
vw.weight = weight;
if (!VertexGroups.ContainsKey(boneName))
{
VertexGroups.Add(boneName, new List <VertexWeight>());
}
VertexGroups[boneName].Add(vw);
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
}
return(VertexGroups);
}
private string GetMatName(MESkeletalMesh mesh, MESkeletalMesh.LODModelStruct lod, int s)
{
if (lod.Sections[s].MaterialIndex < mesh.Materials.Count)
{
if (mesh.Owner.isExport(mesh.Materials[lod.Sections[s].MaterialIndex] - 1))
{
return(mesh.Owner.Exports[mesh.Materials[lod.Sections[s].MaterialIndex] - 1].ObjectName);
}
else if (mesh.Owner.isImport(-mesh.Materials[lod.Sections[s].MaterialIndex] - 1))
{
return(mesh.Owner.Imports[-mesh.Materials[lod.Sections[s].MaterialIndex] - 1].ObjectName);
}
else
{
return("mat_" + s);
}
}
else
{
return("mat_" + s);
}
}
public void ExportMeshWithMorph(Unreal.BioMorphFace morph, int lodIndex, String targetdir)
{
FBXManager lSdkManager = new FBXManager();
FBXScene lScene = new FBXScene();
FBXHelper.InitializeSdkObjects(lSdkManager, lScene);
FBXNode SceneRoot = lScene.GetRootNode();
MESkeletalMesh mesh = morph.Apply();
FBXNode fbxMesh = CreateFbxMesh(mesh, morph.Name, lScene);
SceneRoot.AddChild(fbxMesh);
if (mesh.Bones != null)
{
FBXNode lSkeletonRoot = CreateFbxSkeleton(mesh.Bones, lScene);
CreateMeshSkinning(mesh, lodIndex, fbxMesh, lSkeletonRoot, lScene);
UpdateSkeletonWithMorph(morph, lSkeletonRoot);
SceneRoot.AddChild(lSkeletonRoot);
//StoreBindPose(lScene, fbxMesh);
}
bool lResult = FBXHelper.SaveScene(lSdkManager, lScene, targetdir);
FBXHelper.DestroySdkObjects(lSdkManager, lResult);
}
// SkeletalMesh
private void CreateMeshSkinning(MESkeletalMesh mesh, int lod, FBXNode pFbxMesh, FBXNode pSkeletonRoot, FBXScene pScene)
{
var vg = GetVertexGroups(mesh, lod);
CreateMeshSkinning(vg, pFbxMesh, pSkeletonRoot, pScene);
}
private FBXNode CreateFbxMesh(MESkeletalMesh mesh, string mname, FBXScene pScene, float exportScale = 1.0f)
{
MESkeletalMesh.LODModelStruct lod = mesh.LODModels[0];
FBXMesh fbxMesh = FBXMesh.Create(pScene, mname);
FBXNode lMeshNode = FBXNode.Create(pScene, mname);
lMeshNode.SetNodeAttribute(fbxMesh);
FBXGeometryElementTangent lGeometryElementTangent = fbxMesh.CreateElementTangent();
lGeometryElementTangent.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementMaterial lMaterialElement = fbxMesh.CreateElementMaterial();
lMaterialElement.SetMappingMode(FBXWrapper.MappingMode.eByPolygon);
lMaterialElement.SetReferenceMode(FBXWrapper.ReferenceMode.eIndexToDirect);
fbxMesh.InitControlPoints(lod.NumVertices);
// init UV maps
FBXGeometryElementUV[] UVs = new FBXGeometryElementUV[lod.Sections.Count];
for (int s = 0; s < lod.Sections.Count; s++)
{
string matName = GetMatName(mesh, lod, s);
UVs[s] = fbxMesh.CreateElementUV(matName);
UVs[s].SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
}
// vertices
for (int j = 0; j < lod.VertexBufferGPUSkin.Vertices.Count; j++)
{
var vertex = lod.VertexBufferGPUSkin.Vertices[j];
FBXVector4 position = new FBXVector4(vertex.Position.X * exportScale, -vertex.Position.Y * exportScale, vertex.Position.Z * exportScale, 0);
FBXVector4 normal = new FBXVector4(vertex.TangentX, 0, vertex.TangentZ, 0);
fbxMesh.SetControlPoint(j, position);
lGeometryElementTangent.Add(normal);
// uvs
for (int s = 0; s < lod.Sections.Count; s++)
{
var sectionVerts = GetSectionVertices(mesh, 0, s);
if (sectionVerts.Contains(j))
{
FBXVector4 texCoords = new FBXVector4(vertex.U, 1 - vertex.V, 0, 0);
UVs[s].Add(texCoords);
}
else
{
UVs[s].Add(new FBXVector4(0, 0, 0, 0));
}
}
}
// faces & mats
for (int s = 0; s < lod.Sections.Count; s++)
{
int chunkId = lod.Sections[s].ChunkIndex;
var chunk = lod.Chunks[chunkId];
// mat
string matName = GetMatName(mesh, lod, s);
lMeshNode.AddMaterial(pScene, matName);
// faces
for (int j = 0; j < lod.Sections[s].NumTriangles; j++)
{
int baseI = lod.Sections[s].BaseIndex;
fbxMesh.BeginPolygon(s);
fbxMesh.AddPolygon(lod.IndexBuffer.Indexes[baseI + j * 3]);
fbxMesh.AddPolygon(lod.IndexBuffer.Indexes[baseI + j * 3 + 1]);
fbxMesh.AddPolygon(lod.IndexBuffer.Indexes[baseI + j * 3 + 2]);
fbxMesh.EndPolygon();
}
}
return(lMeshNode);
}
