private static int GetVertexGroups(SkeletonAsset skeleton, MeshLodSection section, int offset, ref Dictionary <string, List <VertexWeight> > VertexGroupDict)
{
int VertexCount = offset;
for (int i = 0; i < section.vertices.Count; i++)
{
for (int x = 0; x < 4; x++)
{
float Weight = section.vertices[i].boneWeights[x];
// added condition to only add meaningful weights
if (Weight != 0.0f)
{
int BoneIndex = section.vertices[i].boneIndices[x];
int SubObjectBoneIndex = section.boneIndices[BoneIndex];
string bn = skeleton.Bones[SubObjectBoneIndex].Name;
if (!VertexGroupDict.ContainsKey(bn))
{
VertexGroupDict.Add(bn, new List <VertexWeight>());
}
VertexGroupDict[bn].Add(new VertexWeight(offset + i, Weight));
}
}
VertexCount++;
}
return(VertexCount);
}
private FBXNode CreateFbxMesh(MeshLodSection section, FBXScene pScene)
{
FBXMesh fbxMesh = FBXMesh.Create(pScene, section.matName);
FBXGeometryElementNormal lGeometryElementNormal = fbxMesh.CreateElementNormal();
lGeometryElementNormal.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementBinormal lGeometryElementBiNormal = fbxMesh.CreateElementBinormal();
lGeometryElementBiNormal.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementTangent lGeometryElementTangent = fbxMesh.CreateElementTangent();
lGeometryElementTangent.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
fbxMesh.InitControlPoints(section.vertices.Count);
FBXGeometryElementMaterial lMaterialElement = fbxMesh.CreateElementMaterial();
lMaterialElement.SetMappingMode(FBXWrapper.MappingMode.eByPolygon);
lMaterialElement.SetReferenceMode(FBXWrapper.ReferenceMode.eIndexToDirect);
FBXGeometryElementUV lUVDiffuseElement = fbxMesh.CreateElementUV(section.matName);
lUVDiffuseElement.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
lUVDiffuseElement.SetReferenceMode(FBXWrapper.ReferenceMode.eIndexToDirect);
lUVDiffuseElement.SetIndexArrayCount(section.vertices.Count);
for (int j = 0; j < section.vertices.Count; j++)
{
FBXVector4 position = new FBXVector4(section.vertices[j].position.members[0] * exportScale, section.vertices[j].position.members[1] * exportScale, section.vertices[j].position.members[2] * exportScale, 0);
FBXVector4 normal = new FBXVector4(section.vertices[j].normals.members[0], section.vertices[j].normals.members[1], section.vertices[j].normals.members[2], section.vertices[j].normals.members[3]);
FBXVector4 textCoords = new FBXVector4(section.vertices[j].texCoords.members[0], (-section.vertices[j].texCoords.members[1] + 1), 0, 0);
FBXVector4 bitangent = new FBXVector4(section.vertices[j].biTangents.members[0], section.vertices[j].biTangents.members[1], section.vertices[j].biTangents.members[2], section.vertices[j].biTangents.members[3]);
FBXVector4 tangent = new FBXVector4(section.vertices[j].tangents.members[0], section.vertices[j].tangents.members[1], section.vertices[j].tangents.members[2], section.vertices[j].tangents.members[3]);
fbxMesh.SetControlPoint(j, position);
lGeometryElementNormal.Add(normal);
lGeometryElementBiNormal.Add(bitangent);
lGeometryElementTangent.Add(tangent);
lUVDiffuseElement.Add(textCoords);
}
for (int j = 0; j < section.indicies.Count; j++)
{
if (j % 3 == 0)
{
fbxMesh.EndPolygon();
fbxMesh.BeginPolygon();
}
fbxMesh.AddPolygon(section.indicies[j]);
}
fbxMesh.EndPolygon();
FBXNode lMeshNode = FBXNode.Create(pScene, section.matName);
lMeshNode.SetNodeAttribute(fbxMesh);
lMeshNode.AddMaterial(pScene, section.matName);
return(lMeshNode);
}
private void CreateMeshSkinning(SkeletonAsset Skeleton, MeshLodSection section, FBXNode pFbxMesh, FBXNode pSkeletonRoot, FBXScene pScene)
{
Dictionary <string, List <VertexGroup.VertexWeight> > vg = VertexGroup.GetVertexGroups(Skeleton, section);
CreateMeshSkinning(vg, pFbxMesh, pSkeletonRoot, pScene);
}
private FBXNode CreateFbxMesh(MeshLOD lod, FBXScene pScene)
{
FBXMesh fbxMesh = FBXMesh.Create(pScene, lod.shortName);
FBXNode lMeshNode = FBXNode.Create(pScene, lod.shortName);
lMeshNode.SetNodeAttribute(fbxMesh);
FBXGeometryElementNormal lGeometryElementNormal = fbxMesh.CreateElementNormal();
lGeometryElementNormal.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementBinormal lGeometryElementBiNormal = fbxMesh.CreateElementBinormal();
lGeometryElementBiNormal.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementTangent lGeometryElementTangent = fbxMesh.CreateElementTangent();
lGeometryElementTangent.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementMaterial lMaterialElement = fbxMesh.CreateElementMaterial();
lMaterialElement.SetMappingMode(FBXWrapper.MappingMode.eByPolygon);
lMaterialElement.SetReferenceMode(FBXWrapper.ReferenceMode.eIndexToDirect);
int verticesCount = lod.GetLODTotalVertCount();
fbxMesh.InitControlPoints(verticesCount);
List <FBXGeometryElementUV[]> UVs = new List <FBXGeometryElementUV[]>();
for (int i = 0; i < lod.sections.Count; i++)
{
UVs.Add(new FBXGeometryElementUV[Vertex.UV_SLOTS]);
}
int VertexOffset = 0;
for (int i = 0; i < lod.sections.Count; i++)
{
MeshLodSection section = lod.sections[i];
for (int j = 0; j < section.vertices.Count; j++)
{
FBXVector4 position = new FBXVector4(section.vertices[j].position.members[0] * exportScale, section.vertices[j].position.members[1] * exportScale, section.vertices[j].position.members[2] * exportScale, 0);
FBXVector4 normal = new FBXVector4(section.vertices[j].normals.members[0], section.vertices[j].normals.members[1], section.vertices[j].normals.members[2], section.vertices[j].normals.members[3]);
fbxMesh.SetControlPoint(VertexOffset + j, position);
lGeometryElementNormal.Add(normal);
// adding a check on bitangent and tangent as some meshes don't have them...
if (section.vertices[j].biTangents.members.Length == 4)
{
FBXVector4 bitangent = new FBXVector4(section.vertices[j].biTangents.members[0], section.vertices[j].biTangents.members[1], section.vertices[j].biTangents.members[2], section.vertices[j].biTangents.members[3]);
lGeometryElementBiNormal.Add(bitangent);
}
if (section.vertices[j].tangents.members.Length == 4)
{
FBXVector4 tangent = new FBXVector4(section.vertices[j].tangents.members[0], section.vertices[j].tangents.members[1], section.vertices[j].tangents.members[2], section.vertices[j].tangents.members[3]);
lGeometryElementTangent.Add(tangent);
}
// multiple UVs management
for (int uvInd = 0; uvInd < Vertex.UV_SLOTS; uvInd++)
{
if (section.vertices[j].texCoords[uvInd] != null)
{
FBXVector4 texCoords = new FBXVector4(section.vertices[j].texCoords[uvInd].members[0], (-section.vertices[j].texCoords[uvInd].members[1] + 1), 0, 0);
if (UVs[i][uvInd] == null)
{
// if the UV layer does not already exist, we create it...
UVs[i][uvInd] = fbxMesh.CreateElementUV(section.matName + "_" + uvInd);
UVs[i][uvInd].SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
UVs[i][uvInd].SetReferenceMode(FBXWrapper.ReferenceMode.eDirect);
// ... and fill it with empty vectors for all previous sections vertices.
for (int p = 0; p < VertexOffset + j; p++)
{
UVs[i][uvInd].Add(new FBXVector4(0, 0, 0, 0));
}
}
// and now we can add the tex coord of the current vertex we're treating.
UVs[i][uvInd].Add(texCoords);
}
}
// since we use direct reference mode for UV, every vertices in the mesh must be present in every UV layer
// so for every UV layer created for previous section, we had an empty vector for this vertex.
UVs.Where((o, oi) => oi != i).ToList().ForEach(suv =>
{
for (int subuv = 0; subuv < Vertex.UV_SLOTS; subuv++)
{
if (suv[subuv] != null)
{
suv[subuv].Add(new FBXVector4(0, 0, 0, 0));
}
}
}
);
}
for (int j = 0; j < section.indicies.Count; j++)
{
if (j % 3 == 0)
{
fbxMesh.EndPolygon();
fbxMesh.BeginPolygon(i);
}
fbxMesh.AddPolygon(VertexOffset + section.indicies[j]);
}
fbxMesh.EndPolygon();
VertexOffset = VertexOffset + section.vertices.Count;
lMeshNode.AddMaterial(pScene, section.matName);
}
return(lMeshNode);
}
public static Dictionary <string, List <VertexWeight> > GetVertexGroups(SkeletonAsset skeleton, MeshLodSection section)
{
var VertexGroups = new Dictionary <string, List <VertexWeight> >();
GetVertexGroups(skeleton, section, 0, ref VertexGroups);
return(VertexGroups);
}
// export given LOD to psk
private byte[] ExportSkinnedMeshToPsk(SkeletonAsset skeleton, MeshLOD LOD, float OverrideScale = 1.0f)
{
PSKFile Psk = new PSKFile();
Psk.points = new List <PSKFile.PSKPoint>();
Psk.edges = new List <PSKFile.PSKEdge>();
Psk.materials = new List <PSKFile.PSKMaterial>();
Psk.bones = new List <PSKFile.PSKBone>();
Psk.faces = new List <PSKFile.PSKFace>();
Psk.weights = new List <PSKFile.PSKWeight>();
/* No skeleton defined still */
if (skeleton != null)
{
for (int i = 0; i < skeleton.Bones.Count; i++)
{
PSKFile.PSKBone Bone = new PSKFile.PSKBone();
Bone.name = skeleton.Bones[i].Name;
Bone.childs = skeleton.Bones[i].Children.Count;
Bone.parent = (skeleton.Bones[i].ParentIndex == -1) ? 0 : skeleton.Bones[i].ParentIndex;
Bone.index = i;
Bone.location = new PSKFile.PSKPoint(ConvertVector3ToPsk(skeleton.Bones[i].Location) * OverrideScale);
Bone.rotation = new PSKFile.PSKQuad(0, 0, 0, 0);
float[][] RotMatrix = new float[4][];
RotMatrix[0] = new float[4];
RotMatrix[1] = new float[4];
RotMatrix[2] = new float[4];
RotMatrix[3] = new float[4];
RotMatrix[0][0] = skeleton.Bones[i].Right.members[0]; RotMatrix[0][1] = skeleton.Bones[i].Right.members[1]; RotMatrix[0][2] = skeleton.Bones[i].Right.members[2]; RotMatrix[0][3] = 0.0f;
RotMatrix[1][0] = skeleton.Bones[i].Up.members[0]; RotMatrix[1][1] = skeleton.Bones[i].Up.members[1]; RotMatrix[1][2] = skeleton.Bones[i].Up.members[2]; RotMatrix[1][3] = 0.0f;
RotMatrix[2][0] = skeleton.Bones[i].Forward.members[0]; RotMatrix[2][1] = skeleton.Bones[i].Forward.members[1]; RotMatrix[2][2] = skeleton.Bones[i].Forward.members[2]; RotMatrix[2][3] = 0.0f;
RotMatrix[3][0] = 0.0f; RotMatrix[3][1] = 0.0f; RotMatrix[3][2] = 0.0f; RotMatrix[3][3] = 1.0f;
Vector Quat = new Vector(new float[4]);
float tr = RotMatrix[0][0] + RotMatrix[1][1] + RotMatrix[2][2];
float s;
if (tr > 0.0f)
{
float InvS = 1.0f / (float)Math.Sqrt(tr + 1.0f);
Quat.members[3] = 0.5f * (1.0f / InvS);
s = 0.5f * InvS;
Quat.members[0] = (RotMatrix[1][2] - RotMatrix[2][1]) * s;
Quat.members[1] = (RotMatrix[2][0] - RotMatrix[0][2]) * s;
Quat.members[2] = (RotMatrix[0][1] - RotMatrix[1][0]) * s;
}
else
{
int m = 0;
if (RotMatrix[1][1] > RotMatrix[0][0])
{
m = 1;
}
if (RotMatrix[2][2] > RotMatrix[m][m])
{
m = 2;
}
int[] nxt = new int[] { 1, 2, 0 };
int j = nxt[m];
int k = nxt[j];
s = RotMatrix[m][m] - RotMatrix[j][j] - RotMatrix[k][k] + 1.0f;
float InvS = 1.0f / (float)Math.Sqrt(s);
float[] qt = new float[4];
qt[m] = 0.5f * (1.0f / InvS);
s = 0.5f * InvS;
qt[3] = (RotMatrix[j][k] - RotMatrix[k][j]) * s;
qt[j] = (RotMatrix[m][j] + RotMatrix[j][m]) * s;
qt[k] = (RotMatrix[m][k] + RotMatrix[k][m]) * s;
Quat.members[0] = qt[0];
Quat.members[1] = qt[1];
Quat.members[2] = qt[2];
Quat.members[3] = qt[3];
}
Bone.rotation = new PSKFile.PSKQuad(ConvertVector4ToPsk(Quat));
Psk.bones.Add(Bone);
}
}
int offset = 0;
int matIdx = 0;
for (int bufIdx = 0; bufIdx < LOD.sections.Count; bufIdx++)
{
MeshLodSection MeshBuffer = LOD.sections[bufIdx];
for (int i = 0; i < MeshBuffer.vertices.Count; i++)
{
if (MeshBuffer.vertices[i].position.members.Length != 3)
{
MeshBuffer.vertices[i].position.members = new float[3];
}
if (MeshBuffer.vertices[i].texCoords.members.Length != 2)
{
MeshBuffer.vertices[i].texCoords.members = new float[2];
}
Vector p = new Vector(MeshBuffer.vertices[i].position.members[0], MeshBuffer.vertices[i].position.members[1], MeshBuffer.vertices[i].position.members[2]);
Psk.points.Add(new PSKFile.PSKPoint(ConvertVector3ToPsk(p)));
Vector tc = new Vector(MeshBuffer.vertices[i].texCoords.members[0], MeshBuffer.vertices[i].texCoords.members[1]);
Psk.edges.Add(new PSKFile.PSKEdge((ushort)(offset + i), ConvertVector2ToPsk(tc), (byte)matIdx));
if (MeshBuffer.vertices[i].boneWeights != null)
{
for (int x = 0; x < 4; x++)
{
float Weight = MeshBuffer.vertices[i].boneWeights[x];
// only add meaningful weights
if (Weight != 0.0f)
{
int BoneIndex = MeshBuffer.vertices[i].boneIndices[x];
int SubObjectBoneIndex = MeshBuffer.boneIndices[BoneIndex];
Psk.weights.Add(new PSKFile.PSKWeight(
Weight,
(int)(offset + i),
SubObjectBoneIndex
));
}
}
}
}
// reverse indices order before building faces: necessary for correct normal building since all points have been mirrored along z-axis.
// if this is not done, all normals are flipped inside.
if (Reverse)
{
MeshBuffer.indicies.Reverse();
}
for (int fi = 0; fi < MeshBuffer.indicies.Count; fi++)
{
if (fi % 3 == 0)
{
Psk.faces.Add(new PSKFile.PSKFace(
(int)(offset + MeshBuffer.indicies[fi]),
(int)(offset + MeshBuffer.indicies[fi + 1]),
(int)(offset + MeshBuffer.indicies[fi + 2]),
(byte)matIdx)
);
}
}
Psk.materials.Add(new PSKFile.PSKMaterial(LOD.sections[bufIdx].matName, matIdx));
offset += (int)LOD.sections[bufIdx].vertCount;
matIdx++;
}
return(Psk.SaveToMemory().ToArray());
}
// export given LOD to psk
private byte[] ExportSkinnedMeshToPsk(SkeletonAsset skeleton, MeshLOD LOD, float OverrideScale = 1.0f)
{
PSKFile Psk = new PSKFile();
Psk.points = new List <PSKFile.PSKPoint>();
Psk.edges = new List <PSKFile.PSKEdge>();
Psk.materials = new List <PSKFile.PSKMaterial>();
Psk.bones = new List <PSKFile.PSKBone>();
Psk.faces = new List <PSKFile.PSKFace>();
Psk.weights = new List <PSKFile.PSKWeight>();
// create skeleton (only if mesh is skinned mesh)
if (LOD.type == MeshType.MeshType_Skinned)
{
Psk.bones = CreatePskSkeleton(skeleton, OverrideScale);
}
// create mesh
int offset = 0;
int matIdx = 0;
for (int bufIdx = 0; bufIdx < LOD.sections.Count; bufIdx++)
{
MeshLodSection MeshBuffer = LOD.sections[bufIdx];
for (int i = 0; i < MeshBuffer.vertices.Count; i++)
{
// vertex position
if (MeshBuffer.vertices[i].position.members.Length != 3)
{
MeshBuffer.vertices[i].position.members = new float[3];
}
Vector p = new Vector(MeshBuffer.vertices[i].position.members[0] * OverrideScale, MeshBuffer.vertices[i].position.members[1] * OverrideScale, MeshBuffer.vertices[i].position.members[2] * OverrideScale);
Psk.points.Add(new PSKFile.PSKPoint(ConvertVector3ToPsk(p)));
// vertex uv
// supports only first uv for the time being
// TODO support for multiple UVs
if (MeshBuffer.vertices[i].texCoords[0] == null)
{
MeshBuffer.vertices[i].texCoords[0] = new Vector(new float[2]);
}
if (MeshBuffer.vertices[i].texCoords[0].members.Length != 2)
{
MeshBuffer.vertices[i].texCoords[0].members = new float[2];
}
Vector tc = new Vector(MeshBuffer.vertices[i].texCoords[0].members[0], MeshBuffer.vertices[i].texCoords[0].members[1]);
Psk.edges.Add(new PSKFile.PSKEdge((ushort)(offset + i), ConvertVector2ToPsk(tc), (byte)matIdx));
// bones weights
if (MeshBuffer.vertices[i].boneWeights != null)
{
for (int x = 0; x < 4; x++)
{
float Weight = MeshBuffer.vertices[i].boneWeights[x];
// only add meaningful weights
if (Weight != 0.0f)
{
int BoneIndex = MeshBuffer.vertices[i].boneIndices[x];
int SubObjectBoneIndex = MeshBuffer.boneIndices[BoneIndex];
Psk.weights.Add(new PSKFile.PSKWeight(
Weight,
(int)(offset + i),
SubObjectBoneIndex
));
}
}
}
}
// reverse indices order before building faces: necessary for correct normal building since all points have been mirrored along z-axis.
// if this is not done, all normals are flipped inside.
if (Reverse)
{
MeshBuffer.indicies.Reverse();
}
for (int fi = 0; fi < MeshBuffer.indicies.Count; fi++)
{
if (fi % 3 == 0)
{
Psk.faces.Add(new PSKFile.PSKFace(
(int)(offset + MeshBuffer.indicies[fi]),
(int)(offset + MeshBuffer.indicies[fi + 1]),
(int)(offset + MeshBuffer.indicies[fi + 2]),
(byte)matIdx)
);
}
}
Psk.materials.Add(new PSKFile.PSKMaterial(LOD.sections[bufIdx].matName, matIdx));
offset += (int)LOD.sections[bufIdx].vertCount;
matIdx++;
}
return(Psk.SaveToMemory().ToArray());
}
private FBXNode CreateFbxMesh(MeshLOD lod, FBXScene pScene)
{
FBXMesh fbxMesh = FBXMesh.Create(pScene, lod.shortName);
FBXNode lMeshNode = FBXNode.Create(pScene, lod.shortName);
lMeshNode.SetNodeAttribute(fbxMesh);
FBXGeometryElementNormal lGeometryElementNormal = fbxMesh.CreateElementNormal();
lGeometryElementNormal.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementBinormal lGeometryElementBiNormal = fbxMesh.CreateElementBinormal();
lGeometryElementBiNormal.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementTangent lGeometryElementTangent = fbxMesh.CreateElementTangent();
lGeometryElementTangent.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
FBXGeometryElementMaterial lMaterialElement = fbxMesh.CreateElementMaterial();
lMaterialElement.SetMappingMode(FBXWrapper.MappingMode.eByPolygon);
lMaterialElement.SetReferenceMode(FBXWrapper.ReferenceMode.eIndexToDirect);
int verticesCount = lod.GetLODTotalVertCount();
fbxMesh.InitControlPoints(verticesCount);
List <FBXGeometryElementUV> UVs = new List <FBXGeometryElementUV>();
for (int i = 0; i < lod.sections.Count; i++)
{
MeshLodSection section = lod.sections[i];
FBXGeometryElementUV lUVDiffuseElement = fbxMesh.CreateElementUV(section.matName);
lUVDiffuseElement.SetMappingMode(FBXWrapper.MappingMode.eByControlPoint);
lUVDiffuseElement.SetReferenceMode(FBXWrapper.ReferenceMode.eDirect);
UVs.Add(lUVDiffuseElement);
}
int VertexOffset = 0;
for (int i = 0; i < lod.sections.Count; i++)
{
MeshLodSection section = lod.sections[i];
for (int j = 0; j < section.vertices.Count; j++)
{
FBXVector4 position = new FBXVector4(section.vertices[j].position.members[0] * exportScale, section.vertices[j].position.members[1] * exportScale, section.vertices[j].position.members[2] * exportScale, 0);
FBXVector4 normal = new FBXVector4(section.vertices[j].normals.members[0], section.vertices[j].normals.members[1], section.vertices[j].normals.members[2], section.vertices[j].normals.members[3]);
FBXVector4 textCoords = new FBXVector4(section.vertices[j].texCoords.members[0], (-section.vertices[j].texCoords.members[1] + 1), 0, 0);
FBXVector4 bitangent = new FBXVector4(section.vertices[j].biTangents.members[0], section.vertices[j].biTangents.members[1], section.vertices[j].biTangents.members[2], section.vertices[j].biTangents.members[3]);
FBXVector4 tangent = new FBXVector4(section.vertices[j].tangents.members[0], section.vertices[j].tangents.members[1], section.vertices[j].tangents.members[2], section.vertices[j].tangents.members[3]);
fbxMesh.SetControlPoint(VertexOffset + j, position);
lGeometryElementNormal.Add(normal);
lGeometryElementBiNormal.Add(bitangent);
lGeometryElementTangent.Add(tangent);
int uvI = 0;
foreach (FBXGeometryElementUV uv in UVs)
{
if (uvI == i)
{
uv.Add(textCoords);
}
else
{
uv.Add(new FBXVector4(0, 0, 0, 0));
}
uvI++;
}
}
for (int j = 0; j < section.indicies.Count; j++)
{
if (j % 3 == 0)
{
fbxMesh.EndPolygon();
fbxMesh.BeginPolygon(i);
}
fbxMesh.AddPolygon(VertexOffset + section.indicies[j]);
}
fbxMesh.EndPolygon();
VertexOffset = VertexOffset + section.vertices.Count;
lMeshNode.AddMaterial(pScene, section.matName);
}
return(lMeshNode);
}