public bool SetPositionVertices(IMesh maxMesh, MyMesh myMesh)
{
bool countChanged = false;
if (maxMesh.NumVerts != myMesh.NumVertices)
{
maxMesh.SetNumVerts(myMesh.NumVertices, false, false);
countChanged = true;
}
IPoint3 p3 = maxMesh.GetVertPtr(0);
Marshal.Copy(myMesh.Vertices.ToArray(), 0, p3.NativePointer, myMesh.NumVertices * 3);
return countChanged;
}
protected unsafe TriMeshFacesAndPositions GetTriMeshFacesAndPositions(IMesh mesh)
{
VertexChannel channel = new VertexChannel();
channel.m_type = VertexChannelType.Positions;
channel.m_vertices = new Point3[mesh.NumVerts];
fixed (Point3* vertexData = channel.m_vertices)
{
CopyMemory((IntPtr)vertexData, mesh.GetVertPtr(0).Handle, (uint)(sizeof(Point3) * mesh.NumVerts));
}
var faces = new Face[mesh.NumFaces];
fixed (Face* faceData = faces)
{
CopyMemory((IntPtr)faceData, mesh.Faces[0].Handle, (uint)(sizeof(Face) * mesh.NumFaces));
}
/* Split the face data into seperate arrays. Put the face indices in one with the channel, the others to one side to filter into groups later if the user wants */
TriMeshFacesAndPositions faces_data = new TriMeshFacesAndPositions();
faces_data.face_flags = new short[faces.Length];
faces_data.face_materialIds = new short[faces.Length];
channel.m_faces = new Indices3[faces.Length];
for (int i = 0; i < faces.Length; i++)
{
short materialid = (short)((faces[i].flags & 0xFFFF0000) >> 16); //in Max the high word of the flags member contains the material id.
short flags = (short)(faces[i].flags & 0x0000FFFF);
faces_data.face_flags[i] = flags;
faces_data.face_materialIds[i] = materialid;
channel.m_faces[i] = faces[i].v;
}
faces_data.positions_channel = channel;
return faces_data;
}