C# Accessing UV information in MNMesh

[Anonymous]

Hi,

  I am having some difficulty figuring out how to access UV information in an MNMesh.  I have the following code:

IMNMapFace fmap = f_map.F(faceIdx);

When I try to get the Vertex array in the fmap I am running into trouble.  According to the SDK, the following returns an IntPtr to the array

IPoint3 uvert = f_map.V(the_fmap.Tv[0]);

My problem is the_fmap.Tv portion.  I can't figure out how to get the array of UVs used in the Mapface.

I have tried other routes to access the data including MNMesh.Mv but this can sometimes return the wrong data is the UV is shared among several faces in different locations in the UV map.  Basically my C# skills are not good enough to figure out how to access this data.

Does anyone have any tips or a code snippet that shows how to do this?

Thanks

Todd

[Anonymous · Accepted solution]

If anyone is curious, a co-worker helped me figure out how to do this.  The below code will retrieve the proper UV Verts.  In our case we only need the first, second, and last if you are curious as to why I'm grabbing only three.

                                        IMNMapFace the_fmap = themesh.Mf(tmap.MapChannel,faceIdx);
					// Find the pointer to the List of map vertices for this face.
					IntPtr tt = the_fmap.Tv;
					// find the number of map verts and make an integer array.
					int[] mapverts = new int[the_fmap.Deg];
					// populate the array with the true map verts
					for (int i = 0; i <= the_fmap.Deg - 1; i++)
					{
						IntPtr newptr = IntPtr.Add(tt, i * sizeof(Int32));
						mapverts[i] = System.Runtime.InteropServices.Marshal.ReadInt32(newptr);
					}
					// create a piont for each map vert using the array.
					IPoint3 uvert1 = f_map.V(mapverts[0]);
					IPoint3 uvert2 = f_map.V(mapverts[1]);
					IPoint3 uvert3 = f_map.V(mapverts[mapverts.Length - 1])

[Anonymous]

In case anyone was curious, a co-worker helped me solve this issue.  The below code will retrieve the UV indices I was looking for.

                                        IMNMapFace the_fmap = themesh.Mf(tmap.MapChannel,faceIdx);
					// Find the pointer to the List of map vertices for this face.
					IntPtr tt = the_fmap.Tv;
					// find the number of map verts and make an integer array.
					int[] mapverts = new int[the_fmap.Deg];
					// populate the array with the true map verts
					for (int i = 0; i <= the_fmap.Deg - 1; i++)
					{
						IntPtr newptr = IntPtr.Add(tt, i * sizeof(Int32));
						mapverts[i] = System.Runtime.InteropServices.Marshal.ReadInt32(newptr);
					}
					// create a piont for each map vert using the array.
					IPoint3 uvert1 = f_map.V(mapverts[0]);
					IPoint3 uvert2 = f_map.V(mapverts[1]);
					IPoint3 uvert3 = f_map.V(mapverts[mapverts.Length - 1]);