How to Convert Wedge UV Coordinates to PyTorch3D faces_uv?

[blacksino]

Hi everyone,

I am working with PyMeshLab and reading a mesh that includes wedge texture coordinates, which gives me the UV coordinates for each vertex of a face in the shape of (F x 3) x 2. I need to convert this into the format required by PyTorch3D, where the faces_uv stores indices relative to the verts_uv. This means that instead of storing actual UV coordinates for each face, I need to store indices pointing to the unique UV coordinates (verts_uv).

The conversion process involves deduplication of the UV coordinates and creating an index lookup, but this deduplication can be quite slow for large meshes.

I have tried using np.unique, but I’m looking for a more efficient way to perform this operation.
Any help would be appreciated. Thanks!

[jmespadero]

Have you tried the compute_texcoord_transfer_wedge_to_vertex filter?
It should do what you weed, including splitting vertices with not coherent Wedge coordinates, quite fast.