edge_number() return 0 & edge_matrix() return empty

[CrescentRosexx]

I read a 'obj' file, and the face_matrix() and vertex_matrix() return correct data, but when I using edge_number() I got 0, edge_matrix() also returns an empty list.
It seems that the two functions have not been implemented?

[alemuntoni]

As already mentioned here, the Edge Matrix in VCGLib, MeshLab and PyMeshLab is not related and has nothing to do with the the mesh faces.
Edges are other elements that could be computed using some filters, or added manually. This aspect will be better specified in the documentation for the next version of pymeshlab.

If you need a list of the edges composing the faces of the mesh, you'll have to generate it by yourself starting from the face_matrix().

[CrescentRosexx]

As already mentioned here, the Edge Matrix in VCGLib, MeshLab and PyMeshLab is not related and has nothing to do with the the mesh faces. Edges are other elements that could be computed using some filters, or added manually. This aspect will be better specified in the documentation for the next version of pymeshlab.

If you need a list of the edges composing the faces of the mesh, you'll have to generate it by yourself starting from the face_matrix().

I got it, thank you for your reply!