`average_onto_vertices` only accepts 3-dim input

[Sentient07]

Hi,

As far as I understand, this function: https://libigl.github.io/libigl-python-bindings/igl_docs/#average_onto_vertices would be performing a matrix (incidence with voronoi weight?) vector multiplication. I don't understand why it's restricted to 3-dim input? It's not very clear from the doc, but when I would try a 4-dim input, I get the error, ValueError: Parameter s has invalid shape, expected s.shape = [13776, 3] but got s.shape = [13776, 4]

Shouldn't it accept any k-dim vector?

Thank you!

[alecjacobson]

Seems to be a bug here:

libigl-python-bindings/src/average_onto_vertices.cpp

Line 45 in 2516539

assert_shape_equals(s, f.rows(), v.cols(), "s");

Happy to merge a PR

[Sentient07]

Thank you! I'll try to send one soon :)