ValueError: could not broadcast input array from shape (172,) into shape (344,) for certain mesh

[tianyyiii]

Thanks for your great work!
When I run segmentation on my customized meshes, for some mesh, it works without error. However, for some other meshes, I get the error

Traceback (most recent call last):
File "/home/jianfu/MeshCraft/SATR/scripts/single_dataset_example.py", line 18, in
segment(
File "/home/jianfu/MeshCraft/SATR/scripts/helper_functions.py", line 142, in segment
segmenter.set_mesh(mesh)
File "/home/jianfu/MeshCraft/SATR/meshseg/methods/segmentors.py", line 187, in set_mesh
self.compute_vertices_pairwise_dist()
File "/home/jianfu/MeshCraft/SATR/meshseg/methods/segmentors.py", line 276, in compute_vertices_pairwise_dist
self.vertices_distances[:, i] = x
ValueError: could not broadcast input array from shape (172,) into shape (344,)
How do I solve this?

[Samir55]

Hi @tianyyiii, thank you for reaching out! it seems that the mesh may have duplicate vertices. You may need to preprocess it using Meshlab or similar software.

[tianyyiii]

Thank you. It works!

[sizhe-wang]

I met the same problem. There may be another probability. So I record here and hope to be helpful.
I found this. This may be a bug of kaolin that if you import an obj mesh with color, the vertices in kaolin will contain RGB values. So that the mesh vertices may double.

I solved this by delete the color information of the obj mesh.