Smoothing shifts mesh coordinates

[NikDrummond]

I've noticed that mesh smoothing seems to shift the mesh in space:

mesh = trimesh.load_mesh('../mesh.stl')
mesh2 = mesh.copy()
mesh2 = trimesh.smoothing.filter_laplacian(mesh2)


scene = trimesh.Scene([mesh,mesh2])
scene.show()

Where I would think these meshes should be overlapping. The results are the same for trimesh.smoothing.filter_taubin() and trimesh.smoothing.filter_humphrey()

[mikedh]

Yeah just looking quickly there's a number of operations that look like they'd produce offsets, like here where it's just multiplying by a scaling factor. I think that logic should probably be something like ((vertices - center_mass) * scale) + center_mass

[postnubilaphoebus]

Hi @mikedh, thanks again for this awesome library with so many functionalities, looks like a lot of work! Is there an update on the shifting of coordinates in space? The problem is still happening.