[Bug] AttributeError: module 'trimesh.voxel' has no attribute 'creation'

Trimesh version: 3.9.1

Hi. I discovered that trimesh reports the following error

AttributeError: module 'trimesh.voxel' has no attribute 'creation'

when trying to access the module. However, if a method from it is called, e.g.

m = trimesh.creation.box()
m.voxelized(pitch=.5)

then the module trimesh.voxel.creation can be correctly found by the program.

[ShunChengWu]

same here. able to solve this by import creation myself

from trimesh.voxel import creation

[chlongv]

My bad, it’s not exactly the same error, it’s rather related to trimesh.voxel.creation, but it looks very similar.

merlin@L-0219:/workspace$ python3
Python 3.10.6 (main, Nov  2 2022, 18:53:38) [GCC 11.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import trimesh
>>> mesh = trimesh.Trimesh()
>>> n = trimesh.voxel.creation.local_voxelize(mesh, (0, 0, 0), 0.0, 1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'trimesh.voxel' has no attribute 'creation'
>>> from trimesh.voxel import creation
>>> n = trimesh.voxel.creation.local_voxelize(mesh, (0, 0, 0), 0.0, 1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.10/dist-packages/trimesh/voxel/creation.py", line 120, in local_voxelize
    faces = list(mesh.triangles_tree.intersection(bounds))
  File "/usr/local/lib/python3.10/dist-packages/trimesh/caching.py", line 139, in get_cached
    value = function(*args, **kwargs)
  File "/usr/local/lib/python3.10/dist-packages/trimesh/base.py", line 797, in triangles_tree
    tree = triangles.bounds_tree(self.triangles)
  File "/usr/local/lib/python3.10/dist-packages/trimesh/triangles.py", line 344, in bounds_tree
    tree = util.bounds_tree(triangle_bounds)
  File "/usr/local/lib/python3.10/dist-packages/trimesh/util.py", line 1733, in bounds_tree
    import rtree
ModuleNotFoundError: No module named 'rtree'
>>> 

The call fails in the “working” (i.e. 2nd) case because the missing rtree dependency (as already reported by @alexge233), but we see that the first call fails because trimesh.voxel has no creation attribute.