Comments (2)
Hey, I think it depends on exactly what you're looking for, but to find "is a vertex only included in edges that occur exactly twice" it's pretty easy to use boolean masks to get those:
In [1]: import trimesh
In [2]: import numpy as np
In [3]: m = trimesh.load('models/rabbit.obj')
In [4]: m.is_watertight
Out[4]: False
In [5]: edges_ok = trimesh.grouping.group_rows(m.edges_sorted, require_count=2).ravel()
In [8]: vertices_ok = np.zeros(len(m.vertices), dtype=bool)
In [9]: vertices_ok[m.edges_sorted[edges_ok].ravel()] = True
In [10]: vertices_ok.all()
Out[10]: False
# these are indices of vertices that are "bad"
In [12]: np.nonzero(~vertices_ok)[0]
Out[12]: array([ 16, 77, 341, 364])
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and the vertices that occur in 2 triangle fans like in the example shown here, I think the above wouldn't cover the case ? E.g
from trimesh.
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