Wrap Trimesh

[akaszynski]

Wrap Trimesh

Given a few issues that have demonstrated the use of (or mentioned problems with) trimesh, I thought it was time that we wrapped trimesh.Trimesh instances. See issue #966. For example:

import trimesh
points = [[0, 0, 0], [0, 0, 1], [0, 1, 0]]
faces = [[0, 1, 2]]
tmesh = trimesh.Trimesh(points, faces=faces, process=False)
mesh = pv.wrap(tmesh)

I did some tests and the wrap is quite fast as it only generates a new faces array, which you can do fairly quickly. For those users used to trimesh, this means that we can now plot those mesh types with pyvista.plot(tmesh).

I've also taken the liberty to update codespell and pydocstyle since our versions are old and updating them didn't introduce any additional spelling or style changes.

[codecov]

Codecov Report

Merging #970 into master will increase coverage by 0.32%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #970      +/-   ##
==========================================
+ Coverage   86.79%   87.12%   +0.32%     
==========================================
  Files          36       36              
  Lines        9112     9357     +245     
==========================================
+ Hits         7909     8152     +243     
- Misses       1203     1205       +2     

[darikg]

re #966, I was thinking it'd be convenient just in general to have the PolyData constructor assume that a two-dimensional faces array implies that every face has the same number of vertices, viz. the number of columns. Not sure how to handle backwards compatibility though -- an alternative static constructor like PolyData.from_faces_array(verts, faces) maybe?

[banesullivan]

I was thinking it'd be convenient just in general to have the PolyData constructor assume that a two-dimensional faces array implies that every face has the same number of vertices, viz. the number of columns. ...

I agree that would be useful. It seems the cell types in the faces array throws folks off quite frequently. I could try implementing this support while maintaining backward compatibility.

[banesullivan]

Awesome work!