Cut holes in mesh
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Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 25/100
- Issue type
- Feature
- Clarity
- Mostly clear
- Activity status
- Stale
- Tech stack
- cpp
- Domain
- computer-graphics
Research direction
Start by reading the mesh construction logic in src/surface/manifold_surface_mesh.cpp around lines 48 and 154-161, then inspect SeparateEdge around lines 671 and 808-814. Reproduce the reported failures with a mesh containing an interior edge loop. Done means the library can represent the loop as a boundary or clearly documents the supported approach.
Written by the indexing model from the issue text.
Description
First of all, a huge thanks for creating this fantastic library!
I've been experimenting with GC inside of Rhino to work with modelling terrains. One thing I'm struggling with is cutting holes in the mesh. Consider this basic example:
Initial mesh:
Faces to remove:
Resulting mesh with a hole inside:
I tried several approaches:
- Omit the interior faces while constructing a new mesh:
https://github.com/nmwsharp/geometry-central/blob/ebe40292466517b2139f8f546688db278414e3bb/src/surface/manifold_surface_mesh.cpp#L48
This fails here:
https://github.com/nmwsharp/geometry-central/blob/ebe40292466517b2139f8f546688db278414e3bb/src/surface/manifold_surface_mesh.cpp#L154-L161
- Pass the edges defining the interior boundary to the SeparateEdge function
https://github.com/nmwsharp/geometry-central/blob/ebe40292466517b2139f8f546688db278414e3bb/src/surface/manifold_surface_mesh.cpp#L671
Which fails here;
https://github.com/nmwsharp/geometry-central/blob/ebe40292466517b2139f8f546688db278414e3bb/src/surface/manifold_surface_mesh.cpp#L808-L814
Is there a straight-forward way to define an edge loop as a boundary?
@nmwsharp, @MarkGillespie, @keenancrane
- Dominant language
- C++
- Stars
- 1.3k
- Forks
- 183
- PR merge metrics
- No merged PRs in 30d
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