How can I transform a 2D mesh to 3D?

Question

I know practically nothing about meshes, so I was wondering whether it's possible in Mathematica to convert a 2D mesh, embedded in 3 dimensions, to a 3D mesh? The 2D mesh was generated by a CAD program in STL format.

How you get the full mesh, also depends a bit on what you want to do with it later? — user21, Feb 12 '24 at 06:10
I'm using it to compute mass properties (moments of inertia, center of gravity, mass). — Cassini, Feb 13 '24 at 00:22

score 6 · Accepted Answer · answered Feb 11 '24 at 20:10

6

If the 2D mesh is watertight, you can create a BoundaryMeshRegion from it and then call DiscretizeRegion on it. The result fills the region enclosed by the surface mesh with a tet-mesh.

Something like this should work:

R = DiscretizeRegion[Import["file.stl", "BoundaryMeshRegion"]]

answered Feb 11 '24 at 20:10

Henrik Schumacher

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@HenrikSchumacker Thank you--that totally worked. I had tried the "DiscretizeRegion" function, but I didn't import the region as a BoundaryMeshRegion and it didn't work. – Cassini Feb 11 '24 at 21:10
1

You're welcome! – Henrik Schumacher Feb 11 '24 at 21:52

How can I transform a 2D mesh to 3D?

1 Answers1