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3D ELVIRA MIR #1535

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3D ELVIRA MIR #1535

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BradWhitlock
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@BradWhitlock BradWhitlock commented Apr 3, 2025

This PR extends the axom::mir::ElviraAlgorithm class with support for 3D structured meshes. The algorithm operates as before in 2D but when it clips, it makes polyhedra and uses them to compute volumes. Polyhedral fragments are clipped off of mixed material zones according to planes that are determined for each material in the zone. The fragments are consolidated into a new Blueprint unstructured topology and a new matset is created for the resulting clean zones. Filters were added to improve the generated polyhedral topology so like points and faces are merged. The updated algorithm is tested via new CI programs that test ELVIRA 3D and some of the helper filter algorithms. The test infrastructure was also improved.

  • I'll fix the RELEASE-NOTES.md file when develop is updated. I'll make a new item for 3D ELVIRA.
  • The algorithm performance is okay but could be improved later.

…nhanced Polyhedra so it is easier to get faces. Added more clip routines for polyhedra.
…ot providing good results for one of its datasets.
…inally, I change the serial algorithm so it better matches the base algorithm.
…to make it achievable when making fragments.
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