Sliver removal by lattice refinement

  • Authors:
  • François Labelle

  • Affiliations:
  • University of California at Berkeley, Berkeley, CA

  • Venue:
  • Proceedings of the twenty-second annual symposium on Computational geometry
  • Year:
  • 2006

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Abstract

I present an algorithm that can provably eliminate slivers in the interior of a tetrahedral mesh, leaving only tetrahedra with dihedral angles between 30 and 135 degrees and radius-edge ratios of at most 1.368, except near the boundary. In comparison, previous bounds on dihedral angles were microscopic. The final mesh can respect specified input vertices and a user-defined sizing function. The algorithm comes with a bound on the sizes of the features it creates, and can provably grade from small to large tetrahedra.