Obtuse triangle suppression in anisotropic meshes

  • Authors:
  • Feng Sun;Yi-King Choi;Wenping Wang;Dong-Ming Yan;Yang Liu;Bruno Lévy

  • Affiliations:
  • Department of Computer Science, The University of Hong Kong, Pokfulam Road, Hong Kong, China;Department of Computer Science, The University of Hong Kong, Pokfulam Road, Hong Kong, China;Department of Computer Science, The University of Hong Kong, Pokfulam Road, Hong Kong, China;Department of Computer Science, The University of Hong Kong, Pokfulam Road, Hong Kong, China and LORIA/INRIA Lorraine, Project ALICE, Campus scientifique 615, rue du Jardin Botanique, 54600, Ville ...;LORIA/INRIA Lorraine, Project ALICE, Campus scientifique 615, rue du Jardin Botanique, 54600, Villers les Nancy, France and Microsoft Research Asia, 5/F, Beijing Sigma Center, No. 49, Zhichun Road ...;LORIA/INRIA Lorraine, Project ALICE, Campus scientifique 615, rue du Jardin Botanique, 54600, Villers les Nancy, France

  • Venue:
  • Computer Aided Geometric Design
  • Year:
  • 2011

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Abstract

Anisotropic triangle meshes are used for efficient approximation of surfaces and flow data in finite element analysis, and in these applications it is desirable to have as few obtuse triangles as possible to reduce the discretization error. We present a variational approach to suppressing obtuse triangles in anisotropic meshes. Specifically, we introduce a hexagonal Minkowski metric, which is sensitive to triangle orientation, to give a new formulation of the centroidal Voronoi tessellation (CVT) method. Furthermore, we prove several relevant properties of the CVT method with the newly introduced metric. Experiments show that our algorithm produces anisotropic meshes with much fewer obtuse triangles than using existing methods while maintaining mesh anisotropy.