A Linear Bound on the Complexity of the Delaunay Triangulation of Points on Polyhedral Surfaces

  • Authors:
  • Dominique Attali;Jean-Daniel Boissonnat

  • Affiliations:
  • LIS, ENSIEG, Domaine Universitaire, BP 46, 38402 Saint Martin d’Hères Cedex, France;INRIA, Unité de Recherche Sophia Antipolis, 2004 Route des Lucioles, BP 93, 06904 Sophia-Antipolis, France

  • Venue:
  • Discrete & Computational Geometry
  • Year:
  • 2004

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Abstract

Delaunay triangulations and Voronoi diagrams have found numerous applications in surface modeling, surface mesh generation, deformable surface modeling and surface reconstruction. Many algorithms in these applications begin by constructing the three-dimensional Delaunay triangulation of a finite set of points scattered over a surface. Their running-time therefore depends on the complexity of the Delaunay triangulation of such point sets.Although the complexity of the Delaunay triangulation of points in R3 may be quadratic in the worst case, we show in this paper that it is only linear when the points are distributed on a fixed set of well-sampled facets of R3 (e.g. the planar polygons in a polyhedron). Our bound is deterministic and the constants are explicitly given.