Enumerating pseudo-triangulations in the plane

  • Authors:
  • Sergey Bereg

  • Affiliations:
  • Department of Computer Science, University of Texas at Dallas, Box 830688, Richardson, TX

  • Venue:
  • Computational Geometry: Theory and Applications
  • Year:
  • 2005

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Abstract

A pseudo-triangle is a simple polygon with exactly three convex vertices. A pseudo-triangulation of a finite point set S in the plane is a partition of the convex hull of S into interior disjoint pseudo-triangles whose vertices are points of S. A pointed pseudo-triangulation is one which has the least number of pseudo-triangles. We study the graph G whose vertices represent the pointed pseudo-triangulations and whose edges represent flips. We present an algorithm for enumerating pointed pseudo-triangulations in O(log n) time per pseudo-triangulation.