Transforming pseudo-triangulations

  • Authors:
  • Sergey Bereg

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

  • Venue:
  • Information Processing Letters
  • Year:
  • 2004

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Abstract

We study the problem of transforming pseudo-triangulations in the plane. We show that a pseudo-triangulation with n vertices can be transformed into another one using O(n logn) flips only. This improves the previous bound O(n2) of Brönnimann et al. [Fall Workshop on Comput. Geometry, 2001]. We present an algorithm for computing a transformation between two pseudotriangulations in O((f + n) log n) time where f is the number of flips.