A new approximation algorithm for bend minimization in the Kandinsky model

  • Authors:
  • Wilhelm Barth;Petra Mutzel;Canan Yildiz

  • Affiliations:
  • Institute of Computer Graphics and Algorithms, Vienna University of Technology, Wien, Austria;Department of Computer Science, University of Dortmund, Dortmund, Germany;Institute of Computer Graphics and Algorithms, Vienna University of Technology, Wien, Austria

  • Venue:
  • GD'06 Proceedings of the 14th international conference on Graph drawing
  • Year:
  • 2006

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Abstract

The Kandinsky model has been introduced by Fößmeier and Kaufmann in order to deal with planar orthogonal drawings of planar graphs with maximal vertex degree higher than four [7]. No polynomial-time algorithm is known for computing a (region preserving) bend minimal Kandinsky drawing. In this paper we suggest a new 2-approximation algorithm for this problem. Our extensive computational experiments [13] show that the quality of the computed solutions is better than those of its predecessors [6]. E.g., for all instances in the Rome graph benchmark library [4] it computed the optimal solution, and for randomly generated triangulated graphs with up to 800 vertices, the absolute error was less than 2 on average.