Drawings of planar graphs with few slopes and segments

  • Authors:
  • Vida Dujmović;David Eppstein;Matthew Suderman;David R. Wood

  • Affiliations:
  • Department of Mathematics and Statistics, McGill University, Montréal, Canada;Department of Computer Science, University of California, Irvine, California, USA;McGill Centre for Bioinformatics, School of Computer Science, McGill University, Montréal, Canada;Departament de Matemàtica Aplicada II, Universitat Politècnica de Catalunya, Barcelona, Spain

  • Venue:
  • Computational Geometry: Theory and Applications
  • Year:
  • 2007

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Abstract

We study straight-line drawings of planar graphs with few segments and few slopes. Optimal results are obtained for all trees. Tight bounds are obtained for outerplanar graphs, 2-trees, and planar 3-trees. We prove that every 3-connected plane graph on n vertices has a plane drawing with at most segments and at most 2n slopes. We prove that every cubic 3-connected plane graph has a plane drawing with three slopes (and three bends on the outerface). In a companion paper, drawings of non-planar graphs with few slopes are also considered.