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On Bend-Minimized Orthogonal Drawings of Planar 3-Graphs

Authors Yi-Jun Chang, Hsu-Chun Yen

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Yi-Jun Chang
Hsu-Chun Yen

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Yi-Jun Chang and Hsu-Chun Yen. On Bend-Minimized Orthogonal Drawings of Planar 3-Graphs. In 33rd International Symposium on Computational Geometry (SoCG 2017). Leibniz International Proceedings in Informatics (LIPIcs), Volume 77, pp. 29:1-29:15, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2017)
https://doi.org/10.4230/LIPIcs.SoCG.2017.29

Abstract

An orthogonal drawing of a graph is a planar drawing where each edge is drawn as a sequence of horizontal and vertical line segments. Finding a bend-minimized orthogonal drawing of a planar graph of maximum degree 4 is NP-hard. The problem becomes tractable for planar graphs of maximum degree 3, and the fastest known algorithm takes O(n^5 log n) time. Whether a faster algorithm exists has been a long-standing open problem in graph drawing. In this paper we present an algorithm that takes only O~(n^{17/7}) time, which is a significant improvement over the previous state of the art.
Keywords
  • Bend minimization
  • graph drawing
  • orthogonal drawing
  • planar graph

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