Drawing Planar Cubic 3-Connected Graphs with Few Segments: Algorithms and Experiments

Igamberdiev, Alexander and Meulemans, Wouter and Schulz, André (2015) Drawing Planar Cubic 3-Connected Graphs with Few Segments: Algorithms and Experiments. In: Graph Drawing and Network Visualization: 23rd International Symposium, GD 2015, September 24-26, 2015, Los Angeles, CA, USA , pp. 113-124 (Official URL: http://dx.doi.org/10.1007/978-3-319-27261-0_10).

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A drawing of a graph can be understood as an arrangement of geometric objects. In the most natural setting the arrangement is formed by straight-line segments. Every cubic planar 3-connected graph with n vertices has such a drawing with only n/2 +3 segments, matching the lower bound. This result is due to Mondal et al. [J. of Comb. Opt., 25], who gave an algorithm for constructing such drawings. We introduce two new algorithms that also produce drawings with n/2+3 segments. One algorithm is based on a sequence of dual edge contractions, the other is based on a recursion of nested cycles. We also show a flaw in the algorithm of Mondal et al. and present a fix for it. We then compare the performance of these three algorithms by measuring angular resolution, edge length and face aspect ratio of the constructed drawings. We observe that the corrected algorithm of Mondal et al. mostly outperforms the other algorithms, especially in terms of angular resolution. However, the new algorithms perform better in terms of edge length and minimal face aspect ratio.

Item Type:Conference Paper
Classifications:M Methods > M.300 Dynamic / Incremental / Online
P Styles > P.540 Planar
P Styles > P.720 Straight-line
ID Code:1482

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