Abstract
Let a planar graph G=(V,E) and a vertex-partition V=A ∪ B be given. Can we draw G without edge crossings such that the partition is clearly visible? Such drawings aid to display partitions and cuts as they arise in various applications. In this paper, we study planar drawings of G in which the vertex classes A and B are separated by a horizontal line (so-called HH-drawings). We provide necessary and sufficient conditions for the existence of so-called y-monotone planar HH-drawings, and a linear time algorithm to construct, if possible, a y-monotone planar HH-drawing of area \({\cal O}(\vert V\vert^2)\) with few bends. Furthermore, we give an exponential lower bound for the area of straight-line planar HH-drawings. Finally, we study planar HH-drawings that are not y-monotone.
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Biedl, T., Kaufmann, M., Mutzel, P. (1998). Drawing Planar Partitions II: HH-Drawings. In: Hromkovič, J., Sýkora, O. (eds) Graph-Theoretic Concepts in Computer Science. WG 1998. Lecture Notes in Computer Science, vol 1517. Springer, Berlin, Heidelberg. https://doi.org/10.1007/10692760_11
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DOI: https://doi.org/10.1007/10692760_11
Publisher Name: Springer, Berlin, Heidelberg
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