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DOI: 10.4230/LIPIcs.ISAAC.2021.11

Illuminating the x-Axis by α-Floodlights

Authors: Bengt J. Nilsson, David Orden, Leonidas Palios, Carlos Seara, and Paweł Żyliński

Published in: LIPIcs, Volume 212, 32nd International Symposium on Algorithms and Computation (ISAAC 2021)

Abstract

Given a set S of regions with piece-wise linear boundary and a positive angle α < 90°, we consider the problem of computing the locations and orientations of the minimum number of α-floodlights positioned at points in S which suffice to illuminate the entire x-axis. We show that the problem can be solved in O(n log n) time and O(n) space, where n is the number of vertices of the set S.

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Bengt J. Nilsson, David Orden, Leonidas Palios, Carlos Seara, and Paweł Żyliński. Illuminating the x-Axis by α-Floodlights. In 32nd International Symposium on Algorithms and Computation (ISAAC 2021). Leibniz International Proceedings in Informatics (LIPIcs), Volume 212, pp. 11:1-11:12, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021)

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@InProceedings{nilsson_et_al:LIPIcs.ISAAC.2021.11,
  author =	{Nilsson, Bengt J. and Orden, David and Palios, Leonidas and Seara, Carlos and \.{Z}yli\'{n}ski, Pawe{\l}},
  title =	{{Illuminating the x-Axis by \alpha-Floodlights}},
  booktitle =	{32nd International Symposium on Algorithms and Computation (ISAAC 2021)},
  pages =	{11:1--11:12},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-214-3},
  ISSN =	{1868-8969},
  year =	{2021},
  volume =	{212},
  editor =	{Ahn, Hee-Kap and Sadakane, Kunihiko},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops-dev.dagstuhl.de/entities/document/10.4230/LIPIcs.ISAAC.2021.11},
  URN =		{urn:nbn:de:0030-drops-154444},
  doi =		{10.4230/LIPIcs.ISAAC.2021.11},
  annote =	{Keywords: Computational Geometry, Visibility, Art Gallery Problems, Floodlights}
}

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Illuminating the x-Axis by α-Floodlights

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