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Visibility of disjoint polygons

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Abstract

Consider a collection of disjoint polygons in the plane containing a total ofn edges. We show how to build, inO(n 2) time and space, a data structure from which inO(n) time we can compute the visibility polygon of a given point with respect to the polygon collection. As an application of this structure, the visibility graph of the given polygons can be constructed inO(n 2) time and space. This implies that the shortest path that connects two points in the plane and avoids the polygons in our collection can be computed inO(n 2) time, improving earlierO(n 2 logn) results.

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Author information

Authors and Affiliations

  1. Faculty of Science and Technology, Sophia University, 102, Tokyo, Japan

    Takao Asano

  2. Osaka Electro-Communication University, Neyagawa, 572, Osaka, Japan

    Tetsuo Asano

  3. Computer Science Department, Stanford University, 94305, Stanford, California, USA

    Leonidas Guibas & John Hershberger

  4. DEC Systems Research Center, 94301, Palo Alto, California, USA

    Leonidas Guibas

  5. Department of Mathematical Engineering and Instrumentation Physics, Faculty of Engineering, University of Tokyo, 113, Tokyo, Japan

    Hiroshi Imai

Authors
  1. Takao Asano
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  2. Tetsuo Asano
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  3. Leonidas Guibas
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  4. John Hershberger
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  5. Hiroshi Imai
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Additional information

Communicated by D. T. Lee.

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Asano, T., Asano, T., Guibas, L. et al. Visibility of disjoint polygons. Algorithmica 1, 49–63 (1986). https://doi.org/10.1007/BF01840436

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  • DOI: https://doi.org/10.1007/BF01840436

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