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Visibility between two edges of a simple polygon

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Abstract

One of the most recurring themes in many computer applications such as graphics automated cartography, image processing and robotics is the notion of visibility. We are concerned with the visibility between two edges of a simplen-vertex polygon. Four natural definitions of edge-to-edge visibility are proposed. There existO(nlogn) algorithms and complicatedO(nlog logn) algorithms to solve this problem partially and indirectly. A linear running time, and thus optimal algorithm is presented to determine edge-to-edge visibility under any of the four definitions. This simple, efficient, and direct algorithm without computing the triangulation of the simple polygon also identifies the visibility region if it exists.

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Authors and Affiliations

  1. School of Computer Science, McGill University, 805 Sherbrooke St. W., H3A 2K6, Montreal, Canada

    David Avis, Teren Gum & Godfried Toussaint

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  1. David Avis
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  2. Teren Gum
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  3. Godfried Toussaint
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Avis, D., Gum, T. & Toussaint, G. Visibility between two edges of a simple polygon. The Visual Computer 2, 342–357 (1986). https://doi.org/10.1007/BF01952419

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