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Journal Articles International Journal of Foundations of Computer Science Year : 2002

The Delaunay Hierarchy

Olivier Devillers

Abstract

We propose a new data structure to compute the Delaunay triangulation of a set of points in the plane. It combines good worst case complexity, fast behavior on real data, small memory occupation and the possibility of fully dynamic insertions and deletions. The location structure is organized into several levels. The lowest level just consists of the triangulation, then each level contains the triangulation of a small sample of the level below. Point location is done by walking in a triangulation to determine the nearest neighbor of the query at that level, then the walk restarts from that neighbor at the level below. Using a small subset (3%) to sample a level allows a small memory occupation; the walk and the use of the nearest neighbor to change levels quickly locate the query.
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Dates and versions

inria-00166711 , version 1 (08-08-2007)

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Olivier Devillers. The Delaunay Hierarchy. International Journal of Foundations of Computer Science, 2002, 13, pp.163-180. ⟨10.1142/S0129054102001035⟩. ⟨inria-00166711⟩
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