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A Plane Sweep Algorithm for the Voronoi Tessellation of the Sphere
Xiaoyu Zheng
,Roland Ennis
,Gregory P. Richards
2,Peter Palffy-Muhoray
3
Department of Mathematical Sciences,Kent State University, Kent, OH 44242, USA
Pressco Technology, Inc, Cleveland, Ohio 44139, USA
2Deparment of Mathematical Sciences and Liquid Crystal Institute, Kent State University, Kent, Ohio 44242, USA
3Liquid Crystal Institute, Kent State University, Kent, Ohio, 44242, USA
We have extended Fortune's sweep-line algorithm for the construction Voronoi diagrams in
the plane to the surface of a sphere. Although the extension is straightforward, it requires
interesting modi¯cations. The main di®erence between the sweep line algorithms on plane and
on the sphere is that that the beach line on the sphere is a closed curve. We have implemented
this algorithm and tessellated spheres with up to one million sites. The running time for our
sweep line algorithm on the sphere is O(N logN), and the storage space is O(N).
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