The complexity of geodesic Voronoi diagrams on triangulated 2-manifold surfaces

Abstract

We study the combinatorial complexity of Voronoi diagram of point sites on a general triangulated 2-manifold surface, based on the geodesic metric. Given a triangulated 2-manifold T of n faces and a set of m point sites S={s1,s2,…,sm}∈T, we prove that the complexity of Voronoi diagram VT(S) of S on T is O(mn) if the genus of T is zero. For a genus-g manifold T in which the samples in S are dense enough and the resulting Voronoi diagram satisfies the closed ball property, we prove that the complexity of Voronoi diagram VT(S) is O((m+g)n).