Three dimensional euclidean Voronoi diagrams of lines with a fixed number of orientations

  • Authors:
  • Vladlen Koltun;Micha Sharir

  • Affiliations:
  • Tel Aviv University, Tel Aviv, Israel;Tel Aviv University, Tel Aviv, Israel and New York University, New York, NY

  • Venue:
  • Proceedings of the eighteenth annual symposium on Computational geometry
  • Year:
  • 2002

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Abstract

(MATH) We show that the combinatorial complexity of the Euclidean Voronoi diagram of n lines in $\reals3 that have at most c distinct orientations, is O(c 4 n 2+&egr;), for any &egr;0. This result is a step towards proving the long-standing conjecture that the Euclidean Voronoi diagram of lines in three dimensions has near-quadratic complexity. It provides the first natural instance in which this conjecture is shown to hold. In a broader context, our result adds a natural instance to the (rather small) pool of instances of general 3-dimensional Voronoi diagrams for which near-quadratic complexity bounds are known.