3-Dimensional Euclidean Voronoi Diagrams of Lines with a Fixed Number of Orientations

  • Authors:
  • Vladlen Koltun;Micha Sharir

  • Affiliations:
  • -;-

  • Venue:
  • SIAM Journal on Computing
  • Year:
  • 2003

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Abstract

We show that the combinatorial complexity of the Euclidean Voronoi diagram of $n$ lines in $\mathbb{R}^3$ that have at most c distinct orientations is $O(c^3n^{2+\varepsilon})$ for any $\varepsilon0$. This result is a step toward 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.