Binary space partitions of orthogonal subdivisions

  • Authors:
  • John Hershberger;Subhash Suri;Csaba D. Toth

  • Affiliations:
  • Mentor Graphics Corp., Wilsonville, OR;University of California, Santa Barbara, CA;University of California, Santa Barbara, CA

  • Venue:
  • SCG '04 Proceedings of the twentieth annual symposium on Computational geometry
  • Year:
  • 2004

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Abstract

We consider the problem of constructing binary space partitions (BSPs) for orthogonal subdivisions (space filling packings of boxes) in d-space. We show that a subdivision with n boxes can be refined into a BSP of size O(n d+1/3), for all d ≥ 3, and that such a partition can be computed in time O(K log n), where K is the size of the BSP produced. Our upper bound on the BSP size is tight for 3-dimensional subdivisions in higher dimensions, this is the first nontrivial result for general full-dimensional boxes. We also present a lower bound construction for a subdivision of n boxes in d-space that requires a BSP of size Ω(n946;(d)), where β(d) converges to (1+ √5 )/2 as d → ∞.