Binary space partitions for 3D subdivisions

  • Authors:
  • John Hershberger;Subhash Suri

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

  • Venue:
  • SODA '03 Proceedings of the fourteenth annual ACM-SIAM symposium on Discrete algorithms
  • Year:
  • 2003

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Abstract

We consider the following question: Given a subdivision of space into n convex polyhedral cells, what is the worst-case complexity of a binary space partition (BSP) for the subdivision? We show that if the subdivision is rectangular and axis-aligned, then the worstcase complexity of an axis-aligned BSP is Ω(n4/3) and O(nα log2 n), where α = 1 + log2(4/3 ) = 1.4150375 .... By contrast, it is known that the BSP of a collection of n rectangular cells not forming a subdivision has worstcase complexity Θ(n3/2). We also show that the worstcase complexity of a BSP for a general convex polyhedral subdivision of total complexity O(n) is Ω(n3/2).