Dynamic Planar Convex Hull with Optimal Query Time

  • Authors:
  • Gerth Stølting Brodal;Riko Jacob

  • Affiliations:
  • -;-

  • Venue:
  • SWAT '00 Proceedings of the 7th Scandinavian Workshop on Algorithm Theory
  • Year:
  • 2000

Quantified Score

Hi-index 0.00

Visualization

Abstract

The dynamic maintenance of the convex hull of a set of points in the plane is one of the most important problems in computational geometry. We present a data structure supporting point insertions in amortized O(log n ċ log log log n) time, point deletions in amortized O(log n ċ log log n) time, and various queries about the convex hull in optimal O(log n) worst-case time. The data structure requires O(n) space. Applications of the new dynamic convex hull data structure are improved deterministic algorithms for the k-level problem and the redblue segment intersection problem where all red and all blue segments are connected.