Approximate Euclidean shortest path in 3-space

  • Authors:
  • Joonsoo Choi;Jürgen Sellen;Chee-Keng Yap

  • Affiliations:
  • Courant Institute of Mathematical Sciences, New York University;Courant Institute of Mathematical Sciences, New York University;Courant Institute of Mathematical Sciences, New York University

  • Venue:
  • SCG '94 Proceedings of the tenth annual symposium on Computational geometry
  • Year:
  • 1994

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Abstract

Papadimitriou's approximation approach to the Euclidean shortest path (ESP) problem in 3-space is revisited. As this problem is NP-hard, his approach represents an important step towards practical algorithms. Unfortunately, there are non-trivial gaps in the original description. Besides giving a complete treatment, we also give an alternative to his subdivision method which has some nice properties. Among the tools needed are root-separation bounds and non-trivial applications of Brent's complexity bounds on evaluation of elementary functions using floating point numbers.