Shadow volume BSP trees for computation of shadows in dynamic scenes

  • Authors:
  • Yiorgos Chrysanthou;Mel Slater

  • Affiliations:
  • Department of Computer Science, QMW University of London, Mile End Road, London E1 4NS, UK;Department of Computer Science, QMW University of London, Mile End Road, London E1 4NS, UK

  • Venue:
  • I3D '95 Proceedings of the 1995 symposium on Interactive 3D graphics
  • Year:
  • 1995

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Abstract

This paper presents an algorithm for shadow calculation in dynamic polyhedral scenes illuminated by point light sources. It is based on a modification of Shadow Volume Binary Space Partition trees, to allow these to be constructed from the original scene polygons in arbitrary order and to support for fast reconstruction after a change in scene geometry. Timings using sample scenes are presented that indicate substantial savings both in terms of computation time and shadows produced.