Technical Section: Collision detection using polar diagrams

  • Authors:
  • L. Ortega;F. Feito

  • Affiliations:
  • Universidad de Jaén. Campus "Las Lagunillas", Edif A4-138, 28071 Jaén, Spain;Universidad de Jaén. Campus "Las Lagunillas", Edif A4-138, 28071 Jaén, Spain

  • Venue:
  • Computers and Graphics
  • Year:
  • 2005

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Abstract

In computer graphics, collision detection is considered a key problem with important applications in related areas. Several solutions have been proposed, but independently of the chosen strategy, different stages of the solution are considered. It is not only relevant to apply a good static collision test, but reducing the pairs of objects susceptible of intersecting is important for a real-time response. Some methods achieve this aim computing a tessellation as preprocessing. The new approach we propose in this paper computes a partition of the plane with similar features to those of the Voronoi Diagram, but changing the Euclidean distance criterion for the minimal polar angle. The result is a new tessellation called polar diagram, in which every object in the scene is owner of a polar region as the locus of points with some common angle properties. Polar diagrams used as preprocessing can be applied to collision detection and many other geometric problems where the solution can be given by angle processing.