Photon Radiosity Lightmaps for CSG Solids

Information

  • Publication Type: Technical Report
  • Workgroup(s)/Project(s): not specified
  • Date: September 1997
  • Number: TR-186-2-97-19
  • Keywords: CSG, functional radiosity, stochastic radiosity, lightmaps

Abstract

We propose a technique that enables one to exploit the inherent ability of stochastic radiosity algorithms to work correctly in the presence of arbitrary CSG intersections. With such radiosity algorithms the common approach to storing the illumination over a surface is to attach so--called {\em lightmaps} to them. By suitably splitting those lightmap elements at set--up time that are partitioned in some way by CSG intersections, we create an environment where a photon simulation can be performed without any modifications to the algorithm and little run--time penalty.

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BibTeX

@techreport{Wilkie-1997-PRL,
  title =      "Photon Radiosity Lightmaps for CSG Solids",
  author =     "Alexander Wilkie and Robert F. Tobler and Werner Purgathofer",
  year =       "1997",
  abstract =   "We propose a technique that enables one to exploit the
               inherent ability of stochastic radiosity algorithms to work
               correctly in the presence of arbitrary CSG intersections.
               With such radiosity algorithms the common approach to
               storing the illumination over a surface is to attach
               so--called {\em lightmaps} to them. By suitably splitting
               those lightmap elements at set--up time that are partitioned
               in some way by CSG intersections, we create an environment
               where a photon simulation can be performed without any
               modifications to the algorithm and little run--time penalty.",
  month =      sep,
  number =     "TR-186-2-97-19",
  address =    "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria",
  institution = "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology ",
  note =       "human contact: technical-report@cg.tuwien.ac.at",
  keywords =   "CSG, functional radiosity, stochastic radiosity, lightmaps",
  URL =        "https://www.cg.tuwien.ac.at/research/publications/1997/Wilkie-1997-PRL/",
}