The zonal method for calculating light intensities in the presence of a participating medium

  • Authors:
  • Holly E. Rushmeier;Kenneth E. Torrance

  • Affiliations:
  • Cornell Univ., Ithaca, NY;Cornell Univ., Ithaca, NY

  • Venue:
  • SIGGRAPH '87 Proceedings of the 14th annual conference on Computer graphics and interactive techniques
  • Year:
  • 1987

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Abstract

The zonal method for calculating radiative transfer in the presence of a participating medium is applied to the generation of realistic synthetic images. The method generalizes the radiosity method and allows for emission, scattering, and absorption by a participating medium. The zonal method accounts for volume/surface interactions which have not been previously included, as well as volume/volume and surface/surface interactions. In addition, new algorithms, based on the hemi-cube formulation, are introduced for calculating the geometric factors required by the zonal method.