Interactive Display of Isosurfaces with Global Illumination

  • Authors:
  • Chris Wyman;Steven Parker;Peter Shirley;Charles Hansen

  • Affiliations:
  • IEEE;IEEE;-;IEEE

  • Venue:
  • IEEE Transactions on Visualization and Computer Graphics
  • Year:
  • 2006

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Abstract

In many applications, volumetric data sets are examined by displaying isosurfaces, surfaces where the data, or some function of the data, takes on a given value. Interactive applications typically use local lighting models to render such surfaces. This work introduces a method to precompute or lazily compute global illumination to improve interactive isosurface renderings. The precomputed illumination resides in a separate volume and includes direct light, shadows, and interreflections. Using this volume, interactive globally illuminated renderings of isosurfaces become feasible while still allowing dynamic manipulation of lighting, viewpoint and isovalue.