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Interactive display of isosurfaces with global illumination

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4 Author(s)
C. Wyman ; Iowa Univ., Iowa City, IA, USA ; S. Parker ; P. Shirley ; C. Hansen

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 precompiled illumination resides in a separate volume and includes direct light, shadows, and intersections. Using this volume, interactive globally illuminated renderings of isosurfaces become feasible while still allowing dynamic manipulation of lighting, viewpoint and isovalue.

Published in:

IEEE Transactions on Visualization and Computer Graphics  (Volume:12 ,  Issue: 2 )