Method, computer graphics image rendering system and computer-readable data storage medium for computing of indirect illumination in a computer graphics image of a scene
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United States of America Patent
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Sep 24, 2013
Grant Date -
Jan 20, 2011
app pub date -
Jun 29, 2010
filing date -
Jun 29, 2009
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Abstract
Method for real-time computing of indirect illumination in a computer graphics image of a scene, comprising: defining a light propagation volume as a three-dimensional grid consisting of a plurality of grid cells; allocating a plurality of secondary light sources to grid cells of said light propagation volume; accumulating directional, colored irradiance contributions of all secondary light sources in a respective grid cell and repeating this step of accumulating for all grid cells of the light propagation volume to thereby obtain an initial indirect light intensity distribution. The propagation of light in said light propagation volume is then iteratively computed starting with the initial indirect light intensity to obtain a final indirect light intensity distribution, which is used for rendering the scene illuminated by the final indirect light intensity distribution during a usual scene rendering process from a camera's point of view.
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