December 2012
Intermediate to advanced
631 pages
13h 10m
English
Content preview from Graphics Gems III (IBM Version)
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VI. II
ACCURATE FORM-FACTOR COMPUTATION
Filippo Tampieri, Cornell University, Ithaca, New York
Publisher Summary
The radiosity method for diffuse environments expresses the energy transfer between a source patch and a receiving patch. Lying at the core of the radiosity formulation, the accurate computation of form factors plays an important role in determining the quality of the radiosity solution. This chapter presents a simple algorithm for the computation of accurate form factors. The algorithm computes the form factor between a finite-area polygonal source and a differential area on a receiving patch and can be used directly within the progressive refinement radiosity method. When partial occlusion occurs, approximating the visibility ...
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