Using the visibility complex for radiosity computation

Rachel Orti 1 Frédo Durand 1 Stéphane Rivière 1 Claude Puech 1
1 iMAGIS - Models, Algorithms and Geometry for Computer Generated Image Graphics
GRAVIR - IMAG - Graphisme, Vision et Robotique, Inria Grenoble - Rhône-Alpes
Abstract : The radiosity method is particularly suitable for global illumination calculations in static en- vironments. Nonetheless, for applications of image synthesis such as lighting design or ar- chitectural simulation, we have to deal with dynamic environments. To make the method usable in a real case, the illumination has to be updated as fast as possible after an object moves. The efficient way is to find the calcula- tions strictly necessary to be recomputed after a change in the scene. The largest part of the computation time is spent on visibility calcula- tion. In this paper, we investigate the possible speed ups in those calculations. We propose the use of the visibility complex for radiosity calculations. The presented study is realized for 2D scenes of convex objects in the static case. We show that the visibility complex is very suitable for radiosity calcula- tions in this context, and that it also allows for efficient updates in the dynamic case.
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Rachel Orti, Frédo Durand, Stéphane Rivière, Claude Puech. Using the visibility complex for radiosity computation. Applied Computational Geometry (ACM Workshop on Applied Computational Geometry, Philadelphia), 1996, Philadephie, United States. pp.177--190. ⟨inria-00510118⟩

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