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Title: Um método de iluminação global aproximada para ambientes complexos baseado em radiosidade e decomposição célula-portal
Keywords: Computação;  Radiosidade;  Decomposição célula-portal;  GPU;  Computer science;  Radiosity;  Cell-portal decomposition;  GPU
Issue Date: 12-Sep-2008
Abstract: This work propose a technique of global illumination that is able to simulate, at run-time, the light transport of perfect diffuse surfaces in complexes scenes with high degrees of occlusion. The method combines a culling strategy known as cell-portal decomposition with the computation of the scene radiosity in graphics hardware, exploring the parallelism provided by modern GPUs. The algorithm starts with a cell-portal decomposition of the scene where the light transport simulation is supposed to be computed.The portal of each cell is attached to a source of artificial light with the same geometry. This source of artificial light represents the radiosity emmited by a cell incident to an adjacent cell. Then, a synchronization step is run on the artificial light sources so that the radiosity of a cell reaches the adjacent cell. Finally, the scene is rendered based on the results obtained and a new syncronization step is started. As more steps are performed, the computed radiosity of the scene becomes more accurate.
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