Um método de iluminação global aproximada para ambientes complexos baseado em radiosidade e decomposição célula-portal

• Ano de defesa: 2008
• Autor(a) principal: Barbosa, Ildenir da Costa
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Programa de Pós-Graduação em Computação; Computação
• Palavras-chave em Português: Computação; Radiosidade; Decomposição célula-portal; GPU; Computer science; Radiosity; Cell-portal decomposition; CNPQ::CIENCIAS EXATAS E DA TERRA::CIENCIA DA COMPUTACAO
• Link de acesso: https://app.uff.br/riuff/handle/1/18255

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.