GUO Jie and PAN Jingui, “Virtual Area Light for Dynamic and Spatially-Varying Area Lighting,” Chinese Journal of Electronics, vol. 24, no. 2, pp. 306-311, 2015, doi: 10.1049/cje.2015.04.013
Citation: GUO Jie and PAN Jingui, “Virtual Area Light for Dynamic and Spatially-Varying Area Lighting,” Chinese Journal of Electronics, vol. 24, no. 2, pp. 306-311, 2015, doi: 10.1049/cje.2015.04.013

Virtual Area Light for Dynamic and Spatially-Varying Area Lighting

doi: 10.1049/cje.2015.04.013
Funds:  This work is supported by the National Science Foundation of China (No.61321491).
  • Publish Date: 2015-04-10
  • We describe a technique for interactively rendering diffuse scenes with near-field area lighting by introducing a new light type called VAL (Virtual area light). The VALs are generated via the subdivision of the primary planar luminaire, and near-field area lighting effects can be simulated directly from the geometric and radiometric information of these VALs. To ensure a high fidelity of soft shadows, we propose the multi-PCF (Percentage closer filter) algorithm which evaluates visibility through several PCF values of each VAL. Experimental results reveal that our approach can render visually convincing near-field area lighting effects as well as soft shadows without any precomputation. Our strategy also enables high-quality direct illumination results in fully dynamic scenes under both time-varying and spatially-varying area lighting conditions in the order of milliseconds.
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