GEARS: A General and Efficient Algorithm for Rendering Shadows |
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| Authors: | Lili Wang Shiheng Zhou Wei Ke Voicu Popescu |
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| Affiliation: | 1. China State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, , Beijing, ChinaChairman Eurographics Publications Board.;2. China State Key Laboratory of Virtual Reality Technology and Systems, Beihang University, , Beijing, China;3. Macao Polytechnic Institute, , Macao, China;4. Computer Science, Purdue University, , West Lafayette, IN, USA |
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| Abstract: | We present a soft shadow rendering algorithm that is general, efficient and accurate. The algorithm supports fully dynamic scenes, with moving and deforming blockers and receivers, and with changing area light source parameters. For each output image pixel, the algorithm computes a tight but conservative approximation of the set of triangles that block the light source as seen from the pixel sample. The set of potentially blocking triangles allows estimating visibility between light points and pixel samples accurately and efficiently. As the light source size decreases to a point, our algorithm converges to rendering pixel accurate hard shadows. |
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| Keywords: | soft shadows interactive rendering hard shadows I 3 7 [Computer Graphics]: Three‐Dimensional Graphics and Realism‐Texture Color shading shadowing and texture |
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