Chairman Eurographics Publications Board.
GEARS: A General and Efficient Algorithm for Rendering Shadows
Article first published online: 29 APR 2014
© 2014 The Authors Computer Graphics Forum © 2014 The Eurographics Association and John Wiley & Sons Ltd.
Computer Graphics Forum
Volume 33, Issue 6, pages 264–275, September 2014
How to Cite
Wang, L., Zhou, S., Ke, W. and Popescu, V. (2014), GEARS: A General and Efficient Algorithm for Rendering Shadows. Computer Graphics Forum, 33: 264–275. doi: 10.1111/cgf.12348
- Issue published online: 25 SEP 2014
- Article first published online: 29 APR 2014
- National Natural Science Foundation of China. Grant Numbers: 61272349, 61190121, 61190125
- Macao Science and Technology Development Fund. Grant Number: 043/2009/A2
- Beijing Science Technology Star Plans and Technology Star Plans. Grant Number: 2009B09
- National High Technology Research and Development Program of China through 863 Program. Grant Number: 2013AA01A604
- soft shadows;
- interactive rendering;
- hard shadows;
- I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism-Texture;
- and texture
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.