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Parallel and adaptive visibility sampling for rendering dynamic scenes with spatially varying reflectance.
- Source :
-
Computers & Graphics . Feb2014, Vol. 38, p374-381. 8p. - Publication Year :
- 2014
-
Abstract
- Abstract: Fast rendering of dynamic scenes with natural illumination, all-frequency shadows and spatially varying reflections is important but challenging. One main difficulty brought by moving objects is that the runtime visibility update of dynamic occlusion is usually time-consuming and slow. In this paper, we present a new visibility sampling technique and show that efficient all-frequency rendering of dynamic scenes can be achieved by sampling visibility of dynamic objects in an adaptive and parallel way. First, we propose a two-level adaptive sampling scheme to distribute sample points spatially and compute visibility maps angularly on each sample point. Then, we present a parallel hemispherical distance transform to convert these visibility maps into spherical signed distance fields. Finally, using such a distance-based visibility representation, we integrate our visibility sampling algorithm in the all-frequency rendering framework for scenes with spatially varying BRDFs. With an entire GPU-based implementation, our algorithm enables interactive all-frequency rendering of moderate dynamic scenes with environment lighting and spatially varying reflectance. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00978493
- Volume :
- 38
- Database :
- Academic Search Index
- Journal :
- Computers & Graphics
- Publication Type :
- Academic Journal
- Accession number :
- 94155443
- Full Text :
- https://doi.org/10.1016/j.cag.2013.10.036