CC Shadow Volumes

Lloyd, D. Brandon; Wendt, Jeremy; Govindaraju, Naga K.; Manocha, Dinesh

CC Shadow Volumes

Files

197-205.pdf (3.28 MB)

Date

2004

Authors

Lloyd, D. Brandon
Wendt, Jeremy
Govindaraju, Naga K.
Manocha, Dinesh

Publisher

The Eurographics Association

Abstract

We present a technique that uses culling and clamping (CC) for accelerating the performance of stencil-based shadow volume computation. Our algorithm reduces the fill requirements and rasterization cost of shadow volumes by reducing unnecessary rendering. A culling step removes shadow volumes that are themselves in shadow or do not contribute to thefinal image. Our novel clamping algorithms restrict shadow volumes to those regions actually containing shadow receivers. In this way, we avoid rasterizing shadow volumes over large regions of empty space. We utilize temporal coherence between successive frames to speed up clamping computations. Even with fairly coarse clamping we obtain substantial reduction in fill requirements and shadow rendering time in dynamic environments composed of up to a 100K triangles.

        @inproceedings{:10.2312/EGWR/EGSR04/197-205
,
booktitle = {Eurographics Workshop on Rendering
},
editor = {Alexander Keller and Henrik Wann Jensen
},
title = {{CC Shadow Volumes
}},
author = {Lloyd, D. Brandon and 
Wendt, Jeremy and 
Govindaraju, Naga K. and 
Manocha, Dinesh
},
year = {2004
},
publisher = {The Eurographics Association
},
ISSN = {1727-3463
},
ISBN = {3-905673-12-6
},
DOI = {/10.2312/EGWR/EGSR04/197-205
}
}