Real-time, all-frequency shadows in dynamic scenes
Real-time, all-frequency shadows in dynamic scenes
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DOI：
10.1145/1399504.1360633
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发表时间：
2008-08
期刊：
影响因子：
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通讯作者：
T. Annen;Z. Dong;T. Mertens;P. Bekaert;H. Seidel;J. Kautz
中科院分区：
文献类型：
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作者：
T. Annen;Z. Dong;T. Mertens;P. Bekaert;H. Seidel;J. Kautz
复杂光照下动态场景中的阴影计算是一个具有挑战性的问题。基于预计算的方法提供了准确的实时解决方案，但难以扩展到动态场景。针对软阴影的专门方法可以处理动态物体，但速度不够快，无法处理多个光源。在本文中，我们提出了一种在任意环境光照下渲染动态物体的技术，该技术不需要任何预计算。关键要素是一种快速的近似软阴影计算技术，对于单个光源，它可以达到每秒数百帧。这允许用稀疏的区域光源集合来近似环境光照，并产生实时帧率。
Shadow computation in dynamic scenes under complex illumination is a challenging problem. Methods based on precomputation provide accurate, real-time solutions, but are hard to extend to dynamic scenes. Specialized approaches for soft shadows can deal with dynamic objects but are not fast enough to handle more than one light source. In this paper, we present a technique for rendering dynamic objects under arbitrary environment illumination, which does not require any precomputation. The key ingredient is a fast, approximate technique for computing soft shadows, which achieves several hundred frames per second for a single light source. This allows for approximating environment illumination with a sparse collection of area light sources and yields real-time frame rates.