Fast and accurate hierarchical radiosity using global visibility
Fast and accurate hierarchical radiosity using global visibility
复制标题
使用全局可见性快速准确的分层光能传递
DOI：
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发表时间：
1999
期刊：
影响因子：
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通讯作者：
C. Puech
中科院分区：
文献类型：
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作者：
F. Durand;G. Drettakis;C. Puech
最近的分层全局照明算法允许生成具有高度真实感的图像。尽管如此，适当的光传输，高质量的网格划分和准确的可见性计算的细化可能是具有挑战性的任务。这对于包含多个光源的场景和主要由间接光照亮的场景尤其如此。我们提出了解决这些问题的方法，通过扩展一个全局可见性的数据结构，可见性骨架。这个扩展允许我们计算精确的点到多边形的形状因子在顶点创建的细分。这些结构还为所有灯光交互提供可见性信息，从而实现智能优化策略。高质量的网格是基于感知的排名策略，这导致在适当的插入不连续曲线到代表照明的网格的基础上实现的。我们引入了一个层次的三角剖分，允许使用精确的可见性和网格生成层次光能传递解决方案。我们的实施结果表明，我们的新算法产生高品质的独立于视图的照明解决方案，直接照明，多灯的场景，也主要是间接照明照亮的场景。
Recent hierarchical global illumination algorithms permit the generation of images with a high degree of realism. Nonetheless, appropriate refinement of light transfers, high quality meshing, and accurate visibility calculation can be challenging tasks. This is particularly true for scenes containing multiple light sources and scenes lit mainly by indirect light. We present solutions to these problems by extending a global visibility data structure, the Visibility Skeleton. This extension allows us to calculate exact point-to-polygon form-factors at vertices created by subdivision. The structures also provides visibility information for all light interactions, allowing intelligent refinement strategies. High-quality meshing is effected based on a perceptualy based ranking strategy which results in appropriate insertions of discontinuity curves into the meshes representing illumination. We introduce a hierarchy of triangulations that allows the generation of a hierarchical radiosity solution using accurate visibility and meshing. Results of our implementation show that our new algorithm produces high quality view-independent lighting solutions for direct illumination, for scenes with multiple lights and also scenes lit mainly by indirect illumination.