Reflective shadow maps
Reflective shadow maps
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DOI：
10.1145/1053427.1053460
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发表时间：
2005-04
期刊：
影响因子：
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通讯作者：
C. Dachsbacher;M. Stamminger
中科院分区：
文献类型：
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作者：
C. Dachsbacher;M. Stamminger
在这篇文章中，我们提出了“反射阴影图”，一种交互绘制合理的间接光照的算法。反射阴影贴图是标准阴影贴图的扩展，其中每个像素都被视为间接光源。使用片段着色器中的自适应采样对这些间接灯光产生的照明进行动态评估。通过使用间接光照的屏幕空间内插，即使对于复杂的场景，我们也可以获得交互速率。由于我们主要在屏幕空间工作，因此额外的工作在很大程度上与场景的复杂性无关。产生的间接灯光是近似的，但会产生看似合理的结果，并且适合动态场景。我们描述了一个在现有图形硬件上的实现，并展示了我们的方法所取得的结果。
In this paper we present "reflective shadow maps", an algorithm for interactive rendering of plausible indirect illumination. A reflective shadow map is an extension to a standard shadow map, where every pixel is considered as an indirect light source. The illumination due to these indirect lights is evaluated on-the-fly using adaptive sampling in a fragment shader. By using screen-space interpolation of the indirect lighting, we achieve interactive rates, even for complex scenes. Since we mainly work in screen space, the additional effort is largely independent of scene complexity. The resulting indirect light is approximate, but leads to plausible results and is suited for dynamic scenes. We describe an implementation on current graphics hardware and show results achieved with our approach.