Occlusion Textures for Plausible Soft Shadows *

Occlusion Textures for Plausible Soft Shadows *
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DOI:
10.1111/j.1467-8659.2007.01037.x
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发表时间:
2008-03
影响因子:
2.5
通讯作者:
E. Eisemann;Xavier Décoret
E. Eisemann;Xavier Décoret
中科院分区:
计算机科学4区
文献类型:
--
作者:
E. Eisemann;Xavier Décoret

文献摘要

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本文提出了一种新的方法来计算逼真的软阴影的复杂动态场景和矩形光源。我们使用预过滤的遮挡纹理来估计场景中每个点的遮挡,这些纹理动态地近似场景的几何形状。该算法速度快,其性能与光的大小无关。由于它是基于图像的,所以它基本上与场景的复杂性和类型无关。不需要先验信息,并且不存在发射器/接收器分离。这使得该方法吸引人且易于使用。
This paper presents a new approach to compute plausible soft shadows for complex dynamic scenes and rectangular light sources. We estimate the occlusion at each point of the scene using prefiltered occlusion textures, which dynamically approximate the scene geometry. The algorithm is fast and its performance independent of the light's size. Being image‐based, it is mostly independent of the scene complexity and type. No a priori information is needed, and there is no caster/receiver separation. This makes the method appealing and easy to use.