Interactive caustics using local precomputed irradiance

Chris Wyman, C. Hansen, P. Shirley
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引用次数: 22

Abstract

Bright patterns of light focused via reflective or refractive objects onto matte surfaces are called "caustics". We present a method for rendering dynamic scenes with moving caustics at interactive rates. This technique requires some simplifying assumptions about caustic behavior allowing us to consider it a local spatial property which we sample in a preprocessing stage. Storing the caustic locally limits caustic rendering to a simple lookup. We examine a number of ways to represent this data, allowing us to trade between accuracy, storage, run time, and precomputation time.
使用局部预计算辐照度的交互焦散
光通过反射或折射物体聚焦在哑光表面上的明亮图案被称为“焦散”。我们提出了一种以交互速率呈现具有移动焦散的动态场景的方法。这种技术需要一些关于焦散行为的简化假设,允许我们将其视为我们在预处理阶段采样的局部空间属性。在本地存储苛性将苛性呈现限制为简单查找。我们研究了许多表示该数据的方法,允许我们在准确性、存储、运行时间和预计算时间之间进行权衡。
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