不规则网格的简单,快速和健壮的光线投射

P. Bunyk, A. Kaufman, Cláudio T. Silva
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引用次数: 60

摘要

在本文中,我们描述了一个简单而有效的光线投射引擎,适用于快速探索由四面体细胞组成的不规则网格,或其他细胞复合体,其中细胞已被分解成面。在我们的方法中,在预处理阶段,所有的细胞被分解成相应的面。在所有人脸转换到屏幕空间后进行可见性确定;在这里,我们为每个像素计算一个刺入边界面的有序列表。最后一个阶段是实际的光线投射,它对每个像素独立执行,基本上是在刺状有序列表的每个组件内的细胞复合体中行走。对于颜色计算,一个简单的分析照明模型应用于每个光线和细胞的交叉点。算法简单,实现速度快,鲁棒性好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Simple, Fast, and Robust Ray Casting of Irregular Grids
In this paper we describe a simple and efficient ray casting engine that is suitable for the rapid exploration of irregular grids composed of tetrahedra cells, or other cell complexes where cells have been broken up into faces. In our method, in a preprocessing phase, all the cells are broken into their corresponding faces. Visibility determination is performed after all the faces have been transformed into screen space; here we compute for each pixel an ordered list of the stabbing boundary faces. The final phase is the actual ray casting, which is performed independently for each pixel, and is basically a walk in the cell complex inside each component of the stabbing ordered list. For color calculations, a simple analytical lighting model is applied to each intersection of ray and cell. Our algorithm is simple, and our implementation fast and robust.
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