基于点造型的简单阴影生成方法

Formation Method of Simple Shadow Based on Points

研究基于点表示的物体的真实感图形阴影生成方法,提出了Z缓冲器的改进算法.在此算法中取光源方向为视线方向,对景物点进行坐标变换,按Z值大小得到距离光源最近的点,这些点即为产生阴影的点.该算法避免了大量的求交运算.试验结果表明,该基于点的造型表示方法和阴影生成算法可以较准确、真实地反映实际场景中的阴影现象.

We researched the shadow of PBR, and proposed an improved algorithm of Z-buffer, i. e. , we transformed the coordinate from the view vector to light vector, calculated the points according to Z value which are the nearest distance to the light and produce a shadow. This algorithm avoids abundant intersection operation. Experiment result shows PBR and shadow algorithm can display the shadow phenomenon exactly and truly.