关键词: 离散点, 消隐, 阴影

Abstract: We researched the shadow of PBR, and proposed an improved algorithm of Zbuffer, i.e., we transformed the coordinate from the view vec tor 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.

Key words: discrete points, hidden points, shadow