弹跳球体,这个演示不仅仅表现了一个球体的简单弹跳过程，主要的还是向大家提供一个真实球体的制作方法：注意球体表面的光泽以及阴影。-bouncing ball, the demonstration was not just about a simple bouncing ball in the process, or to provide you with a real ball production methods : Note ball in the sunlight and shadow.