VRML中关于雾的情况 可以通过观察者能见度调整雾的浓淡。 雾的龙都与人在雾中的能见度相反-VRML on the foggy situation can be adjusted by the observer visibility fog shading. Dragon fog in fog with the visibility of the opposite

透视纹理算法！透视纹理映射可以根据多边形距离观察者的远近而进行相应的调整从而产生比仿射纹理映射更真实的效果。-Perspective texture algorithm! Perspective texture mapping polygon from the observer in accordance with the distance and adjust accordingly in order to produce more than the real affine texture m

使用OpenGL通过动态调整观察点位置实现三维动画.-Use OpenGL observer location by dynamically adjusting achieve three-dimensional animation.