这是一个雾的openGL教程程序，它包括了命令窗口能动态改变雾的函数，雾的颜色也能够被改变-The fog tutorial program (shown at right) demonstrates how to use depth cueing (or fog) in OpenGL. It includes command panels that allow dynamic update of the parameters for linear, exponential and exponential2 fog functions. The fog color can also be dynamically changed.