这是一个OpenGL调用Cg程序的例子，简单的说明了OpenGL程序如何调用Cg程序；在编译前，必须确定安装了Nvidia的Cg ToolKit!-OpenGL This is a procedure called Cg example, a simple explanation of how OpenGL procedure called Cg procedures; the compiler, must determine installed Nvidia's Cg ToolKit!