一个简单的cg程序，在openGL中画一条线段，在cg中进行顶点变换成正弦曲线，在运行之前需要下载并按照cg安装包-Cg a simple procedure to draw a line in openGL in, carried out in the cg vertex transform into a sine curve, before the need to download and run the installation package in accordance with cg