opengl编程指南，网上很多，但都不是清晰版，看起来很费劲，我上传的这个是清晰版的，用超新星打开。希望对那些对opengl感兴趣的朋友有用！-Opengl programming guide, online a lot, but are not clear version, it looks very laborious, I uploaded this is clear version of, use the supernova open. For those who hope to ope