香港一所大学讲解OpenGL的PPT课件，非常详细，一共有28MB,由于文件较大，防止上传出错，分成三部分,这是1-5章-University of Hong Kong, an OpenGL explain the PPT courseware, very detailed, a total of 28MB, the file is large, to prevent upload errors, divided into three parts, this is Chapter 1-5