这是计算机图形学课本上的伪代码，给学生第一手的资料，方便学生在伪代码的基础上进行修改，主要是OPENGL 的图形扫描转换以及图形生成、各种变换，如旋转、平移等。-This is computer graphics textbook of pseudo code, give students first-hand information, convenient for students on the basis of the pseudo code modifications, mainly is the OPENGL graphics scan conversion and graphics generation, all kinds of transformation, such as rotation, translation, etc.