这是一个类似于视频解释opengl中关于 视点，裁剪窗， 模型变换，透视体等坐标变换相关内容的好东西，对初学者来说能够很好地帮助掌握这些概念，即使是高手也可以看看源码，好多写写高质量的代码-This is a similar video to explain opengl on the point of view, cutting windows, model transformation, perspective, etc. related to the content coordinate transformation good things, good for beginners can help to master these concepts, even the master can also take a look at source, a lot of writing high quality code