Introduction - If you have any usage issues, please Google them yourself
Data structures sorting algorithm, 3D perspective projection is an important part of the fixed line is to point the camera space, as the cone from (frustum) transform to observe the rules of body (Canonical View Volume) in perspective to be carried out after the cut division of behavior. In this algorithm, which is matrix multiplication and perspective through the perspective divide step completed. Perspective projection transformation is to make a lot of just entering the field of 3D graphics developers are confused and even a mysterious graphics. One difficulty is the understanding of complicated steps, over-reliance on some of the basics, once on any of them unfamiliar place, immediately led to understandable to a halt.