数据结构排序算法,透视投影是3D固定流水线的重要组成部分，是将相机空间中的点从视锥体(frustum)变换到规则观察体(Canonical View Volume)中，待裁剪完毕后进行透视除法的行为。在算法中它是通过透视矩阵乘法和透视除法两步完成的。



透视投影变换是令很多刚刚进入3D图形领域的开发人员感到迷惑乃至神秘的一个图形技术。其中的理解困难在于步骤繁琐，对一些基础知识过分依赖，一旦对它们中的任何地方感到陌生，立刻导致理解停止不前。-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.