图形学中的几个重点实验的文档，其中包括二位图形变换，直线的几种不同算法，以及抛物线的画法等。文档中有详细源码和图形实例。-Graphics in the document several key experiments, including two graphics transform, line of several different algorithms, and the parabola of the painting and so on. Source document in detail and graphics examples.