gd 是一个图形库。它允许你的代码快速画图，使用线，弧，文件，多颜色，从其他的图片剪切和粘贴，充满填充和编写一个PNG文件结果。-gd is a graph storehouse. It permits your code fast painting, the use line, the arc, the document, the multi- colors, cut from other pictures and glue, fill fill and compile a PNG doc

本源码给出了实现线段和矩形的裁剪算法. 包含有一\"图形裁剪\"文件夹 实验步骤的简要提示的WORD文档--Grphics experiment NO4-图形裁剪.doc 一可执行文件-- 图形裁剪.exe - The source code has produced the realization line segment and the rectangle cuts out the algorithm Contains has a \"graph to cut out

功能比较全面，可以实现三维图形变换及二维图形裁剪的功能-three dimensional transform two dimensional cut out