基于delphi的ACAD二次开发源代码例子，绘制一个空间模型的平面投影。该程序的运行将自动开启ACAD，请务必先安装ACAD，最好是2002版的。-Based on the secondary development of ACAD in delphi source code examples, mapping a space model of planar projection. The operation of the program will automatically open ACA