断面绘制Lisp源代码，自带有 纵横断面原始数据示例，可以参考学习。-Section draws Lisp source code comes with the original data of the vertical and horizontal cross-section sample, can refer to the study.

在autocad中自定义实体，将外部的图片数据绑定到cad中，可以让rasterimage脱离原始图片文件存在cad中。-Autocad in custom entity in the external data binding to cad pictures, you can make out the original picture file exists rasterimage in cad.