ACIS的开发例程，对初学者有一定帮助。主要展示如何配置和进行初步开发-ACIS development routines for beginners。Mainly show you how to configure and conduct a preliminary development

CAD二次开发，实现了用户交互的一些命令，以及用户选择等命令，需要配置CAD2012环境才能查看代码成果-CAD secondary development, the realization of the user interaction some commands, and user to select commands, such as CAD 2012 need to configure the environment to see the code

离散点是数据管理,采用4叉树的管理方式,对于搞图形算法的人员还是很有帮助的.渲染采用OSG,不能直接编译,需要配置一下环境,没提供-Discrete point data management, the use of 4-tree management methods, for persons engaged in graphics algorithms or helpful. Rendering using OSG, can not be directly translated, need t