CAD.NET二次开发，用ACCESS管理CAD图形，有可执行文件-CAD.NET secondary development, management of CAD drawings with ACCESS, executable file

本实例为VS2005编写的ARX事务管理实例，特别是AcTransaction::getObject()和close()的使用方法，作了正确演示。-ARX transaction management example this example is written in VS2005, especially in AcTransaction:: getObject () and close () method of use, make the correct demonstration.

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