基于ObjectARX 开发工程图模块的研究

三维实体建模在机械产品的设计过程中得到了广泛应用，但二维工程图仍 是当前指导生产和进行技术交流必不可少的文件。为了从三维实体模型快速得到二维工程 图，利用ObjectARX 二次开发工具，在AutoCAD 平台上开发工程图模块，实现了实体模型 向工程图的快速转化以及自动标注。工程图生成在模型空间，方便后续操作。通过实例证明 该工程图模块能够从特征实体模型中提取工程图的相关信息，快速生成二维工程图，大大提 高用户的工作效率。

Developing engineering drawing module base on ObjectARX

The 3D solid modeling is used widely in the design of machine production. But, the 2D drawing is still essential in production manufacturing and in technical exchanging. In order to construct the 2D drawing from 3D solid model, the engineering drawing module is developed based on AutoCAD with the secondary development tool ObjcetARX. Constructing the 2D drawing from a 3D solid model and automatic dimension are realized, and the 2D drawing is created in the model space which makes the user’s operation more convenient. An example shows that the engineering drawing module can extract the information of the 2D drawing from the 3D features solid and can construct 2D drawing rapidly. The design efficiency can be enhanced greatly.