AutoCAD与ParaSolid三维边界模型信息直接交换张应中.pdf

2010 年 工 程 图 学 学 报 2010 第 5 期 JOURNAL OF ENGINEERING GRAPHICS No.5 AutoCAD 与 ParaSolid 三维边界模型 信息直接交换 张应中， 罗晓芳， 乔 磊 （大连理工大学机械工程学院，辽宁大连 116024 ） 摘 要：对 ACIS 和 ParaSolid 的三维实体边界表达数据结构进行分析，基于 DwgDirect 接口技术，直接打开 AutoCAD 的 DWG 文件，对 AutoCAD 的 DWG 文件中基于 ACIS 的三维实体边界信息遍历，获取实体边界的拓扑信息和几何信息；基于 ParaSolid 提供 的 API 开发函数，通过实体拓扑构造、实体几何构造和几何与拓扑附属关联，实现AutoCAD 与 ParaSolid 三维边界模型的直接交换。最后给出一个直接交换实例。 关 键 词：计算机应用；AutoCAD；ParaSolid；三维边界模型；直接交换 中图分类号：TP 391 文献标识码：A 文 章 编 号：1003-0158(2010)05-0169-06 Direct Exchange of Three-dimensional Boundary Model Information between AutoCAD and ParaSolid ZHANG Ying-zhong, LUO Xiao-fang, QIAO Lei ( School of Mechanical Engineering, Dalian University of Technology, Dalian Liaoning 116024, China ) Abstract: The data structures of the three-dimensional solid boundary expression for ACIS and ParaSolid are analyzed, based on DwgDirect interface technology DWG files in AutoCAD are directly opened and the three-dimensional entity boundary information based on ACIS in AutoCADs DWG file are searched and accessed. Based on the API development function provided by ParaSolid, by means of constructing topology entities, constructing geometry entities and associating geometry entities to topology entities procedures, the accessed boundary topology and geometry information can be directly exchanged to construct a solid model based on PrarSolid. Thus direct exchange of three-dimensional boundary model information between AutoCAD and ParaSolid is realized. At last an example of direct exchange is given.