AutoCAD与ParaSolid三维边界模型信息直接交换

Direct Exchange of Three-dimensional Boundary Model Information between AutoCAD and ParaSolid

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。

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 AutoCAD＇s 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.