基于DXF文件的零件图形优化存储技术及应用研究

Optimized Storage Technology and Usage of Part Drawing On Basis of DXF File

通过对DXF文件特点的分析,利用了图形代码的可调换性和可拼接性,针对传统从DXF文件获取图形元素数据方法的缺陷,提出了根据实际需要对图元信息进行分类并按照加工顺序对其进行存储优化的方法,该方法解决了封闭图形识别及存储顺序优化、类型判别等问题。同时,应用面向类型设计方法实现了一种高性能、扩展性强的图形数据库。应用SQL Sever建立了图形数据库并采用C#及Object-ARX等开发工具实现了DXF图元信息读入数据库,最终实现还原到AutoCAD的功能。

According to the analysis the characteristic of DXF, as well as to the summary of the capacity of change and joint, the paper directs at the flaw in the method of obtaining graphic element data from DXF file in the traditional way, and proposes an approach to classify the graphic element data according to need and optimize the saving method based on the machining order, which solves the identifying problem of closed graphics as well as the one of optimization of saving order and type distinguishing. Also, the paper creates a graphic database of high-performance and high-expendability through a type-oriented designing method. Finally, by using SQL Server to establish graphics database and applying C# and ObjectARX, it realizes the function of reading DXF graphic element data to database and restore to AutoCAD.