面向NURBS曲面在线检测的IGES文件解释器的开发

Design of IGES Interpreter for On-line Inspection of NURBS Surfaces

在线检测系统选取测量点集的常用途径是从NURBS曲面获取,从CAD模型中解析NURBS曲面信息是在线检测系统的一项关键技术。通过对由CAD系统生成IGES文件的格式进行研究,提出一种从IGES文件析取NURBS曲面属性信息和定义信息的方法,在Visual C++6.0平台上开发IGES文件解释器,经过多次测试,开发的IGES文件解释器能够高效稳定地从IGES V5.2/5.3文件中析取NURBS曲面数据。

Getting measuring points is based on the NURBS surfaces for on-line inspection system ,and resolving NURBS surfaces＇information from CAD model is a key technology .Based on the research of IGES file＇format from CAD ,a method of resolving NURBS surfaces＇information from IGES is proposed ,and an IGES interpreter is designed with visual C ＋ ＋ 6 .0 .The extensive tests show the IGES interpreter can interpret IGES V 5 .2/5 .3 efficiently and stably .