读取并显示STEP格式文件,未完成,能正确将平面上任意单连通或多连通区域进行三角剖分

读取并显示STEP格式文件,未完成,能正确将平面上任意单连通或多连通区域进行三角剖分-STEP format to read and display documents, not completed correctly will be the plane of arbitrary simply connected or multi-connected region triangulation