基于VBA的AutoCAD中间圆弧命令开发

Development of Auto CAD Intermediate Circular Arc Command Based on VBA

利用Auto CAD软件强大的二次开发功能,对在工程制图中常见的中间圆弧绘制问题进行研究,推导出解决绘制该圆问题的数学模型.并设计了程序框图,使用VBA编程语言,编写出命令程序和用户界面.通过实例验证,得出该命令使用方便,并能快捷地绘制中间圆弧.与常规辅助线绘制方法相比,绘图效率大大提高,减轻绘图人员的工作负担,提高了工作效率.该命令也扩充了Auto CAD绘圆功能.

The paper uses the strong secondary development function of AutoCAD software to study the common issue of drawing inter-mediate circular arc in engineering drawing,and deduces a mathematical model to solve the problem.It designs the process diagram u-sing VBA programming language,and writes command procedures and user interface.Based on examples,it is indicated that the com-mand is easy to use and could draw intermediate arc conveniently.Compared with the conventional method using auxiliary lines,draw-ing efficiency is greatly improved,the workload of drawing staff is reduced and their work efficiency is improved.The order also extends the function of AutoCAD drawing circles.