1、用用 Visual Basic Visual Basic 开发交互式开发交互式 CADCAD 系统系统 1 内 容 提 要 在交互式 CAD 系统中，不仅可以实现用鼠标绘图， 还可以选择图元，并 对选中的图元进行缩放、 缩小、 等操作。 在众多的交互式 CAD 开发工具中， Visual Basic 是使用最简单、应用最广泛、使用者最多的一种开发工具，Visual Basic 语言具备一定的绘图功能。本设计的主要内容是在学习 Visual Basic 语言和交 互式 CAD 技术的基础上，运用 Visual Basic 语言来开发交互式 CAD 系统。本系 统具有交互绘图功能。能实现鼠标绘图，
2、能对图形进行各种形式的缩放操作。本 文中的缩放主要包括图形的放大、缩小和局部放大与全屏显示。 关键词: Visual BasicVisual Basic 交互式 CAD 缩放 用用 Visual Basic Visual Basic 开发交互式开发交互式 CADCAD 系统系统 2 A b s t r a c t In interactive CAD system, not only may realize with the mouse cartography, but also may choose the chart Yuan, and to the chart Yuan which se
3、lects carries on the reproduce by pantograph, reduces, and so on the operation. In the multitudinous interactive CAD development kit, Visual Basic is the use simple, the application is most widespread, the user most one kind of development kit, Visual Basic language has the certain cartography funct
4、ion. This design main content is in studies Visual the Basic language and in the interactive CAD technology foundation, language develops the interactive CAD system using Visual Basic. This system has the alternately cartography function. Can realize the mouse cartography, can carry on each kind of form to the graph the reproduce by pantograph operation. In this article reproduce by pantograph mainly includes the graph the enlargement, reduces with the fractionated gain and the entire screen d
