块及属性在Auto CAD后置设定中的研究与应用

Research and application of block and attribute in Auto CAD subsequent-set-up

块是由多个对象组成并赋予块名的一个整体,可随时作为一个单个对象插入到当前图形中指定的位置.充分利用Auto CAD软件的高级应用技巧———图块及其属性的功能,针对计算机绘图的习惯以及二次开发语言不熟悉的普通用户开发一种Auto CAD无限空间绘图模板、标题栏及图幅后置设定的绘图方法.对经常使用的标题栏、图幅等内容定义成块或带有属性的块,建成所需的图形库.任何Auto CAD用户都可以在二次开发的图形库中调用,以增强资源的共享.用户不但可以提高图样绘制时制作标题栏的速度,减少许多重复性的工作,而且能节省大量的存储空间,在绘图中更能合理地布局,不受图幅的限制,充分发挥计算机在“无限”空间上绘图的优势.

The block, a whole composed of many objects and given the name, can be inserted in the current sketch as a single object at any time. By means of the advanced technique of Auto CAD software, that is, picture block and its attribute, a drawing approach concerning Auto CAD infinite space drawing model, title column and drawing subsequent-set-up has been developed for the practice of computer drawing those users who are unfamiliar with the secondary developing language. The title column and drawing used frequently are defined as blocks with attribute, and the needed graphic database is built, so that any Auto CAD users may share the graphic database. For the u^rs, not only the efficiency in design and drawing gets increased, but also much repeating work is reduced. In addition, a great deal of storage space can be saved. During drawing, the users can reasonably arrange the drawing with no limitation, and make full use of computer in drawing.