各种类型的计算机,在各种领域里广泛使用,发展异常迅速。近两年来,学习并进行些CAD二次开发工作。由于对外界情况了解得少,所以谈得可能局限而片面。计算机绘图软件均有画线、画圆、画弧,图形移动、拷贝、旋转、变比例、做镜象、删除、恢复、修改文字大小等功能。并有图形 Various types of computers are widely used in various fields and have developed rapidly. In the past two years, learn and carry out some secondary CAD development work. Due to the lack of understanding of the outside world, the discussion may be limited and one-sided. Computer graphics software has the functions of drawing lines, drawing circles, painting arcs, moving graphics, copying, rotating, scaling, mirroring, deleting, restoring, and modifying text sizes. And there are graphics