二维通用参数绘图系统

RESEARCH ON THE SYSTEM OF 2-D GENERAL PARAMETRIC DRAFTING

提出一种实现二维通用参数绘图的新方法．不必先作交工绘图，采用简捷的参数输入法描述图形．只输入图形的已知信息，交切计算自动分组进行．多解时由系统判定，必要时借助光标交互选解．该法不仅参数化实体，而且可参数化绘图命令．图形参数化过程和系列化图形生成相分离，输入尺寸便可迅速绘出一幅图形的系列化图形．

A new method of realizing the 2-D general parametric drafting is presented.In parametrizing a drawing figure it is not necessary to do prior interactive plotting but to adopt the simple and rapid parametric input method to describe the drawing figure.It is only necessary to input the known information of the figure.The intersectional and tangential calculations can be processed in entity groups automatically.The problem of multisolution is solved by the automatic judgement of the system,and with the aid of the light mark the interactive selection of solutions is made only when necessary.With this system not only the entities but also the plotting command can all be parametrized. Let the procedure of figure parametrization and the generation of senate figure be separated just by inputting the dimensions and the senate figure of a drawing can be plotted out rapidly.