基于形状特征的参数化作图的变量设计方法

Design method of variables for parametrization drafting based on shape features

通过对参数化的分析、研究，提出参数化设计过程和图形参数化的概念，推出基于形状特征的参数化作图的变量设计方法．该方法以含控制形状特征的几何参数变量的模型图为图标，引导驱动，交互输入变量值并响应形状特征的语义操作，实现参数化设计过程．同时又记录参数变量值，显示参数化作图进程，以便修改参数变量值优化图形。

By way of analysing and researching on parametrization, this paper has put forward the conception of parametric designing process and of figure parametrization, and deduced a designing method of variables for parametrization drafting based on shape features. Taking the model graph with variables of geometric parameters containing the control of shape features as graphic symbol, this method realizes the parametric drafting process by guiding drive, inputting values of variables interactively and performing semantic operation which responds to shape features. The values of parametric variables are recorded and parametric drafting processes are displayed at the same time in order to revise values of parametric variables, optimize the figures and realize the variation and deformation of shape features with the same structure but different sizes.