基于普通算法进行几何推理的参数化设计方法

提出了一种基于普通算法进行推理的参数化设计方法。该方法引入了建立和管理参数化模型的新策略 ,通过扩展一般的图形数据结构统一表示几何约束 ,基于普通算法实现几何推理。在此基础上开发了面向对象的参数化设计系统 ,验证了此算法的有效性

An Approach to Parametric Design Based on Geometric Reasoning

Parametric design is an effective tool for con ceptual design because of its powerful functions such as sketch design and dime nsional drive. We present a parametric design method based on geometric reasonin g.. Such a method is accomplished by a general algorithm. With a record of the c onstruction sequence, important information about the designer's intent is captu red. A new strategy of constructing and managing the parametric model is used in this method. It extends usual graphics data structure to describe geometric con straints. The geometric constraints are self-contained automatically without un der-constraints and over-constraints. Geometric reasoning is accomplished by a general algorithm instead of an expert system. An object-oriented parametric d esign system is then developed and the validity of the algorithm is verified by an example.