二维草图变量化设计中的混合法求解

Hybrid Solving Method for Varia tion Design in 2D Sketch

变量化技术是当代ＣＡＤ技术的核心，以实现变量化设计为目的的几何约束求解有多种方法，但它们都存在一定的局限性。本文在讨论草图设计模型与基于几何约束图形表达方式的基础上，综合变量几何法和人工智能法的优点，提出了二维草图变量化设计中的几何约束混合法求解策略，该方法能够快速地进行约束求解及一致性检查，同时充分利用原图信息解决图形的二义性问题。

Variational design is the kernel of contemporary CAD technology. There are many solving methods for geometric constraint solving at the aim of variational design, but they all have some limitations. After discussing sketch design model and graph expression mode, this paper provides a hybrid solving method for variational design in 2D sketches. The method synthetize the strongpoint of variational geometry method and artificial intelligence method. It can solve constraints fast and check the coherence of them. It also uses original drawing effectively to solve graphics ambiguity problems.