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介绍了一种基于ＡｕｔｏＣＡＤ的Ｎｏｔｉｆｉｃａｔｉｏｎ 机制的面向对象的参数化方法。此方法将所有的实体细分为简单的标准对象并为各对象建立相应的反应器。反应器分为两种： 形状约束反应器和位置约束反应器。前者影响标准的几何形状； 后者影响对象的位置。通过Ｎｏｔｉｆｉｃａｔｉｏｎ 机制， 当一个对象的尺寸被改变的时候， 通知器将通知对应的实体和其它相关的对象， 以实现尺寸驱动的参数化设计。此方法应用于模具ＣＡＤ系统的软件开发中， 收到了较好的效果。
This paper introduces an object-oriented parameterization method of Notification mechanism based on AutoCAD. This method subdivides all the entities into simple standard objects and establishes the corresponding reactors for each object. There are two types of reactors: shape-confined reactors and position-confined reactors. The former affects the standard geometry; the latter affects the position of the object. Through the Notification mechanism, when the size of an object is changed, the notifier will notify the corresponding entity and other related objects to achieve size-driven parametric design. This method is applied to the mold CAD system software development, received good results.