【摘要】 提出一种几何约束求解组件与CAD平台的集成框架,基于此设计了一个动态几何约束系统。该系统利用目标捕捉和尺寸推断结果,可自动建立优化的欠约束几何约束模型。引入了自定义的约束实体,使得约束关系成为可见的、易管理的对象。增加了的对象反应器和命令反应器,很好地支持了平台本身的Undo/Redo操作。系统实现了约束信息与几何模型文件的同步存取。更多还原

【Abstract】 The integration framework of geometric constraint solving engine and CAD platforms is proposed,and thus a dynamic geometric constraint system is developed.Using the feedback information from Object Snap and dimension inference,the unconstrained geometric constraint models can be constructed automatically during drafting.The customed constrain entity is introduced,which achieves that various constraint relations between geometric elements become visible and controllable objects.The new-created object reactor and command reactor are combined to provide preferable support to the original Undo and Redo operations of CAD platform.Additionally,the ability to directly access constraint information while saving and opening associated geometric models is also implemented.更多还原