基于现有的几何学习软件存在着交互方式不自然,不智能的缺点,设计并实现了一个笔式几何学习系统,周以模拟初中几何教学过程中,教师出题,学生答题的情境。笔式几何学习系统运用约束求解技术动态展示几何属性,运用草图识别技术将草图识别为几何图形,通过笔手势帮助用户更加方便地操作使用软件。评估表明,用户以笔交互的方式进行书写、绘图和操作,体现了和谐自然的人机交互模式。
The interaction in current geometry systems is not natural or intelligent. A pen-based geometry learning system is designed and implemented, which simulates the situation that teachers present geometry problems and students solve them. The system uses dynamic geometric constraint solving technique to display the geometric properties, utilizes sketch recognition technique to identify geometric primitives and adopts pen gestures to help users use the software more conveniently. Evaluation shows that users could use pen to write, draw and overate, which shows a natural and harmonic interaction mode.