基于射线的虚拟手动态碰撞检测算法

Dynamic collision detection algorithm of virtual hand based on ray

针对没有力反馈的数据手套,结合刚体和软体模拟人手,利用射线特性对虚拟手抓取操作过程进行分析,提出了基于射线的虚拟手动态碰撞检测算法。首先将射线碰撞应用于数据手套碰撞检测上。文中描述了该算法,并给出了算法的流程图,针对单个手指和物体接触过程,将该动态碰撞检测算法和传统的静态碰撞检测算法进行比较,结果证实:该动态碰撞检测算法能够提供具有真实感的虚拟手交互模拟视觉信息反馈,有效避免了虚拟手和物体间的穿透,在总体性能上优于传统静态碰撞检测算法。该动态碰撞检测算法可以推广到其他的系统仿真应用。

By using a model combining both solid and deformable objects to simulate human hand, a new dynamic collision detection algorithm of virtual hand based on ray is put forward based on the analysis of ray features of fingers grasping virtual object. The algorithm could be applied in no force feedback data glove. The algorithm is studied and the flow charts of the algorithm are given in the paper. Also, the comparison is conducted between this dynamic collision detection algorithm and the traditional static one in the collision detection of one finger and virtual object. The results indicate that the performance of the proposed algorithm is faster than the traditional static one. Furthermore, the algorithm can provide realistic visual information feedback of virtual hand interaction, and avoid effectively penetration between virtual fingers and object. This dynamic algorithm can also be applied to other dynamic collision detection simulation systems.