一个面向可变形模型实时有效的接触反馈框架

由于力反馈需要很高的计算速度及变形反馈需要详细的图形信息 ,本文提供一个实时有效的接触反馈框架 ,通过在粗糙三角形网格上进行局部细分来实现。当检测到接触后 ,将发生碰撞的表面细分以产生一个粒子系统。利用此粒子系统 ,用近似速度锥理论对形变进行模拟。同时 ,采用弹簧 -阻尼模型计算形变力。最后 ,对此框架进行了测试并实际应用于一个医疗规化仿真系统。

Real Time and Efficient Haptic Feedback Framework for Deformable Objects

On account of the high computational speed required for force feedback and the detailed graphic required for deformation feedback, this paper presents a real time and efficient haptic feedback framework by subdividing the area of interest on a relatively coarse triangular mesh. When a contact is detected, a portion of the colliding surface is subdivided and a particle system produced, which is used for deformation based on the approximate velocity cone theory. Simultaneously, a spring\|damper model is used for computing the contact force. Finally, these techniques are tested and implemented in a surgery planning simulation system.