虚拟现实大空间下多虚拟目标被动触觉交互方法

针对虚拟现实（VR）大空间下为重定向行走的用户提供被动触觉时存在的虚实交互目标无法一一对应的问题，提出了一种用两个物理代理作为触觉代理为多个虚拟目标提供触觉反馈的方法，以在基于人工势场（APF）的重定向行走过程中，交替地满足用户被动触觉的需求。针对重定向行走算法本身以及标定不精确等原因造成的虚实不对齐的问题，对虚拟目标的位置及朝向进行设计并且在交互阶段引入触觉重定向。仿真实验表明对虚拟目标位置和朝向的设计可以大幅降低对齐误差；而用户实验结果证明触觉重定向的引入进一步提升了交互准确性，且能为用户带来更丰富、更具沉浸感的体验。

Passive haptic interaction method for multiple virtual targets in vast virtual reality space

Focused on the issue that real interaction targets cannot be matched with the virtual interaction targets one by one when providing passive haptics for redirected walking users in a vast Virtual Reality （VR） space， a method with two physical proxies acting as haptic proxies to provide haptic feedback for multiple virtual targets was proposed， in order to meet the user’s passive haptic needs alternately during the redirected walking process based on Artificial Potential Field （APF）. Aiming at the misalignment of virtual and real targets caused by the redirected walking algorithm itself and inaccurate calibration， the position and orientation of the virtual target were designed and haptic retargeting was introduced in the interaction stage. Simulation experimental results show that the design of the virtual target position and orientation can reduce the alignment error greatly. User experiments prove that haptic retargeting further improves the interaction accuracy and can bring users a richer and more immersive experience.