Some interactions in virtual environments need to be operated on inclined planes. If a real inclined plane can be found in the real environment that corresponds exactly to the angle of the virtual inclined plane to provide haptic feedback, the user's immersion can be enhanced. However, it is not easy to find such a real inclined plane in the real environment. We proposed a horizontal plane haptic redirection scheme, where users interacting with virtual inclined planes in virtual environments can obtain haptic feelings by using real horizontal planes that are easily available in the real world for redirection mapping. We also designed an integrated solution to locate the real horizontal plane and for haptic redirection based on the Vive Pro headset. Then we measured the angle and size thresholds for horizontal plane haptic redirection as 20° and 88%, respectively, through a user study. Through experiments, we also found that when the degree of redirection exceeded the threshold, the user's operation efficiency would be significantly reduced. In addition, we compared the horizontal plane haptic redirection scheme with the scheme without redirection and the scheme without haptic feedback to demonstrate the validity and necessity of the redirection scheme proposed in this paper.

中文翻译：

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水平面触觉重定向：在 VR 中实现虚拟斜面的触觉反馈

虚拟环境中的一些交互需要在斜面上进行。如果能够在真实环境中找到与虚拟斜面的角度精确对应的真实斜面来提供触觉反馈，则可以增强用户的沉浸感。然而，在现实环境中要找到这样一个真实的斜面并不容易。我们提出了一种水平面触觉重定向方案，在虚拟环境中与虚拟斜面交互的用户可以通过使用现实世界中容易获得的真实水平面进行重定向映射来获得触觉感受。我们还设计了一个集成解决方案，用于定位真实水平面并基于 Vive Pro 耳机进行触觉重定向。然后，我们通过用户研究测量水平面触觉重定向的角度和尺寸阈值分别为 20° 和 88%。通过实验我们还发现，当重定向程度超过阈值时，用户的操作效率会明显降低。此外，我们将水平面触觉重定向方案与无重定向方案和无触觉反馈方案进行了比较，以证明本文提出的重定向方案的有效性和必要性。