XTick: 整合衝擊與擠壓力回饋以延長控制器周圍全方位動態作用力點之衝擊力

Abstract

在VR場景中互動時，周遭環境與手持工具的碰撞常以較短、較急促的衝擊力回饋表達，然而當互動方式有持續施力時，此衝擊力回饋則必須有長時間的表達方式，例如持劍相抵。此現象較少被討論且目前並無手持裝置可同時提供全方向、全位置以及任意時長的衝擊力回饋。我們提出了控制器原型XTick，透過整合衝擊與擠壓力回饋以延長控制器周圍全方位動態作用力點之衝擊力。XTick可將全方向的手部擠壓力回饋整合進各方向、位置組合的衝擊力回饋以延長力回饋至任意時長。經由回饋整合實驗可得到衝擊力大小與擠壓片傾斜與抬起高度的關係，而回饋延長實驗則進一步探討擠壓片下降速度對使用者主觀認知到的力道與時間延長效果的影響，最後則透過VR體驗驗證整合擠壓後可提供較佳的觸覺回饋效果。

Impact feedback, with a sharp force increase and lasting for a short duration, is common in VR. However, it can be extended over a long duration when the applied impact force is sustained, e.g. when swords press against each other, which is less discussed. Furthermore, rendering impact in the position and direction corresponding to VR scenarios is crucial for VR experiences. We propose a controller, XTick, to render omnidirectional impact all round the controller in both short and long durations by integrating impact and pressing feedback. Xtick incorporates omnidirectional pressing force into impact in various positions and directions to render impact in any duration. An integration study was to understand the relationship between impact level and the platforms' tilting and extrusion during pressing. An impact extension study was to observe how the platforms’ speed during releasing affects users’ experiences. A VR study was to verify that XTick enhances VR experiences.