We present Adaptic, a novel "hybrid" active/passive haptic device that can change shape to act as a proxy for a range of virtual objects in VR. We use Adaptic with haptic retargeting to redirect the user's hand to provide haptic feedback for several virtual objects in arm's reach using only a single prop. To evaluate the effectiveness of Adaptic with haptic retargeting, we conducted a within-subjects experiment employing a docking task to compare Adaptic to non-matching proxy objects (i.e., Styrofoam balls) and matching shape props. In our study, Adaptic sat on a desk in front of the user and changed shapes between grasps, to provide matching tactile feedback for various virtual objects placed in different virtual locations. Results indicate that the illusion was convincing: users felt they were manipulating several virtual objects in different virtual locations with a single Adaptic device. Docking performance (completion time and accuracy) with Adaptic was comparable to props without haptic retargeting.

翻译：我们提出Adaptic，一种新颖的“混合”主动/被动触觉设备，它能够改变形状，作为虚拟现实中一系列虚拟物体的代理。我们将Adaptic与触觉重定向技术结合使用，通过单个道具重定向用户的手部，为手臂可及范围内的多个虚拟物体提供触觉反馈。为了评估Adaptic结合触觉重定向的有效性，我们进行了一项被试内实验，采用对接任务来比较Adaptic与不匹配的代理物体（即泡沫球）以及形状匹配的道具。在我们的研究中，Adaptic放置在用户面前的桌面上，并在抓握之间改变形状，为放置在不同虚拟位置的各种虚拟物体提供匹配的触觉反馈。结果表明，这种错觉是令人信服的：用户感觉他们正在使用单个Adaptic设备操纵位于不同虚拟位置的多个虚拟物体。Adaptic的对接性能（完成时间和准确性）与未使用触觉重定向的道具相当。