vMirror: Enhancing the Interaction with Occluded or Distant Objects in VR with Virtual Mirrors
Nianlong Li, Zhengquan Zhang, Can Liu, Zengyao Yang, Yinan Fu, Feng Tian, Teng Han, Mingming Fan

CHI '21: The 2021 ACM CHI Conference on Human Factors in Computing Systems
Session: AR and VR

Abstract
Interacting with out of reach or occluded VR objects can be cumbersome. Although users can change their position and orientation, such as via teleporting, to help observe and select, doing so frequently may cause loss of spatial orientation or motion sickness. We present vMirror, an interactive widget leveraging reflection of mirrors to observe and select distant or occluded objects. We first designed interaction techniques for placing mirrors and interacting with objects through mirrors. We then conducted a formative study to explore a semi-automated mirror placement method with manual adjustments. Next, we conducted a target-selection experiment to measure the effect of the mirror's orientation on users' performance. Results showed that vMirror can be as efficient as direct target selection for most mirror orientations. We further compared vMirror with teleport technique in a virtual treasure hunt game and measured participants’ task performance and subjective experiences. Finally, we discuss vMirorr user experience and present future directions.

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Pre-recorded Presentations for the ACM CHI Virtual Conference on Human Factors in Computing Systems, May 8-13, 2021

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