3D Selection Vault

ViewfinderVR

Also known as Through-the-lens viewfinder

A head-following panel shows the user's view like a camera viewfinder; they freeze it, place and zoom it within reach, and then select distant objects by pointing at or touching their images on the panel.

How it works

With Quest hand tracking, the panel mirrors the view until the non-dominant hand pinches it, which freezes the image; the panel can then be moved and rotated, and middle- or ring-finger pinches with vertical hand motion zoom the view or resize the panel. Looking at the open palm resets it. Objects are selected through the panel either with a ray from the dominant hand plus a pinch (ViewfinderVR-Ray) or by pushing the index fingertip through the panel (ViewfinderVR-Touch). In an ISO 9241-9 Fitts task with 20 participants, Touch took 1.29 s at 3.16 bit/s and Ray 1.69 s, against 2.38 s and 1.64 bit/s for raycasting, with lower workload; setting up the panel took about 21 s. It does not help with occluded targets.

Papers