ClockRay
Also known as Wrist-rotation depth cursor
A controller ray is locked onto a group of overlapping objects, and then turning the wrist like a clock hand steps a depth cursor from one intersected object to the next.
How it works
On an HTC Vive controller the user aims the ray and presses the touchpad to lock it. While the touchpad is held, pronation and supination of the wrist (0–90°) is split into steps of 11.25°, and each step moves the depth cursor to the next object along the locked ray; the other intersected objects turn translucent and a pie-chart dial shows the current position. Releasing the touchpad selects the object under the cursor. A 1€ filter smooths the ray. With 36 participants (60 or 90 balls of 4 or 8 cm at 1 and 4 m), ClockRay took 2.28 s against 2.53 s for RayCursor and 3.18 s for raycasting, with error rates close to RayCursor (5% vs 3%) and far below raycasting (23%).
Papers
- Huiyue Wu, Xiaoxuan Sun, Huawei Tu, Xiaolong Zhang (2024). ClockRay: A Wrist-Rotation Based Technique for Occluded-Target Selection in Virtual Reality. IEEE Transactions on Visualization and Computer Graphics 30(7), 3767-3778 doi:10.1109/TVCG.2023.3239951