MagicBall
Also known as MagicBall+, Magic Ball
A transparent sphere in front of the user holds a scaled-down 3D copy of all the selectable objects, keeping their relative sizes and positions; the user selects by touching a copy with the tip of a virtual stick.
How it works
Unselectable objects are removed and every selectable object gets a proxy inside the sphere; the joystick rotated and moved the mini-map. In MagicBall+ the joystick instead resizes a transparent point cursor on the stick, and when it encloses several proxies on trigger press they are laid out on a grid for a second step, while a single proxy is selected at once. In study 1 it was the slowest of seven techniques, hampered by hand tremor on small proxies; in study 2 MagicBall+ was still slowest with 7.52% errors, but had the highest hedonic score.
Papers
- Difeng Yu, Qiushi Zhou, Joshua Newn, Tilman Dingler, Eduardo Velloso, Jorge Goncalves (2020). Fully-Occluded Target Selection in Virtual Reality. IEEE Transactions on Visualization and Computer Graphics doi:10.1109/tvcg.2020.3023606