TwinSpin: A Virtual Ball in a VR Controller Enabling In-Hand 3DoF Rotation
summary
TwinSpin is a VR power‑grip controller that embeds two 6 mm mini-trackballs mounted orthogonally to simulate rolling a single virtual ball, letting fingers drive full 3DoF rotation while the arm controls translation. A prototype is evaluated with docking tasks (20 random target pairs) in two studies with 18 and 16 participants, and it significantly reduces arm travel distance, arm rotation, and task completion time while lowering perceived effort and wrist/arm/shoulder fatigue; rotation and translation control occur more parallelly and the device works as intended.
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chapters (9)
- 0:00Introduction and award
- 0:48Paper overview
- 2:14Controller design details
- 3:39User study setup
- 4:21Results and findings
- 5:23User behavior analysis
- 7:50Epistemic actions explanation
- 9:14Conclusion and benefits
- 10:18Q&A session
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