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QuadStretcher: A Forearm-Worn Skin Stretch Display for Bare-Hand Interaction in AR/VR (ACM CHI 2024)

As the prevalence of bare-hand interaction rises in AR/VR environments, a crucial challenge emerges: How can we incorporate haptic feedback without encumbering the hands? QuadStretcher is a skin stretch display that delivers "substituted" haptic sensations on the forearm, facilitating immersive bare-hand AR/VR experiences. This work has been presented at CHI 2024, and more details about our work can be explored in: [Paper] (TBU) | [DOI] (TBU) | [Video] (TBU)


A use case example: QuadStretcher rendering real-time haptic feedback of the pulled rubber band.


Four bare-hand interaction scenarios in VR: Archery (Gradual Tension), Pistol (Impact), Sprayer (Rapid Tension), and Pulling Rubber Band (3-DoF Resistance Force).

What does this repository contain?

This repository provides materials for reproducing our work:

  • QuadStretcher Hardware (Open Hardware: How To Make)
    • 3D models (.stl) of servo motor housing, pinion gear, tactor, and magnet clip
    • Specifications and links to the used products: rack gear, magnet
    • Step-by-step guideline to build the QuadStretcher.
  • QuadStretcher Unity
    • Unity version: 2021.3.16f1
    • Running with VR Headset via Meta Quest Link
    • Four Unity Scenes (Archery, Pistol, Sprayer, and Slingshot) are ready.
  • Used VR Headset