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

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As bare-hand interaction has been rising in AR/VR environments, a crucial challenge emerges: How can we incorporate haptic feedback while keeping hands bare? 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 found in: Paper | DOI | Video

^{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
  • Meta Quest 2