# FingerMapper: Mapping Finger Motions onto Virtual Arms to Enable Safe Virtual Reality Interaction in Confined Spaces

## TL;DR

FingerMapper enables safe and precise virtual arm movements in confined VR spaces by mapping small finger motions, reducing fatigue and collisions while maintaining presence and enjoyment.

## Contribution

This paper introduces FingerMapper, a novel method that maps finger motions onto virtual arms, allowing safe and comfortable VR interactions in confined spaces.

## Key findings

- Reduces physical motion and fatigue compared to hand tracking.
- Increases perceived safety and reduces collisions in confined spaces.
- Maintains similar levels of presence and enjoyment as hand tracking.

## Abstract

Whole-body movements enhance the presence and enjoyment of Virtual Reality (VR) experiences. However, using large gestures is often uncomfortable and impossible in confined spaces (e.g., public transport). We introduce FingerMapper, mapping small-scale finger motions onto virtual arms and hands to enable whole-body virtual movements in VR. In a first target selection study (n=13) comparing FingerMapper to hand tracking and ray-casting, we found that FingerMapper can significantly reduce physical motions and fatigue while having a similar degree of precision. In a consecutive study (n=13), we compared FingerMapper to hand tracking inside a confined space (the front passenger seat of a car). The results showed participants had significantly higher perceived safety and fewer collisions with FingerMapper while preserving a similar degree of presence and enjoyment as hand tracking. Finally, we present three example applications demonstrating how FingerMapper could be applied for locomotion and interaction for VR in confined spaces.