Defying Gravity: Towards Gravitoinertial Retargeting of Acceleration for Virtual Vertical Motion in In-Car VR
ISMAR ’25 (IEEE International Symposium on Mixed and Augmented Reality)
Title: Defying Gravity: Towards Gravitoinertial Retargeting of Acceleration for Virtual Vertical Motion in In-Car VR
Authors: Gim, B., Kang, S., Yeo, D., Kim, G., Um, J., Park, J., and Kim, S.
Conference: ISMAR ’25: IEEE International Symposium on Mixed and Augmented Reality
🚗 Project Overview
Defying Gravity proposes a gravitoinertial retargeting technique that repurposes real vehicle acceleration into virtual vertical motion, enabling immersive in-car VR flight experiences without physical elevation.
The method leverages the somatogravic illusion—where forward acceleration evokes an upward tilt—to expand the perceptual range of in-car VR.
Main contributions:
- Introduces a motion cueing algorithm mapping real-time acceleration to vertical pitch via a vertical gain coefficient (k).
- Derives optimal perceptual gains (kₐccel = 2.465, k_dₑcₑl = 1.918) through adaptive psychophysical testing.
- Conducts two experiments evaluating motion sickness, presence, and enjoyment across Baseline, Asynchronous, Theoretical, and Optimal conditions.
Results show that synchronized gravitoinertial cues enhance realism and presence while reducing motion sickness, establishing a perceptual basis for vertical motion simulation in vehicular VR contexts such as flight or climbing experiences.
🔗 Link
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