OrbitText: A Hybrid Prediction System for Efficient and Effortless Text Entry in Virtual Reality

Text entry in virtual reality (VR) is a common task, however, it is often hindered by low typing efficiency and physical fatigue. To address these challenges, we present OrbitText, a novel text entry system for VR environments. OrbitText features a dual-handed, minimal-motion 3D interface and integrates an innovative typing prediction model that combines large language models (LLMs) with n-gram models. Our design aims to minimize physical strain while enhancing typing efficiency. User studies demonstrate that OrbitText significantly outperforms mainstream virtual keyboards, achieving higher efficiency, reduced fatigue, and a lower perceived task load.