In this article, we propose a VR-based immersive self-training system for volleyball beginner’s receiving, by which a virtual training environment is given to a practitioner with a head-mounted-display (HMD). Not wearing motion capture markers and haptic devices, a practitioner has free hands to receiving a virtual ball, so that the proposed system is expected him/her to be able to play receiving motion as the same as in the real world, in order to enhance skill upgrading effectively.
In this article, a hybrid type of virtual keyboard with multimodal feedback using a physical tabletop (or any hard plane around the user) is proposed. A user, wearing a VR Head-Mounted-Display (HMD), sees a keyboard in the given virtual world. Tracking his/her finger’s motion on the tabletop, the proposed system determines the key pressed by him/her and gives multimodal feedback to him/her. A pair of changing colors and playing sounds are given to the user as visual and audio feedback, in conjunction with physical tactile feedback from the tabletop. The system is expected to improve performance of keyboard input in the virtual environment.
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