Grasping Techniques With Hand Tracking in Virtual Reality and Its Effect on the Sense of Presence
Sammanfattning: Interactions in virtual reality are mostly done using handheld controllers, but hand motion tracking is becoming popular as an alternative. This study explores different types of grasping techniques with hand motion tracking, for objects that should be held in a specific way in order to be used. Can the same techniques and interaction behaviors be used with hand motion tracking as with physical controllers, or will there need to be adjustments made? Do different grasping techniques change the sense of presence while interacting with objects through hand tracking in virtual reality environments, and which grasping technique is preferred for hand tracking in VR? A common grasping technique in games, using handheld controllers, is that objects automatically snap into the right grip when the user gets close enough. In this study, user tests were conducted to compare how this kind of assisted grasp compares to the user instead being visually guided to how to grasp the object, in the sense of feeling of presence, using hand motion tracking. The results suggest that an assisted snap grasp can be used with hand tracking in VR without too much impact on the sense of presence, as it was the preferred grasping technique in this study. The guided grasp was not as successful as the snap grasp, since it was perceived as too restricting. The results don’t necessarily mean that no kind of guided grasp would work, or even be preferred over an assisted snap grasp. A guided grasp might work well if it’s not too strict and the design accommodates the many different ways people usually interact with objects.
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