Summary: Researchers say Force Push will give users the ability to move distant objects using an approach for remote object manipulation in virtual reality.
Source: Virginia Tech.
Fans of the Star Wars franchise will have to wait more than a year from now to get their fix of Jedi-laden telekinetic spectacles on the big screen. The as-of-yet-to-be-titled Episode IX, the last installment of the space saga as was envisioned in 1977, won’t be released until December 2019.
In the interim, stalwart practitioners of Jedi ways and other Force-sensitive beings can look to the small screen and thank Virginia Tech researchers for a recently developed virtual reality technique called Force Push.
Force Push gives its users the ability to move faraway objects with Yoda-like calm, nuance, and focus using an approach for remote object manipulation in VR.
“You basically push the object in the direction you want it to move to, just like in Star Wars when the Jedi masters try to move an object that’s placed remotely, they can push or pull it,” said Run Yu, Ph.D. candidate in the Department of Computer Science and the Institute for Creativity, Technology, and the Arts. Yu is first author on the recently published article in Frontiers in ICT detailing the research.
It’s as simple as using subtle hand gestures to push, pull, or twirl objects. Users employ their bare hands using a natural gesture-to-action mapping for object manipulation in a VR setting.
“We wanted to try and do this without any device, just using your hands, and also do it with gestures in a way that’s more playful,” said Doug Bowman, the Frank J. Maher Professor of Computer Science and director of the Center for Human Computer Interaction.
Force Push provides a more physical, nuanced experience than traditional hand controllers allow in VR. It responds to the speed and magnitude of hand gestures to accelerate or decelerate objects in a way that users can understand intuitively.
The ability to respond to nuanced hand movement is due to the technique’s novel physics-driven algorithms. Dynamically mapping rich features of input gestures to properties of physics-based simulation made the interface controllable in most cases. With Force Push, it’s just as easy for users to apply the gentlest of nudges to an object as it is to throw a heavy object across the room. The researchers also believe the physics-based technique makes Force Push more plausible, so that users have a “realistic” experience of these magical powers.
To perform user experiments the team used an Oculus Rift CV1 for display and a Leap Motion was applied for hand tracking. The virtual environment was developed in the Unity game engine, and the native physics engine of Unity was used to drive the physics-based simulation of the Force Push interface.
“Every week we kind of tweak something different in order to make the experience feel right,” said Bowman. “But now it feels really cool.”
Source: Amy Loeffler – Virginia Tech
Publisher: Organized by NeuroscienceNews.com.
Image Source: NeuroscienceNews.com image is adapted from the Virginia Tech news release.
Video Source: Video credited to Virginia Tech.
Original Research: Open access research for “Force Push: Exploring Expressive Gesture-to-Force Mappings for Remote Object Manipulation in Virtual Reality” by Run Yu and Doug A. Bowman in Frontiers in ICT. Published September 28 2018.
Force Push: Exploring Expressive Gesture-to-Force Mappings for Remote Object Manipulation in Virtual Reality
This paper presents Force Push, a novel gesture-based interaction technique for remote object manipulation in virtual reality (VR). Inspired by the design of magic powers in popular culture, Force Push uses intuitive hand gestures to drive physics-based movement of the object. Using a novel algorithm that dynamically maps rich features of hand gestures to the properties of the physics simulation, both coarse-grained ballistic movements and fine-grained refinement movements can be achieved seamlessly and naturally. An initial user study of a limited translation task showed that, although its gesture-to-force mapping is inherently harder to control than traditional position-to-position mappings, Force Push is usable even for extremely difficult tasks. Direct position-to-position control outperformed Force Push when the initial distance between the object and the target was close relative to the required accuracy; however, the gesture-based method began to show promising results when they were far away from each other. As for subjective user experience, Force Push was perceived as more natural and fun to use, even though its controllability and accuracy were thought to be inferior to direct control. This paper expands the design space of object manipulation beyond mimicking reality, and provides hints on using magical gestures and physics-based techniques for higher usability and hedonic qualities in user experience.