An Evaluation of Strategies for Two-User Redirected Walking in Shared Physical Spaces (bibtex)
by Mahdi Azmandian, Timofey Grechkin, Evan Suma Rosenberg
Abstract:
As the focus of virtual reality technology is shifting from singleperson experiences to multi-user interactions, it becomes increasingly important to accommodate multiple co-located users within a shared real-world space. For locomotion and navigation, the introduction of multiple users moving both virtually and physically creates additional challenges related to potential user-on-user collisions. In this work, we focus on defining the extent of these challenges, in order to apply redirected walking to two users immersed in virtual reality experiences within a shared physical tracked space. Using a computer simulation framework, we explore the costs and benefits of splitting available physical space between users versus attempting to algorithmically prevent user-to-user collisions. We also explore fundamental components of collision prevention such as steering the users away from each other, forced stopping, and user re-orientation. Each component was analyzed for the number of potential disruptions to the flow of the virtual experience. We also develop a novel collision prevention algorithm that reduces overall interruptions by 17.6\% and collision prevention events by 58.3\%. Our results show that sharing space using our collision prevention method is superior to subdividing the tracked space.
Reference:
An Evaluation of Strategies for Two-User Redirected Walking in Shared Physical Spaces (Mahdi Azmandian, Timofey Grechkin, Evan Suma Rosenberg), In Proceedings of Virtual Reality (VR), 2017 IEEE, IEEE, 2017.
Bibtex Entry:
@inproceedings{azmandian_evaluation_2017,
	address = {Los Angeles, CA},
	title = {An {Evaluation} of {Strategies} for {Two}-{User} {Redirected} {Walking} in {Shared} {Physical} {Spaces}},
	isbn = {978-1-5090-6647-6},
	url = {http://ieeexplore.ieee.org/abstract/document/7892235/},
	doi = {10.1109/VR.2017.7892235},
	abstract = {As the focus of virtual reality technology is shifting from singleperson experiences to multi-user interactions, it becomes increasingly important to accommodate multiple co-located users within a shared real-world space. For locomotion and navigation, the introduction of multiple users moving both virtually and physically creates additional challenges related to potential user-on-user collisions. In this work, we focus on defining the extent of these challenges, in order to apply redirected walking to two users immersed in virtual reality experiences within a shared physical tracked space. Using a computer simulation framework, we explore the costs and benefits of splitting available physical space between users versus attempting to algorithmically prevent user-to-user collisions. We also explore fundamental components of collision prevention such as steering the users away from each other, forced stopping, and user re-orientation. Each component was analyzed for the number of potential disruptions to the flow of the virtual experience. We also develop a novel collision prevention algorithm that reduces overall interruptions by 17.6\% and collision prevention events by 58.3\%. Our results show that sharing space using our collision prevention method is superior to subdividing the tracked space.},
	booktitle = {Proceedings of {Virtual} {Reality} ({VR}), 2017 {IEEE}},
	publisher = {IEEE},
	author = {Azmandian, Mahdi and Grechkin, Timofey and Rosenberg, Evan Suma},
	month = mar,
	year = {2017},
	keywords = {MxR, UARC},
	pages = {91--98}
}
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