Redirected Rotation Aected by Particle Based Weather Conditions
Author
Nielsen, Mikkel Rasch
Term
4. term
Education
Publication year
2014
Submitted on
2014-05-28
Pages
60
Abstract
Dette projekt undersøger en ny anvendelse af redirigeret rotation i virtual reality (VR). Redirigeret rotation er en redirection-teknik, hvor systemet diskret ændrer rotationsforstærkningen—hvor meget den virtuelle verden drejer i forhold til brugerens faktiske drejning—for at styre brugeren uden at det bemærkes. Vi afprøvede, om en partikelbaseret vejreffekt kan maskere denne manipulation: et vinterlandskab med snestorm. I et brugerstudie sammenlignede vi tre betingelser: 1) ingen sne, 2) snepartikler der bevægede sig modsat brugerens drejeretning, og 3) snepartikler der fulgte brugerens drejeretning. 36 deltagere brugte Oculus Rift Developers Kit 1. Vi målte tærskler for rotationsforstærkning, dvs. det interval, hvor ændringer i rotation ikke blev opdaget. Der var en signifikant forskel mellem begge snebetingelser og ingen-sne, men ingen forskel mellem de to snebetingelser. De målte tærskelintervaller var: NoSnow: 1.03–1.41, SnowFlee: 0.89–1.28, SnowFollow: 0.92–1.30. Deltagerne udfyldte Simulator Sickness Questionnaire (SSQ) før og efter. SSQ viste signifikante stigninger i alle kategorier (kvalme, okulomotorik, desorientering og totalscore), hvilket indikerer øget simulator-syge; ingen deltagere klagede dog over køresyge efter testen. Resultaterne peger på, at vejreffekter kan bidrage til redirection i udendørs VR-scenarier og danner grundlag for videre forskning.
This project explores a new way to use redirected rotation in virtual reality (VR). Redirected rotation is a redirection technique that subtly adjusts rotation gain—how much the virtual scene turns relative to the user’s actual turn—to guide users without them noticing. We tested whether a particle-based weather effect could help mask this manipulation: a winter landscape with a snowstorm. We compared three conditions: 1) no snow, 2) snowflakes moving opposite to the participant’s turning direction, and 3) snowflakes moving in the same direction as the participant’s turn. Thirty-six participants used an Oculus Rift Developers Kit 1. We measured rotation gain thresholds, meaning the range in which changes in rotation went undetected. There was a significant difference between both snow conditions and the no-snow condition, with no difference between the two snow conditions. The observed threshold ranges were: NoSnow: 1.03–1.41, SnowFlee: 0.89–1.28, SnowFollow: 0.92–1.30. Participants completed the Simulator Sickness Questionnaire (SSQ) before and after. SSQ scores increased significantly across all categories (Nausea, Oculomotor, Disorientation, Total), indicating more simulator sickness; however, no participants reported motion sickness complaints after the test. These results suggest that weather effects may support redirection in outdoor VR scenarios and provide a basis for further research.
[This abstract was generated with the help of AI]
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