PT Journal AU Stødle, D Hagen, T Bjørndalen, J Anshus, O TI Gesture-Based, Touch-Free Multi-User Gaming on Wall-Sized, High-Resolution Tiled Displays SO JVRB - Journal of Virtual Reality and Broadcasting PY 2008 VL 5(2008) IS 10 DI 10.20385/1860-2037/5.2008.10 DE Display wall; device-free; multi-touch; parallelized games AB Having to carry input devices can be inconvenientwhen interacting with wall-sized, high-resolution tileddisplays. Such displays are typically driven by a clusterof computers. Running existing games on a clusteris non-trivial, and the performance attained using softwaresolutions like Chromium is not good enough.This paper presents a touch-free, multi-user, humancomputerinterface for wall-sized displays that enablescompletely device-free interaction. The interface isbuilt using 16 cameras and a cluster of computers, andis integrated with the games Quake 3 Arena (Q3A) andHomeworld. The two games were parallelized usingtwo different approaches in order to run on a 7x4 tile,21 megapixel display wall with good performance.The touch-free interface enables interaction with alatency of 116 ms, where 81 ms are due to the camerahardware. The rendering performance of the gamesis compared to their sequential counterparts runningon the display wall using Chromium. Parallel Q3A’sframerate is an order of magnitude higher comparedto using Chromium. The parallel version of Homeworld performed on par with the sequential, which didnot run at all using Chromium. Informal use of thetouch-free interface indicates that it works better forcontrolling Q3A than Homeworld. ER