Aachen University, Germany demonstrated an interesting iOS-based application this week at MWC. The application utilises multiple iOS devices as display exptensions to create one large multitouch display. The really interesting thing about this setup is the way that the screen positioning is calculated. During set-up, all but one of the displays shows a visual code. An image is taken of the arrangement with the final, control device which then calculates the relative positions. The final device is placed into the array and set by hand. The result is impressive!