Abstract. TUIOFX is a novel toolkit for developing multi-touch, multi-user applications for interactive tabletops and surfaces. By seamlessly integrating with JavaFX, TUIOFX provides a low entry barrier for developing state-of-theart applications with multi-user, multi-touch capabilities and allows the crossplatform deployment on various interactive tabletop and surface hardware.
Building multi-touch multi-user applications for Shared Interactive Surfaces is a complex endeavour that requires fundamental knowledge in touch enabling hardware, gesture recognition, graphical representation of digital information and multi-user interaction. While several specialised toolkits help developers in this effort, we identified a variety of challenges with these toolkits, as for example the lack of cross-platform support, the limited number of touch-enabled multi-user widgets, missing documentation, and lacking community support -- all raising the barriers to entry. In this paper, we present TUIOFX, a toolkit for developing multi-touch, multi-user applications for Shared Interactive Surfaces in Java, which tackles all of the identified problems. The sophisticated implementation of TUIOFX adds support for TUIO-enabled hardware and multi-user interaction under the hood of JavaFX, and leaves the well-learned JavaFX API for the developers fully intact -- thus allowing particularly novices a very quick start. In this paper we provide the technical insights, in the concepts and their elegant implementation.
Group Decision Support Systems allow users to faster reach a consensus and help to improve the overall decision quality by structuring and directing group discussions. We present MTEatsplore, a multitouch tabletop application designed to structure interaction and guide group discussion, and thus improve the decision quality when cooperatively selecting an eating opportunity in a group.
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