Software architecture for multimodal user input -- FLUID. Traditional ways to handle user input in software are uncomfortable when an application wishes to use novel input devices. This is especially the case in gesture based user interfaces. In this paper we describe these problems and as a solution we present an architecture and an implementation of a user input toolkit. We show that the higher level processing of user input such as gesture recognition requires a whole new kind of paradigm. The system we designed and implemented -- FLexible User Input Design (FLUID) -- is a lightweight library that can be used in different kinds of software. The potential application areas include all system where novel input devices are in use: virtual reality, entertainment systems and embedded systems.

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  1. Ilmonen, Tommi; Kontkanen, Janne: Software architecture for multimodal user input -- FLUID (2003)