MorphableUI: a hypergraph-based approach to distributed multimodal interaction for rapid prototyping and changing environments

Nowadays, users interact with applications in constantly changing environments. The plethora of I/O modalities is beneficial for a wide range of application areas such as virtual reality, cloud-based software, or scientific visualization. These areas require interfaces based not only on the traditional mouse and keyboard but also on gestures, speech, or highly-specialized and environment-dependent equipment. We introduce a hypergraph-based interaction model and its implementation as a distributed system, called MorphableUI. Its primary focus is to deliver a user- and developer-friendly way to establish dynamic connections between applications and interaction devices. We present an easy-to-use API for developers and a mobile frontend for users to set up their preferred interfaces. During runtime, MorphableUI transports interaction data between devices and applications. As one of the novelties, the system supports I/O transfer functions by automatically splitting, merging, and casting inputs from different modalities. MorphableUI emphasizes rapid prototyping and, e.g., facilitates the execution of user studies due to easy UI reconfiguration and device exchangeability