Most multi-person tabletop interfaces use a single projector to create a table-sized display. The resulting low display resolution prohibits many interesting applications, such as collaborative reviewing of text documents. T3 is a novel Java toolkit that uses multiple projectors and blending to create a seamless highresolution tabletop interface. It allows objects to be positioned and oriented in a single large coordinate space and handles multiperson input event streams. T3 allows researchers to create prototype multi-person tabletop applications quickly, and enables experimentation with a new range of tabletop applications that previously have been very difficult to create
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