When space becomes the interface.
I made a large FTIR table with IR light. Used computer vision and an IR pen to integrated a Java drawing program. Projection mapped the program for the users to interact with via a specialized IR pen I designed and 3D printed. Went through several user studies and iterated from results. Designed other interactions and presented in user studies and class. Have since developed the technology further to include adaptive lighting and a non-projector task management system with voice presence. Ongoing experiment.