ForceField is a framework for spatial interfaces, built using Kinect, Processing, a projector and a discarded bridal veil. The program uses OpenCV for computer vision and Java code for space segmentation. Processing is used for the interface. In the demo shown here, ForceField is used as a MIDI sequencer.
ForceField is still being developed. You can follow its progress on this page.
Credit: Omer Shapira and Ohad Ron.