We're using a
system called blacktrax. It is realtime
tracking using IR emitters and 9 motion capture cameras. Each set piece has 6 LEDs in them that blink out a
binary identifier. The cameras pick them up and
send the coordinates to the
media server. In d3 (the
media server) we have a 3d object for each of them and have placed each
LED on that object so it can calculate the location of the model. Then the projectors are just cameras in the 3d environment. It's active mocap (and a modified
system).