Sound Gesture Intelligence
Hand Tracking
Infrared cameras
If you have fast cameras like in the Optitrack Motion Capture System (up to 120fps), you can use the position of your hands (skeleton tracking mode) or those of rigid objects you hold in your hand. You can use the custom «motion-tracking» middleware that sends OSC messages to Max from Motive.
The Fault - Introduction to Optitrack Motion Capture System @ Forum, HfMT Hamburg, Germany.