eMotion is an app for creating interactions between human movement and electronic visuals. It's been described as Adobe Illustrator on acid.
Described simply, eMotion is a physics-based animation system that uses human motion to interact with projected graphics in real time. The open source software, originally built by Mondot back in 2006, allows users to decide how lines, points, letters, grids, or whatever visual they choose interact with certain types of motion. Mondot describes it succinctly: “Think of it as Adobe Illustrator on acid.”