A graphical interface for visually specifying the behavior of combinations of finite-state and continuous-state actors. The state of an actor may be controlled by the states of other actors. The motion of continuous-state actors is constrained by functions represented as, and analogous to, grooves, sockets,...http://www.google.com.hk/patents/US5600774?utm_source=gb-gplus-share專利 US5600774 - Graphical interface for interacting constrained actors
