US Patent 8992315 Automated enhancements for billiards and the like

Position data is generated. The position data describes a respective current position of each of one or more game objects (e.g., billiard game objects) in relation to a playing surface (e.g., a playing surface of a billiard table) defining a boundary of a field of play of a game involving use of the one or more game objects in the field of play. A graphical interface image is displayed on the playing surface. Whether the position data in relation to the displayed graphical interface image satisfies an input instruction predicate is determined. In response to a determination that the position data satisfies the input instruction predicate, the input instruction is executed on a machine.