1. A system for computing output using a non-contact input signal, the system including: a non-contact device including a depth-capable sensor operative to acquire depth data of a scene and generate a temporal series of depth maps; a computer processor in communication with the non-contact device for operating a non-transitory computer-readable program stored on a tangible storage device, including: a localization module operative to localize a subject using information received from the device; a control signal determination module operative to generate at least one volumetric attribute based on depth data determined from the series of depth maps; a processor operative to implement the modules; and, an output device in communication with the processor and being operative to communicate an output based on the volumetric attribute.