1. A system comprising: a) a first plurality of predetermined light sources disposed in an asymmetric substantially linear pattern; b) a photodetector configured to detect said first plurality of predetermined light sources and generate photodetector data representative of the positions of said first plurality of predetermined light sources; c) a controller configured to identify a derivative pattern of said first plurality of predetermined light sources from said photodetector data, wherein said derivative pattern is indicative of the position of said photodetector; d) a remote control, said photodetector being in said remote control; wherein said controller is further configured to determine an absolute position of said remote control with respect to a reference location, and wherein said system is coupled to a display that shows an image substantially defined by a first and a second orthogonal axes, and wherein said controller is configured to generate signals for rendering said display, said signals being a function of said absolute position of said remote control in a third axis, said third axis being orthogonal to said first and second orthogonal axes.