Tracking approaching or hovering objects for user-interfaces

A computer readable storage device comprising executable instructions that, in response to execution, cause a system comprising a processor to perform operations, comprising:

• determining angle data representative of an angle by which electromagnetic radiation intersects a user interface, wherein the electromagnetic radiation originates from a source that is remote from the user interface;
• determining location data representing a location of an object in proximity to the user interface based on the angle data;
• and
• mapping the location data to coordinate data representing a first coordinate on the user interface that corresponds to the location of the object.

A method, comprising:

• determining, by a system comprising a processor, angle data representing an angle by which electromagnetic radiation originating from a source remote from a user interface device intersects the user interface device;
• determining, by the system, location data representing a location of an object relative to the user interface device based on the angle data;
• and
• translating, by the system, the location data to coordinate data representing a first coordinate on the user interface device that maps to the location of the object.