1. Localization system comprising: at least one laser pointing its beam at arbitrary locations within a three-dimensional space; an object in the three-dimensional space supporting a screen at its top for receiving the laser beam to create a shaped image on the screen; a camera for observing the shaped image on the screen; and computing apparatus for determining location of the object in the three-dimensional space from pointing parameters of the laser and from shape and center points of the shaped image on the screen.