1. A pointer control apparatus comprising: a first input device that provides a position signal expressed using a first coordinate system associated with the first input device; a second input device that provides a position signal expressed using a second coordinate system associated with the second input device; a pointer generation system that generates for display in a common display space having a common display coordinate system a first pointer associated with the first input device and a second pointer associated with the second input device; a mapping integrator processor configured to compute the position of the first pointer within the display coordinate system based in part upon the position signal of the first input device and based in part upon the position signal of the second input device, and configured to compute the position of the second pointer within the display coordinate system based in part upon the position signal of the second input device and based in part upon the position signal of the first input device; the mapping integrator processor being further configured to define a dynamic boundary within the common display coordinate system based on knowledge of the respective position signals of the first and second input devices and to compute the positions of the first and second pointers such that each is confined to a different side of the dynamic boundary within the common display coordinate system.