97. The method of claim 3 , comprising controlling scaling of the detecting and controlling to generate coincidence between virtual space and physical space, wherein the virtual space comprises space depicted on a display device coupled to the computer, wherein the physical space comprises space inhabited by the body.
104. The method of claim 97 , comprising generating on the display device a display including a virtual version of a physical object present in the physical space, wherein generating the display includes generating coincidence between a virtual position of the virtual version of the physical object and the position of the physical object in the physical space.