Patent ID: 7446767

Claim:
A game apparatus for displaying an object in a game space, the apparatus comprising: light source setting programmed logic circuitry for setting, in the game space, n light sources (where n is an integer equal to or more than 2) for irradiating the object with a light beam; a brightness calculator for calculating, for each of predetermined units forming the object, a brightness vector having as components n illumination intensities respectively added by the n light sources; at least one threshold value storage location having threshold values of the n illumination intensities stored therein, the threshold values being used for dividing a coordinate system for the brightness vector into at least three regions; region determining programmed logic circuitry for determining, for each of the predetermined units, a region including a tip of the brightness vector calculated by the brightness calculator from among the regions obtained via division by the threshold values based on whether or not the illumination intensity of each of the n illumination intensities is greater than, less than or equal to the corresponding threshold value; and display color determining programmed logic circuitry for determining a display color for each of the predetermined units based on the region determined for each of the predetermined units by the region determining programmed logic circuitry, such that the object's display color distinctly varies.