GAME MACHINE, GAME MACHINE CONTROL METHOD, AND INFORMATION STORAGE MEDIUM

摘要

A game machine capable of expressing a variation of the shade of an object made by the light emitted from a light source with a variation of the position of the light source or a variation of the shape (posture) of the object which lightening the processing load. The game machine displays the scene of a virtual three-dimensional space where a light source and an object are arranged viewed from a given viewpoint. A shade-making object for making the shadow of the object is disposed. The transparency at each vertex of the shadow-making object is determined by the position of the light source and the position and shape data on the object, and a game screen is created according to the determined transparencies. The number of polygons constituting the shade-making object is controlled by the distance between the viewpoint and the object.