| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a three-dimensional game device capable of making a player feel the sensation of a time lapse and increasing the variety of a game picture/a demonstration picture. <P>SOLUTION: A virtual time calculation part 120 calculates elapsed time in a virtual three-dimensional space on the basis of the elapsed time in a real space and obtains virtual time. A virtual three-dimensional space computing part 100 computes the position information of a display object arranged inside the virtual three-dimensional space and also computes the position information of a light source such as the sun moving inside the virtual three-dimensional space accompanying the lapse of the virtual time. A three-dimensional computing part 210 performs three-dimensional computation including shading computation for the display object arranged inside the virtual three-dimensional space on the basis of the position information of the light source. Also, the darkness of the night is expressed by depth queuing computation and the moon disappearing in the sky or the like is expressed by translucency computation. In the case that a plurality of game stages of different game settings are provided, the next game stage takes over the virtual time at the end of one game stage. The virtual time can be made to elapse while displaying the demonstration picture. <P>COPYRIGHT: (C)2004,JPO</p> |
