| 摘要 |
In order to realize the smooth display of a fielder's ball-catching movement, determination of a collision between a batted ball and a fence by an easy method, and an accurate hidden-face treatment for polygons which are located very close to each other, virtual area producing means 31 is provided to produce a collision area for collision determination at a position away from the picture of a ball for a predetermined distance, and determining means 32 is provided to determine at which position in the collision area a fielder is located. When it is determined that the fielder is located in the collision area, picture changing means 33 gradually changes the posture of the fielder from a waiting state to a ball-catching state. <IMAGE> |
