| 摘要 |
PROBLEM TO BE SOLVED: To provide the real thrill of operation with the operation support of a computer and a user's own operating skill, added thereto. SOLUTION: The height of a ball moving on a track passing through present moving positions E1, E2, E3, E4, etc., after a batter B hits back the ball is determined. For instance, future moving positions E11, E21, E31, E41 respectively positioned ahead of the present moving positions E1, E2, E3, E4 are displayed as elliptic marks M1, M2, M3, M4 on the ground. With a peak P as a boundary, the marks are displayed in a first color in the upward course of the ball, and the marks are displayed in a second color in the downward course of the ball. |
