| 摘要 |
<p>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 on a time axis are respectively displayed as elliptic marks M1, M2, M3, M4 on the ground. With a peak P as a boundary, the marks are changed in an enlarging direction in a first color in the upward course of the ball, and the marks are changed in a reducing direction in a second color in the downward course of the ball.</p> |
