| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily designate a three-dimensional coordinate by using a pointing device by converting a two-dimensional coordinate on a display screen into a three-dimensional coordinate in a three-dimensional virtual space based on the two-dimensional coordinate on the display screen and data that describes three-dimensional virtual space. SOLUTION: A mouse 14 as a pointing device designates a two-dimensional coordinate on a display screen 12a, and a computer system 10 recognizes the designated two-dimensional coordinate. The two-dimensional coordinate on the screen 12a is converted into a three-dimensional coordinate in a three- dimensional virtual space based on the recognized two-dimensional coordinate on the screen 12a and data that describes a three-dimensional virtual space which is stored in a storing part of the system 10. With this, a three-dimensional coordinate is designated only by a two-dimensional plane operation.</p> |
