| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To realize an intuitive and easy change of setting a display range by displaying a rectangular frame corresponding to the setting of the display area, and by changing the display range corresponding to an operation to the rectangular frame. <P>SOLUTION: A CPU calculates a three-dimensional graph rendering data from an input three-dimensional graph formula E10, and instructs to display a three-dimensional graph G12 based on the three-dimensional graph rendering data on a graph screen W10. When a zoom key is depressed, the CPU instructs to display a zoom frame F10 on the graph screen W10. When the zoom frame F10 is expanded to a zoom frame F12 through the operation of an input pen 9 by a user, the CPU calculates an expansion-to-reduction ratio of the zoom frame F12, and calculates a display range of the graph screen W10 according to the above expansion-to-reduction ratio. Thereafter, the CPU recalculates a three-dimensional graph rendering data based on the calculated display range, and instructs to display a three-dimensional graph G14 on the graph screen W10. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
