| 摘要 |
<p>PURPOSE:To attain the movement of a display range by as much as an arbitrary quantity in an arbitrary direction within the range of virtual screen data by as much as the moving quantity of the range displayed on a screen in the virtual screen data by determining the difference between the coordinates of a pointed point and the coordinates of a center mark and determining the above-mentioned moving quantity. CONSTITUTION:The displaying of a part of the virtual screen data on a display 2 is executed by announcing the range (coordinates) desired to be displayed to a computer system 1. The coordinates of an arbitrary point are announced to the computer system 1 when the arbitrary point on the screen is picked by a pointing device 3. If, therefore, a memory devices 4 holds the virtual screen data, such moving quantity as to determine the pointed point as the center of the display range is determined from this display range and the coordinate value at the pointed arbitrary point of the display range by the pointing device 3 and the display range displayed on a display 2 can be changed by using this quantity. Thus, the moving of the display screen by the arbitrary quantity in the arbitrary direction within the range of the virtual screen data is executed.</p> |
