| 摘要 |
<p>PURPOSE:To evade the unnecessary operations for change of a display area by performing two operations to point a viewing point for change of the display area and to point a studying point via a CAD operator through the viewing point pointing operation only. CONSTITUTION:A picture data storage means 1-6 stores the picture data, a viewing point input means 1-1 inputs the coordinates of the studying point of the picture data stored in the means 1-6 as the coordinates of a viewing point, and a picture data display means 1-2 displays a display area that is specified by the viewing point pointed by the means 1-1 out of the picture data stored in the means 1-6 on a screen. Then a display control means 1-3 controls the display of the picture data carried out by the means 1-2, and a CAD data production means 1-5 produces the CAD data which form the picture data stored in the means 1-6. Furthermore an action control means 1-4 controls the working of the means 1-5 based on the data needed for production of the CAD data inputted via the means 1-1. Thus it is possible to evade the unnecessary operations for change of the display area of the picture data.</p> |
