| 摘要 |
PURPOSE:To eliminate the calculation time for an unnecessary area by calculating and displaying picture element data spirally about an aimed point that an operator specifies or preferentially in a necessary area. CONSTITUTION:When the operator inputs the aimed point, its data is inputted and stored in a main storage, and the path of the calculation of the picture element data is determined according to the aimed point data. For this calculation and display, only the necessary area including the aimed point is given priority to other areas and what path in the necessary area is employed for the calculation is freely determined. In this case, a spiral path which spreads centering on the aimed point is defined and the necessary area expands centering on the aimed point as the calculation is advanced along the spiral path. When the spiral path is determined, its data is stored in the main storage or an auxiliary storage device. Consequently, the time of operator's trial-and-error can be shortened. |
