| 摘要 |
PURPOSE:To eliminate unnecessary linear display by leaving a display area as it is and enlarging a drawing area with one size when a polygon is clipped and drawn. CONSTITUTION:A drawing area storing means 1 stores the coordinates of the drawing area and a drawing graphic judging means 2 judges whether a drawing graphic is a line segment or the polygon. Then, a drawing area correcting means 3 corrects the coordinates of the drawing area, which is outputted from the drawing area storing means 1, to the coordinates of the drawing area which is larger by one size. When a judged result is the line segment, a selecting means 4 selects the coordinates of the drawing area and in the case of the polygon, the coordinates of the corrected drawing area are selected. Then, a drawing data generating means 5 executes the clipping of the drawing graphic according to the coordinates of the selected drawing area and generates drawing data. The generated drawing data are drawn only to the display area by a graphic drawing means 6. Thus, the unnecessary line segment of the polygon, which is divided into >=two parts by the clipping, is not displayed. |
