| 摘要 |
<p>A vertex processing unit is provided for labeling each selected vertex dot as a vertical or horizontal attribute dot based on the direction of a side vector terminating at the vertex dot selected and that of a side vector originating from the vertex dot selected. A contour line segment processing unit is also provided for labeling each edge dot selected from a side as a vertical attribute dot if the y coordinate of the edge dot selected is different from that of a previous edge dot and that of a vertex dot located at the terminal point of the side, or otherwise, as a horizontal attribute dot. Contour color data are defined for the dots labeled as vertical or horizontal attribute dots. And inner color data are defined for the dots existing between an odd-numbered vertical attribute dot and an even-numbered vertical attribute dot, which is next to the former dot, on a selected scan line parallel to the axis of x coordinates, except for horizontal attribute dots. <IMAGE></p> |
