| 摘要 |
PURPOSE:To obtain the plotting system capable of accurate plotting without blurring the edge of polygon by providing a frame buffer and a Z buffer, an edge area specification memory, a flag writing edge plotting means, and a paint-out area plotting means. CONSTITUTION:This system is provided with the frame buffer and the Z buffer 4, the edge area specification memory 2 representing whether the area is the edge plotting area or not, the edge plotting means 1 performing the edge plotting on the buffer 4 and writing a flag showing the edge area in the memory 2, and the paint-out area plotting means 3 referring to a flag written in the memory 2 and performing painting out only on the area where no flag of the frame buffer and the Z buffer 4 is written. Since the plotting of the painting out is not performed on the edge section of the edged polygon, the phenomena of discontinuing and blurring edges can be evaded. |
