| 摘要 |
PURPOSE:To prevent blur of edges by using the equation of a plane calculated from apexes of a polygon to obtain the Z-coordinate from X and Y-coordinates at the time of paintingout of the inside of the polygon as well as plotting of an edge line with respect to plotting of the polygon with edges. CONSTITUTION:A plotting plane calculating means 2 calculates the coefficient of the plane equation from apexes of the polygon. A Z-value calculating mean 5 uses this plane equation to calculate the Z-coordinate from X and Y- coordinates of a designated pixel position. A painting-out plotting means 3 which paints out the inside of the polygon as well as an edge plotting means 4 which plots an edge line between two continuous apexes of the polygon acquires the same Z-coordinate for the same pixel position by the Z-value calculating means 5. Consequently, edges are plotted after painting-out plotting to certainly plot the edge. |
