| 摘要 |
PURPOSE:To attain the painting-out processing of a graphic with a small quantity of memory by investigating the coordinates at a bending point and repeating to execute the painting-out part of the graphic by limiting the part into a certain scope. CONSTITUTION:A graphic composed of a border line restored from the bend of the graphic is divided by an area (line buffer) 7 having a certain width. A difference GY=Y-YB of Y coordinates of a point (X, Y) obtained when the border line restored in the divided area occurs and a point (XB, YB), which is preceding one point, is obtained, the point (XB, YB) is made into a discriminating point, when the relation of GY*FF>0 is present between the Y coordinates which are preceding one piece of coordinates and GY, and the section between the discriminating points is painted out. |
