| 摘要 |
PURPOSE:To enable a series of drawing processing with a simple arithmetic processing by tracking the locus of an auxiliary line passing through initial point coordinates and crossing at right angles in the movement direction of a pen and detecting two intersections on both sides with the circular segment on the initial point coordinate. CONSTITUTION:A figure by thick lines, generated when linearly moving a circle pattern more than diameters 3 dots corresponding to the plot of a visual pen from initial point coordinates 10 to terminal point coordinates 40, is plotted. An auxiliary line intersection detection means is provided to track the coordinates of the auxiliary point which is the intersection between an auxiliary line 23 passing through the initial point 10 and crossing at right angles in the direction of movement and a drawing laster and to detect the points 17 and 10 by comparing with the coordinates of circular segment on the initial point 10. Therefore, the change point of laster development procedure can be given, and the calculation determining the coordinates on the auxiliary line is enough only with multiplication and division. Thus, a series of drawing processing can be performed without performing complicated arithmetic processing. |
