| 摘要 |
PROBLEM TO BE SOLVED: To plot a graphic in which plural painted-out areas are present on one line at a high speed. SOLUTION: Coordinate and inclination information KD indicating a graphic outline generated by a plotting part 2 is stored in a plotting coordinate storage part 3. A controlling part 4 compares the number of X coordinates with the inclination information KD of each X coordinate before and after one line, and judges whether or not a difference is present between them. When the difference is present, the X coordinates are re-arranged in the order of elevation, and the X address is generated in the order of the small X coordinate by a line insert part 5. The controlling part 4 executes a painting-out rule, and specifies a painted-out area based on the inclination information KD of each coordinate corresponding to this X address, and updates a rank table 42. On the other hand, when they are coincident, the painted-out area is specified by using the set of the X addresses stored in the rank table 42. |
