| 摘要 |
PURPOSE:To designate the writing inhibition and to prevent the double writing by sorting the divided patterns of a closed area to be painted according to the forms, the prescribed apexes, etc. and setting a boundary write control parameter to a boundary side. CONSTITUTION:A closed area to be painted is divided into four triangles (123), (134), (145) and (156), and each of these triangles is divided into upper and lower triangles (a) and (b) in the scanning direction. Then those four divided triangles are sorted by their forms and the positional relations between the boundary sides and a prescribed apex. A table is provided to set a boundary control parameter to said boundary side. When the face of the closed area is painted, a boundary write control parameter to the boundary side is read out of the table for designation of the write and its inhibition of the boundary side. Thus the painting is carried out with a prescribed unit pattern by means of an exclusive OR mode. In such a way, the double writing at a boundary side is prevented. |
