| 摘要 |
PURPOSE:To shorten the processing time of a painting out by dividing a sector graphic into a section surrounded by a curcular arc and a chord and the section of a triangular part surrounded by two straight lines and a chord and painting out respective sections. CONSTITUTION:When painting out the section surrounded by the circular arc C1 and the straight line L1, the first straight line coordinate generating section 30, the circular arc coordinate generating section 32 and the straight line drawing section 36 of a painting out control section are painted out by making a Y coordinates the same parameters. When painting out the section surrounded by the straight line L1, the straight line L2 and the straight line L3, the coordinate generating section 30, a second straight line coordinate generating section 31 and the drawing section 36 are painted out by making the Y coordinates the same parameters. In this manner, by using two circuits for obtaining a X coordinate with respect to the Y coordinate of the straight line and one circuit for obtaining the X coordinate with respect to the Y coordinate of the circular arc and the drawing circuit drawing a straight line parallel to a basic axis, a circuit having the high speed painting out function of a sector graphic can be provided. |
