| 摘要 |
PURPOSE:To simplify and efficienlty perform the plotting processing of the end point and vertex in the subject system. CONSTITUTION:A vertex table memory 20 for storing a vertex table and a table preparing section 21 which prepares the vertex table against the memory 20 by registering flags indicating the processing modes of segment coordinates, end points, and vertices on the basis of input data are provided and, at the same time, a segment processing section 22, end point processing section 23, and vertex processing section 24 are provided in a plotting processing section 7. Then, when the section 22 performs a segment process by referring to the vertex table, an end point process or vertex process is performed by calling the section 23 or 24 in accordance with the statuses of the flags. |
