| 摘要 |
<p>A vertex acquisition unit (2) acquires a vertex from line data (1), which is a set of vertices that constitute multiple lines. A rectangle inside/outside decision unit (3) determines whether the current vertex is located inside or outside of a display window. An inside/outside status change decision unit (5) selects a branch number 1-4 based on the combination of whether the current vertex is inside or outside the display window and whether the previous vertex was inside or outside the display window. A point sequence registration unit (6) performs registration processing based on the branch number and registers the current vertex in a new point sequence storage region (7).</p> |
