| 摘要 |
PURPOSE:To save the storage capacity and the transmission time of an area data and to facilitate the editing of a complicated irregular area, by dividing the irregular area where plural rectangles are combined into rectangular areas. CONSTITUTION:When first point P1 (PX1, PY1) and second point P2 (PX2, PY2) are inputted, since it is ¦PX2-PX1¦>¦PY2-PY1¦, the input point P2 is corrected to T2=(TX2, TY2)=(PX2, PY1). When third point P3 (PX3, PY3) is inputted, it goes to ¦PX3-TX2¦<¦PY3-TY2¦ from a corrected second point T2 and the third point P3, and the P3 is corrected to T3 (TX3, TY3)=(PX2, PY3). Fourth point P4 (PX4, PY4) is compared with a corrected third point T3, and is corrected to T4 (TX4, TY4)=(PX4, PY3). Fifth point P5 (PX5, PY5) is corrected to T5 (TX5, TY5)=(PX4, PY5) and sixth point P6 (PX6, PY6) to T6 (TX6, TY6)=(PX6, PY5), and the first point P1 (X1, Y1) is corrected to T1 (TX1, TY1)=(PX6, PY1). |
