Specify start point: ;; pick point A
Current line-width is 0.0000
Specify next point or [Arc/Halfwidth/Length/Undo/Width]: ;; pick point B
Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]: A ;; 转ARC
Specify endpoint of arc or
[Angle/CEnter/CLose/Direction/Halfwidth/Line/Radius/Second pt/Undo/Width]: ;; pick point C
Specify endpoint of arc or
[Angle/CEnter/CLose/Direction/Halfwidth/Line/Radius/Second pt/Undo/Width]: ;; pick point D
Specify endpoint of arc or
[Angle/CEnter/CLose/Direction/Halfwidth/Line/Radius/Second pt/Undo/Width ;; 结束 or ....
若BC非切AB
Command: Pline
Specify start point: ;; pick point B
Current line-width is 0.0000
Specify next point or [Arc/Halfwidth/Length/Undo/Width]: A ;; 转ARC
Specify endpoint of arc or
[Angle/CEnter/Direction/Halfwidth/Line/Radius/Second pt/Undo/Width]: S
Specify second point on arc: ;; pick BC弧中点
Specify end point of arc: ;; pick point C
Specify endpoint of arc or
[Angle/CEnter/CLose/Direction/Halfwidth/Line/Radius/Second pt/Undo/Width]: ;; pick point D
Specify endpoint of arc or
[Angle/CEnter/CLose/Direction/Halfwidth/Line/Radius/Second pt/Undo/Width]: ;; 结束 or ....