Polyline or spline elevation change

[Siberian]

I need to draw a polyline (or spline) in the XY-plane, followed by a vertical segment before continuing in the XY-plane again. The challenge is working out the vertical part while still in the top view. There's no way to change its elevation on the fly that I know of.

[Dadgad]

Might it be easiest to draw the two polylines or splines first in plan view, then in an isometric perspective connect them with 3D polylines?

[Tyke]

I need to draw a polyline (or spline) in the XY-plane, followed by a vertical segment before continuing in the XY-plane again. The challenge is working out the vertical part while still in the top view. There's no way to change its elevation on the fly that I know of.

 

If you want all of the line-work to be one object you would have to use a 3D-polyline. I think the easiest way is to do as Dadgad suggested, and join all three lines using the JOIN command. You could still draw 2D polylines with a vertical line joining them. When you then use the JOIN command the result is automatically a 3D polyline.