Thomas asked me that very same question here (see Mar. 12 at the end):
With just basic tools, a saved scene with current drawing axes and an undo.
Oh and 3D Polylines do explode into edges.
Drag ‘Freehand’ plus [Shift] to create the line.
See if it looks like just one segment. If so, good
Explode the one segmented line into an edge (menu Edit > somewhere down is the selection > context menu with lots of options)
Change axes along the edge, (I did blue along the edge, to “match” Sam’s script) and save a scene with axes!
Now undo the conversion to get back the 3D Polyline.
You now have one segment of the horrible line and its axis captured in the scene.
- Make the line into a component.
- Scale the component to length, inferencing on an endpoint of a parallel edge, length 1m.
(you need to make the selection 2D when scaling, Just select some crossing dummy edge with it.)
The perfect length isn’t that important anymore when applying Sam’s script. It stretches components to fit the edges lengths.
Not interfering dashed lines is also possible, just like the centerline in the file.
Copy the component ceveral times, making them all unique, to be able to apply different colors.
Even when model is set to ‘all the same’.