How are made the offset?
Seems easy in 2D but in 3D?
Extremities control the result for have a sort of perpandicular form between them?

Hi Pilou, the offset is created by a kind of "tracing" procedure that marches along the curve and displaces a point sampled from the curve by the given distance.

You can do it on a 3D curve, but the displacement direction will happen relative to a plane. It tends to be more predictable when you do it just on planar curves.

- Michael

Hi Brian, I don't really have any ideas on how to make it more logical...

I mean right now the basic procedure goes like this:

Step 1 - select a curve:



Step 2 - click on Construct / Offset to launch the offset command.

Step 3 - click a little distance away from the curve to create a parallel one going through the point where your mouse is at:



That's all that you do to create a basic parallel curve... It can get more complex if you want to tweak various options or work with more complex curves, but I can't really think how to get more logical steps than that for the simple basic case...

Is there anything that you can pinpoint here that doesn't seem logical?

- Michael