Hello here,

From time to time I want to create perfect symetry curve, and I don't really find a fast workflow for doing it. I don't know how this kind of 'tool' works in
nurbs software, but here's maybe an idea that might work. (but as usual it's probably way more complicated than I though).

As my english is not that good, I'm trying to illustrate it, but it's not an easy task :P.

So here's my curve creation process.



(1) starting point
(2) second point
(3) I draw a vertical guideline G1
(4) I pick the third point on this guide line

... and now I have a first question :

Why I can't use the point (2) as snapping start for a new guide line ? Is there any reason why I can't use construction curve points as snapping target ?

If I could do it, I can draw the G2 guide as showed in the second image



and then, it would be maybe possible to show some kind of symetry helper on this guide line ? (the sym tag).

That said, I'm not sure if it's the easier workflow to draw symetric curve.

For the moment I just draw the curve roughly a fisrt time, trim it in half, mirror it, than redraw an new curve over it (using the existing snapping construction points) ... it's not super handy ... but maybe there is some easiest way allready, so I'm listening :)