[W.I.P.] Curve Tools plugin

[micheus]

I got some time to work on it again.

I just figured out a way to allow us to create helix using a path as a "axis", so that should help a lot with some kind of cables and these kind of thing.
The Helix option in true isn't a kind of curve, but a tool to create a Bèzier curve in that shape.

It's working, but not exactly the way I would like - be able to draw it as I do with the curves, but for now we just pick a curve in the helix dialog. I still need to work on that in the future.

Here on the Curves plugin window (parametric):


... and here after convert to Wings3D object with material applied :


I noticed an interesting effect when - after create the external cable - I decided to change the twist mode for the "helix" curve. I was using Z-Up at first and when I changed to Minimum some loops just got a little twisted and closer to the main cable.

And...
... as not everything is happiness, something I changed bring me a couple of crashes that I still need to figure out how to fix.