[W.I.P.] Curve Tools plugin

[micheus]

It's still not ready for upload, but I have to share the progress...

I made a small optimization to the code, but still some dense mesh can make Wings3D a little laggy if we do interactive changes.

Best practice would be scale the tri-parted object closer to what we need and then apply it to a curve already ready to receive it.

I made another set of tri part objects for my tests:






I added the scale and curvature modifier to it too, so now we are going to create interesting shapes like horns.
This was the first tri part object with no plane boundaries in the weldable area, so I found it's still a little buggy, but I'm just having fun playing with this stuff.





Try to model this using the default tools we have available.