[Sketcher] UI/UX discussions for joining B-Splines

[paddle]

Or this if you like it :

bsplinej.png (96.77 KiB) Viewed 1058 times

[jnxd]

Or this if you like it :
bsplinej.png

This may work if it's visible clear at 24px.

[jnxd]

Bumping this because I'm looking for testers for the feature so I can get some input of how it's working for people who regularly work with B-Splines, in FreeCAD or elsewhere. I guess this is more relevant and visible on Open Discussions so if I don't get much input here I'll post there as well.

Right now the following things are working:
0. If the curves are not b-splines, they'll be made b-splines before joining.
1. If two end points of two curves different already have coincident constraint on them, the join replace them with a single curve. There will be a max multiplicity knot at the connection point .
2. If the points are not constrained to be coincident, it will move the second selected point to the first and then join.

[Kunda1]

Heads up: If anyone on Linux wants to easily test this PR it's possible to do through the freecad-ppd snap package.

Install

If you already have the 'edge' version installed all you need to do is:
snap refresh freecad-ppd --channel edge/sketcher-6507-join-curves

If you don't have 'edge' installed:
snap install freecad-ppd --channel edge/sketcher-6507-join-curves

Note: to return back to using the normal 'edge':
snap refresh freecad-ppd --channel edge

Special thanks goes out to @ppd for setting up the Snap package to test individual PRs like this.