I’m trying to figure out a way to do something sort of “Voronoi-ish” with curves, and am running into problems.

Sketch of the general idea:


Ideally, I would like to take a series of curves, run a script on them, and have them converted into a volume (with smooth joins where they intersect). I tried a few script ideas, but I’m not sure I’m thinking the problem through correctly.

Failing this, I’ve been trying to create paths along the curves. But now I’m not sure how to draw one of the curves I need to do the blend. For example, in this file, I’d like the red sweep to merge smoothly with the gray sweep.



To do this blend, one edge is easy - I can select the end of the red sweep. The problem is the curve on the surface of the gray sweep.

I tried projecting the selected edge to the gray sweep, but I really need to expand it along the tangent of the gray sweep, and I can’t figure out how to do that.

Is there some clever way to do this?