Ok everything was going good until I hit a wall on these couple curves. I’m trying to learn what the limits are on this set, I think it should work but running out of ideas.
I’m using some technology from here:
problematic_curves.gh (28.3 KB)
updated cleaned up file – slightly
While I’m not necessarily trying to fillet this set, it fails to union. So, maybe I should remove some components and break it down till I figure out using more simple terms… idk…
Just split the two pieces with a plane first…
Glad you posted cause I couldn’t find my post after it created I didn’t add the file yet 
So, that’s interesting, I didn’t necessarily even consider splitting these shapes at the midline, but it’s probably a very reasonably thing to do, and if it helps the maths then… I’ll try it.
But what’s your reasoning with that operation? I’m curious how to word that technique 
Maybe you don’t mean the midline per say…
Actually I meant mirror plane.
I think the Boolean union does not work because of the coincident hemispheres…
I’m not seeing any simple threads showing easy way to do this…
taking a break lol
playing around with the order of operations here, finally getting some better geometry with the union:
I would like to try a different approach however, where I combine the curves, to make a more simplified automatic approach. 
bbl
got it close, but still fighting with this piece:
simplified_approach.gh (16.1 KB)
I’m considering revamping the curves to some other composition. Or turn this thing into something with different constraints / parametrics.
I think Rhino does it easy but GH makes it much harder…
Zoom in on your curve ends. They do not coincide. I moved one curve to the end of the other and the union worked fine in Grasshopper.
Thank you for finding that. I swear I checked that already, and even recreated a couple curves. I’ll have to verify this in a few hrs when I get back to the office. Cheers.
ahhaa bottom left corner
I look forward to fixing this 
So, I put more energy into checking the coincidences or the ends of the curves, but nothing worked. I even decided to over lap them, and still didn’t work.
Ok, so I decide to battle with this, I made sure ‘apparent intersections’ was off, but it was still not easy.
It wasn’t until I figured out a certain sequence that I was finally able to get the solid union to work:
And in the end, what do you do with these letters?
Who said it was letters 
It’s part of a logo I’ve been doing revisions on. And I’m using it to motivate me to learn more about GH
One of the final steps I’ll use is create a midline outline of the logo. But I might just do that manually…
A colleague will probably want a photoshop file. They might want a filled in version and an outline version.
This is all just a reiteration of work I did 11 yrs ago, so while these are revsions, GH is making it more interesting
That’s cool. I like the sound of GH doing toolpaths
But I though GH can’t do ‘loops’ 
…
Well this is using Anemone plugin for the loops but you could also do loops with a python script.
