Curve Boolean on open curves in grasshopper?

Hello forum,

I have a seemingly simple problem, but since I am not very experienced in GH, I don’t seem to find a solution. Maybe someone here can help?

I have a set of coplanar open curves and I would simply like to get their outline using GH, as if you would by pressing on the “outside” in the CurveBoolean Command in Rhino. Like so:


I don’t care about closing curves inside the closed curves for now.

There seem to be loads of loosely similar topics in the forums, but after hours of searching I still couldn’t find one that fit my particular problem:

The boolean region component doesn’t work, because they are open curves.
I though with the boundary component I could get there but it didn’t work either… I have even managed to shatter the curves at their intersections but the boundary component still won’t do it.

Is there a way to do it with the standard GH components? If not, does anybody have a script that would work (I don’t really know how to make one, so…) ? or know any plugins for Mac?

Thanks in advance for any help :slight_smile:

You can use Heteroptera Geometric Region


Works like a charm! Thank you very much for the quick answer!

Hey btw… for any one who wants it:

I maybe found a rudimentary way to do it without having to download an entire plugin…

It’s based on several forum posts… dunno, might not be as reliable as Heteroptera though…

1 Like

Many know some way like this. The issue is the slowness of area + split surface + region union when the amount of things is more.

1 Like

I’ll remember that! Thanks :slight_smile: