Find tree braches of objects that are in the boundary

[m.matin96 (Mahsa Matin)]

Hello everyone,
I have surface in grasshopper that divided into subsets contain 4 surfaces. and I have a boundary that is on this suface. I want to find the tree braches that are within this boundary. what should I do?
Boundary.gh (16.7 KB)

[Joseph_Oster]

Your code is far more complicated than it needs to be.

Boundary_2023Sep18a.gh (8.8 KB)

[m.matin96 (Mahsa Matin)]

Thank you, but I want to keep the state where there are four cells in each branch.Do you know what I mean?

[m.matin96 (Mahsa Matin)]

I want these branch pathes.

[Joseph_Oster]

@m.matin96

I want to keep the state where there are four cells in each branch.

I see no reason for that but if you must, you can add the purple group (below):

Boundary_2023Sep18b.gh (19.0 KB)

If you must make it complicated, I won’t follow your lead,

[m.matin96 (Mahsa Matin)]

Thanks