algorithmic modeling for Rhino
i've just started using grasshopper and i'm having some problems with this file.
I'd like to make this structure inflate and outflate, but when i try to put a U Force onto few points belonging to the curve generated by kangaroo physics, the seconda kangaroo physics command is in error.
1) how can I make the uforce only interact with the upper points of the structure?
2) why it leads to an error?