Apply pressure on multiple surfaces

Grasshopper Kangaroo
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1

Hello,

I’m looking to create a parachute in 3D so I created all the surfaces which composed it and now I would like to apply wind in it. I make a code on grasshopper but the wind is applied just on the 1st surface I selected when select the multiple surfaces.
It looks like this is around the “Entwine” button that something happens. Do you have any suggestions to apply wind to every surfaces ?
Then I would like to have just some specifics points that I selected (last picture) and I would like to have just those points as anchor points but I don’t know where can I put it.

Thanks a lot for your help.

Malo

Wind on one surface
Wind on one surface649×391 239 KB

Grasshopper code
Grasshopper code2552×946 396 KB

Specific points
Specific points1920×461 62.7 KB

Grasshopper version vent.gh (15.3 KB)
Parachute.3dm (135.3 KB)

2

Hi Richard and welcome on board. Try to join and weld the meshed surfaces. You can use the Mesh Join and Weld Mesh components, or, the Combine&Clean component that comes with Kangaroo2:

2025-07-04 12_34_01-Apply pressure on multiple surfaces - Grasshopper _ Kangaroo - McNeel Forum — Mo
2025-07-04 12_34_01-Apply pressure on multiple surfaces - Grasshopper _ Kangaroo - McNeel Forum — Mo1589×693 133 KB

Also, it helps to share the relevant file in the future :slight_smile:

3

Thanks a lot ! I will try it soon. I just upload my files :slight_smile: