# Question - Creating and inflating complicated ETFE structure

Create ETFE inflated bubbles/membranes that form with my intended structure.
Basically I need to combine the two scripts in the grasshopper file that I attached.

What I have been able to do:

I was able to use a script I got online that was able to make ETFE bubbles along my structure , but it only worked if I used an equation that would subdivide the surface into diamonds…. That is not my goal.
I want to use the structure that I have modeled using grasshopper (which I realize is a bit complicated and there is most likely in easier way to model what my intent was)
I tried to split the surface with the structure but this was too complicated and would not run. I even tried to bake the surface and structure in rhino and then split… Which worked but that when I went to and use “gginflatesurface” extension using bullart but that would not even work for a few of the stuface segments.
I am new to grasshopper and I am finishing up my thesis and would love to understand how to get the surfaces to bubble the structures meet the surface. Please any help is appreciated.
ETFE STRUCTURE GRASSHOPPER.gh (51.6 KB)
ETFE STRUCTURE MODEL.3dm (6.3 MB)

Well … I don’t have your add-ons (plus I work with R5) so here’s a blind date answer:

1. Whatever the Method you are using (relaxation or not) for the Envelope Topology you should arrive to a Mesh and then get a light truss out of that ( shown a W type tri base Mesh meaning that the outer shell is hexagons/pentagons: these Polylines are done via Mesh VV/VE Connectivity ):

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1. Then: if the EFTE Polyline is triangle or quad you can inflate the Surface by moving the mid Point (at 0.5, 0.5) using the related Mesh Vertex Normal. If the Polyline has a higher order and IF we are talking lot’s of lot’s of modules … then a little cheating is a must:

1. The cheating is done as follows:

1. Of course you can things by the book i.e. using K2 for relaxing lot’s of mini Meshes (in real life EFTE is used in rather big structures) … but I strongly advise to cheat: after all your job is NOT to cut the piece patterns (nor to provide the zillion ducts required for that kind of envelope solution [a very fragile one, mind]).

BTW: If you want a C# that does the EFTE stuff in any Mesh … notify.

That said EFTE is an answer to a questiion that nobody asked.

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