Inflated Surface Catmull Clark

I am very new to using grasshopper but wanted to create an inflatable facade that I will be able to adjust the size. I started by creating a mesh from an offset then I run the Catmull Clark command on the mesh but it created a solid shape that doesn’t follow the edge of the original surface.



Here are some examples of the inflated surfaces I am looking to create from a base surface in my future models.

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It would be helpful for a solution to this problem I’m currently having or if there is a better way to get to the result that would I desire.
Inflate Trial.3dm (157.8 KB)
Inflate Trial.gh (10.2 KB)

Have a try this with Kangaroo2.


Inflate Trial_re.gh (13.3 KB)

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The simulated approach @HS_Kim shows will give a more realistic inflated shape, but if you just need a quick approximation you can also offset the interior vertices of a quad mesh like this:


offset_cc.gh (9.1 KB)

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