I have made this shape in geometry nodes. How would I go about making a selection of just the outer edges excluding all the other edges within the shape?
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$\begingroup$ Do those cells have faces? $\endgroup$– KuboåCommented Jan 24, 2023 at 14:20
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1 Answer
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Assuming those cells are filled with faces, there's an easy-to-utilize difference between the outer edges and the inner ones: outer edges belong only to one face, while inside edges are always part of at least two. We can make a selection based on that distinction with the help of the Edge Neighbors—Face Count socket:
