Geometry Nodes: how to get the radius of a curve at the point where a branched curve is attached?

I’m changing the radius of the main curve along its length, and I distribute branched curves, so I need to start each branched curve with the radius of the main curve at the point where it is attached.

I have converted all curves to strip lines of faces and each branched curve is attached to some polygon, so the polygons become fatter or slimmer according to the curve radius.

Do you mean something like this?


branch_radius.blend (871.1 KB)

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Very good example of how to capture the radius, thanks!

Now I can move on to the next problems…