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A quick question, I've been trying to use the geometry nodes to make a simple chain, all I need is a way to reference the points in the curve in a manner I can select half of them to rotate them by 90º in the Y direction; I need some information from the Instances or Points that I can check with a Math node to set up the Selection Booleans, something like an ID number which I can divide and check if its an even or odd number.enter image description here

Any ideas of which field can have this informartion?

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if this is what you want,try such nodes.

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enter image description here

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    $\begingroup$ Yes, it seems to work, thanks a lot! $\endgroup$
    – omiyage
    Mar 13, 2022 at 10:50

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