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Often when modeling I will transform with the 3D Cursor as my Pivot Point. This is very useful, but I don't know what the equivalent method would be using Geometry Nodes.

How can I scale or rotate geometry in my node tree based on a known point? (The point could be specified by ID, for example.)

I imagine it's a simple thing to do, but how to do it with GN is not obvious to me. Thanks.

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Basically you can control any center for rotation and scaling via an vector input.

enter image description here

In case of scaling, you can use this vector directly as Center for the node Scale Elements.

In case of rotation, you use the vector as Center in combination with the node Rotate Vector and Set Position.

If you want to rotate or scale instances, you can do so as follows:

enter image description here

Here I use the nodes Rotate Instances and Scale Instances, respectively, and a vector as Center.

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    $\begingroup$ Very handy! Thank you for including an explanation for instances too. $\endgroup$
    – Mentalist
    Commented Jun 27, 2022 at 17:58

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