Geometry Nodes: How to reset rotation pivot point? (After using Transform twice)

[Toleson]

Is there a way to apply Transform node twice in a row and maintaining the original pivot point? I’m attaching a simplified example of the issue. Once there is a second transform node on a geometry, the pivot point gets reset to 0,0,0.

Any tips will be super helpful!

When rotating with the first node, everything is fine:

When adding one more however…

pivot_issue01.blend (910.9 KB)
The file was made in Blender 3.2

[Toleson]

Ok, one workaround is plugging the translation at the very last Transform node in the chain. But it doesn’t always solve the issue.

[zeroskilz]

Order of transform is very important.

This is what a rotate about origin (or “pivot point”) node-group looks like:

… Inverse translation moves to (0,0,0), then rotate, then move it back. Hope that makes sense.

To confuse matters

… this is equivalent, because internally Blender applies the Rotation Before the Translation.

Good luck.

[Toleson]

Oh, I think you can’t imagine how exciting it is to get finally some advice on this and the information about the order of operations, this I haven’t thought would be fixed, but it makes sense. Thank you! I will test it

[zeroskilz]

Apologies, had a closer look at what you are attempting and in your case it would be a lot more convenient to make an instance and use the Geometry to Instance node, like so:

… since Rotate Instance has a Local Space setting, everything becomes simpler (Order matters less… can put Set Position after Rotate Instance and it will still work the same).

Good luck.

[Toleson]

Ahahah, I didn’t know the Geometry to Instance node, that’s a handy one!