Scaling only the selected vertex group in geometry nodes

Question

I can scale the top of an object by selecting it's vertex group and hitting 'S'

When I try and scale a vertex group in Geometry nodes it seems to scale the entire object instead of just the selected vertex group.

I have my selection set to the vertex group I want.

I've tried uniform

and single axis

I've also tried using offset in this link Adjusting / controlling / moving an objects vertex groups using geometry nodes

Still the scaling is not limiting itself to the selected vertex group.

Answer 1

Scaling is possible with Scale Elements only with Faces and Edges (strangely enough).

So you would have to translate your vertex group to the right domain somehow.

You can do this by simply adding the Capture Attribute and set it to Point.

This captures the selection on a specific domain, which is then interpreted correctly by Scale Elements in the Face domain.

PS: Named Attribute is available since Blender 3.2.
(If you use a lower version, you use the Group Input instead as usual).