How do I pass values to objects via Geometry Nodes?

Support Modeling
1

Hi there,
I have two objects ( A and B) and want to pass the (neg Y) rotation from A one to B. But the Geometry Node Modifier is on another object (C) which motions are “driven” by object A.
Is it possible to output the rotation to an object that isn’t the carrier of the GNModifier?

2

I don’t have much experience with this myself, but from my limited understanding, I think this sounds like the perfect use case for drivers.

I have linked to the documentation below, I don’t have time to write full instructions right now, but I will take a look later:

3

Would need to see your file but named attributes might be the geonodes way to go.

4

As I’m diving into GN currently, I’d like to solve it that way. It’s kind of C4D’s xPresso which I really loved to work with.

5

image
image2894×1376 1.06 MB

The strainer in the front (light green part) is driving the movement of the middle hydraulic cylinder. The RangeMapper ensures that the first Cylinder is pressed out first and then the second follows. The left strainer (blue) should perform the same rotation (neg Y) as the roght one. The GNModifier is one the secont cylinder.
The whole hydraulic press will be mirrored to the right side later.

6

like this maybe?

Well, Id make a separate container for the geonode and drag in the objects you want to transform?

Hope that helps but you may have to be a bit clearer about the animation.

7

But I suspect what you need maybe this new constraint.

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image2011×1090 505 KB

Here, I pass the ping pong value as an attribute rot (stored on the plane container) to the cube.

and here with rotation

make sense>?

Hope that helps

8

This is what I’m after. I guess it’s the Transform Instances Node I totally missed. Thanks for your help, mate!