I’m surprised I can’t find anything that does this. But almost every 3D software I’ve used has a copy transforms. What’s the beat way to easily copy any or all of the rotation, location, or scale of one object to another.

Copy the parameter and paste it onto the other object.

Well I figured that. It just seems clunky and time consuming for doing many objects.

That's what those icons at the right of the parameters are for:

I was actually trying to see if there was a way to copy transforms from an object. To something at the sop geometry level. The transform SOP doesn't have those icons.

In VEX, you can use optransform() to do this. optransform() returns a matrix, which you could then multiply your SOP by in a Point Wrangle to transform the points:


The Object Merge SOP can also use any arbitrary transform when merging in geometry.

oaboraz
I was actually trying to see if there was a way to copy transforms from an object. To something at the sop geometry level. The transform SOP doesn't have those icons.

In that case, why not just merge all your different geometry and then apply a cumulative transform?

Maybe I'm misunderstanding what you're trying to accomplish, could you elaborate on specifically what you're trying to do?

oaboraz
I was actually trying to see if there was a way to copy transforms from an object. To something at the sop geometry level. The transform SOP doesn't have those icons.

If you're at Geometry/SOP level, you're not working with objects, you're working with basically points. As such, the concept of copying transforms from one object to the other doesn't apply.

As per Houdini's docs, when you're doing transforms within SOPs, you're actually deforming an object, and not transforming it.
https://www.sidefx.com/docs/houdini/basics/objects.html#transforming-objects-vs-surfaces [www.sidefx.com]

I think pretty much every new Houdini user gets confused between Object and Geometry level, given how much work takes place with SOPs.

To answer your query though, if you're applying a transformation using a Transform node, you can stash that change by enabling the Output Attribute on the node (called ‘xform’ by default), and then transferring that attribute to the geometry (not the object!) you want to apply it to. I've attached an example.

Thank you eikonoklastes, this is what I was looking for. Not exactly intuitive, but then again most things in houdini aren't.

did you try 'freeze' from the tab menu?