How could I get/set the absolute position of an object in geometry node? I could use the Object info and manually select the current object to get its position, but it's tedious to do that if I want to apply it to multiple objects.
I found some workaround below (see my answer), but they are not perfect: they fail when the object is scaled (at least negatively), and require either the existence of dummy objects or I need to manually select the current object.
WARNING: if you scale the object, the setter will not work properly. I don't know how to fix that without applying the scale first or using Object Info by manually selection the current object (see last part of the answer, that, unfortunately can't work when the scale is negative).
As far as I know there is no way to get the info of the current object (which is a bit sad, let me know if there is a way to do that). But I found a workaround to get/set the absolute position of an object: add a dummy object to the scene (you can use any object, even if it's location is not at (0,0,0)) and then exploits the Relative/Absolute option of object info: if you know where a given object is located, and how you are related to this object, then it's quite easy to get the current position of the object. Then, you can just translate the object to reinitialize its position to (0,0,0), and translate it again to set its position absolutely:
Demo:
WARNING: if you scale the object, the setter will not work properly. More precisely, the transformation will automatically move towards the dummy object when the scale goes to 0. This is because blender will multiply the position of the points by the scale, so I guess one would need to scale the transformation by the inverse of the scale to balance this effect… unfortunately I know no way to avoid that without manually choosing the current object. And even in that case, this does not work when the scale is negative (even with an abs node) as the scale output of Object info seems to lose the sign of the scale.
This question has been here for a while. But as I was searching it's still relevant.
I found the "Self Object" node combined with "Object Info" can give the location of the base object.
Not sure if this will set the position, but for my case that was not required.
I used the node Transform Geometry to do the trick. By scaling it down to zeros for all coordinates and it will shrink to the origin of the geometry.
The best is you still have the original amount of position vector array to match the geometry calculations rather than only one "dot diamond" point left.
Surely, you need to "spare" another geometry to do the scale down for the "acquisition of the location only" trick.
I used the Bounding Box Node and took the Min Vector as my object position. You could also use Math nodes to calculate the center of the object using the Min and Max vectors from the Bounding Box node.
