How to attach an object to a parent and keep their original position?

[Gar080308]

Say I have A object at (1,0,1)

And I have B object at (2,0,2)

I want to add B as child of A but keep its world position as (2,0,2) instead of some weird position.

Tried to set wolrdTransform.position with (2,0,2) but it says wolrdTransform.position is read only.

Can someone help please?

Thanks in advance!

[jnsmalm]

Try this:

// First, get the world position of the model
    const worldPosition = model2.worldTransform.position;

    // Calculate the local position of the world position in the first model
    const localPosition = PIXI3D.Point3D.transform(
      worldPosition,
      model.transform.inverseWorldTransform
    );
    model.addChild(model2);

    // Set the new local position of the model
    model2.position = localPosition;