Three.js add an object to a group but keep global position/rotation/scale as it was

Question

I want to move an object from one group (or world/scene) to another group, but keep it\'s global transformation intact. Basically, I don\'t want to see the object change.

Answer 1

EDIT: You can use the built-in method Object3D.attach():

// add object as a child of parent, while maintaining the object's world transform

parent.attach( object );

three.js r.109