Undo.RecordObject doesn't work

Questions & Answers
1

Hello,

I want to implent an undo/redo-system in a 3D virtual reality editor.
I already used Undo.RegisterCreatedObjectUndo to register when a new object is created and make the action undoable.
However I can not get the essential Undo.RecordObject to work, here is an example:

 Undo.RecordObject(GetComponent<LaserPointer>().hitObject, "ObjectMoved");
 OnTriggerDownMove(GetComponent<LaserPointer>().hitObject);

In this example I simply target an GameObject with the laserpointer (attached to the controller) and move it by holding the trigger and dragging it.
Undo.RecordObject does not register any undo-operation for that.

If I use the Undo.RegisterCompleteObjectUndo function, I can use Undo.performUndo to reset the position, however it only allows to save 1 copy of the object and multiple move-steps will not be undoable step-wise.

I hope you guys can help me out, if you need additional information just tell me.

2

It sounds like you are changing properties on the Transform component, but recording the state of the LaserPointer component. Make sure you pass the affected Transform component to the Undo.RecordObject() method.

3

I managed to partly get the Undo.RecordObject() function to work now. I placed it inside the OnTriggerDownMove() function and used the transform of the given GameObject:

public void OnTriggerDownMove(GameObject hitObject)
    {
            Undo.RecordObject(hitObject.transform, "ObejctMoved");
           /*...rest of the function...*/
}

However it has the following problem: When I move the object from a to b and then use performUndo(), the object will be reset too position a and everything seems fine.
But when I move the object from a to b and then I move the object from b to c (the object can be grabbed and moved multiple times) and then I use performUndo(), the object will always be reset to position a, even if the starting-position of the last move was somewhere else.
Any ideas?