Instantiate object based on local position of another object without parenting?

Unity Engine
1

I’m trying to Instantiate an object based on the local position rotation of another object without parenting.

I made a crappy diagram to show what I mean.

1470583--80820--$position.jpg

Can anyone help please?

Thanks

2

Yeah? You get the first object’s position and orientation, and you instantiate a new object based on that.

There’s even a method that let you pass a position/orientation at the moment of instantiation;

So, what have you tried? Where are you blocked?

3

It’s not the instantiating part that I’m having issues with, it’s the positioning, I’ve tried…

	public GameObject targetObject;

	public Vector3 offset;

	
	void Start () {
		transform.rotation = targetObject.transform.rotation;
		transform.position = targetObject.transform.localPosition + offset;
	}

and a bunch of different combinations of the above.

4

Why localPosition and not position? Is the target parented to something? Should the offset be dependent of the target’s orientation?

5

I’ve tried position too, I’ve tried positioning at the target object position, then rotation to match the target objects rotation then offsetting but it ends up moving in world space.

6

Should I just instantiate objects, parent them to the target object, position them relative to the target then unparent them?

Sounds a bit dodgy.

7

You can convert a position relative to a transform into world space using transform.TransformPoint.

8

Thanks, that did the trick:

	public GameObject targetObject;

	public Vector3 offset;
	
	void Start () {

		transform.rotation = targetObject.transform.rotation;
		transform.position = targetObject.transform.position;
		transform.position += transform.TransformPoint(offset);

	}