CODEWITHSUNDEEP
unity-game-enginepositiontransform
moosefetcher
moosefetcher

Reputation: 1901

Setting position of child transform, relative to parent in Unity

I have set the parent of a HUD camera's transform to the transform of the object it's 'orbiting'. The trouble is, when I then set the position of the child transform, it is still being moved to 'global' coordinates.

I have tested this in the Unity editor, paused the game, and the HUD camera is, indeed, a child of the parent object (it is listed under that object's hierarchy).

The Unity tutorial here...
https://unity3d.com/learn/tutorials/topics/interface-essentials/hierarchy-and-parent-child-relationships
...seems pretty clear that, once an object is made a child of another, its position is relative to the parent object (from about 45 seconds into the video). But is there a difference between doing this programmatically and manually in the Unity editor?

Here's my relevant code:

 hudCamera.transform.parent = hudSelectedObject.transform;
 hudCamera.transform.position = new Vector3(0, 0, -50); // this still moves the HUD camera to global position 0, 0, -50 - why?

The parent object is not positioned at 0, 0, 0, so it's not just that the child object position is set relative to 0, 0, 0.

So how do I programmatically set the position of the HUD camera so it is relative to the parent transform position, if not by just setting it as a child of the parent object and then setting its position? Thanks.

Upvotes: 1

Views: 12810

Answers (2)

Zohaib Javed
Zohaib Javed

Reputation: 343

Whenever you instantiate UI Item programmatically. Whenever I add any UI item through code. I use following code (updated it for your use) 

hudCamera.transform.SetParent(hudSelectedObject.transform);

hudCamera.transform.localScale = Vector3.one;       
hudCamera.GetComponent<RectTransform>().sizeDelta = Vector2.zero;

Upvotes: 0

Umair M
Umair M

Reputation: 10750

Instead of hudCamera.transform.parent = hudSelectedObject.transform;

Use this : 

hudCamera.transform.SetParent(hudSelectedObject.transform);
hudCamera.transform.localScale = Vector3.one;
hudCamera.transform.localPosition= Vector3.zero; // Or desired position

Upvotes: 3

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