Trouble moving a Sprite to where the user clicked.

[ScottV42]

I have an existing menu that I want to move where the user clicked.
I have search the forums, and found some articles, but I can't seem to make any sense out of them.

Here is the code that is triggered when the user clicks. The TerrainConditionDropDown is a GameObject with the UISprite script.

public GameObject TerrainConditionDropDown;
Vector3 worldClickPos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
TerrainConditionDropDown.transform.localPosition = TerrainConditionDropDown.transform.parent.InverseTransformPoint(worldClickPos);

By manually moving the TerrainConditionDropDown to a desired spot, the transform displayed in the inspector is (184,357,-4). When I click on the same desired spot, the above code is triggered, and the transform becomes (-4684, 674, -10799).

Multiple forum posts lead to this code fixing the problem, but I don't know what type of object widget represents.
widget.transform.localPosition = widget.transform.parent.InverseTransformPoint(worldPos);

Thanks

[ArenMook]

'widget' is your UIWidget. Whatever you're trying to position in your UI hierarchy. This would be your menu object if you have that instead, assuming your menu is a part of your hierarchy like so:

UIRoot
- UI Camera
- Menu <- this one
-- Widget 1
-- Widget 2
-- Widget 3

[ScottV42]

Thank you for that clarification. 

In the code below, the TerrainConditionDropDown is set to a UIWidget that is a direct child of UIRoot. As far as I can tell, this matches your example.

1. public GameObject TerrainConditionDropDown;
2. Vector3 worldClickPos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
3. TerrainConditionDropDown.transform.localPosition = TerrainConditionDropDown.transform.parent.InverseTransformPoint(worldClickPos);

The InverseTransformPoint is returning a position very far away from the desired point, and I don't understand why. The desired position is (184,357,-4) and the position returned by InverseTransformPoint is (-4684, 674, -10799).

[ArenMook]

Vector3 worldClickPos = Camera.main.ScreenToWorldPoint(Input.mousePosition);

Is there depth involved? (is your Camera.main 3D?) Because mouse position only has 2D coordinates, and you'd need the actual 3D point, so a Raycast would be required.

If you are doing it from any NGUI event, such as OnClick, try this instead:

1. Vector3 worldClickPos = UICamera.lastHit.point;
2. TerrainConditionDropDown.transform.localPosition = TerrainConditionDropDown.transform.parent.InverseTransformPoint(worldClickPos);

[ScottV42]

Both the main camera, and the UICamera under UIRoot have their projection field set to Orthographic, which I expect means both cameras are 2D.

If it helps, both camera started off as 3D cameras, and then were set to 2D.

Thanks,
Scott

[ArenMook]

Well, did you try my last suggestion?