GUI element position to world coordinates

[system]

Hi everyone,

I just started playing around with the new GUI features in 4.6 beta and i am having a hard time right now trying to figure out how to check if the user touches a GUI element (in my case an image).

I have an InputManager class that some GameObject use to check if a certain action is triggered. Inside the InputManager class i determine whether it’s a mobile device and and check for touches instead of keys if it is.

The class structure looks like this:

public class InputManager : MonoBehaviour {
	public Image jumpImage;
	private bool isTouchEnabled = false;

	void Start () {

		isTouchEnabled = Application.platform == RuntimePlatform.Android || Application.platform == RuntimePlatform.IPhonePlayer;

		if (!isTouchEnabled)
			jumpImage.enabled = false;
	}


	public bool GetJumpButtonDown() {

		if (isTouchEnabled) {

			if (Input.touchCount < 1)
				return false;

			foreach (Touch touch in Input.touches) {
				if (touch.phase == TouchPhase.Began &&  /* touch position is inside jumpImage rect */)
					return true;
			}
		} else
			return Input.GetButtonDown("Jump");

		return false;
	}
}

I tried several things like

jumpImage.rectTransform.rect.Contains(Camera.main.ScreenToWorldPoint(touch.position))

but they all failed, because they don’t seem to return the world coordinates (or screen coordinates) of the image.

When it comes to Unity, i am pretty much a noob and any tip or advice would be appreciated. Thanks!

[troien]

The RectTransformUtility class contains some methods that you can use for this purpose.

And although the docs are not complete yet. They might help you further.