making a fadeout with the new GUI in 4.6?

Questions & Answers
1

I figured that making a fadeout transition with the new GUI system would be easy, my plan was: create a black panel (Image component) that fills the whole screen, control the alpha with a Mathf.Lerp and there! fadeout accomplished!.. the problem is, I have no idea how to access the alpha of the Image Component… is there a way to do that? or maybe an even easier way to do fadeouts/fadeins with this new Gui system? thanks in advance!

4

Use a CanvasGroup component on the parent panel (not the Image), and fade the Alpha of that.

using UnityEngine;
using System.Collections;

public class GUIFadeScript : MonoBehaviour {

	public CanvasGroup fadeCanvasGroup;

	public IEnumerator FadeToBlack(float speed)
	{
		while (fadeCanvasGroup.alpha < 1f)
		{
			fadeCanvasGroup.alpha += speed * Time.deltaTime;

			yield return null;
		}
	}

}
2

You should use the gui element’s color field.
color.a represents the alpha value, so that’s what you should change.

3

Thanks a lot! but when using this code:

myImage.color = new Color(0.0f, 0.0f, 0.0f, Mathf.Lerp(myImage.color.a, 0.0f, 255f * Time.deltaTime));

I’m getting this error: “Object Reference not set to an instance of an object” what’s up with that? :frowning: