Unity:Animation:Fade out alpha

FadeOut.cs

using UnityEngine;
using System.Collections;

/// <summary>
/// Creates a fadeout animation modifying the alpha component of the first material color.
/// The material must be transparent  
/// </summary>
public class FadeOut : MonoBehaviour {

	/// <summary>
	/// Seconds until completely transparent
	/// </summary>
	public float animationTime = 1.0f;

	private bool accept = false;
	private Material mat;
	private float startTime;
	private Color startColor;

	/// <summary>
	/// Initialization when enabled
	/// </summary>
	void OnEnable () {
		Debug.Log("OnEnable");
		mat = gameObject.renderer.material;
		if (mat!=null) {
			accept = true;
			startTime = Time.time;
			startColor = mat.color;
			Debug.Log("accepted");
		}
		else {
			Debug.Log("No renderere!!!");
		}
	}
	
	// Update is called once per frame
	void FixedUpdate () {
		if (accept) {
			float timeCovered = (Time.time - startTime);
			float fracTime = timeCovered / animationTime;
			Color c = startColor;
			c.a = Mathf.Lerp(startColor.a, 0.0f, fracTime);
			Debug.Log (c);
			mat.color = c;
		}
	}
}