Having trouble. Trying to fade out a sprite after 5 seconds over the course of a second or two.

Questions & Answers
1

After five seconds the sprite just disappears instantly. I got it from the manual specifically because it said it wouldn’t do that.

The only changes made to the script was that I added the 5 second wait “startFade” (it was still disappearing immediately before I added that) and I had to change “renderer” to “GetComponent()”

using UnityEngine;
    using System.Collections;
    
    public class FadeSprite : MonoBehaviour 
    {
    	public float fadeWait = 5;
    
    	void Start () 
    	{
    		StartCoroutine (startFade (fadeWait));
    	}
    
    	IEnumerator Fade() 
    	{
    		for (float f = 1f; f >= 0; f -= 0.1f) 
    		{
    			Color c = GetComponent<Renderer>().material.color;
    			c.a = f;
    			GetComponent<Renderer>().material.color = c;
    			yield return null;
    		}
    	}
    
    	IEnumerator startFade(float wait)
    	{
    		yield return new WaitForSeconds(wait);
    		StartCoroutine ("Fade");
    	}
    }

Sorry I’m not sure if the code tags worked. I read this http://forum.unity3d.com/threads/using-code-tags-properly.143875/ and tried doing what it said but I’m not sure.

2

It looks like the Fade() function is leaving the material.color at 0 when the FOR loop ends. If you want the sprite to re-appear then capture the color before the FOR loop and restore it at the end.

3

Your color is faing way to quickly. Beside you should use Time.deltaTime to ensure it wouldn’t be frame rate dependant like this:

     IEnumerator Fade() 
         {
             for (float f = 1f; f >= 0; f -= Time.deltaTime) 
             {
                 Color c = GetComponent<Renderer>().material.color;
                 c.a = f;
                 GetComponent<Renderer>().material.color = c;
                 yield return null;
             }
         }

This would last 1s. If you want it to last more just divide Time.deltaTime by some number.