Flashing Image / Texture

Hey all,

I'm trying to flash a simple PNG with an alpha on and off a few times once an event occurs, but I don't quite understand the logic.

Would I need to black out the entire alpha every lets say 1 second?

And since I'm basing this off of time, what function should I use?

Thanks

 

Anytime you want to do something with timing like this, coroutines are your best friend. You can do something like this with the code:

Code (csharp):

1.  
2. IEnumerator Flash(int flashCount)
3. {
4.     for(int i=0; i < flashCount; i++)
5.     {
6.         renderer.material.color = Color.white;
7.         yield return new WaitForSeconds(1);
8.         renderer.material.color = Color.clear;
9.         yield return new WaitForSeconds(1);
10.     }
11. }

And then you simply fire this off in your code by calling

Code (csharp):

1. StartCoroutine(Flash(YOURNUMBER));

 

Code (csharp):

1. if(p1shots == 0)
2. {
3. GUI.Label(new Rect(halfWidth - 184, halfHeight - 27, reloadImg.width, reloadImg.height), reloadImg);
4. }

At the moment I'm simply creating a Label on the fly.
So.. with a coroutine, I would need to create, then destroy the object every 1 second? Or can I easily manipulate the transparency.

 

Code (CSharp):

1. Color setAlpha = new Color(1f, 0f, 0f, 0f);
2.  
3. private void Update()
4.     {
5.         StartCoroutine(BloodSplatter());
6.     }
7.  
8. private IEnumerator BloodSplatter()
9.     {
10.         if (damaged)
11.         {
12.             setAlpha.a = 0.2f;
13.             damageImage.color = setAlpha;
14.            
15.             yield return new WaitForSeconds(0.1f);
16.             damaged = false;
17.         }
18.         else
19.         {
20.             setAlpha.a = 0f;
21.             damageImage.color = setAlpha;
22.         }
23.     }

This should work perfectly fine.... If any more questions, post them here