Coroutine Issue

Hey,

I'm having a small issue with my game, All I need to do is set the alpha of my sprite to 255, then lerp it to 0, I've programmed the logic but it doesn't seem to work The coroutine works on it's own, but when I set it to 255 first it doesn't work. So I tried to nest the coroutine within a coroutine but still doesn't work.

If anyone has any idea and is willing to help out I'd appreciate it loads!

Code (CSharp):

1. IEnumerator ShieldFade() {
2.         Color newColor = animationSettings.shieldRenderer.material.color;
3.         newColor.a = 255f;
4.         animationSettings.shieldRenderer.material.color = newColor;
5.        
6.         yield return StartCoroutine(FadeTo(0, 0.1f, animationSettings.shieldRenderer));
7.     }

then the fade coroutine :

Code (CSharp):

1. IEnumerator FadeTo(float aValue, float aTime, SpriteRenderer renderer) {
2.         float alpha = renderer.material.color.a;
3.         for (float t = 0.0f; t < 1.0f; t += Time.deltaTime / aTime) {
4.             Color newColor = new Color(1, 1, 1, Mathf.Lerp(alpha, aValue, t));
5.             renderer.material.color = newColor;
6.             yield return null;
7.         }
8.     }

 

You're making things a bit complicated. All you need is to use Color.Lerp, starting from Color.clear to Color.white. Also keep in mind that Lerp needs to be called every frame (so either in Update or a while(){ ... yield} coroutine).

 

Color values range from 0 to 1; you wouldn't use 255 for anything.

--Eric

 

Ahh thanks Eric, Forgot about that completely! Just got confused since in the editor window it's displayed from 0 - 255. Thanks again tho.

You're completely correct, Color.lerp would've worked fine. They both do the same thing.

Is there any difference performance wise?

 

Color32 ranges from 0-255 for each channel. I don't think there is a major performance difference but unless you're running this script on hundreds of objects simultaneously it really shouldn't matter at all. Did you get it to work calling it once every frame during the transition?