logic help

Hi, I've knackered my brains... need a tuna sandwich, anyhew, see the code below, It simple fades the alpha of a quad on update for a set time then repeats, it's a pulse fade effect from zero to one, but what should I create to make it pulse the other direction from 1 to zero in the update, I like the pulse effect but a more subtle effect is needed

Code (csharp):

1.         public GameObject Background;
2.         private Material Background_Mat;
3.         private float timer = 2.0f;
4.    
5.         void Start ()
6.         {
7.                 if (Background != null && Background.renderer != null) {
8.                         Background_Mat = Background.renderer.material;
9.                 }
10.         }
11.  
12.         void Update ()
13.         {
14.                 timer -= Time.deltaTime;
15.                 Color QuadAlpha = Background_Mat.color;
16.                 QuadAlpha.a = (1.0f / timer);
17.                 if (timer < 0.1f) {
18.                         QuadAlpha.a = 1.0f;
19.                         timer = 2.0f;
20.                 }
21.  
22.                 Background_Mat.color = QuadAlpha;
23.         }

 

Have you tried just using QuadAlpha.a = Mathf.PingPong(Time.time, 1.0f)

 

That was just the ticket, thank you for letting me of of this, cheers to you.

 

here's the simple script, just drag and drop a game object on there and your golden.

Code (csharp):

1.  
2. using UnityEngine;
3. using System.Collections;
4.  
5. public class BackgroundPulse : MonoBehaviour
6. {
7.  
8.         public GameObject Background;
9.         private Material Background_Mat;
10.    
11.         void Start ()
12.         {
13.                 if (Background != null && Background.renderer != null) {
14.                         Background_Mat = Background.renderer.material;
15.                 }
16.         }
17.  
18.         void Update ()
19.         {
20.                 Color QuadAlpha = Background_Mat.color;
21.                 QuadAlpha.a = Mathf.PingPong (Time.time, 1.0f);
22.                 Background_Mat.color = QuadAlpha;
23.         }
24. }