character fading on hit?

this is something im looking to do rather than a healthier, which i have.

so instead of the character just dying when the health bar reaches a point, he fades out. now i have something for the health bar, works perfectly, by all means use it.
but how can i use this to affect the players alpha?

here is what i have just now. i have tried playing with it, but i run into errors. have not seen anybody else ask this. so thought i may as well be the first

Code (CSharp):

1. public float health = 100f;
2.     public float healthTimer;
3.  
4.     private SpriteRenderer healthBar;
5.     private Vector3 healthScale;
6.  
7.     void Start () {
8.         healthBar = GameObject.Find ("HealthBar").GetComponent<SpriteRenderer> ();
9.         healthScale = healthBar.transform.localScale;
10.     }
11.  
12.     void FixedUpdate () {
13.         if(health <= 0){
14.             Destroy(this.gameObject);
15.         }
16.         if(health > 100){
17.             health = 100;
18.         }
19.         HealthUpdate();
20.     }
21.  
22.     void HealthUpdate(){
23.         healthBar.transform.localScale = new Vector3(healthScale.x * health * 0.01f, 1, 1);
24.     }
25.  
26.     void OnCollisionEnter2D(Collision2D enemyHit){
27.         if (enemyHit.gameObject.tag == "Enemy"){
28.             health -= 3;
29.         }
30.  
31.         if(enemyHit.gameObject.tag == "HealthPickUp"){
32.             health += 10;
33.         }
34.     }

 

Grab the Renderer component and change the alpha value on the material being used. Make sure you're using a transparent shader for the object.

Something like this should set it to half transparency:

Code (csharp):

1.  
2. Renderer renderer = gameObject.GetComponent<Renderer>();
3. renderer.material.color.a = 0.5f;
4.  

 

ill give that a shot thanks. was trying until 2am, but thought that i should really get some sleep