Adding red haze around camera when health is low

So, I have tried all day, but couldnt get this to work.
So what I want to do is, when the player has only 40 hitpoints left (which would deem them severely hurt) I want a GUI image to be shown. but if the player gets a healthpack, I want the image to be hidden. I have edited a script from the FPS tutorial to do this, but it DOES NOT WOOORK!the parts that I edited have HERE written next to them.

Code (csharp):

1. var maximumHitPoints = 100.0;
2. var hitPoints = 100.0;
3.  
4. var bulletGUI : GUIText;
5. var rocketGUI : DrawRockets;
6. var healthGUI : GUITexture;
7.  
8. var walkSounds : AudioClip[];
9. var painLittle : AudioClip;
10. var painBig : AudioClip;
11. var die : AudioClip;
12. var audioStepLength = 0.3;
13.  
14. private var machineGun : MachineGun;
15. private var rocketLauncher : RocketLauncher;
16. private var healthGUIWidth = 0.0;
17. private var gotHitTimer = -1.0;
18.  
19. var rocketTextures : Texture[];
20. var iconTexture : Texture[]; HERE
21.  
22. function Awake () {
23.     machineGun = GetComponentInChildren(MachineGun);
24.     rocketLauncher = GetComponentInChildren(RocketLauncher);
25.    
26.     PlayStepSounds();
27.  
28.     healthGUIWidth = healthGUI.pixelInset.width;
29. }
30.  
31. function Start () {
32.    iconTexture.enabled = false;
33. }
34.  
35. function ApplyDamage (damage : float) {
36.     if (hitPoints < 0.0)
37.         return;
38.  
39.     // Apply damage
40.     hitPoints -= damage;
41.  
42.     // Play pain sound when getting hit - but don't play so often
43.     if (Time.time > gotHitTimer  painBig  painLittle) {
44.         // Play a big pain sound
45.         if (hitPoints < maximumHitPoints * 0.2 || damage > 20) {
46.             audio.PlayOneShot(painBig, 1.0 / audio.volume);
47.             gotHitTimer = Time.time + Random.Range(painBig.length * 2, painBig.length * 3);
48.         } else {
49.             // Play a small pain sound
50.             audio.PlayOneShot(painLittle, 1.0 / audio.volume);
51.             gotHitTimer = Time.time + Random.Range(painLittle.length * 2, painLittle.length * 3);
52.         }
53.     }
54.     if (hitPoints < 40.0) HERE
55.       iconTexture.enabled = true; HERE
56.     }
57.     // Are we dead?
58.     if (hitPoints < 0.0) {
59.         Die();
60.     }
61.  
62. function Die () {
63.     if (die)
64.         AudioSource.PlayClipAtPoint(die, transform.position);
65.    
66.     // Disable all script behaviours (Essentially deactivating player control)
67.     var coms : Component[] = GetComponentsInChildren(MonoBehaviour);
68.     for (var b in coms) {
69.         var p : MonoBehaviour = b as MonoBehaviour;
70.         if (p)
71.             p.enabled = false;
72.     }
73.  
74.     LevelLoadFade.FadeAndLoadLevel(Application.loadedLevel, Color.black, 2.0);
75. }
76.  
77. function LateUpdate () {
78.     // Update gui every frame
79.     // We do this in late update to make sure machine guns etc. were already executed
80.     UpdateGUI();
81. }
82.  
83. function PlayStepSounds () {
84.     var controller : CharacterController = GetComponent(CharacterController);
85.  
86.     while (true) {
87.         if (controller.isGrounded  controller.velocity.magnitude > 0.3) {
88.             audio.clip = walkSounds[Random.Range(0, walkSounds.length)];
89.             audio.Play();
90.             yield WaitForSeconds(audioStepLength);
91.         } else {
92.             yield;
93.         }
94.     }
95. }
96.  
97.  
98. function UpdateGUI () {
99.     // Update health gui
100.     // The health gui is rendered using a overlay texture which is scaled down based on health
101.     // - Calculate fraction of how much health we have left (0...1)
102.     var healthFraction = Mathf.Clamp01(hitPoints / maximumHitPoints);
103.  
104.     // - Adjust maximum pixel inset based on it
105.     healthGUI.pixelInset.xMax = healthGUI.pixelInset.xMin + healthGUIWidth * healthFraction;
106.  
107.     // Update machine gun gui
108.     // Machine gun gui is simply drawn with a bullet counter text
109.     if (machineGun) {
110.         bulletGUI.text = machineGun.GetBulletsLeft().ToString();
111.     }
112.    
113.     // Update rocket gui
114.     // This is changed from the tutorial PDF. You need to assign the 20 Rocket textures found in the GUI/Rockets folder
115.     // to the RocketTextures property.
116.     if (rocketLauncher) {
117.         rocketGUI.UpdateRockets(rocketLauncher.ammoCount);
118.         /*if (rocketTextures.Length == 0) {
119.             Debug.LogError ("The tutorial was changed with Unity 2.0 - You need to assign the 20 Rocket textures found in the GUI/Rockets folder to the RocketTextures property.");
120.         } else {
121.             rocketGUI.texture = rocketTextures[rocketLauncher.ammoCount];
122.         }*/
123.     }
124. }

OR, if anyone else has already prepared a script similar to this, please send it to me.

 

You have iconTexture defined as an array of textures, but you're trying to access it as if it was just one texture.

--Eric

 

Thanks for the quick reply!
so how about this?:

Code (csharp):

1. var iconTexture : GUITexture;

and

Code (csharp):

1.     if (hitPoints < 40.0)
2.       iconTexture.enabled = true;
3.     }

 

Its working now! thank you.
But one problem - My character cannot die...his health gets to 0 and stops.

 

That's because you say "if (hitPoints < 0.0) return", so none of the other code will ever run if the hitPoints are below 0.

--Eric