shoot the player effect

Questions & Answers
1

hey guys i am using fps tutorial to improve my skills in unity but i need to do something when the enemy shoot the player the screen becomes slightly red i thought that i need a script to show image when the player is attacked

2

Although I've never tried it myself, I think you'd use a full-screen GUI Texture for this. You could set the alpha relative to the current player health (i.e. as the player approached death, the texture would become almost totally opaque). You'd never want the view completely obscured, so you'd probably need a formula something like this:

alpha = (1 - (health/100)) * 0.9;

// at 100% health, alpha would be 0
// at 50% health, alpha would be 0.45
// at 1% health, alpha would be 0.891
// at 0% health, alpha would be 0.9
3

Marowi's idea would work here is how to do it...

first get a texture for the red like this:

http://img685.imageshack.us/i/hurt.png/

then in unity create a guiTexture GameObject/Create Other/GUITexture and change the texture to be the texture on the link... play around with the color and get it to look right...

then create a JavaScript script and name it "FullScreenGUI" and then copy and past this code in :

function Update () {
    transform.position.x = 0;
    transform.position.y = 0;

    guiTexture.pixelInset.x = 0;
    guiTexture.pixelInset.x = 0;

    guiTexture.pixelInset.width = Screen.width;
    guiTexture.pixelInset.height = Screen.height;
}

add this script to the guiTexture then in the FPSPlayer script paste this edited version 

    var maximumHitPoints = 100.0;
var hitPoints = 100.0;
var hurtTexture : GUITexture;

var bulletGUI : GUIText;
var rocketGUI : DrawRockets;
var healthGUI : GUITexture;

var walkSounds : AudioClip[];
var painLittle : AudioClip;
var painBig : AudioClip;
var die : AudioClip;
var audioStepLength = 0.3;

private var machineGun : MachineGun;
private var rocketLauncher : RocketLauncher;
private var healthGUIWidth = 0.0;
private var gotHitTimer = -1.0;

var rocketTextures : Texture[];

function Update () {
    hurtTexture.color.a = (1 - (hitPoints/maximumHitPoints));
}

function Awake () {
    machineGun = GetComponentInChildren(MachineGun);
    rocketLauncher = GetComponentInChildren(RocketLauncher);

    PlayStepSounds();

    healthGUIWidth = healthGUI.pixelInset.width;
}

function ApplyDamage (damage : float) {
    if (hitPoints < 0.0)
        return;

    // Apply damage
    hitPoints -= damage;

    // Play pain sound when getting hit - but don't play so often
    if (Time.time > gotHitTimer && painBig && painLittle) {
        // Play a big pain sound
        if (hitPoints < maximumHitPoints * 0.2 || damage > 20) {
            audio.PlayOneShot(painBig, 1.0 / audio.volume);
            gotHitTimer = Time.time + Random.Range(painBig.length * 2, painBig.length * 3);
        } else {
            // Play a small pain sound
            audio.PlayOneShot(painLittle, 1.0 / audio.volume);
            gotHitTimer = Time.time + Random.Range(painLittle.length * 2, painLittle.length * 3);
        }
    }

    // Are we dead?
    if (hitPoints < 0.0)
        Die();
}

function Die () {
    if (die)
        AudioSource.PlayClipAtPoint(die, transform.position);

    // Disable all script behaviours (Essentially deactivating player control)
    var coms : Component[] = GetComponentsInChildren(MonoBehaviour);
    for (var b in coms) {
        var p : MonoBehaviour = b as MonoBehaviour;
        if (p)
            p.enabled = false;
    }

    LevelLoadFade.FadeAndLoadLevel(Application.loadedLevel, Color.white, 2.0);
}

function LateUpdate () {
    // Update gui every frame
    // We do this in late update to make sure machine guns etc. were already executed
    UpdateGUI();
}

function PlayStepSounds () {
    var controller : CharacterController = GetComponent(CharacterController);

    while (true) {
        if (controller.isGrounded && controller.velocity.magnitude > 0.3) {
            audio.clip = walkSounds[Random.Range(0, walkSounds.length)];
            audio.Play();
            yield WaitForSeconds(audioStepLength);
        } else {
            yield;
        }
    }
}

function UpdateGUI () {
    // Update health gui
    // The health gui is rendered using a overlay texture which is scaled down based on health
    // - Calculate fraction of how much health we have left (0...1)
    var healthFraction = Mathf.Clamp01(hitPoints / maximumHitPoints);

    // - Adjust maximum pixel inset based on it
    healthGUI.pixelInset.xMax = healthGUI.pixelInset.xMin + healthGUIWidth * healthFraction;

    // Update machine gun gui
    // Machine gun gui is simply drawn with a bullet counter text
    if (machineGun) {
        bulletGUI.text = machineGun.GetBulletsLeft().ToString();
    }

    // Update rocket gui
    // This is changed from the tutorial PDF. You need to assign the 20 Rocket textures found in the GUI/Rockets folder
    // to the RocketTextures property.
    if (rocketLauncher) {
        rocketGUI.UpdateRockets(rocketLauncher.ammoCount);
        /*if (rocketTextures.Length == 0) {
            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.");
        } else {
            rocketGUI.texture = rocketTextures[rocketLauncher.ammoCount];
        }*/
    }
}

and then drag the guiTexture onto the empty hurtTexture slot.

hopefully this helps :)

good luck!