keeping the xp after death

Questions & Answers
1

im using the fps player script from the fps tutorial that i added a level systeme... but the thing is when i die i lose all exp,added Hp and level. how can i keep my exp hp and level from restarting????

here is my script:

var maximumHitPoints = 100.0;
var hitPoints = 100.0;

var bulletGUI : GUIText;

var healthGUI : GUITexture;

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

var guiTextHealth : GUIText;
var guiTextEXP : GUIText;
var accumulatedExperiencePoints : int = 0;
var levelExpRequirements : int = 250;
var currentLevel : int = 1;
var levelUp = false ;

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

var rocketTextures : Texture[];

function Update () {
    if(accumulatedExperiencePoints >= levelExpRequirements) {

        accumulatedExperiencePoints -= levelExpRequirements;
        currentLevel += 1;
        levelUp = true;
        }

    if  (levelUp){  
    levelExpRequirements *= 1.2;

    maximumHitPoints +=250;
    hitPoints = maximumHitPoints;
    gameObject.Find("MachineGun").GetComponent(MachineGun).damage += 10;
    levelUp = false;
    }

    guiTextEXP.text = accumulatedExperiencePoints+"/" + levelExpRequirements + "|" + currentLevel;
    guiTextHealth.text = 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.red, 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();
    }

}
3

Look into the DontDestroyOnLoad function: http://unity3d.com/support/documentation/ScriptReference/Object.DontDestroyOnLoad.html

Or save and retrieve relevant stats to PlayerPrefs: http://unity3d.com/support/documentation/ScriptReference/PlayerPrefs.html

2

You can make guiTextEXP a static var and it should be preserved across scene loads.