Healthy Floating Numbers

Questions & Answers
1

I have this code attached to some enemy characters in my scene. I was wondering if there was a way to have a health bar or health number just floating above the enemy characters?

var hitPoints = 100.0;

var deadReplacement : Transform;

var dieSound : AudioClip;

function ApplyDamage (damage : float) {
	// We already have less than 0 hitpoints, maybe we got killed already?
	if (hitPoints <= 0.0)
		return;

	hitPoints -= damage;
	if (hitPoints <= 0.0)
	{
		Detonate();
	}
}


function Detonate () {
	// Destroy ourselves
	Destroy(gameObject);
	
	// Play a dying audio clip
	if (dieSound)
		AudioSource.PlayClipAtPoint(dieSound, transform.position);

	// Replace ourselves with the dead body
	if (deadReplacement) {
		var dead : Transform = Instantiate(deadReplacement, transform.position, transform.rotation);
		
		// Copy position & rotation from the old hierarchy into the dead replacement
		CopyTransformsRecurse(transform, dead);
	}
}

static function CopyTransformsRecurse (src : Transform,  dst : Transform) {
	dst.position = src.position;
	dst.rotation = src.rotation;
	
	for (var child : Transform in dst) {
		// Match the transform with the same name
		var curSrc = src.Find(child.name);
		if (curSrc)
			CopyTransformsRecurse(curSrc, child);
	}
}
2

First I thought you were asking for variables of type float good for your health ^^

Anyway, Health bar is done can be displaying a white texture with a tint on Gui, rect.width being that health. Displaying health over a character’s head, look Camera.ScreenPointToRay.

3

Attach this script to your enemy.

EnemyHealth.js:

/* Attach to the enemy */

 //the amount of health the enemy has
var hP : float = 100;     

//the amount of health the enemy should not have more of
var maxHP : float = 100;      

//the width your bar is
var healthBarWidth : int;  
    
//the texture you wish to have on 
var EnemyHealthTexture : Texture;      

//allows the bar to be seen when set to true
var HealthEnabled : boolean;

function Start () {

   //whatever length you want your bar to start at
   healthBarWidth = 131;

   //by default we can't see the health bar
   HealthEnabled = false;
      
}

function Update () {

   //the percent will update the length of the bar
   var healthpercent : float = hP / maxHP;
   
   if (healthpercent < 0) { healthpercent = 0; }
   if (healthpercent > 100) { healthpercent = 100; }

   //makes sure the bar is the correct ratio
   healthBarWidth = healthpercent * 131;

   
}

function OnGUI () {

//if Activated show the health Bar
if (HealthEnabled == true) {

   //Draw the health bar, set it to whatever position and size
   GUI.DrawTexture( Rect(60, 50, healthBarWidth, 17), EnemyHealthTexture);
   
}
   
}

//when you target the enemy you also SendMessage("Activate");
function Activate () {

  //allows the GUI to be Shown
   HealthEnabled = true;

}
4

Thanks! I combined Your Script with mine to get something that works. I still have one problem though. I have multiple enemies. If I partially kill one then start killing another one, the health seems to jump up to 100% again. Is there a way to have separate health bars appear for different enemies? I have attached the script that I used:

var hitPoints : float = 100.0;
var deadReplacement : Transform;
var dieSound : AudioClip;
var healthBarWidth : int;
var EnemyHealthTexture : Texture;
var HealthEnabled : boolean;
var maxHP : float = 100;   

function Start () {

   //whatever length you want your bar to start at
   healthBarWidth = 131;

   //by default we can't see the health bar
   HealthEnabled = false;

}

function Update () {

   //the percent will update the length of the bar
   var healthpercent : float = hitPoints / maxHP;

   if (healthpercent < 0) { healthpercent = 0; }
   if (healthpercent > 100) { healthpercent = 100; }

   //makes sure the bar is the correct ratio
   healthBarWidth = healthpercent * 131;
}

function OnGUI () {

   //if Activated show the health Bar
   if (HealthEnabled == true) {

      //Draw the health bar, set it to whatever position and size
      GUI.DrawTexture( Rect(60, 50, healthBarWidth, 17), EnemyHealthTexture);

   }

}

function ApplyDamage (damage : float) {
    // We already have less than 0 hitpoints, maybe we got killed already?
    if (hitPoints <= 0.0)
        return;

    hitPoints -= damage;
    if (hitPoints <= 0.0)
    {
        Detonate();
    }
  //allows the GUI to be Shown
   HealthEnabled = true;

}

function Detonate () {
    // Destroy ourselves
    Destroy(gameObject);

    // Play a dying audio clip
    if (dieSound)
        AudioSource.PlayClipAtPoint(dieSound, transform.position);

    // Replace ourselves with the dead body
    if (deadReplacement) {
        var dead : Transform = Instantiate(deadReplacement, transform.position, transform.rotation);

        // Copy position & rotation from the old hierarchy into the dead replacement
        CopyTransformsRecurse(transform, dead);
    }
}

static function CopyTransformsRecurse (src : Transform,  dst : Transform) {
    dst.position = src.position;
    dst.rotation = src.rotation;

    for (var child : Transform in dst) {
        // Match the transform with the same name
        var curSrc = src.Find(child.name);
        if (curSrc)
            CopyTransformsRecurse(curSrc, child);
    }
}