How can I do health bar follows enemy?

Question

Hi! I'm almost started to learning javascript and I'm doing exercises to get understanding of scripting. I'm trying to make a health bar following an enemy AI, but I don't know how to do it.

I'm not looking for someone how make the script for me, I just want someone try explain me how to do it because I tried so many times and I failed.

 static var maxHealth : float = 100 ;
 static var currentHealth : float;
 var dmg : float;
 
 var maxHealthtex : Texture2D;
 var currentHealthtex : Texture2D;
 
 var hpBarLenght : float;
 var percentOfHp : float;
 
 ...
 
 function Update () {
 percentOfHp = currentHealth/maxHealth;
 hpBarLenght = percentOfHp * 100;
 }
    
 function OnGUI() {
 if (currentHealth > 0) {
 GUI.DrawTexture(Rect(10, 10, hpBarLenght, 20), currentHealthtex);
 }
 }

I don't know how can I make GUI coordinates follows enemy.

Some suggestions?

Answer 1

Best Answer

Answer by Dazdingon · May 07, 2014 at 06:38 PM

Use : Camera.WorldToScreenPoint()

Get the on-screen position from the main camera


    var targetObject : Transform;
    var onScreenPosition : Vector3;
    onScreenPosition = Camera.main.WorldToScreenPoint(targetObject.position);

Then display the health bar above the targetObject(the enemy)

var displayRect : Rect; displayRect = Rect(onScreenPosition.x - 50, Screen.height-(onScreenPosition.y + 45), 100, 20);

 GUI.DrawTexture(displayRect, maxHealthtex);
 displayRect.width = hpBarLenght;
 GUI.DrawTexture(displayRect, currentHealthtex);

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Jotakuun · May 08, 2014 at 11:28 AM 0

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This works! Thanks you! :)

How can I do health bar follows enemy?

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