2D sidescroller health bar

Question

I am new to coding and Unity

I have the health bar appearing on my screen, but I am not sure how to link the Health script of the health bar to my player script and my player's health script. Simply, I want to make it so when my player gets shot my health bar will lose a heart. The health script of the player's is also linked to the enemy.

My health bar is made with a GUITexture heart

I used this video for the health bar and now I need to figure out how to incorporate the health bar script with my health script and and player script

I get the impression that I need to include some lines of code from my health bar script or link it/reference it some how in my player script

https://www.youtube.com/watch?v=-z-KLXPPGmg

my code is in the link in the same question that I asked on stack overflow...

http://stackoverflow.com/questions/23207298/unity-2d-health-bar

Answer 1

Best Answer

Answer by getyour411 · Apr 23, 2014 at 01:08 AM

The simple way to get Script A to interact with Script B is:

On Script A

public ScriptBName scriptBName;

in the Inspector, a field will appear called scriptBName (for the gameobject Script A is attached to)

Drag/drop the gameobject that Script B is attached to into that field; voila

Now in Script A you can access (public) fields, methods etc on Script B by doing something like

 if(scriptBName.someVar) //

or

 if(PlayerGotSmacked)
 scriptBName.health --;

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RNVitter · Apr 23, 2014 at 01:14 AM 0

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It worked! You must be an angel man, I've been stuck on this forever! Thanks a lot!

Answer 2

Answer by koray1396 · Apr 22, 2014 at 05:20 PM

I can not go over all the scripts there, but as a simple way;

 int = numberOfLives;
 public List<GUITexture> hearts; // or array, does not matter, you should assign GUITexture objects from the inspector, 5 of them if you have a max of 5 lives
 void HealthBar(){
     for(int i = 1; i <= hearts.Count; i++){
        if(i <= numberOfLives){
             hearts[i].gameObject.SetActive(true);
        } else {
             hearts[i].gameObject.SetActive(false);
        }
     }
 }

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RNVitter · Apr 22, 2014 at 05:31 PM 0

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which script would I put that under?

koray1396 · Apr 22, 2014 at 06:11 PM 0

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does not matter, you can put it into any script, you only need to track number of lives. you would call HealthBar() only when needed, such as when a life is lost etc... by looking at your "Health" script, i'm not sure how you calculate the health as an integer, it's far too complex for such thing.

okay, here's a quick simpler one.

 public List<GUITexture> hearts;
 int numberOfLives; 
 public float startHealth;
 float currentHealth;
 public float heartSpace;
 
 void Awake(){
     PlaceHearts();
     HealthBar();
 }
 
 void HealthBar(){
     for(int i = 1; i <= hearts.Count; i++){
        if(i <= numberOfLives){
             hearts[i].gameObject.SetActive(true);
        } else {
             hearts[i].gameObject.SetActive(false);
        }
     }
 }
 void Update(){
     numberOfLives = $$anonymous$$athf.CeilToInt((currentHealth / startHealth) * hearts.Count);
     HealthBar();
 }
 
 void PlaceHearts(){
     for(int i = 0; i < hearts.Count; i++){
         hearts[i].pixelInset = new Rect(Screen.width * (0.1f + (i * heartSpace)), Screen.height * 0.9f, Screen.width * 0.1f, Screen.width * 0.1f);
     }
 }

RNVitter · Apr 22, 2014 at 06:17 PM 0

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I'm not keeping track of lives but hitpoints, the player has a 100 points of health and a each heart equals 10 points of health. I have all the code for the health bar and it appears on the screen but nothing happens to the health bar when the player takes damage so I get the impression that I need to include some lines of code from my health bar script or link it/reference it some how in my player script

2D sidescroller health bar

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