[solved] Collision damage and Health Controller dont work

Question

Hey everone, Im just a beginner with unity and programming. Here are the scripts which arn't working:

HealthController:

 public float startHealth = 5;
 public int startLifePoints = 3;
 private float health = 5;
 private int lifePoints = 3;

 private Animator anim;
 private PlayerController playerController;
 private bool isDead = false;
 private bool isDamageable = true;

 // Use this for initialization
 void Start  ()
 {
     anim = GetComponent<Animator>();
     playerController = GetComponent<PlayerController>();

     //der levelindex muss dem spiel entsprechend angepasst werden, wenn es eine begrüssungsszene oder eun hauptmenue gibt.
     if (Application.loadedLevel == 0)
     {
         health = startHealth;
         lifePoints = startLifePoints;
     }

     health = PlayerPrefs.GetFloat("Health");
     lifePoints = PlayerPrefs.GetInt("LifePoints");
 }
 
 void ApplyDamage (float damage)
 {
     if (isDamageable)
     {
         health -= damage;

         health = Mathf.Max(0, health);

         if (!isDead)
         {
             if (health == 0)
             {
                 isDead = true;
                 Dying();
             }
             else
             {
                 if (isDamageable)
                 {
                     Damaging();
                 }
             }

             isDamageable = false;
             Invoke("ResetIsDamageable", 1);
         }
     }
 }

 void ResetIsDamageable()
 {
     isDamageable = true;
 }

 void Dying ()
 {
     anim.SetBool("Dying", true);
     playerController.enabled = false;

     lifePoints --;

     if (lifePoints <= 0)
     {
         //start game
         Invoke("StartGame", 3);
     }
     else
     {
         // restart level
         Invoke("RestartLevel", 1);
     }
 }

 void StartGame()
 {
     Application.LoadLevel(0);
 }

 void RestartLevel()
 {
     health = startHealth;
     anim.SetBool("Dying", false);
     playerController.enabled = true;

     if (!playerController.lookingRight)
     {
         playerController.Flip();
     }
     // level neu generieren und spieler zurück setzen
 }

 void Damaging ()
 {
     anim.SetTrigger("Damage");
 }

 void OnDestroy()
 {
     PlayerPrefs.SetFloat("Health", health);
     PlayerPrefs.SetInt("LifePoints", lifePoints);
 }

CollisionDamage:

 public float damage = 1;

 void OnTriggerEnter2D(Collider2D other)
 {
     if (other.CompareTag("Player"))
     {
         other.SendMessage("ApplyDamage", damage);
     }
 }

 void OnTriggerStay2D(Collider2D other)
 {
     if (other.CompareTag("Player"))
     {
         other.SendMessage("ApplyDamage", damage);
     }
 }

}

The problem is, that the CollisionDamage-script cant use the ApplyDamage of the HealthController. this is the error message: SendMessage ApplyDamage has no receiver! UnityEngine.Component:SendMessage(String, Object) CollisionDamage:OnTriggerStay2D(Collider2D) (at Assets/Scripts/CollisionDamage.cs:20)

(these scripts are from youtube (Hummelwalker) and it works in his tutorial... :( ) Thank you for your answer! :) <3

Answer 1

Answer by Trevdevs · May 18, 2016 at 03:29 PM

Add this to the end of the SendMessage by default it looks for a receiver.

other.SendMessage("ApplyDamage", damage, SendMessageOptions.DontRequireReceiever);

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Trevdevs · May 18, 2016 at 03:20 PM 0

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Would help if i could spell, lol Send$$anonymous$$essageOptions.DontRequireReceiver);

WbrJr · May 18, 2016 at 08:47 PM 0

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Thank you very much for the quick answer! There is no error anymore, but the player dont get hurt, and no healthpoints are removed... :(

Trevdevs WbrJr · May 18, 2016 at 09:16 PM 0

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The possiblities i see to that is 1. The Player gameobject does not have the Tag "Player" on it. 2. Or health is resetting itself to its max value somewhere in your functions.

Otherwise try placing some Debug.Log's is areas where the health is updated or reset.

Try this Debug.Log here to detect a health change

  void ApplyDamage (float damage)
  {
      if (isDamageable)
      {
          health -= damage;
          health = $$anonymous$$athf.$$anonymous$$ax(0, health);
 
          Debug.Log(health);

WbrJr Trevdevs · May 19, 2016 at 06:18 AM 0

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Now I added Debug.Log("Hit") in the collider-script (below other.Send$$anonymous$$essage("ApplyDamage", damage); ), and the message appeared in the console, but the debug.Log("Health"); in the health controller didn't appear in the console. I also dont think that the health are resettet somewhere. But thaks again! :)

Answer 2

Answer by WbrJr · Jun 15, 2016 at 07:43 PM

I HAVE THE ANSWER!!! I just have to put the colliders of the Char on the Object with the health controller. I'm verry happy that I know what the problem was, but now I have a other Problem: My Char has normal long leggs, but when he pulls his legs to himself, the Collider is still in the normal position in the upper Object. My brain is so destroyd in the momend...

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[solved] Collision damage and Health Controller dont work

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