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Question by dderpym · Oct 08, 2020 at 09:08 AM · getcomponent

Help with GetComponent

Making it short as possible - I'm too dumb to understand how this works but I think that

 Health tmp = gameObject.transform.root.GetComponent<Health>();

should return the Health script in the root object. However, it returns null (probably since thats what the if statement and debug log seems to say. Also, yes I do have the Hleaht script in the root object, and other scripts in the root object can reference it (with just GetComponent). Also if I'm doing things in a dumb way lmk since I tend to do that.

HitboxManager (where the problems at):

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class HitboxManager : MonoBehaviour {
     public bool isPlayer;
 
     HealthSystem hpManager;
 
     // Start is called before the first frame update
     void Start () {
         Health tmp = gameObject.transform.root.GetComponent<Health> ();
         if (tmp != null) {
             hpManager = tmp.hpManager;
             Debug.Log (hpManager.GetHP ());
         } else Debug.Log ("lol tmp didnt work xd ur bad");
     }
 
     // Update is called once per frame
     void Update () {
         //hpManager.GetHP();
     }
 
     private void OnTriggerEnter (Collider other) {
         if (isPlayer && other.gameObject.tag == "PlayerHurtbox") { } else if (other.gameObject.tag == "Hurtbox") {
             Debug.Log("lol");
             hpManager.Damage(7);
             Debug.Log (hpManager.GetHP ());
         }
     }
 }

Health Script (where hpManager is at, and also is at the root of the object while HitboxManager is at the hitbox 2 down in the societal class system defined by Unity users(i said that since i dont know the word for it shhhhh dont tell)):

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Health : MonoBehaviour
 {
     public HealthSystem hpManager;
     // Start is called before the first frame update
     void Awake()
     {
         hpManager = new HealthSystem(100);
         Debug.Log(hpManager.GetHP()+" Note: From initial health script.");
     }
 
     // Update is called once per frame
     void Update()
     {
         
     }
 }
 
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Answer by Klarzahs · Oct 08, 2020 at 05:36 PM

Hi @dderpym,

can't really find a flaw in your code, it looks correct. You definitely can access a component of the root gameobject that way. Can you upload your code to googledrive, dropbox, git, etc? I'll have a look at it, might be the easiest way.
By the way, the societal class system is also called hierarchy :)

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Answer by Verilyzed · Oct 08, 2020 at 05:39 PM

Seems alright to me. Did you check if the gameobject really has that component?

Otherwise you could also try:

GameObject.Find("name").GetComponent< Health>();

Maybe you can figure out the problem with this method.

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