how do i change a bool from a script in a different game object c#

Questions & Answers
1

i am making a 2d platform game in the game there is a player a key and chest

i have labelled the key with the tag “chestKey”

i have a script on the chest called “ChestKey”
and a script on the player called player interaction.

in the chestKey script i have a public bool called GotKey

i want to change that bool to true from the player interaction script using ontriggerenter2d

public class ChestKey : MonoBehaviour {

    public LevelManager LevelManager;
    public int chestPoints = 250;

   public bool GotKey ;
    



	// Use this for initialization
	void Start ()
    {
        GameObject.FindGameObjectsWithTag("Player");
        GameObject.FindGameObjectsWithTag("chestKey");
        GotKey = false;
    }


    void OnTriggerEnter2D(Collider2D other)
    {

       

        if (other.tag == "Player" && GotKey)
        {
            Debug.Log("congratulations chest is open", gameObject);
            LevelManager.AddPoints(chestPoints);    
        }

        if (other.tag == "Player" && !GotKey)
        {
            Debug.Log("You Need the Key", gameObject);
        }

    }
    




    
}

player interaction Script

using UnityEngine;
using System.Collections;
using UnityEngine.SceneManagement;


public class PlayerInteraction : MonoBehaviour
{

    
    public LevelManager LevelManager;
    public HealthBar HealthBar;

    public int cogPoints = 10;
    public int gemPoints = 52;

    public GameObject Chest;
   public ChestKey chestKey;

    
    public Rigidbody2D rb;

    //reference to healthbar script so this script can find it
    void Start()
    {
       GameObject.FindGameObjectsWithTag("HealthBar");

        rb = GetComponent<Rigidbody2D>();
        chestKey = GameObject.Find("Chest").GetComponent<ChestKey>();
    }

 
void OnTriggerEnter2D(Collider2D other)
    {


        Vector2 dir = transform.position - other.transform.position;
        dir.Normalize();

        if (other.tag == "chestKey")
        {
            Debug.Log("you have the key", gameObject);
          //  Chest.GetComponent<>;
        }



        //add cog points to score
        if (other.tag == "Cog")
        {
           
            LevelManager.AddPoints(cogPoints);
        }


        //add gem points to score
        if (other.tag == "Gem")
        {
           
            LevelManager.AddPoints(gemPoints);
        }

      

        //Health pick up add 40 to health
        if (other.tag == "Health")
        {
            HealthBar.curHealth += 40;
            
        }

        // NME takes health of player
        if (other.tag == "NME")
        {
            HealthBar.curHealth -= 10;
            //makes player bounce if hit by enemy
            Rigidbody2D rbOther = this.gameObject.GetComponent<Rigidbody2D>();
            rbOther.AddForce(dir * 1500 );// *Time.deltaTime);
           // Debug.Log(rbOther);
        }
        // if current health = 0 load gameover screen
        if (HealthBar.curHealth == 0)
        {
            SceneManager.LoadScene(1);

        }
    }
}

i cant seem to get the reference right can anyone help?

2

Hi Mike,

First of all, please start your variable names with lowercase, only use uppercase for properties and functions.

Here how to set an boolean

void OnTriggerEnter2D(Collider2D other) {
 
         if (other.tag == "chestKey") {
             Debug.Log("you have the key", gameObject);
             chest.gotKey = true;
             // Destroy(other.gameObject); // to detroy the key
         }
}

I also recommend to check Delegates - Unity Learn so you can cast an event when you hit the key.