koobas.hobune.stream
The infamous: Object Reference not set to an instance of an object
Been looking everywhere on how to fix this error in my script. It errors on hp = hp - playerShot.damage; Mono autofills it in so I know it at least sees it. I get no console warnings until I shoot the enemy and get "NullReferenceException: Object reference not set to an instance of an object Enemy.OnTriggerEnter2D (UnityEngine.Collider2D other) (at Assets/Scripts/Enemy/Enemy.cs:47)"
Enemy.cs
public class Enemy : MonoBehaviour {
public int hp = 10;
void OnTriggerEnter2D(Collider2D other) {
if (other.tag == "Boundary") {
return;
}
PlayerShot playerShot = GetComponent<PlayerShot>();
hp = hp - playerShot.damage;
if (hp <= 0){
Destroy (gameObject);
Destroy (other.gameObject);
Instantiate (explosion, transform.position, transform.rotation);
}
}
}
PlayerShot.cs
public class PlayerShot : MonoBehaviour {
public int speed = 0;
public float lifetime;
public int damage = 1;
void Start () {
rigidbody2D.velocity = transform.up.normalized * speed;
Destroy (gameObject, lifetime);
}
}
Best Answer
You use GetComponent inside your Enemy script however i guess your PlayerShot script is not attached to your Enemy or is it?
You probably want this instead:
PlayerShot playerShot = other.GetComponent<PlayerShot>();
In addition you should check if the object that collides with the Enemy actually has a PlayerShot script attached by doing a null check before using your playerShot variable:
if (playerShot != null)
{
hp = hp - playerShot.damage;
// ...
}
