I don't understand the mistake, I'm a newbie

Unity Engine
1

Error:
NullReferenceException: Object reference not set to an instance of an object
VidaExtra.SumaDeVida (UnityEngine.Collider player) (at Assets/Scripts/VidaExtra.cs:35)
VidaExtra.OnTriggerEnter (UnityEngine.Collider other) (at Assets/Scripts/VidaExtra.cs:26)

public class VidaExtra : MonoBehaviour
{
    public int CantidadDeVida;

    Health Vida;


    private void Awake()
    {

        Vida = GetComponent<Health>();

    }

    void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("Player"))
        {
            SumaDeVida(other);

        }

    }


    void SumaDeVida(Collider player)
    {
        CantidadDeVida += Vida.currenthealth;

       // Destroy(gameObject);
    }
}
2

Did you attach a “Health” component to the same GameObject this script is running on?

3

how?

4

By dragging the “Health” script onto the object in the inspector, the same way you attach any script.

5

necessary? because I’m calling him, I don’t know if it’s necessary to put it

6

In Awake, check to make sure that Vida is not null.

1 Like
7

Completely necessary. GetComponent expects the component (in this case a script) to be attached to the Game Object that it’s being called on. If a component isn’t there it will return null and then when you go to use it you will get the error messages you’re getting now.

2 Likes
8

I already solved the problem, thank you all