I’m trying to make a game where you can make custom projectiles with various components that have special properties (like poison, explosions, anti-gravity, mind control).
Then you would be able to put that bullet in a gun.

I’m thinking of using OnCollisionEnter and a box collider to get the GameObject and then use a raycast that would get the gun script on a gun and change the projectile reference to the projectile in the box collider.

Before I actually try that though, I want to make sure I know how to assign a reference in game.

I’ve looked everywhere online and I have not been able to find any information on how to make a script that lets the player change the reference of a gameobject. My gun script currently works by instantiating a projectile prefab through a public gameobject reference.

Here are my current script for guns and projectiles, these are placeholders until I can better understand how to change variables and such in gametime and outside of the scene editor.

public class Projectile : MonoBehaviour
{
    public float damage = 10f;
    [SerializeField] float speed = 10f;
    private Rigidbody projectile;

    void Start()
    {
        projectile = GetComponent<Rigidbody>();
    }

    void Update()
    {
        projectile.AddForce(transform.forward * Time.deltaTime * speed, ForceMode.Impulse);
    }

    private void OnCollisionEnter(Collision collision)
    {
        Destroy(gameObject);
    }
}

public class Gun : MonoBehaviour
{
    public GameObject bullet;
    public Transform muzzle;
    public int magazineSize;
    public int bulletsInMag;
    public float reloadTime = 3;
    bool reloading = false;

    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Mouse0) && bulletsInMag > 0)
        {
            Shoot();
        }
        else if ((Input.GetKeyDown(KeyCode.Mouse0) && bulletsInMag <= 0 && !reloading))
        {
            Reload();
        }
    }

    private void Shoot()
    {
        Instantiate(bullet, muzzle.position, muzzle.rotation);
        bulletsInMag--;
    }

    private void Reload()
    {
        reloading = true;
        StartCoroutine(ReloadTime());
    }

    IEnumerator ReloadTime()
    {
        yield return new WaitForSeconds(reloadTime);
        bulletsInMag = magazineSize;
        reloading = false;
    }
}