Shoot fireball once in unity C#


Problem:

I made a script for shooting fireballs from a cannon, but when clicking once the cannon shoot 3 or 4 balls! do you know guys how to shoot 1 ball per 1 click?

Here's my script:

public class CannonScript : MonoBehaviour {

    public GameObject CannonBall;
    public float FirePower;

    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void FixedUpdate () {
        if(Input.GetMouseButtonDown(0)) {
            Instantiate(CannonBall, transform.position, transform.rotation);
            CannonBall.GetComponent<Rigidbody>().AddForce(0, 0, FirePower);
        }
    }

Solution:

You should use Update() for that, not FixedUpdate(). The truth is that FixedUpdate() should be strictly used for physics calculation, specifically when you are working with Rigidbodies.

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