我试图做我的第一个platformer在统一。并有一些问题的弹丸。我发现了一个教程，如何创建一个弹丸移动，但没有触发器上的消防按钮。这是可能的，以改变这个脚本上的消防按钮？我试图使它与如果语句，但然后弹丸移动只有一个，它不飞：（

public class projectile : MonoBehaviour
{
    public GameObject player;
    public GameObject target;

    private float playerX;
    private float targetX;

    private float dist;
    private float nextX;
    private float baseY;
    private float height;

    public float speed = 10f; 

    void Start()
    {
        player = GameObject.FindGameObjectWithTag("Player");
        target = GameObject.FindGameObjectWithTag("Enemy");
    }

    void Update()
    {  
       Fire();           
    }

    public static Quaternion LookAtTarget(Vector2 rotation)
    {
        return Quaternion.Euler(0, 0, Mathf.Atan2(rotation.y, rotation.x) * Mathf.Rad2Deg); 
    }

    private void Fire()
    {       
        playerX = player.transform.position.x;
        targetX = target.transform.position.x;

        dist = targetX - playerX;
        nextX = Mathf.MoveTowards(transform.position.x, targetX, speed * Time.deltaTime);
        baseY = Mathf.Lerp(player.transform.position.y, target.transform.position.y, (nextX - playerX) / dist);
        height = 2 * (nextX - playerX) * (nextX - targetX) / (-0.25f * dist * dist);

        Vector3 movePosition = new Vector3(nextX, baseY + height, transform.position.z);
        transform.rotation = LookAtTarget(movePosition - transform.position);

        if (transform.position == target.transform.position)
        {
              Destroy(gameObject);
            
        }
    }
}