using UnityEngine;
//Bulletに
public class BulletSc : MonoBehaviour
{
public GameObject explosionPrefab;
public AudioClip explosionSE;
  Rigidbody2D rid2d;
  private void Awake()
    {
  rid2d = GetComponent();
    }
 public void Init(Vector3 dir)
    {
     transform.rotation = Quaternion.FromToRotation(Vector3.up, dir);
        rid2d.linearVelocity = dir * 15f;
    }
    void Update()
    {
       Destroy(gameObject, 2);
    }

 void OnTriggerEnter2D(Collider2D coll)
    {
       if (coll.gameObject.CompareTag("Player"))
        {
     gameObject.SetActive(false);
     AudioSource.PlayClipAtPoint(explosionSE, transform.position);
      Instantiate(explosionPrefab, transform.position, Quaternion.identity);
     }
    }
}
////////////////
//Turretに
using UnityEngine;
public class Turret : MonoBehaviour
{
    [SerializeField] private BulletSc bullet;
    [SerializeField] private Transform targetPos;
    private float timer;
    Rigidbody2D rid2d;
    void Update()
    {
        timer += Time.deltaTime;
        if (timer > 1.0f)
        {
            timer = 0f;
           Shoot();
        }
     }
    void Shoot()
    {
        Vector3 dir = (targetPos.position - transform.position).normalized;
        BulletSc bulletIns = Instantiate(bullet, transform);
        bulletIns.Init(dir);
    }
}
////////////
//Turretに
using UnityEngine;

public class Rotate : MonoBehaviour
{
  [SerializeField] private Transform target;
  [SerializeField]
    private float rotationSpeed = 5f; // オブジェクトの回転速度
  //  public GameObject enemy;
 void Start()
 {
  // enemy.SetActive(false);
 }
    void Update()
    {
if (target)
        {
       Vector3 direction = target.position - transform.position;
        // 角度を求める。
        float angle = Mathf.Atan2(direction.x, direction.y);
        //オブジェクトをQuaternion.AngleAxisを使って回転させる。
        transform.rotation = Quaternion.AngleAxis(angle * Mathf.Rad2Deg - 90, Vector3.back);
        }
    }
}