using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using TMPro;
using UnityEngine.SceneManagement;

public class PlayerHealth : MonoBehaviour
{
    public GameObject effectPrefab;
    public AudioClip damageSound;
    public AudioClip destroySound;
    public int maxHP;
    private int HP;
    public Slider HPSlider;
    public int playerCount;
    public TextMeshProUGUI playerLabel;

    void Start()
    {
        HP = maxHP;
        HPSlider.maxValue = HP;
        HPSlider.value = HP;
        playerLabel.text = "" + playerCount;
    }

    private void OnTriggerEnter(Collider other)
    {
        if(other.CompareTag("EnemyMissile"))
        {
            HP -= 1;
            AudioSource.PlayClipAtPoint(damageSound, Camera.main.transform.position);
            Destroy(other.gameObject);

            HPSlider.value = HP;

            // ★改良
            HPZero();
        }

        // ★追加
        if(other.CompareTag("EnemyBeam"))
        {
            HP = 0;
            HPSlider.value = HP;

            HPZero();
        }
    }

    void Retry()
    {
        this.gameObject.SetActive(true);

        HP = maxHP;
        HPSlider.maxValue = HP;
        HPSlider.value = HP;

        GetComponent<PlayerMovement>().ResetMoveSpeed();
        GetComponentInChildren<FireMissile>().ResetShot();
    }

    // ★改良
    // 何度も使う処理はメソッド化すると便利（テクニック）
    // コードをこの中に移動させる。
    void HPZero()
    {
        if (HP == 0)
        {
            GameObject effect = Instantiate(effectPrefab, transform.position, Quaternion.identity);
            Destroy(effect, 1.0f);
            AudioSource.PlayClipAtPoint(destroySound, Camera.main.transform.position);

            this.gameObject.SetActive(false);

            playerCount -= 1;
            playerLabel.text = "" + playerCount;

            GetComponent<OptionController>().ResetOption();

            if (playerCount > 0)
            {
                Invoke("Retry", 1.0f);
            }
            else
            {
                SceneManager.LoadScene("GameOver");
            }
        }
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class BossCore : MonoBehaviour
{
    public Material[] materials;
    private int num = 0;
    
    // ★追加（ビーム砲）
    public GameObject beamPrefab;
    public GameObject target;

    private void Start()
    {
        StartCoroutine(ChangeColor());
    }

    // ★追加（ビーム砲）
    // 自機狙いの機能
    private void Update()
    {
        transform.LookAt(target.transform);
    }

    private IEnumerator ChangeColor()
    {
        while (true)
        {
            yield return new WaitForSeconds(5f);

            num = (num + 1) % materials.Length;
            this.gameObject.GetComponent<MeshRenderer>().material = materials[num];

            // ★追加（ビーム砲の発射）
            // ここでは０．３秒ごとにビーム砲を７個発射する。
            if (num == 3)
            {
                for (int i = 0; i < 7; i++)
                {
                    GameObject beam = Instantiate(beamPrefab, transform.position, transform.rotation);
                    Rigidbody beamRb = beam.GetComponent<Rigidbody>();
                    beamRb.AddForce(transform.forward * 1000);
                    Destroy(beam, 3.0f);

                    yield return new WaitForSeconds(0.3f);
                }
            }
        }
    }
}