コレクトゲームアレンジ

実装の流れ

1. とりあえず全部のpublic変数を直す
2. 衝突判定をPlayer経由でGameManagerで行う
   →ここでGameOverも移行される
3. UIをGameManagerに移行
4. 衝突判定をTagからGetComponentに変更する
5. SpawnerをジェネリクスにしてPlayerのFindWithTagをやめる
   →合わせて生成可能なものだけに制限する
6. カウント処理をSpawnerに移譲する

課題後のコード

EnemyBase.cs

csharp
コピー
1using UnityEngine;
2using UnityEngine.AI;
3
4public class EnemyBase : MonoBehaviour
5{
6    public event Action DestroyNotify;
7    [SerializeField] private NavMeshAgent agent;
8    [SerializeField] private float targetChangeDistance = 1.0f;
9    [SerializeField] protected Transform target;
10
11    // Update is called once per frame
12    void Update()
13    {
14        if (target != null) agent.SetDestination(target.position);
15        float distance = Vector3.Distance(transform.position, target.position);
16        if (distance < targetChangeDistance)
17        {
18            ChangeTarget();
19        }
20    }
21
22    protected virtual void ChangeTarget()
23    {
24
25    }
26
27    public void SetTarget(Transform target)
28    {
29        this.target = target;
30    }
31
32    private void OnDestroy()
33    {
34        DestroyNotify?.Invoke();
35    }
36}

csharp
コピー
1public class FollowEnemy : EnemyBase
2{
3}

PortalEnemy.cs

csharp
コピー
1using UnityEngine;
2
3public class PatrolEnemy : EnemyBase
4{
5    [SerializeField] private Transform[] patrolPoints;
6    private int currentPointIndex;
7
8    public void Start()
9    {
10        currentPointIndex = 0;
11        target = patrolPoints[currentPointIndex];
12    }
13
14    protected override void ChangeTarget()
15    {
16        currentPointIndex++;
17        if (currentPointIndex >= patrolPoints.Length)
18        {
19            currentPointIndex = 0;
20        }
21        target = patrolPoints[currentPointIndex];
22    }
23}

Item.cs

csharp
コピー
1using System;
2using UnityEngine;
3
4public class Item : MonoBehaviour
5{
6    public event Action DestroyNotify;
7
8    private void OnDestroy()
9    {
10        DestroyNotify?.Invoke();
11    }
12}

csharp
コピー
1using UnityEngine;
2
3public abstract class SpawnerBase<T> : MonoBehaviour where T : MonoBehaviour
4{
5    [SerializeField] protected T prefab;
6    [SerializeField] private int maxInstanceNum = 3;
7    [SerializeField] private float interval = 5.0f;
8    private float timer;
9    protected int instanceNum;
10
11    // Update is called once per frame
12    void Update()
13    {
14        timer += Time.deltaTime;
15        if (timer > interval && instanceNum < maxInstanceNum)
16        {
17            Spawn();
18            timer = 0;
19        }
20    }
21    protected abstract void Spawn();
22}

EnemySpawner.cs

csharp
コピー
1using UnityEngine;
2
3public class EnemySpawner : SpawnerBase<EnemyBase>
4{
5    [SerializeField] private Transform[] spawnPoints;
6    private Transform targetTransform;
7
8    public void Initialize(Transform targetTransform)
9    {
10        this.targetTransform = targetTransform;
11    }
12
13
14    protected override void Spawn()
15    {
16        int spawnIndex = Random.Range(0, spawnPoints.Length);
17        Transform spawnPoint = spawnPoints[spawnIndex];
18        EnemyBase enemy = Instantiate(prefab, spawnPoint.position, Quaternion.identity);
19        enemy.SetTarget(targetTransform);
20        instanceNum++;
21        enemy.DestroyNotify += DestroyEnemy;
22    }
23
24    private void DestroyEnemy()
25    {
26        instanceNum--;
27    }
28}

ItemSpawner.cs

csharp
コピー
1using UnityEngine;
2
3public class ItemSpawner : SpawnerBase<Item>
4{
5    [SerializeField] private Vector2 areaRangeMin;
6    [SerializeField] private Vector2 areaRangeMax;
7
8    protected override void Spawn()
9    {
10        float x = Random.Range(areaRangeMin.x, areaRangeMax.x);
11        float z = Random.Range(areaRangeMin.y, areaRangeMax.y);
12        Vector3 pos = new Vector3(x, transform.position.y, z);
13        Item item = Instantiate(prefab, pos, Quaternion.identity);
14        instanceNum++;
15        item.DestroyNotify += ItemDestroy;
16    }
17
18    private void ItemDestroy()
19    {
20        instanceNum--;
21    }
22}

csharp
コピー
1using System;
2using UnityEngine;
3using UnityEngine.InputSystem;
4
5public class PlayerController : MonoBehaviour
6{
7    public event Action<GameObject> OnCollision;
8
9    [SerializeField] private Rigidbody rigidbody;
10    [SerializeField] private float moveSpeed = 5.0f;
11
12    // Update is called once per frame
13    void Update()
14    {
15        Keyboard keyboard = Keyboard.current;
16        Vector3 moveDirection = Vector3.zero;
17
18        if (keyboard.wKey.isPressed)
19        {
20            moveDirection += Vector3.forward;
21        }
22        else if (keyboard.aKey.isPressed)
23        {
24            moveDirection += Vector3.left;
25        }
26        else if (keyboard.sKey.isPressed)
27        {
28            moveDirection += Vector3.back;
29        }
30        else if (keyboard.dKey.isPressed)
31        {
32            moveDirection += Vector3.right;
33        }
34
35        rigidbody.linearVelocity = moveDirection * moveSpeed;
36    }
37
38    private void OnCollisionEnter(Collision collision)
39    {
40        OnCollision?.Invoke(collision.gameObject);
41    }
42
43    private void OnTriggerEnter(Collider other)
44    {
45        OnCollision?.Invoke(other.gameObject);
46    }
47}

csharp
コピー
1using UnityEngine;
2using TMPro;
3using UnityEngine.SceneManagement;
4
5public class GameManager : MonoBehaviour
6{
7    [SerializeField] private EnemySpawner enemySpawner;
8    [SerializeField] private PlayerController playerController;
9    [SerializeField] private TextMeshProUGUI hpText;
10    [SerializeField] private TextMeshProUGUI pointText;
11
12    public static int point;
13    private int hp = 3;
14
15    void Start()
16    {
17        point = 0;
18        hpText.SetText("HP : " + hp);
19        pointText.SetText("Point : " + point);
20        enemySpawner.Initialize(playerController.transform);
21        playerController.OnCollision += PlayerCollision;
22    }
23
24    private void PlayerCollision(GameObject other)
25    {
26        EnemyBase enemy = other.GetComponent<EnemyBase>();
27        if (enemy != null)
28        {
29            EnemyCollision(enemy);
30            return;
31        }
32        Item item = other.GetComponent<Item>();
33        if (item != null)
34        {
35            ItemCollision(item);
36        }
37    }
38
39    private void EnemyCollision(EnemyBase enemy)
40    {
41        hp -= 1;
42        hpText.SetText("HP : " + hp);
43        Destroy(enemy.gameObject);
44
45        if (hp <= 0)
46        {
47            SceneManager.LoadScene("Result");
48        }
49    }
50
51    private void ItemCollision(Item item)
52    {
53        point++;
54        pointText.SetText("Point : " + point);
55
56        Destroy(item.gameObject);
57    }
58}

csharp
コピー
1using UnityEngine;
2using UnityEngine.UI;
3using UnityEngine.SceneManagement;
4using TMPro;
5
6public class ResultSceneManager : MonoBehaviour
7{
8    public TextMeshProUGUI pointText;
9    public Button retryButton;
10
11    // Start is called once before the first execution of Update after the MonoBehaviour is created
12    void Start()
13    {
14        pointText.SetText("Get Point : " + GameManager.point);
15        retryButton.onClick.AddListener(Retry);
16    }
17
18    private void Retry()
19    {
20        SceneManager.LoadScene("InGame");
21    }
22}