ブロック崩し3

ブロック崩し2のプロジェクトを変更する形にする
→フォルダコピーしてリネーム、UnityHubから追加してみる
以降は課題にする

課題の解説後、メリットを説明
Start/Awakeをいたるところで書くと、どこで何が起きているか見つけにくくなる
→仕様変更やバグ修正が大変

GameManagerに集約することで、GameManagerを見ればゲームの全体像がわかるようになる
→これはプロの現場ではよくやる手法

スクリプト

StageGenerator.cs

csharp
コピー
1using UnityEngine;
2
3public class StageGenerator : MonoBehaviour
4{
5    [SerializeField] private GameObject block;
6    [SerializeField] private GameObject coin;
7    [SerializeField] private int marginX;
8    [SerializeField] private int marginY;
9    [SerializeField] private int row;
10    [SerializeField] private int column;
11
12    // Start is called once before the first execution of Update after the MonoBehaviour is created
13    public void Initialize(out int blockCount)
14    {
15        blockCount = 0;
16        var basePosition = transform.position;
17        for (int i = 0; i < row; i++)
18        {
19            int coinNumber = Random.Range(0, row);
20            for (int j = 0; j < column; j++)
21            {
22                Vector3 pos = basePosition + new Vector3(j * marginX, -i * marginY, 0);
23                if (j == coinNumber)
24                {
25                    Instantiate(coin, pos, Quaternion.identity);
26                }
27                else
28                {
29                    Instantiate(block, pos, Quaternion.identity);
30                    blockCount++;
31                }
32            }
33        }
34    }
35
36    // Update is called once per frame
37    void Update()
38    {
39
40    }
41}

csharp
コピー
1public enum BallState
2{
3    Idle,
4    Flying
5}

csharp
コピー
1using System;
2using UnityEngine;
3using UnityEngine.InputSystem;
4
5public class Ball : MonoBehaviour
6{
7    public Action<GameObject> OnCollision;
8    public BallState State => state;
9
10    [SerializeField] private float launchSpeed = 8f;
11    [SerializeField] private Rigidbody2D rigidbody2d;
12
13    private BallState state = BallState.Idle;
14
15    void Update()
16    {
17        if (state != BallState.Idle) return;
18
19        Pointer pointer = Pointer.current;
20        if (pointer == null || !pointer.press.wasPressedThisFrame) return;
21
22        Vector2 screenPos = pointer.position.ReadValue();
23        Vector3 worldPos = Camera.main.ScreenToWorldPoint(
24            new Vector3(screenPos.x, screenPos.y, -Camera.main.transform.position.z));
25
26        Vector2 dir = ((Vector2)worldPos - (Vector2)transform.position).normalized;
27        rigidbody2d.linearVelocity = dir * launchSpeed;
28        state = BallState.Flying;
29    }
30
31    void OnCollisionEnter2D(Collision2D collision)
32    {
33        OnCollision?.Invoke(collision.gameObject);
34    }
35
36    void OnTriggerEnter2D(Collider2D other)
37    {
38        OnCollision?.Invoke(other.gameObject);
39    }
40
41    public void Stop()
42    {
43        if (state != BallState.Flying) return;
44        rigidbody2d.linearVelocity = Vector2.zero;
45        state = BallState.Idle;
46    }
47}

csharp
コピー
1using UnityEngine;
2using TMPro;
3
4public class GameManager : MonoBehaviour
5{
6    [SerializeField] private Ball ball;
7    [SerializeField] private GameObject clearUIPanel;
8    [SerializeField] private StageGenerator stageGenerator;
9    [SerializeField] private TextMeshProUGUI scoreText;
10
11    private int remainingBlocks;
12    private int score;
13
14    void Start()
15    {
16        clearUIPanel.SetActive(false);
17        stageGenerator.Initialize(out remainingBlocks);
18
19        ball.OnCollision += CollisionBall;
20        scoreText.text = "Score: " + score;
21    }
22
23    private void CollisionBall(GameObject other)
24    {
25        switch (other.tag)
26        {
27            case "Block":
28                BlockCollision(other);
29                return;
30            case "Floor":
31                FloorCollision();
32                return;
33            case "Coin":
34                CoinCollision(other);
35                return;
36        }
37    }
38
39    private void BlockCollision(GameObject block)
40    {
41        Destroy(block);
42        remainingBlocks--;
43        if (remainingBlocks <= 0)
44        {
45            clearUIPanel.SetActive(true);
46        }
47    }
48
49    private void FloorCollision()
50    {
51        ball.Stop();
52    }
53
54    private void CoinCollision(GameObject coin)
55    {
56        Destroy(coin);
57        score++;
58        scoreText.text = "Score: " + score;
59    }
60}