ブロック崩し1

手順

１）四隅を囲う
２）ボールを配置する
３）PhysicsMaterial2Dを作成する
→ボールと四角に設定
４）ボールのスクリプトを作る
（当たり判定以外）
５）ブロック配置、Ballで削除
６）クリアUI作成
７）Managerを作成し終了判定

PhysicsMaterial2D

BounceMaterial:Bounciness=1, Friction=0
対象：上左右の壁、ボール

FloorMaterial:Bounciness=0, Friction=0
対象：床

スクリプト

BallState.cs

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

csharp
コピー
1using UnityEngine;
2using UnityEngine.InputSystem;
3
4public class Ball : MonoBehaviour
5{
6    [SerializeField] private float launchSpeed = 8f;
7    [SerializeField] private GameManager gameManager;
8    private BallState state = BallState.Idle;
9    private Rigidbody2D rigidbody2d;
10    private Camera mainCamera;
11
12    void Awake()
13    {
14        rigidbody2d = GetComponent<Rigidbody2D>();
15        rigidbody2d.gravityScale = 0f;
16        mainCamera = Camera.main;
17    }
18
19    void Update()
20    {
21        if (state != BallState.Idle) return;
22
23        Pointer pointer = Pointer.current;
24        if (pointer == null || !pointer.press.wasPressedThisFrame) return;
25
26        Vector2 screenPos = pointer.position.ReadValue();
27        Vector3 worldPos = mainCamera.ScreenToWorldPoint(
28            new Vector3(screenPos.x, screenPos.y, -mainCamera.transform.position.z));
29
30        Vector2 dir = ((Vector2)worldPos - (Vector2)transform.position).normalized;
31        rigidbody2d.linearVelocity = dir * launchSpeed;
32        state = BallState.Flying;
33    }
34
35    void OnCollisionEnter2D(Collision2D collision)
36    {
37        if (collision.collider.CompareTag("Block"))
38        {
39            Destroy(collision.gameObject);
40            gameManager.NotifyBlockDestroyed();
41            return;
42        }
43
44        if (state == BallState.Flying && collision.collider.CompareTag("Floor"))
45        {
46            rigidbody2d.linearVelocity = Vector2.zero;
47            state = BallState.Idle;
48        }
49    }
50}

csharp
コピー
1using UnityEngine;
2
3public class GameManager : MonoBehaviour
4{
5    [SerializeField] private GameObject clearUIPanel;
6
7    private int remainingBlocks;
8
9    void Start()
10    {
11        clearUIPanel.SetActive(false);
12        remainingBlocks = GameObject.FindGameObjectsWithTag("Block").Length;
13    }
14
15    public void NotifyBlockDestroyed()
16    {
17        remainingBlocks--;
18        if (remainingBlocks <= 0)
19        {
20            clearUIPanel.SetActive(true);
21        }
22    }
23}
24