~ブロック崩しを作ろう~ 3.ゲームシーンを作る

壁を作っていく

パドルを作る

using UnityEngine;

public class PaddleController : MonoBehaviour
{
    public float speed = 5f;

    void Update()
    {
        float horizontalInput = Input.GetAxisRaw("Horizontal"); // 左右の入力を取得 (GetAxisRawに変更)
        Vector2 position = transform.position;
        position.x += horizontalInput * speed * Time.deltaTime;

        // パドルが画面外に出ないように制限
        float halfWidth = GetComponent<SpriteRenderer>().bounds.size.x / 2f;
        float screenWidth = Camera.main.orthographicSize * Camera.main.aspect;
        position.x = Mathf.Clamp(position.x, -screenWidth + halfWidth, screenWidth - halfWidth);

        transform.position = position; // transform.positionを直接変更
    }
}

玉を作る

using UnityEngine;

public class BallController : MonoBehaviour
{
    public float speed = 5f;
    private Rigidbody2D rb;

    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
        // 初期速度を与える
        rb.linearVelocity = Vector2.up * speed; // 上方向に発射
    }

    private void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.gameObject.CompareTag("RedLine"))
{
   // GameManager.Instance.GameOver();
}
        if(collision.gameObject.CompareTag("Block"))
        {
            Destroy(collision.gameObject);
           // GameManager.Instance.CheckForGameClear();
        }
    }
}

ブロックを作る

タイトルに戻るボタンを作る

using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.EventSystems; // EventSystemを使用するために必要

public class BackToTitle : MonoBehaviour, IPointerClickHandler
{
    public string sceneName = "Title"; // 遷移先のシーン名

    public void OnPointerClick(PointerEventData eventData)
    {
        // クリックされた時の処理
        Debug.Log("Back to Title Button Clicked!");
        SceneManager.LoadScene(sceneName);
    }
}

using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UI;

public class ResultCanvasController : MonoBehaviour
{
    public Canvas resultCanvas; // InspectorからCanvasをアサインするための変数
    public Text resultText; // リザルトテキスト
    public string titleSceneName = "Title"; // タイトルシーン名

    void Start()
    {
        // Canvasがアサインされているか確認
        if (resultCanvas == null)
        {
            Debug.LogError("Result Canvas is not assigned!");
            return;
        }

        // 初期状態ではCanvasを非表示にする
        resultCanvas.gameObject.SetActive(false);
    }

    public void ShowResult(bool isClear)
    {
        // リザルトテキストを設定
        if (resultText != null)
        {
            resultText.text = isClear ? "ゲームクリア！" : "ゲームオーバー…";
        }

        // Canvasを表示
        resultCanvas.gameObject.SetActive(true);
    }

    public void GoToTitle()
    {
        SceneManager.LoadScene(titleSceneName);
    }
}

ゲームマネージャーの設定

using UnityEngine;
using UnityEngine.SceneManagement;

public class GameManager : MonoBehaviour
{
    public static GameManager Instance;

    public enum GameState { Playing, Clear, GameOver }
    public GameState currentGameState;

    private int blockCount;
    public ResultCanvasController resultCanvasController;

    void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
            DontDestroyOnLoad(gameObject);
        }
        else
        {
            Destroy(gameObject);
        }
    }

    void OnEnable()
    {
        SceneManager.sceneLoaded += OnSceneLoaded;
    }

    void OnDisable()
    {
        SceneManager.sceneLoaded -= OnSceneLoaded;
    }

    private void OnSceneLoaded(Scene scene, LoadSceneMode mode)
    {
        // ResultCanvasControllerの再取得
        GameObject resultCanvasObject = GameObject.FindGameObjectWithTag("ResultCanvas");
        if (resultCanvasObject != null)
        {
            resultCanvasController = resultCanvasObject.GetComponent<ResultCanvasController>();
            if (resultCanvasController == null)
            {
                Debug.LogError("ResultCanvasController component not found on the object with tag ResultCanvas");
            }
        }
        else
        {
            Debug.LogError("ResultCanvas object not found in the loaded scene.");
            resultCanvasController = null;
        }

        // Gameシーンがロードされた場合、ブロック数をリセット
        if (scene.name == "Game")
        {
            blockCount = GameObject.FindGameObjectsWithTag("Block").Length;
            Debug.Log("Block count reset to: " + blockCount); // デバッグ用ログ
        }
        // タイトルシーンがロードされた場合、ゲームの状態をリセット
        if (scene.name == "Title")
        {
            ResetGame();
        }
    }

    void Start()
    {
        currentGameState = GameState.Playing;

        //最初のシーンがGameの場合にのみ実行
        if (SceneManager.GetActiveScene().name == "Game")
        {
            if (resultCanvasController == null)
            {
                Debug.LogError("ResultCanvasController is not assigned!");
            }
        }
    }

    public void GameOver()
    {
        if (currentGameState != GameState.Playing) return;
        currentGameState = GameState.GameOver;
        Debug.Log("Game Over!");
        if (resultCanvasController != null)
        {
            resultCanvasController.ShowResult(false);
        }
    }

    public void GameClear()
    {
        if (currentGameState != GameState.Playing) return;
        currentGameState = GameState.Clear;
        Debug.Log("Game Clear!");
        if (resultCanvasController != null)
        {
            resultCanvasController.ShowResult(true);
        }
    }

    public void CheckForGameClear()
    {
        blockCount--;
        if (blockCount <= 0)
        {
            GameClear();
        }
    }

    private void ResetGame()
    {
        currentGameState = GameState.Playing;
        Debug.Log("Game state reset!"); // デバッグ用ログ
    }

    public bool IsPlaying()
    {
        return currentGameState == GameState.Playing;
    }

    public bool IsGameOver()
    {
        return currentGameState == GameState.GameOver;
    }

    public bool IsGameClear()
    {
        return currentGameState == GameState.Clear;
    }
}

テストプレイ