20240823 TIL-2

모바일게임개발 3주차 강의. [고양이 밥주기 게임]

그림과 같이 생선가게 주인 강아지가 몰려오는 고양이에게 밥을 던져 배를 채워서 내쫓는 게임을 만들어보았다.

• GameObject - Dog
  생선가게 주인 강아지

public class Dog : MonoBehaviour
{
    public GameObject food;

    // Start is called before the first frame update
    void Start()
    {
        InvokeRepeating("MakeFood", 0f, 0.2f);
    }

    private void Update()
    {
        Vector2 mousePos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
        float x = mousePos.x;

        if (x > 9.2f)
        {
            x = 9.2f;
        }
        if (x < -9.2f)
        {
            x = -9.2f;
        }

        transform.position = new Vector2(x, transform.position.y);
    }

    void MakeFood()
    {
        float x1 = transform.position.x + 2.65f;
        float x2 = transform.position.x - 2.8f;
        float y = transform.position.y + 0.5f;
        Instantiate(food, new Vector2(x1, y), Quaternion.identity);
        Instantiate(food, new Vector2(x2, y), Quaternion.identity);
    }
}

• GameObject - Food
  생선가게 주인 강아지가 쏘는 오브젝트.
  Rigidbody 2D - Body Type - Kinetic

public class Food : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        transform.position += Vector3.up * 0.5f;
        if (transform.position.y > 27.0f)
        {
            Destroy(gameObject);
        }
    }
}

• GameObject - Cat
  생선가게로 달려오는 고양이. Food에 맞으면 energy가 차고 full이 되면 배부른 고양이로 변해서 옆으로 나간다.

public class Cat : MonoBehaviour
{
    public GameObject hungryCat;
    public GameObject fullCat;
    public RectTransform front;

    public int type;

    float full = 5.0f;
    float energy = 0.0f;
    float speed = 0.05f;

    bool isFull = false;

    // Start is called before the first frame update
    void Start()
    {
        float x = Random.Range(-9.0f, 9.0f);
        float y = 30.0f;
        transform.position = new Vector2(x, y);

        if (type == 1)
        {
            speed = 0.05f;
            full = 5f;
        }
        else if (type == 2)
        {
            speed = 0.02f;
            full = 10f;
        }
        else if (type == 3)
        {
            transform.localScale = new Vector2(0.8f, 0.8f);
            speed = 0.1f;
            full = 5f;
        }
    }

    // Update is called once per frame
    void Update()
    {
        if (energy < full) 
        { 
            transform.position += Vector3.down * speed;
            if (transform.position.y < -16.0f)
            {
                GameManager.Instance.GameOver();
            }
        }
        else
        {
            if (transform.position.x > 0)
            {
                transform.position += Vector3.right * 0.05f;
            }
            else
            {
                transform.position += Vector3.left * 0.05f;
            }
        }
    }

    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.gameObject.CompareTag("Food"))
        {
            if (energy < full)
            {
            energy += 1.0f;
            front.localScale = new Vector3(energy / full, 1.0f, 1.0f);
            Destroy(collision.gameObject);
                if (energy == full)
                {
                    if (!isFull)
                    {
                        isFull = true;
                        hungryCat.SetActive(false);
                        fullCat.SetActive(true);
                        Destroy(gameObject);
                        GameManager.Instance.AddScore();
                    }
                }
            }
        }
    }
}

• GameManager
  • MakeCat() : 고양이 prefabs 생성 로직. 레벨마다 나오는 고양이 타입이 다르다.
  • AddScore() : 레벨 계산 로직

public class GameManager : MonoBehaviour
{
    public static GameManager Instance;

    public GameObject normalCat;
    public GameObject fatCat;
    public GameObject pirateCat;
    public GameObject retryBtn;

    public RectTransform levelFront;
    public Text levelTxt;

    int level = 0;
    int score = 0;

    private void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
        }
        Application.targetFrameRate = 60;
    }

    // Start is called before the first frame update
    void Start()
    {
        Time.timeScale = 1.0f;
        InvokeRepeating("MakeCat", 0f, 1f);
    }

    void MakeCat()
    {
        Instantiate(normalCat);

        if (level == 1)
        {
            int p = Random.Range(0, 10);
            if (p < 2) Instantiate(normalCat);
        }
        else if (level == 2)
        {
            int p = Random.Range(0, 10);
            if (p < 5) Instantiate(normalCat);
        }
        else if (level == 3)
        {
            Instantiate(fatCat);
        }
        else if (level == 4)
        {
            Instantiate(pirateCat);
        }
        else if (level >= 5)
        {
            Instantiate(fatCat);
            Instantiate(pirateCat);
        }
    }

    public void GameOver()
    {
        retryBtn.SetActive(true);
        Time.timeScale = 0.0f;
    }

    public void AddScore()
    {
        score++;
        level = score / 5;
        levelTxt.text = level.ToString();
        levelFront.localScale = new Vector3((score - level * 5) / 5.0f, 1f, 1f);
    }
}