(유니티) player를 따라가는 HP바

HP바 프리팹 만드는법 동영상 시연

플레이어를 따라가는 HP바 기능

구조

코드

A를 누르면 hp가 1씩줄고, Player 위치를 이동시키면 hp바가 따라감
1. UIHpBarPlayer.cs

public class UIHpBarPlayer : MonoBehaviour
{
    [SerializeField] private float _gap = 1.0f;
    [SerializeField] Image _hpBarImage;
    [SerializeField] PlayerScript _player;
    Vector3 _gapPos;
    Camera _camera;
    private float _maxHp;

    private void Awake()
    {
        _camera = Camera.main;
        SetGapPos(_gap); //_gapPos 수정
    }
    public void SetGapPos(float gapValue)
    {
        _gapPos = Vector3.up * gapValue; //해당부분 left, up, forward 등으로 바꾸면서 위치 조절
    }
    void Update()
    {
        MoveHpVar();
        SetHpVar();
    }

    private void MoveHpVar() //HP바 위치 변경
    {
        if (_player != null)
        {
            Vector3 movePos = _player.transform.position + _gapPos;
            transform.position = _camera.WorldToScreenPoint(movePos);
        }
    }
    private void SetHpVar() //player체력에 맞게 체력바 설정
    {
        _hpBarImage.fillAmount = _player.GetHpRatio();
    }
}

2. PlayerScript.cs

public class PlayerScript : MonoBehaviour
{
    [SerializeField] private float _playerMaxHp = 5.0f;
    private float _playerCurrentHp;
    public float PlayerCurrentHp => _playerCurrentHp;
    private void Awake()
    {
        _playerCurrentHp = _playerMaxHp;
    }
    private void Update()
    {
        if (Input.GetKeyDown(KeyCode.A))
        {
            _playerCurrentHp = Mathf.Max(0, _playerCurrentHp - 1);
            Debug.Log(_playerCurrentHp);
        }
    }
    public float GetHpRatio() //남은 체력 비율
    {
        return _playerCurrentHp / _playerMaxHp;
    }
}