플레이어 HPBar

Assets/02_Scripts/UI/PlayerHpBarUI.cs

@@ -0,0 +1,160 @@
+using UnityEngine;
+using UnityEngine.UI;
+
+// Screen-space HP bar for the player HUD.
+// Enemy HP bars can keep using the SpriteRenderer-based HpBar.
+public class PlayerHpBarUI : MonoBehaviour
+{
+    [SerializeField] private Health _health;
+    [SerializeField] private Image _fillImage;
+    [SerializeField] private bool _autoFindPlayerHealth = true;
+    [SerializeField] private bool _autoFindFillImageInChildren = true;
+    [SerializeField] private bool _configureAsFilledImage = true;
+    [SerializeField] private float _smoothSpeed = 0f;
+
+    [Header("Color Thresholds")]
+    [SerializeField] private Color _highColor = new Color(0.2f, 0.9f, 0.3f, 1f);
+    [SerializeField] private Color _midColor = new Color(1f, 0.85f, 0.2f, 1f);
+    [SerializeField] private Color _lowColor = new Color(0.95f, 0.25f, 0.25f, 1f);
+    [SerializeField, Range(0f, 1f)] private float _midThreshold = 0.5f;
+    [SerializeField, Range(0f, 1f)] private float _lowThreshold = 0.2f;
+
+    private float _currentRatio = 1f;
+    private float _targetRatio = 1f;
+
+    private void Awake()
+    {
+        ResolveFillImage();
+        ResolveHealth();
+        ConfigureFillImage();
+    }
+
+    private void OnEnable()
+    {
+        ResolveFillImage();
+        ResolveHealth();
+        ConfigureFillImage();
+
+        if (_health == null) return;
+
+        _health.OnHealthChanged += HandleHealthChanged;
+        HandleHealthChanged(_health.CurrentHealth, _health.MaxHealth);
+    }
+
+    private void OnDisable()
+    {
+        if (_health != null)
+            _health.OnHealthChanged -= HandleHealthChanged;
+    }
+
+    private void Start()
+    {
+        ResolveFillImage();
+        ResolveHealth();
+        ConfigureFillImage();
+
+        if (_health != null)
+            HandleHealthChanged(_health.CurrentHealth, _health.MaxHealth);
+    }
+
+    private void Update()
+    {
+        if (_fillImage == null || _smoothSpeed <= 0f) return;
+        if (Mathf.Approximately(_currentRatio, _targetRatio)) return;
+
+        _currentRatio = Mathf.MoveTowards(_currentRatio, _targetRatio, _smoothSpeed * Time.deltaTime);
+        ApplyFill();
+    }
+
+    public void Bind(Health health)
+    {
+        if (_health == health) return;
+
+        if (isActiveAndEnabled && _health != null)
+            _health.OnHealthChanged -= HandleHealthChanged;
+
+        _health = health;
+
+        if (isActiveAndEnabled && _health != null)
+        {
+            _health.OnHealthChanged += HandleHealthChanged;
+            HandleHealthChanged(_health.CurrentHealth, _health.MaxHealth);
+        }
+    }
+
+    private void HandleHealthChanged(int current, int max)
+    {
+        _targetRatio = max > 0 ? Mathf.Clamp01((float)current / max) : 0f;
+
+        if (_smoothSpeed <= 0f)
+        {
+            _currentRatio = _targetRatio;
+            ApplyFill();
+        }
+
+        ApplyColor(_targetRatio);
+    }
+
+    private void ApplyFill()
+    {
+        if (_fillImage == null) return;
+        _fillImage.fillAmount = Mathf.Clamp01(_currentRatio);
+    }
+
+    private void ApplyColor(float ratio)
+    {
+        if (_fillImage == null) return;
+
+        if (ratio <= _lowThreshold)
+            _fillImage.color = _lowColor;
+        else if (ratio <= _midThreshold)
+            _fillImage.color = _midColor;
+        else
+            _fillImage.color = _highColor;
+    }
+
+    private void ResolveHealth()
+    {
+        if (_health != null || !_autoFindPlayerHealth) return;
+
+        PlayerController player = FindFirstObjectByType<PlayerController>();
+        if (player != null)
+            _health = player.GetComponent<Health>();
+    }
+
+    private void ResolveFillImage()
+    {
+        if (_fillImage != null || !_autoFindFillImageInChildren) return;
+
+        Transform fill = FindChildByName(transform, "Fill");
+        if (fill != null)
+            _fillImage = fill.GetComponent<Image>();
+    }
+
+    private Transform FindChildByName(Transform parent, string childName)
+    {
+        if (parent == null) return null;
+
+        for (int i = 0; i < parent.childCount; i++)
+        {
+            Transform child = parent.GetChild(i);
+            if (child.name == childName)
+                return child;
+
+            Transform nested = FindChildByName(child, childName);
+            if (nested != null)
+                return nested;
+        }
+
+        return null;
+    }
+
+    private void ConfigureFillImage()
+    {
+        if (_fillImage == null || !_configureAsFilledImage) return;
+
+        _fillImage.type = Image.Type.Filled;
+        _fillImage.fillMethod = Image.FillMethod.Horizontal;
+        _fillImage.fillOrigin = (int)Image.OriginHorizontal.Left;
+    }
+}

Assets/02_Scripts/UI/PlayerHpBarUI.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 0ce8dd9c4b8941e2a69bbe4864891425