ai and player nd health scripts

Assets/Scripts/Barrier.cs

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+using UnityEngine;
+using UnityEngine.AI;
+
+/// <summary>
+/// Attach to any door/window barrier the zombie should break through.
+///
+/// Setup:
+///   - Add a NavMeshObstacle component (Carve = true) so the NavMesh treats it as blocked.
+///   - Assign the barrier's layer to match AIBehaviour.barrierLayer.
+///   - Optionally populate the 'boards' array with child visuals that get hidden as health drops.
+/// </summary>
+public class Barrier : MonoBehaviour
+{
+    [Header("Health")]
+    public float maxHealth = 100f;
+
+    [Header("Board Visuals (optional)")]
+    [Tooltip("Child objects representing planks/boards. They are hidden progressively as health drops.")]
+    public GameObject[] boards;
+
+    public bool IsDestroyed { get; private set; }
+
+    private float _health;
+    private NavMeshObstacle _obstacle;
+
+    void Awake()
+    {
+        _health   = maxHealth;
+        _obstacle = GetComponent<NavMeshObstacle>();
+    }
+
+    public void TakeDamage(float damage)
+    {
+        if (IsDestroyed) return;
+
+        _health -= damage;
+        UpdateBoards();
+
+        if (_health <= 0f)
+            Break();
+    }
+
+    void UpdateBoards()
+    {
+        if (boards == null || boards.Length == 0) return;
+
+        // Show boards proportional to remaining health
+        int boardsToShow = Mathf.CeilToInt((_health / maxHealth) * boards.Length);
+        for (int i = 0; i < boards.Length; i++)
+        {
+            if (boards[i] != null)
+                boards[i].SetActive(i < boardsToShow);
+        }
+    }
+
+    void Break()
+    {
+        IsDestroyed = true;
+
+        // Disable the NavMesh obstacle so pathfinding opens back up
+        if (_obstacle != null)
+            _obstacle.enabled = false;
+
+        // Disable colliders so zombies walk through
+        foreach (Collider col in GetComponentsInChildren<Collider>())
+            col.enabled = false;
+
+        // Hide visuals
+        foreach (GameObject board in boards)
+            if (board != null) board.SetActive(false);
+
+        Destroy(gameObject, 0.1f);
+    }
+
+#if UNITY_EDITOR
+    void OnDrawGizmosSelected()
+    {
+        Gizmos.color = new Color(1f, 0.5f, 0f, 0.5f);
+        Gizmos.DrawWireCube(transform.position, transform.localScale);
+    }
+#endif
+}