Add: KamikazeAI

Assets/Prefabs/NPC/KamikazeAI.prefab

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Assets/Scripts/AI NPC/AutoDestroy.cs

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+using UnityEngine;
+
+public class AutoDestroy : MonoBehaviour
+{
+    // Start is called once before the first execution of Update after the MonoBehaviour is created
+    void Start()
+    {
+        
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        
+    }
+}

Assets/Scripts/AI NPC/AutoDestroy.cs.meta

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Assets/Scripts/AI NPC/KamikazeAI.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.AI;
+
+[RequireComponent(typeof(NavMeshAgent))]
+public class KamikazeAI : MonoBehaviour
+{
+    [Header("References")]
+    public Transform player;
+
+    [Header("Detection")]
+    public float detectRange = 15f;
+    private bool canSeePlayer = false;
+
+    [Header("Movement & Random Patrol")]
+    public float patrolSpeed = 2.5f;
+    public float chaseSpeed = 7f;
+    public float patrolRadius = 12f;      // Bán kính của khu vực tuần tra ngẫu nhiên
+    public float patrolWaitTime = 2f;     // Thời gian đứng nghỉ trước khi đổi sang điểm ngẫu nhiên mới
+    
+    private Vector3 startPosition;        // Tâm của khu vực tuần tra (Vị trí ban đầu)
+    private float currentWaitTime;
+    private NavMeshAgent agent;
+    private bool isExploding = false;     
+    public Node behaviorTreeRoot;
+    public GameObject explosionEffectPrefab;
+
+    private void Start()
+    {
+        agent = GetComponent<NavMeshAgent>();
+        
+        // Lưu lại vị trí xuất phát để làm tâm, NPC sẽ chỉ đi loay hoay quanh khu vực này
+        startPosition = transform.position; 
+
+        InitBehaviorTree();
+    }
+
+    private void Update()
+    {
+        if (isExploding) return;
+
+        if (player == null) FindPlayer();
+        else CheckVision();
+
+        behaviorTreeRoot?.Evaluate();
+    }
+
+    private void FindPlayer()
+    {
+        GameObject playerObj = GameObject.FindGameObjectWithTag("Player");
+        if (playerObj != null) player = playerObj.transform;
+    }
+
+    private void CheckVision()
+    {
+        if (Vector3.Distance(transform.position, player.position) <= detectRange)
+            canSeePlayer = true;
+        else
+            canSeePlayer = false;
+    }
+
+    private void InitBehaviorTree()
+    {
+        var explodeSequence = new Sequence(new List<Node>
+        {
+            new TaskNode(CheckIsCloseEnoughToExplode),
+            new TaskNode(ActionTriggerExplosion)
+        });
+
+        var chaseSequence = new Sequence(new List<Node>
+        {
+            new TaskNode(CheckCanSeePlayer),
+            new TaskNode(ActionChase)
+        });
+
+        // Hành động tuần tra ngẫu nhiên
+        var patrolNode = new TaskNode(ActionRandomPatrol);
+
+        behaviorTreeRoot = new Selector(new List<Node>
+        {
+            explodeSequence,
+            chaseSequence,
+            patrolNode
+        });
+    }
+
+    #region CONDITIONS
+
+    private NodeState CheckCanSeePlayer()
+    {
+        return canSeePlayer ? NodeState.Success : NodeState.Failure;
+    }
+
+    private NodeState CheckIsCloseEnoughToExplode()
+    {
+        if (player == null) return NodeState.Failure;
+        float dist = Vector3.Distance(transform.position, player.position);
+        return dist <= 3f ? NodeState.Success : NodeState.Failure; 
+    }
+
+    #endregion
+
+    #region ACTIONS
+
+    // HÀM TUẦN TRA NGẪU NHIÊN MỚI
+    private NodeState ActionRandomPatrol()
+    {
+        Debug.Log("Wandering randomly...");
+        agent.isStopped = false;
+        agent.speed = patrolSpeed;
+
+        // Kiểm tra xem NPC đã đi đến điểm ngẫu nhiên hiện tại chưa
+        if (!agent.pathPending && agent.remainingDistance <= agent.stoppingDistance)
+        {
+            currentWaitTime += Time.deltaTime;
+
+            // Đứng đợi hết thời gian quy định rồi mới tìm đường mới
+            if (currentWaitTime >= patrolWaitTime)
+            {
+                // 1. Lấy một điểm ngẫu nhiên trong không gian hình cầu dựa trên bán kính
+                Vector3 randomDirection = Random.insideUnitSphere * patrolRadius;
+                randomDirection += startPosition; // Cộng với tâm ban đầu để giới hạn khu vực
+
+                NavMeshHit hit;
+                // 2. Ép tọa độ ngẫu nhiên đó phải nằm TRÊN bề mặt xanh của NavMesh (tránh kẹt tường)
+                // Số 1 ở cuối là Area Mask (thường là Walkable)
+                if (NavMesh.SamplePosition(randomDirection, out hit, patrolRadius, 1))
+                {
+                    agent.SetDestination(hit.position);
+                }
+
+                currentWaitTime = 0f; // Reset thời gian chờ
+            }
+        }
+
+        return NodeState.Running;
+    }
+
+    private NodeState ActionChase()
+    {
+        if (player == null) return NodeState.Failure;
+
+        Debug.Log("Kamikaze is rushing you!");
+        agent.isStopped = false;
+        agent.speed = chaseSpeed;
+        agent.SetDestination(player.position);
+
+        return NodeState.Running;
+    }
+
+    private NodeState ActionTriggerExplosion()
+    {
+        StartCoroutine(ExplosionRoutine());
+        return NodeState.Success;
+    }
+
+    #endregion
+
+    #region EXPLOSION LOGIC
+
+    private IEnumerator ExplosionRoutine()
+    {
+        isExploding = true;
+        agent.isStopped = true;
+        agent.velocity = Vector3.zero;
+
+        Debug.Log("BOMB ARMED!");
+        yield return new WaitForSeconds(1.5f);
+
+        if (player != null)
+        {
+            float distToPlayer = Vector3.Distance(transform.position, player.position);
+            if (distToPlayer <= 4f) 
+            {
+                Debug.Log("BOOM! Player took damage!");
+            }
+        }
+
+        if (explosionEffectPrefab != null)
+        {
+            Instantiate(explosionEffectPrefab, transform.position, Quaternion.identity);
+        }
+
+        Destroy(gameObject);
+    }
+
+    #endregion
+
+    // Vẽ vùng giới hạn tuần tra màu xanh lá cây trên Scene để bạn dễ căn chỉnh độ rộng
+    private void OnDrawGizmosSelected()
+    {
+        Gizmos.color = Color.green;
+        // Nếu game đang chạy thì vẽ quanh tâm startPosition, nếu chưa chạy thì vẽ quanh vị trí hiện tại
+        Vector3 center = Application.isPlaying ? startPosition : transform.position;
+        Gizmos.DrawWireSphere(center, patrolRadius);
+    }
+}

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