적 AI에 어그로 시스템 추가

Assets/Scripts/EnemyAIController.cs

@@ -2,6 +2,7 @@ using Unity.Netcode;
 using UnityEngine;
 using UnityEngine.AI;
 using System.Collections;
+using System.Collections.Generic;
 
 namespace Northbound
 {
@@ -65,6 +66,25 @@ namespace Northbound
         [Tooltip("이 크립이 속한 캠프 (null이면 독립 크립)")]
         public CreepCamp creepCamp;
 
+        [Header("Aggro System")]
+        [Tooltip("어그로(위협도) 시스템 활성화")]
+        public bool enableAggroSystem = true;
+
+        [Tooltip("데미지당 어그로 증가량")]
+        public float damageAggroMultiplier = 2f;
+
+        [Tooltip("어그로 감쇠율 (초당)")]
+        public float aggroDecayRate = 5f;
+
+        [Tooltip("새 타겟 전환에 필요한 최소 어그로 차이")]
+        public float aggroSwitchThreshold = 20f;
+
+        [Tooltip("타겟 재평가 주기 (초)")]
+        public float targetReevaluateInterval = 1f;
+
+        [Tooltip("거리 기반 타겟 전환 허용 거리차")]
+        public float distanceSwitchThreshold = 5f;
+
         private NavMeshAgent _agent;
         private EnemyUnit _enemyUnit;
         private Core _core;
@@ -96,6 +116,11 @@ namespace Northbound
         private float _attackStartTime;
         private const float ATTACK_TIMEOUT = 1f; // 애니메이션 이벤트 미발생 시 타임아웃
 
+        // 어그로 시스템
+        private Dictionary<ulong, float> _aggroTable = new Dictionary<ulong, float>();
+        private float _lastTargetReevaluateTime;
+        private System.Action<ulong, int> _damageTakenHandler;
+
         public override void OnNetworkSpawn()
         {
             base.OnNetworkSpawn();
@@ -131,6 +156,13 @@ namespace Northbound
                 if (_enemyUnit != null)
                 {
                     _enemyUnit.OnDeath += HandleDeath;
+
+                    // 데미지 받음 이벤트 구독 (어그로 시스템)
+                    if (enableAggroSystem)
+                    {
+                        _damageTakenHandler = (attackerId, damage) => HandleDamageTaken(attackerId, damage);
+                        _enemyUnit.OnDamageTaken += _damageTakenHandler;
+                    }
                 }
             }
         }
@@ -140,6 +172,11 @@ namespace Northbound
             if (_enemyUnit != null)
             {
                 _enemyUnit.OnDeath -= HandleDeath;
+
+                if (_damageTakenHandler != null)
+                {
+                    _enemyUnit.OnDamageTaken -= _damageTakenHandler;
+                }
             }
             base.OnNetworkDespawn();
         }
@@ -149,6 +186,12 @@ namespace Northbound
             if (!IsServer) return;
             if (!_agent.isOnNavMesh) return;
 
+            // 어그로 시스템 업데이트
+            if (enableAggroSystem)
+            {
+                ReevaluateTarget();
+            }
+
             switch (_currentState.Value)
             {
                 case EnemyAIState.Idle: UpdateIdle(); break;
@@ -425,8 +468,20 @@ namespace Northbound
             _cachedTargetPlayer = target;
 
             var networkObject = target.GetComponentInParent<NetworkObject>();
-            if (networkObject != null) _targetPlayerId.Value = networkObject.NetworkObjectId;
-            else _targetPlayerId.Value = 0;
+            if (networkObject != null)
+            {
+                _targetPlayerId.Value = networkObject.NetworkObjectId;
+
+                // 타겟 설정 시 기본 어그로 부여 (최초 감지)
+                if (enableAggroSystem && !_aggroTable.ContainsKey(networkObject.NetworkObjectId))
+                {
+                    _aggroTable[networkObject.NetworkObjectId] = 10f; // 기본 어그로
+                }
+            }
+            else
+            {
+                _targetPlayerId.Value = 0;
+            }
         }
 
         private void ClearTargetPlayer()
@@ -587,6 +642,242 @@ namespace Northbound
 
         #endregion
 
+        #region Aggro System
+
+        private void HandleDamageTaken(ulong attackerId, int damage)
+        {
+            if (!IsServer) return;
+            if (!enableAggroSystem) return;
+
+            // 공격자에게 어그로 추가
+            AddAggro(attackerId, damage * damageAggroMultiplier);
+
+            // 즉시 타겟 전환 고려
+            ConsiderTargetSwitch(attackerId);
+        }
+
+        private void AddAggro(ulong attackerId, float amount)
+        {
+            if (_aggroTable.ContainsKey(attackerId))
+            {
+                _aggroTable[attackerId] += amount;
+            }
+            else
+            {
+                _aggroTable[attackerId] = amount;
+            }
+        }
+
+        private void DecayAggro()
+        {
+            List<ulong> keysToRemove = new List<ulong>();
+
+            foreach (var kvp in _aggroTable)
+            {
+                float newAggro = kvp.Value - aggroDecayRate * Time.deltaTime;
+                if (newAggro <= 0)
+                {
+                    keysToRemove.Add(kvp.Key);
+                }
+                else
+                {
+                    _aggroTable[kvp.Key] = newAggro;
+                }
+            }
+
+            // 어그로가 0 이하인 항목 제거
+            foreach (var key in keysToRemove)
+            {
+                _aggroTable.Remove(key);
+            }
+        }
+
+        private void ConsiderTargetSwitch(ulong attackerId)
+        {
+            // 현재 ChasePlayer 또는 Attack 상태가 아니면 무시
+            if (_currentState.Value != EnemyAIState.ChasePlayer &&
+                _currentState.Value != EnemyAIState.Attack)
+            {
+                return;
+            }
+
+            // 현재 타겟의 어그로 확인
+            ulong currentTargetId = _targetPlayerId.Value;
+            float currentAggro = 0f;
+            if (currentTargetId != 0 && _aggroTable.TryGetValue(currentTargetId, out float currAgg))
+            {
+                currentAggro = currAgg;
+            }
+
+            // 공격자의 어그로 확인
+            if (!_aggroTable.TryGetValue(attackerId, out float attackerAggro))
+            {
+                return;
+            }
+
+            // 어그로 차이가 임계값 이상이면 타겟 전환
+            if (attackerAggro >= currentAggro + aggroSwitchThreshold)
+            {
+                // 공격자를 NetworkObject로 찾기
+                if (NetworkManager.Singleton.SpawnManager.SpawnedObjects.TryGetValue(attackerId, out NetworkObject attackerObj))
+                {
+                    GameObject attacker = attackerObj.gameObject;
+
+                    // 유효한 타겟인지 확인 (사망하지 않음, 거리 내에 있음)
+                    IDamageable damageable = attacker.GetComponentInParent<IDamageable>();
+                    if (damageable != null && !damageable.IsDead())
+                    {
+                        float distance = GetDistanceToTarget(attacker);
+                        if (distance <= maxChaseDistance)
+                        {
+                            SetTargetPlayer(attacker);
+
+                            // 캠프에 알림
+                            if (creepCamp != null)
+                            {
+                                creepCamp.AlertAllCreeps(attacker, this);
+                            }
+
+                            if (_currentState.Value != EnemyAIState.ChasePlayer)
+                            {
+                                TransitionToState(EnemyAIState.ChasePlayer);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        private void ReevaluateTarget()
+        {
+            if (!enableAggroSystem) return;
+            if (Time.time - _lastTargetReevaluateTime < targetReevaluateInterval) return;
+            _lastTargetReevaluateTime = Time.time;
+
+            // 어그로 감쇠
+            DecayAggro();
+
+            // 현재 추적 중이 아니면 감지 로직에 맡김
+            if (_currentState.Value != EnemyAIState.ChasePlayer &&
+                _currentState.Value != EnemyAIState.Attack)
+            {
+                return;
+            }
+
+            GameObject currentTarget = GetTargetPlayer();
+            if (currentTarget == null) return;
+
+            // 최고 어그로 타겟 찾기
+            ulong highestAggroId = 0;
+            float highestAggro = 0f;
+
+            foreach (var kvp in _aggroTable)
+            {
+                if (kvp.Value > highestAggro)
+                {
+                    // 유효한 타겟인지 확인
+                    if (NetworkManager.Singleton.SpawnManager.SpawnedObjects.TryGetValue(kvp.Key, out NetworkObject netObj))
+                    {
+                        IDamageable damageable = netObj.GetComponentInParent<IDamageable>();
+                        if (damageable != null && !damageable.IsDead())
+                        {
+                            float distance = GetDistanceToTarget(netObj.gameObject);
+                            if (distance <= maxChaseDistance)
+                            {
+                                highestAggroId = kvp.Key;
+                                highestAggro = kvp.Value;
+                            }
+                        }
+                    }
+                }
+            }
+
+            // 현재 타겟이 최고 어그로가 아니면 전환 고려
+            ulong currentTargetNetId = 0;
+            var currentNetObj = currentTarget.GetComponentInParent<NetworkObject>();
+            if (currentNetObj != null)
+            {
+                currentTargetNetId = currentNetObj.NetworkObjectId;
+            }
+
+            if (highestAggroId != 0 && highestAggroId != currentTargetNetId)
+            {
+                float currentAggro = 0f;
+                _aggroTable.TryGetValue(currentTargetNetId, out currentAggro);
+
+                if (highestAggro >= currentAggro + aggroSwitchThreshold)
+                {
+                    if (NetworkManager.Singleton.SpawnManager.SpawnedObjects.TryGetValue(highestAggroId, out NetworkObject newTargetObj))
+                    {
+                        SetTargetPlayer(newTargetObj.gameObject);
+                    }
+                }
+            }
+
+            // 거리 기반 타겟 전환 (어그로가 비슷하면 더 가까운 타겟으로)
+            ConsiderDistanceBasedSwitch();
+        }
+
+        private void ConsiderDistanceBasedSwitch()
+        {
+            GameObject currentTarget = GetTargetPlayer();
+            if (currentTarget == null) return;
+
+            float currentDistance = GetDistanceToTarget(currentTarget);
+
+            // 주변 플레이어 검색
+            Collider[] colliders = Physics.OverlapSphere(transform.position, detectionRange, playerLayer);
+
+            foreach (Collider col in colliders)
+            {
+                if (col.transform.root == transform.root) continue;
+                if (col.gameObject == currentTarget) continue;
+
+                IDamageable damageable = col.GetComponentInParent<IDamageable>();
+                if (damageable == null || damageable.IsDead()) continue;
+
+                ITeamMember teamMember = col.GetComponentInParent<ITeamMember>();
+                if (teamMember != null && teamMember.GetTeam() != TeamType.Player) continue;
+
+                float newDistance = GetDistanceToTarget(col.gameObject);
+
+                // 현재 타겟보다 충분히 가까우면 전환 고려
+                if (currentDistance - newDistance >= distanceSwitchThreshold)
+                {
+                    // 현재 타겟의 어그로 가져오기
+                    ulong currentTargetId = _targetPlayerId.Value;
+                    float currentAggro = 0f;
+                    if (currentTargetId != 0)
+                    {
+                        _aggroTable.TryGetValue(currentTargetId, out currentAggro);
+                    }
+
+                    // 새 타겟이 어그로가 비슷하거나 높으면 전환
+                    var newNetObj = col.GetComponentInParent<NetworkObject>();
+                    if (newNetObj != null)
+                    {
+                        float newAggro = 0f;
+                        _aggroTable.TryGetValue(newNetObj.NetworkObjectId, out newAggro);
+
+                        // 거리 우선: 어그로가 크게 차이나지 않으면 더 가까운 타겟으로
+                        if (newAggro >= currentAggro - aggroSwitchThreshold * 0.5f)
+                        {
+                            SetTargetPlayer(col.gameObject);
+
+                            if (creepCamp != null)
+                            {
+                                creepCamp.AlertAllCreeps(col.gameObject, this);
+                            }
+
+                            return; // 한 번에 하나만 전환
+                        }
+                    }
+                }
+            }
+        }
+
+        #endregion
+
         #region Utilities & Distance
 
         private float GetDistanceToTarget(GameObject target)
@@ -818,7 +1109,19 @@ namespace Northbound
                 distanceInfo = $"\nDistToCore: {distToCore:F1} (Range: {attackRange})";
             }
 
-            string fullInfo = $"{gameObject.name}\n{stateInfo}\n{targetInfo}{attackInfo}{distanceInfo}";
+            // 어그로 정보 표시
+            string aggroInfo = "";
+            if (enableAggroSystem && _aggroTable.Count > 0)
+            {
+                float currentAggro = 0f;
+                if (_targetPlayerId.Value != 0 && _aggroTable.TryGetValue(_targetPlayerId.Value, out float agg))
+                {
+                    currentAggro = agg;
+                }
+                aggroInfo = $"\nAggro: {currentAggro:F0} (Targets: {_aggroTable.Count})";
+            }
+
+            string fullInfo = $"{gameObject.name}\n{stateInfo}\n{targetInfo}{attackInfo}{distanceInfo}{aggroInfo}";
 
             UnityEditor.Handles.Label(
                 transform.position + Vector3.up * 3f,

Assets/Scripts/EnemyUnit.cs

@@ -41,6 +41,11 @@ namespace Northbound
         /// </summary>
         public event System.Action<ulong> OnDeath;
 
+        /// <summary>
+        /// 데미지를 받았을 때 발생하는 이벤트 (매개변수: attackerId, damage)
+        /// </summary>
+        public event System.Action<ulong, int> OnDamageTaken;
+
         private UnitHealthBar _healthBar;
 
         public override void OnNetworkSpawn()
@@ -120,6 +125,9 @@ namespace Northbound
             // 데미지 이펙트
             ShowDamageEffectClientRpc();
 
+            // 데미지 받음 이벤트 발생 (AI 어그로 시스템용)
+            OnDamageTaken?.Invoke(attackerId, actualDamage);
+
             // 체력이 0이 되면 파괴
             if (_currentHealth.Value <= 0)
             {