From 225b076b62c4ea74475e3f5e77c03b4afbe9eafb Mon Sep 17 00:00:00 2001
From: dal4segno <dal4segno@gmail.com>
Date: Mon, 16 Feb 2026 09:52:49 +0900
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---
 Assets/Scripts/AutoTargetSystem.cs | 87 ++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)

diff --git a/Assets/Scripts/AutoTargetSystem.cs b/Assets/Scripts/AutoTargetSystem.cs
index 7b07161..ccd43ef 100644
--- a/Assets/Scripts/AutoTargetSystem.cs
+++ b/Assets/Scripts/AutoTargetSystem.cs
@@ -1,3 +1,4 @@
+using System.Collections;
 using Unity.Netcode;
 using UnityEngine;
 
@@ -12,6 +13,20 @@ namespace Northbound
         [Tooltip("탐지할 레이어")]
         public LayerMask targetLayer = ~0;
 
+        [Header("Beam Effect")]
+        [Tooltip("빔 효과 LineRenderer 프리팹 (없으면 자동 생성)")]
+        public LineRenderer beamPrefab;
+        [Tooltip("빔 색상")]
+        public Color beamColor = Color.red;
+        [Tooltip("빔 시작 너비")]
+        public float beamStartWidth = 0.1f;
+        [Tooltip("빔 끝 너비")]
+        public float beamEndWidth = 0.05f;
+        [Tooltip("빔 표시 시간")]
+        public float beamDuration = 0.15f;
+        [Tooltip("빔 발사 위치 (null이면 건물 중심)")]
+        public Transform firePoint;
+
         [Header("Debug")]
         [Tooltip("디버그 정보 표시")]
         public bool showDebugInfo = true;
@@ -19,6 +34,8 @@ namespace Northbound
         private Building _building;
         private ITeamMember _teamMember;
         private float _lastAttackTime;
+        private LineRenderer _beamRenderer;
+        private Coroutine _beamCoroutine;
 
         private void Awake()
         {
@@ -128,8 +145,15 @@ namespace Northbound
 
                 if (damageable != null)
                 {
+                    // 빔 시작점 계산
+                    Vector3 beamStart = firePoint != null ? firePoint.position : transform.position + Vector3.up * 2f;
+                    Vector3 beamEnd = closestEnemy.transform.position + Vector3.up * 1f; // 타겟 중앙
+
                     damageable.TakeDamage(attackDamage, NetworkObjectId);
                     _lastAttackTime = Time.time;
+
+                    // 모든 클라이언트에 빔 효과 표시
+                    ShowAttackBeamClientRpc(beamStart, beamEnd);
                     
                     var targetTeam = closestEnemy.GetComponent<ITeamMember>() ?? 
                                    closestEnemy.GetComponentInParent<ITeamMember>() ?? 
@@ -148,6 +172,69 @@ namespace Northbound
             }
         }
 
+        #region Beam Effect
+
+        /// <summary>
+        /// 빔 효과를 모든 클라이언트에 표시
+        /// </summary>
+        [ClientRpc]
+        private void ShowAttackBeamClientRpc(Vector3 start, Vector3 end)
+        {
+            if (_beamCoroutine != null)
+            {
+                StopCoroutine(_beamCoroutine);
+            }
+            _beamCoroutine = StartCoroutine(ShowBeamCoroutine(start, end));
+        }
+
+        private IEnumerator ShowBeamCoroutine(Vector3 start, Vector3 end)
+        {
+            // LineRenderer 초기화
+            if (_beamRenderer == null)
+            {
+                InitializeBeamRenderer();
+            }
+
+            if (_beamRenderer != null)
+            {
+                _beamRenderer.enabled = true;
+                _beamRenderer.SetPosition(0, start);
+                _beamRenderer.SetPosition(1, end);
+
+                yield return new WaitForSeconds(beamDuration);
+
+                _beamRenderer.enabled = false;
+            }
+        }
+
+        private void InitializeBeamRenderer()
+        {
+            if (beamPrefab != null)
+            {
+                // 프리팹 사용
+                GameObject beamObj = Instantiate(beamPrefab.gameObject, transform);
+                _beamRenderer = beamObj.GetComponent<LineRenderer>();
+            }
+            else
+            {
+                // 자동 생성
+                GameObject beamObj = new GameObject("AttackBeam");
+                beamObj.transform.SetParent(transform);
+                _beamRenderer = beamObj.AddComponent<LineRenderer>();
+
+                // 기본 설정
+                _beamRenderer.positionCount = 2;
+                _beamRenderer.startWidth = beamStartWidth;
+                _beamRenderer.endWidth = beamEndWidth;
+                _beamRenderer.material = new Material(Shader.Find("Sprites/Default"));
+                _beamRenderer.startColor = beamColor;
+                _beamRenderer.endColor = beamColor;
+                _beamRenderer.enabled = false;
+            }
+        }
+
+        #endregion
+
         private void OnDrawGizmos()
         {
             if (_building == null || _building.buildingData == null) return;