feat(enemy): EnemyLocomotion 巡逻策略 Pace(踱步) + Waypoints(路点 loop/ping-pong)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Assets/_Game/Scripts/Enemies/Navigation/EnemyLocomotion.cs

@@ -11,15 +11,23 @@ namespace BaseGames.Enemies
     [DisallowMultipleComponent]
     public sealed class EnemyLocomotion : MonoBehaviour, IEnemyLocomotion
     {
-        [Header("巡逻策略（P6 实现 Pace/Waypoints；当前仅 Wander）")]
+        [Header("巡逻策略（Wander/Pace/Waypoints）")]
         [SerializeField] private PatrolStrategy _patrolStrategy = PatrolStrategy.Wander;
 
+        [Header("Waypoints 策略参数")]
+        [SerializeField] private Transform[] _waypoints;
+        [SerializeField] private bool _pingPong;
+
         private EnemyBase _enemy;
         private LocomotionMode _mode = LocomotionMode.Idle;
         private Transform _approachTarget;
         private Vector2 _facePoint;
         private LocomotionMode _gaitMode;
         private bool _gaitInit;
+        private float _paceDir = 1f;
+        private int _wpIndex = -1;
+        private int _wpDir = 1;
+        private bool _warnedNoWaypoints;
 
         public LocomotionMode CurrentMode => _mode;
         public bool IsMoving => _enemy != null && _enemy.Nav != null && _enemy.Nav.IsMoving;
@@ -96,17 +104,48 @@ namespace BaseGames.Enemies
 
         private void TickPatrol()
         {
-            var nav = _enemy.Nav;
-            if (nav == null) return;
             switch (_patrolStrategy)
             {
                 case PatrolStrategy.Wander:
-                    if (!nav.IsMoving) nav.WalkToRandom();
+                    if (_enemy.Nav != null && !_enemy.Nav.IsMoving) _enemy.Nav.WalkToRandom();
                     break;
-                // Pace / Waypoints：P6 实现
-                default:
-                    if (!nav.IsMoving) nav.WalkToRandom();
+
+                case PatrolStrategy.Pace: // 撞墙/悬崖翻向的来回踱步（速度驱动，不依赖 nav）
+                    var mv = _enemy.Movement;
+                    if (mv != null && (mv.IsWallAhead || mv.IsLedgeAhead)) _paceDir = -_paceDir;
+                    _enemy.MoveInDirection(_paceDir);
                     break;
+
+                case PatrolStrategy.Waypoints: // 按序（loop 或 ping-pong）巡逻路点
+                    if (_waypoints == null || _waypoints.Length == 0)
+                    {
+                        if (!_warnedNoWaypoints)
+                        {
+                            Debug.LogWarning("[EnemyLocomotion] PatrolStrategy=Waypoints 但未配置 _waypoints，无法巡逻。", this);
+                            _warnedNoWaypoints = true;
+                        }
+                        break;
+                    }
+                    if (_enemy.Nav != null && !_enemy.Nav.IsMoving)
+                    {
+                        AdvanceWaypoint();
+                        _enemy.MoveTo(_waypoints[_wpIndex].position);
+                    }
+                    break;
+            }
+        }
+
+        private void AdvanceWaypoint()
+        {
+            if (_pingPong)
+            {
+                int next = _wpIndex + _wpDir;
+                if (next < 0 || next >= _waypoints.Length) { _wpDir = -_wpDir; next = _wpIndex + _wpDir; }
+                _wpIndex = Mathf.Clamp(next, 0, _waypoints.Length - 1);
+            }
+            else
+            {
+                _wpIndex = (_wpIndex + 1) % _waypoints.Length;
             }
         }
     }