多轮审查和修复

Assets/Scripts/Enemies/AI/BD_Patrol.cs

@@ -2,16 +2,25 @@
 using Opsive.BehaviorDesigner.Runtime.Tasks;
 using Opsive.BehaviorDesigner.Runtime.Tasks.Actions;
 using BaseGames.Enemies;
+using UnityEngine;
 
 namespace BaseGames.Enemies.AI
 {
     /// <summary>
-    /// BD Action：敌人巡逻行为（Phase 1 简单实现）。
-    /// 挂在 BT 节点上，持续令敌人向当前朝向移动。
+    /// BD Action：敌人巡逻行为。
+    /// 持续令敌人向当前朝向移动，遇墙/边缘时自动转向。
     /// </summary>
     public class BD_Patrol : Action
     {
+        [Tooltip("检测地面边缘的向下射线长度")]
+        public float edgeCheckLength = 1.2f;
+        [Tooltip("检测障碍物的水平射线长度")]
+        public float wallCheckLength = 0.4f;
+        [Tooltip("地面/墙壁 LayerMask")]
+        public LayerMask groundLayer;
+
         private EnemyBase _enemy;
+        private float     _dir = 1f;
 
         public override void OnStart()
         {
@@ -21,8 +30,11 @@ namespace BaseGames.Enemies.AI
         public override TaskStatus OnUpdate()
         {
             if (_enemy == null) return TaskStatus.Failure;
-            // Phase 1：固定向右巡逻；Phase 2 改为往返检测
-            _enemy.MoveInDirection(1f);
+
+            if (ShouldFlip())
+                _dir = -_dir;
+
+            _enemy.MoveInDirection(_dir);
             return TaskStatus.Running;
         }
 
@@ -30,6 +42,23 @@ namespace BaseGames.Enemies.AI
         {
             _enemy?.StopMovement();
         }
+
+        private bool ShouldFlip()
+        {
+            Transform t = _enemy.transform;
+            Vector2 pos = t.position;
+
+            // 前方边缘检测：在脚前方向下射线，若无地面则转向
+            Vector2 edgeOrigin = pos + Vector2.right * (_dir * 0.3f) + Vector2.down * 0.1f;
+            bool hasGround = Physics2D.Raycast(edgeOrigin, Vector2.down, edgeCheckLength, groundLayer);
+            if (!hasGround) return true;
+
+            // 前方障碍检测：水平射线，若撞墙则转向
+            bool hitWall = Physics2D.Raycast(pos, Vector2.right * _dir, wallCheckLength, groundLayer);
+            if (hitWall) return true;
+
+            return false;
+        }
     }
 }
 #endif