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Packages/com.xfkj.xffsm@357f537fea/Runtime/FSMTransition.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+
+namespace XFFSM
+{
+    /// <summary>
+    /// 状态之间的过渡
+    /// </summary>
+    public class FSMTransition
+    {
+        #region 字段
+        private FSMTransitionData data;
+        private RuntimeFSMControllerInstance controller;
+        private FSMStateNode toState;
+         
+        public List<FSMConditionGroup> condition_groups;
+
+        #endregion
+
+        #region 属性
+
+        /// <summary>
+        /// 过渡数据
+        /// </summary>
+        public FSMTransitionData Data => data;
+
+        /// <summary>
+        /// 过渡目标状态
+        /// </summary>
+        public FSMStateNode ToState => toState;
+
+        // 条件是否已经满足
+        internal bool IsMeet
+        {
+            get
+            {
+                // 如果过渡没有条件认为条件满足,可以切换状态
+                //if (conditions.Count == 0) return true;
+
+                // 判断是不是所有的条件都满足了 
+                //foreach (var item in conditions)
+                //{
+                //    if (item.state == ConditionState.NotMeet) return false;
+                //}
+
+                if(!ConditionGroupMeet())
+                    return false;
+                 
+                if (toState == null) { 
+                    Debug.LogError("查询目标状态失败!"); 
+                    return false;
+                }
+
+                FSMStateNodeData from = controller.RuntimeFSMController.GetStateNodeData(data.fromStateName);
+                string parent = from.Parent;
+                FSMStateNode currentState = controller.GetCurrentState(parent);
+
+                if (currentState == null) return false;
+
+                if (!data.fromStateName.Equals(currentState.data.name))
+                { 
+                    // AnyState 
+                    if (!from.IsAnyState) return false;
+
+                    // 判断当前的状态 跟 目标状态是不是一个 
+                    if (currentState.data.name.Equals(data.toStateName)) return false;
+                }
+                return true;
+            }
+
+        }
+
+        #endregion
+
+        #region 方法
+
+        internal FSMTransition(RuntimeFSMControllerInstance controller, FSMTransitionData data) {
+            this.data = data;
+            this.controller = controller;
+
+            //this.conditions = new List<FSMCondition>();
+
+            this.condition_groups = new List<FSMConditionGroup>();
+
+            FSMConditionGroup group = new FSMConditionGroup(controller, this.data.conditions,data);
+            group.onConditionMeet += this.CheckCondition;
+            condition_groups.Add(group);
+
+            foreach (var item in data.group_conditions)
+            {
+                FSMConditionGroup condition_group = new FSMConditionGroup(controller, item.conditions,data);
+                condition_group.onConditionMeet += this.CheckCondition;
+                condition_groups.Add(condition_group);
+            }
+  
+            if ( controller.states.ContainsKey(data.toStateName) ) {
+                toState = controller.states[data.toStateName];
+            }
+
+        }
+         
+        // 检测条件是否满足
+        private void CheckCondition()
+        {
+            CheckConditionAndSwitch();
+        }
+
+        // 检测条件是不是都满足了
+        internal bool CheckConditionAndSwitch() 
+        {
+            bool isMeet = IsMeet;
+            if (isMeet)
+            {
+                // reset trigger
+                ResetTrigger();
+                // 切换状态 
+                controller.SwitchState(toState,this);
+            }
+            return isMeet;
+        }
+
+        private void ResetTrigger() 
+        {
+            foreach (var item in condition_groups)
+            {
+                item.ResetTrigger();
+            }
+        }
+
+        private bool ConditionGroupMeet() 
+        { 
+            foreach (var item in condition_groups)
+            {
+                if (item.IsMeet) 
+                    return true; 
+            } 
+            return false;
+        }
+
+        #endregion
+
+    }
+
+}
+