前言：一个游戏里的一个人物会存在多种状态，那么就需要有一个专门管理这些状态的类。不然会显得杂乱无章，不易于后面状态的增加或者减少。
思路：既然要方便管理，那么首先肯定得有个系统类（专门用来存放所有的状态、状态的增删等功能）；然后就是需要把所有的状态都单独写一个类（已达到修改某个状态的时候，其他状态不会受到影响）。
状态管理类：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class FSMSystem
{
private Dictionary<StateID, FSMState> states = new Dictionary<StateID, FSMState>();
private StateID currentStateID;
private FSMState currentFSMState;
public void Update(GameObject npc)
{
currentFSMState.Act(npc);
currentFSMState.Reason(npc);
}
/// <summary>
/// 添加状态
/// </summary>
/// <param name="fSMState"></param>
public void AddState(FSMState fSMState)
{
if (fSMState == null) return;
//if (currentFSMState == null)
//{
currentStateID = fSMState.ID;
currentFSMState = fSMState;
//}
if (states.ContainsKey(currentStateID)) return;
states.Add(currentStateID, currentFSMState);
}
/// <summary>
/// 删除状态
/// </summary>
/// <param name="stateID"></param>
public void DeleteState(StateID stateID)
{
if (stateID == StateID.Null) return;
if (!states.ContainsKey(stateID)) return;
states.Remove(stateID);
}
/// <summary>
/// 执行状态条件转换
/// </summary>
/// <param name="transition"></param>
public void PerformTransition(Transition transition)
{
if (transition == Transition.NullTransition) return;
StateID stateID = currentFSMState.GetStateID(transition);
if (stateID == StateID.Null) return;
if (!states.ContainsKey(stateID)) return;
FSMState fSMState = states[stateID];
currentFSMState.StateExit();
currentFSMState = fSMState;
currentStateID = fSMState.ID;
currentFSMState.StateEnter();
}
}
状态基类：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public enum Transition
{
NullTransition,
SeePlayer,//发现玩家
LostPlayer,//玩家脱离视野范围
AttackPlayer,//攻击玩家
}
public enum StateID
{
Null,
Chase,//追逐
Patrol,//巡逻
Attack,//攻击
}
public abstract class FSMState
{
protected Transition transition;
protected StateID stateID;
protected FSMSystem fSM;
public StateID ID
{
get { return stateID; }
}
protected Dictionary<Transition, StateID> dic = new Dictionary<Transition, StateID>();
public FSMState(FSMSystem fSM)
{
this.fSM = fSM;
}
/// <summary>
/// 增加状态
/// </summary>
/// <param name="transition"></param>
/// <param name="stateID"></param>
public void AddTransition(Transition transition, StateID stateID)
{
if (transition == Transition.NullTransition) return;
if (stateID == StateID.Null) return;
if (dic.ContainsKey(transition)) return;
dic.Add(transition, stateID);
}
/// <summary>
/// 删除状态
/// </summary>
/// <param name="transition"></param>
public void DeleteTransition(Transition transition)
{
if (transition == Transition.NullTransition) return;
if (!dic.ContainsKey(transition)) return;
dic.Remove(transition);
}
/// <summary>
/// 获取状态
/// </summary>
/// <param name="transition"></param>
/// <returns></returns>
public StateID GetStateID(Transition transition)
{
if (transition == Transition.NullTransition) return StateID.Null;
if (!dic.ContainsKey(transition)) return StateID.Null;
return dic[transition];
}
/// <summary>
/// 进入状态
/// </summary>
public virtual void StateEnter() { }
/// <summary>
/// 退出状态
/// </summary>
public virtual void StateExit() { }
/// <summary>
/// 状态持续中，，，
/// </summary>
/// <param name="npc"></param>
public abstract void Act(GameObject npc);
/// <summary>
/// 状态退出前，，，
/// </summary>
/// <param name="npc"></param>
publ<strong style="color:transparent">本文来源gaodai#ma#com搞@@代~&码*网/</strong>ic abstract void Reason(GameObject npc);
}
搞代码网（gaodaima.com）提供的所有资源部分来自互联网，如果有侵犯您的版权或其他权益，请说明详细缘由并提供版权或权益证明然后发送到邮箱[email protected]，我们会在看到邮件的第一时间内为您处理，或直接联系QQ：872152909。本网站采用BY-NC-SA协议进行授权
转载请注明原文链接：Unity学习之FSM有限状态机
转载请注明原文链接：Unity学习之FSM有限状态机
