/// <summary>
/// 增加映射对
/// </summary>
/// <param name="transitionID">转换条件ID</param>
/// <param name="stateID">下一个转台ID</param>
public void AddTransition(FSMTransitionID transitionID, FSMStateID stateID)
{
// 判空
if (transitionID == FSMTransitionID.NullTransition)
{
Debug.LogError("FSMState ERROR: NullTransition is not allowed for a real transition");
return;
}
if (stateID == FSMStateID.NullState)
{
Debug.LogError("FSMState ERROR: NullStateID is not allowed for a real ID");
return;
}
// 已经存在
if (map.ContainsKey(transitionID))
{
Debug.LogError("FSMState ERROR: State " + this.stateID.ToString() + " already has transition " + transitionID.ToString() +
"Impossible to assign to another state");
return;
}
map.Add(transitionID, stateID);
AddTransitionObject(transitionID);
}
/// <summary>
/// 根据转换条件获得下一个状态ID
/// </summary>
/// <param name="transitionID"></param>
/// <returns>不存在转换映射将返回NUllStateID</returns>
public FSMStateID GetOutputState(FSMTransitionID transitionID)
{
// 存在转换映射
if (map.ContainsKey(transitionID))
{
return(map[transitionID]);
}
return(FSMStateID.NullState);
}
/// <summary>
/// 添加转换条件对象
/// </summary>
/// <param name="transitionID"></param>
private void AddTransitionObject(FSMTransitionID transitionID)
{
//反射，命名规则：所有Transition都以对应的TransitionID+Transition命名
Type type = Type.GetType("Mystery.FSM." + transitionID + "Transition");
if (type != null)
{
System.Object[] param = new System.Object[1] {
nPC
};
FSMTransition transitionObj = Activator.CreateInstance(type, param) as FSMTransition;
transitions.Add(transitionObj);
}
}
/// <summary>
/// 配置，添加状态和转换
/// </summary>
public void ConfigFSM(string filename)
{
//反射
System.Object[] param = new System.Object[1] {
nPC
};
var map = FSMConfigurationReader.ReadCongfig(filename);
List <FSMStateID> anyStateNextStates = new List <FSMStateID>();
List <FSMTransitionID> anyStateTrans = new List <FSMTransitionID>();
int anyTransCount = 0;
foreach (string stateID in map.Keys)
{
if (stateID == "Any")
{
// 特殊处理
// 每个状态都要添加这个"Any"下的所有转换（需要写在配置表开头），同样不需要状态实体
// 同时可能需要添加NPC的状态变量如hp
foreach (string transitionID in map[stateID].Keys)
{
FSMTransitionID t = (FSMTransitionID)Enum.Parse(typeof(FSMTransitionID), transitionID);
FSMStateID s = (FSMStateID)Enum.Parse(typeof(FSMStateID), map[stateID][transitionID]);
anyStateNextStates.Add(s);
anyStateTrans.Add(t);
}
anyTransCount = anyStateTrans.Count;
continue;
}
Type type = Type.GetType(curNamespaceDot + stateID + "State");
FSMState state = Activator.CreateInstance(type, param) as FSMState;
AddState(state);
// 先添加anystate的转换
for (int i = 0; i < anyTransCount; i++)
{
state.AddTransition(anyStateTrans[i], anyStateNextStates[i]);
}
// 再添加这个状态的
foreach (string transitionID in map[stateID].Keys)
{
FSMTransitionID t = (FSMTransitionID)Enum.Parse(typeof(FSMTransitionID), transitionID);
FSMStateID s = (FSMStateID)Enum.Parse(typeof(FSMStateID), map[stateID][transitionID]);
state.AddTransition(t, s);
}
}
}
/// <summary>
/// 删除映射对
/// </summary>
public void RemoveTransition(FSMTransitionID transitionID)
{
// 判空
if (transitionID == FSMTransitionID.NullTransition)
{
Debug.LogError("FSMState ERROR: NullTransition is not allowed");
return;
}
// 确实存在
if (map.ContainsKey(transitionID))
{
map.Remove(transitionID);
RemoveTransitionObject(transitionID);
return;
}
Debug.LogError("FSMState ERROR: Transition " + transitionID.ToString() + " passed to " + stateID.ToString() +
" was not on the state's transition list");
}
/// <summary>
/// 执行状态转换，当前+条件->下一个
/// </summary>
public void PerformTransition(FSMTransitionID trans)
{
// 判空
if (trans == FSMTransitionID.NullTransition)
{
Debug.LogError("FSM ERROR: NullTransition is not allowed for a real transition");
return;
}
// 尝试获取下一个状态ID
FSMStateID nextStateID = currentState.GetOutputState(trans);
if (nextStateID == FSMStateID.NullState)
{
Debug.LogError("FSM ERROR: State " + currentStateID.ToString() + " does not have a target state " +
" for transition " + trans.ToString());
return;
}
// 获取下一个状态
FSMState nextState = null;
if (nextStateID == FSMStateID.Default)
{
nextState = defaultState;
}
else
{
nextState = states.Find(s => s.StateID == nextStateID);
}
// 更新状态
currentState.DoBeforeLeaving();
if (!currentState.isFinished)
{
SavePreviousState();
}
currentState = nextState;
currentStateID = nextState.StateID;
currentState.DoBeforeEntering();
}
/// <summary>
/// 删除转换条件对象
/// </summary>
/// <param name="transitionID"></param>
private void RemoveTransitionObject(FSMTransitionID transitionID)
{
transitions.RemoveAll(t => t.TransitionID == transitionID);
}
/// <summary>
/// 执行转换，fSMSystem.PerformTransition
/// </summary>
/// <param name="transitionID"></param>
public void PerformTransition(FSMTransitionID transitionID)
{
fSMSystem.PerformTransition(transitionID);
}
