/// <summary>
/// 添加切换的状态.
/// </summary>
/// <param name="trans">Trans.</param>
/// <param name="stateID">State I.</param>
public void AddTransition(EBehaviourTransition trans, EBehaviourStateID stateID)
{
// 不要传空的进来哦.
if (trans == EBehaviourTransition.None)
{
Debug.LogError("FSMState ERROR: NullTransition is not allowed for a real transition");
return;
}
if (stateID == EBehaviourStateID.None)
{
Debug.LogError("FSMState ERROR: NullStateID is not allowed for a real ID");
return;
}
// Since this is a Deterministic FSM,
// check if the current transition was already inside the map
if (TransitionMap.ContainsKey(trans))
{
Debug.LogError("FSMState ERROR: State " + stateID.ToString() + " already has transition " + trans.ToString() +
"Impossible to assign to another state");
return;
}
TransitionMap.Add(trans, stateID);
}
/// <summary>
/// This method places new _States inside the FSM,
/// or prints an ERROR message if the state was already inside the List.
/// First state added is also the initial state.
/// </summary>
public void AddState(BehaviourState s)
{
if (s == null)
{
Debug.LogError("FSM ERROR: Null reference is not allowed");
}
// First State inserted is also the Initial state,
// the state the machine is in when the simulation begins
if (_States.Count == 0)
{
_States.Add(s);
_CurState = s;
_CurStateID = s.ID;
_CurState.OnEnter();
return;
}
// Add the state to the List if it's not inside it
foreach (BehaviourState state in _States)
{
if (state.ID == s.ID)
{
Debug.LogError("FSM ERROR: Impossible to add state " + s.ID.ToString() +
" because state has already been added");
return;
}
}
_States.Add(s);
}
public bool CanTransition(EBehaviourTransition trans)
{
// Check for NullTransition before changing the current state
if (trans == EBehaviourTransition.None)
{
Debug.LogError("FSM ERROR: NullTransition is not allowed for a real transition");
return(false);
}
EBehaviourStateID id = _CurState.GetOutputState(trans);
if (id == EBehaviourStateID.None)
{
// Debug.LogWarning("FSM ERROR: State " + _CurStateID.ToString() + " does not have a target state " +
// " for transition " + trans.ToString());
return(false);
}
return(true);
}
/// <summary>
/// 执行转换，外部调用关键方法。
/// </summary>
/// <param name="trans">Trans.</param>
public void PerformTransition(EBehaviourTransition trans, object param = null)
{
if (!CanTransition(trans))
{
return;
}
_CurStateID = _CurState.GetOutputState(trans);
foreach (BehaviourState state in _States)
{
if (state.ID == _CurStateID)
{
_CurState.OnExit();
_CurState = state;
_CurState.OnEnterBefore();
_CurState.OnEnter(param);
break;
}
}
}
/// <summary>
/// This method delete a state from the FSM List if it exists,
/// or prints an ERROR message if the state was not on the List.
/// </summary>
public void DeleteState(EBehaviourStateID id)
{
// Check for NullState before deleting
if (id == EBehaviourStateID.None)
{
Debug.LogError("FSM ERROR: NullStateID is not allowed for a real state");
return;
}
// Search the List and delete the state if it's inside it
foreach (BehaviourState state in _States)
{
if (state.ID == id)
{
_States.Remove(state);
return;
}
}
Debug.LogError("FSM ERROR: Impossible to delete state " + id.ToString() +
". It was not on the list of states");
}
/// <summary>
/// 查找指定的状态.
/// </summary>
/// <returns>The state.</returns>
/// <param name="stateID">State I.</param>
public BehaviourState FindState(EBehaviourStateID stateID)
{
return(_States.Find((state) => {
return state.ID == stateID;
}));
}
