/// <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 returns the new state the FSM should be if
/// this state receives a transition and
/// </summary>
public EBehaviourStateID GetOutputState(EBehaviourTransition trans)
{
// Check if the map has this transition
if (TransitionMap.ContainsKey(trans))
{
return(TransitionMap [trans]);
}
return(EBehaviourStateID.None);
}
/// <summary>
/// 删除转换.
/// </summary>
/// <param name="trans">Trans.</param>
public void DeleteTransition(EBehaviourTransition trans)
{
// 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;
}
// Check if the pair is inside the map before deleting
if (TransitionMap.ContainsKey(trans))
{
TransitionMap.Remove(trans);
return;
}
Debug.LogError("FSMState ERROR: Transition " + trans.ToString() + " passed to " + _StateID.ToString() +
" was not on the state's transition list");
}
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;
}
}
}
