private IEnumerator ChangeToNewStateRoutine(StateMapping newState, MonoFSMStateTransitionOption transition)
{
destinationState = newState;
if (currentState != null)
{
if (currentState.HasExitRoutine)
{
exitRoutine = currentState.ExitRoutine();
if (exitRoutine != null && transition != MonoFSMStateTransitionOption.Overwrite)
{
yield return(engine.StartCoroutine(exitRoutine));
}
exitRoutine = null;
}
else
{
currentState.ExitCall();
}
currentState.Finally();
}
lastState = currentState;
currentState = destinationState;
if (currentState != null)
{
if (currentState.HasEnterRoutine)
{
enterRoutine = currentState.EnterRoutine();
if (enterRoutine != null)
{
yield return(engine.StartCoroutine(enterRoutine));
}
enterRoutine = null;
}
else
{
currentState.EnterCall();
}
if (OnFSMStateChangedEventHandler != null)
{
OnFSMStateChangedEventHandler((T)currentState.state);
}
}
isInTransition = false;
}
public void ChangeState(T newState, MonoFSMStateTransitionOption transition)
{
if (stateLookup == null)
{
throw new Exception("没有配置状态机的状态，请调用Init方法进行初始化");
}
if (!stateLookup.ContainsKey(newState))
{
throw new Exception("没有定义<<" + newState.ToString() + ">>这个状态");
}
var nextState = stateLookup[newState];
if (currentState == nextState)
{
return;
}
if (queuedChange != null)
{
engine.StopCoroutine(queuedChange);
queuedChange = null;
}
switch (transition)
{
case MonoFSMStateTransitionOption.Safe:
if (isInTransition)
{
if (exitRoutine != null)
{
destinationState = nextState;
return;
}
if (enterRoutine != null)
{
queuedChange = WaitForPreviousTransition(nextState);
engine.StartCoroutine(queuedChange);
return;
}
}
break;
case MonoFSMStateTransitionOption.Overwrite:
if (currentTransition != null)
{
engine.StopCoroutine(currentTransition);
}
if (exitRoutine != null)
{
engine.StopCoroutine(exitRoutine);
}
if (enterRoutine != null)
{
engine.StopCoroutine(enterRoutine);
}
break;
}
if ((currentState != null && currentState.HasExitRoutine) || nextState.HasEnterRoutine)
{
isInTransition = true;
currentTransition = ChangeToNewStateRoutine(nextState, transition);
engine.StartCoroutine(currentTransition);
}
else
{
if (currentState != null)
{
currentState.ExitCall();
currentState.Finally();
}
lastState = currentState;
currentState = nextState;
if (currentState != null)
{
currentState.EnterCall();
if (OnFSMStateChangedEventHandler != null)
{
OnFSMStateChangedEventHandler((T)currentState.state);
}
}
isInTransition = false;
}
}