private IEnumerator ChangeToNewStateRoutine(StateMapping newState, StateTransition transtiion)
{
_destinationState = newState;
if (_currentState != null)
{
if (_currentState.hasExitRoutine)
{
_exitRoutine = _currentState.ExitRoutine();
if (_exitRoutine != null && transtiion != StateTransition.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 (Changed != null)
{
Changed(_currentState.State);
}
}
_isInTransition = false;
}
public void ChangeState(Enum newState, StateTransition transition = StateTransition.Safe)
{
if (stateLookup == null)
{
throw new Exception("States have not been configured, please call initialized before trying to set state");
}
if (!stateLookup.ContainsKey(newState))
{
throw new Exception("No state with the name " + newState.ToString() + " can be found. Please make sure you are called the correct type the statemachine was initialized with");
}
var nextState = stateLookup[newState];
// Uncomment this to block loop transitions
// if (currentState == nextState) return;
// Cancel any queued changes.
if (queuedChange != null)
{
StopCoroutine(queuedChange);
queuedChange = null;
}
switch (transition)
{
// case StateMachineTransition.Blend:
// Do nothing - allows the state transitions to overlap each other. This is a dumb idea, as previous state might trigger new changes.
// A better way would be to start the two couroutines at the same time. IE don't wait for exit before starting start.
// How does this work in terms of overwrite?
// Is there a way to make this safe, I don't think so?
// break;
case StateTransition.Safe:
if (isInTransition)
{
if (exitRoutine != null) // We are already exiting current state on our way to our previous target state
{
// Overwrite with our new target
destinationState = nextState;
return;
}
if (enterRoutine != null) // We are already entering our previous target state. Need to wait for that to finish and call the exit routine.
{
// Damn, I need to test this hard
queuedChange = WaitForPreviousTransition(nextState);
StartCoroutine(queuedChange);
return;
}
}
break;
case StateTransition.Overwrite:
if (currentTransition != null)
{
StopCoroutine(currentTransition);
}
if (exitRoutine != null)
{
StopCoroutine(exitRoutine);
}
if (enterRoutine != null)
{
StopCoroutine(enterRoutine);
}
if (currentState != null)
{
currentState.Finally();
}
currentState = null; // We need to set current state to null so that we don't trigger it's exit routine
break;
}
isInTransition = true;
currentTransition = ChangeToNewStateRoutine(nextState);
StartCoroutine(currentTransition);
}
public void ChangeState(T newState, StateTransition transition)
{
if (stateLookup == null)
{
throw new Exception("States have not been configured, please call initialized before trying to set state");
}
if (!stateLookup.ContainsKey(newState))
{
throw new Exception("No state with the name " + newState.ToString() + " can be found. Please make sure you are called the correct type the statemachine was initialized with");
}
var nextState = stateLookup[newState];
if (currentState == nextState)
{
return;
}
//Cancel any queued changes.
if (queuedChange != null)
{
engine.StopCoroutine(queuedChange);
queuedChange = null;
}
switch (transition)
{
//case StateMachineTransition.Blend:
//Do nothing - allows the state transitions to overlap each other. This is a dumb idea, as previous state might trigger new changes.
//A better way would be to start the two couroutines at the same time. IE don't wait for exit before starting start.
//How does this work in terms of overwrite?
//Is there a way to make this safe, I don't think so?
//break;
case StateTransition.Safe:
if (isInTransition)
{
if (exitRoutine != null) //We are already exiting current state on our way to our previous target state
{
//Overwrite with our new target
destinationState = nextState;
return;
}
if (enterRoutine != null) //We are already entering our previous target state. Need to wait for that to finish and call the exit routine.
{
//Damn, I need to test this hard
queuedChange = WaitForPreviousTransition(nextState);
engine.StartCoroutine(queuedChange);
return;
}
}
break;
case StateTransition.Overwrite:
if (currentTransition != null)
{
engine.StopCoroutine(currentTransition);
}
if (exitRoutine != null)
{
engine.StopCoroutine(exitRoutine);
}
if (enterRoutine != null)
{
engine.StopCoroutine(enterRoutine);
}
//Note: if we are currently in an EnterRoutine and Exit is also a routine, this will be skipped in ChangeToNewStateRoutine()
break;
}
if ((currentState != null && currentState.hasExitRoutine) || nextState.hasEnterRoutine)
{
isInTransition = true;
currentTransition = ChangeToNewStateRoutine(nextState, transition);
engine.StartCoroutine(currentTransition);
}
else //Same frame transition, no coroutines are present
{
if (currentState != null)
{
currentState.ExitCall();
currentState.Finally();
}
lastState = currentState;
currentState = nextState;
if (currentState != null)
{
currentState.EnterCall();
if (Changed != null)
{
Changed((T)currentState.state);
}
}
isInTransition = false;
}
}