/// <summary>
/// Constructor
/// </summary>
/// <param name="component"> the subscriber </param>
/// <exception cref="ArgumentException"> Enum provided to Initialize must have at least 1 visible definition </exception>
public StateMachine(MonoBehaviour component)
{
//to track what is running state
_stateStream.Subscribe(st =>
{
//StateStream.OnNext(st.GetState());
if (Changed != null)
{
Changed.Invoke(st.GetState());
}
if (_tempStates.Count < 1)
{
_currentState = st;
_tempStates.Enqueue(_currentState);
}
else
{
_lastState = _tempStates.Dequeue();
_currentState = st;
_tempStates.Enqueue(_currentState);
}
}).AddTo(component);
_component = component;
//Define States
var values = Enum.GetValues(typeof(T));
if (values.Length < 1)
{
throw new ArgumentException("Enum provided to Initialize must have at least 1 visible definition");
}
_stateLookup = new Dictionary <object, StateMapping>();
for (int i = 0; i < values.Length; i++)
{
var mapping = new StateMapping((Enum)values.GetValue(i), _stateStream);
_stateLookup.Add(mapping.GetState(), mapping);
}
AddSubscriber_Internal(component);
_initNotifyer.OnNext(Unit.Default);
_initNotifyer.OnCompleted();
}
private void ChangeStateInternal(T newState, StateTransition transition, float enterDuration, float exitDuration)
{
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 != null && _currentState == nextState)
{
return;
}
//if (_StateInQeue != null && _StateInQeue == nextState) return;
if (transition.Equals(StateTransition.Safe))
{
if (_currentState == null) //for initial run
{
_queHistory.Add(nextState.CreateNewRoutine(nextState.HasEnterRoutine ? enterDuration : 0f, true));
_StateInQeue = nextState;
return;
}
if (_currentState.ExitInQue) //if current one has exit routine waiting
{
_queHistory.Add(_currentState.CreateNewRoutine(_currentState.HasExitRoutine ? exitDuration : 0f, false));
_queHistory.Add(nextState.CreateNewRoutine(nextState.HasEnterRoutine ? enterDuration : 0f, true));
_StateInQeue = nextState;
}
else //already in current exit routine
{
if (!_StateInQeue.GetState().Equals(nextState.GetState())) //if next state is not in qeue
{
_queHistory.Add(nextState.CreateNewRoutine(nextState.HasEnterRoutine ? enterDuration : 0f, true));
_StateInQeue = nextState;
}
}
}
else if (transition.Equals(StateTransition.Overwrite))
{
if (_currentState == null) //for initial run
{
_queHistory.Add(nextState.CreateNewRoutine(nextState.HasEnterRoutine ? enterDuration : 0f, true));
_StateInQeue = nextState;
}
else
{
//todo test more on OnCancle.Invoke
//_StateInQeue.EnterCancel.Invoke();
_queHistory.Cancle();
_currentState.Finally.Invoke();
_queHistory.Add(nextState.CreateNewRoutine(nextState.HasEnterRoutine ? enterDuration : 0f, true));
_StateInQeue = nextState;
}
}
else //blend
{
if (_currentState == null) //for initial run
{
_queHistory.Add(nextState.CreateNewRoutine(nextState.HasEnterRoutine ? enterDuration : 0f, true));
_StateInQeue = nextState;
return;
}
if (_currentState.ExitInQue) //if current one has exit routine, waiting
{
_queHistory.AddPair(_currentState.CreateNewRoutine(_currentState.HasExitRoutine ? exitDuration : 0f, false),
nextState.CreateNewRoutine(nextState.HasEnterRoutine ? enterDuration : 0f, true));
_StateInQeue = nextState;
}
}
}