public void ChangeState(StateEnum stateName)
{
Debug.Log(_currentStateEnum + " -> " + stateName);
StateData <StateEnum> current = _states[_currentStateEnum];
//CHECK IF WE ARE MID TRANSITION
if (_transitioning)
{
throw new Exception("Cannot change state while currently transitioning");
}
//LOCK STATE CHANGE
_transitioning = true;
//IF IN THIS STATE ALREADY
if (_currentStateEnum.Equals(stateName))
{
return;
}
//CHECK STATE EXISTS
if (_states.ContainsKey(stateName))
{
//CHECK NEW STATE IS LEGAL TRANSITION
if (current.allowedStateTransitions != null)
{
bool transitionAllowed = false;
for (int i = 0; i < current.allowedStateTransitions.Length; i++)
{
if (current.allowedStateTransitions[i].Equals(stateName))
{
transitionAllowed = true;
break;
}
}
//NOT A LEGAL TRANSITION
if (!transitionAllowed)
{
Debug.Log("Cannot transition from state " + _currentStateEnum.ToString() + " to state " + stateName.ToString());
return;
}
}
//SET LAST STATE AS OLD STATE IF IT WAS RESTORABLE
if (current.canBeRestored)
{
_lastStateEnum = _currentStateEnum;
}
//CHECK FOR EXIT STATE CALLBACK
if (current.OnExitStateCallback != null)
{
current.OnExitStateCallback();
}
//SET NEW STATE
_currentStateEnum = stateName;
//CHECK FOR ENTER STATE CALLBACK
if (_states[stateName].OnEnterStateCallback != null)
{
_states[stateName].OnEnterStateCallback();
}
}
else
{
Debug.Log("State: " + stateName.ToString() + " does not exist.");
}
//UNLOCK STATE CHANGE
_transitioning = false;
}
