public SKStateMachine(T context, SKState <T> initialState)
{
this._context = context;
// setup our initial state
AddState(initialState);
_currentState = initialState;
_currentState.Begin();
}
/// <summary>
/// changes the current state
/// </summary>
public R ChangeState <R>() where R : SKState <T>
{
// avoid changing to the same state
var newType = typeof(R);
if (_currentState.GetType() == newType)
{
return(_currentState as R);
}
// only call end if we have a currentState
if (_currentState != null)
{
_currentState.End();
}
#if UNITY_EDITOR
// do a sanity check while in the editor to ensure we have the given state in our state list
if (!_states.ContainsKey(newType))
{
var error = GetType() + ": state " + newType + " does not exist. Did you forget to add it by calling AddState?";
Debug.LogError(error);
throw new Exception(error);
}
#endif
// swap states and call begin
previousState = _currentState;
_currentState = _states[newType];
_currentState.Begin();
elapsedTimeInState = 0f;
// fire the changed event if we have a listener
if (OnStateChanged != null)
{
OnStateChanged();
}
return(_currentState as R);
}
/// <summary>
/// adds the state to the machine
/// </summary>
public void AddState(SKState <T> state)
{
state.SetMachineAndContext(this, _context);
_states[state.GetType()] = state;
}
