public void UpdateMachine(GameTime gameTime)
{
//don't do anything if you have no states
if (states.Count == 0)
return;
//don't do anything if there's no current
//state, and no default state
if (currentState == null)
currentState = defaultState;
if (currentState == null)
return;
//check for transitions, and then update
FSMStateEnum oldStateID = currentState.GetID();
goalStateID = currentState.CheckTransitions();
//switch if there was a transition
if (goalStateID != oldStateID)
{
if (TransitionState(goalStateID))
{
currentState.Exit();
currentState = goalState;
currentState.Enter();
}
}
currentState.Update(gameTime);
}
public void Reset()
{
if (currentState != null)
currentState.Exit();
currentState = defaultState;
//init all the states
for (int i = 0; i < states.Count; i++)
states[i].Init();
//and now enter the m_defaultState, if any
if (currentState != null)
currentState.Enter();
}
public void SetDefaultState(FSMState state)
{
defaultState = state;
}
public void AddState(FSMState newState)
{
states.Add(newState);
}
bool TransitionState(FSMStateEnum goal)
{
//don't do anything if you have no states
if (states.Count == 0)
return false;
//determine if we have state of type 'goal'
//in the list, and switch to it, otherwise, quit out
for (int i = 0; i < states.Count; i++)
{
if (states[i].GetID() == goal)
{
goalState = states[i];
return true;
}
}
return false;
}
public void SetDefaultState(FSMState state)
{
defaultState = state;
}
public void AddState(FSMState newState)
{
states.Add(newState);
}