DoBeforeLeaving() public method

This method is used to make anything necessary, as reseting variables before the FSMSystem changes to another one. It is called automatically by the FSMSystem before changing to a new state.
public DoBeforeLeaving ( ) : void
return void
FsmState Class Documentation
Exemplo n.º 1
0
    /// <summary>
    /// This method tries to change the state the FSM is in based on
    /// the current state and the transition passed. If current state
    ///  doesn't have a target state for the transition passed,
    /// an ERROR message is printed.
    /// </summary>
    public void PerformTransition(FsmTransitionId trans)
    {
        // Check for NullTransition before changing the current state
        if (trans == FsmTransitionId.NullTransition)
        {
            throw new Exception("FSM ERROR: NullTransition is not allowed for a real transition");
        }

        // Check if the currentState has the transition passed as argument
        FsmStateId id = currentState.GetOutputState(trans);

        if (id == FsmStateId.NullStateID)
        {
            throw new Exception("FSM ERROR: State " + currentStateID.ToString() + " does not have a target state " +
                                " for transition " + trans.ToString());
        }

        // Update the currentStateID and currentState
        currentStateID = id;
        foreach (FsmState state in states)
        {
            if (state.ID == currentStateID)
            {
                // Do the post processing of the state before setting the new one
                currentState.DoBeforeLeaving();

                currentState = state;

                // Reset the state to its desired condition before it can reason or act
                currentState.DoBeforeEntering();
                break;
            }
        }
    }     // PerformTransition()