elevator.hpp

   1 /*
   2  * CS356 Project 01 -- Elevator Simulator
   3  *
   4  * Elevator Class Specification
   5  */
   6
   7 #ifndef ELEVATOR_HPP
   8 #define ELEVATOR_HPP
   9
  10 #include <iostream>
  11 #include <list>
  12 #include "direction.hpp"
  13 #include "position.hpp"
  14 #include "stop.hpp"
  15
  16 typedef std::list<Stop> StopList;
  17
  18 enum State { STATE_IDLE, STATE_UP, STATE_DOWN, STATE_WAIT, STATE_OPEN_DOOR, STATE_CLOSE_DOOR };
  19 enum Event { EVT_IDLE, EVT_UP, EVT_DOWN, EVT_WAIT, EVT_OPEN_DOOR, EVT_CLOSE_DOOR };
  20
  21 class Elevator
  22 {
  23         public:
  24                 Elevator ();
  25                 Elevator (int starting_floor);
  26
  27                 void stop_at (Stop &stop);
  28                 float distance_from (Position& pos) const;
  29                 float distance_from (Stop& s) const;
  30                 void move ();
  31                 bool is_idle () const;
  32
  33         private:
  34
  35                 /* State Machine: Helper Functions */
  36                 Event find_next_event () const;
  37
  38                 /* State Machine: Transition Functions */
  39                 void transition_move_up ();
  40                 void transition_move_down ();
  41                 void transition_move_idle ();
  42                 void transition_open_door ();
  43                 void transition_close_door ();
  44                 void transition_begin_wait ();
  45                 void transition_continue_wait ();
  46
  47                 /* Analyze the list of stops */
  48                 bool currently_at_stop () const;
  49
  50                 /* Elevator Status Variables */
  51                 Direction       direction_;
  52                 Position        position_;
  53                 StopList        stops_;
  54
  55                 /* State Machine */
  56                 State state_;
  57                 int wait_;
  58
  59                 static const float ELEVATOR_STEP = 0.1;
  60 };
  61
  62
  63 #endif /* ELEVATOR_HPP */
  64
  65 /* vim: set ts=4 sts=4 sw=4 noexpandtab textwidth=112: */