source/libr2c2/trainrouteplanner.h

   1 #ifndef LIBR2C2_TRAINROUTEPLANNER_H_
   2 #define LIBR2C2_TRAINROUTEPLANNER_H_
   3
   4 #include <list>
   5 #include <vector>
   6 #include <msp/time/timedelta.h>
   7 #include "trackiter.h"
   8
   9 namespace R2C2 {
  10
  11 class Layout;
  12 class Route;
  13 class Track;
  14 class Train;
  15 class TrainRouter;
  16
  17 class TrainRoutePlanner
  18 {
  19 private:
  20         struct TrainRoutingState;
  21
  22         struct TrainRoutingInfo
  23         {
  24                 Train *train;
  25                 TrainRouter *router;
  26                 Route *route;
  27                 std::list<TrainRoutingState *> waits;
  28
  29                 TrainRoutingInfo(Train &);
  30         };
  31
  32         struct OccupiedTrack
  33         {
  34                 Track *track;
  35                 float path_length;
  36                 OccupiedTrack *next;
  37                 unsigned n_tracks;
  38                 unsigned refcount;
  39
  40                 OccupiedTrack(Track &, unsigned, OccupiedTrack *);
  41                 OccupiedTrack(const OccupiedTrack &);
  42                 ~OccupiedTrack();
  43         };
  44
  45         enum TrainState
  46         {
  47                 MOVING,
  48                 WAITING,
  49                 BLOCKED,
  50                 ARRIVED
  51         };
  52
  53         struct TrainRoutingState
  54         {
  55                 TrainRoutingInfo *info;
  56                 TrackIter track;
  57                 unsigned path;
  58                 OccupiedTrack *occupied_tracks;
  59                 float offset;
  60                 float back_offset;
  61                 TrainState state;
  62
  63                 TrainRoutingState(TrainRoutingInfo &);
  64                 TrainRoutingState(const TrainRoutingState &);
  65                 ~TrainRoutingState();
  66
  67                 Msp::Time::TimeDelta get_time_to_next_track() const;
  68                 bool is_occupied(Track &) const;
  69                 void advance(float);
  70                 void advance_track(unsigned);
  71         };
  72
  73         struct RoutingStep
  74         {
  75                 Msp::Time::TimeDelta time;
  76                 std::vector<TrainRoutingState> trains;
  77                 RoutingStep *prev;
  78
  79                 RoutingStep();
  80                 RoutingStep(RoutingStep *);
  81
  82                 void advance(const Msp::Time::TimeDelta &);
  83                 bool is_goal() const;
  84
  85                 bool operator<(const RoutingStep &) const;
  86         };
  87
  88         std::vector<TrainRoutingInfo> routed_trains;
  89         std::list<RoutingStep> steps;
  90
  91 public:
  92         TrainRoutePlanner(Layout &);
  93
  94         void plan();
  95 private:
  96         bool update_states(RoutingStep &);
  97         int find_next_train(RoutingStep &);
  98         void add_steps(RoutingStep &, unsigned);
  99         void add_waiting_step(RoutingStep &, unsigned);
 100         void add_steps(RoutingStep &, TrainRoutingState &train);
 101         void create_routes(RoutingStep &);
 102 };
 103
 104 } // namespace R2C2
 105
 106 #endif