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                 float speed;
  26                 TrainRouter *router;
  27                 Route *route;
  28                 std::list<TrainRoutingState *> waits;
  29
  30                 TrainRoutingInfo(Train &);
  31         };
  32
  33         struct OccupiedTrack
  34         {
  35                 Track *track;
  36                 float path_length;
  37                 OccupiedTrack *next;
  38                 unsigned n_tracks;
  39                 unsigned refcount;
  40
  41                 OccupiedTrack(Track &, unsigned, OccupiedTrack *);
  42                 OccupiedTrack(const OccupiedTrack &);
  43                 ~OccupiedTrack();
  44         };
  45
  46         enum TrainState
  47         {
  48                 MOVING,
  49                 WAITING,
  50                 BLOCKED,
  51                 ARRIVED
  52         };
  53
  54         struct TrainRoutingState
  55         {
  56                 TrainRoutingInfo *info;
  57                 TrackIter track;
  58                 unsigned path;
  59                 OccupiedTrack *occupied_tracks;
  60                 float offset;
  61                 float back_offset;
  62                 TrainState state;
  63                 Msp::Time::TimeDelta delay;
  64                 int waypoint;
  65
  66                 TrainRoutingState(TrainRoutingInfo &);
  67                 TrainRoutingState(const TrainRoutingState &);
  68                 ~TrainRoutingState();
  69
  70                 Msp::Time::TimeDelta get_time_to_next_track() const;
  71                 bool is_occupied(Track &) const;
  72                 void advance(float);
  73                 void advance_track(unsigned);
  74         };
  75
  76         struct RoutingStep
  77         {
  78                 Msp::Time::TimeDelta time;
  79                 std::vector<TrainRoutingState> trains;
  80                 RoutingStep *prev;
  81
  82                 RoutingStep();
  83                 RoutingStep(RoutingStep *);
  84
  85                 void advance(const Msp::Time::TimeDelta &);
  86                 bool is_goal() const;
  87
  88                 bool operator<(const RoutingStep &) const;
  89         };
  90
  91         std::vector<TrainRoutingInfo> routed_trains;
  92         std::list<RoutingStep> steps;
  93
  94 public:
  95         TrainRoutePlanner(Layout &);
  96
  97         void plan();
  98 private:
  99         bool update_states(RoutingStep &);
 100         int find_next_train(RoutingStep &);
 101         void add_steps(RoutingStep &, unsigned);
 102         void add_waiting_step(RoutingStep &, unsigned);
 103         void add_steps(RoutingStep &, TrainRoutingState &train);
 104         void create_routes(RoutingStep &);
 105 };
 106
 107 } // namespace R2C2
 108
 109 #endif