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<const 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                 Msp::Time::TimeDelta remaining_estimate;
  66                 int blocked_by;
  67
  68                 TrainRoutingState(TrainRoutingInfo &);
  69                 TrainRoutingState(const TrainRoutingState &);
  70                 ~TrainRoutingState();
  71
  72                 Msp::Time::TimeDelta get_time_to_next_track() const;
  73                 bool is_occupying(Track &) const;
  74                 bool check_arrival();
  75                 void advance(float);
  76                 void advance_track(unsigned);
  77                 void update_estimate();
  78         };
  79
  80         struct RoutingStep
  81         {
  82                 Msp::Time::TimeDelta time;
  83                 Msp::Time::TimeDelta total_estimate;
  84                 std::vector<TrainRoutingState> trains;
  85                 const RoutingStep *prev;
  86
  87                 RoutingStep();
  88                 RoutingStep(const RoutingStep *);
  89
  90                 void create_successors(std::list<RoutingStep> &) const;
  91                 bool update_states();
  92                 bool check_deadlocks() const;
  93                 int get_occupant(Track &) const;
  94                 int find_next_train() const;
  95                 void advance(const Msp::Time::TimeDelta &);
  96                 void update_estimate();
  97                 bool is_viable() const;
  98                 bool is_goal() const;
  99
 100                 bool operator<(const RoutingStep &) const;
 101         };
 102
 103         std::vector<TrainRoutingInfo> routed_trains;
 104         std::list<RoutingStep> steps;
 105         std::list<RoutingStep> queue;
 106
 107 public:
 108         TrainRoutePlanner(Layout &);
 109
 110         void plan();
 111 private:
 112         const RoutingStep &get_step();
 113         void add_steps(const RoutingStep &);
 114         void create_routes(const RoutingStep &);
 115 };
 116
 117 } // namespace R2C2
 118
 119 #endif