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