source/libr2c2/trainrouter.cpp

   1 #include "layout.h"
   2 #include "route.h"
   3 #include "trackiter.h"
   4 #include "train.h"
   5 #include "trackchain.h"
   6 #include "trainrouteplanner.h"
   7 #include "trainrouter.h"
   8
   9 using namespace std;
  10 using namespace Msp;
  11
  12 namespace R2C2 {
  13
  14 TrainRouter::TrainRouter(Train &t):
  15         TrainAI(t),
  16         priority(0),
  17         arriving(0),
  18         destination(0),
  19         update_pending(false)
  20 {
  21         train.get_layout().signal_block_reserved.connect(sigc::mem_fun(this, &TrainRouter::block_reserved));
  22         train.signal_advanced.connect(sigc::mem_fun(this, &TrainRouter::train_advanced));
  23 }
  24
  25 void TrainRouter::set_priority(int p)
  26 {
  27         priority = p;
  28 }
  29
  30 bool TrainRouter::set_route(const Route *r)
  31 {
  32         BlockIter fncb = train.get_first_noncritical_block();
  33
  34         Route *lead = 0;
  35         if(r && train.is_placed())
  36         {
  37                 const BlockAllocator &allocator = train.get_block_allocator();
  38                 TrackIter first = allocator.first().track_iter();
  39                 TrackIter next = fncb.track_iter();
  40                 if(!r->has_track(*next))
  41                 {
  42                         lead = Route::find(next, *r);
  43                         if(!lead)
  44                                 return false;
  45                         create_lead_route(lead, lead);
  46                 }
  47                 else if(!r->has_track(*first))
  48                         lead = create_lead_route(0, r);
  49         }
  50
  51         routes.clear();
  52         if(lead)
  53                 routes.push_back(lead);
  54         if(r)
  55                 routes.push_back(r);
  56         train.stop_at(0);
  57         arriving = 0;
  58
  59         /* TODO destination should also be cleared when manually setting a different
  60         route, but not when the planner calls this. */
  61         if(!r)
  62         {
  63                 destination = 0;
  64                 waypoints.clear();
  65         }
  66
  67         train.refresh_blocks_from(*fncb);
  68
  69         const Route *route = get_route();
  70         signal_route_changed.emit(route);
  71         signal_event.emit(Message("route-changed", route));
  72
  73         return true;
  74 }
  75
  76 void TrainRouter::add_wait(Block &block, Train *tr)
  77 {
  78         Wait wait;
  79         wait.block = &block;
  80         wait.train = tr;
  81         waits.push_back(wait);
  82 }
  83
  84 const Route *TrainRouter::get_route() const
  85 {
  86         if(routes.empty())
  87                 return 0;
  88         return routes.front();
  89 }
  90
  91 void TrainRouter::set_destination(const TrackChain &d)
  92 {
  93         destination = &d;
  94         update_pending = true;
  95 }
  96
  97 bool TrainRouter::is_destination(Track &track) const
  98 {
  99         if(destination)
 100                 return destination->has_track(track);
 101         else
 102                 return false;
 103 }
 104
 105 void TrainRouter::add_waypoint(const TrackChain &wp)
 106 {
 107         waypoints.push_back(&wp);
 108         update_pending = true;
 109 }
 110
 111 bool TrainRouter::is_waypoint(unsigned index, Track &track) const
 112 {
 113         if(index>=waypoints.size())
 114                 throw out_of_range("TrainRouter::is_waypoint");
 115
 116         return waypoints[index]->has_track(track);
 117 }
 118
 119 void TrainRouter::set_departure_delay(const Time::TimeDelta &d)
 120 {
 121         delay = d;
 122         update_pending = true;
 123 }
 124
 125 void TrainRouter::message(const Message &msg)
 126 {
 127         if(msg.type=="set-route")
 128         {
 129                 if(msg.value.check_type<Route *>())
 130                         set_route(msg.value.value<Route *>());
 131                 else
 132                         set_route(msg.value.value<const Route *>());
 133         }
 134         else if(msg.type=="clear-route")
 135                 set_route(0);
 136         else if(msg.type=="set-destination")
 137         {
 138                 if(msg.value.check_type<TrackChain *>())
 139                         set_destination(*msg.value.value<TrackChain *>());
 140                 else
 141                         set_destination(*msg.value.value<const TrackChain *>());
 142         }
 143         else if(msg.type=="add-waypoint")
 144         {
 145                 if(msg.value.check_type<TrackChain *>())
 146                         add_waypoint(*msg.value.value<TrackChain *>());
 147                 else
 148                         add_waypoint(*msg.value.value<const TrackChain *>());
 149         }
 150         else if(msg.type=="set-departure-delay")
 151                 set_departure_delay(msg.value.value<Time::TimeDelta>());
 152 }
 153
 154 void TrainRouter::tick(const Time::TimeDelta &dt)
 155 {
 156         if(delay)
 157         {
 158                 delay -= dt;
 159                 if(delay<=Time::zero)
 160                         delay = Time::zero;
 161         }
 162
 163         if(update_pending)
 164                 create_plans(train.get_layout());
 165
 166         if(arriving==1 && !train.get_speed())
 167         {
 168                 signal_arrived.emit(destination);
 169                 signal_event.emit(Message("arrived", destination));
 170                 arriving = 2;
 171         }
 172         else if(arriving==2 && !train.get_block_allocator().is_active())
 173                 set_route(0);
 174 }
 175
 176 void TrainRouter::save(list<DataFile::Statement> &st) const
 177 {
 178         st.push_back((DataFile::Statement("priority"), priority));
 179
 180         if(!routes.empty())
 181         {
 182                 RouteList::const_iterator i = routes.begin();
 183                 for(; (i!=routes.end() && (*i)->is_temporary()); ++i) ;
 184                 if(i!=routes.end())
 185                         st.push_back((DataFile::Statement("route"), (*i)->get_name()));
 186         }
 187 }
 188
 189 void TrainRouter::block_reserved(Block &block, Train *t)
 190 {
 191         if(t!=&train)
 192         {
 193                 if(!waits.empty() && waits.front().block==&block)
 194                 {
 195                         train.stop_at(0);
 196                         waits.pop_front();
 197                 }
 198                 return;
 199         }
 200
 201         BlockIter b_iter = t->get_block_allocator().iter_for(block);
 202
 203         RouteList::iterator route = routes.begin();
 204         if(advance_route(route, block))
 205         {
 206                 // Check if the block is a turnout and set it to proper path
 207                 if(unsigned taddr = block.get_turnout_address())
 208                 {
 209                         int path = (*route)->get_turnout(taddr);
 210                         if(path>=0)
 211                                 b_iter.track_iter()->set_active_path(path);
 212                 }
 213
 214                 // Check if the next block is still part of the designated route
 215                 BlockIter b_iter_next = b_iter.next(*route);
 216
 217                 RouteList::iterator next_route = route;
 218                 if(!advance_route(next_route, *b_iter_next))
 219                 {
 220                         train.stop_at(&block);
 221                         return;
 222                 }
 223
 224                 if(!waits.empty() && waits.front().block==b_iter_next.block())
 225                         train.stop_at(&block);
 226         }
 227 }
 228
 229 void TrainRouter::train_advanced(Block &block)
 230 {
 231         BlockIter b_iter = train.get_block_allocator().iter_for(block);
 232
 233         // Check if we've reached the next route
 234         if(routes.size()>1)
 235         {
 236                 const Route &route = **++routes.begin();
 237                 if(route.has_track(*b_iter.endpoint().track))
 238                 {
 239                         routes.pop_front();
 240                         const Route *r = get_route();
 241                         // XXX Exceptions?
 242                         signal_route_changed.emit(r);
 243                         signal_event.emit(Message("route-changed", r));
 244                 }
 245         }
 246
 247         if(!waypoints.empty())
 248         {
 249                 const TrackChain &wp = *waypoints.front();
 250                 TrackIter t_iter = b_iter.track_iter();
 251                 if(wp.has_track(*t_iter))
 252                 {
 253                         for(; t_iter; t_iter=t_iter.next())
 254                         {
 255                                 if(!wp.has_track(*t_iter))
 256                                 {
 257                                         waypoints.erase(waypoints.begin());
 258                                         signal_waypoint_reached.emit(&wp);
 259                                         signal_event.emit(Message("waypoint-reached", &wp));
 260                                         break;
 261                                 }
 262                                 else if(!block.has_track(*t_iter))
 263                                         break;
 264                         }
 265                 }
 266         }
 267
 268         if(!routes.empty())
 269         {
 270                 b_iter = b_iter.next();
 271                 if(b_iter && !is_on_route(*b_iter))
 272                         arriving = 1;
 273         }
 274 }
 275
 276 const Route *TrainRouter::get_route_for_block(const Block &block) const
 277 {
 278         const set<Track *> &tracks = block.get_tracks();
 279         for(RouteList::const_iterator i=routes.begin(); i!=routes.end(); ++i)
 280                 for(set<Track *>::const_iterator j=tracks.begin(); j!=tracks.end(); ++j)
 281                         if((*i)->has_track(**j))
 282                                 return *i;
 283
 284         return 0;
 285 }
 286
 287 Route *TrainRouter::create_lead_route(Route *lead, const Route *target)
 288 {
 289         if(!lead)
 290         {
 291                 lead = new Route(train.get_layout());
 292                 lead->set_name("Lead");
 293                 lead->set_temporary(true);
 294         }
 295
 296         set<Track *> tracks;
 297         for(BlockIter i=train.get_block_allocator().first(); (i && i->get_train()==&train); i=i.next())
 298         {
 299                 const set<Track *> &btracks = i->get_tracks();
 300                 for(set<Track *>::const_iterator j=btracks.begin(); j!=btracks.end(); ++j)
 301                         if(!target || !target->has_track(**j))
 302                                 tracks.insert(*j);
 303         }
 304
 305         lead->add_tracks(tracks);
 306
 307         return lead;
 308 }
 309
 310 bool TrainRouter::advance_route(RouteList::iterator &iter, const Block &block)
 311 {
 312         const set<Track *> &tracks = block.get_tracks();
 313         for(; iter!=routes.end(); ++iter)
 314                 for(set<Track *>::const_iterator j=tracks.begin(); j!=tracks.end(); ++j)
 315                         if((*iter)->has_track(**j))
 316                                 return true;
 317
 318         return false;
 319 }
 320
 321 bool TrainRouter::is_on_route(const Block &block)
 322 {
 323         RouteList::iterator iter = routes.begin();
 324         return advance_route(iter, block);
 325 }
 326
 327 void TrainRouter::create_plans(Layout &layout)
 328 {
 329         TrainRoutePlanner planner(layout);
 330         planner.plan();
 331
 332         const map<unsigned, Train *> &trains = layout.get_trains();
 333         for(map<unsigned, Train *>::const_iterator i=trains.begin(); i!=trains.end(); ++i)
 334                 if(TrainRouter *router = i->second->get_ai_of_type<TrainRouter>())
 335                         router->update_pending = false;
 336 }
 337
 338
 339 TrainRouter::Wait::Wait():
 340         block(0),
 341         train(0)
 342 { }
 343
 344
 345 TrainRouter::Loader::Loader(TrainRouter &r):
 346         DataFile::ObjectLoader<TrainRouter>(r)
 347 {
 348         add("priority", &TrainRouter::priority);
 349         add("route",    &Loader::route);
 350 }
 351
 352 void TrainRouter::Loader::route(const string &n)
 353 {
 354         obj.set_route(&obj.train.get_layout().get_route(n));
 355 }
 356
 357 } // namespace R2C2