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 "trainroutemetric.h"
   7 #include "trainrouteplanner.h"
   8 #include "trainrouter.h"
   9
  10 using namespace std;
  11 using namespace Msp;
  12
  13 namespace R2C2 {
  14
  15 TrainRouter::TrainRouter(Train &t):
  16         TrainAI(t),
  17         priority(0),
  18         arriving(0),
  19         destination(0),
  20         update_pending(false)
  21 {
  22         train.get_layout().signal_block_reserved.connect(sigc::mem_fun(this, &TrainRouter::block_reserved));
  23         train.signal_advanced.connect(sigc::mem_fun(this, &TrainRouter::train_advanced));
  24 }
  25
  26 TrainRouter::~TrainRouter()
  27 {
  28         for(vector<TrainRouteMetric *>::iterator i=metrics.begin(); i!=metrics.end(); ++i)
  29                 delete *i;
  30 }
  31
  32 void TrainRouter::set_priority(int p)
  33 {
  34         priority = p;
  35 }
  36
  37 bool TrainRouter::set_route(const Route *r)
  38 {
  39         BlockIter fncb = train.get_first_noncritical_block();
  40
  41         Route *lead = 0;
  42         if(r && train.is_placed())
  43         {
  44                 const BlockAllocator &allocator = train.get_block_allocator();
  45                 TrackIter first = allocator.first().track_iter();
  46                 TrackIter next = fncb.track_iter();
  47                 if(!r->has_track(*next))
  48                 {
  49                         lead = Route::find(next, *r);
  50                         if(!lead)
  51                                 return false;
  52                         create_lead_route(lead, lead);
  53                 }
  54                 else if(!r->has_track(*first))
  55                         lead = create_lead_route(0, r);
  56         }
  57
  58         routes.clear();
  59         if(lead)
  60                 routes.push_back(lead);
  61         if(r)
  62                 routes.push_back(r);
  63         train.stop_at(0);
  64         arriving = 0;
  65
  66         /* TODO destination should also be cleared when manually setting a different
  67         route, but not when the planner calls this. */
  68         if(!r)
  69         {
  70                 destination = 0;
  71                 waypoints.clear();
  72         }
  73
  74         train.refresh_blocks_from(*fncb);
  75
  76         const Route *route = get_route();
  77         signal_route_changed.emit(route);
  78         signal_event.emit(Message("route-changed", route));
  79
  80         return true;
  81 }
  82
  83 bool TrainRouter::add_route(const Route &r)
  84 {
  85         if(routes.empty())
  86                 return set_route(&r);
  87
  88         // TODO Check that it can be reached from previous routes
  89         routes.push_back(&r);
  90
  91         return true;
  92 }
  93
  94 void TrainRouter::add_wait(Block &block, Train *tr)
  95 {
  96         Wait wait;
  97         wait.block = &block;
  98         wait.train = tr;
  99         waits.push_back(wait);
 100 }
 101
 102 const Route *TrainRouter::get_route() const
 103 {
 104         if(routes.empty())
 105                 return 0;
 106         return routes.front();
 107 }
 108
 109 void TrainRouter::set_destination(const TrackChain &d)
 110 {
 111         destination = &d;
 112         update_pending = true;
 113 }
 114
 115 bool TrainRouter::is_destination(Track &track) const
 116 {
 117         if(destination)
 118                 return destination->has_track(track);
 119         else
 120                 return false;
 121 }
 122
 123 void TrainRouter::add_waypoint(const TrackChain &wp)
 124 {
 125         waypoints.push_back(&wp);
 126         update_pending = true;
 127 }
 128
 129 bool TrainRouter::is_waypoint(unsigned index, Track &track) const
 130 {
 131         if(index>=waypoints.size())
 132                 throw out_of_range("TrainRouter::is_waypoint");
 133
 134         return waypoints[index]->has_track(track);
 135 }
 136
 137 const TrainRouteMetric &TrainRouter::get_metric(int index) const
 138 {
 139         if(!destination)
 140                 throw logic_error("no metrics");
 141         else if(update_pending)
 142                 throw logic_error("metrics are stale");
 143
 144         if(index<0)
 145                 return *metrics.front();
 146         else if(static_cast<unsigned>(index)>=waypoints.size())
 147                 throw out_of_range("TrainRouter::get_metric");
 148         else
 149                 return *metrics[index+1];
 150 }
 151
 152 void TrainRouter::set_departure_delay(const Time::TimeDelta &d)
 153 {
 154         delay = d;
 155         update_pending = true;
 156 }
 157
 158 void TrainRouter::message(const Message &msg)
 159 {
 160         if(msg.type=="set-route")
 161         {
 162                 if(msg.value.check_type<Route *>())
 163                         set_route(msg.value.value<Route *>());
 164                 else
 165                         set_route(msg.value.value<const Route *>());
 166         }
 167         else if(msg.type=="clear-route")
 168                 set_route(0);
 169         else if(msg.type=="set-destination")
 170         {
 171                 if(msg.value.check_type<TrackChain *>())
 172                         set_destination(*msg.value.value<TrackChain *>());
 173                 else
 174                         set_destination(*msg.value.value<const TrackChain *>());
 175         }
 176         else if(msg.type=="add-waypoint")
 177         {
 178                 if(msg.value.check_type<TrackChain *>())
 179                         add_waypoint(*msg.value.value<TrackChain *>());
 180                 else
 181                         add_waypoint(*msg.value.value<const TrackChain *>());
 182         }
 183         else if(msg.type=="set-departure-delay")
 184                 set_departure_delay(msg.value.value<Time::TimeDelta>());
 185 }
 186
 187 void TrainRouter::tick(const Time::TimeDelta &dt)
 188 {
 189         if(delay)
 190         {
 191                 delay -= dt;
 192                 if(delay<=Time::zero)
 193                         delay = Time::zero;
 194         }
 195
 196         if(update_pending)
 197                 create_plans(train.get_layout());
 198
 199         if(arriving==1 && !train.get_speed())
 200         {
 201                 signal_arrived.emit(destination);
 202                 signal_event.emit(Message("arrived", destination));
 203                 arriving = 2;
 204         }
 205         else if(arriving==2 && !train.get_block_allocator().is_active())
 206                 set_route(0);
 207 }
 208
 209 void TrainRouter::save(list<DataFile::Statement> &st) const
 210 {
 211         st.push_back((DataFile::Statement("priority"), priority));
 212
 213         if(!routes.empty())
 214         {
 215                 RouteList::const_iterator i = routes.begin();
 216                 for(; (i!=routes.end() && (*i)->is_temporary()); ++i) ;
 217                 if(i!=routes.end())
 218                         st.push_back((DataFile::Statement("route"), (*i)->get_name()));
 219         }
 220 }
 221
 222 void TrainRouter::block_reserved(Block &block, Train *t)
 223 {
 224         if(t!=&train)
 225         {
 226                 if(!waits.empty() && waits.front().block==&block)
 227                 {
 228                         train.stop_at(0);
 229                         waits.pop_front();
 230                 }
 231                 return;
 232         }
 233
 234         BlockIter b_iter = t->get_block_allocator().iter_for(block);
 235
 236         RouteList::iterator route = routes.begin();
 237         if(advance_route(route, block))
 238         {
 239                 // Check if the block is a turnout and set it to proper path
 240                 if(unsigned taddr = block.get_turnout_address())
 241                 {
 242                         int path = (*route)->get_turnout(taddr);
 243                         if(path>=0)
 244                                 b_iter.track_iter()->set_active_path(path);
 245                 }
 246
 247                 // Check if the next block is still part of the designated route
 248                 BlockIter b_iter_next = b_iter.next(*route);
 249
 250                 RouteList::iterator next_route = route;
 251                 if(!advance_route(next_route, *b_iter_next))
 252                 {
 253                         train.stop_at(&block);
 254                         return;
 255                 }
 256
 257                 if(!waits.empty() && waits.front().block==b_iter_next.block())
 258                         train.stop_at(&block);
 259         }
 260 }
 261
 262 void TrainRouter::train_advanced(Block &block)
 263 {
 264         BlockIter b_iter = train.get_block_allocator().iter_for(block);
 265
 266         // Check if we've reached the next route
 267         if(routes.size()>1)
 268         {
 269                 const Route &route = **++routes.begin();
 270                 if(route.has_track(*b_iter.endpoint().track))
 271                 {
 272                         routes.pop_front();
 273                         const Route *r = get_route();
 274                         // XXX Exceptions?
 275                         signal_route_changed.emit(r);
 276                         signal_event.emit(Message("route-changed", r));
 277                 }
 278         }
 279
 280         if(!waypoints.empty())
 281         {
 282                 const TrackChain &wp = *waypoints.front();
 283                 TrackIter t_iter = b_iter.track_iter();
 284                 if(wp.has_track(*t_iter))
 285                 {
 286                         for(; t_iter; t_iter=t_iter.next())
 287                         {
 288                                 if(!wp.has_track(*t_iter))
 289                                 {
 290                                         waypoints.erase(waypoints.begin());
 291                                         signal_waypoint_reached.emit(&wp);
 292                                         signal_event.emit(Message("waypoint-reached", &wp));
 293                                         break;
 294                                 }
 295                                 else if(!block.has_track(*t_iter))
 296                                         break;
 297                         }
 298                 }
 299         }
 300
 301         if(!routes.empty())
 302         {
 303                 b_iter = b_iter.next();
 304                 if(b_iter && !is_on_route(*b_iter))
 305                         arriving = 1;
 306         }
 307 }
 308
 309 const Route *TrainRouter::get_route_for_block(const Block &block) const
 310 {
 311         const set<Track *> &tracks = block.get_tracks();
 312         for(RouteList::const_iterator i=routes.begin(); i!=routes.end(); ++i)
 313                 for(set<Track *>::const_iterator j=tracks.begin(); j!=tracks.end(); ++j)
 314                         if((*i)->has_track(**j))
 315                                 return *i;
 316
 317         return 0;
 318 }
 319
 320 void TrainRouter::create_metrics()
 321 {
 322         for(vector<TrainRouteMetric *>::iterator i=metrics.begin(); i!=metrics.end(); ++i)
 323                 delete *i;
 324         metrics.clear();
 325
 326         if(!destination)
 327                 return;
 328
 329         metrics.push_back(new TrainRouteMetric(*destination));
 330         for(vector<const TrackChain *>::const_iterator i=waypoints.begin(); i!=waypoints.end(); ++i)
 331                 metrics.push_back(new TrainRouteMetric(**i));
 332
 333         for(unsigned i=metrics.size(); --i>0; )
 334                 metrics[i]->chain_to(*metrics[(i+1)%metrics.size()]);
 335 }
 336
 337 Route *TrainRouter::create_lead_route(Route *lead, const Route *target)
 338 {
 339         if(!lead)
 340         {
 341                 lead = new Route(train.get_layout());
 342                 lead->set_name("Lead");
 343                 lead->set_temporary(true);
 344         }
 345
 346         bool target_reached = false;
 347         for(TrackIter i=train.get_block_allocator().first().track_iter(); i; i=i.next())
 348         {
 349                 if(i->get_block().get_train()!=&train)
 350                         break;
 351                 if(target)
 352                 {
 353                         if(target->has_track(*i))
 354                                 target_reached = true;
 355                         else if(target_reached)
 356                                 break;
 357                 }
 358                 lead->add_track(*i);
 359         }
 360
 361         return lead;
 362 }
 363
 364 bool TrainRouter::advance_route(RouteList::iterator &iter, const Block &block)
 365 {
 366         const set<Track *> &tracks = block.get_tracks();
 367         for(; iter!=routes.end(); ++iter)
 368                 for(set<Track *>::const_iterator j=tracks.begin(); j!=tracks.end(); ++j)
 369                         if((*iter)->has_track(**j))
 370                                 return true;
 371
 372         return false;
 373 }
 374
 375 bool TrainRouter::is_on_route(const Block &block)
 376 {
 377         RouteList::iterator iter = routes.begin();
 378         return advance_route(iter, block);
 379 }
 380
 381 void TrainRouter::create_plans(Layout &layout)
 382 {
 383         const map<unsigned, Train *> &trains = layout.get_trains();
 384         for(map<unsigned, Train *>::const_iterator i=trains.begin(); i!=trains.end(); ++i)
 385                 if(TrainRouter *router = i->second->get_ai_of_type<TrainRouter>())
 386                 {
 387                         if(router->update_pending)
 388                                 router->create_metrics();
 389                         router->update_pending = false;
 390                 }
 391
 392         TrainRoutePlanner planner(layout);
 393         planner.plan();
 394 }
 395
 396
 397 TrainRouter::Wait::Wait():
 398         block(0),
 399         train(0)
 400 { }
 401
 402
 403 TrainRouter::Loader::Loader(TrainRouter &r):
 404         DataFile::ObjectLoader<TrainRouter>(r)
 405 {
 406         add("priority", &TrainRouter::priority);
 407         add("route",    &Loader::route);
 408 }
 409
 410 void TrainRouter::Loader::route(const string &n)
 411 {
 412         obj.set_route(&obj.train.get_layout().get_route(n));
 413 }
 414
 415 } // namespace R2C2