source/libr2c2/trainrouter.cpp

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