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