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                 TrackIter first = train.get_tail_block().track_iter();
  39                 TrackIter next = train.get_head_block().next().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 = false;
  58
  59         train.reserve_more();
  60
  61         const Route *route = get_route();
  62         signal_route_changed.emit(route);
  63         signal_event.emit(Message("route-changed", route));
  64
  65         return true;
  66 }
  67
  68 void TrainRouter::add_wait(Block &block, Train *tr)
  69 {
  70         Wait wait;
  71         wait.block = &block;
  72         wait.train = tr;
  73         waits.push_back(wait);
  74 }
  75
  76 const Route *TrainRouter::get_route() const
  77 {
  78         if(routes.empty())
  79                 return 0;
  80         return routes.front();
  81 }
  82
  83 void TrainRouter::set_destination(const Zone &zone)
  84 {
  85         dest_zone = &zone;
  86         dest_block = 0;
  87         update_pending = true;
  88 }
  89
  90 void TrainRouter::set_destination(const Block &block)
  91 {
  92         dest_zone = 0;
  93         dest_block = &block;
  94         update_pending = true;
  95 }
  96
  97 bool TrainRouter::has_destination() const
  98 {
  99         return dest_zone || dest_block;
 100 }
 101
 102 bool TrainRouter::is_destination(Track &track) const
 103 {
 104         if(dest_zone)
 105                 return dest_zone->has_track(track);
 106         else if(dest_block)
 107                 return dest_block->has_track(track);
 108         else
 109                 return false;
 110 }
 111
 112 void TrainRouter::message(const Message &msg)
 113 {
 114         if(msg.type=="set-route")
 115         {
 116                 if(msg.value.check_type<Route *>())
 117                         set_route(msg.value.value<Route *>());
 118                 else
 119                         set_route(msg.value.value<const Route *>());
 120         }
 121         else if(msg.type=="clear-route")
 122                 set_route(0);
 123         else if(msg.type=="set-destination-block")
 124         {
 125                 if(msg.value.check_type<Block *>())
 126                         set_destination(*msg.value.value<Block *>());
 127                 else
 128                         set_destination(*msg.value.value<const Block *>());
 129         }
 130         else if(msg.type=="set-destination-zone")
 131         {
 132                 if(msg.value.check_type<Zone *>())
 133                         set_destination(*msg.value.value<Zone *>());
 134                 else
 135                         set_destination(*msg.value.value<const Zone *>());
 136         }
 137 }
 138
 139 void TrainRouter::tick(const Time::TimeStamp &, const Time::TimeDelta &)
 140 {
 141         if(update_pending)
 142                 create_plans(train.get_layout());
 143
 144         if(arriving && !train.get_speed())
 145         {
 146                 train.set_active(false);
 147                 signal_arrived.emit();
 148                 signal_event.emit(Message("arrived"));
 149                 set_route(0);
 150         }
 151 }
 152
 153 void TrainRouter::save(list<DataFile::Statement> &st) const
 154 {
 155         st.push_back((DataFile::Statement("priority"), priority));
 156
 157         if(!routes.empty())
 158         {
 159                 RouteList::const_iterator i = routes.begin();
 160                 for(; (i!=routes.end() && (*i)->is_temporary()); ++i) ;
 161                 if(i!=routes.end())
 162                         st.push_back((DataFile::Statement("route"), (*i)->get_name()));
 163         }
 164 }
 165
 166 void TrainRouter::block_reserved(Block &block, Train *t)
 167 {
 168         if(t!=&train)
 169         {
 170                 if(!waits.empty() && waits.front().block==&block)
 171                 {
 172                         train.stop_at(0);
 173                         waits.pop_front();
 174                 }
 175                 return;
 176         }
 177
 178         BlockIter b_iter(&block, t->get_entry_to_block(block));
 179
 180         RouteList::iterator route = routes.begin();
 181         if(advance_route(route, block))
 182         {
 183                 // Check if the block is a turnout and set it to proper path
 184                 if(unsigned tid = block.get_turnout_id())
 185                 {
 186                         int path = (*route)->get_turnout(tid);
 187                         if(path>=0)
 188                                 b_iter.track_iter()->set_active_path(path);
 189                 }
 190
 191                 // Check if the next block is still part of the designated route
 192                 BlockIter b_iter_next = b_iter.next(*route);
 193
 194                 RouteList::iterator next_route = route;
 195                 if(!advance_route(next_route, *b_iter_next))
 196                 {
 197                         train.stop_at(&block);
 198                         return;
 199                 }
 200
 201                 if(!waits.empty() && waits.front().block==b_iter_next.block())
 202                         train.stop_at(&block);
 203         }
 204 }
 205
 206 void TrainRouter::train_advanced(Block &block)
 207 {
 208         // Check if we've reached the next route
 209         if(routes.size()>1)
 210         {
 211                 unsigned entry = train.get_entry_to_block(block);
 212                 Track &track = *block.get_endpoint(entry).track;
 213                 const Route &route = **++routes.begin();
 214                 if(route.has_track(track))
 215                 {
 216                         routes.pop_front();
 217                         // XXX Exceptions?
 218                         signal_event.emit(Message("route-changed", get_route()));
 219                 }
 220         }
 221
 222         if(!routes.empty())
 223         {
 224                 BlockIter iter(&block, train.get_entry_to_block(block));
 225                 iter = iter.next();
 226                 if(iter && !is_on_route(*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_tail_block(); (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