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         train.refresh_blocks_from(*fncb);
  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::set_departure_delay(const Time::TimeDelta &d)
 114 {
 115         delay = d;
 116         update_pending = true;
 117 }
 118
 119 void TrainRouter::message(const Message &msg)
 120 {
 121         if(msg.type=="set-route")
 122         {
 123                 if(msg.value.check_type<Route *>())
 124                         set_route(msg.value.value<Route *>());
 125                 else
 126                         set_route(msg.value.value<const Route *>());
 127         }
 128         else if(msg.type=="clear-route")
 129                 set_route(0);
 130         else if(msg.type=="set-destination-block")
 131         {
 132                 if(msg.value.check_type<Block *>())
 133                         set_destination(*msg.value.value<Block *>());
 134                 else
 135                         set_destination(*msg.value.value<const Block *>());
 136         }
 137         else if(msg.type=="set-destination-zone")
 138         {
 139                 if(msg.value.check_type<Zone *>())
 140                         set_destination(*msg.value.value<Zone *>());
 141                 else
 142                         set_destination(*msg.value.value<const Zone *>());
 143         }
 144         else if(msg.type=="set-departure-delay")
 145                 set_departure_delay(msg.value.value<Time::TimeDelta>());
 146 }
 147
 148 void TrainRouter::tick(const Time::TimeDelta &dt)
 149 {
 150         if(delay)
 151         {
 152                 delay -= dt;
 153                 if(delay<=Time::zero)
 154                         delay = Time::zero;
 155         }
 156
 157         if(update_pending)
 158                 create_plans(train.get_layout());
 159
 160         if(arriving==1 && !train.get_speed())
 161         {
 162                 signal_arrived.emit();
 163                 signal_event.emit(Message("arrived"));
 164                 arriving = 2;
 165         }
 166         else if(arriving==2 && !train.get_block_allocator().is_active())
 167                 set_route(0);
 168 }
 169
 170 void TrainRouter::save(list<DataFile::Statement> &st) const
 171 {
 172         st.push_back((DataFile::Statement("priority"), priority));
 173
 174         if(!routes.empty())
 175         {
 176                 RouteList::const_iterator i = routes.begin();
 177                 for(; (i!=routes.end() && (*i)->is_temporary()); ++i) ;
 178                 if(i!=routes.end())
 179                         st.push_back((DataFile::Statement("route"), (*i)->get_name()));
 180         }
 181 }
 182
 183 void TrainRouter::block_reserved(Block &block, Train *t)
 184 {
 185         if(t!=&train)
 186         {
 187                 if(!waits.empty() && waits.front().block==&block)
 188                 {
 189                         train.stop_at(0);
 190                         waits.pop_front();
 191                 }
 192                 return;
 193         }
 194
 195         BlockIter b_iter = t->get_block_allocator().iter_for(block);
 196
 197         RouteList::iterator route = routes.begin();
 198         if(advance_route(route, block))
 199         {
 200                 // Check if the block is a turnout and set it to proper path
 201                 if(unsigned taddr = block.get_turnout_address())
 202                 {
 203                         int path = (*route)->get_turnout(taddr);
 204                         if(path>=0)
 205                                 b_iter.track_iter()->set_active_path(path);
 206                 }
 207
 208                 // Check if the next block is still part of the designated route
 209                 BlockIter b_iter_next = b_iter.next(*route);
 210
 211                 RouteList::iterator next_route = route;
 212                 if(!advance_route(next_route, *b_iter_next))
 213                 {
 214                         train.stop_at(&block);
 215                         return;
 216                 }
 217
 218                 if(!waits.empty() && waits.front().block==b_iter_next.block())
 219                         train.stop_at(&block);
 220         }
 221 }
 222
 223 void TrainRouter::train_advanced(Block &block)
 224 {
 225         BlockIter b_iter = train.get_block_allocator().iter_for(block);
 226
 227         // Check if we've reached the next route
 228         if(routes.size()>1)
 229         {
 230                 const Route &route = **++routes.begin();
 231                 if(route.has_track(*b_iter.endpoint().track))
 232                 {
 233                         routes.pop_front();
 234                         // XXX Exceptions?
 235                         signal_event.emit(Message("route-changed", get_route()));
 236                 }
 237         }
 238
 239         if(!routes.empty())
 240         {
 241                 b_iter = b_iter.next();
 242                 if(b_iter && !is_on_route(*b_iter))
 243                         arriving = 1;
 244         }
 245 }
 246
 247 const Route *TrainRouter::get_route_for_block(const Block &block) const
 248 {
 249         const set<Track *> &tracks = block.get_tracks();
 250         for(RouteList::const_iterator i=routes.begin(); i!=routes.end(); ++i)
 251                 for(set<Track *>::const_iterator j=tracks.begin(); j!=tracks.end(); ++j)
 252                         if((*i)->has_track(**j))
 253                                 return *i;
 254
 255         return 0;
 256 }
 257
 258 Route *TrainRouter::create_lead_route(Route *lead, const Route *target)
 259 {
 260         if(!lead)
 261         {
 262                 lead = new Route(train.get_layout());
 263                 lead->set_name("Lead");
 264                 lead->set_temporary(true);
 265         }
 266
 267         set<Track *> tracks;
 268         for(BlockIter i=train.get_block_allocator().first(); (i && i->get_train()==&train); i=i.next())
 269         {
 270                 const set<Track *> &btracks = i->get_tracks();
 271                 for(set<Track *>::const_iterator j=btracks.begin(); j!=btracks.end(); ++j)
 272                         if(!target || !target->has_track(**j))
 273                                 tracks.insert(*j);
 274         }
 275
 276         lead->add_tracks(tracks);
 277
 278         return lead;
 279 }
 280
 281 bool TrainRouter::advance_route(RouteList::iterator &iter, const Block &block)
 282 {
 283         const set<Track *> &tracks = block.get_tracks();
 284         for(; iter!=routes.end(); ++iter)
 285                 for(set<Track *>::const_iterator j=tracks.begin(); j!=tracks.end(); ++j)
 286                         if((*iter)->has_track(**j))
 287                                 return true;
 288
 289         return false;
 290 }
 291
 292 bool TrainRouter::is_on_route(const Block &block)
 293 {
 294         RouteList::iterator iter = routes.begin();
 295         return advance_route(iter, block);
 296 }
 297
 298 void TrainRouter::create_plans(Layout &layout)
 299 {
 300         TrainRoutePlanner planner(layout);
 301         planner.plan();
 302
 303         const map<unsigned, Train *> &trains = layout.get_trains();
 304         for(map<unsigned, Train *>::const_iterator i=trains.begin(); i!=trains.end(); ++i)
 305                 if(TrainRouter *router = i->second->get_ai_of_type<TrainRouter>())
 306                         router->update_pending = false;
 307 }
 308
 309
 310 TrainRouter::Wait::Wait():
 311         block(0),
 312         train(0)
 313 { }
 314
 315
 316 TrainRouter::Loader::Loader(TrainRouter &r):
 317         DataFile::ObjectLoader<TrainRouter>(r)
 318 {
 319         add("priority", &TrainRouter::priority);
 320         add("route",    &Loader::route);
 321 }
 322
 323 void TrainRouter::Loader::route(const string &n)
 324 {
 325         obj.set_route(&obj.train.get_layout().get_route(n));
 326 }
 327
 328 } // namespace R2C2