src/Traffic/TrafficMgr.cxx

   1 /******************************************************************************
   2  * TrafficMGr.cxx
   3  * Written by Durk Talsma, started May 5, 2004.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of the
   8  * License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  *
  20  **************************************************************************/
  21
  22 /*
  23  * Traffic manager parses airlines timetable-like data and uses this to
  24  * determine the approximate position of each AI aircraft in its database.
  25  * When an AI aircraft is close to the user's position, a more detailed
  26  * AIModels based simulation is set up.
  27  *
  28  * I'm currently assuming the following simplifications:
  29  * 1) The earth is a perfect sphere
  30  * 2) Each aircraft flies a perfect great circle route.
  31  * 3) Each aircraft flies at a constant speed (with infinite accelerations and
  32  *    decelerations)
  33  * 4) Each aircraft leaves at exactly the departure time.
  34  * 5) Each aircraft arrives at exactly the specified arrival time.
  35  *
  36  *
  37  *****************************************************************************/
  38
  39 #ifdef HAVE_CONFIG_H
  40 #  include "config.h"
  41 #endif
  42
  43 #include <stdlib.h>
  44 #include <time.h>
  45 #include <cstring>
  46 #include <iostream>
  47 #include <fstream>
  48
  49
  50 #include <string>
  51 #include <vector>
  52 #include <algorithm>
  53 #include <boost/foreach.hpp>
  54
  55 #include <simgear/compiler.h>
  56 #include <simgear/misc/sg_path.hxx>
  57 #include <simgear/misc/sg_dir.hxx>
  58 #include <simgear/props/props.hxx>
  59 #include <simgear/structure/subsystem_mgr.hxx>
  60 #include <simgear/xml/easyxml.hxx>
  61 #include <simgear/threads/SGThread.hxx>
  62 #include <simgear/threads/SGGuard.hxx>
  63
  64 #include <AIModel/AIAircraft.hxx>
  65 #include <AIModel/AIFlightPlan.hxx>
  66 #include <AIModel/AIBase.hxx>
  67 #include <Airports/simple.hxx>
  68 #include <Main/fg_init.hxx>
  69
  70
  71
  72 #include "TrafficMgr.hxx"
  73
  74 using std::sort;
  75 using std::strcmp;
  76
  77 /**
  78  * Thread encapsulating parsing the traffic schedules.
  79  */
  80 class ScheduleParseThread : public SGThread
  81 {
  82 public:
  83   ScheduleParseThread(FGTrafficManager* traffic) :
  84     _trafficManager(traffic),
  85     _isFinished(false),
  86     _cancelThread(false)
  87   {
  88
  89   }
  90
  91   // if we're destroyed while running, ensure the thread exits cleanly
  92   ~ScheduleParseThread()
  93   {
  94     _lock.lock();
  95     if (!_isFinished) {
  96       _cancelThread = true; // request cancellation so we don't wait ages
  97       _lock.unlock();
  98       join();
  99     } else {
 100       _lock.unlock();
 101     }
 102   }
 103
 104   void setTrafficDir(const SGPath& trafficDirPath)
 105   {
 106     _trafficDirPath = trafficDirPath;
 107   }
 108
 109   bool isFinished() const
 110   {
 111     SGGuard<SGMutex> g(_lock);
 112     return _isFinished;
 113   }
 114
 115   virtual void run()
 116   {
 117     SGTimeStamp st;
 118     st.stamp();
 119
 120     simgear::Dir trafficDir(_trafficDirPath);
 121     simgear::PathList d = trafficDir.children(simgear::Dir::TYPE_DIR | simgear::Dir::NO_DOT_OR_DOTDOT);
 122
 123     BOOST_FOREACH(SGPath p, d) {
 124       simgear::Dir d2(p);
 125       simgear::PathList trafficFiles = d2.children(simgear::Dir::TYPE_FILE, ".xml");
 126       BOOST_FOREACH(SGPath xml, trafficFiles) {
 127         _trafficManager->parseSchedule(xml);
 128         if (_cancelThread) {
 129           return;
 130         }
 131       }
 132     } // of sub-directories in AI/Traffic iteration
 133
 134   //  _trafficManager->parseSchedules(schedulesToRead);
 135     SG_LOG(SG_AI, SG_INFO, "parsing traffic schedules took:" << st.elapsedMSec() << "msec");
 136
 137     SGGuard<SGMutex> g(_lock);
 138     _isFinished = true;
 139   }
 140 private:
 141   FGTrafficManager* _trafficManager;
 142   mutable SGMutex _lock;
 143   bool _isFinished;
 144   bool _cancelThread;
 145   SGPath _trafficDirPath;
 146 };
 147
 148 /******************************************************************************
 149  * TrafficManager
 150  *****************************************************************************/
 151 FGTrafficManager::FGTrafficManager() :
 152   inited(false),
 153   doingInit(false),
 154   waitingMetarTime(0.0),
 155   enabled("/sim/traffic-manager/enabled"),
 156   aiEnabled("/sim/ai/enabled"),
 157   realWxEnabled("/environment/realwx/enabled"),
 158   metarValid("/environment/metar/valid")
 159 {
 160     //score = 0;
 161     //runCount = 0;
 162     acCounter = 0;
 163 }
 164
 165 FGTrafficManager::~FGTrafficManager()
 166 {
 167     shutdown();
 168 }
 169
 170 void FGTrafficManager::shutdown()
 171 {
 172     if (!inited) {
 173       if (doingInit) {
 174         scheduleParser.reset();
 175         doingInit = false;
 176       }
 177
 178       return;
 179     }
 180
 181     // Save the heuristics data
 182     bool saveData = false;
 183     ofstream cachefile;
 184     if (fgGetBool("/sim/traffic-manager/heuristics")) {
 185         SGPath cacheData(globals->get_fg_home());
 186         cacheData.append("ai");
 187         string airport = fgGetString("/sim/presets/airport-id");
 188
 189         if ((airport) != "") {
 190             char buffer[128];
 191             ::snprintf(buffer, 128, "%c/%c/%c/",
 192                        airport[0], airport[1], airport[2]);
 193             cacheData.append(buffer);
 194             if (!cacheData.exists()) {
 195                 cacheData.create_dir(0777);
 196             }
 197             cacheData.append(airport + "-cache.txt");
 198             //cerr << "Saving AI traffic heuristics" << endl;
 199             saveData = true;
 200             cachefile.open(cacheData.str().c_str());
 201             cachefile << "[TrafficManagerCachedata:ref:2011:09:04]" << endl;
 202         }
 203     }
 204
 205     BOOST_FOREACH(FGAISchedule* acft, scheduledAircraft) {
 206         if (saveData) {
 207             cachefile << acft->getRegistration() << " "
 208                 << acft->getRunCount() << " "
 209                 << acft->getHits() << " "
 210                 << acft->getLastUsed() << endl;
 211         }
 212         delete acft;
 213     }
 214     if (saveData) {
 215         cachefile.close();
 216     }
 217     scheduledAircraft.clear();
 218     flights.clear();
 219
 220     currAircraft = scheduledAircraft.begin();
 221     doingInit = false;
 222     inited = false;
 223 }
 224
 225 /// caution - this is run on the helper thread to improve startup
 226 /// responsiveness - do not access properties or global state from
 227 /// here, since there's no locking protection at all
 228 void FGTrafficManager::parseSchedule(const SGPath& path)
 229 {
 230   readXML(path.str(), *this);
 231 }
 232
 233 void FGTrafficManager::init()
 234 {
 235     if (!enabled) {
 236       return;
 237     }
 238
 239     assert(!doingInit);
 240     doingInit = true;
 241     if (string(fgGetString("/sim/traffic-manager/datafile")) == string("")) {
 242         scheduleParser.reset(new ScheduleParseThread(this));
 243         scheduleParser->setTrafficDir(SGPath(globals->get_fg_root(), "AI/Traffic"));
 244         scheduleParser->start();
 245     } else {
 246         fgSetBool("/sim/traffic-manager/heuristics", false);
 247         SGPath path = string(fgGetString("/sim/traffic-manager/datafile"));
 248         string ext = path.extension();
 249         if (path.extension() == "xml") {
 250             if (path.exists()) {
 251                 readXML(path.str(), *this);
 252             }
 253         } else if (path.extension() == "conf") {
 254             if (path.exists()) {
 255                 readTimeTableFromFile(path);
 256             }
 257         } else {
 258              SG_LOG(SG_AI, SG_ALERT,
 259                                "Unknown data format " << path.str()
 260                                 << " for traffic");
 261         }
 262         //exit(1);
 263     }
 264 }
 265
 266
 267
 268 void FGTrafficManager::finishInit()
 269 {
 270     assert(doingInit);
 271     SG_LOG(SG_AI, SG_INFO, "finishing AI-Traffic init");
 272     loadHeuristics();
 273
 274     // Do sorting and scoring separately, to take advantage of the "homeport" variable
 275     BOOST_FOREACH(FGAISchedule* schedule, scheduledAircraft) {
 276         schedule->setScore();
 277     }
 278
 279     sort(scheduledAircraft.begin(), scheduledAircraft.end(),
 280          compareSchedules);
 281     currAircraft = scheduledAircraft.begin();
 282     currAircraftClosest = scheduledAircraft.begin();
 283
 284     doingInit = false;
 285     inited = true;
 286 }
 287
 288 void FGTrafficManager::loadHeuristics()
 289 {
 290     if (!fgGetBool("/sim/traffic-manager/heuristics")) {
 291         return;
 292     }
 293
 294     HeuristicMap heurMap;
 295     //cerr << "Processing Heuristics" << endl;
 296     // Load the heuristics data
 297     SGPath cacheData(globals->get_fg_home());
 298     cacheData.append("ai");
 299     string airport = fgGetString("/sim/presets/airport-id");
 300     if ((airport) != "") {
 301       char buffer[128];
 302       ::snprintf(buffer, 128, "%c/%c/%c/",
 303                  airport[0], airport[1], airport[2]);
 304       cacheData.append(buffer);
 305       cacheData.append(airport + "-cache.txt");
 306       string revisionStr;
 307       if (cacheData.exists()) {
 308         ifstream data(cacheData.c_str());
 309         data >> revisionStr;
 310         if (revisionStr != "[TrafficManagerCachedata:ref:2011:09:04]") {
 311           SG_LOG(SG_GENERAL, SG_ALERT,"Traffic Manager Warning: discarding outdated cachefile " <<
 312                  cacheData.c_str() << " for Airport " << airport);
 313         } else {
 314           while (1) {
 315             Heuristic h; // = new Heuristic;
 316             data >> h.registration >> h.runCount >> h.hits >> h.lastRun;
 317             if (data.eof())
 318               break;
 319             HeuristicMapIterator itr = heurMap.find(h.registration);
 320             if (itr != heurMap.end()) {
 321               SG_LOG(SG_GENERAL, SG_WARN,"Traffic Manager Warning: found duplicate tailnumber " <<
 322                      h.registration << " for AI aircraft");
 323             } else {
 324               heurMap[h.registration] = h;
 325             }
 326           }
 327         }
 328       }
 329     }
 330
 331   for(currAircraft = scheduledAircraft.begin(); currAircraft != scheduledAircraft.end(); ++currAircraft) {
 332         string registration = (*currAircraft)->getRegistration();
 333         HeuristicMapIterator itr = heurMap.find(registration);
 334         if (itr != heurMap.end()) {
 335             (*currAircraft)->setrunCount(itr->second.runCount);
 336             (*currAircraft)->setHits(itr->second.hits);
 337             (*currAircraft)->setLastUsed(itr->second.lastRun);
 338         }
 339     }
 340 }
 341
 342 bool FGTrafficManager::metarReady(double dt)
 343 {
 344     // wait for valid METAR (when realWX is enabled only), since we need
 345     // to know the active runway
 346     if (metarValid || !realWxEnabled)
 347     {
 348         waitingMetarTime = 0.0;
 349         return true;
 350     }
 351
 352     // METAR timeout: when running offline, remote server is down etc
 353     if (waitingMetarStation != fgGetString("/environment/metar/station-id"))
 354     {
 355         // station has changed: wait for reply, restart timeout
 356         waitingMetarTime = 0.0;
 357         waitingMetarStation = fgGetString("/environment/metar/station-id");
 358         return false;
 359     }
 360
 361     // timeout elapsed (10 seconds)?
 362     if (waitingMetarTime > 20.0)
 363     {
 364         return true;
 365     }
 366
 367     waitingMetarTime += dt;
 368     return false;
 369 }
 370
 371 void FGTrafficManager::update(double dt)
 372 {
 373     if (!enabled)
 374     {
 375         if (inited || doingInit)
 376             shutdown();
 377         return;
 378     }
 379
 380     if (!metarReady(dt))
 381         return;
 382
 383     if (!aiEnabled)
 384     {
 385         // traffic depends on AI module
 386         aiEnabled = true;
 387     }
 388
 389     if (!inited) {
 390         if (!doingInit) {
 391             init();
 392         }
 393
 394         if (!scheduleParser->isFinished()) {
 395           return;
 396         }
 397
 398         finishInit();
 399     }
 400
 401     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
 402     if (scheduledAircraft.empty()) {
 403         return;
 404     }
 405
 406     SGVec3d userCart = globals->get_aircraft_position_cart();
 407
 408     if (currAircraft == scheduledAircraft.end()) {
 409         currAircraft = scheduledAircraft.begin();
 410     }
 411     //cerr << "Processing << " << (*currAircraft)->getRegistration() << " with score " << (*currAircraft)->getScore() << endl;
 412     if (!((*currAircraft)->update(now, userCart))) {
 413         (*currAircraft)->taint();
 414     }
 415     currAircraft++;
 416 }
 417
 418 void FGTrafficManager::readTimeTableFromFile(SGPath infileName)
 419 {
 420     string model;
 421     string livery;
 422     string homePort;
 423     string registration;
 424     string flightReq;
 425     bool   isHeavy;
 426     string acType;
 427     string airline;
 428     string m_class;
 429     string FlightType;
 430     double radius;
 431     double offset;
 432
 433     char buffer[256];
 434     string buffString;
 435     vector <string> tokens, depTime,arrTime;
 436     vector <string>::iterator it;
 437     ifstream infile(infileName.str().c_str());
 438     while (1) {
 439          infile.getline(buffer, 256);
 440          if (infile.eof()) {
 441              break;
 442          }
 443          //cerr << "Read line : " << buffer << endl;
 444          buffString = string(buffer);
 445          tokens.clear();
 446          Tokenize(buffString, tokens, " \t");
 447          //for (it = tokens.begin(); it != tokens.end(); it++) {
 448          //    cerr << "Tokens: " << *(it) << endl;
 449          //}
 450          //cerr << endl;
 451          if (!tokens.empty()) {
 452              if (tokens[0] == string("AC")) {
 453                  if (tokens.size() != 13) {
 454                      SG_LOG(SG_GENERAL, SG_ALERT, "Error parsing traffic file " << infileName.str() << " at " << buffString);
 455                      exit(1);
 456                  }
 457                  model          = tokens[12];
 458                  livery         = tokens[6];
 459                  homePort       = tokens[1];
 460                  registration   = tokens[2];
 461                  if (tokens[11] == string("false")) {
 462                      isHeavy = false;
 463                  } else {
 464                      isHeavy = true;
 465                  }
 466                  acType         = tokens[4];
 467                  airline        = tokens[5];
 468                  flightReq      = tokens[3] + tokens[5];
 469                  m_class        = tokens[10];
 470                  FlightType     = tokens[9];
 471                  radius         = atof(tokens[8].c_str());
 472                  offset         = atof(tokens[7].c_str());;
 473
 474                  if (!FGAISchedule::validModelPath(model)) {
 475                      SG_LOG(SG_GENERAL, SG_WARN, "TrafficMgr: Missing model path:" <<
 476                             model << " from " << infileName.str());
 477                  } else {
 478
 479                  SG_LOG(SG_GENERAL, SG_INFO, "Adding Aircraft" << model << " " << livery << " " << homePort << " "
 480                                                                 << registration << " " << flightReq << " " << isHeavy
 481                                                                 << " " << acType << " " << airline << " " << m_class
 482                                                                 << " " << FlightType << " " << radius << " " << offset);
 483                  scheduledAircraft.push_back(new FGAISchedule(model,
 484                                                               livery,
 485                                                               homePort,
 486                                                               registration,
 487                                                               flightReq,
 488                                                               isHeavy,
 489                                                               acType,
 490                                                               airline,
 491                                                               m_class,
 492                                                               FlightType,
 493                                                               radius,
 494                                                               offset));
 495                  } // of valid model path
 496              }
 497              if (tokens[0] == string("FLIGHT")) {
 498                  //cerr << "Found flight " << buffString << " size is : " << tokens.size() << endl;
 499                  if (tokens.size() != 10) {
 500                      SG_LOG(SG_GENERAL, SG_ALERT, "Error parsing traffic file " << infileName.str() << " at " << buffString);
 501                      exit(1);
 502                  }
 503                  string callsign = tokens[1];
 504                  string fltrules = tokens[2];
 505                  string weekdays = tokens[3];
 506                  string departurePort = tokens[5];
 507                  string arrivalPort   = tokens[7];
 508                  int    cruiseAlt     = atoi(tokens[8].c_str());
 509                  string depTimeGen    = tokens[4];
 510                  string arrTimeGen    = tokens[6];
 511                  string repeat        = "WEEK";
 512                  string requiredAircraft = tokens[9];
 513
 514                  if (weekdays.size() != 7) {
 515                      SG_LOG(SG_GENERAL, SG_ALERT, "Found misconfigured weekdays string" << weekdays);
 516                      exit(1);
 517                  }
 518                  depTime.clear();
 519                  arrTime.clear();
 520                  Tokenize(depTimeGen, depTime, ":");
 521                  Tokenize(arrTimeGen, arrTime, ":");
 522                  double dep = atof(depTime[0].c_str()) + (atof(depTime[1].c_str()) / 60.0);
 523                  double arr = atof(arrTime[0].c_str()) + (atof(arrTime[1].c_str()) / 60.0);
 524                  //cerr << "Using " << dep << " " << arr << endl;
 525                  bool arrivalWeekdayNeedsIncrement = false;
 526                  if (arr < dep) {
 527                        arrivalWeekdayNeedsIncrement = true;
 528                  }
 529                  for (int i = 0; i < 7; i++) {
 530                      int j = i+1;
 531                      if (weekdays[i] != '.') {
 532                          char buffer[4];
 533                          snprintf(buffer, 4, "%d/", j);
 534                          string departureTime = string(buffer) + depTimeGen + string(":00");
 535                          string arrivalTime;
 536                          if (!arrivalWeekdayNeedsIncrement) {
 537                              arrivalTime   = string(buffer) + arrTimeGen + string(":00");
 538                          }
 539                          if (arrivalWeekdayNeedsIncrement && i != 6 ) {
 540                              snprintf(buffer, 4, "%d/", j+1);
 541                              arrivalTime   = string(buffer) + arrTimeGen + string(":00");
 542                          }
 543                          if (arrivalWeekdayNeedsIncrement && i == 6 ) {
 544                              snprintf(buffer, 4, "%d/", 0);
 545                              arrivalTime   = string(buffer) + arrTimeGen  + string(":00");
 546                          }
 547                          SG_LOG(SG_GENERAL, SG_ALERT, "Adding flight " << callsign       << " "
 548                                                       << fltrules       << " "
 549                                                       <<  departurePort << " "
 550                                                       <<  arrivalPort   << " "
 551                                                       <<  cruiseAlt     << " "
 552                                                       <<  departureTime << " "
 553                                                       <<  arrivalTime   << " "
 554                                                       << repeat        << " "
 555                                                       <<  requiredAircraft);
 556
 557                          flights[requiredAircraft].push_back(new FGScheduledFlight(callsign,
 558                                                                  fltrules,
 559                                                                  departurePort,
 560                                                                  arrivalPort,
 561                                                                  cruiseAlt,
 562                                                                  departureTime,
 563                                                                  arrivalTime,
 564                                                                  repeat,
 565                                                                  requiredAircraft));
 566                     }
 567                 }
 568              }
 569          }
 570
 571     }
 572     //exit(1);
 573 }
 574
 575
 576 void FGTrafficManager::Tokenize(const string& str,
 577                       vector<string>& tokens,
 578                       const string& delimiters)
 579 {
 580     // Skip delimiters at beginning.
 581     string::size_type lastPos = str.find_first_not_of(delimiters, 0);
 582     // Find first "non-delimiter".
 583     string::size_type pos     = str.find_first_of(delimiters, lastPos);
 584
 585     while (string::npos != pos || string::npos != lastPos)
 586     {
 587         // Found a token, add it to the vector.
 588         tokens.push_back(str.substr(lastPos, pos - lastPos));
 589         // Skip delimiters.  Note the "not_of"
 590         lastPos = str.find_first_not_of(delimiters, pos);
 591         // Find next "non-delimiter"
 592         pos = str.find_first_of(delimiters, lastPos);
 593     }
 594 }
 595
 596
 597 void FGTrafficManager::startXML()
 598 {
 599     //cout << "Start XML" << endl;
 600     requiredAircraft = "";
 601     homePort = "";
 602 }
 603
 604 void FGTrafficManager::endXML()
 605 {
 606     //cout << "End XML" << endl;
 607 }
 608
 609 void FGTrafficManager::startElement(const char *name,
 610                                     const XMLAttributes & atts)
 611 {
 612     const char *attval;
 613     //cout << "Start element " << name << endl;
 614     //FGTrafficManager temp;
 615     //for (int i = 0; i < atts.size(); i++)
 616     //  if (string(atts.getName(i)) == string("include"))
 617     attval = atts.getValue("include");
 618     if (attval != 0) {
 619         //cout << "including " << attval << endl;
 620         SGPath path = globals->get_fg_root();
 621         path.append("/Traffic/");
 622         path.append(attval);
 623         readXML(path.str(), *this);
 624     }
 625     elementValueStack.push_back("");
 626     //  cout << "  " << atts.getName(i) << '=' << atts.getValue(i) << endl;
 627 }
 628
 629 void FGTrafficManager::endElement(const char *name)
 630 {
 631     //cout << "End element " << name << endl;
 632     const string & value = elementValueStack.back();
 633
 634     if (!strcmp(name, "model"))
 635         mdl = value;
 636     else if (!strcmp(name, "livery"))
 637         livery = value;
 638     else if (!strcmp(name, "home-port"))
 639         homePort = value;
 640     else if (!strcmp(name, "registration"))
 641         registration = value;
 642     else if (!strcmp(name, "airline"))
 643         airline = value;
 644     else if (!strcmp(name, "actype"))
 645         acType = value;
 646     else if (!strcmp(name, "required-aircraft"))
 647         requiredAircraft = value;
 648     else if (!strcmp(name, "flighttype"))
 649         flighttype = value;
 650     else if (!strcmp(name, "radius"))
 651         radius = atoi(value.c_str());
 652     else if (!strcmp(name, "offset"))
 653         offset = atoi(value.c_str());
 654     else if (!strcmp(name, "performance-class"))
 655         m_class = value;
 656     else if (!strcmp(name, "heavy")) {
 657         if (value == string("true"))
 658             heavy = true;
 659         else
 660             heavy = false;
 661     } else if (!strcmp(name, "callsign"))
 662         callsign = value;
 663     else if (!strcmp(name, "fltrules"))
 664         fltrules = value;
 665     else if (!strcmp(name, "port"))
 666         port = value;
 667     else if (!strcmp(name, "time"))
 668         timeString = value;
 669     else if (!strcmp(name, "departure")) {
 670         departurePort = port;
 671         departureTime = timeString;
 672     } else if (!strcmp(name, "cruise-alt"))
 673         cruiseAlt = atoi(value.c_str());
 674     else if (!strcmp(name, "arrival")) {
 675         arrivalPort = port;
 676         arrivalTime = timeString;
 677     } else if (!strcmp(name, "repeat"))
 678         repeat = value;
 679     else if (!strcmp(name, "flight")) {
 680         // We have loaded and parsed all the information belonging to this flight
 681         // so we temporarily store it.
 682         //cerr << "Pusing back flight " << callsign << endl;
 683         //cerr << callsign  <<  " " << fltrules     << " "<< departurePort << " " <<  arrivalPort << " "
 684         //   << cruiseAlt <<  " " << departureTime<< " "<< arrivalTime   << " " << repeat << endl;
 685
 686         //Prioritize aircraft
 687         string apt = fgGetString("/sim/presets/airport-id");
 688         //cerr << "Airport information: " << apt << " " << departurePort << " " << arrivalPort << endl;
 689         //if (departurePort == apt) score++;
 690         //flights.push_back(new FGScheduledFlight(callsign,
 691         //                                fltrules,
 692         //                                departurePort,
 693         //                                arrivalPort,
 694         //                                cruiseAlt,
 695         //                                departureTime,
 696         //                                arrivalTime,
 697         //                                repeat));
 698         if (requiredAircraft == "") {
 699             char buffer[16];
 700             snprintf(buffer, 16, "%d", acCounter);
 701             requiredAircraft = buffer;
 702         }
 703         SG_LOG(SG_GENERAL, SG_DEBUG, "Adding flight: " << callsign << " "
 704                << fltrules << " "
 705                << departurePort << " "
 706                << arrivalPort << " "
 707                << cruiseAlt << " "
 708                << departureTime << " "
 709                << arrivalTime << " " << repeat << " " << requiredAircraft);
 710         // For database maintainance purposes, it may be convenient to
 711         //
 712         if (fgGetBool("/sim/traffic-manager/dumpdata") == true) {
 713              SG_LOG(SG_GENERAL, SG_ALERT, "Traffic Dump FLIGHT," << callsign << ","
 714                           << fltrules << ","
 715                           << departurePort << ","
 716                           << arrivalPort << ","
 717                           << cruiseAlt << ","
 718                           << departureTime << ","
 719                           << arrivalTime << "," << repeat << "," << requiredAircraft);
 720         }
 721         flights[requiredAircraft].push_back(new FGScheduledFlight(callsign,
 722                                                                   fltrules,
 723                                                                   departurePort,
 724                                                                   arrivalPort,
 725                                                                   cruiseAlt,
 726                                                                   departureTime,
 727                                                                   arrivalTime,
 728                                                                   repeat,
 729                                                                   requiredAircraft));
 730         requiredAircraft = "";
 731     } else if (!strcmp(name, "aircraft")) {
 732         endAircraft();
 733     }
 734
 735     elementValueStack.pop_back();
 736 }
 737
 738 void FGTrafficManager::endAircraft()
 739 {
 740     string isHeavy = heavy ? "true" : "false";
 741
 742     if (missingModels.find(mdl) != missingModels.end()) {
 743     // don't stat() or warn again
 744         requiredAircraft = homePort = "";
 745         return;
 746     }
 747
 748     if (!FGAISchedule::validModelPath(mdl)) {
 749         missingModels.insert(mdl);
 750         SG_LOG(SG_GENERAL, SG_WARN, "TrafficMgr: Missing model path:" << mdl);
 751         requiredAircraft = homePort = "";
 752         return;
 753     }
 754
 755     int proportion =
 756         (int) (fgGetDouble("/sim/traffic-manager/proportion") * 100);
 757     int randval = rand() & 100;
 758     if (randval > proportion) {
 759         requiredAircraft = homePort = "";
 760         return;
 761     }
 762
 763     if (fgGetBool("/sim/traffic-manager/dumpdata") == true) {
 764         SG_LOG(SG_GENERAL, SG_ALERT, "Traffic Dump AC," << homePort << "," << registration << "," << requiredAircraft
 765                << "," << acType << "," << livery << ","
 766                << airline << ","  << m_class << "," << offset << "," << radius << "," << flighttype << "," << isHeavy << "," << mdl);
 767     }
 768
 769     if (requiredAircraft == "") {
 770         char buffer[16];
 771         snprintf(buffer, 16, "%d", acCounter);
 772         requiredAircraft = buffer;
 773     }
 774     if (homePort == "") {
 775         homePort = departurePort;
 776     }
 777
 778     scheduledAircraft.push_back(new FGAISchedule(mdl,
 779                                                  livery,
 780                                                  homePort,
 781                                                  registration,
 782                                                  requiredAircraft,
 783                                                  heavy,
 784                                                  acType,
 785                                                  airline,
 786                                                  m_class,
 787                                                  flighttype,
 788                                                  radius, offset));
 789
 790     acCounter++;
 791     requiredAircraft = "";
 792     homePort = "";
 793     score = 0;
 794 }
 795
 796 void FGTrafficManager::data(const char *s, int len)
 797 {
 798     string token = string(s, len);
 799     //cout << "Character data " << string(s,len) << endl;
 800     elementValueStack.back() += token;
 801 }
 802
 803 void FGTrafficManager::pi(const char *target, const char *data)
 804 {
 805     //cout << "Processing instruction " << target << ' ' << data << endl;
 806 }
 807
 808 void FGTrafficManager::warning(const char *message, int line, int column)
 809 {
 810     SG_LOG(SG_IO, SG_WARN,
 811            "Warning: " << message << " (" << line << ',' << column << ')');
 812 }
 813
 814 void FGTrafficManager::error(const char *message, int line, int column)
 815 {
 816     SG_LOG(SG_IO, SG_ALERT,
 817            "Error: " << message << " (" << line << ',' << column << ')');
 818 }