src/ATC/trafficcontrol.cxx

   1 // trafficrecord.cxx - Implementation of AIModels ATC code.
   2 //
   3 // Written by Durk Talsma, started September 2006.
   4 //
   5 // Copyright (C) 2006 Durk Talsma.
   6 //
   7 // This program is free software; you can redistribute it and/or
   8 // modify it under the terms of the GNU General Public License as
   9 // published by the Free Software Foundation; either version 2 of the
  10 // License, or (at your option) any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful, but
  13 // WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 // General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License
  18 // along with this program; if not, write to the Free Software
  19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  20 //
  21 // $Id$
  22
  23 #ifdef HAVE_CONFIG_H
  24 #  include <config.h>
  25 #endif
  26
  27 #include <algorithm>
  28
  29 #include "trafficcontrol.hxx"
  30 #include "atc_mgr.hxx"
  31 #include <AIModel/AIAircraft.hxx>
  32 #include <AIModel/AIFlightPlan.hxx>
  33 #include <AIModel/performancedata.hxx>
  34 #include <AIModel/performancedb.hxx>
  35 #include <ATC/atc_mgr.hxx>
  36 #include <Traffic/TrafficMgr.hxx>
  37 #include <Airports/groundnetwork.hxx>
  38 #include <Airports/dynamics.hxx>
  39 #include <Airports/simple.hxx>
  40
  41 using std::sort;
  42
  43 /***************************************************************************
  44  * ActiveRunway
  45  **************************************************************************/
  46 time_t ActiveRunway::requestTimeSlot(time_t eta)
  47 {
  48     time_t newEta;
  49     time_t separation = 90;
  50     bool found = false;
  51     if (estimatedArrivalTimes.size() == 0) {
  52         estimatedArrivalTimes.push_back(eta);
  53         return eta;
  54     } else {
  55         TimeVectorIterator i = estimatedArrivalTimes.begin();
  56         //cerr << "Checking eta slots " << eta << ": " << endl;
  57         for (i = estimatedArrivalTimes.begin();
  58              i != estimatedArrivalTimes.end(); i++) {
  59             //cerr << "Stored time : " << (*i) << endl;
  60         }
  61         i = estimatedArrivalTimes.begin();
  62         if ((eta + separation) < (*i)) {
  63             newEta = eta;
  64             found = true;
  65             //cerr << "Storing at beginning" << endl;
  66         }
  67         while ((i != estimatedArrivalTimes.end()) && (!found)) {
  68             TimeVectorIterator j = i + 1;
  69             if (j == estimatedArrivalTimes.end()) {
  70                 if (((*i) + separation) < eta) {
  71                     //cerr << "Storing at end" << endl;
  72                     newEta = eta;
  73                 } else {
  74                     newEta = (*i) + separation;
  75                     //cerr << "Storing at end + separation" << endl;
  76                 }
  77             } else {
  78                 if ((((*j) - (*i)) > (separation * 2))) {       // found a potential slot
  79                     // now check whether this slow is usable:
  80                     // 1) eta should fall between the two points
  81                     //    i.e. eta > i AND eta < j
  82                     //
  83                     //cerr << "Found potential slot after " << (*i) << endl;
  84                     if (eta > (*i) && (eta < (*j))) {
  85                         found = true;
  86                         if (eta < ((*i) + separation)) {
  87                             newEta = (*i) + separation;
  88                             //cerr << "Using  original" << (*i) << " + separation " << endl;
  89                         } else {
  90                             newEta = eta;
  91                             //cerr << "Using original after " << (*i) << endl;
  92                         }
  93                     } else if (eta < (*i)) {
  94                         found = true;
  95                         newEta = (*i) + separation;
  96                         //cerr << "Using delayed slot after " << (*i) << endl;
  97                     }
  98                     /*
  99                        if (((*j) - separation) < eta) {
 100                        found = true;
 101                        if (((*i) + separation) < eta) {
 102                        newEta = eta;
 103                        cerr << "Using original after " << (*i) << endl;
 104                        } else {
 105                        newEta = (*i) + separation;
 106                        cerr << "Using  " << (*i) << " + separation " << endl;
 107                        }
 108                        } */
 109                 }
 110             }
 111             i++;
 112         }
 113     }
 114     //cerr << ". done. New ETA : " << newEta << endl;
 115
 116     estimatedArrivalTimes.push_back(newEta);
 117     sort(estimatedArrivalTimes.begin(), estimatedArrivalTimes.end());
 118     // do some housekeeping : remove any timestamps that are past
 119     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
 120     TimeVectorIterator i = estimatedArrivalTimes.begin();
 121     while (i != estimatedArrivalTimes.end()) {
 122         if ((*i) < now) {
 123             //cerr << "Deleting timestamp " << (*i) << " (now = " << now << "). " << endl;
 124             estimatedArrivalTimes.erase(i);
 125             i = estimatedArrivalTimes.begin();
 126         } else {
 127             i++;
 128         }
 129     }
 130     return newEta;
 131 }
 132
 133 /***************************************************************************
 134  * FGTrafficRecord
 135  **************************************************************************/
 136 FGTrafficRecord::FGTrafficRecord():
 137 id(0), waitsForId(0),
 138 currentPos(0),
 139 leg(0),
 140 frequencyId(0),
 141 state(0),
 142 allowTransmission(true),
 143 latitude(0), longitude(0), heading(0), speed(0), altitude(0), radius(0)
 144 {
 145 }
 146
 147 void FGTrafficRecord::setPositionAndIntentions(int pos,
 148                                                FGAIFlightPlan * route)
 149 {
 150
 151     currentPos = pos;
 152     if (intentions.size()) {
 153         intVecIterator i = intentions.begin();
 154         if ((*i) != pos) {
 155             SG_LOG(SG_GENERAL, SG_ALERT,
 156                    "Error in FGTrafficRecord::setPositionAndIntentions");
 157             //cerr << "Pos : " << pos << " Curr " << *(intentions.begin())  << endl;
 158             for (intVecIterator i = intentions.begin();
 159                  i != intentions.end(); i++) {
 160                 //cerr << (*i) << " ";
 161             }
 162             //cerr << endl;
 163         }
 164         intentions.erase(i);
 165     } else {
 166         //FGAIFlightPlan::waypoint* const wpt= route->getCurrentWaypoint();
 167         int size = route->getNrOfWayPoints();
 168         //cerr << "Setting pos" << pos << " ";
 169         //cerr << "setting intentions ";
 170         for (int i = 0; i < size; i++) {
 171             int val = route->getRouteIndex(i);
 172             //cerr << val<< " ";
 173             if ((val) && (val != pos)) {
 174                 intentions.push_back(val);
 175                 //cerr << "[set] ";
 176             }
 177         }
 178         //cerr << endl;
 179         //while (route->next(&legNr, &routeNr)) {
 180         //intentions.push_back(routeNr);
 181         //}
 182         //route->rewind(currentPos);
 183     }
 184     //exit(1);
 185 }
 186
 187 bool FGTrafficRecord::checkPositionAndIntentions(FGTrafficRecord & other)
 188 {
 189     bool result = false;
 190     //cerr << "Start check 1" << endl;
 191     if (currentPos == other.currentPos) {
 192         //cerr << callsign << ": Check Position and intentions: we are on the same taxiway" << other.callsign << "Index = " << currentPos << endl;
 193         result = true;
 194     }
 195     //  else if (other.intentions.size())
 196     //     {
 197     //       cerr << "Start check 2" << endl;
 198     //       intVecIterator i = other.intentions.begin();
 199     //       while (!((i == other.intentions.end()) || ((*i) == currentPos)))
 200     //     i++;
 201     //       if (i != other.intentions.end()) {
 202     //     cerr << "Check Position and intentions: current matches other.intentions" << endl;
 203     //     result = true;
 204     //       }
 205     else if (intentions.size()) {
 206         //cerr << "Start check 3" << endl;
 207         intVecIterator i = intentions.begin();
 208         //while (!((i == intentions.end()) || ((*i) == other.currentPos)))
 209         while (i != intentions.end()) {
 210             if ((*i) == other.currentPos) {
 211                 break;
 212             }
 213             i++;
 214         }
 215         if (i != intentions.end()) {
 216             //cerr << callsign << ": Check Position and intentions: .other.current matches" << other.callsign << "Index = " << (*i) << endl;
 217             result = true;
 218         }
 219     }
 220     //cerr << "Done !!" << endl;
 221     return result;
 222 }
 223
 224 void FGTrafficRecord::setPositionAndHeading(double lat, double lon,
 225                                             double hdg, double spd,
 226                                             double alt)
 227 {
 228     latitude = lat;
 229     longitude = lon;
 230     heading = hdg;
 231     speed = spd;
 232     altitude = alt;
 233 }
 234
 235 int FGTrafficRecord::crosses(FGGroundNetwork * net,
 236                              FGTrafficRecord & other)
 237 {
 238     if (checkPositionAndIntentions(other)
 239         || (other.checkPositionAndIntentions(*this)))
 240         return -1;
 241     intVecIterator i, j;
 242     int currentTargetNode = 0, otherTargetNode = 0;
 243     if (currentPos > 0)
 244         currentTargetNode = net->findSegment(currentPos)->getEnd()->getIndex(); // OKAY,...
 245     if (other.currentPos > 0)
 246         otherTargetNode = net->findSegment(other.currentPos)->getEnd()->getIndex();     // OKAY,...
 247     if ((currentTargetNode == otherTargetNode) && currentTargetNode > 0)
 248         return currentTargetNode;
 249     if (intentions.size()) {
 250         for (i = intentions.begin(); i != intentions.end(); i++) {
 251             if ((*i) > 0) {
 252                 if ((currentTargetNode ==
 253                      net->findSegment(*i)->getEnd()->getIndex())) {
 254                     //cerr << "Current crosses at " << currentTargetNode <<endl;
 255                     return currentTargetNode;
 256                 }
 257             }
 258         }
 259     }
 260     if (other.intentions.size()) {
 261         for (i = other.intentions.begin(); i != other.intentions.end();
 262              i++) {
 263             if ((*i) > 0) {
 264                 if (otherTargetNode ==
 265                     net->findSegment(*i)->getEnd()->getIndex()) {
 266                     //cerr << "Other crosses at " << currentTargetNode <<endl;
 267                     return otherTargetNode;
 268                 }
 269             }
 270         }
 271     }
 272     if (intentions.size() && other.intentions.size()) {
 273         for (i = intentions.begin(); i != intentions.end(); i++) {
 274             for (j = other.intentions.begin(); j != other.intentions.end();
 275                  j++) {
 276                 //cerr << "finding segment " << *i << " and " << *j << endl;
 277                 if (((*i) > 0) && ((*j) > 0)) {
 278                     currentTargetNode =
 279                         net->findSegment(*i)->getEnd()->getIndex();
 280                     otherTargetNode =
 281                         net->findSegment(*j)->getEnd()->getIndex();
 282                     if (currentTargetNode == otherTargetNode) {
 283                         //cerr << "Routes will cross at " << currentTargetNode << endl;
 284                         return currentTargetNode;
 285                     }
 286                 }
 287             }
 288         }
 289     }
 290     return -1;
 291 }
 292
 293 bool FGTrafficRecord::onRoute(FGGroundNetwork * net,
 294                               FGTrafficRecord & other)
 295 {
 296     int node = -1, othernode = -1;
 297     if (currentPos > 0)
 298         node = net->findSegment(currentPos)->getEnd()->getIndex();
 299     if (other.currentPos > 0)
 300         othernode =
 301             net->findSegment(other.currentPos)->getEnd()->getIndex();
 302     if ((node == othernode) && (node != -1))
 303         return true;
 304     if (other.intentions.size()) {
 305         for (intVecIterator i = other.intentions.begin();
 306              i != other.intentions.end(); i++) {
 307             if (*i > 0) {
 308                 othernode = net->findSegment(*i)->getEnd()->getIndex();
 309                 if ((node == othernode) && (node > -1))
 310                     return true;
 311             }
 312         }
 313     }
 314     //if (other.currentPos > 0)
 315     //  othernode = net->findSegment(other.currentPos)->getEnd()->getIndex();
 316     //if (intentions.size())
 317     //  {
 318     //    for (intVecIterator i = intentions.begin(); i != intentions.end(); i++)
 319     //    {
 320     //      if (*i > 0)
 321     //        {
 322     //          node = net->findSegment(*i)->getEnd()->getIndex();
 323     //          if ((node == othernode) && (node > -1))
 324     //            return true;
 325     //        }
 326     //    }
 327     //  }
 328     return false;
 329 }
 330
 331
 332 bool FGTrafficRecord::isOpposing(FGGroundNetwork * net,
 333                                  FGTrafficRecord & other, int node)
 334 {
 335     // Check if current segment is the reverse segment for the other aircraft
 336     FGTaxiSegment *opp;
 337     //cerr << "Current segment " << currentPos << endl;
 338     if ((currentPos > 0) && (other.currentPos > 0)) {
 339         opp = net->findSegment(currentPos)->opposite();
 340         if (opp) {
 341             if (opp->getIndex() == other.currentPos)
 342                 return true;
 343         }
 344
 345         for (intVecIterator i = intentions.begin(); i != intentions.end();
 346              i++) {
 347             if ((opp = net->findSegment(other.currentPos)->opposite())) {
 348                 if ((*i) > 0)
 349                     if (opp->getIndex() ==
 350                         net->findSegment(*i)->getIndex()) {
 351                         if (net->findSegment(*i)->getStart()->getIndex() ==
 352                             node) {
 353                             {
 354                                 //cerr << "Found the node " << node << endl;
 355                                 return true;
 356                             }
 357                         }
 358                     }
 359             }
 360             if (other.intentions.size()) {
 361                 for (intVecIterator j = other.intentions.begin();
 362                      j != other.intentions.end(); j++) {
 363                     // cerr << "Current segment 1 " << (*i) << endl;
 364                     if ((*i) > 0) {
 365                         if ((opp = net->findSegment(*i)->opposite())) {
 366                             if (opp->getIndex() ==
 367                                 net->findSegment(*j)->getIndex()) {
 368                                 //cerr << "Nodes " << net->findSegment(*i)->getIndex()
 369                                 //   << " and  " << net->findSegment(*j)->getIndex()
 370                                 //   << " are opposites " << endl;
 371                                 if (net->findSegment(*i)->getStart()->
 372                                     getIndex() == node) {
 373                                     {
 374                                         //cerr << "Found the node " << node << endl;
 375                                         return true;
 376                                     }
 377                                 }
 378                             }
 379                         }
 380                     }
 381                 }
 382             }
 383         }
 384     }
 385     return false;
 386 }
 387
 388 void FGTrafficRecord::setSpeedAdjustment(double spd)
 389 {
 390     instruction.setChangeSpeed(true);
 391     instruction.setSpeed(spd);
 392 }
 393
 394 void FGTrafficRecord::setHeadingAdjustment(double heading)
 395 {
 396     instruction.setChangeHeading(true);
 397     instruction.setHeading(heading);
 398 }
 399
 400 bool FGTrafficRecord::pushBackAllowed()
 401 {
 402     // With the user ATC / AI integration, checking whether the user's aircraft is near no longer works, because
 403     // this will effectively block the user's aircraft itself from receiving pushback clearance.
 404     // So, what can we do?
 405     /*
 406     double course, az2, dist;
 407     SGGeod curr(SGGeod::fromDegM(getLongitude(),
 408                                  getLatitude(), getAltitude()));
 409
 410     double userLatitude = fgGetDouble("/position/latitude-deg");
 411     double userLongitude = fgGetDouble("/position/longitude-deg");
 412     SGGeod user(SGGeod::fromDeg(userLongitude, userLatitude));
 413     SGGeodesy::inverse(curr, user, course, az2, dist);
 414     //cerr << "Distance to user : " << dist << endl;
 415     return (dist > 250);
 416     */
 417
 418
 419     // In essence, we should check whether the pusbback route itself, as well as the associcated
 420     // taxiways near the pushback point are free of traffic.
 421     // To do so, we need to
 422     return true;
 423 }
 424
 425
 426
 427 /***************************************************************************
 428  * FGATCInstruction
 429  *
 430  **************************************************************************/
 431 FGATCInstruction::FGATCInstruction()
 432 {
 433     holdPattern = false;
 434     holdPosition = false;
 435     changeSpeed = false;
 436     changeHeading = false;
 437     changeAltitude = false;
 438     resolveCircularWait = false;
 439
 440     speed = 0;
 441     heading = 0;
 442     alt = 0;
 443 }
 444
 445
 446 bool FGATCInstruction::hasInstruction()
 447 {
 448     return (holdPattern || holdPosition || changeSpeed || changeHeading
 449             || changeAltitude || resolveCircularWait);
 450 }
 451
 452 /***************************************************************************
 453  * FGATCController
 454  *
 455  **************************************************************************/
 456
 457
 458
 459
 460 FGATCController::FGATCController()
 461 {
 462     cerr << "running FGATController constructor" << endl;
 463     dt_count = 0;
 464     available = true;
 465     lastTransmission = 0;
 466     initialized = false;
 467 }
 468
 469 FGATCController::~FGATCController()
 470 {
 471      cerr << "running FGATController destructor" << endl;
 472 }
 473
 474 string FGATCController::getGateName(FGAIAircraft * ref)
 475 {
 476     return ref->atGate();
 477 }
 478
 479 bool FGATCController::isUserAircraft(FGAIAircraft* ac)
 480 {
 481     return (ac->getCallSign() == fgGetString("/sim/multiplay/callsign")) ? true : false;
 482 };
 483
 484 void FGATCController::transmit(FGTrafficRecord * rec, AtcMsgId msgId,
 485                                AtcMsgDir msgDir, bool audible)
 486 {
 487     string sender, receiver;
 488     int stationFreq = 0;
 489     int taxiFreq = 0;
 490     int freqId = 0;
 491     string atisInformation;
 492     string text;
 493     string taxiFreqStr;
 494     double heading = 0;
 495     string activeRunway;
 496     string fltType;
 497     string rwyClass;
 498     string SID;
 499     string transponderCode;
 500     FGAIFlightPlan *fp;
 501     string fltRules;
 502
 503     //double commFreqD;
 504     sender = rec->getAircraft()->getTrafficRef()->getCallSign();
 505     //cerr << "transmitting for: " << sender << "Leg = " << rec->getLeg() << endl;
 506     switch (rec->getLeg()) {
 507     case 2:
 508     case 3:
 509         freqId = rec->getNextFrequency();
 510         stationFreq =
 511             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 512             getDynamics()->getGroundFrequency(rec->getLeg() + freqId);
 513         taxiFreq =
 514             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 515             getDynamics()->getGroundFrequency(3);
 516         receiver =
 517             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 518             getName() + "-Ground";
 519         atisInformation =
 520             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 521             getDynamics()->getAtisInformation();
 522         break;
 523     case 4:
 524         receiver =
 525             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 526             getName() + "-Tower";
 527         break;
 528     }
 529     // Swap sender and receiver value in case of a ground to air transmission
 530     if (msgDir == ATC_GROUND_TO_AIR) {
 531         string tmp = sender;
 532         sender = receiver;
 533         receiver = tmp;
 534     }
 535     switch (msgId) {
 536     case MSG_ANNOUNCE_ENGINE_START:
 537         text = sender + ". Ready to Start up";
 538         break;
 539     case MSG_REQUEST_ENGINE_START:
 540         text =
 541             receiver + ", This is " + sender + ". Position " +
 542             getGateName(rec->getAircraft()) + ". Information " +
 543             atisInformation + ". " +
 544             rec->getAircraft()->getTrafficRef()->getFlightRules() +
 545             " to " +
 546             rec->getAircraft()->getTrafficRef()->getArrivalAirport()->
 547             getName() + ". Request start-up";
 548         break;
 549         // Acknowledge engine startup permission
 550         // Assign departure runway
 551         // Assign SID, if necessery (TODO)
 552     case MSG_PERMIT_ENGINE_START:
 553         taxiFreqStr = formatATCFrequency3_2(taxiFreq);
 554
 555         heading = rec->getAircraft()->getTrafficRef()->getCourse();
 556         fltType = rec->getAircraft()->getTrafficRef()->getFlightType();
 557         rwyClass =
 558             rec->getAircraft()->GetFlightPlan()->
 559             getRunwayClassFromTrafficType(fltType);
 560
 561         rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 562             getDynamics()->getActiveRunway(rwyClass, 1, activeRunway,
 563                                            heading);
 564         rec->getAircraft()->GetFlightPlan()->setRunway(activeRunway);
 565         fp = rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 566             getDynamics()->getSID(activeRunway, heading);
 567         rec->getAircraft()->GetFlightPlan()->setSID(fp);
 568         if (fp) {
 569             SID = fp->getName() + " departure";
 570         } else {
 571             SID = "fly runway heading ";
 572         }
 573         //snprintf(buffer, 7, "%3.2f", heading);
 574         fltRules = rec->getAircraft()->getTrafficRef()->getFlightRules();
 575         transponderCode = genTransponderCode(fltRules);
 576         rec->getAircraft()->SetTransponderCode(transponderCode);
 577         text =
 578             receiver + ". Start-up approved. " + atisInformation +
 579             " correct, runway " + activeRunway + ", " + SID + ", squawk " +
 580             transponderCode + ". " +
 581             "For push-back and taxi clearance call " + taxiFreqStr + ". " +
 582             sender + " control.";
 583         break;
 584     case MSG_DENY_ENGINE_START:
 585         text = receiver + ". Standby";
 586         break;
 587     case MSG_ACKNOWLEDGE_ENGINE_START:
 588         fp = rec->getAircraft()->GetFlightPlan()->getSID();
 589         if (fp) {
 590             SID =
 591                 rec->getAircraft()->GetFlightPlan()->getSID()->getName() +
 592                 " departure";
 593         } else {
 594             SID = "fly runway heading ";
 595         }
 596         taxiFreqStr = formatATCFrequency3_2(taxiFreq);
 597         activeRunway = rec->getAircraft()->GetFlightPlan()->getRunway();
 598         transponderCode = rec->getAircraft()->GetTransponderCode();
 599         text =
 600             receiver + ". Start-up approved. " + atisInformation +
 601             " correct, runway " + activeRunway + ", " + SID + ", squawk " +
 602             transponderCode + ". " +
 603             "For push-back and taxi clearance call " + taxiFreqStr + ". " +
 604             sender;
 605         break;
 606     case MSG_ACKNOWLEDGE_SWITCH_GROUND_FREQUENCY:
 607         taxiFreqStr = formatATCFrequency3_2(taxiFreq);
 608         text = receiver + ". Switching to " + taxiFreqStr + ". " + sender;
 609         break;
 610     case MSG_INITIATE_CONTACT:
 611         text = receiver + ". With you. " + sender;
 612         break;
 613     case MSG_ACKNOWLEDGE_INITIATE_CONTACT:
 614         text = receiver + ". Roger. " + sender;
 615         break;
 616     case MSG_REQUEST_PUSHBACK_CLEARANCE:
 617         text = receiver + ". Request push-back. " + sender;
 618         break;
 619     case MSG_PERMIT_PUSHBACK_CLEARANCE:
 620         text = receiver + ". Push-back approved. " + sender;
 621         break;
 622     case MSG_HOLD_PUSHBACK_CLEARANCE:
 623         text = receiver + ". Standby. " + sender;
 624         break;
 625     case MSG_REQUEST_TAXI_CLEARANCE:
 626         text = receiver + ". Ready to Taxi. " + sender;
 627         break;
 628     case MSG_ISSUE_TAXI_CLEARANCE:
 629         text = receiver + ". Cleared to taxi. " + sender;
 630         break;
 631     case MSG_ACKNOWLEDGE_TAXI_CLEARANCE:
 632         text = receiver + ". Cleared to taxi. " + sender;
 633         break;
 634     case MSG_HOLD_POSITION:
 635         text = receiver + ". Hold Position. " + sender;
 636         break;
 637     case MSG_ACKNOWLEDGE_HOLD_POSITION:
 638         text = receiver + ". Holding Position. " + sender;
 639         break;
 640     case MSG_RESUME_TAXI:
 641         text = receiver + ". Resume Taxiing. " + sender;
 642         break;
 643     case MSG_ACKNOWLEDGE_RESUME_TAXI:
 644         text = receiver + ". Continuing Taxi. " + sender;
 645         break;
 646     default:
 647         text = text + sender + ". Transmitting unknown Message";
 648         break;
 649     }
 650     if (audible) {
 651         double onBoardRadioFreq0 =
 652             fgGetDouble("/instrumentation/comm[0]/frequencies/selected-mhz");
 653         double onBoardRadioFreq1 =
 654             fgGetDouble("/instrumentation/comm[1]/frequencies/selected-mhz");
 655         int onBoardRadioFreqI0 = (int) floor(onBoardRadioFreq0 * 100 + 0.5);
 656         int onBoardRadioFreqI1 = (int) floor(onBoardRadioFreq1 * 100 + 0.5);
 657         //cerr << "Using " << onBoardRadioFreq0 << ", " << onBoardRadioFreq1 << " and " << stationFreq << " for " << text << endl;
 658
 659         // Display ATC message only when one of the radios is tuned
 660         // the relevant frequency.
 661         // Note that distance attenuation is currently not yet implemented
 662         if ((onBoardRadioFreqI0 == stationFreq)
 663             || (onBoardRadioFreqI1 == stationFreq)) {
 664             if (rec->allowTransmissions()) {
 665                 fgSetString("/sim/messages/atc", text.c_str());
 666             }
 667         }
 668     } else {
 669         FGATCManager *atc = (FGATCManager*) globals->get_subsystem("atc");
 670         atc->getATCDialog()->addEntry(1, text);
 671
 672     }
 673 }
 674
 675 string FGATCController::formatATCFrequency3_2(int freq)
 676 {
 677     char buffer[7];
 678     snprintf(buffer, 7, "%3.2f", ((float) freq / 100.0));
 679     return string(buffer);
 680 }
 681
 682 // TODO: Set transponder codes according to real-world routes.
 683 // The current version just returns a random string of four octal numbers.
 684 string FGATCController::genTransponderCode(string fltRules)
 685 {
 686     if (fltRules == "VFR") {
 687         return string("1200");
 688     } else {
 689         char buffer[5];
 690         snprintf(buffer, 5, "%d%d%d%d", rand() % 8, rand() % 8, rand() % 8,
 691                  rand() % 8);
 692         return string(buffer);
 693     }
 694 }
 695
 696 void FGATCController::init()
 697 {
 698    if (!initialized) {
 699        FGATCManager *mgr = (FGATCManager*) globals->get_subsystem("ATC");
 700        mgr->addController(this);
 701        initialized = true;
 702     }
 703 }
 704
 705 /***************************************************************************
 706  * class FGTowerController
 707  *
 708  **************************************************************************/
 709 FGTowerController::FGTowerController():
 710 FGATCController()
 711 {
 712 }
 713
 714 //
 715 void FGTowerController::announcePosition(int id,
 716                                          FGAIFlightPlan * intendedRoute,
 717                                          int currentPosition, double lat,
 718                                          double lon, double heading,
 719                                          double speed, double alt,
 720                                          double radius, int leg,
 721                                          FGAIAircraft * ref)
 722 {
 723     init();
 724     TrafficVectorIterator i = activeTraffic.begin();
 725     // Search whether the current id alread has an entry
 726     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 727     if (activeTraffic.size()) {
 728         //while ((i->getId() != id) && i != activeTraffic.end()) {
 729         while (i != activeTraffic.end()) {
 730             if (i->getId() == id) {
 731                 break;
 732             }
 733             i++;
 734         }
 735     }
 736     // Add a new TrafficRecord if no one exsists for this aircraft.
 737     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 738         FGTrafficRecord rec;
 739         rec.setId(id);
 740
 741         rec.setPositionAndHeading(lat, lon, heading, speed, alt);
 742         rec.setRunway(intendedRoute->getRunway());
 743         rec.setLeg(leg);
 744         //rec.setCallSign(callsign);
 745         rec.setAircraft(ref);
 746         activeTraffic.push_back(rec);
 747     } else {
 748         i->setPositionAndHeading(lat, lon, heading, speed, alt);
 749     }
 750 }
 751
 752 void FGTowerController::updateAircraftInformation(int id, double lat, double lon,
 753                                                   double heading, double speed, double alt,
 754                                                   double dt)
 755 {
 756     TrafficVectorIterator i = activeTraffic.begin();
 757     // Search whether the current id has an entry
 758     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 759     TrafficVectorIterator current, closest;
 760     if (activeTraffic.size()) {
 761         //while ((i->getId() != id) && i != activeTraffic.end()) {
 762         while (i != activeTraffic.end()) {
 763             if (i->getId() == id) {
 764                 break;
 765             }
 766             i++;
 767         }
 768     }
 769 //    // update position of the current aircraft
 770     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 771         SG_LOG(SG_GENERAL, SG_ALERT,
 772                "AI error: updating aircraft without traffic record");
 773     } else {
 774         i->setPositionAndHeading(lat, lon, heading, speed, alt);
 775         current = i;
 776     }
 777     setDt(getDt() + dt);
 778
 779 //    // see if we already have a clearance record for the currently active runway
 780     ActiveRunwayVecIterator rwy = activeRunways.begin();
 781     // again, a map might be more efficient here
 782     if (activeRunways.size()) {
 783         //while ((rwy->getRunwayName() != current->getRunway()) && (rwy != activeRunways.end())) {
 784         while (rwy != activeRunways.end()) {
 785             if (rwy->getRunwayName() == current->getRunway()) {
 786                 break;
 787             }
 788             rwy++;
 789         }
 790     }
 791     if (rwy == activeRunways.end()) {
 792         ActiveRunway aRwy(current->getRunway(), id);
 793         activeRunways.push_back(aRwy);  // Since there are no clearance records for this runway yet
 794         current->setHoldPosition(false);        // Clear the current aircraft to continue
 795     } else {
 796         // Okay, we have a clearance record for this runway, so check
 797         // whether the clearence ID matches that of the current aircraft
 798         if (id == rwy->getCleared()) {
 799             current->setHoldPosition(false);
 800         } else {
 801             current->setHoldPosition(true);
 802         }
 803     }
 804 }
 805
 806
 807 void FGTowerController::signOff(int id)
 808 {
 809     TrafficVectorIterator i = activeTraffic.begin();
 810     // Search search if the current id alread has an entry
 811     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 812     if (activeTraffic.size()) {
 813         //while ((i->getId() != id) && i != activeTraffic.end()) {
 814         while (i != activeTraffic.end()) {
 815             if (i->getId() == id) {
 816                 break;
 817             }
 818             i++;
 819         }
 820     }
 821     // If this aircraft has left the runway, we can clear the departure record for this runway
 822     ActiveRunwayVecIterator rwy = activeRunways.begin();
 823     if (activeRunways.size()) {
 824         //while ((rwy->getRunwayName() != i->getRunway()) && (rwy != activeRunways.end())) {
 825         while (rwy != activeRunways.end()) {
 826             if (rwy->getRunwayName() == i->getRunway()) {
 827                 break;
 828             }
 829             rwy++;
 830         }
 831         if (rwy != activeRunways.end()) {
 832             rwy = activeRunways.erase(rwy);
 833         } else {
 834             SG_LOG(SG_GENERAL, SG_ALERT,
 835                    "AI error: Attempting to erase non-existing runway clearance record in FGTowerController::signoff");
 836         }
 837     }
 838     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 839         SG_LOG(SG_GENERAL, SG_ALERT,
 840                "AI error: Aircraft without traffic record is signing off from tower");
 841     } else {
 842         i = activeTraffic.erase(i);
 843     }
 844 }
 845
 846 // NOTE:
 847 // IF WE MAKE TRAFFICRECORD A MEMBER OF THE BASE CLASS
 848 // THE FOLLOWING THREE FUNCTIONS: SIGNOFF, HAS INSTRUCTION AND GETINSTRUCTION CAN
 849 // BECOME DEVIRTUALIZED AND BE A MEMBER OF THE BASE ATCCONTROLLER CLASS
 850 // WHICH WOULD SIMPLIFY CODE MAINTENANCE.
 851 // Note that this function is probably obsolete
 852 bool FGTowerController::hasInstruction(int id)
 853 {
 854     TrafficVectorIterator i = activeTraffic.begin();
 855     // Search search if the current id has an entry
 856     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 857     if (activeTraffic.size()) {
 858         //while ((i->getId() != id) && i != activeTraffic.end()) {
 859         while (i != activeTraffic.end()) {
 860             if (i->getId() == id) {
 861                 break;
 862             }
 863             i++;
 864         }
 865     }
 866     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 867         SG_LOG(SG_GENERAL, SG_ALERT,
 868                "AI error: checking ATC instruction for aircraft without traffic record");
 869     } else {
 870         return i->hasInstruction();
 871     }
 872     return false;
 873 }
 874
 875
 876 FGATCInstruction FGTowerController::getInstruction(int id)
 877 {
 878     TrafficVectorIterator i = activeTraffic.begin();
 879     // Search search if the current id has an entry
 880     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 881     if (activeTraffic.size()) {
 882         //while ((i->getId() != id) && i != activeTraffic.end()) {
 883         while (i != activeTraffic.end()) {
 884             if (i->getId() == id) {
 885                 break;
 886             }
 887             i++;
 888         }
 889     }
 890     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 891         SG_LOG(SG_GENERAL, SG_ALERT,
 892                "AI error: requesting ATC instruction for aircraft without traffic record");
 893     } else {
 894         return i->getInstruction();
 895     }
 896     return FGATCInstruction();
 897 }
 898
 899 /***************************************************************************
 900  * class FGStartupController
 901  *
 902  **************************************************************************/
 903 FGStartupController::FGStartupController():
 904 FGATCController()
 905 {
 906 }
 907
 908 void FGStartupController::announcePosition(int id,
 909                                            FGAIFlightPlan * intendedRoute,
 910                                            int currentPosition, double lat,
 911                                            double lon, double heading,
 912                                            double speed, double alt,
 913                                            double radius, int leg,
 914                                            FGAIAircraft * ref)
 915 {
 916     init();
 917     TrafficVectorIterator i = activeTraffic.begin();
 918     // Search whether the current id alread has an entry
 919     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 920     if (activeTraffic.size()) {
 921         //while ((i->getId() != id) && i != activeTraffic.end()) {
 922         while (i != activeTraffic.end()) {
 923             if (i->getId() == id) {
 924                 break;
 925             }
 926             i++;
 927         }
 928     }
 929     // Add a new TrafficRecord if no one exsists for this aircraft.
 930     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 931         FGTrafficRecord rec;
 932         rec.setId(id);
 933
 934         rec.setPositionAndHeading(lat, lon, heading, speed, alt);
 935         rec.setRunway(intendedRoute->getRunway());
 936         rec.setLeg(leg);
 937         //rec.setCallSign(callsign);
 938         rec.setAircraft(ref);
 939         rec.setHoldPosition(true);
 940         activeTraffic.push_back(rec);
 941     } else {
 942         i->setPositionAndHeading(lat, lon, heading, speed, alt);
 943
 944     }
 945 }
 946
 947 // NOTE:
 948 // IF WE MAKE TRAFFICRECORD A MEMBER OF THE BASE CLASS
 949 // THE FOLLOWING THREE FUNCTIONS: SIGNOFF, HAS INSTRUCTION AND GETINSTRUCTION CAN
 950 // BECOME DEVIRTUALIZED AND BE A MEMBER OF THE BASE ATCCONTROLLER CLASS
 951 // WHICH WOULD SIMPLIFY CODE MAINTENANCE.
 952 // Note that this function is probably obsolete
 953 bool FGStartupController::hasInstruction(int id)
 954 {
 955     TrafficVectorIterator i = activeTraffic.begin();
 956     // Search search if the current id has an entry
 957     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 958     if (activeTraffic.size()) {
 959         //while ((i->getId() != id) && i != activeTraffic.end()) {
 960         while (i != activeTraffic.end()) {
 961             if (i->getId() == id) {
 962                 break;
 963             }
 964             i++;
 965         }
 966     }
 967     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 968         SG_LOG(SG_GENERAL, SG_ALERT,
 969                "AI error: checking ATC instruction for aircraft without traffic record");
 970     } else {
 971         return i->hasInstruction();
 972     }
 973     return false;
 974 }
 975
 976
 977 FGATCInstruction FGStartupController::getInstruction(int id)
 978 {
 979     TrafficVectorIterator i = activeTraffic.begin();
 980     // Search search if the current id has an entry
 981     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 982     if (activeTraffic.size()) {
 983         //while ((i->getId() != id) && i != activeTraffic.end()) {
 984         while (i != activeTraffic.end()) {
 985             if (i->getId() == id) {
 986                 break;
 987             }
 988             i++;
 989         }
 990     }
 991     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 992         SG_LOG(SG_GENERAL, SG_ALERT,
 993                "AI error: requesting ATC instruction for aircraft without traffic record");
 994     } else {
 995         return i->getInstruction();
 996     }
 997     return FGATCInstruction();
 998 }
 999
1000 void FGStartupController::signOff(int id)
1001 {
1002     TrafficVectorIterator i = activeTraffic.begin();
1003     // Search search if the current id alread has an entry
1004     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1005     if (activeTraffic.size()) {
1006         //while ((i->getId() != id) && i != activeTraffic.end()) {
1007         while (i != activeTraffic.end()) {
1008             if (i->getId() == id) {
1009                 break;
1010             }
1011             i++;
1012         }
1013     }
1014     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1015         SG_LOG(SG_GENERAL, SG_ALERT,
1016                "AI error: Aircraft without traffic record is signing off from tower");
1017     } else {
1018         i = activeTraffic.erase(i);
1019     }
1020 }
1021
1022 bool FGStartupController::checkTransmissionState(int st, time_t now, time_t startTime, TrafficVectorIterator i, AtcMsgId msgId,
1023                                AtcMsgDir msgDir)
1024 {
1025     int state = i->getState();
1026     if ((state == st) && available) {
1027         if ((msgDir == ATC_AIR_TO_GROUND) && isUserAircraft(i->getAircraft())) {
1028
1029             cerr << "Checking state " << st << " for " << i->getAircraft()->getCallSign() << endl;
1030             static SGPropertyNode_ptr trans_num = globals->get_props()->getNode("/sim/atc/transmission-num", true);
1031             int n = trans_num->getIntValue();
1032             if (n >= 0) {
1033                 trans_num->setIntValue(-1);
1034                  // PopupCallback(n);
1035                  cerr << "Selected transmission message" << n << endl;
1036                  FGATCManager *atc = (FGATCManager*) globals->get_subsystem("atc");
1037                  atc->getATCDialog()->removeEntry(1);
1038             } else {
1039                 cerr << "creading message for " << i->getAircraft()->getCallSign() << endl;
1040                 transmit(&(*i), msgId, msgDir, false);
1041                 return false;
1042             }
1043         }
1044         if (now > startTime) {
1045             //cerr << "Transmitting startup msg" << endl;
1046             transmit(&(*i), msgId, msgDir, true);
1047             i->updateState();
1048             lastTransmission = now;
1049             available = false;
1050             return true;
1051         }
1052     }
1053     return false;
1054 }
1055
1056 void FGStartupController::updateAircraftInformation(int id, double lat, double lon,
1057                                                     double heading, double speed, double alt,
1058                                                     double dt)
1059 {
1060     TrafficVectorIterator i = activeTraffic.begin();
1061     // Search search if the current id has an entry
1062     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1063     TrafficVectorIterator current, closest;
1064     if (activeTraffic.size()) {
1065         //while ((i->getId() != id) && i != activeTraffic.end()) {
1066         while (i != activeTraffic.end()) {
1067             if (i->getId() == id) {
1068                 break;
1069             }
1070             i++;
1071         }
1072     }
1073 //    // update position of the current aircraft
1074
1075     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1076         SG_LOG(SG_GENERAL, SG_ALERT,
1077                "AI error: updating aircraft without traffic record");
1078     } else {
1079         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1080         current = i;
1081     }
1082     setDt(getDt() + dt);
1083
1084     int state = i->getState();
1085
1086     // The user controlled aircraft should have crased here, because it doesn't have a traffic reference.
1087     // NOTE: if we create a traffic schedule for the user aircraft, we can use this to plan a flight.
1088     time_t startTime = i->getAircraft()->getTrafficRef()->getDepartureTime();
1089     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
1090     //cerr << i->getAircraft()->getTrafficRef()->getCallSign()
1091     //     << " is scheduled to depart in " << startTime-now << " seconds. Available = " << available
1092     //     << " at parking " << getGateName(i->getAircraft()) << endl;
1093
1094     if ((now - lastTransmission) > 3 + (rand() % 15)) {
1095         available = true;
1096     }
1097
1098     checkTransmissionState(0, now, (startTime + 0  ), i, MSG_ANNOUNCE_ENGINE_START,                     ATC_AIR_TO_GROUND);
1099     checkTransmissionState(1, now, (startTime + 60 ), i, MSG_REQUEST_ENGINE_START,                      ATC_AIR_TO_GROUND);
1100     checkTransmissionState(2, now, (startTime + 80 ), i, MSG_PERMIT_ENGINE_START,                       ATC_GROUND_TO_AIR);
1101     checkTransmissionState(3, now, (startTime + 100), i, MSG_ACKNOWLEDGE_ENGINE_START,                  ATC_AIR_TO_GROUND);
1102     if (checkTransmissionState(4, now, (startTime + 130), i, MSG_ACKNOWLEDGE_SWITCH_GROUND_FREQUENCY,       ATC_AIR_TO_GROUND)) {
1103         i->nextFrequency();
1104     }
1105     checkTransmissionState(5, now, (startTime + 140), i, MSG_INITIATE_CONTACT,                          ATC_AIR_TO_GROUND);
1106     checkTransmissionState(6, now, (startTime + 150), i, MSG_ACKNOWLEDGE_INITIATE_CONTACT,              ATC_GROUND_TO_AIR);
1107     checkTransmissionState(7, now, (startTime + 180), i, MSG_REQUEST_PUSHBACK_CLEARANCE,                ATC_AIR_TO_GROUND);
1108
1109
1110
1111     if ((state == 8) && available) {
1112         if (now > startTime + 200) {
1113             if (i->pushBackAllowed()) {
1114                 i->allowRepeatedTransmissions();
1115                 transmit(&(*i), MSG_PERMIT_PUSHBACK_CLEARANCE,
1116                          ATC_GROUND_TO_AIR, true);
1117                 i->updateState();
1118             } else {
1119                 transmit(&(*i), MSG_HOLD_PUSHBACK_CLEARANCE,
1120                          ATC_GROUND_TO_AIR, true);
1121                 i->suppressRepeatedTransmissions();
1122             }
1123             lastTransmission = now;
1124             available = false;
1125         }
1126     }
1127     if ((state == 9) && available) {
1128         i->setHoldPosition(false);
1129     }
1130 }
1131
1132
1133 /***************************************************************************
1134  * class FGApproachController
1135  *
1136  **************************************************************************/
1137 FGApproachController::FGApproachController():
1138 FGATCController()
1139 {
1140 }
1141
1142 //
1143 void FGApproachController::announcePosition(int id,
1144                                             FGAIFlightPlan * intendedRoute,
1145                                             int currentPosition,
1146                                             double lat, double lon,
1147                                             double heading, double speed,
1148                                             double alt, double radius,
1149                                             int leg, FGAIAircraft * ref)
1150 {
1151     init();
1152     TrafficVectorIterator i = activeTraffic.begin();
1153     // Search whether the current id alread has an entry
1154     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1155     if (activeTraffic.size()) {
1156         //while ((i->getId() != id) && i != activeTraffic.end()) {
1157         while (i != activeTraffic.end()) {
1158             if (i->getId() == id) {
1159                 break;
1160             }
1161             i++;
1162         }
1163     }
1164     // Add a new TrafficRecord if no one exsists for this aircraft.
1165     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1166         FGTrafficRecord rec;
1167         rec.setId(id);
1168
1169         rec.setPositionAndHeading(lat, lon, heading, speed, alt);
1170         rec.setRunway(intendedRoute->getRunway());
1171         rec.setLeg(leg);
1172         //rec.setCallSign(callsign);
1173         rec.setAircraft(ref);
1174         activeTraffic.push_back(rec);
1175     } else {
1176         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1177     }
1178 }
1179
1180 void FGApproachController::updateAircraftInformation(int id, double lat, double lon,
1181                                                      double heading, double speed, double alt,
1182                                                      double dt)
1183 {
1184     TrafficVectorIterator i = activeTraffic.begin();
1185     // Search search if the current id has an entry
1186     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1187     TrafficVectorIterator current, closest;
1188     if (activeTraffic.size()) {
1189         //while ((i->getId() != id) && i != activeTraffic.end()) {
1190         while (i != activeTraffic.end()) {
1191             if (i->getId() == id) {
1192                 break;
1193             }
1194             i++;
1195         }
1196     }
1197 //    // update position of the current aircraft
1198     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1199         SG_LOG(SG_GENERAL, SG_ALERT,
1200                "AI error: updating aircraft without traffic record");
1201     } else {
1202         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1203         current = i;
1204         //cerr << "ApproachController: checking for speed" << endl;
1205         time_t time_diff =
1206             current->getAircraft()->
1207             checkForArrivalTime(string("final001"));
1208         if (time_diff > 15) {
1209             current->setSpeedAdjustment(current->getAircraft()->
1210                                         getPerformance()->vDescent() *
1211                                         1.35);
1212         } else if (time_diff > 5) {
1213             current->setSpeedAdjustment(current->getAircraft()->
1214                                         getPerformance()->vDescent() *
1215                                         1.2);
1216         } else if (time_diff < -15) {
1217             current->setSpeedAdjustment(current->getAircraft()->
1218                                         getPerformance()->vDescent() *
1219                                         0.65);
1220         } else if (time_diff < -5) {
1221             current->setSpeedAdjustment(current->getAircraft()->
1222                                         getPerformance()->vDescent() *
1223                                         0.8);
1224         } else {
1225             current->clearSpeedAdjustment();
1226         }
1227         //current->setSpeedAdjustment(current->getAircraft()->getPerformance()->vDescent() + time_diff);
1228     }
1229     setDt(getDt() + dt);
1230 }
1231
1232 void FGApproachController::signOff(int id)
1233 {
1234     TrafficVectorIterator i = activeTraffic.begin();
1235     // Search search if the current id alread has an entry
1236     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1237     if (activeTraffic.size()) {
1238         //while ((i->getId() != id) && i != activeTraffic.end()) {
1239         while (i != activeTraffic.end()) {
1240             if (i->getId() == id) {
1241                 break;
1242             }
1243             i++;
1244         }
1245     }
1246     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1247         SG_LOG(SG_GENERAL, SG_ALERT,
1248                "AI error: Aircraft without traffic record is signing off from approach");
1249     } else {
1250         i = activeTraffic.erase(i);
1251     }
1252 }
1253
1254
1255
1256
1257 bool FGApproachController::hasInstruction(int id)
1258 {
1259     TrafficVectorIterator i = activeTraffic.begin();
1260     // Search search if the current id has an entry
1261     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1262     if (activeTraffic.size()) {
1263         //while ((i->getId() != id) && i != activeTraffic.end()) {
1264         while (i != activeTraffic.end()) {
1265             if (i->getId() == id) {
1266                 break;
1267             }
1268             i++;
1269         }
1270     }
1271     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1272         SG_LOG(SG_GENERAL, SG_ALERT,
1273                "AI error: checking ATC instruction for aircraft without traffic record");
1274     } else {
1275         return i->hasInstruction();
1276     }
1277     return false;
1278 }
1279
1280
1281 FGATCInstruction FGApproachController::getInstruction(int id)
1282 {
1283     TrafficVectorIterator i = activeTraffic.begin();
1284     // Search search if the current id has an entry
1285     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1286     if (activeTraffic.size()) {
1287         //while ((i->getId() != id) && i != activeTraffic.end()) {
1288         while (i != activeTraffic.end()) {
1289             if (i->getId() == id) {
1290                 break;
1291             }
1292             i++;
1293         }
1294     }
1295     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1296         SG_LOG(SG_GENERAL, SG_ALERT,
1297                "AI error: requesting ATC instruction for aircraft without traffic record");
1298     } else {
1299         return i->getInstruction();
1300     }
1301     return FGATCInstruction();
1302 }
1303
1304
1305 ActiveRunway *FGApproachController::getRunway(string name)
1306 {
1307     ActiveRunwayVecIterator rwy = activeRunways.begin();
1308     if (activeRunways.size()) {
1309         while (rwy != activeRunways.end()) {
1310             if (rwy->getRunwayName() == name) {
1311                 break;
1312             }
1313             rwy++;
1314         }
1315     }
1316     if (rwy == activeRunways.end()) {
1317         ActiveRunway aRwy(name, 0);
1318         activeRunways.push_back(aRwy);
1319         rwy = activeRunways.end() - 1;
1320     }
1321     return &(*rwy);
1322 }