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     double course, az2, dist;
 403     SGGeod curr(SGGeod::fromDegM(getLongitude(),
 404                                  getLatitude(), getAltitude()));
 405
 406     double userLatitude = fgGetDouble("/position/latitude-deg");
 407     double userLongitude = fgGetDouble("/position/longitude-deg");
 408     SGGeod user(SGGeod::fromDeg(userLongitude, userLatitude));
 409     SGGeodesy::inverse(curr, user, course, az2, dist);
 410     //cerr << "Distance to user : " << dist << endl;
 411     return (dist > 250);
 412
 413 }
 414
 415
 416
 417 /***************************************************************************
 418  * FGATCInstruction
 419  *
 420  **************************************************************************/
 421 FGATCInstruction::FGATCInstruction()
 422 {
 423     holdPattern = false;
 424     holdPosition = false;
 425     changeSpeed = false;
 426     changeHeading = false;
 427     changeAltitude = false;
 428     resolveCircularWait = false;
 429
 430     speed = 0;
 431     heading = 0;
 432     alt = 0;
 433 }
 434
 435
 436 bool FGATCInstruction::hasInstruction()
 437 {
 438     return (holdPattern || holdPosition || changeSpeed || changeHeading
 439             || changeAltitude || resolveCircularWait);
 440 }
 441
 442 /***************************************************************************
 443  * FGATCController
 444  *
 445  **************************************************************************/
 446
 447
 448
 449
 450 FGATCController::FGATCController()
 451 {
 452     cerr << "running FGATController constructor" << endl;
 453     dt_count = 0;
 454     available = true;
 455     lastTransmission = 0;
 456     initialized = false;
 457 }
 458
 459 FGATCController::~FGATCController()
 460 {
 461      cerr << "running FGATController destructor" << endl;
 462 }
 463
 464 string FGATCController::getGateName(FGAIAircraft * ref)
 465 {
 466     return ref->atGate();
 467 }
 468
 469 bool FGATCController::isUserAircraft(FGAIAircraft* ac)
 470 {
 471     return (ac->getCallSign() == fgGetString("/sim/multiplay/callsign")) ? true : false;
 472 };
 473
 474 void FGATCController::transmit(FGTrafficRecord * rec, AtcMsgId msgId,
 475                                AtcMsgDir msgDir, bool audible)
 476 {
 477     string sender, receiver;
 478     int stationFreq = 0;
 479     int taxiFreq = 0;
 480     int freqId = 0;
 481     string atisInformation;
 482     string text;
 483     string taxiFreqStr;
 484     double heading = 0;
 485     string activeRunway;
 486     string fltType;
 487     string rwyClass;
 488     string SID;
 489     string transponderCode;
 490     FGAIFlightPlan *fp;
 491     string fltRules;
 492
 493     //double commFreqD;
 494     sender = rec->getAircraft()->getTrafficRef()->getCallSign();
 495     //cerr << "transmitting for: " << sender << "Leg = " << rec->getLeg() << endl;
 496     switch (rec->getLeg()) {
 497     case 2:
 498     case 3:
 499         freqId = rec->getNextFrequency();
 500         stationFreq =
 501             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 502             getDynamics()->getGroundFrequency(rec->getLeg() + freqId);
 503         taxiFreq =
 504             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 505             getDynamics()->getGroundFrequency(3);
 506         receiver =
 507             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 508             getName() + "-Ground";
 509         atisInformation =
 510             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 511             getDynamics()->getAtisInformation();
 512         break;
 513     case 4:
 514         receiver =
 515             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 516             getName() + "-Tower";
 517         break;
 518     }
 519     // Swap sender and receiver value in case of a ground to air transmission
 520     if (msgDir == ATC_GROUND_TO_AIR) {
 521         string tmp = sender;
 522         sender = receiver;
 523         receiver = tmp;
 524     }
 525     switch (msgId) {
 526     case MSG_ANNOUNCE_ENGINE_START:
 527         text = sender + ". Ready to Start up";
 528         break;
 529     case MSG_REQUEST_ENGINE_START:
 530         text =
 531             receiver + ", This is " + sender + ". Position " +
 532             getGateName(rec->getAircraft()) + ". Information " +
 533             atisInformation + ". " +
 534             rec->getAircraft()->getTrafficRef()->getFlightRules() +
 535             " to " +
 536             rec->getAircraft()->getTrafficRef()->getArrivalAirport()->
 537             getName() + ". Request start-up";
 538         break;
 539         // Acknowledge engine startup permission
 540         // Assign departure runway
 541         // Assign SID, if necessery (TODO)
 542     case MSG_PERMIT_ENGINE_START:
 543         taxiFreqStr = formatATCFrequency3_2(taxiFreq);
 544
 545         heading = rec->getAircraft()->getTrafficRef()->getCourse();
 546         fltType = rec->getAircraft()->getTrafficRef()->getFlightType();
 547         rwyClass =
 548             rec->getAircraft()->GetFlightPlan()->
 549             getRunwayClassFromTrafficType(fltType);
 550
 551         rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 552             getDynamics()->getActiveRunway(rwyClass, 1, activeRunway,
 553                                            heading);
 554         rec->getAircraft()->GetFlightPlan()->setRunway(activeRunway);
 555         fp = rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 556             getDynamics()->getSID(activeRunway, heading);
 557         rec->getAircraft()->GetFlightPlan()->setSID(fp);
 558         if (fp) {
 559             SID = fp->getName() + " departure";
 560         } else {
 561             SID = "fly runway heading ";
 562         }
 563         //snprintf(buffer, 7, "%3.2f", heading);
 564         fltRules = rec->getAircraft()->getTrafficRef()->getFlightRules();
 565         transponderCode = genTransponderCode(fltRules);
 566         rec->getAircraft()->SetTransponderCode(transponderCode);
 567         text =
 568             receiver + ". Start-up approved. " + atisInformation +
 569             " correct, runway " + activeRunway + ", " + SID + ", squawk " +
 570             transponderCode + ". " +
 571             "For push-back and taxi clearance call " + taxiFreqStr + ". " +
 572             sender + " control.";
 573         break;
 574     case MSG_DENY_ENGINE_START:
 575         text = receiver + ". Standby";
 576         break;
 577     case MSG_ACKNOWLEDGE_ENGINE_START:
 578         fp = rec->getAircraft()->GetFlightPlan()->getSID();
 579         if (fp) {
 580             SID =
 581                 rec->getAircraft()->GetFlightPlan()->getSID()->getName() +
 582                 " departure";
 583         } else {
 584             SID = "fly runway heading ";
 585         }
 586         taxiFreqStr = formatATCFrequency3_2(taxiFreq);
 587         activeRunway = rec->getAircraft()->GetFlightPlan()->getRunway();
 588         transponderCode = rec->getAircraft()->GetTransponderCode();
 589         text =
 590             receiver + ". Start-up approved. " + atisInformation +
 591             " correct, runway " + activeRunway + ", " + SID + ", squawk " +
 592             transponderCode + ". " +
 593             "For push-back and taxi clearance call " + taxiFreqStr + ". " +
 594             sender;
 595         break;
 596     case MSG_ACKNOWLEDGE_SWITCH_GROUND_FREQUENCY:
 597         taxiFreqStr = formatATCFrequency3_2(taxiFreq);
 598         text = receiver + ". Switching to " + taxiFreqStr + ". " + sender;
 599         break;
 600     case MSG_INITIATE_CONTACT:
 601         text = receiver + ". With you. " + sender;
 602         break;
 603     case MSG_ACKNOWLEDGE_INITIATE_CONTACT:
 604         text = receiver + ". Roger. " + sender;
 605         break;
 606     case MSG_REQUEST_PUSHBACK_CLEARANCE:
 607         text = receiver + ". Request push-back. " + sender;
 608         break;
 609     case MSG_PERMIT_PUSHBACK_CLEARANCE:
 610         text = receiver + ". Push-back approved. " + sender;
 611         break;
 612     case MSG_HOLD_PUSHBACK_CLEARANCE:
 613         text = receiver + ". Standby. " + sender;
 614         break;
 615     case MSG_REQUEST_TAXI_CLEARANCE:
 616         text = receiver + ". Ready to Taxi. " + sender;
 617         break;
 618     case MSG_ISSUE_TAXI_CLEARANCE:
 619         text = receiver + ". Cleared to taxi. " + sender;
 620         break;
 621     case MSG_ACKNOWLEDGE_TAXI_CLEARANCE:
 622         text = receiver + ". Cleared to taxi. " + sender;
 623         break;
 624     case MSG_HOLD_POSITION:
 625         text = receiver + ". Hold Position. " + sender;
 626         break;
 627     case MSG_ACKNOWLEDGE_HOLD_POSITION:
 628         text = receiver + ". Holding Position. " + sender;
 629         break;
 630     case MSG_RESUME_TAXI:
 631         text = receiver + ". Resume Taxiing. " + sender;
 632         break;
 633     case MSG_ACKNOWLEDGE_RESUME_TAXI:
 634         text = receiver + ". Continuing Taxi. " + sender;
 635         break;
 636     default:
 637         text = text + sender + ". Transmitting unknown Message";
 638         break;
 639     }
 640     if (audible) {
 641         double onBoardRadioFreq0 =
 642             fgGetDouble("/instrumentation/comm[0]/frequencies/selected-mhz");
 643         double onBoardRadioFreq1 =
 644             fgGetDouble("/instrumentation/comm[1]/frequencies/selected-mhz");
 645         int onBoardRadioFreqI0 = (int) floor(onBoardRadioFreq0 * 100 + 0.5);
 646         int onBoardRadioFreqI1 = (int) floor(onBoardRadioFreq1 * 100 + 0.5);
 647         //cerr << "Using " << onBoardRadioFreq0 << ", " << onBoardRadioFreq1 << " and " << stationFreq << " for " << text << endl;
 648
 649         // Display ATC message only when one of the radios is tuned
 650         // the relevant frequency.
 651         // Note that distance attenuation is currently not yet implemented
 652         if ((onBoardRadioFreqI0 == stationFreq)
 653             || (onBoardRadioFreqI1 == stationFreq)) {
 654             if (rec->allowTransmissions()) {
 655                 fgSetString("/sim/messages/atc", text.c_str());
 656             }
 657         }
 658     } else {
 659         FGATCManager *atc = (FGATCManager*) globals->get_subsystem("atc");
 660         atc->getATCDialog()->addEntry(1, text);
 661
 662     }
 663 }
 664
 665 string FGATCController::formatATCFrequency3_2(int freq)
 666 {
 667     char buffer[7];
 668     snprintf(buffer, 7, "%3.2f", ((float) freq / 100.0));
 669     return string(buffer);
 670 }
 671
 672 // TODO: Set transponder codes according to real-world routes.
 673 // The current version just returns a random string of four octal numbers.
 674 string FGATCController::genTransponderCode(string fltRules)
 675 {
 676     if (fltRules == "VFR") {
 677         return string("1200");
 678     } else {
 679         char buffer[5];
 680         snprintf(buffer, 5, "%d%d%d%d", rand() % 8, rand() % 8, rand() % 8,
 681                  rand() % 8);
 682         return string(buffer);
 683     }
 684 }
 685
 686 void FGATCController::init()
 687 {
 688    if (!initialized) {
 689        FGATCManager *mgr = (FGATCManager*) globals->get_subsystem("ATC");
 690        mgr->addController(this);
 691        initialized = true;
 692     }
 693 }
 694
 695 /***************************************************************************
 696  * class FGTowerController
 697  *
 698  **************************************************************************/
 699 FGTowerController::FGTowerController():
 700 FGATCController()
 701 {
 702 }
 703
 704 //
 705 void FGTowerController::announcePosition(int id,
 706                                          FGAIFlightPlan * intendedRoute,
 707                                          int currentPosition, double lat,
 708                                          double lon, double heading,
 709                                          double speed, double alt,
 710                                          double radius, int leg,
 711                                          FGAIAircraft * ref)
 712 {
 713     init();
 714     TrafficVectorIterator i = activeTraffic.begin();
 715     // Search whether the current id alread has an entry
 716     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 717     if (activeTraffic.size()) {
 718         //while ((i->getId() != id) && i != activeTraffic.end()) {
 719         while (i != activeTraffic.end()) {
 720             if (i->getId() == id) {
 721                 break;
 722             }
 723             i++;
 724         }
 725     }
 726     // Add a new TrafficRecord if no one exsists for this aircraft.
 727     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 728         FGTrafficRecord rec;
 729         rec.setId(id);
 730
 731         rec.setPositionAndHeading(lat, lon, heading, speed, alt);
 732         rec.setRunway(intendedRoute->getRunway());
 733         rec.setLeg(leg);
 734         //rec.setCallSign(callsign);
 735         rec.setAircraft(ref);
 736         activeTraffic.push_back(rec);
 737     } else {
 738         i->setPositionAndHeading(lat, lon, heading, speed, alt);
 739     }
 740 }
 741
 742 void FGTowerController::updateAircraftInformation(int id, double lat, double lon,
 743                                                   double heading, double speed, double alt,
 744                                                   double dt)
 745 {
 746     TrafficVectorIterator i = activeTraffic.begin();
 747     // Search whether the current id has an entry
 748     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 749     TrafficVectorIterator current, closest;
 750     if (activeTraffic.size()) {
 751         //while ((i->getId() != id) && i != activeTraffic.end()) {
 752         while (i != activeTraffic.end()) {
 753             if (i->getId() == id) {
 754                 break;
 755             }
 756             i++;
 757         }
 758     }
 759 //    // update position of the current aircraft
 760     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 761         SG_LOG(SG_GENERAL, SG_ALERT,
 762                "AI error: updating aircraft without traffic record");
 763     } else {
 764         i->setPositionAndHeading(lat, lon, heading, speed, alt);
 765         current = i;
 766     }
 767     setDt(getDt() + dt);
 768
 769 //    // see if we already have a clearance record for the currently active runway
 770     ActiveRunwayVecIterator rwy = activeRunways.begin();
 771     // again, a map might be more efficient here
 772     if (activeRunways.size()) {
 773         //while ((rwy->getRunwayName() != current->getRunway()) && (rwy != activeRunways.end())) {
 774         while (rwy != activeRunways.end()) {
 775             if (rwy->getRunwayName() == current->getRunway()) {
 776                 break;
 777             }
 778             rwy++;
 779         }
 780     }
 781     if (rwy == activeRunways.end()) {
 782         ActiveRunway aRwy(current->getRunway(), id);
 783         activeRunways.push_back(aRwy);  // Since there are no clearance records for this runway yet
 784         current->setHoldPosition(false);        // Clear the current aircraft to continue
 785     } else {
 786         // Okay, we have a clearance record for this runway, so check
 787         // whether the clearence ID matches that of the current aircraft
 788         if (id == rwy->getCleared()) {
 789             current->setHoldPosition(false);
 790         } else {
 791             current->setHoldPosition(true);
 792         }
 793     }
 794 }
 795
 796
 797 void FGTowerController::signOff(int id)
 798 {
 799     TrafficVectorIterator i = activeTraffic.begin();
 800     // Search search if the current id alread has an entry
 801     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 802     if (activeTraffic.size()) {
 803         //while ((i->getId() != id) && i != activeTraffic.end()) {
 804         while (i != activeTraffic.end()) {
 805             if (i->getId() == id) {
 806                 break;
 807             }
 808             i++;
 809         }
 810     }
 811     // If this aircraft has left the runway, we can clear the departure record for this runway
 812     ActiveRunwayVecIterator rwy = activeRunways.begin();
 813     if (activeRunways.size()) {
 814         //while ((rwy->getRunwayName() != i->getRunway()) && (rwy != activeRunways.end())) {
 815         while (rwy != activeRunways.end()) {
 816             if (rwy->getRunwayName() == i->getRunway()) {
 817                 break;
 818             }
 819             rwy++;
 820         }
 821         if (rwy != activeRunways.end()) {
 822             rwy = activeRunways.erase(rwy);
 823         } else {
 824             SG_LOG(SG_GENERAL, SG_ALERT,
 825                    "AI error: Attempting to erase non-existing runway clearance record in FGTowerController::signoff");
 826         }
 827     }
 828     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 829         SG_LOG(SG_GENERAL, SG_ALERT,
 830                "AI error: Aircraft without traffic record is signing off from tower");
 831     } else {
 832         i = activeTraffic.erase(i);
 833     }
 834 }
 835
 836 // NOTE:
 837 // IF WE MAKE TRAFFICRECORD A MEMBER OF THE BASE CLASS
 838 // THE FOLLOWING THREE FUNCTIONS: SIGNOFF, HAS INSTRUCTION AND GETINSTRUCTION CAN
 839 // BECOME DEVIRTUALIZED AND BE A MEMBER OF THE BASE ATCCONTROLLER CLASS
 840 // WHICH WOULD SIMPLIFY CODE MAINTENANCE.
 841 // Note that this function is probably obsolete
 842 bool FGTowerController::hasInstruction(int id)
 843 {
 844     TrafficVectorIterator i = activeTraffic.begin();
 845     // Search search if the current id has an entry
 846     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 847     if (activeTraffic.size()) {
 848         //while ((i->getId() != id) && i != activeTraffic.end()) {
 849         while (i != activeTraffic.end()) {
 850             if (i->getId() == id) {
 851                 break;
 852             }
 853             i++;
 854         }
 855     }
 856     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 857         SG_LOG(SG_GENERAL, SG_ALERT,
 858                "AI error: checking ATC instruction for aircraft without traffic record");
 859     } else {
 860         return i->hasInstruction();
 861     }
 862     return false;
 863 }
 864
 865
 866 FGATCInstruction FGTowerController::getInstruction(int id)
 867 {
 868     TrafficVectorIterator i = activeTraffic.begin();
 869     // Search search if the current id has an entry
 870     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 871     if (activeTraffic.size()) {
 872         //while ((i->getId() != id) && i != activeTraffic.end()) {
 873         while (i != activeTraffic.end()) {
 874             if (i->getId() == id) {
 875                 break;
 876             }
 877             i++;
 878         }
 879     }
 880     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 881         SG_LOG(SG_GENERAL, SG_ALERT,
 882                "AI error: requesting ATC instruction for aircraft without traffic record");
 883     } else {
 884         return i->getInstruction();
 885     }
 886     return FGATCInstruction();
 887 }
 888
 889 /***************************************************************************
 890  * class FGStartupController
 891  *
 892  **************************************************************************/
 893 FGStartupController::FGStartupController():
 894 FGATCController()
 895 {
 896 }
 897
 898 void FGStartupController::announcePosition(int id,
 899                                            FGAIFlightPlan * intendedRoute,
 900                                            int currentPosition, double lat,
 901                                            double lon, double heading,
 902                                            double speed, double alt,
 903                                            double radius, int leg,
 904                                            FGAIAircraft * ref)
 905 {
 906     init();
 907     TrafficVectorIterator i = activeTraffic.begin();
 908     // Search whether the current id alread has an entry
 909     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 910     if (activeTraffic.size()) {
 911         //while ((i->getId() != id) && i != activeTraffic.end()) {
 912         while (i != activeTraffic.end()) {
 913             if (i->getId() == id) {
 914                 break;
 915             }
 916             i++;
 917         }
 918     }
 919     // Add a new TrafficRecord if no one exsists for this aircraft.
 920     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 921         FGTrafficRecord rec;
 922         rec.setId(id);
 923
 924         rec.setPositionAndHeading(lat, lon, heading, speed, alt);
 925         rec.setRunway(intendedRoute->getRunway());
 926         rec.setLeg(leg);
 927         //rec.setCallSign(callsign);
 928         rec.setAircraft(ref);
 929         rec.setHoldPosition(true);
 930         activeTraffic.push_back(rec);
 931     } else {
 932         i->setPositionAndHeading(lat, lon, heading, speed, alt);
 933
 934     }
 935 }
 936
 937 // NOTE:
 938 // IF WE MAKE TRAFFICRECORD A MEMBER OF THE BASE CLASS
 939 // THE FOLLOWING THREE FUNCTIONS: SIGNOFF, HAS INSTRUCTION AND GETINSTRUCTION CAN
 940 // BECOME DEVIRTUALIZED AND BE A MEMBER OF THE BASE ATCCONTROLLER CLASS
 941 // WHICH WOULD SIMPLIFY CODE MAINTENANCE.
 942 // Note that this function is probably obsolete
 943 bool FGStartupController::hasInstruction(int id)
 944 {
 945     TrafficVectorIterator i = activeTraffic.begin();
 946     // Search search if the current id has an entry
 947     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 948     if (activeTraffic.size()) {
 949         //while ((i->getId() != id) && i != activeTraffic.end()) {
 950         while (i != activeTraffic.end()) {
 951             if (i->getId() == id) {
 952                 break;
 953             }
 954             i++;
 955         }
 956     }
 957     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 958         SG_LOG(SG_GENERAL, SG_ALERT,
 959                "AI error: checking ATC instruction for aircraft without traffic record");
 960     } else {
 961         return i->hasInstruction();
 962     }
 963     return false;
 964 }
 965
 966
 967 FGATCInstruction FGStartupController::getInstruction(int id)
 968 {
 969     TrafficVectorIterator i = activeTraffic.begin();
 970     // Search search if the current id has an entry
 971     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 972     if (activeTraffic.size()) {
 973         //while ((i->getId() != id) && i != activeTraffic.end()) {
 974         while (i != activeTraffic.end()) {
 975             if (i->getId() == id) {
 976                 break;
 977             }
 978             i++;
 979         }
 980     }
 981     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
 982         SG_LOG(SG_GENERAL, SG_ALERT,
 983                "AI error: requesting ATC instruction for aircraft without traffic record");
 984     } else {
 985         return i->getInstruction();
 986     }
 987     return FGATCInstruction();
 988 }
 989
 990 void FGStartupController::signOff(int id)
 991 {
 992     TrafficVectorIterator i = activeTraffic.begin();
 993     // Search search if the current id alread has an entry
 994     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 995     if (activeTraffic.size()) {
 996         //while ((i->getId() != id) && i != activeTraffic.end()) {
 997         while (i != activeTraffic.end()) {
 998             if (i->getId() == id) {
 999                 break;
1000             }
1001             i++;
1002         }
1003     }
1004     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1005         SG_LOG(SG_GENERAL, SG_ALERT,
1006                "AI error: Aircraft without traffic record is signing off from tower");
1007     } else {
1008         i = activeTraffic.erase(i);
1009     }
1010 }
1011
1012 bool FGStartupController::checkTransmissionState(int st, time_t now, time_t startTime, TrafficVectorIterator i, AtcMsgId msgId,
1013                                AtcMsgDir msgDir)
1014 {
1015     int state = i->getState();
1016     if ((state == st) && available) {
1017         if ((msgDir == ATC_AIR_TO_GROUND) && isUserAircraft(i->getAircraft())) {
1018
1019             cerr << "Checking state " << st << " for " << i->getAircraft()->getCallSign() << endl;
1020             static SGPropertyNode_ptr trans_num = globals->get_props()->getNode("/sim/atc/transmission-num", true);
1021             int n = trans_num->getIntValue();
1022             if (n >= 0) {
1023                 trans_num->setIntValue(-1);
1024                  // PopupCallback(n);
1025                  cerr << "Selected transmission message" << n << endl;
1026             } else {
1027                 cerr << "creading message for " << i->getAircraft()->getCallSign() << endl;
1028                 transmit(&(*i), msgId, msgDir, false);
1029                 return false;
1030             }
1031         }
1032         if (now > startTime) {
1033             //cerr << "Transmitting startup msg" << endl;
1034             transmit(&(*i), msgId, msgDir, true);
1035             i->updateState();
1036             lastTransmission = now;
1037             available = false;
1038             return true;
1039         }
1040     }
1041     return false;
1042 }
1043
1044 void FGStartupController::updateAircraftInformation(int id, double lat, double lon,
1045                                                     double heading, double speed, double alt,
1046                                                     double dt)
1047 {
1048     TrafficVectorIterator i = activeTraffic.begin();
1049     // Search search if the current id has an entry
1050     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1051     TrafficVectorIterator current, closest;
1052     if (activeTraffic.size()) {
1053         //while ((i->getId() != id) && i != activeTraffic.end()) {
1054         while (i != activeTraffic.end()) {
1055             if (i->getId() == id) {
1056                 break;
1057             }
1058             i++;
1059         }
1060     }
1061 //    // update position of the current aircraft
1062
1063     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1064         SG_LOG(SG_GENERAL, SG_ALERT,
1065                "AI error: updating aircraft without traffic record");
1066     } else {
1067         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1068         current = i;
1069     }
1070     setDt(getDt() + dt);
1071
1072     int state = i->getState();
1073
1074     // The user controlled aircraft should have crased here, because it doesn't have a traffic reference.
1075     // NOTE: if we create a traffic schedule for the user aircraft, we can use this to plan a flight.
1076     time_t startTime = i->getAircraft()->getTrafficRef()->getDepartureTime();
1077     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
1078     //cerr << i->getAircraft()->getTrafficRef()->getCallSign()
1079     //     << " is scheduled to depart in " << startTime-now << " seconds. Available = " << available
1080     //     << " at parking " << getGateName(i->getAircraft()) << endl;
1081
1082     if ((now - lastTransmission) > 3 + (rand() % 15)) {
1083         available = true;
1084     }
1085
1086     checkTransmissionState(0, now, (startTime + 0  ), i, MSG_ANNOUNCE_ENGINE_START,                     ATC_AIR_TO_GROUND);
1087     checkTransmissionState(1, now, (startTime + 60 ), i, MSG_REQUEST_ENGINE_START,                      ATC_AIR_TO_GROUND);
1088     checkTransmissionState(2, now, (startTime + 80 ), i, MSG_PERMIT_ENGINE_START,                       ATC_GROUND_TO_AIR);
1089     checkTransmissionState(3, now, (startTime + 100), i, MSG_ACKNOWLEDGE_ENGINE_START,                  ATC_AIR_TO_GROUND);
1090     if (checkTransmissionState(4, now, (startTime + 130), i, MSG_ACKNOWLEDGE_SWITCH_GROUND_FREQUENCY,       ATC_AIR_TO_GROUND)) {
1091         i->nextFrequency();
1092     }
1093     checkTransmissionState(5, now, (startTime + 140), i, MSG_INITIATE_CONTACT,                          ATC_AIR_TO_GROUND);
1094     checkTransmissionState(6, now, (startTime + 150), i, MSG_ACKNOWLEDGE_INITIATE_CONTACT,              ATC_GROUND_TO_AIR);
1095
1096
1097
1098     if ((state == 8) && available) {
1099         if (now > startTime + 200) {
1100             if (i->pushBackAllowed()) {
1101                 i->allowRepeatedTransmissions();
1102                 transmit(&(*i), MSG_PERMIT_PUSHBACK_CLEARANCE,
1103                          ATC_GROUND_TO_AIR, true);
1104                 i->updateState();
1105             } else {
1106                 transmit(&(*i), MSG_HOLD_PUSHBACK_CLEARANCE,
1107                          ATC_GROUND_TO_AIR, true);
1108                 i->suppressRepeatedTransmissions();
1109             }
1110             lastTransmission = now;
1111             available = false;
1112         }
1113     }
1114     if ((state == 9) && available) {
1115         i->setHoldPosition(false);
1116     }
1117 }
1118
1119
1120 /***************************************************************************
1121  * class FGApproachController
1122  *
1123  **************************************************************************/
1124 FGApproachController::FGApproachController():
1125 FGATCController()
1126 {
1127 }
1128
1129 //
1130 void FGApproachController::announcePosition(int id,
1131                                             FGAIFlightPlan * intendedRoute,
1132                                             int currentPosition,
1133                                             double lat, double lon,
1134                                             double heading, double speed,
1135                                             double alt, double radius,
1136                                             int leg, FGAIAircraft * ref)
1137 {
1138     init();
1139     TrafficVectorIterator i = activeTraffic.begin();
1140     // Search whether the current id alread has an entry
1141     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1142     if (activeTraffic.size()) {
1143         //while ((i->getId() != id) && i != activeTraffic.end()) {
1144         while (i != activeTraffic.end()) {
1145             if (i->getId() == id) {
1146                 break;
1147             }
1148             i++;
1149         }
1150     }
1151     // Add a new TrafficRecord if no one exsists for this aircraft.
1152     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1153         FGTrafficRecord rec;
1154         rec.setId(id);
1155
1156         rec.setPositionAndHeading(lat, lon, heading, speed, alt);
1157         rec.setRunway(intendedRoute->getRunway());
1158         rec.setLeg(leg);
1159         //rec.setCallSign(callsign);
1160         rec.setAircraft(ref);
1161         activeTraffic.push_back(rec);
1162     } else {
1163         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1164     }
1165 }
1166
1167 void FGApproachController::updateAircraftInformation(int id, double lat, double lon,
1168                                                      double heading, double speed, double alt,
1169                                                      double dt)
1170 {
1171     TrafficVectorIterator i = activeTraffic.begin();
1172     // Search search if the current id has an entry
1173     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1174     TrafficVectorIterator current, closest;
1175     if (activeTraffic.size()) {
1176         //while ((i->getId() != id) && i != activeTraffic.end()) {
1177         while (i != activeTraffic.end()) {
1178             if (i->getId() == id) {
1179                 break;
1180             }
1181             i++;
1182         }
1183     }
1184 //    // update position of the current aircraft
1185     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1186         SG_LOG(SG_GENERAL, SG_ALERT,
1187                "AI error: updating aircraft without traffic record");
1188     } else {
1189         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1190         current = i;
1191         //cerr << "ApproachController: checking for speed" << endl;
1192         time_t time_diff =
1193             current->getAircraft()->
1194             checkForArrivalTime(string("final001"));
1195         if (time_diff > 15) {
1196             current->setSpeedAdjustment(current->getAircraft()->
1197                                         getPerformance()->vDescent() *
1198                                         1.35);
1199         } else if (time_diff > 5) {
1200             current->setSpeedAdjustment(current->getAircraft()->
1201                                         getPerformance()->vDescent() *
1202                                         1.2);
1203         } else if (time_diff < -15) {
1204             current->setSpeedAdjustment(current->getAircraft()->
1205                                         getPerformance()->vDescent() *
1206                                         0.65);
1207         } else if (time_diff < -5) {
1208             current->setSpeedAdjustment(current->getAircraft()->
1209                                         getPerformance()->vDescent() *
1210                                         0.8);
1211         } else {
1212             current->clearSpeedAdjustment();
1213         }
1214         //current->setSpeedAdjustment(current->getAircraft()->getPerformance()->vDescent() + time_diff);
1215     }
1216     setDt(getDt() + dt);
1217 }
1218
1219 void FGApproachController::signOff(int id)
1220 {
1221     TrafficVectorIterator i = activeTraffic.begin();
1222     // Search search if the current id alread has an entry
1223     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1224     if (activeTraffic.size()) {
1225         //while ((i->getId() != id) && i != activeTraffic.end()) {
1226         while (i != activeTraffic.end()) {
1227             if (i->getId() == id) {
1228                 break;
1229             }
1230             i++;
1231         }
1232     }
1233     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1234         SG_LOG(SG_GENERAL, SG_ALERT,
1235                "AI error: Aircraft without traffic record is signing off from approach");
1236     } else {
1237         i = activeTraffic.erase(i);
1238     }
1239 }
1240
1241
1242
1243
1244 bool FGApproachController::hasInstruction(int id)
1245 {
1246     TrafficVectorIterator i = activeTraffic.begin();
1247     // Search search if the current id has an entry
1248     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1249     if (activeTraffic.size()) {
1250         //while ((i->getId() != id) && i != activeTraffic.end()) {
1251         while (i != activeTraffic.end()) {
1252             if (i->getId() == id) {
1253                 break;
1254             }
1255             i++;
1256         }
1257     }
1258     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1259         SG_LOG(SG_GENERAL, SG_ALERT,
1260                "AI error: checking ATC instruction for aircraft without traffic record");
1261     } else {
1262         return i->hasInstruction();
1263     }
1264     return false;
1265 }
1266
1267
1268 FGATCInstruction FGApproachController::getInstruction(int id)
1269 {
1270     TrafficVectorIterator i = activeTraffic.begin();
1271     // Search search if the current id has an entry
1272     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1273     if (activeTraffic.size()) {
1274         //while ((i->getId() != id) && i != activeTraffic.end()) {
1275         while (i != activeTraffic.end()) {
1276             if (i->getId() == id) {
1277                 break;
1278             }
1279             i++;
1280         }
1281     }
1282     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1283         SG_LOG(SG_GENERAL, SG_ALERT,
1284                "AI error: requesting ATC instruction for aircraft without traffic record");
1285     } else {
1286         return i->getInstruction();
1287     }
1288     return FGATCInstruction();
1289 }
1290
1291
1292 ActiveRunway *FGApproachController::getRunway(string name)
1293 {
1294     ActiveRunwayVecIterator rwy = activeRunways.begin();
1295     if (activeRunways.size()) {
1296         while (rwy != activeRunways.end()) {
1297             if (rwy->getRunwayName() == name) {
1298                 break;
1299             }
1300             rwy++;
1301         }
1302     }
1303     if (rwy == activeRunways.end()) {
1304         ActiveRunway aRwy(name, 0);
1305         activeRunways.push_back(aRwy);
1306         rwy = activeRunways.end() - 1;
1307     }
1308     return &(*rwy);
1309 }