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 #include <math.h>
  29 #include <stdlib.h>
  30 #include <deque>
  31
  32 #include <osg/Geode>
  33 #include <osg/Geometry>
  34 #include <osg/MatrixTransform>
  35 #include <osg/Shape>
  36
  37 #include <simgear/scene/material/EffectGeode.hxx>
  38 #include <simgear/scene/material/matlib.hxx>
  39 #include <simgear/scene/material/mat.hxx>
  40 #include <Scenery/scenery.hxx>
  41
  42 #include "trafficcontrol.hxx"
  43 #include "atc_mgr.hxx"
  44 #include <AIModel/AIAircraft.hxx>
  45 #include <AIModel/AIFlightPlan.hxx>
  46 #include <AIModel/performancedata.hxx>
  47 #include <AIModel/performancedb.hxx>
  48 #include <ATC/atc_mgr.hxx>
  49 #include <Traffic/TrafficMgr.hxx>
  50 #include <Airports/groundnetwork.hxx>
  51 #include <Airports/dynamics.hxx>
  52 #include <Airports/simple.hxx>
  53 #define WITH_POINT_TO_POINT
  54 #include "itm.cpp"
  55
  56 using std::sort;
  57
  58 /***************************************************************************
  59  * ActiveRunway
  60  **************************************************************************/
  61 time_t ActiveRunway::requestTimeSlot(time_t eta)
  62 {
  63     time_t newEta;
  64     time_t separation = 90;
  65     bool found = false;
  66     if (estimatedArrivalTimes.size() == 0) {
  67         estimatedArrivalTimes.push_back(eta);
  68         return eta;
  69     } else {
  70         TimeVectorIterator i = estimatedArrivalTimes.begin();
  71         //cerr << "Checking eta slots " << eta << ": " << endl;
  72         for (i = estimatedArrivalTimes.begin();
  73              i != estimatedArrivalTimes.end(); i++) {
  74             //cerr << "Stored time : " << (*i) << endl;
  75         }
  76         i = estimatedArrivalTimes.begin();
  77         if ((eta + separation) < (*i)) {
  78             newEta = eta;
  79             found = true;
  80             //cerr << "Storing at beginning" << endl;
  81         }
  82         while ((i != estimatedArrivalTimes.end()) && (!found)) {
  83             TimeVectorIterator j = i + 1;
  84             if (j == estimatedArrivalTimes.end()) {
  85                 if (((*i) + separation) < eta) {
  86                     //cerr << "Storing at end" << endl;
  87                     newEta = eta;
  88                 } else {
  89                     newEta = (*i) + separation;
  90                     //cerr << "Storing at end + separation" << endl;
  91                 }
  92             } else {
  93                 if ((((*j) - (*i)) > (separation * 2))) {       // found a potential slot
  94                     // now check whether this slot is usable:
  95                     // 1) eta should fall between the two points
  96                     //    i.e. eta > i AND eta < j
  97                     //
  98                     //cerr << "Found potential slot after " << (*i) << endl;
  99                     if (eta > (*i) && (eta < (*j))) {
 100                         found = true;
 101                         if (eta < ((*i) + separation)) {
 102                             newEta = (*i) + separation;
 103                             //cerr << "Using  original" << (*i) << " + separation " << endl;
 104                         } else {
 105                             newEta = eta;
 106                             //cerr << "Using original after " << (*i) << endl;
 107                         }
 108                     } else if (eta < (*i)) {
 109                         found = true;
 110                         newEta = (*i) + separation;
 111                         //cerr << "Using delayed slot after " << (*i) << endl;
 112                     }
 113                     /*
 114                        if (((*j) - separation) < eta) {
 115                        found = true;
 116                        if (((*i) + separation) < eta) {
 117                        newEta = eta;
 118                        cerr << "Using original after " << (*i) << endl;
 119                        } else {
 120                        newEta = (*i) + separation;
 121                        cerr << "Using  " << (*i) << " + separation " << endl;
 122                        }
 123                        } */
 124                 }
 125             }
 126             i++;
 127         }
 128     }
 129     //cerr << ". done. New ETA : " << newEta << endl;
 130
 131     estimatedArrivalTimes.push_back(newEta);
 132     sort(estimatedArrivalTimes.begin(), estimatedArrivalTimes.end());
 133     // do some housekeeping : remove any timestamps that are past
 134     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
 135     TimeVectorIterator i = estimatedArrivalTimes.begin();
 136     while (i != estimatedArrivalTimes.end()) {
 137         if ((*i) < now) {
 138             //cerr << "Deleting timestamp " << (*i) << " (now = " << now << "). " << endl;
 139             estimatedArrivalTimes.erase(i);
 140             i = estimatedArrivalTimes.begin();
 141         } else {
 142             i++;
 143         }
 144     }
 145     return newEta;
 146 }
 147
 148 /***************************************************************************
 149  * FGTrafficRecord
 150  **************************************************************************/
 151 FGTrafficRecord::FGTrafficRecord():
 152 id(0), waitsForId(0),
 153 currentPos(0),
 154 leg(0),
 155 frequencyId(0),
 156 state(0),
 157 allowTransmission(true),
 158 latitude(0), longitude(0), heading(0), speed(0), altitude(0), radius(0)
 159 {
 160 }
 161
 162 void FGTrafficRecord::setPositionAndIntentions(int pos,
 163                                                FGAIFlightPlan * route)
 164 {
 165
 166     currentPos = pos;
 167     if (intentions.size()) {
 168         intVecIterator i = intentions.begin();
 169         if ((*i) != pos) {
 170             SG_LOG(SG_GENERAL, SG_ALERT,
 171                    "Error in FGTrafficRecord::setPositionAndIntentions");
 172             //cerr << "Pos : " << pos << " Curr " << *(intentions.begin())  << endl;
 173             for (intVecIterator i = intentions.begin();
 174                  i != intentions.end(); i++) {
 175                 //cerr << (*i) << " ";
 176             }
 177             //cerr << endl;
 178         }
 179         intentions.erase(i);
 180     } else {
 181         //FGAIFlightPlan::waypoint* const wpt= route->getCurrentWaypoint();
 182         int size = route->getNrOfWayPoints();
 183         //cerr << "Setting pos" << pos << " ";
 184         //cerr << "setting intentions ";
 185         for (int i = 0; i < size; i++) {
 186             int val = route->getRouteIndex(i);
 187             //cerr << val<< " ";
 188             if ((val) && (val != pos)) {
 189                 intentions.push_back(val);
 190                 //cerr << "[set] ";
 191             }
 192         }
 193         //cerr << endl;
 194         //while (route->next(&legNr, &routeNr)) {
 195         //intentions.push_back(routeNr);
 196         //}
 197         //route->rewind(currentPos);
 198     }
 199     //exit(1);
 200 }
 201 /**
 202  * Check if another aircraft is ahead of the current one, and on the same
 203  * return true / false is the is/isn't the case.
 204  *
 205  ****************************************************************************/
 206
 207 bool FGTrafficRecord::checkPositionAndIntentions(FGTrafficRecord & other)
 208 {
 209     bool result = false;
 210     //cerr << "Start check 1" << endl;
 211     if (currentPos == other.currentPos) {
 212         //cerr << callsign << ": Check Position and intentions: we are on the same taxiway" << other.callsign << "Index = " << currentPos << endl;
 213         result = true;
 214     }
 215     //  else if (other.intentions.size())
 216     //     {
 217     //       cerr << "Start check 2" << endl;
 218     //       intVecIterator i = other.intentions.begin();
 219     //       while (!((i == other.intentions.end()) || ((*i) == currentPos)))
 220     //     i++;
 221     //       if (i != other.intentions.end()) {
 222     //     cerr << "Check Position and intentions: current matches other.intentions" << endl;
 223     //     result = true;
 224     //       }
 225     else if (intentions.size()) {
 226         //cerr << "Start check 3" << endl;
 227         intVecIterator i = intentions.begin();
 228         //while (!((i == intentions.end()) || ((*i) == other.currentPos)))
 229         while (i != intentions.end()) {
 230             if ((*i) == other.currentPos) {
 231                 break;
 232             }
 233             i++;
 234         }
 235         if (i != intentions.end()) {
 236             //cerr << callsign << ": Check Position and intentions: .other.current matches" << other.callsign << "Index = " << (*i) << endl;
 237             result = true;
 238         }
 239     }
 240     //cerr << "Done !!" << endl;
 241     return result;
 242 }
 243
 244 void FGTrafficRecord::setPositionAndHeading(double lat, double lon,
 245                                             double hdg, double spd,
 246                                             double alt)
 247 {
 248     latitude = lat;
 249     longitude = lon;
 250     heading = hdg;
 251     speed = spd;
 252     altitude = alt;
 253 }
 254
 255 int FGTrafficRecord::crosses(FGGroundNetwork * net,
 256                              FGTrafficRecord & other)
 257 {
 258     if (checkPositionAndIntentions(other)
 259         || (other.checkPositionAndIntentions(*this)))
 260         return -1;
 261     intVecIterator i, j;
 262     int currentTargetNode = 0, otherTargetNode = 0;
 263     if (currentPos > 0)
 264         currentTargetNode = net->findSegment(currentPos)->getEnd()->getIndex(); // OKAY,...
 265     if (other.currentPos > 0)
 266         otherTargetNode = net->findSegment(other.currentPos)->getEnd()->getIndex();     // OKAY,...
 267     if ((currentTargetNode == otherTargetNode) && currentTargetNode > 0)
 268         return currentTargetNode;
 269     if (intentions.size()) {
 270         for (i = intentions.begin(); i != intentions.end(); i++) {
 271             if ((*i) > 0) {
 272                 if ((currentTargetNode ==
 273                      net->findSegment(*i)->getEnd()->getIndex())) {
 274                     //cerr << "Current crosses at " << currentTargetNode <<endl;
 275                     return currentTargetNode;
 276                 }
 277             }
 278         }
 279     }
 280     if (other.intentions.size()) {
 281         for (i = other.intentions.begin(); i != other.intentions.end();
 282              i++) {
 283             if ((*i) > 0) {
 284                 if (otherTargetNode ==
 285                     net->findSegment(*i)->getEnd()->getIndex()) {
 286                     //cerr << "Other crosses at " << currentTargetNode <<endl;
 287                     return otherTargetNode;
 288                 }
 289             }
 290         }
 291     }
 292     if (intentions.size() && other.intentions.size()) {
 293         for (i = intentions.begin(); i != intentions.end(); i++) {
 294             for (j = other.intentions.begin(); j != other.intentions.end();
 295                  j++) {
 296                 //cerr << "finding segment " << *i << " and " << *j << endl;
 297                 if (((*i) > 0) && ((*j) > 0)) {
 298                     currentTargetNode =
 299                         net->findSegment(*i)->getEnd()->getIndex();
 300                     otherTargetNode =
 301                         net->findSegment(*j)->getEnd()->getIndex();
 302                     if (currentTargetNode == otherTargetNode) {
 303                         //cerr << "Routes will cross at " << currentTargetNode << endl;
 304                         return currentTargetNode;
 305                     }
 306                 }
 307             }
 308         }
 309     }
 310     return -1;
 311 }
 312
 313 bool FGTrafficRecord::onRoute(FGGroundNetwork * net,
 314                               FGTrafficRecord & other)
 315 {
 316     int node = -1, othernode = -1;
 317     if (currentPos > 0)
 318         node = net->findSegment(currentPos)->getEnd()->getIndex();
 319     if (other.currentPos > 0)
 320         othernode =
 321             net->findSegment(other.currentPos)->getEnd()->getIndex();
 322     if ((node == othernode) && (node != -1))
 323         return true;
 324     if (other.intentions.size()) {
 325         for (intVecIterator i = other.intentions.begin();
 326              i != other.intentions.end(); i++) {
 327             if (*i > 0) {
 328                 othernode = net->findSegment(*i)->getEnd()->getIndex();
 329                 if ((node == othernode) && (node > -1))
 330                     return true;
 331             }
 332         }
 333     }
 334     //if (other.currentPos > 0)
 335     //  othernode = net->findSegment(other.currentPos)->getEnd()->getIndex();
 336     //if (intentions.size())
 337     //  {
 338     //    for (intVecIterator i = intentions.begin(); i != intentions.end(); i++)
 339     //    {
 340     //      if (*i > 0)
 341     //        {
 342     //          node = net->findSegment(*i)->getEnd()->getIndex();
 343     //          if ((node == othernode) && (node > -1))
 344     //            return true;
 345     //        }
 346     //    }
 347     //  }
 348     return false;
 349 }
 350
 351
 352 bool FGTrafficRecord::isOpposing(FGGroundNetwork * net,
 353                                  FGTrafficRecord & other, int node)
 354 {
 355     // Check if current segment is the reverse segment for the other aircraft
 356     FGTaxiSegment *opp;
 357     //cerr << "Current segment " << currentPos << endl;
 358     if ((currentPos > 0) && (other.currentPos > 0)) {
 359         opp = net->findSegment(currentPos)->opposite();
 360         if (opp) {
 361             if (opp->getIndex() == other.currentPos)
 362                 return true;
 363         }
 364
 365         for (intVecIterator i = intentions.begin(); i != intentions.end();
 366              i++) {
 367             if ((opp = net->findSegment(other.currentPos)->opposite())) {
 368                 if ((*i) > 0)
 369                     if (opp->getIndex() ==
 370                         net->findSegment(*i)->getIndex()) {
 371                         if (net->findSegment(*i)->getStart()->getIndex() ==
 372                             node) {
 373                             {
 374                                 //cerr << "Found the node " << node << endl;
 375                                 return true;
 376                             }
 377                         }
 378                     }
 379             }
 380             if (other.intentions.size()) {
 381                 for (intVecIterator j = other.intentions.begin();
 382                      j != other.intentions.end(); j++) {
 383                     // cerr << "Current segment 1 " << (*i) << endl;
 384                     if ((*i) > 0) {
 385                         if ((opp = net->findSegment(*i)->opposite())) {
 386                             if (opp->getIndex() ==
 387                                 net->findSegment(*j)->getIndex()) {
 388                                 //cerr << "Nodes " << net->findSegment(*i)->getIndex()
 389                                 //   << " and  " << net->findSegment(*j)->getIndex()
 390                                 //   << " are opposites " << endl;
 391                                 if (net->findSegment(*i)->getStart()->
 392                                     getIndex() == node) {
 393                                     {
 394                                         //cerr << "Found the node " << node << endl;
 395                                         return true;
 396                                     }
 397                                 }
 398                             }
 399                         }
 400                     }
 401                 }
 402             }
 403         }
 404     }
 405     return false;
 406 }
 407
 408 void FGTrafficRecord::setSpeedAdjustment(double spd)
 409 {
 410     instruction.setChangeSpeed(true);
 411     instruction.setSpeed(spd);
 412 }
 413
 414 void FGTrafficRecord::setHeadingAdjustment(double heading)
 415 {
 416     instruction.setChangeHeading(true);
 417     instruction.setHeading(heading);
 418 }
 419
 420 bool FGTrafficRecord::pushBackAllowed()
 421 {
 422     // With the user ATC / AI integration, checking whether the user's aircraft is near no longer works, because
 423     // this will effectively block the user's aircraft itself from receiving pushback clearance.
 424     // So, what can we do?
 425     /*
 426     double course, az2, dist;
 427     SGGeod curr(SGGeod::fromDegM(getLongitude(),
 428                                  getLatitude(), getAltitude()));
 429
 430     double userLatitude = fgGetDouble("/position/latitude-deg");
 431     double userLongitude = fgGetDouble("/position/longitude-deg");
 432     SGGeod user(SGGeod::fromDeg(userLongitude, userLatitude));
 433     SGGeodesy::inverse(curr, user, course, az2, dist);
 434     //cerr << "Distance to user : " << dist << endl;
 435     return (dist > 250);
 436     */
 437
 438
 439     // In essence, we should check whether the pusbback route itself, as well as the associcated
 440     // taxiways near the pushback point are free of traffic.
 441     // To do so, we need to
 442     return true;
 443 }
 444
 445
 446
 447 /***************************************************************************
 448  * FGATCInstruction
 449  *
 450  **************************************************************************/
 451 FGATCInstruction::FGATCInstruction()
 452 {
 453     holdPattern = false;
 454     holdPosition = false;
 455     changeSpeed = false;
 456     changeHeading = false;
 457     changeAltitude = false;
 458     resolveCircularWait = false;
 459
 460     speed = 0;
 461     heading = 0;
 462     alt = 0;
 463 }
 464
 465
 466 bool FGATCInstruction::hasInstruction()
 467 {
 468     return (holdPattern || holdPosition || changeSpeed || changeHeading
 469             || changeAltitude || resolveCircularWait);
 470 }
 471
 472 /***************************************************************************
 473  * FGATCController
 474  *
 475  **************************************************************************/
 476
 477
 478
 479
 480 FGATCController::FGATCController()
 481 {
 482     //cerr << "running FGATController constructor" << endl;
 483     dt_count = 0;
 484     available = true;
 485     lastTransmission = 0;
 486     initialized = false;
 487 }
 488
 489 FGATCController::~FGATCController()
 490 {
 491      //cerr << "running FGATController destructor" << endl;
 492 }
 493
 494 string FGATCController::getGateName(FGAIAircraft * ref)
 495 {
 496     return ref->atGate();
 497 }
 498
 499 bool FGATCController::isUserAircraft(FGAIAircraft* ac)
 500 {
 501     return (ac->getCallSign() == fgGetString("/sim/multiplay/callsign")) ? true : false;
 502 };
 503
 504 void FGATCController::transmit(FGTrafficRecord * rec, FGAirportDynamics *parent, AtcMsgId msgId,
 505                                AtcMsgDir msgDir, bool audible)
 506 {
 507     string sender, receiver;
 508     int stationFreq = 0;
 509     int taxiFreq = 0;
 510     int towerFreq = 0;
 511     int freqId = 0;
 512     string atisInformation;
 513     string text;
 514     string taxiFreqStr;
 515     string towerFreqStr;
 516     double heading = 0;
 517     string activeRunway;
 518     string fltType;
 519     string rwyClass;
 520     string SID;
 521     string transponderCode;
 522     FGAIFlightPlan *fp;
 523     string fltRules;
 524     string instructionText;
 525     int ground_to_air=0;
 526
 527     //double commFreqD;
 528     sender = rec->getAircraft()->getTrafficRef()->getCallSign();
 529     if (rec->getAircraft()->getTaxiClearanceRequest()) {
 530         instructionText = "push-back and taxi";
 531     } else {
 532         instructionText = "taxi";
 533     }
 534     //cerr << "transmitting for: " << sender << "Leg = " << rec->getLeg() << endl;
 535     switch (rec->getLeg()) {
 536     case 1:
 537     case 2:
 538         freqId = rec->getNextFrequency();
 539         stationFreq =
 540             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 541             getDynamics()->getGroundFrequency(rec->getLeg() + freqId);
 542         taxiFreq =
 543             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 544             getDynamics()->getGroundFrequency(2);
 545         towerFreq =
 546             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 547             getDynamics()->getTowerFrequency(2);
 548         receiver =
 549             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 550             getName() + "-Ground";
 551         atisInformation =
 552             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 553             getDynamics()->getAtisSequence();
 554         break;
 555     case 3:
 556         receiver =
 557             rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 558             getName() + "-Tower";
 559         break;
 560     }
 561     // Swap sender and receiver value in case of a ground to air transmission
 562     if (msgDir == ATC_GROUND_TO_AIR) {
 563         string tmp = sender;
 564         sender = receiver;
 565         receiver = tmp;
 566         ground_to_air=1;
 567     }
 568     switch (msgId) {
 569     case MSG_ANNOUNCE_ENGINE_START:
 570         text = sender + ". Ready to Start up";
 571         break;
 572     case MSG_REQUEST_ENGINE_START:
 573         text =
 574             receiver + ", This is " + sender + ". Position " +
 575             getGateName(rec->getAircraft()) + ". Information " +
 576             atisInformation + ". " +
 577             rec->getAircraft()->getTrafficRef()->getFlightRules() +
 578             " to " +
 579             rec->getAircraft()->getTrafficRef()->getArrivalAirport()->
 580             getName() + ". Request start-up";
 581         break;
 582         // Acknowledge engine startup permission
 583         // Assign departure runway
 584         // Assign SID, if necessery (TODO)
 585     case MSG_PERMIT_ENGINE_START:
 586         taxiFreqStr = formatATCFrequency3_2(taxiFreq);
 587
 588         heading = rec->getAircraft()->getTrafficRef()->getCourse();
 589         fltType = rec->getAircraft()->getTrafficRef()->getFlightType();
 590         rwyClass =
 591             rec->getAircraft()->GetFlightPlan()->
 592             getRunwayClassFromTrafficType(fltType);
 593
 594         rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 595             getDynamics()->getActiveRunway(rwyClass, 1, activeRunway,
 596                                            heading);
 597         rec->getAircraft()->GetFlightPlan()->setRunway(activeRunway);
 598         fp = rec->getAircraft()->getTrafficRef()->getDepartureAirport()->
 599             getDynamics()->getSID(activeRunway, heading);
 600         rec->getAircraft()->GetFlightPlan()->setSID(fp);
 601         if (fp) {
 602             SID = fp->getName() + " departure";
 603         } else {
 604             SID = "fly runway heading ";
 605         }
 606         //snprintf(buffer, 7, "%3.2f", heading);
 607         fltRules = rec->getAircraft()->getTrafficRef()->getFlightRules();
 608         transponderCode = genTransponderCode(fltRules);
 609         rec->getAircraft()->SetTransponderCode(transponderCode);
 610         text =
 611             receiver + ". Start-up approved. " + atisInformation +
 612             " correct, runway " + activeRunway + ", " + SID + ", squawk " +
 613             transponderCode + ". " +
 614             "For "+ instructionText + " clearance call " + taxiFreqStr + ". " +
 615             sender + " control.";
 616         break;
 617     case MSG_DENY_ENGINE_START:
 618         text = receiver + ". Standby";
 619         break;
 620     case MSG_ACKNOWLEDGE_ENGINE_START:
 621         fp = rec->getAircraft()->GetFlightPlan()->getSID();
 622         if (fp) {
 623             SID =
 624                 rec->getAircraft()->GetFlightPlan()->getSID()->getName() +
 625                 " departure";
 626         } else {
 627             SID = "fly runway heading ";
 628         }
 629         taxiFreqStr = formatATCFrequency3_2(taxiFreq);
 630         activeRunway = rec->getAircraft()->GetFlightPlan()->getRunway();
 631         transponderCode = rec->getAircraft()->GetTransponderCode();
 632
 633         text =
 634             receiver + ". Start-up approved. " + atisInformation +
 635             " correct, runway " + activeRunway + ", " + SID + ", squawk " +
 636             transponderCode + ". " +
 637             "For " + instructionText + " clearance call " + taxiFreqStr + ". " +
 638             sender;
 639         break;
 640     case MSG_ACKNOWLEDGE_SWITCH_GROUND_FREQUENCY:
 641         taxiFreqStr = formatATCFrequency3_2(taxiFreq);
 642         text = receiver + ". Switching to " + taxiFreqStr + ". " + sender;
 643         break;
 644     case MSG_INITIATE_CONTACT:
 645         text = receiver + ". With you. " + sender;
 646         break;
 647     case MSG_ACKNOWLEDGE_INITIATE_CONTACT:
 648         text = receiver + ". Roger. " + sender;
 649         break;
 650     case MSG_REQUEST_PUSHBACK_CLEARANCE:
 651         if (rec->getAircraft()->getTaxiClearanceRequest()) {
 652             text = receiver + ". Request push-back. " + sender;
 653         } else {
 654             text = receiver + ". Request Taxi clearance. " + sender;
 655         }
 656         break;
 657     case MSG_PERMIT_PUSHBACK_CLEARANCE:
 658         if (rec->getAircraft()->getTaxiClearanceRequest()) {
 659             text = receiver + ". Push-back approved. " + sender;
 660         } else {
 661             text = receiver + ". Cleared to Taxi." + sender;
 662         }
 663         break;
 664     case MSG_HOLD_PUSHBACK_CLEARANCE:
 665         text = receiver + ". Standby. " + sender;
 666         break;
 667     case MSG_REQUEST_TAXI_CLEARANCE:
 668         text = receiver + ". Ready to Taxi. " + sender;
 669         break;
 670     case MSG_ISSUE_TAXI_CLEARANCE:
 671         text = receiver + ". Cleared to taxi. " + sender;
 672         break;
 673     case MSG_ACKNOWLEDGE_TAXI_CLEARANCE:
 674         text = receiver + ". Cleared to taxi. " + sender;
 675         break;
 676     case MSG_HOLD_POSITION:
 677         text = receiver + ". Hold Position. " + sender;
 678         break;
 679     case MSG_ACKNOWLEDGE_HOLD_POSITION:
 680         text = receiver + ". Holding Position. " + sender;
 681         break;
 682     case MSG_RESUME_TAXI:
 683         text = receiver + ". Resume Taxiing. " + sender;
 684         break;
 685     case MSG_ACKNOWLEDGE_RESUME_TAXI:
 686         text = receiver + ". Continuing Taxi. " + sender;
 687         break;
 688     case MSG_REPORT_RUNWAY_HOLD_SHORT:
 689         activeRunway = rec->getAircraft()->GetFlightPlan()->getRunway();
 690         //activeRunway = "test";
 691         text = receiver + ". Holding short runway "
 692                         + activeRunway
 693                         + ". " + sender;
 694         //text = "test1";
 695         //cerr << "1 Currently at leg " << rec->getLeg() << endl;
 696         break;
 697     case MSG_ACKNOWLEDGE_REPORT_RUNWAY_HOLD_SHORT:
 698         activeRunway = rec->getAircraft()->GetFlightPlan()->getRunway();
 699         text = receiver + "Roger. Holding short runway "
 700         //                + activeRunway
 701                         + ". " + sender;
 702         //text = "test2";
 703         //cerr << "2 Currently at leg " << rec->getLeg() << endl;
 704         break;
 705     case MSG_SWITCH_TOWER_FREQUENCY:
 706         towerFreqStr = formatATCFrequency3_2(towerFreq);
 707         text = receiver + "Contact Tower at " + towerFreqStr + ". " + sender;
 708         //text = "test3";
 709         //cerr << "3 Currently at leg " << rec->getLeg() << endl;
 710         break;
 711     case MSG_ACKNOWLEDGE_SWITCH_TOWER_FREQUENCY:
 712         towerFreqStr = formatATCFrequency3_2(towerFreq);
 713         text = receiver + "Roger, switching to tower at " + towerFreqStr + ". " + sender;
 714         //text = "test4";
 715         //cerr << "4 Currently at leg " << rec->getLeg() << endl;
 716         break;
 717     default:
 718         //text = "test3";
 719         text = text + sender + ". Transmitting unknown Message";
 720         break;
 721     }
 722     if (audible) {
 723         double onBoardRadioFreq0 =
 724             fgGetDouble("/instrumentation/comm[0]/frequencies/selected-mhz");
 725         double onBoardRadioFreq1 =
 726             fgGetDouble("/instrumentation/comm[1]/frequencies/selected-mhz");
 727         int onBoardRadioFreqI0 = (int) floor(onBoardRadioFreq0 * 100 + 0.5);
 728         int onBoardRadioFreqI1 = (int) floor(onBoardRadioFreq1 * 100 + 0.5);
 729         //cerr << "Using " << onBoardRadioFreq0 << ", " << onBoardRadioFreq1 << " and " << stationFreq << " for " << text << endl;
 730
 731         // Display ATC message only when one of the radios is tuned
 732         // the relevant frequency.
 733         // Note that distance attenuation is currently not yet implemented
 734
 735         if ((onBoardRadioFreqI0 == stationFreq)
 736             || (onBoardRadioFreqI1 == stationFreq)) {
 737
 738             if (rec->allowTransmissions()) {
 739                 double snr = calculate_attenuation(rec, parent, ground_to_air);
 740                 if (snr <= 0)
 741                         return;
 742                 if (snr > 0 && snr < 12) {
 743                         //for low SNR values implement a way to make the conversation
 744                         //hard to understand but audible
 745                         //how this works in the real world, is the receiver AGC fails to capture the slope
 746                         //and the signal, due to being amplitude modulated, decreases volume after demodulation
 747                         //the implementation below is more akin to what would happen on a FM transmission
 748                         //therefore the correct way would be to work on the volume
 749                         string hash_noise = " ";
 750                         int reps = fabs((int)snr - 11);
 751                         int t_size = text.size();
 752                         for (int n=1;n<=reps * 2;n++) {
 753                                 int pos = rand() % t_size -1;
 754                                 text.replace(pos,1, hash_noise);
 755                         }
 756
 757                 }
 758                 fgSetString("/sim/messages/atc", text.c_str());
 759             }
 760         }
 761     } else {
 762         FGATCManager *atc = (FGATCManager*) globals->get_subsystem("atc");
 763         atc->getATCDialog()->addEntry(1, text);
 764
 765     }
 766 }
 767
 768 double FGATCController::calculate_attenuation(FGTrafficRecord * rec, FGAirportDynamics *parent,
 769                                int ground_to_air) {
 770
 771         ///  Implement radio attenuation
 772         ///  based on the Longley-Rice propagation model
 773
 774         FGScenery * scenery = globals->get_scenery();
 775         // player aircraft position
 776         double own_lat = fgGetDouble("/position/latitude-deg");
 777         double own_lon = fgGetDouble("/position/longitude-deg");
 778         double own_alt_ft = fgGetDouble("/position/altitude-ft");
 779         double own_alt= own_alt_ft * SG_FEET_TO_METER;
 780
 781         //cerr << "ITM:: pilot Lat: " << own_lat << ", Lon: " << own_lon << ", Alt: " << own_alt << endl;
 782
 783         SGGeod own_pos = SGGeod::fromDegM( own_lon, own_lat, own_alt );
 784         SGGeod max_own_pos = SGGeod::fromDegM( own_lon, own_lat, SG_MAX_ELEVATION_M );
 785         SGGeoc center = SGGeoc::fromGeod( max_own_pos );
 786         SGGeoc own_pos_c = SGGeoc::fromGeod( own_pos );
 787
 788         // position of sender radio antenna (HAAT)
 789         // sender can be aircraft or ground station
 790         double ATC_HAAT = 30.0;
 791         double Aircraft_HAAT = 5.0;
 792         double sender_alt_ft,sender_alt;
 793         double transmitter_height=0.0;
 794         double receiver_height=0.0;
 795         SGGeod sender_pos;
 796         SGGeod max_sender_pos;
 797         if(ground_to_air) {
 798                 sender_alt_ft = parent->getElevation();
 799                 sender_alt = sender_alt_ft * SG_FEET_TO_METER;
 800                 sender_pos= SGGeod::fromDegM( parent->getLongitude(),
 801                         parent->getLatitude(), sender_alt );
 802                 max_sender_pos = SGGeod::fromDegM( parent->getLongitude(),
 803                         parent->getLatitude(), SG_MAX_ELEVATION_M );
 804         }
 805         else {
 806                 sender_alt_ft = rec->getAltitude();
 807                 sender_alt = sender_alt_ft * SG_FEET_TO_METER;
 808                 sender_pos= SGGeod::fromDegM( rec->getLongitude(),
 809                         rec->getLatitude(), sender_alt );
 810                 max_sender_pos = SGGeod::fromDegM( rec->getLongitude(),
 811                         rec->getLatitude(), SG_MAX_ELEVATION_M );
 812         }
 813         SGGeoc sender_pos_c = SGGeoc::fromGeod( sender_pos );
 814         //cerr << "ITM:: sender Lat: " << parent->getLatitude() << ", Lon: " << parent->getLongitude() << ", Alt: " << sender_alt << endl;
 815
 816         double point_distance= 90.0; // regular SRTM is 90 meters
 817         double course = SGGeodesy::courseRad(own_pos_c, sender_pos_c);
 818         double distance_m = SGGeodesy::distanceM(own_pos, sender_pos);
 819         double probe_distance = 0.0;
 820
 821
 822         double max_points = distance_m / point_distance;
 823         deque<double> _elevations;
 824
 825         //SGGeod probe_pilot = SGGeod::fromGeoc(center.advanceRadM( course, 0 ));
 826         SGGeod probe_pilot = max_own_pos;
 827         double elevation_under_pilot = 0.0;
 828         if (scenery->get_elevation_m( probe_pilot, elevation_under_pilot, NULL )) {
 829                 receiver_height = own_alt - elevation_under_pilot + 3; //assume antenna located 3 meters above ground
 830         }
 831
 832
 833         //SGGeod probe_sender = SGGeod::fromGeoc(center.advanceRadM( course, distance_m ));
 834         SGGeod probe_sender = max_sender_pos;
 835         double elevation_under_sender = 0.0;
 836         if (scenery->get_elevation_m( probe_sender, elevation_under_sender, NULL )) {
 837                 transmitter_height = sender_alt - elevation_under_sender;
 838         }
 839         if(ground_to_air)
 840                 transmitter_height += ATC_HAAT;
 841         else
 842                 transmitter_height += Aircraft_HAAT;
 843
 844         cerr << "ITM:: RCVhgt: " << receiver_height << ", TRXhgt: " << transmitter_height << ", Distance: " << distance_m << endl;
 845         // If distance larger than this value (400 km), assume reception imposssible
 846         // technically 400 km is no problem if LOS conditions exist,
 847         // but we do this to spare resources
 848         if (distance_m > 400000)
 849                 return -1.0;
 850
 851         unsigned int e_size = (deque<unsigned>::size_type)max_points;
 852
 853         while (_elevations.size() <= e_size) {
 854                 probe_distance += point_distance;
 855                 SGGeod probe = SGGeod::fromGeoc(center.advanceRadM( course, probe_distance ));
 856
 857                 double elevation_m = 0.0;
 858
 859                 if (scenery->get_elevation_m( probe, elevation_m, NULL )) {
 860                          _elevations.push_front(elevation_m);
 861                          //cerr << "ITM:: Probe elev: " << elevation_m << endl;
 862                 }
 863         }
 864         _elevations.push_back(elevation_under_pilot);
 865         _elevations.push_front(elevation_under_sender);
 866         double max_alt_between=0.0;
 867         for( deque<double>::size_type i = 0; i < _elevations.size(); i++ ) {
 868                 if (_elevations[i] > max_alt_between) {
 869                         max_alt_between = _elevations[i];
 870                 }
 871         }
 872
 873         double num_points= (double)_elevations.size();
 874         //cerr << "ITM:: Max alt between: " << max_alt_between << ", num points:" << num_points << endl;
 875         _elevations.push_front(point_distance);
 876         _elevations.push_front(num_points -1);
 877         int size = _elevations.size();
 878         double itm_elev[size];
 879         for(int i=0;i<size;i++) {
 880                 itm_elev[i]=_elevations[i];
 881                 //cerr << "ITM:: itm_elev: " << _elevations[i] << endl;
 882         }
 883
 884         ////////////// ITM default parameters //////////////
 885         // later perhaps take them from tile materials?
 886         double eps_dielect=15.0;
 887         double sgm_conductivity = 0.005;
 888         double eno = 301.0;
 889         double frq_mhz = 125.0;         // middle of bandplan
 890         int radio_climate = 5;          // continental temperate
 891         int pol=1;      // assuming vertical polarization although this is more complex in reality
 892         double conf = 0.90;     // my own tests in Radiomobile have worked best with these values
 893         double rel = 0.80;      // ^^
 894         double dbloss;
 895         char strmode[150];
 896         int errnum;
 897
 898         /////////// radio parameters ///////////
 899         double receiver_sensitivity = -110.0;   // typical AM receiver sensitivity seems to be 0.8 microVolt at 12dB SINAD
 900         // AM transmitter power in dBm.
 901         // Note this value is calculated from the typical final transistor stage output
 902         // !!! small aircraft have portable transmitters which operate at 36 dBm output (4 Watts)
 903         // later store this value in aircraft description
 904         // ATC comms usually operate high power equipment, thus making the link asymetrical; this is ignored for now
 905         double transmitter_power = 43.0;
 906         double antenna_gain = 2.0;      //real-life gain for conventional monopole/dipole antenna
 907         if(ground_to_air)
 908                 transmitter_power = 49.0;
 909         else
 910                 transmitter_power = 43.0;
 911         if(ground_to_air)
 912                 antenna_gain = 5.0; //pilot plane's antenna gain + ground station antenna gain
 913         else
 914                 antenna_gain = 2.0; //pilot plane's antenna gain + AI aircraft antenna gain
 915         double link_budget = transmitter_power - receiver_sensitivity + antenna_gain;
 916
 917
 918         // first Fresnel zone radius
 919         // frequency in the middle of the bandplan, more accuracy is not necessary
 920         double fz_clr= 8.657 * sqrt(distance_m / 0.125);
 921
 922         // TODO: If we clear the first Fresnel zone, we are into line of sight teritory
 923
 924         // else we need to calculate point to point link loss
 925
 926         point_to_point(itm_elev, transmitter_height, receiver_height,
 927                 eps_dielect, sgm_conductivity, eno, frq_mhz, radio_climate,
 928                 pol, conf, rel, dbloss, strmode, errnum);
 929
 930         cerr << "ITM:: Link budget: " << link_budget << ", Attenuation: " << dbloss << " dBm, " << strmode << ", Error: " << errnum << endl;
 931
 932         //if (errnum !=0 && errnum !=1)
 933         //      return -1;
 934         double snr = link_budget - dbloss;
 935         return snr;
 936
 937 }
 938
 939 string FGATCController::formatATCFrequency3_2(int freq)
 940 {
 941     char buffer[7];
 942     snprintf(buffer, 7, "%3.2f", ((float) freq / 100.0));
 943     return string(buffer);
 944 }
 945
 946 // TODO: Set transponder codes according to real-world routes.
 947 // The current version just returns a random string of four octal numbers.
 948 string FGATCController::genTransponderCode(string fltRules)
 949 {
 950     if (fltRules == "VFR") {
 951         return string("1200");
 952     } else {
 953         char buffer[5];
 954         snprintf(buffer, 5, "%d%d%d%d", rand() % 8, rand() % 8, rand() % 8,
 955                  rand() % 8);
 956         return string(buffer);
 957     }
 958 }
 959
 960 void FGATCController::init()
 961 {
 962    if (!initialized) {
 963        FGATCManager *mgr = (FGATCManager*) globals->get_subsystem("ATC");
 964        mgr->addController(this);
 965        initialized = true;
 966     }
 967 }
 968
 969 /***************************************************************************
 970  * class FGTowerController
 971  *
 972  **************************************************************************/
 973 FGTowerController::FGTowerController(FGAirportDynamics *par) :
 974 FGATCController()
 975 {
 976     parent = par;
 977 }
 978
 979 //
 980 void FGTowerController::announcePosition(int id,
 981                                          FGAIFlightPlan * intendedRoute,
 982                                          int currentPosition, double lat,
 983                                          double lon, double heading,
 984                                          double speed, double alt,
 985                                          double radius, int leg,
 986                                          FGAIAircraft * ref)
 987 {
 988     init();
 989     TrafficVectorIterator i = activeTraffic.begin();
 990     // Search whether the current id alread has an entry
 991     // This might be faster using a map instead of a vector, but let's start by taking a safe route
 992     if (activeTraffic.size()) {
 993         //while ((i->getId() != id) && i != activeTraffic.end()) {
 994         while (i != activeTraffic.end()) {
 995             if (i->getId() == id) {
 996                 break;
 997             }
 998             i++;
 999         }
1000     }
1001     // Add a new TrafficRecord if no one exsists for this aircraft.
1002     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1003         FGTrafficRecord rec;
1004         rec.setId(id);
1005
1006         rec.setPositionAndHeading(lat, lon, heading, speed, alt);
1007         rec.setRunway(intendedRoute->getRunway());
1008         rec.setLeg(leg);
1009         //rec.setCallSign(callsign);
1010         rec.setRadius(radius);
1011         rec.setAircraft(ref);
1012         activeTraffic.push_back(rec);
1013         // Don't just schedule the aircraft for the tower controller, also assign if to the correct active runway.
1014         ActiveRunwayVecIterator rwy = activeRunways.begin();
1015         if (activeRunways.size()) {
1016             while (rwy != activeRunways.end()) {
1017                 if (rwy->getRunwayName() == intendedRoute->getRunway()) {
1018                     break;
1019                 }
1020                 rwy++;
1021             }
1022         }
1023         if (rwy == activeRunways.end()) {
1024             ActiveRunway aRwy(intendedRoute->getRunway(), id);
1025             aRwy.addToDepartureCue(ref);
1026             activeRunways.push_back(aRwy);
1027             rwy = (activeRunways.end()-1);
1028         } else {
1029             rwy->addToDepartureCue(ref);
1030         }
1031
1032         //cerr << ref->getTrafficRef()->getCallSign() << " You are number " << rwy->getDepartureCueSize() <<  " for takeoff " << endl;
1033     } else {
1034         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1035     }
1036 }
1037
1038 void FGTowerController::updateAircraftInformation(int id, double lat, double lon,
1039                                                   double heading, double speed, double alt,
1040                                                   double dt)
1041 {
1042     TrafficVectorIterator i = activeTraffic.begin();
1043     // Search whether the current id has an entry
1044     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1045     TrafficVectorIterator current, closest;
1046     if (activeTraffic.size()) {
1047         //while ((i->getId() != id) && i != activeTraffic.end()) {
1048         while (i != activeTraffic.end()) {
1049             if (i->getId() == id) {
1050                 break;
1051             }
1052             i++;
1053         }
1054     }
1055 //    // update position of the current aircraft
1056     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1057         SG_LOG(SG_GENERAL, SG_ALERT,
1058                "AI error: updating aircraft without traffic record");
1059     } else {
1060         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1061         current = i;
1062     }
1063     setDt(getDt() + dt);
1064
1065     // see if we already have a clearance record for the currently active runway
1066     // NOTE: dd. 2011-08-07: Because the active runway has been constructed in the announcePosition function, we may safely assume that is
1067     // already exists here. So, we can simplify the current code.
1068     ActiveRunwayVecIterator rwy = activeRunways.begin();
1069     while (rwy != activeRunways.end()) {
1070         if (rwy->getRunwayName() == current->getRunway()) {
1071             break;
1072         }
1073         rwy++;
1074     }
1075
1076     // only bother running the following code if the current aircraft is the
1077     // first in line for depature
1078     /* if (current->getAircraft() == rwy->getFirstAircraftInDepartureCue()) {
1079         if (rwy->getCleared()) {
1080             if (id == rwy->getCleared()) {
1081                 current->setHoldPosition(false);
1082             } else {
1083                 current->setHoldPosition(true);
1084             }
1085         } else {
1086             // For now. At later stages, this will probably be the place to check for inbound traffc.
1087             rwy->setCleared(id);
1088         }
1089     } */
1090     // only bother with aircraft that have a takeoff status of 2, since those are essentially under tower control
1091     if (current->getAircraft()->getTakeOffStatus() == 2) {
1092         current->setHoldPosition(true);
1093         int clearanceId = rwy->getCleared();
1094         if (clearanceId) {
1095             if (id == clearanceId) {
1096                 current->setHoldPosition(false);
1097             }
1098         } else {
1099             if (current->getAircraft() == rwy->getFirstAircraftInDepartureCue()) {
1100                 rwy->setCleared(id);
1101             }
1102         }
1103     }
1104 }
1105
1106
1107 void FGTowerController::signOff(int id)
1108 {
1109     TrafficVectorIterator i = activeTraffic.begin();
1110     // Search search if the current id alread has an entry
1111     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1112     if (activeTraffic.size()) {
1113         //while ((i->getId() != id) && i != activeTraffic.end()) {
1114         while (i != activeTraffic.end()) {
1115             if (i->getId() == id) {
1116                 break;
1117             }
1118             i++;
1119         }
1120     }
1121     // If this aircraft has left the runway, we can clear the departure record for this runway
1122     ActiveRunwayVecIterator rwy = activeRunways.begin();
1123     if (activeRunways.size()) {
1124         //while ((rwy->getRunwayName() != i->getRunway()) && (rwy != activeRunways.end())) {
1125         while (rwy != activeRunways.end()) {
1126             if (rwy->getRunwayName() == i->getRunway()) {
1127                 break;
1128             }
1129             rwy++;
1130         }
1131         if (rwy != activeRunways.end()) {
1132             rwy->setCleared(0);
1133             rwy->updateDepartureCue();
1134         } else {
1135             SG_LOG(SG_GENERAL, SG_ALERT,
1136                    "AI error: Attempting to erase non-existing runway clearance record in FGTowerController::signoff");
1137         }
1138     }
1139     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1140         SG_LOG(SG_GENERAL, SG_ALERT,
1141                "AI error: Aircraft without traffic record is signing off from tower");
1142     } else {
1143         i->getAircraft()->resetTakeOffStatus();
1144         i = activeTraffic.erase(i);
1145         //cerr << "Signing off from tower controller" << endl;
1146     }
1147 }
1148
1149 // NOTE:
1150 // IF WE MAKE TRAFFICRECORD A MEMBER OF THE BASE CLASS
1151 // THE FOLLOWING THREE FUNCTIONS: SIGNOFF, HAS INSTRUCTION AND GETINSTRUCTION CAN
1152 // BECOME DEVIRTUALIZED AND BE A MEMBER OF THE BASE ATCCONTROLLER CLASS
1153 // WHICH WOULD SIMPLIFY CODE MAINTENANCE.
1154 // Note that this function is probably obsolete
1155 bool FGTowerController::hasInstruction(int id)
1156 {
1157     TrafficVectorIterator i = activeTraffic.begin();
1158     // Search search if the current id has an entry
1159     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1160     if (activeTraffic.size()) {
1161         //while ((i->getId() != id) && i != activeTraffic.end()) {
1162         while (i != activeTraffic.end()) {
1163             if (i->getId() == id) {
1164                 break;
1165             }
1166             i++;
1167         }
1168     }
1169     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1170         SG_LOG(SG_GENERAL, SG_ALERT,
1171                "AI error: checking ATC instruction for aircraft without traffic record");
1172     } else {
1173         return i->hasInstruction();
1174     }
1175     return false;
1176 }
1177
1178
1179 FGATCInstruction FGTowerController::getInstruction(int id)
1180 {
1181     TrafficVectorIterator i = activeTraffic.begin();
1182     // Search search if the current id has an entry
1183     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1184     if (activeTraffic.size()) {
1185         //while ((i->getId() != id) && i != activeTraffic.end()) {
1186         while (i != activeTraffic.end()) {
1187             if (i->getId() == id) {
1188                 break;
1189             }
1190             i++;
1191         }
1192     }
1193     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1194         SG_LOG(SG_GENERAL, SG_ALERT,
1195                "AI error: requesting ATC instruction for aircraft without traffic record");
1196     } else {
1197         return i->getInstruction();
1198     }
1199     return FGATCInstruction();
1200 }
1201
1202 void FGTowerController::render(bool visible) {
1203     //cerr << "FGTowerController::render function not yet implemented" << endl;
1204 }
1205
1206 string FGTowerController::getName() {
1207     return string(parent->getId() + "-tower");
1208 }
1209
1210
1211
1212 /***************************************************************************
1213  * class FGStartupController
1214  *
1215  **************************************************************************/
1216 FGStartupController::FGStartupController(FGAirportDynamics *par):
1217     FGATCController()
1218 {
1219     parent = par;
1220 }
1221
1222 void FGStartupController::announcePosition(int id,
1223                                            FGAIFlightPlan * intendedRoute,
1224                                            int currentPosition, double lat,
1225                                            double lon, double heading,
1226                                            double speed, double alt,
1227                                            double radius, int leg,
1228                                            FGAIAircraft * ref)
1229 {
1230     init();
1231     TrafficVectorIterator i = activeTraffic.begin();
1232     // Search whether the current id alread has an entry
1233     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1234     if (activeTraffic.size()) {
1235         //while ((i->getId() != id) && i != activeTraffic.end()) {
1236         while (i != activeTraffic.end()) {
1237             if (i->getId() == id) {
1238                 break;
1239             }
1240             i++;
1241         }
1242     }
1243     // Add a new TrafficRecord if no one exsists for this aircraft.
1244     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1245         FGTrafficRecord rec;
1246         rec.setId(id);
1247
1248         rec.setPositionAndHeading(lat, lon, heading, speed, alt);
1249         rec.setRunway(intendedRoute->getRunway());
1250         rec.setLeg(leg);
1251         rec.setPositionAndIntentions(currentPosition, intendedRoute);
1252         //rec.setCallSign(callsign);
1253         rec.setAircraft(ref);
1254         rec.setHoldPosition(true);
1255         activeTraffic.push_back(rec);
1256     } else {
1257         i->setPositionAndIntentions(currentPosition, intendedRoute);
1258         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1259
1260     }
1261 }
1262
1263 // NOTE:
1264 // IF WE MAKE TRAFFICRECORD A MEMBER OF THE BASE CLASS
1265 // THE FOLLOWING THREE FUNCTIONS: SIGNOFF, HAS INSTRUCTION AND GETINSTRUCTION CAN
1266 // BECOME DEVIRTUALIZED AND BE A MEMBER OF THE BASE ATCCONTROLLER CLASS
1267 // WHICH WOULD SIMPLIFY CODE MAINTENANCE.
1268 // Note that this function is probably obsolete
1269 bool FGStartupController::hasInstruction(int id)
1270 {
1271     TrafficVectorIterator i = activeTraffic.begin();
1272     // Search search if the current id has an entry
1273     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1274     if (activeTraffic.size()) {
1275         //while ((i->getId() != id) && i != activeTraffic.end()) {
1276         while (i != activeTraffic.end()) {
1277             if (i->getId() == id) {
1278                 break;
1279             }
1280             i++;
1281         }
1282     }
1283     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1284         SG_LOG(SG_GENERAL, SG_ALERT,
1285                "AI error: checking ATC instruction for aircraft without traffic record");
1286     } else {
1287         return i->hasInstruction();
1288     }
1289     return false;
1290 }
1291
1292
1293 FGATCInstruction FGStartupController::getInstruction(int id)
1294 {
1295     TrafficVectorIterator i = activeTraffic.begin();
1296     // Search search if the current id has an entry
1297     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1298     if (activeTraffic.size()) {
1299         //while ((i->getId() != id) && i != activeTraffic.end()) {
1300         while (i != activeTraffic.end()) {
1301             if (i->getId() == id) {
1302                 break;
1303             }
1304             i++;
1305         }
1306     }
1307     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1308         SG_LOG(SG_GENERAL, SG_ALERT,
1309                "AI error: requesting ATC instruction for aircraft without traffic record");
1310     } else {
1311         return i->getInstruction();
1312     }
1313     return FGATCInstruction();
1314 }
1315
1316 void FGStartupController::signOff(int id)
1317 {
1318     TrafficVectorIterator i = activeTraffic.begin();
1319     // Search search if the current id alread has an entry
1320     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1321     if (activeTraffic.size()) {
1322         //while ((i->getId() != id) && i != activeTraffic.end()) {
1323         while (i != activeTraffic.end()) {
1324             if (i->getId() == id) {
1325                 break;
1326             }
1327             i++;
1328         }
1329     }
1330     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1331         SG_LOG(SG_GENERAL, SG_ALERT,
1332                "AI error: Aircraft without traffic record is signing off from tower");
1333     } else {
1334         //cerr << i->getAircraft()->getCallSign() << " signing off from startupcontroller" << endl;
1335         i = activeTraffic.erase(i);
1336     }
1337 }
1338
1339 bool FGStartupController::checkTransmissionState(int st, time_t now, time_t startTime, TrafficVectorIterator i, AtcMsgId msgId,
1340                                AtcMsgDir msgDir)
1341 {
1342     int state = i->getState();
1343     if ((state == st) && available) {
1344         if ((msgDir == ATC_AIR_TO_GROUND) && isUserAircraft(i->getAircraft())) {
1345
1346             //cerr << "Checking state " << st << " for " << i->getAircraft()->getCallSign() << endl;
1347             static SGPropertyNode_ptr trans_num = globals->get_props()->getNode("/sim/atc/transmission-num", true);
1348             int n = trans_num->getIntValue();
1349             if (n == 0) {
1350                 trans_num->setIntValue(-1);
1351                  // PopupCallback(n);
1352                  //cerr << "Selected transmission message " << n << endl;
1353                  FGATCManager *atc = (FGATCManager*) globals->get_subsystem("atc");
1354                  atc->getATCDialog()->removeEntry(1);
1355             } else {
1356                 //cerr << "creading message for " << i->getAircraft()->getCallSign() << endl;
1357                 transmit(&(*i), &(*parent), msgId, msgDir, false);
1358                 return false;
1359             }
1360         }
1361         if (now > startTime) {
1362             //cerr << "Transmitting startup msg" << endl;
1363             transmit(&(*i), &(*parent), msgId, msgDir, true);
1364             i->updateState();
1365             lastTransmission = now;
1366             available = false;
1367             return true;
1368         }
1369     }
1370     return false;
1371 }
1372
1373 void FGStartupController::updateAircraftInformation(int id, double lat, double lon,
1374                                                     double heading, double speed, double alt,
1375                                                     double dt)
1376 {
1377     TrafficVectorIterator i = activeTraffic.begin();
1378     // Search search if the current id has an entry
1379     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1380     TrafficVectorIterator current, closest;
1381     if (activeTraffic.size()) {
1382         //while ((i->getId() != id) && i != activeTraffic.end()) {
1383         while (i != activeTraffic.end()) {
1384             if (i->getId() == id) {
1385                 break;
1386             }
1387             i++;
1388         }
1389     }
1390 //    // update position of the current aircraft
1391
1392     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1393         SG_LOG(SG_GENERAL, SG_ALERT,
1394                "AI error: updating aircraft without traffic record");
1395     } else {
1396         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1397         current = i;
1398     }
1399     setDt(getDt() + dt);
1400
1401     int state = i->getState();
1402
1403     // The user controlled aircraft should have crased here, because it doesn't have a traffic reference.
1404     // NOTE: if we create a traffic schedule for the user aircraft, we can use this to plan a flight.
1405     time_t startTime = i->getAircraft()->getTrafficRef()->getDepartureTime();
1406     time_t now = time(NULL) + fgGetLong("/sim/time/warp");
1407     //cerr << i->getAircraft()->getTrafficRef()->getCallSign()
1408     //     << " is scheduled to depart in " << startTime-now << " seconds. Available = " << available
1409     //     << " at parking " << getGateName(i->getAircraft()) << endl;
1410
1411     if ((now - lastTransmission) > 3 + (rand() % 15)) {
1412         available = true;
1413     }
1414
1415     checkTransmissionState(0, now, (startTime + 0  ), i, MSG_ANNOUNCE_ENGINE_START,                     ATC_AIR_TO_GROUND);
1416     checkTransmissionState(1, now, (startTime + 60 ), i, MSG_REQUEST_ENGINE_START,                      ATC_AIR_TO_GROUND);
1417     checkTransmissionState(2, now, (startTime + 80 ), i, MSG_PERMIT_ENGINE_START,                       ATC_GROUND_TO_AIR);
1418     checkTransmissionState(3, now, (startTime + 100), i, MSG_ACKNOWLEDGE_ENGINE_START,                  ATC_AIR_TO_GROUND);
1419     if (checkTransmissionState(4, now, (startTime + 130), i, MSG_ACKNOWLEDGE_SWITCH_GROUND_FREQUENCY,       ATC_AIR_TO_GROUND)) {
1420         i->nextFrequency();
1421     }
1422     checkTransmissionState(5, now, (startTime + 140), i, MSG_INITIATE_CONTACT,                          ATC_AIR_TO_GROUND);
1423     checkTransmissionState(6, now, (startTime + 150), i, MSG_ACKNOWLEDGE_INITIATE_CONTACT,              ATC_GROUND_TO_AIR);
1424     checkTransmissionState(7, now, (startTime + 180), i, MSG_REQUEST_PUSHBACK_CLEARANCE,                ATC_AIR_TO_GROUND);
1425
1426
1427
1428     if ((state == 8) && available) {
1429         if (now > startTime + 200) {
1430             if (i->pushBackAllowed()) {
1431                 i->allowRepeatedTransmissions();
1432                 transmit(&(*i), &(*parent), MSG_PERMIT_PUSHBACK_CLEARANCE,
1433                          ATC_GROUND_TO_AIR, true);
1434                 i->updateState();
1435             } else {
1436                 transmit(&(*i), &(*parent), MSG_HOLD_PUSHBACK_CLEARANCE,
1437                          ATC_GROUND_TO_AIR, true);
1438                 i->suppressRepeatedTransmissions();
1439             }
1440             lastTransmission = now;
1441             available = false;
1442         }
1443     }
1444     if ((state == 9) && available) {
1445         i->setHoldPosition(false);
1446     }
1447 }
1448
1449 // Note that this function is copied from simgear. for maintanance purposes, it's probabtl better to make a general function out of that.
1450 static void WorldCoordinate(osg::Matrix& obj_pos, double lat,
1451                             double lon, double elev, double hdg, double slope)
1452 {
1453     SGGeod geod = SGGeod::fromDegM(lon, lat, elev);
1454     obj_pos = geod.makeZUpFrame();
1455     // hdg is not a compass heading, but a counter-clockwise rotation
1456     // around the Z axis
1457     obj_pos.preMult(osg::Matrix::rotate(hdg * SGD_DEGREES_TO_RADIANS,
1458                                         0.0, 0.0, 1.0));
1459     obj_pos.preMult(osg::Matrix::rotate(slope * SGD_DEGREES_TO_RADIANS,
1460                                         0.0, 1.0, 0.0));
1461 }
1462
1463
1464 void FGStartupController::render(bool visible)
1465 {
1466
1467     SGMaterialLib *matlib = globals->get_matlib();
1468     if (group) {
1469         //int nr = ;
1470         globals->get_scenery()->get_scene_graph()->removeChild(group);
1471         //while (group->getNumChildren()) {
1472         //  cerr << "Number of children: " << group->getNumChildren() << endl;
1473         //simgear::EffectGeode* geode = (simgear::EffectGeode*) group->getChild(0);
1474           //osg::MatrixTransform *obj_trans = (osg::MatrixTransform*) group->getChild(0);
1475            //geode->releaseGLObjects();
1476            //group->removeChild(geode);
1477            //delete geode;
1478         group = 0;
1479     }
1480     if (visible) {
1481         group = new osg::Group;
1482         FGScenery * local_scenery = globals->get_scenery();
1483         double elevation_meters = 0.0;
1484         double elevation_feet = 0.0;
1485
1486
1487         //for ( FGTaxiSegmentVectorIterator i = segments.begin(); i != segments.end(); i++) {
1488         double dx = 0;
1489         for   (TrafficVectorIterator i = activeTraffic.begin(); i != activeTraffic.end(); i++) {
1490             // Handle start point
1491             int pos = i->getCurrentPosition();
1492             //cerr << "rendering for " << i->getAircraft()->getCallSign() << "pos = " << pos << endl;
1493             if (pos > 0) {
1494                 FGTaxiSegment *segment  = parent->getGroundNetwork()->findSegment(pos);
1495                 SGGeod start(SGGeod::fromDeg((i->getLongitude()), (i->getLatitude())));
1496                 SGGeod end  (SGGeod::fromDeg(segment->getEnd()->getLongitude(), segment->getEnd()->getLatitude()));
1497
1498                 double length = SGGeodesy::distanceM(start, end);
1499                 //heading = SGGeodesy::headingDeg(start->getGeod(), end->getGeod());
1500
1501                 double az2, heading; //, distanceM;
1502                 SGGeodesy::inverse(start, end, heading, az2, length);
1503                 double coveredDistance = length * 0.5;
1504                 SGGeod center;
1505                 SGGeodesy::direct(start, heading, coveredDistance, center, az2);
1506                 //cerr << "Active Aircraft : Centerpoint = (" << center.getLatitudeDeg() << ", " << center.getLongitudeDeg() << "). Heading = " << heading << endl;
1507                 ///////////////////////////////////////////////////////////////////////////////
1508                 // Make a helper function out of this
1509                 osg::Matrix obj_pos;
1510                 osg::MatrixTransform *obj_trans = new osg::MatrixTransform;
1511                 obj_trans->setDataVariance(osg::Object::STATIC);
1512                 // Experimental: Calculate slope here, based on length, and the individual elevations
1513                 double elevationStart;
1514                 if (isUserAircraft((i)->getAircraft())) {
1515                     elevationStart = fgGetDouble("/position/ground-elev-m");
1516                 } else {
1517                     elevationStart = ((i)->getAircraft()->_getAltitude());
1518                 }
1519                 double elevationEnd   = segment->getEnd()->getElevation();
1520                 if ((elevationEnd == 0) || (elevationEnd == parent->getElevation())) {
1521                     SGGeod center2 = end;
1522                     center2.setElevationM(SG_MAX_ELEVATION_M);
1523                     if (local_scenery->get_elevation_m( center2, elevationEnd, NULL )) {
1524                         elevation_feet = elevationEnd * SG_METER_TO_FEET + 0.5;
1525                             //elevation_meters += 0.5;
1526                     }
1527                     else {
1528                         elevationEnd = parent->getElevation();
1529                     }
1530                     segment->getEnd()->setElevation(elevationEnd);
1531                 }
1532
1533                 double elevationMean  = (elevationStart + elevationEnd) / 2.0;
1534                 double elevDiff       = elevationEnd - elevationStart;
1535
1536                double slope = atan2(elevDiff, length) * SGD_RADIANS_TO_DEGREES;
1537
1538                //cerr << "1. Using mean elevation : " << elevationMean << " and " << slope << endl;
1539
1540                 WorldCoordinate( obj_pos, center.getLatitudeDeg(), center.getLongitudeDeg(), elevationMean + 0.5, -(heading), slope );
1541 ;
1542
1543                 obj_trans->setMatrix( obj_pos );
1544                 //osg::Vec3 center(0, 0, 0)
1545
1546                 float width = length /2.0;
1547                 osg::Vec3 corner(-width, 0, 0.25f);
1548                 osg::Vec3 widthVec(2*width + 1, 0, 0);
1549                 osg::Vec3 heightVec(0, 1, 0);
1550                 osg::Geometry* geometry;
1551                 geometry = osg::createTexturedQuadGeometry(corner, widthVec, heightVec);
1552                 simgear::EffectGeode* geode = new simgear::EffectGeode;
1553                 geode->setName("test");
1554                 geode->addDrawable(geometry);
1555                 //osg::Node *custom_obj;
1556                 SGMaterial *mat = matlib->find("UnidirectionalTaper");
1557                 if (mat)
1558                     geode->setEffect(mat->get_effect());
1559                 obj_trans->addChild(geode);
1560                 // wire as much of the scene graph together as we can
1561                 //->addChild( obj_trans );
1562                 group->addChild( obj_trans );
1563                 /////////////////////////////////////////////////////////////////////
1564             } else {
1565                 //cerr << "BIG FAT WARNING: current position is here : " << pos << endl;
1566             }
1567             for(intVecIterator j = (i)->getIntentions().begin(); j != (i)->getIntentions().end(); j++) {
1568                 osg::Matrix obj_pos;
1569                 int k = (*j);
1570                 if (k > 0) {
1571                     //cerr << "rendering for " << i->getAircraft()->getCallSign() << "intention = " << k << endl;
1572                     osg::MatrixTransform *obj_trans = new osg::MatrixTransform;
1573                     obj_trans->setDataVariance(osg::Object::STATIC);
1574                     FGTaxiSegment *segment  = parent->getGroundNetwork()->findSegment(k);
1575
1576                     double elevationStart = segment->getStart()->getElevation();
1577                     double elevationEnd   = segment->getEnd  ()->getElevation();
1578                     if ((elevationStart == 0) || (elevationStart == parent->getElevation())) {
1579                         SGGeod center2 = segment->getStart()->getGeod();
1580                         center2.setElevationM(SG_MAX_ELEVATION_M);
1581                         if (local_scenery->get_elevation_m( center2, elevationStart, NULL )) {
1582                             elevation_feet = elevationStart * SG_METER_TO_FEET + 0.5;
1583                             //elevation_meters += 0.5;
1584                         }
1585                         else {
1586                             elevationStart = parent->getElevation();
1587                         }
1588                         segment->getStart()->setElevation(elevationStart);
1589                     }
1590                     if ((elevationEnd == 0) || (elevationEnd == parent->getElevation())) {
1591                         SGGeod center2 = segment->getEnd()->getGeod();
1592                         center2.setElevationM(SG_MAX_ELEVATION_M);
1593                         if (local_scenery->get_elevation_m( center2, elevationEnd, NULL )) {
1594                             elevation_feet = elevationEnd * SG_METER_TO_FEET + 0.5;
1595                             //elevation_meters += 0.5;
1596                         }
1597                         else {
1598                             elevationEnd = parent->getElevation();
1599                         }
1600                         segment->getEnd()->setElevation(elevationEnd);
1601                     }
1602
1603                     double elevationMean  = (elevationStart + elevationEnd) / 2.0;
1604                     double elevDiff       = elevationEnd - elevationStart;
1605                     double length         = segment->getLength();
1606                     double slope = atan2(elevDiff, length) * SGD_RADIANS_TO_DEGREES;
1607
1608                     //cerr << "2. Using mean elevation : " << elevationMean << " and " << slope << endl;
1609
1610
1611                     WorldCoordinate( obj_pos, segment->getLatitude(), segment->getLongitude(), elevationMean + 0.5, -(segment->getHeading()), slope );
1612
1613                     //WorldCoordinate( obj_pos, segment->getLatitude(), segment->getLongitude(), parent->getElevation()+8+dx, -(segment->getHeading()) );
1614
1615                     obj_trans->setMatrix( obj_pos );
1616                     //osg::Vec3 center(0, 0, 0)
1617
1618                     float width = segment->getLength() /2.0;
1619                     osg::Vec3 corner(-width, 0, 0.25f);
1620                     osg::Vec3 widthVec(2*width + 1, 0, 0);
1621                     osg::Vec3 heightVec(0, 1, 0);
1622                     osg::Geometry* geometry;
1623                     geometry = osg::createTexturedQuadGeometry(corner, widthVec, heightVec);
1624                     simgear::EffectGeode* geode = new simgear::EffectGeode;
1625                     geode->setName("test");
1626                     geode->addDrawable(geometry);
1627                     //osg::Node *custom_obj;
1628                     SGMaterial *mat = matlib->find("UnidirectionalTaper");
1629                     if (mat)
1630                         geode->setEffect(mat->get_effect());
1631                     obj_trans->addChild(geode);
1632                     // wire as much of the scene graph together as we can
1633                     //->addChild( obj_trans );
1634                     group->addChild( obj_trans );
1635                 } else {
1636                     //cerr << "BIG FAT WARNING: k is here : " << pos << endl;
1637                 }
1638             }
1639             //dx += 0.1;
1640         }
1641         globals->get_scenery()->get_scene_graph()->addChild(group);
1642     }
1643 }
1644
1645 string FGStartupController::getName() {
1646     return string(parent->getId() + "-startup");
1647 }
1648
1649
1650 /***************************************************************************
1651  * class FGApproachController
1652  *
1653  **************************************************************************/
1654 FGApproachController::FGApproachController(FGAirportDynamics *par):
1655 FGATCController()
1656 {
1657     parent = par;
1658 }
1659
1660 //
1661 void FGApproachController::announcePosition(int id,
1662                                             FGAIFlightPlan * intendedRoute,
1663                                             int currentPosition,
1664                                             double lat, double lon,
1665                                             double heading, double speed,
1666                                             double alt, double radius,
1667                                             int leg, FGAIAircraft * ref)
1668 {
1669     init();
1670     TrafficVectorIterator i = activeTraffic.begin();
1671     // Search whether the current id alread has an entry
1672     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1673     if (activeTraffic.size()) {
1674         //while ((i->getId() != id) && i != activeTraffic.end()) {
1675         while (i != activeTraffic.end()) {
1676             if (i->getId() == id) {
1677                 break;
1678             }
1679             i++;
1680         }
1681     }
1682     // Add a new TrafficRecord if no one exsists for this aircraft.
1683     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1684         FGTrafficRecord rec;
1685         rec.setId(id);
1686
1687         rec.setPositionAndHeading(lat, lon, heading, speed, alt);
1688         rec.setRunway(intendedRoute->getRunway());
1689         rec.setLeg(leg);
1690         //rec.setCallSign(callsign);
1691         rec.setAircraft(ref);
1692         activeTraffic.push_back(rec);
1693     } else {
1694         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1695     }
1696 }
1697
1698 void FGApproachController::updateAircraftInformation(int id, double lat, double lon,
1699                                                      double heading, double speed, double alt,
1700                                                      double dt)
1701 {
1702     TrafficVectorIterator i = activeTraffic.begin();
1703     // Search search if the current id has an entry
1704     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1705     TrafficVectorIterator current, closest;
1706     if (activeTraffic.size()) {
1707         //while ((i->getId() != id) && i != activeTraffic.end()) {
1708         while (i != activeTraffic.end()) {
1709             if (i->getId() == id) {
1710                 break;
1711             }
1712             i++;
1713         }
1714     }
1715 //    // update position of the current aircraft
1716     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1717         SG_LOG(SG_GENERAL, SG_ALERT,
1718                "AI error: updating aircraft without traffic record");
1719     } else {
1720         i->setPositionAndHeading(lat, lon, heading, speed, alt);
1721         current = i;
1722         //cerr << "ApproachController: checking for speed" << endl;
1723         time_t time_diff =
1724             current->getAircraft()->
1725             checkForArrivalTime(string("final001"));
1726         if (time_diff > 15) {
1727             current->setSpeedAdjustment(current->getAircraft()->
1728                                         getPerformance()->vDescent() *
1729                                         1.35);
1730         } else if (time_diff > 5) {
1731             current->setSpeedAdjustment(current->getAircraft()->
1732                                         getPerformance()->vDescent() *
1733                                         1.2);
1734         } else if (time_diff < -15) {
1735             current->setSpeedAdjustment(current->getAircraft()->
1736                                         getPerformance()->vDescent() *
1737                                         0.65);
1738         } else if (time_diff < -5) {
1739             current->setSpeedAdjustment(current->getAircraft()->
1740                                         getPerformance()->vDescent() *
1741                                         0.8);
1742         } else {
1743             current->clearSpeedAdjustment();
1744         }
1745         //current->setSpeedAdjustment(current->getAircraft()->getPerformance()->vDescent() + time_diff);
1746     }
1747     setDt(getDt() + dt);
1748 }
1749
1750 void FGApproachController::signOff(int id)
1751 {
1752     TrafficVectorIterator i = activeTraffic.begin();
1753     // Search search if the current id alread has an entry
1754     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1755     if (activeTraffic.size()) {
1756         //while ((i->getId() != id) && i != activeTraffic.end()) {
1757         while (i != activeTraffic.end()) {
1758             if (i->getId() == id) {
1759                 break;
1760             }
1761             i++;
1762         }
1763     }
1764     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1765         SG_LOG(SG_GENERAL, SG_ALERT,
1766                "AI error: Aircraft without traffic record is signing off from approach");
1767     } else {
1768         i = activeTraffic.erase(i);
1769     }
1770 }
1771
1772
1773
1774
1775 bool FGApproachController::hasInstruction(int id)
1776 {
1777     TrafficVectorIterator i = activeTraffic.begin();
1778     // Search search if the current id has an entry
1779     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1780     if (activeTraffic.size()) {
1781         //while ((i->getId() != id) && i != activeTraffic.end()) {
1782         while (i != activeTraffic.end()) {
1783             if (i->getId() == id) {
1784                 break;
1785             }
1786             i++;
1787         }
1788     }
1789     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1790         SG_LOG(SG_GENERAL, SG_ALERT,
1791                "AI error: checking ATC instruction for aircraft without traffic record");
1792     } else {
1793         return i->hasInstruction();
1794     }
1795     return false;
1796 }
1797
1798
1799 FGATCInstruction FGApproachController::getInstruction(int id)
1800 {
1801     TrafficVectorIterator i = activeTraffic.begin();
1802     // Search search if the current id has an entry
1803     // This might be faster using a map instead of a vector, but let's start by taking a safe route
1804     if (activeTraffic.size()) {
1805         //while ((i->getId() != id) && i != activeTraffic.end()) {
1806         while (i != activeTraffic.end()) {
1807             if (i->getId() == id) {
1808                 break;
1809             }
1810             i++;
1811         }
1812     }
1813     if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
1814         SG_LOG(SG_GENERAL, SG_ALERT,
1815                "AI error: requesting ATC instruction for aircraft without traffic record");
1816     } else {
1817         return i->getInstruction();
1818     }
1819     return FGATCInstruction();
1820 }
1821
1822
1823 ActiveRunway *FGApproachController::getRunway(string name)
1824 {
1825     ActiveRunwayVecIterator rwy = activeRunways.begin();
1826     if (activeRunways.size()) {
1827         while (rwy != activeRunways.end()) {
1828             if (rwy->getRunwayName() == name) {
1829                 break;
1830             }
1831             rwy++;
1832         }
1833     }
1834     if (rwy == activeRunways.end()) {
1835         ActiveRunway aRwy(name, 0);
1836         activeRunways.push_back(aRwy);
1837         rwy = activeRunways.end() - 1;
1838     }
1839     return &(*rwy);
1840 }
1841
1842 void FGApproachController::render(bool visible) {
1843     //cerr << "FGApproachController::render function not yet implemented" << endl;
1844 }
1845
1846
1847
1848 string FGApproachController::getName() {
1849     return string(parent->getId() + "-approach");
1850 }