1 // trafficrecord.cxx - Implementation of AIModels ATC code.
3 // Written by Durk Talsma, started September 2006.
5 // Copyright (C) 2006 Durk Talsma.
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.
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.
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.
27 #include "trafficcontrol.hxx"
28 #include <AIModel/AIAircraft.hxx>
29 #include <AIModel/AIFlightPlan.hxx>
30 #include <Traffic/TrafficMgr.hxx>
31 #include <Airports/groundnetwork.hxx>
32 #include <Airports/dynamics.hxx>
34 /***************************************************************************
36 **************************************************************************/
37 FGTrafficRecord::FGTrafficRecord() :
50 void FGTrafficRecord::setPositionAndIntentions(int pos, FGAIFlightPlan *route)
54 if (intentions.size()) {
55 intVecIterator i = intentions.begin();
57 SG_LOG(SG_GENERAL, SG_ALERT, "Error in FGTrafficRecord::setPositionAndIntentions");
58 //cerr << "Pos : " << pos << " Curr " << *(intentions.begin()) << endl;
59 for (intVecIterator i = intentions.begin(); i != intentions.end() ; i++) {
60 //cerr << (*i) << " ";
67 //FGAIFlightPlan::waypoint* const wpt= route->getCurrentWaypoint();
68 int size = route->getNrOfWayPoints();
69 //cerr << "Setting pos" << pos << " ";
70 //cerr << "setting intentions ";
71 for (int i = 0; i < size; i++) {
72 int val = route->getRouteIndex(i);
74 if ((val) && (val != pos))
76 intentions.push_back(val);
81 //while (route->next(&legNr, &routeNr)) {
82 //intentions.push_back(routeNr);
84 //route->rewind(currentPos);
89 bool FGTrafficRecord::checkPositionAndIntentions(FGTrafficRecord &other)
92 //cerr << "Start check 1" << endl;
93 if (currentPos == other.currentPos)
95 //cerr << callsign << ": Check Position and intentions: we are on the same taxiway" << other.callsign << "Index = " << currentPos << endl;
98 // else if (other.intentions.size())
100 // cerr << "Start check 2" << endl;
101 // intVecIterator i = other.intentions.begin();
102 // while (!((i == other.intentions.end()) || ((*i) == currentPos)))
104 // if (i != other.intentions.end()) {
105 // cerr << "Check Position and intentions: current matches other.intentions" << endl;
108 else if (intentions.size()) {
109 //cerr << "Start check 3" << endl;
110 intVecIterator i = intentions.begin();
111 //while (!((i == intentions.end()) || ((*i) == other.currentPos)))
112 while (i != intentions.end()) {
113 if ((*i) == other.currentPos) {
118 if (i != intentions.end()) {
119 //cerr << callsign << ": Check Position and intentions: .other.current matches" << other.callsign << "Index = " << (*i) << endl;
123 //cerr << "Done !!" << endl;
127 void FGTrafficRecord::setPositionAndHeading(double lat, double lon, double hdg,
128 double spd, double alt)
137 int FGTrafficRecord::crosses(FGGroundNetwork *net, FGTrafficRecord &other)
139 if (checkPositionAndIntentions(other) || (other.checkPositionAndIntentions(*this)))
142 int currentTargetNode = 0, otherTargetNode = 0;
144 currentTargetNode = net->findSegment(currentPos )->getEnd()->getIndex(); // OKAY,...
145 if (other.currentPos > 0)
146 otherTargetNode = net->findSegment(other.currentPos)->getEnd()->getIndex(); // OKAY,...
147 if ((currentTargetNode == otherTargetNode) && currentTargetNode > 0)
148 return currentTargetNode;
149 if (intentions.size())
151 for (i = intentions.begin(); i != intentions.end(); i++)
154 if ((currentTargetNode == net->findSegment(*i)->getEnd()->getIndex()))
156 //cerr << "Current crosses at " << currentTargetNode <<endl;
157 return currentTargetNode;
162 if (other.intentions.size())
164 for (i = other.intentions.begin(); i != other.intentions.end(); i++)
167 if (otherTargetNode == net->findSegment(*i)->getEnd()->getIndex())
169 //cerr << "Other crosses at " << currentTargetNode <<endl;
170 return otherTargetNode;
175 if (intentions.size() && other.intentions.size())
177 for (i = intentions.begin(); i != intentions.end(); i++)
179 for (j = other.intentions.begin(); j != other.intentions.end(); j++)
181 //cerr << "finding segment " << *i << " and " << *j << endl;
182 if (((*i) > 0) && ((*j) > 0)) {
183 currentTargetNode = net->findSegment(*i)->getEnd()->getIndex();
184 otherTargetNode = net->findSegment(*j)->getEnd()->getIndex();
185 if (currentTargetNode == otherTargetNode)
187 //cerr << "Routes will cross at " << currentTargetNode << endl;
188 return currentTargetNode;
197 bool FGTrafficRecord::onRoute(FGGroundNetwork *net, FGTrafficRecord &other)
199 int node = -1, othernode = -1;
201 node = net->findSegment(currentPos)->getEnd()->getIndex();
202 if (other.currentPos > 0)
203 othernode = net->findSegment(other.currentPos)->getEnd()->getIndex();
204 if ((node == othernode) && (node != -1))
206 if (other.intentions.size())
208 for (intVecIterator i = other.intentions.begin(); i != other.intentions.end(); i++)
212 othernode = net->findSegment(*i)->getEnd()->getIndex();
213 if ((node == othernode) && (node > -1))
218 //if (other.currentPos > 0)
219 // othernode = net->findSegment(other.currentPos)->getEnd()->getIndex();
220 //if (intentions.size())
222 // for (intVecIterator i = intentions.begin(); i != intentions.end(); i++)
226 // node = net->findSegment(*i)->getEnd()->getIndex();
227 // if ((node == othernode) && (node > -1))
236 bool FGTrafficRecord::isOpposing (FGGroundNetwork *net, FGTrafficRecord &other, int node)
238 // Check if current segment is the reverse segment for the other aircraft
240 //cerr << "Current segment " << currentPos << endl;
241 if ((currentPos > 0) && (other.currentPos > 0))
243 opp = net->findSegment(currentPos)->opposite();
245 if (opp->getIndex() == other.currentPos)
249 for (intVecIterator i = intentions.begin(); i != intentions.end(); i++)
251 if (opp = net->findSegment(other.currentPos)->opposite())
254 if (opp->getIndex() == net->findSegment(*i)->getIndex())
256 if (net->findSegment(*i)->getStart()->getIndex() == node) {
258 //cerr << "Found the node " << node << endl;
264 if (other.intentions.size())
266 for (intVecIterator j = other.intentions.begin(); j != other.intentions.end(); j++)
268 // cerr << "Current segment 1 " << (*i) << endl;
270 if (opp = net->findSegment(*i)->opposite())
272 if (opp->getIndex() ==
273 net->findSegment(*j)->getIndex())
275 //cerr << "Nodes " << net->findSegment(*i)->getIndex()
276 // << " and " << net->findSegment(*j)->getIndex()
277 // << " are opposites " << endl;
278 if (net->findSegment(*i)->getStart()->getIndex() == node) {
280 //cerr << "Found the node " << node << endl;
294 void FGTrafficRecord::setSpeedAdjustment(double spd)
296 instruction.setChangeSpeed(true);
297 instruction.setSpeed(spd);
300 void FGTrafficRecord::setHeadingAdjustment(double heading)
302 instruction.setChangeHeading(true);
303 instruction.setHeading(heading);
308 /***************************************************************************
311 **************************************************************************/
312 FGATCInstruction::FGATCInstruction()
315 holdPosition = false;
317 changeHeading = false;
318 changeAltitude = false;
319 resolveCircularWait = false;
326 bool FGATCInstruction::hasInstruction()
328 return (holdPattern || holdPosition || changeSpeed || changeHeading || changeAltitude || resolveCircularWait);
331 string FGATCController::getGateName(FGAIAircraft *ref)
333 return ref->atGate();
336 void FGATCController::transmit(FGTrafficRecord *rec, AtcMsgId msgId, AtcMsgDir msgDir)
338 string sender, receiver;
341 string atisInformation;
344 case ATC_AIR_TO_GROUND:
345 sender = rec->getAircraft()->getTrafficRef()->getCallSign();
346 switch (rec->getLeg()) {
350 rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getDynamics()->getGroundFrequency(rec->getLeg());
352 rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getDynamics()->getGroundFrequency(3);
353 receiver = rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getName() + "-Ground";
354 atisInformation = rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getDynamics()->getAtisInformation();
357 receiver = rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getName() + "-Tower";
361 case ATC_GROUND_TO_AIR:
362 receiver = rec->getAircraft()->getTrafficRef()->getCallSign();
363 switch (rec->getLeg()) {
367 rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getDynamics()->getGroundFrequency(rec->getLeg());
369 rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getDynamics()->getGroundFrequency(3);
370 sender = rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getName() + "-Ground";
371 atisInformation = rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getDynamics()->getAtisInformation();
375 sender = rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getName() + "-Tower";
388 case MSG_ANNOUNCE_ENGINE_START:
389 text = sender + ". Ready to Start up";
391 case MSG_REQUEST_ENGINE_START:
392 text = receiver + ", This is " + sender + ". Position " +getGateName(rec->getAircraft()) +
393 ". Information " + atisInformation + ". " +
394 rec->getAircraft()->getTrafficRef()->getFlightRules() + " to " +
395 rec->getAircraft()->getTrafficRef()->getArrivalAirport()->getName() + ". Request start-up";
397 // Acknowledge engine startup permission
398 // Assign departure runway
399 // Assign SID, if necessery (TODO)
400 case MSG_PERMIT_ENGINE_START:
401 taxiFreqStr = formatATCFrequency3_2(taxiFreq);
403 heading = rec->getAircraft()->getTrafficRef()->getCourse();
404 fltType = rec->getAircraft()->getTrafficRef()->getFlightType();
405 rwyClass= rec->getAircraft()->GetFlightPlan()->getRunwayClassFromTrafficType(fltType);
407 rec->getAircraft()->getTrafficRef()->getDepartureAirport()->getDynamics()->getActiveRunway(rwyClass, 1, activeRunway, heading);
408 rec->getAircraft()->GetFlightPlan()->setRunway(activeRunway);
409 //snprintf(buffer, 7, "%3.2f", heading);
410 text = receiver + ". Start-up approved. " + atisInformation + " correct, runway " + activeRunway
411 + ", AAA departure, squawk BBBB. " +
412 "For push-back and taxi clearance call " + taxiFreqStr + ". " + sender + " control.";
414 case MSG_DENY_ENGINE_START:
415 text = receiver + ". Standby";
417 case MSG_ACKNOWLEDGE_ENGINE_START:
418 taxiFreqStr = formatATCFrequency3_2(taxiFreq);
419 activeRunway = rec->getAircraft()->GetFlightPlan()->getRunway();
420 text = receiver + ". Start-up approved. " + atisInformation + " correct, runway " +
421 activeRunway + ", AAA departure, squawk BBBB. " +
422 "For push-back and taxi clearance call " + taxiFreqStr + ". " + sender;
427 double onBoardRadioFreq0 = fgGetDouble("/instrumentation/comm[0]/frequencies/selected-mhz");
428 double onBoardRadioFreq1 = fgGetDouble("/instrumentation/comm[1]/frequencies/selected-mhz");
429 int onBoardRadioFreqI0 = (int) floor(onBoardRadioFreq0 * 100 + 0.5);
430 int onBoardRadioFreqI1 = (int) floor(onBoardRadioFreq1 * 100 + 0.5);
431 //cerr << "Using " << onBoardRadioFreq0 << ", " << onBoardRadioFreq1 << " and " << stationFreq << endl;
433 // Display ATC message only when one of the radios is tuned
434 // the relevant frequency.
435 // Note that distance attenuation is currently not yet implemented
436 //cerr << "Transmitting " << text << " at " << stationFreq;
437 if ((onBoardRadioFreqI0 == stationFreq) || (onBoardRadioFreqI1 == stationFreq)) {
438 fgSetString("/sim/messages/atc", text.c_str());
439 //cerr << "Printing Message: " << endl;
443 string FGATCController::formatATCFrequency3_2(int freq) {
445 snprintf(buffer, 7, "%3.2f", ( (float) freq / 100.0) );
446 return string(buffer);
449 /***************************************************************************
450 * class FGTowerController
452 **************************************************************************/
453 FGTowerController::FGTowerController() :
459 void FGTowerController::announcePosition(int id, FGAIFlightPlan *intendedRoute, int currentPosition,
460 double lat, double lon, double heading,
461 double speed, double alt, double radius, int leg,
464 TrafficVectorIterator i = activeTraffic.begin();
465 // Search whether the current id alread has an entry
466 // This might be faster using a map instead of a vector, but let's start by taking a safe route
467 if (activeTraffic.size()) {
468 //while ((i->getId() != id) && i != activeTraffic.end()) {
469 while (i != activeTraffic.end()) {
470 if (i->getId() == id) {
477 // Add a new TrafficRecord if no one exsists for this aircraft.
478 if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
482 rec.setPositionAndHeading(lat, lon, heading, speed, alt);
483 rec.setRunway(intendedRoute->getRunway());
485 //rec.setCallSign(callsign);
486 rec.setAircraft(ref);
487 activeTraffic.push_back(rec);
489 i->setPositionAndHeading(lat, lon, heading, speed, alt);
493 void FGTowerController::update(int id, double lat, double lon, double heading, double speed, double alt,
496 TrafficVectorIterator i = activeTraffic.begin();
497 // Search search if the current id has an entry
498 // This might be faster using a map instead of a vector, but let's start by taking a safe route
499 TrafficVectorIterator current, closest;
500 if (activeTraffic.size()) {
501 //while ((i->getId() != id) && i != activeTraffic.end()) {
502 while (i != activeTraffic.end()) {
503 if (i->getId() == id) {
510 // // update position of the current aircraft
511 if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
512 SG_LOG(SG_GENERAL, SG_ALERT, "AI error: updating aircraft without traffic record");
514 i->setPositionAndHeading(lat, lon, heading, speed, alt);
519 // // see if we already have a clearance record for the currently active runway
520 ActiveRunwayVecIterator rwy = activeRunways.begin();
521 // again, a map might be more efficient here
522 if (activeRunways.size()) {
523 //while ((rwy->getRunwayName() != current->getRunway()) && (rwy != activeRunways.end())) {
524 while (rwy != activeRunways.end()) {
525 if (rwy->getRunwayName() == current->getRunway()) {
531 if (rwy == activeRunways.end()) {
532 ActiveRunway aRwy(current->getRunway(), id);
533 activeRunways.push_back(aRwy); // Since there are no clearance records for this runway yet
534 current->setHoldPosition(false); // Clear the current aircraft to continue
537 // Okay, we have a clearance record for this runway, so check
538 // whether the clearence ID matches that of the current aircraft
539 if (id == rwy->getCleared()) {
540 current->setHoldPosition(false);
542 current->setHoldPosition(true);
548 void FGTowerController::signOff(int id)
550 TrafficVectorIterator i = activeTraffic.begin();
551 // Search search if the current id alread has an entry
552 // This might be faster using a map instead of a vector, but let's start by taking a safe route
553 if (activeTraffic.size()) {
554 //while ((i->getId() != id) && i != activeTraffic.end()) {
555 while (i != activeTraffic.end()) {
556 if (i->getId() == id) {
562 // If this aircraft has left the runway, we can clear the departure record for this runway
563 ActiveRunwayVecIterator rwy = activeRunways.begin();
564 if (activeRunways.size()) {
565 //while ((rwy->getRunwayName() != i->getRunway()) && (rwy != activeRunways.end())) {
566 while (rwy != activeRunways.end()) {
567 if (rwy->getRunwayName() == i->getRunway()) {
572 if (rwy != activeRunways.end()) {
573 rwy = activeRunways.erase(rwy);
575 SG_LOG(SG_GENERAL, SG_ALERT, "AI error: Attempting to erase non-existing runway clearance record in FGTowerController::signoff");
578 if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
579 SG_LOG(SG_GENERAL, SG_ALERT, "AI error: Aircraft without traffic record is signing off from tower");
581 i = activeTraffic.erase(i);
586 // IF WE MAKE TRAFFICRECORD A MEMBER OF THE BASE CLASS
587 // THE FOLLOWING THREE FUNCTIONS: SIGNOFF, HAS INSTRUCTION AND GETINSTRUCTION CAN
588 // BECOME DEVIRTUALIZED AND BE A MEMBER OF THE BASE ATCCONTROLLER CLASS
589 // WHICH WOULD SIMPLIFY CODE MAINTENANCE.
590 // Note that this function is probably obsolete
591 bool FGTowerController::hasInstruction(int id)
593 TrafficVectorIterator i = activeTraffic.begin();
594 // Search search if the current id has an entry
595 // This might be faster using a map instead of a vector, but let's start by taking a safe route
596 if (activeTraffic.size())
598 //while ((i->getId() != id) && i != activeTraffic.end()) {
599 while (i != activeTraffic.end()) {
600 if (i->getId() == id) {
606 if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
607 SG_LOG(SG_GENERAL, SG_ALERT, "AI error: checking ATC instruction for aircraft without traffic record");
609 return i->hasInstruction();
615 FGATCInstruction FGTowerController::getInstruction(int id)
617 TrafficVectorIterator i = activeTraffic.begin();
618 // Search search if the current id has an entry
619 // This might be faster using a map instead of a vector, but let's start by taking a safe route
620 if (activeTraffic.size()) {
621 //while ((i->getId() != id) && i != activeTraffic.end()) {
622 while (i != activeTraffic.end()) {
623 if (i->getId() == id) {
629 if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
630 SG_LOG(SG_GENERAL, SG_ALERT, "AI error: requesting ATC instruction for aircraft without traffic record");
632 return i->getInstruction();
634 return FGATCInstruction();
637 /***************************************************************************
638 * class FGStartupController
640 **************************************************************************/
641 FGStartupController::FGStartupController() :
645 lastTransmission = 0;
648 void FGStartupController::announcePosition(int id, FGAIFlightPlan *intendedRoute, int currentPosition,
649 double lat, double lon, double heading,
650 double speed, double alt, double radius, int leg,
653 TrafficVectorIterator i = activeTraffic.begin();
654 // Search whether the current id alread has an entry
655 // This might be faster using a map instead of a vector, but let's start by taking a safe route
656 if (activeTraffic.size()) {
657 //while ((i->getId() != id) && i != activeTraffic.end()) {
658 while (i != activeTraffic.end()) {
659 if (i->getId() == id) {
666 // Add a new TrafficRecord if no one exsists for this aircraft.
667 if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
671 rec.setPositionAndHeading(lat, lon, heading, speed, alt);
672 rec.setRunway(intendedRoute->getRunway());
674 //rec.setCallSign(callsign);
675 rec.setAircraft(ref);
676 rec.setHoldPosition(true);
677 activeTraffic.push_back(rec);
679 i->setPositionAndHeading(lat, lon, heading, speed, alt);
685 // IF WE MAKE TRAFFICRECORD A MEMBER OF THE BASE CLASS
686 // THE FOLLOWING THREE FUNCTIONS: SIGNOFF, HAS INSTRUCTION AND GETINSTRUCTION CAN
687 // BECOME DEVIRTUALIZED AND BE A MEMBER OF THE BASE ATCCONTROLLER CLASS
688 // WHICH WOULD SIMPLIFY CODE MAINTENANCE.
689 // Note that this function is probably obsolete
690 bool FGStartupController::hasInstruction(int id)
692 TrafficVectorIterator i = activeTraffic.begin();
693 // Search search if the current id has an entry
694 // This might be faster using a map instead of a vector, but let's start by taking a safe route
695 if (activeTraffic.size())
697 //while ((i->getId() != id) && i != activeTraffic.end()) {
698 while (i != activeTraffic.end()) {
699 if (i->getId() == id) {
705 if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
706 SG_LOG(SG_GENERAL, SG_ALERT, "AI error: checking ATC instruction for aircraft without traffic record");
708 return i->hasInstruction();
714 FGATCInstruction FGStartupController::getInstruction(int id)
716 TrafficVectorIterator i = activeTraffic.begin();
717 // Search search if the current id has an entry
718 // This might be faster using a map instead of a vector, but let's start by taking a safe route
719 if (activeTraffic.size()) {
720 //while ((i->getId() != id) && i != activeTraffic.end()) {
721 while (i != activeTraffic.end()) {
722 if (i->getId() == id) {
728 if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
729 SG_LOG(SG_GENERAL, SG_ALERT, "AI error: requesting ATC instruction for aircraft without traffic record");
731 return i->getInstruction();
733 return FGATCInstruction();
736 void FGStartupController::signOff(int id)
738 TrafficVectorIterator i = activeTraffic.begin();
739 // Search search if the current id alread has an entry
740 // This might be faster using a map instead of a vector, but let's start by taking a safe route
741 if (activeTraffic.size()) {
742 //while ((i->getId() != id) && i != activeTraffic.end()) {
743 while (i != activeTraffic.end()) {
744 if (i->getId() == id) {
750 if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
751 SG_LOG(SG_GENERAL, SG_ALERT, "AI error: Aircraft without traffic record is signing off from tower");
753 i = activeTraffic.erase(i);
757 void FGStartupController::update(int id, double lat, double lon, double heading, double speed, double alt,
760 TrafficVectorIterator i = activeTraffic.begin();
761 // Search search if the current id has an entry
762 // This might be faster using a map instead of a vector, but let's start by taking a safe route
763 TrafficVectorIterator current, closest;
764 if (activeTraffic.size()) {
765 //while ((i->getId() != id) && i != activeTraffic.end()) {
766 while (i != activeTraffic.end()) {
767 if (i->getId() == id) {
774 // // update position of the current aircraft
775 if (i == activeTraffic.end() || (activeTraffic.size() == 0)) {
776 SG_LOG(SG_GENERAL, SG_ALERT, "AI error: updating aircraft without traffic record");
778 i->setPositionAndHeading(lat, lon, heading, speed, alt);
783 int state = i->getState();
784 time_t startTime = i->getAircraft()->getTrafficRef()->getDepartureTime();
785 time_t now = time(NULL) + fgGetLong("/sim/time/warp");
786 //cerr << i->getAircraft()->getTrafficRef()->getCallSign()
787 // << " is scheduled to depart in " << startTime-now << " seconds. Available = " << available
788 // << " at parking " << getGateName(i->getAircraft()) << endl;
790 if ((now - lastTransmission) > 3 + (rand() % 15)) {
794 if ((state == 0) && available) {
795 if (now > startTime) {
796 //cerr << "Transmitting startup msg" << endl;
797 transmit(&(*i), MSG_ANNOUNCE_ENGINE_START, ATC_AIR_TO_GROUND);
799 lastTransmission = now;
803 if ((state == 1) && available) {
804 if (now > startTime+60) {
805 transmit(&(*i), MSG_REQUEST_ENGINE_START, ATC_AIR_TO_GROUND);
807 lastTransmission = now;
811 if ((state == 2) && available) {
812 if (now > startTime+80) {
813 transmit(&(*i), MSG_PERMIT_ENGINE_START, ATC_GROUND_TO_AIR);
815 lastTransmission = now;
819 if ((state == 3) && available){
820 if (now > startTime+100) {
821 transmit(&(*i), MSG_ACKNOWLEDGE_ENGINE_START, ATC_AIR_TO_GROUND);
823 lastTransmission = now;
827 // TODO: Switch to APRON control and request pushback Clearance.
828 // Get Push back clearance
829 if ((state == 4) && available){
830 i->setHoldPosition(false);