longFinalAcknowledged(false),
finalReported(false),
finalAcknowledged(false),
+onRwy(false),
+nextOnRwy(false),
opType(TTT_UNKNOWN),
leg(LEG_UNKNOWN),
isUser(false)
longFinalAcknowledged(false),
finalReported(false),
finalAcknowledged(false),
+onRwy(false),
+nextOnRwy(false),
opType(TTT_UNKNOWN),
leg(LEG_UNKNOWN),
isUser(false)
longFinalAcknowledged(false),
finalReported(false),
finalAcknowledged(false),
+onRwy(false),
+nextOnRwy(false),
opType(TTT_UNKNOWN),
leg(LEG_UNKNOWN),
isUser(false)
longFinalAcknowledged(false),
finalReported(false),
finalAcknowledged(false),
+onRwy(false),
+nextOnRwy(false),
opType(TTT_UNKNOWN),
leg(LEG_UNKNOWN),
isUser(false)
rwyListItr = rwyList.begin();
circuitListItr = circuitList.begin();
trafficListItr = trafficList.begin();
+
+ freqClear = true;
}
FGTower::~FGTower() {
// Assume the user is started at the threshold ready to take-off
TowerPlaneRec* t = new TowerPlaneRec;
t->plane.callsign = "Charlie Foxtrot Sierra"; // C-FGFS !!! - fixme - this is a bit hardwired
+ t->plane.type = GA_SINGLE;
t->opType = TTT_UNKNOWN; // We don't know if the user wants to do circuits or a departure...
t->leg = TAKEOFF_ROLL;
t->isUser = true;
t->planePtr->RegisterTransmission(3); // cleared to line-up
t->leg = TAKEOFF_ROLL;
//} else if(arriving plane < some threshold away) {
- } else if(0) { // FIXME
+ } else if(GetTrafficETA(2) < 150.0) {
trns += " cleared immediate take-off";
- // TODO - add traffic is... ?
+ if(trafficList.size()) {
+ tower_plane_rec_list_iterator trfcItr = trafficList.begin();
+ trfcItr++; // At the moment the holding plane should be first in trafficList.
+ // Note though that this will break if holding planes aren't put in trafficList in the future.
+ TowerPlaneRec* trfc = *trfcItr;
+ trns += "... traffic is";
+ switch(trfc->plane.type) {
+ case UNKNOWN:
+ break;
+ case GA_SINGLE:
+ trns += " a Cessna"; // TODO - add ability to specify actual plane type somewhere
+ break;
+ case GA_HP_SINGLE:
+ trns += " a Piper";
+ break;
+ case GA_TWIN:
+ trns += " a King-air";
+ break;
+ case GA_JET:
+ trns += " a Learjet";
+ break;
+ case MEDIUM:
+ trns += " a Regional";
+ break;
+ case HEAVY:
+ trns += " a Heavy";
+ break;
+ case MIL_JET:
+ trns += " Military";
+ break;
+ }
+ if(trfc->opType == STRAIGHT_IN || trfc->opType == TTT_UNKNOWN) {
+ double miles_out = CalcDistOutMiles(trfc);
+ if(miles_out < 2) {
+ trns += " on final";
+ } else {
+ trns += " on ";
+ trns += ConvertNumToSpokenDigits((int)miles_out);
+ trns += " mile final";
+ }
+ } else if(trfc->opType == CIRCUIT) {
+ switch(trfc->leg) {
+ case FINAL:
+ trns += " on final";
+ break;
+ case TURN4:
+ trns += " turning final";
+ break;
+ case BASE:
+ trns += " on base";
+ break;
+ case TURN3:
+ trns += " turning base";
+ break;
+ case DOWNWIND:
+ trns += " in circuit";
+ break;
+ // And to eliminate compiler warnings...
+ case TAKEOFF_ROLL: break;
+ case CLIMBOUT: break;
+ case TURN1: break;
+ case CROSSWIND: break;
+ case TURN2: break;
+ case LANDING_ROLL: break;
+ case LEG_UNKNOWN: break;
+ }
+ }
+ } else {
+ // By definition there should be some arriving traffic if we're cleared for immediate takeoff
+ SG_LOG(SG_ATC, SG_WARN, "Warning: Departing traffic cleared for *immediate* take-off despite no arriving traffic in FGTower");
+ }
t->clearedToTakeOff = true;
t->planePtr->RegisterTransmission(4); // cleared to take-off - TODO differentiate between immediate and normal take-off
t->leg = TAKEOFF_ROLL;
holdListItr = holdList.begin();
}
} else {
- // possibly tell him to hold and what position he is?
+ // Tell him to hold and what position he is.
+ // Not currently sure under which circumstances we do or don't bother transmitting this.
+ string trns = t->plane.callsign;
+ trns += " hold position";
+ if(display) {
+ globals->get_ATC_display()->RegisterSingleMessage(trns, 0);
+ }
+ t->holdShortReported = false;
+ t->clearanceCounter = 0;
+ // TODO - add some idea of what traffic is blocking him.
}
} else {
t->clearanceCounter += (dt * holdList.size() * ii_max);
}
- }
+ } else { // not responding to report, but still need to clear if clear
+ if(t->nextOnRwy) {
+ if(rwyOccupied) {
+ // Do nothing for now - consider acknowloging hold short eventually
+ } else {
+ // Lets Roll !!!!
+ string trns = t->plane.callsign;
+ //if(departed plane < some threshold in time away) {
+ if(0) { // FIXME
+ trns += " line up";
+ t->clearedToLineUp = true;
+ t->planePtr->RegisterTransmission(3); // cleared to line-up
+ t->leg = TAKEOFF_ROLL;
+ //} else if(arriving plane < some threshold away) {
+ } else if(GetTrafficETA(2) < 150.0) {
+ trns += " cleared immediate take-off";
+ // TODO - add traffic is... ?
+ t->clearedToTakeOff = true;
+ t->planePtr->RegisterTransmission(4); // cleared to take-off - TODO differentiate between immediate and normal take-off
+ t->leg = TAKEOFF_ROLL;
+ } else {
+ trns += " cleared for take-off";
+ // TODO - add traffic is... ?
+ t->clearedToTakeOff = true;
+ t->planePtr->RegisterTransmission(4); // cleared to take-off
+ t->leg = TAKEOFF_ROLL;
+ }
+ if(display) {
+ globals->get_ATC_display()->RegisterSingleMessage(trns, 0);
+ }
+ rwyList.push_back(t);
+ rwyOccupied = true;
+ holdList.erase(holdListItr);
+ holdListItr = holdList.begin();
+ }
+ }
+ // TODO - remove the considerable code duplication above!
+ }
++holdListItr;
}
}
// Do the runway list - we'll do the whole runway list since it's important and there'll never be many planes on the rwy at once!!
+ // FIXME - at the moment it looks like we're only doing the first plane from the rwy list.
if(ii == 5) {
if(rwyOccupied) {
if(!rwyList.size()) {
rwyList.pop_front();
} else if(t->opType == CIRCUIT) {
circuitList.push_back(t);
+ //cout << "Oggy oggy oggy\n";
+ AddToTrafficList(t);
rwyList.pop_front();
} else if(t->opType == TTT_UNKNOWN) {
depList.push_back(t);
circuitList.push_back(t);
+ //cout << "Aggy aggy aggy\n";
+ AddToTrafficList(t);
rwyList.pop_front();
} else {
// HELP - we shouldn't ever get here!!!
if(t->opType == TTT_UNKNOWN) {
if(tortho.y() > 5000) {
// 5 km out from threshold - assume it's a departure
- t->opType = OUTBOUND;
+ t->opType = OUTBOUND; // TODO - could check if the user has climbed significantly above circuit altitude as well.
// Since we are unknown operation we should be in depList already.
circuitList.erase(circuitListItr);
+ RemoveFromTrafficList(t->plane.callsign);
circuitListItr = circuitList.begin();
}
} else if(t->opType == CIRCUIT) {
//cout << "Turn2\n";
} else {
t->leg = TURN3;
+ // Probably safe now to assume the user is flying a circuit
+ t->opType = CIRCUIT;
//cout << "Turn3\n";
}
} else {
}
}
+ // Do one plane from the approach list
+ if(ii == 7) {
+ if(appList.size()) {
+ if(appListItr == appList.end()) {
+ appListItr = appList.begin();
+ }
+ TowerPlaneRec* t = *appListItr;
+ //cout << "t = " << t << endl;
+ if(t->isUser) {
+ t->pos.setlon(user_lon_node->getDoubleValue());
+ t->pos.setlat(user_lat_node->getDoubleValue());
+ t->pos.setelev(user_elev_node->getDoubleValue());
+ } else {
+ // TODO - set/update the position if it's an AI plane
+ }
+ if(t->nextOnRwy && !(t->clearedToLand)) {
+ // check distance away and whether runway occupied
+ // and schedule transmission if necessary
+ }
+ ++appListItr;
+ }
+ }
+
doCommunication();
if(!separateGround) {
}
-// Calculate the eta of each plane to the threshold.
+// Returns true if successful
+bool FGTower::RemoveFromTrafficList(string id) {
+ tower_plane_rec_list_iterator twrItr;
+ for(twrItr = trafficList.begin(); twrItr != trafficList.end(); twrItr++) {
+ TowerPlaneRec* tpr = *twrItr;
+ if(tpr->plane.callsign == id) {
+ trafficList.erase(twrItr);
+ return(true);
+ }
+ }
+ SG_LOG(SG_ATC, SG_WARN, "Warning - unable to remove aircraft " << id << " from trafficList in FGTower");
+ return(false);
+}
+
+
+// Add a tower plane rec with ETA to the traffic list in the correct position ETA-wise
+// and set nextOnRwy if so.
+// Returns true if this could cause a threshold ETA conflict with other traffic, false otherwise.
+// For planes holding they are put in the first position with time to go, and the return value is
+// true if in the first position (nextOnRwy) and false otherwise.
+bool FGTower::AddToTrafficList(TowerPlaneRec* t, bool holding) {
+ //cout << "AddToTrafficList called, currently size = " << trafficList.size() << ", holding = " << holding << '\n';
+ double separation_time = 90.0; // seconds - this is currently a guess for light plane separation, and includes a few seconds for a holding plane to taxi onto the rwy.
+ bool conflict = false;
+ double lastETA = 0.0;
+ bool firstTime = true;
+ // FIXME - make this more robust for different plane types eg. light following heavy.
+ tower_plane_rec_list_iterator twrItr;
+ for(twrItr = trafficList.begin(); twrItr != trafficList.end(); twrItr++) {
+ TowerPlaneRec* tpr = *twrItr;
+ if(holding) {
+ //cout << (tpr->isUser ? "USER!\n" : "NOT user\n");
+ //cout << "tpr->eta - lastETA = " << tpr->eta - lastETA << '\n';
+ if(tpr->eta - lastETA > separation_time) {
+ t->nextOnRwy = firstTime;
+ trafficList.insert(twrItr, t);
+ return(firstTime);
+ }
+ firstTime = false;
+ } else {
+ if(t->eta < tpr->eta) {
+ // Ugg - this one's tricky.
+ // It depends on what the two planes are doing and whether there's a conflict what we do.
+ if(tpr->eta - t->eta > separation_time) { // No probs, plane 2 can squeeze in before plane 1 with no apparent conflict
+ if(tpr->nextOnRwy) {
+ tpr->nextOnRwy = false;
+ t->nextOnRwy = true;
+ }
+ trafficList.insert(twrItr, t);
+ } else { // Ooops - this ones tricky - we have a potential conflict!
+ conflict = true;
+ }
+ return(conflict);
+ }
+ }
+ }
+ // If we get here we must be at the end of the list, or maybe the list is empty.
+ if(!trafficList.size()) {
+ t->nextOnRwy = true;
+ // conflict and firstTime should be false and true respectively in this case anyway.
+ }
+ trafficList.push_back(t);
+ return(holding ? firstTime : conflict);
+}
+
+
+// Calculate the eta of a plane to the threshold.
// For ground traffic this is the fastest they can get there.
// For air traffic this is the middle approximation.
-void FGTower::doThresholdETACalc() {
+void FGTower::CalcETA(TowerPlaneRec* tpr) {
// For now we'll be very crude and hardwire expected speeds to C172-like values
// The speeds below are specified in knots IAS and then converted to m/s
double app_ias = 100.0 * 0.514444; // Speed during straight-in approach
double circuit_ias = 80.0 * 0.514444; // Speed around circuit
double final_ias = 70.0 * 0.514444; // Speed during final approach
-
- tower_plane_rec_list_iterator twrItr;
-
+
// Sign convention - dist_out is -ve for approaching planes and +ve for departing planes
// dist_across is +ve in the pattern direction - ie a plane correctly on downwind will have a +ve dist_across
- for(twrItr = trafficList.begin(); twrItr != trafficList.end(); twrItr++) {
- TowerPlaneRec* tpr = *twrItr;
- Point3D op = ortho.ConvertToLocal(tpr->pos);
- double dist_out_m = op.y();
- double dist_across_m = fabs(op.x()); // FIXME = the fabs is a hack to cope with the fact that we don't know the circuit direction yet
- //cout << "Doing ETA calc for " << tpr->plane.callsign << '\n';
- if(tpr->opType == CIRCUIT) {
- // It's complicated - depends on if base leg is delayed or not
- if(tpr->leg == LANDING_ROLL) {
- tpr->eta = 0;
- } else if((tpr->leg == FINAL) || (tpr->leg == TURN4)) {
- tpr->eta = fabs(dist_out_m) / final_ias;
- } else if((tpr->leg == BASE) || (tpr->leg == TURN3)) {
- tpr->eta = (fabs(dist_out_m) / final_ias) + (dist_across_m / circuit_ias);
+
+ Point3D op = ortho.ConvertToLocal(tpr->pos);
+ double dist_out_m = op.y();
+ double dist_across_m = fabs(op.x()); // FIXME = the fabs is a hack to cope with the fact that we don't know the circuit direction yet
+ //cout << "Doing ETA calc for " << tpr->plane.callsign << '\n';
+
+ if(tpr->opType == STRAIGHT_IN) {
+ double dist_to_go_m = sqrt((dist_out_m * dist_out_m) + (dist_across_m * dist_across_m));
+ if(dist_to_go_m < 1000) {
+ tpr->eta = dist_to_go_m / final_ias;
+ } else {
+ tpr->eta = (1000.0 / final_ias) + ((dist_to_go_m - 1000.0) / app_ias);
+ }
+ } else if(tpr->opType == CIRCUIT || tpr->opType == TTT_UNKNOWN) { // Hack alert - UNKNOWN has sort of been added here as a temporary hack.
+ // It's complicated - depends on if base leg is delayed or not
+ if(tpr->leg == LANDING_ROLL) {
+ tpr->eta = 0;
+ } else if((tpr->leg == FINAL) || (tpr->leg == TURN4)) {
+ tpr->eta = fabs(dist_out_m) / final_ias;
+ } else if((tpr->leg == BASE) || (tpr->leg == TURN3)) {
+ tpr->eta = (fabs(dist_out_m) / final_ias) + (dist_across_m / circuit_ias);
+ } else {
+ // Need to calculate where base leg is likely to be
+ // FIXME - for now I'll hardwire it to 1000m which is what AILocalTraffic uses!!!
+ // TODO - as a matter of design - AILocalTraffic should get the nominal no-traffic base turn distance from Tower, since in real life the published pattern might differ from airport to airport
+ double nominal_base_dist_out_m = -1000;
+ double current_base_dist_out_m;
+ if(!GetBaseConstraint(current_base_dist_out_m)) {
+ current_base_dist_out_m = nominal_base_dist_out_m;
+ }
+ double nominal_dist_across_m = 1000; // Hardwired value from AILocalTraffic
+ double current_dist_across_m;
+ if(!GetDownwindConstraint(current_dist_across_m)) {
+ current_dist_across_m = nominal_dist_across_m;
+ }
+ double nominal_cross_dist_out_m = 1000; // Bit of a guess - AI plane turns to crosswind at 600ft agl.
+ tpr->eta = fabs(current_base_dist_out_m) / final_ias; // final
+ if((tpr->leg == DOWNWIND) || (tpr->leg == TURN2)) {
+ tpr->eta += dist_across_m / circuit_ias;
+ tpr->eta += fabs(current_base_dist_out_m - dist_out_m) / circuit_ias;
+ } else if((tpr->leg == CROSSWIND) || (tpr->leg == TURN1)) {
+ tpr->eta += nominal_dist_across_m / circuit_ias; // should we use the dist across of the previous plane if there is previous still on downwind?
+ tpr->eta += fabs(current_base_dist_out_m - nominal_cross_dist_out_m) / circuit_ias;
+ tpr->eta += (nominal_dist_across_m - dist_across_m) / circuit_ias;
} else {
- // Need to calculate where base leg is likely to be
- // FIXME - for now I'll hardwire it to 1000m which is what AILocalTraffic uses!!!
- // TODO - as a matter of design - AILocalTraffic should get the nominal no-traffic base turn distance from Tower, since in real life the published pattern might differ from airport to airport
- double nominal_base_dist_out_m = -1000;
- double current_base_dist_out_m = nominal_base_dist_out_m;
- double nominal_dist_across_m = 1000; // Hardwired value from AILocalTraffic
- double nominal_cross_dist_out_m = 1000; // Bit of a guess - AI plane turns to crosswind at 600ft agl.
- tpr->eta = fabs(current_base_dist_out_m) / final_ias; // final
- if((tpr->leg == DOWNWIND) || (tpr->leg == TURN2)) {
- tpr->eta += dist_across_m / circuit_ias;
- tpr->eta += fabs(current_base_dist_out_m - dist_out_m) / circuit_ias;
- } else if((tpr->leg == CROSSWIND) || (tpr->leg == TURN1)) {
- tpr->eta += nominal_dist_across_m / circuit_ias; // should we use the dist across of the previous plane if there is previous still on downwind?
- tpr->eta += fabs(current_base_dist_out_m - nominal_cross_dist_out_m) / circuit_ias;
- tpr->eta += (nominal_dist_across_m - dist_across_m) / circuit_ias;
- } else {
- // We've only just started - why not use a generic estimate?
- }
+ // We've only just started - why not use a generic estimate?
}
- } else if((tpr->opType == INBOUND) || (tpr->opType == STRAIGHT_IN)) {
- // It's simpler!
- } else {
- // Must be outbound - ignore it!
}
//cout << "ETA = " << tpr->eta << '\n';
+ } else {
+ tpr->eta = 99999;
+ }
+}
+
+
+// Calculate the distance of a plane to the threshold in meters
+// TODO - Modify to calculate flying distance of a plane in the circuit
+double FGTower::CalcDistOutM(TowerPlaneRec* tpr) {
+ return(dclGetHorizontalSeparation(rwy.threshold_pos, tpr->pos));
+}
+
+
+// Calculate the distance of a plane to the threshold in miles
+// TODO - Modify to calculate flying distance of a plane in the circuit
+double FGTower::CalcDistOutMiles(TowerPlaneRec* tpr) {
+ return(CalcDistOutM(tpr) / 1600.0); // FIXME - use a proper constant if possible.
+}
+
+
+// Iterate through all the lists and call CalcETA for all the planes.
+void FGTower::doThresholdETACalc() {
+ tower_plane_rec_list_iterator twrItr;
+ // Do the approach list first
+ for(twrItr = appList.begin(); twrItr != appList.end(); twrItr++) {
+ TowerPlaneRec* tpr = *twrItr;
+ CalcETA(tpr);
+ }
+ // Then the circuit list
+ for(twrItr = circuitList.begin(); twrItr != circuitList.end(); twrItr++) {
+ TowerPlaneRec* tpr = *twrItr;
+ CalcETA(tpr);
}
}
+// Check that the planes in traffic list are correctly ordered,
+// that the nearest (timewise) is flagged next on rwy, and return
+// true if any threshold use conflicts are detected, false otherwise.
bool FGTower::doThresholdUseOrder() {
- return(true);
+ bool conflict = false;
+
+ // TODO - write some code here!
+
+ return(conflict);
}
void FGTower::doCommunication() {
}
+// Return the ETA of plane no. list_pos (1-based) in the traffic list.
+// i.e. list_pos = 1 implies next to use runway.
+double FGTower::GetTrafficETA(unsigned int list_pos) {
+ if(trafficList.size() < list_pos) {
+ return(99999);
+ }
+
+ tower_plane_rec_list_iterator twrItr;
+ twrItr = trafficList.begin();
+ for(unsigned int i = 1; i < list_pos; i++, twrItr++);
+ //cout << "ETA returned = " << (*twrItr)->eta << '\n';
+ return((*twrItr)->eta);
+}
+
+
void FGTower::ContactAtHoldShort(PlaneRec plane, FGAIPlane* requestee, tower_traffic_type operation) {
// HACK - assume that anything contacting at hold short is new for now - FIXME LATER
TowerPlaneRec* t = new TowerPlaneRec;
t->clearedToTakeOff = false;
t->opType = operation;
- // HACK ALERT - THIS IS HARDWIRED FOR TESTING - FIXME TODO ETC
- t->nextOnRwy = true;
+ //cout << "Hold Short reported by " << plane.callsign << '\n';
+
+ bool next = AddToTrafficList(t, true);
+
+ if(next) {
+ //cout << "Next to take off - respond with clearance\n";
+ double teta = GetTrafficETA(2);
+ if(teta < 150.0) {
+ t->clearanceCounter = 7.0; // This reduces the delay before response to 3 secs if an immediate takeoff is reqd
+ //cout << "Reducing response time to request due imminent traffic\n";
+ }
+ } else {
+ //cout << "Not next to take off - respond with hold\n";
+ }
//cout << "t = " << t << '\n';
void FGTower::RequestLandingClearance(string ID) {
//cout << "Request Landing Clearance called...\n";
+
+ // Assume this comes from the user - have another function taking a pointer to the AIplane for the AI traffic.
+ // For now we'll also assume that the user is a light plane and can get him/her to join the circuit if necessary.
+
+ TowerPlaneRec* t = new TowerPlaneRec;
+ t->isUser = true;
+ t->clearedToLand = false;
+ t->pos.setlon(user_lon_node->getDoubleValue());
+ t->pos.setlat(user_lat_node->getDoubleValue());
+ t->pos.setelev(user_elev_node->getDoubleValue());
+
+ // TODO
+ // Calculate where the user is in relation to the active runway and it's circuit
+ // and set the op-type as appropriate.
+
+ // HACK - to get up and running I'm going to assume that the user contacts tower on a staight-in final for now.
+ t->opType = STRAIGHT_IN;
+
+ t->plane.type = GA_SINGLE; // FIXME - Another assumption!
+ t->plane.callsign = ID;
+
+ appList.push_back(t); // Not necessarily permanent
+ AddToTrafficList(t);
}
+
void FGTower::RequestDepartureClearance(string ID) {
//cout << "Request Departure Clearance called...\n";
}
TTT_UNKNOWN, // departure, but we don't know if for circuits or leaving properly
STRAIGHT_IN
// Umm - what's the difference between INBOUND and STRAIGHT_IN ?
-};
+}; // TODO - need some differentiation of IFR and VFR traffic in order to give the former priority.
// Structure for holding details of a plane under tower control.
// Not fixed yet - may include more stuff later.
bool GetCrosswindConstraint(double& cpos);
bool GetDownwindConstraint(double& dpos);
bool GetBaseConstraint(double& bpos);
+
+ // Returns true if OK to transmit on this frequency
+ inline bool FreqClear() { return freqClear; }
+ // Indicate that the frequency is in use
+ inline void FreqInUse() { freqClear = false; }
+ // The idea is that AI traffic or the user ATC dialog box calls FreqInUse() when they begin transmitting,
+ // and that the tower control sets freqClear back to true following a reply.
+ // AI traffic should check FreqClear() is true prior to transmitting.
+ // The user will just have to wait for a gap in dialog as in real life.
private:
FGATCMgr* ATCmgr;
// Figure out if a given position lies on a runway or not
bool OnAnyRunway(Point3D pt);
- // Calculate the eta of each plane to the threshold.
+ // Calculate the eta of a plane to the threshold.
// For ground traffic this is the fastest they can get there.
// For air traffic this is the middle approximation.
+ void CalcETA(TowerPlaneRec* tpr);
+
+ // Iterate through all the lists and call CalcETA for all the planes.
void doThresholdETACalc();
// Order the list of traffic as per expected threshold use and flag any conflicts
bool doThresholdUseOrder();
+ // Calculate the crow-flys distance of a plane to the threshold in meters
+ double CalcDistOutM(TowerPlaneRec* tpr);
+
+ // Calculate the crow-flys distance of a plane to the threshold in miles
+ double CalcDistOutMiles(TowerPlaneRec* tpr);
+
void doCommunication();
void IssueLandingClearance(TowerPlaneRec* tpr);
bool display; // Flag to indicate whether we should be outputting to the ATC display.
bool displaying; // Flag to indicate whether we are outputting to the ATC display.
+ bool freqClear; // Flag to indicate if the frequency is clear of ongoing dialog
+
// environment - need to make sure we're getting the surface winds and not winds aloft.
SGPropertyNode* wind_from_hdg; //degrees
SGPropertyNode* wind_speed_knots; //knots
// or possibly another data structure with the positions of the inactive planes.
// Need a data structure to hold outstanding communications from aircraft.
- // Linked-list of planes on approach ordered with nearest first (timewise).
+ // Linked-list of planes on approach to active rwy ordered with nearest first (timewise).
// Includes planes that have landed but not yet vacated runway.
// Somewhat analagous to the paper strips used (used to be used?) in real life.
// Doesn't include planes in circuit until they turn onto base/final?
+ // TODO - may need to alter this for operation to more than one active rwy.
tower_plane_rec_list_type appList;
tower_plane_rec_list_iterator appListItr;
+
+ // What should we do with planes approaching the airport to join the circuit somewhere
+ // but not on straight-in though? - put them in here for now.
+ tower_plane_rec_list_type circuitAppList;
+ tower_plane_rec_list_iterator circuitAppListItr;
// List of departed planes (planes doing circuits go into circuitList not depList after departure)
tower_plane_rec_list_type depList;
// List of all planes due to use a given rwy arranged in projected order of rwy use
tower_plane_rec_list_type trafficList; // TODO - needs to be expandable to more than one rwy
tower_plane_rec_list_iterator trafficListItr;
+
+ // Returns true if successful
+ bool RemoveFromTrafficList(string id);
+
+ // Return the ETA of plane no. list_pos (1-based) in the traffic list.
+ // i.e. list_pos = 1 implies next to use runway.
+ double GetTrafficETA(unsigned int list_pos);
+
+ // Add a tower plane rec with ETA to the traffic list in the correct position ETA-wise.
+ // Returns true if this could cause a threshold ETA conflict with other traffic, false otherwise.
+ bool AddToTrafficList(TowerPlaneRec* t, bool holding = false);
// Ground can be separate or handled by tower in real life.
// In the program we will always use a separate FGGround class, but we need to know
projects / flightgear.git / commitdiff