From: daveluff Date: Fri, 19 Sep 2003 16:51:27 +0000 (+0000) Subject: Further progress towards interactive tower control. Very much an initial stab at... X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=6e73e7dc080fe66d395ac20270128cf52723d6f8;p=flightgear.git Further progress towards interactive tower control. Very much an initial stab at a first iteration of a tricky problem, ie don't look too closely - some of it is ugly! --- diff --git a/src/ATC/tower.cxx b/src/ATC/tower.cxx index 4819cfe20..b84ba6ba6 100644 --- a/src/ATC/tower.cxx +++ b/src/ATC/tower.cxx @@ -43,6 +43,8 @@ longFinalReported(false), longFinalAcknowledged(false), finalReported(false), finalAcknowledged(false), +onRwy(false), +nextOnRwy(false), opType(TTT_UNKNOWN), leg(LEG_UNKNOWN), isUser(false) @@ -59,6 +61,8 @@ longFinalReported(false), longFinalAcknowledged(false), finalReported(false), finalAcknowledged(false), +onRwy(false), +nextOnRwy(false), opType(TTT_UNKNOWN), leg(LEG_UNKNOWN), isUser(false) @@ -75,6 +79,8 @@ longFinalReported(false), longFinalAcknowledged(false), finalReported(false), finalAcknowledged(false), +onRwy(false), +nextOnRwy(false), opType(TTT_UNKNOWN), leg(LEG_UNKNOWN), isUser(false) @@ -92,6 +98,8 @@ longFinalReported(false), longFinalAcknowledged(false), finalReported(false), finalAcknowledged(false), +onRwy(false), +nextOnRwy(false), opType(TTT_UNKNOWN), leg(LEG_UNKNOWN), isUser(false) @@ -116,6 +124,8 @@ FGTower::FGTower() { rwyListItr = rwyList.begin(); circuitListItr = circuitList.begin(); trafficListItr = trafficList.begin(); + + freqClear = true; } FGTower::~FGTower() { @@ -192,6 +202,7 @@ void FGTower::Init() { // 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; @@ -258,9 +269,79 @@ void FGTower::Update(double dt) { 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; @@ -282,17 +363,64 @@ void FGTower::Update(double dt) { 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()) { @@ -313,10 +441,14 @@ void FGTower::Update(double dt) { 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!!! @@ -365,9 +497,10 @@ void FGTower::Update(double dt) { 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) { @@ -408,6 +541,8 @@ void FGTower::Update(double dt) { //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 { @@ -464,6 +599,29 @@ void FGTower::Update(double dt) { } } + // 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) { @@ -633,71 +791,198 @@ bool FGTower::OnAnyRunway(Point3D pt) { } -// 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; @@ -709,8 +994,20 @@ void FGTower::ContactAtHoldShort(PlaneRec plane, FGAIPlane* requestee, tower_tra 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'; @@ -719,7 +1016,31 @@ void FGTower::ContactAtHoldShort(PlaneRec plane, FGAIPlane* requestee, tower_tra 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"; } diff --git a/src/ATC/tower.hxx b/src/ATC/tower.hxx index 7e44c4df1..db0899c0f 100644 --- a/src/ATC/tower.hxx +++ b/src/ATC/tower.hxx @@ -50,7 +50,7 @@ enum tower_traffic_type { 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. @@ -141,6 +141,15 @@ public: 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; @@ -153,14 +162,23 @@ private: // 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); @@ -170,6 +188,8 @@ private: 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 @@ -189,12 +209,18 @@ private: // 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; @@ -215,6 +241,17 @@ private: // 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