// FGTower - a class to provide tower control at towered airports. // // Written by David Luff, started March 2002. // // Copyright (C) 2002 David C. Luff - david.luff@nottingham.ac.uk // // This program is free software; you can redistribute it and/or // modify it under the terms of the GNU General Public License as // published by the Free Software Foundation; either version 2 of the // License, or (at your option) any later version. // // This program is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // General Public License for more details. // // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. #ifndef _FG_TOWER_HXX #define _FG_TOWER_HXX #include #include #include //#include #include //#include #include STL_IOSTREAM #include STL_STRING SG_USING_STD(string); SG_USING_STD(ios); #include "ATC.hxx" //#include "ATCmgr.hxx" #include "ground.hxx" #include "ATCProjection.hxx" #include "AIPlane.hxx" //DCL - a complete guess for now. #define FG_TOWER_DEFAULT_RANGE 30 enum tower_traffic_type { CIRCUIT, INBOUND, OUTBOUND, 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. class TowerPlaneRec { public: TowerPlaneRec(); TowerPlaneRec(PlaneRec p); TowerPlaneRec(Point3D pt); TowerPlaneRec(PlaneRec p, Point3D pt); FGAIPlane* planePtr; // This might move to the planeRec eventually PlaneRec plane; Point3D pos; double eta; // seconds double dist_out; // meters from theshold bool clearedToLand; bool clearedToLineUp; bool clearedToTakeOff; // ought to add time cleared to depart so we can nag if necessary bool holdShortReported; bool longFinalReported; bool longFinalAcknowledged; bool finalReported; bool finalAcknowledged; bool onRwy; // is physically on the runway bool nextOnRwy; // currently projected by tower to be the next on the runway double clearanceCounter; // Hack for communication timing - counter since clearance requested in seconds // Type of operation the plane is doing tower_traffic_type opType; // Whereabouts in circuit if doing circuits PatternLeg leg; bool isUser; // true if this plane is the user }; typedef list < TowerPlaneRec* > tower_plane_rec_list_type; typedef tower_plane_rec_list_type::iterator tower_plane_rec_list_iterator; typedef tower_plane_rec_list_type::const_iterator tower_plane_rec_list_const_iterator; class FGTower : public FGATC { public: FGTower(); ~FGTower(); void Init(); void Update(double dt); void RequestLandingClearance(string ID); void RequestDepartureClearance(string ID); void ReportFinal(string ID); void ReportLongFinal(string ID); void ReportOuterMarker(string ID); void ReportMiddleMarker(string ID); void ReportInnerMarker(string ID); void ReportGoingAround(string ID); void ReportRunwayVacated(string ID); void ReportReadyForDeparture(string ID); // Contact tower when at a hold short for departure - for now we'll assume plane - maybe vehicles might want to cross runway eventually? void ContactAtHoldShort(PlaneRec plane, FGAIPlane* requestee, tower_traffic_type operation); // Public interface to the active runway - this will get more complex // in the future and consider multi-runway use, airplane weight etc. inline string GetActiveRunway() { return activeRwy; } inline RunwayDetails GetActiveRunwayDetails() { return rwy; } inline void SetDisplay() { display = true; } inline void SetNoDisplay() { display = false; } inline string get_trans_ident() { return trans_ident; } inline atc_type GetType() { return TOWER; } inline FGGround* GetGroundPtr() { return ground; } // Returns true if positions of crosswind/downwind/base leg turns should be constrained by previous traffic // plus the constraint position as a rwy orientated orthopos (meters) 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; // This is purely for synactic convienience to avoid writing globals->get_ATC_mgr()-> all through the code! // Figure out if a given position lies on the active runway // Might have to change when we consider more than one active rwy. bool OnActiveRunway(Point3D pt); // Figure out if a given position lies on a runway or not bool OnAnyRunway(Point3D pt); // 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); void IssueGoAround(TowerPlaneRec* tpr); void IssueDepartureClearance(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 double aptElev; // Airport elevation string activeRwy; // Active runway number - For now we'll disregard multiple / alternate runway operation. RunwayDetails rwy; // Assumed to be the active one for now. bool rwyOccupied; // Active runway occupied flag. For now we'll disregard land-and-hold-short operations. FGATCAlignedProjection ortho; // Orthogonal mapping of the local area with the active runway threshold at the origin // Figure out which runways are active. // For now we'll just be simple and do one active runway - eventually this will get much more complex // This is a private function - public interface to the results of this is through GetActiveRunway void DoRwyDetails(); // Need a data structure to hold details of the various active planes // 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 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; tower_plane_rec_list_iterator depListItr; // List of planes in the circuit (ordered by nearest to landing first) tower_plane_rec_list_type circuitList; tower_plane_rec_list_iterator circuitListItr; // List of planes waiting to depart tower_plane_rec_list_type holdList; tower_plane_rec_list_iterator holdListItr; // List of planes on rwy tower_plane_rec_list_type rwyList; tower_plane_rec_list_iterator rwyListItr; // 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 // whether it is supposed to be separate or not to give the correct instructions. bool separateGround; // true if ground control is separate FGGround* ground; // The ground control associated with this airport. // for failure modeling string trans_ident; // transmitted ident bool tower_failed; // tower failed? // Pointers to current users position and orientation SGPropertyNode* user_lon_node; SGPropertyNode* user_lat_node; SGPropertyNode* user_elev_node; SGPropertyNode* user_hdg_node; // Details of the general traffic flow etc in the circuit double crosswind_leg_pos; // Distance from threshold crosswind leg is being turned to in meters (actual operation - *not* ideal circuit) double downwind_leg_pos; // Actual offset distance in meters from the runway that planes are flying the downwind leg // Currently not sure whether the above should be always +ve or just take the natural orthopos sign (+ve for RH circuit, -ve for LH). double base_leg_pos; // Actual offset distance from the threshold (-ve) that planes are turning to base leg. friend istream& operator>> ( istream&, FGTower& ); }; #endif //_FG_TOWER_HXX