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
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;
+ // 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)