// approach.hxx -- Approach class // // Written by Alexander Kappes, started March 2002. // // Copyright (C) 2002 Alexander Kappes // // 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_APPROACH_HXX #define _FG_APPROACH_HXX #include #include #include #include #include #include #include #include
#ifdef SG_HAVE_STD_INCLUDES # include #include #elif defined( SG_HAVE_NATIVE_SGI_COMPILERS ) # include #elif defined( __BORLANDC__ ) # include #else # include #include #endif #if ! defined( SG_HAVE_NATIVE_SGI_COMPILERS ) SG_USING_STD(istream); #endif SG_USING_STD(string); #include "ATC.hxx" //DCL - a complete guess for now. #define FG_APPROACH_DEFAULT_RANGE 100 // Contains all information about a plane that the approach control needs const int max_planes = 20; // max number of planes on the stack const int max_wp = 10; // max number of waypoints for approach phase struct PlaneApp { // variables for plane if it's on the radar string ident; // indentification of plane double lon; // longitude in degrees double lat; // latitude in degrees double alt; // Altitute above sea level in feet double hdg; // heading of plane in degrees double dist; // distance to airport in miles double brg; // bearing relative to airport in degrees double spd; // speed above ground int contact; // contact with approach established? // 0 = no contact yet // 1 = in contact // 2 = handed off to tower // additional variables if contact has been established int wpn; // number of waypoints double wpts[max_wp][6]; // assigned waypoints for approach phase // first wp in list is airport // last waypoint point at which contact was established // second index: 0 = bearing to airport // second index: 1 = distance to aiport // second index: 2 = alt // second index: 3 = ETA // second index: 4 = heading to next waypoint // second index: 5 = distance to next waypoint double dnwp; // distance to next waypoint double dcc; // closest distance to current assigned course double dnc; // closest distance to course from next to next to next wp double aalt; // assigned alt at next waypoint double ahdg; // assigned heading bool on_crs; // is the plane on course? double tlm; // time when last message was sent }; class FGApproach : public FGATC { char type; double lon, lat; double elev; double x, y, z; int freq; int bucket; double range; string active_runway; double active_rw_hdg; bool display; // Flag to indicate whether we should be outputting to the display. bool displaying; // Flag to indicate whether we are outputting to the display. string ident; // Code of the airport its at. string name; // Name transmitted in the broadcast. int num_planes; // number of planes on the stack PlaneApp planes[max_planes]; // Array of planes string transmission; bool first; SGPropertyNode *comm1_node; SGPropertyNode *comm2_node; // for failure modeling string trans_ident; // transmitted ident bool approach_failed; // approach failed? public: FGApproach(void); ~FGApproach(void); void Init(); void Update(); // Add new plane to stack if not already registered // Input: pid - id of plane (name) // Output: "true" if added; "false" if already existend void AddPlane(string pid); // Remove plane from stack if out of range int RemovePlane(); //Indicate that this instance should be outputting to the ATC display inline void SetDisplay(void) {display = true;} //Indicate that this instance should not be outputting to the ATC display inline void SetNoDisplay(void) {display = false;} inline char get_type() const { return type; } inline double get_lon() const { return lon; } inline double get_lat() const { return lat; } inline double get_elev() const { return elev; } inline double get_x() const { return x; } inline double get_y() const { return y; } inline double get_z() const { return z; } inline double get_bucket() const { return bucket; } inline int get_freq() const { return freq; } inline double get_range() const { return range; } inline int get_pnum() const { return num_planes; } inline const char* GetIdent() { return ident.c_str(); } inline string get_trans_ident() { return trans_ident; } inline string get_name() { return name; } inline atc_type GetType() { return APPROACH; } private: void update_plane_dat(); void get_active_runway(); // ======================================================================== // get heading and distance between two points; point2 ---> point1 // input: point1 = heading in degrees, distance // input: point2 = heading in degrees, distance // ouput: course in degrees, distance // ======================================================================== void calc_hd_course_dist(const double &h1, const double &d1, const double &h2, const double &d2, double *course, double *dist); // ======================================================================== // closest distance between a point and a straigt line in 2 dim. // the input variables are given in (heading, distance) // relative to a common point // input: point = heading in degrees, distance // input: straigt line = anker vector (heading in degrees, distance), // heading of direction vector // output: distance // ======================================================================== double calc_psl_dist(const double &h1, const double &d1, const double &h2, const double &d2, const double &h3); // Pointers to current users position SGPropertyNode *lon_node; SGPropertyNode *lat_node; SGPropertyNode *elev_node; //Update the transmission string void UpdateTransmission(void); friend istream& operator>> ( istream&, FGApproach& ); }; inline istream& operator >> ( istream& in, FGApproach& a ) { double f; char ch; static bool first_time = true; static double julian_date = 0; static const double MJD0 = 2415020.0; if ( first_time ) { julian_date = sgTimeCurrentMJD(0, 0) + MJD0; first_time = false; } in >> a.type; if ( a.type == '[' ) return in >> skipeol; in >> a.lat >> a.lon >> a.elev >> f >> a.range >> a.ident; a.name = ""; in >> ch; a.name += ch; while(1) { //in >> noskipws in.unsetf(ios::skipws); in >> ch; a.name += ch; if((ch == '"') || (ch == 0x0A)) { break; } // we shouldn't need the 0x0A but it makes a nice safely in case someone leaves off the " } in.setf(ios::skipws); //cout << "approach.name = " << a.name << '\n'; a.freq = (int)(f*100.0 + 0.5); // generate cartesian coordinates Point3D geod( a.lon * SGD_DEGREES_TO_RADIANS , a.lat * SGD_DEGREES_TO_RADIANS, a.elev * SG_FEET_TO_METER ); Point3D cart = sgGeodToCart( geod ); a.x = cart.x(); a.y = cart.y(); a.z = cart.z(); // get bucket number SGBucket buck(a.lon, a.lat); a.bucket = buck.gen_index(); a.trans_ident = a.ident; a.approach_failed = false; return in >> skipeol; } #endif // _FG_APPROACH_HXX