src/Instrumentation/gps.hxx

   1 // gps.hxx - distance-measuring equipment.
   2 // Written by David Megginson, started 2003.
   3 //
   4 // This file is in the Public Domain and comes with no warranty.
   5
   6
   7 #ifndef __INSTRUMENTS_GPS_HXX
   8 #define __INSTRUMENTS_GPS_HXX 1
   9
  10 #ifndef __cplusplus
  11 # error This library requires C++
  12 #endif
  13
  14 #include <simgear/props/props.hxx>
  15 #include <simgear/structure/subsystem_mgr.hxx>
  16
  17
  18 /**
  19  * Model a GPS radio.
  20  *
  21  * Input properties:
  22  *
  23  * /position/longitude-deg
  24  * /position/latitude-deg
  25  * /position/altitude-ft
  26  * /environment/magnetic-variation-deg
  27  * /systems/electrical/outputs/gps
  28  * /instrumentation/gps/serviceable
  29  *
  30  * /instrumentation/gps/wp-longitude-deg
  31  * /instrumentation/gps/wp-latitude-deg
  32  * /instrumentation/gps/wp-ID
  33  * /instrumentation/gps/wp-name
  34  * /instrumentation/gps/course-deg
  35  * /instrumentation/gps/get-nearest-airport
  36  * /instrumentation/gps/waypoint-type
  37  *
  38  * Output properties:
  39  *
  40  * /instrumentation/gps/longitude-deg
  41  * /instrumentation/gps/latitude-deg
  42  * /instrumentation/gps/altitude-ft
  43  * /instrumentation/gps/track-true-deg
  44  * /instrumentation/gps/track-magnetic-deg
  45  * /instrumentation/gps/ground-speed-kt
  46  *
  47  * /instrumentation/gps/wp-distance-m
  48  * /instrumentation/gps/wp-bearing-deg
  49  * /instrumentation/gps/TTW
  50  * /instrumentation/gps/wp-bearing-deg
  51  * /instrumentation/gps/radials/actual-deg
  52  * /instrumentation/gps/course-deviation-deg
  53  * /instrumentation/gps/course-error-nm
  54  * /instrumentation/gps/to-flag
  55  * /instrumentation/gps/odometer
  56  * /instrumentation/gps/trip-odometer
  57  */
  58 class GPS : public SGSubsystem
  59 {
  60
  61 public:
  62
  63     GPS ();
  64     virtual ~GPS ();
  65
  66     virtual void init ();
  67     virtual void update (double delta_time_sec);
  68
  69 private:
  70
  71     void search (double frequency, double longitude_rad,
  72                  double latitude_rad, double altitude_m);
  73
  74     SGPropertyNode_ptr _longitude_node;
  75     SGPropertyNode_ptr _latitude_node;
  76     SGPropertyNode_ptr _altitude_node;
  77     SGPropertyNode_ptr _magvar_node;
  78     SGPropertyNode_ptr _serviceable_node;
  79     SGPropertyNode_ptr _electrical_node;
  80     SGPropertyNode_ptr _wp_longitude_node;
  81     SGPropertyNode_ptr _wp_latitude_node;
  82     SGPropertyNode_ptr _wp_ID_node;
  83     SGPropertyNode_ptr _wp_name_node;
  84     SGPropertyNode_ptr _wp_course_node;
  85     SGPropertyNode_ptr _get_nearest_airport_node;
  86     SGPropertyNode_ptr _waypoint_type_node;
  87
  88     SGPropertyNode_ptr _raim_node;
  89     SGPropertyNode_ptr _indicated_longitude_node;
  90     SGPropertyNode_ptr _indicated_latitude_node;
  91     SGPropertyNode_ptr _indicated_altitude_node;
  92     SGPropertyNode_ptr _true_track_node;
  93     SGPropertyNode_ptr _magnetic_track_node;
  94     SGPropertyNode_ptr _speed_node;
  95     SGPropertyNode_ptr _wp_distance_node;
  96     SGPropertyNode_ptr _wp_ttw_node;
  97     SGPropertyNode_ptr _wp_bearing_node;
  98     SGPropertyNode_ptr _wp_actual_radial_node;
  99     SGPropertyNode_ptr _wp_course_deviation_node;
 100     SGPropertyNode_ptr _wp_course_error_nm_node;
 101     SGPropertyNode_ptr _wp_to_flag_node;
 102     SGPropertyNode_ptr _odometer_node;
 103     SGPropertyNode_ptr _trip_odometer_node;
 104
 105     bool _last_valid;
 106     double _last_longitude_deg;
 107     double _last_latitude_deg;
 108     double _last_altitude_m;
 109     double _last_speed_kts;
 110
 111     double _wp_latitude;
 112     double _wp_longitude;
 113     string _last_wp_ID;
 114
 115 };
 116
 117
 118 #endif // __INSTRUMENTS_GPS_HXX