src/Instrumentation/adf.hxx

   1 // adf.hxx - automatic direction finder.
   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_ADF_HXX
   8 #define __INSTRUMENTS_ADF_HXX 1
   9
  10 #ifndef __cplusplus
  11 # error This library requires C++
  12 #endif
  13
  14 #include <string>
  15
  16 #include <simgear/math/point3d.hxx>
  17 #include <simgear/props/props.hxx>
  18
  19 #include <simgear/structure/subsystem_mgr.hxx>
  20
  21 SG_USING_STD(string);
  22
  23
  24 /**
  25  * Model an ADF radio.
  26  *
  27  * Input properties:
  28  *
  29  * /position/longitude-deg
  30  * /position/latitude-deg
  31  * /position/altitude-ft
  32  * /orientation/heading-deg
  33  * /systems/electrical/outputs/adf
  34  * /instrumentation/adf/serviceable
  35  * /instrumentation/adf/error-deg
  36  * /instrumentation/adf/frequencies/selected-khz
  37  * /instrumentation/adf/mode
  38  *
  39  * Output properties:
  40  *
  41  * /instrumentation/adf/in-range
  42  * /instrumentation/adf/indicated-bearing-deg
  43  * /instrumentation/adf/ident
  44  */
  45 class ADF : public SGSubsystem
  46 {
  47
  48 public:
  49
  50     ADF ();
  51     virtual ~ADF ();
  52
  53     virtual void init ();
  54     virtual void update (double delta_time_sec);
  55
  56 private:
  57
  58     void set_bearing (double delta_time_sec, double bearing);
  59
  60     void search (double frequency, double longitude_rad,
  61                  double latitude_rad, double altitude_m);
  62
  63     SGPropertyNode_ptr _longitude_node;
  64     SGPropertyNode_ptr _latitude_node;
  65     SGPropertyNode_ptr _altitude_node;
  66     SGPropertyNode_ptr _heading_node;
  67     SGPropertyNode_ptr _serviceable_node;
  68     SGPropertyNode_ptr _error_node;
  69     SGPropertyNode_ptr _electrical_node;
  70     SGPropertyNode_ptr _frequency_node;
  71     SGPropertyNode_ptr _mode_node;
  72
  73     SGPropertyNode_ptr _in_range_node;
  74     SGPropertyNode_ptr _bearing_node;
  75     SGPropertyNode_ptr _ident_node;
  76
  77     double _time_before_search_sec;
  78
  79     int _last_frequency_khz;
  80     bool _transmitter_valid;
  81     string _last_ident;
  82     Point3D _transmitter;
  83     double _transmitter_lon_deg;
  84     double _transmitter_lat_deg;
  85     double _transmitter_elevation_ft;
  86     double _transmitter_range_nm;
  87
  88 };
  89
  90
  91 #endif // __INSTRUMENTS_ADF_HXX