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 #include <Sound/morse.hxx>
  21
  22 using std::string;
  23
  24
  25 /**
  26  * Model an ADF radio.
  27  *
  28  * Input properties:
  29  *
  30  * /position/longitude-deg
  31  * /position/latitude-deg
  32  * /position/altitude-ft
  33  * /orientation/heading-deg
  34  * /systems/electrical/outputs/adf
  35  * /instrumentation/adf/serviceable
  36  * /instrumentation/adf/error-deg
  37  * /instrumentation/adf/frequencies/selected-khz
  38  * /instrumentation/adf/mode
  39  * /instrumentation/adf/ident-audible
  40  * /instrumentation/adf/volume-norm
  41  *
  42  * Output properties:
  43  *
  44  * /instrumentation/adf/in-range
  45  * /instrumentation/adf/indicated-bearing-deg
  46  * /instrumentation/adf/ident
  47  */
  48 class ADF : public SGSubsystem
  49 {
  50
  51 public:
  52
  53     ADF ( SGPropertyNode *node );
  54     virtual ~ADF ();
  55
  56     virtual void init ();
  57     virtual void update (double delta_time_sec);
  58
  59 private:
  60
  61     void set_bearing (double delta_time_sec, double bearing);
  62
  63     void search (double frequency, double longitude_rad,
  64                  double latitude_rad, double altitude_m);
  65
  66     string _name;
  67     unsigned int _num;
  68
  69     SGPropertyNode_ptr _longitude_node;
  70     SGPropertyNode_ptr _latitude_node;
  71     SGPropertyNode_ptr _altitude_node;
  72     SGPropertyNode_ptr _heading_node;
  73     SGPropertyNode_ptr _serviceable_node;
  74     SGPropertyNode_ptr _error_node;
  75     SGPropertyNode_ptr _electrical_node;
  76     SGPropertyNode_ptr _frequency_node;
  77     SGPropertyNode_ptr _mode_node;
  78
  79     SGPropertyNode_ptr _in_range_node;
  80     SGPropertyNode_ptr _bearing_node;
  81     SGPropertyNode_ptr _ident_node;
  82     SGPropertyNode_ptr _ident_audible_node;
  83     SGPropertyNode_ptr _volume_node;
  84
  85     double _time_before_search_sec;
  86
  87     int _last_frequency_khz;
  88     bool _transmitter_valid;
  89     string _last_ident;
  90     SGGeod _transmitter_pos;
  91     SGVec3d _transmitter_cart;
  92     double _transmitter_range_nm;
  93
  94     FGMorse morse;
  95     int _ident_count;
  96     time_t _last_ident_time;
  97     double _last_volume;
  98     string _adf_ident;
  99 };
 100
 101
 102 #endif // __INSTRUMENTS_ADF_HXX