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/props/props.hxx>
  17
  18 #include <simgear/structure/subsystem_mgr.hxx>
  19 #include <Sound/morse.hxx>
  20
  21 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  * /instrumentation/adf/ident-audible
  39  * /instrumentation/adf/volume-norm
  40  *
  41  * Output properties:
  42  *
  43  * /instrumentation/adf/in-range
  44  * /instrumentation/adf/indicated-bearing-deg
  45  * /instrumentation/adf/ident
  46  */
  47 class ADF : public SGSubsystem
  48 {
  49
  50 public:
  51
  52     ADF ( SGPropertyNode *node );
  53     virtual ~ADF ();
  54
  55     virtual void init ();
  56     virtual void update (double delta_time_sec);
  57
  58 private:
  59
  60     void set_bearing (double delta_time_sec, double bearing);
  61
  62     void search (double frequency, double longitude_rad,
  63                  double latitude_rad, double altitude_m);
  64
  65     string _name;
  66     unsigned int _num;
  67
  68     SGPropertyNode_ptr _longitude_node;
  69     SGPropertyNode_ptr _latitude_node;
  70     SGPropertyNode_ptr _altitude_node;
  71     SGPropertyNode_ptr _heading_node;
  72     SGPropertyNode_ptr _serviceable_node;
  73     SGPropertyNode_ptr _error_node;
  74     SGPropertyNode_ptr _electrical_node;
  75     SGPropertyNode_ptr _frequency_node;
  76     SGPropertyNode_ptr _mode_node;
  77
  78     SGPropertyNode_ptr _in_range_node;
  79     SGPropertyNode_ptr _bearing_node;
  80     SGPropertyNode_ptr _ident_node;
  81     SGPropertyNode_ptr _ident_audible_node;
  82     SGPropertyNode_ptr _volume_node;
  83
  84     double _time_before_search_sec;
  85
  86     int _last_frequency_khz;
  87     bool _transmitter_valid;
  88     string _last_ident;
  89     SGGeod _transmitter_pos;
  90     SGVec3d _transmitter_cart;
  91     double _transmitter_range_nm;
  92
  93     FGMorse morse;
  94     int _ident_count;
  95     time_t _last_ident_time;
  96     double _last_volume;
  97     string _adf_ident;
  98 };
  99
 100
 101 #endif // __INSTRUMENTS_ADF_HXX