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 <simgear/math/SGMath.hxx>
  20
  21 class SGSampleGroup;
  22
  23 /**
  24  * Model an ADF radio.
  25  *
  26  * Input properties:
  27  *
  28  * /position/longitude-deg
  29  * /position/latitude-deg
  30  * /position/altitude-ft
  31  * /orientation/heading-deg
  32  * /systems/electrical/outputs/adf
  33  * /instrumentation/adf/serviceable
  34  * /instrumentation/adf/error-deg
  35  * /instrumentation/adf/frequencies/selected-khz
  36  * /instrumentation/adf/mode
  37  * /instrumentation/adf/ident-audible
  38  * /instrumentation/adf/volume-norm
  39  *
  40  * Output properties:
  41  *
  42  * /instrumentation/adf/in-range
  43  * /instrumentation/adf/indicated-bearing-deg
  44  * /instrumentation/adf/ident
  45  */
  46 class ADF : public SGSubsystem
  47 {
  48
  49 public:
  50
  51     ADF ( SGPropertyNode *node );
  52     virtual ~ADF ();
  53
  54     virtual void init ();
  55     virtual void update (double delta_time_sec);
  56
  57 private:
  58
  59     void set_bearing (double delta_time_sec, double bearing);
  60
  61     void search (double frequency, const SGGeod& pos);
  62
  63     std::string _name;
  64     unsigned int _num;
  65
  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     SGPropertyNode_ptr _ident_audible_node;
  77     SGPropertyNode_ptr _volume_node;
  78     SGPropertyNode_ptr _power_btn_node;
  79     SGPropertyNode_ptr _operable_node;
  80
  81     double _time_before_search_sec;
  82
  83     int _last_frequency_khz;
  84     bool _transmitter_valid;
  85     std::string _last_ident;
  86     SGGeod _transmitter_pos;
  87     SGVec3d _transmitter_cart;
  88     double _transmitter_range_nm;
  89
  90     int _ident_count;
  91     time_t _last_ident_time;
  92     float _last_volume;
  93     std::string _adf_ident;
  94
  95     SGSharedPtr<SGSampleGroup> _sgr;
  96 };
  97
  98
  99 #endif // __INSTRUMENTS_ADF_HXX