src/Instrumentation/dme.hxx

   1 // dme.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_DME_HXX
   8 #define __INSTRUMENTS_DME_HXX 1
   9
  10 #include <simgear/props/props.hxx>
  11 #include <simgear/structure/subsystem_mgr.hxx>
  12
  13 // forward decls
  14 class FGNavRecord;
  15
  16 /**
  17  * Model a DME radio.
  18  *
  19  * Input properties:
  20  *
  21  * /position/longitude-deg
  22  * /position/latitude-deg
  23  * /position/altitude-ft
  24  * /systems/electrical/outputs/dme
  25  * /instrumentation/"name"/serviceable
  26  * /instrumentation/"name"/frequencies/source
  27  * /instrumentation/"name"/frequencies/selected-mhz
  28  *
  29  * Output properties:
  30  *
  31  * /instrumentation/"name"/in-range
  32  * /instrumentation/"name"/indicated-distance-nm
  33  * /instrumentation/"name"/indicated-ground-speed-kt
  34  * /instrumentation/"name"/indicated-time-kt
  35  */
  36 class DME : public SGSubsystem
  37 {
  38
  39 public:
  40
  41     DME ( SGPropertyNode *node );
  42     virtual ~DME ();
  43
  44     virtual void init ();
  45     virtual void reinit ();
  46     virtual void update (double delta_time_sec);
  47
  48 private:
  49
  50     SGPropertyNode_ptr _serviceable_node;
  51     SGPropertyNode_ptr _electrical_node;
  52     SGPropertyNode_ptr _source_node;
  53     SGPropertyNode_ptr _frequency_node;
  54
  55     SGPropertyNode_ptr _in_range_node;
  56     SGPropertyNode_ptr _distance_node;
  57     SGPropertyNode_ptr _speed_node;
  58     SGPropertyNode_ptr _time_node;
  59     SGPropertyNode_ptr _ident_btn_node;
  60     SGPropertyNode_ptr _volume_node;
  61
  62     double _last_distance_nm;
  63     double _last_frequency_mhz;
  64     double _time_before_search_sec;
  65
  66     FGNavRecord * _navrecord;
  67
  68     std::string _name;
  69     int _num;
  70
  71     class AudioIdent * _audioIdent;
  72 };
  73
  74
  75 #endif // __INSTRUMENTS_DME_HXX