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