78 lines
1.8 KiB
C++
78 lines
1.8 KiB
C++
// gps.hxx - distance-measuring equipment.
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// Written by David Megginson, started 2003.
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//
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// This file is in the Public Domain and comes with no warranty.
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#ifndef __INSTRUMENTS_GPS_HXX
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#define __INSTRUMENTS_GPS_HXX 1
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#ifndef __cplusplus
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# error This library requires C++
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#endif
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#include <simgear/misc/props.hxx>
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#include <Main/fgfs.hxx>
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/**
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* Model a GPS radio.
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*
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* Input properties:
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*
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* /position/longitude-deg
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* /position/latitude-deg
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* /position/altitude-ft
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* /environment/magnetic-variation-deg
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* /systems/electrical/outputs/gps
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* /instrumentation/gps/serviceable
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*
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* Output properties:
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*
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* /instrumentation/gps/indicated-longitude-deg
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* /instrumentation/gps/indicated-latitude-deg
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* /instrumentation/gps/indicated-altitude-ft
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* /instrumentation/gps/indicated-track-true-deg
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* /instrumentation/gps/indicated-track-magnetic-deg
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* /instrumentation/gps/indicated-ground-speed-kt
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*/
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class GPS : public FGSubsystem
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{
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public:
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GPS ();
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virtual ~GPS ();
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virtual void init ();
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virtual void update (double delta_time_sec);
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private:
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void search (double frequency, double longitude_rad,
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double latitude_rad, double altitude_m);
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SGPropertyNode_ptr _longitude_node;
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SGPropertyNode_ptr _latitude_node;
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SGPropertyNode_ptr _altitude_node;
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SGPropertyNode_ptr _magvar_node;
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SGPropertyNode_ptr _serviceable_node;
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SGPropertyNode_ptr _electrical_node;
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SGPropertyNode_ptr _raim_node;
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SGPropertyNode_ptr _indicated_longitude_node;
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SGPropertyNode_ptr _indicated_latitude_node;
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SGPropertyNode_ptr _indicated_altitude_node;
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SGPropertyNode_ptr _true_track_node;
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SGPropertyNode_ptr _magnetic_track_node;
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SGPropertyNode_ptr _speed_node;
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bool _last_valid;
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double _last_longitude_deg;
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double _last_latitude_deg;
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double _last_altitude_m;
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};
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#endif // __INSTRUMENTS_GPS_HXX
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