c7c9fd67aa
- Calculate line of sight distance instead of distance over ground - Do a nav cache update if carrier_nav.dat.gz timestamp has changed - Allow comments in carrier_nav.dat.gz - "Fix" range calculations (still does not take terrain/weather and other influences into account)
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
// dme.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_TACAN_HXX
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#define __INSTRUMENTS_TACAN_HXX 1
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#include <simgear/props/props.hxx>
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#include <simgear/structure/subsystem_mgr.hxx>
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/**
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* Model a TACAN 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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* /heading
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* /systems/electrical/outputs/TACAN
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* /instrumentation/"name"/serviceable
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* /instrumentation/"name"/frequencies/selected-mhz
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*
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* Output properties:
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*
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* /instrumentation/"name"/in-range
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* /instrumentation/"name"/indicated-distance-nm
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* /instrumentation/"name"/indicated-ground-speed-kt
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* /instrumentation/"name"/indicated-time-kt
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*/
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class TACAN : public SGSubsystem, public SGPropertyChangeListener
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{
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public:
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TACAN(SGPropertyNode *node);
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virtual ~TACAN();
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virtual void init ();
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virtual void reinit ();
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virtual void update (double delta_time_sec);
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private:
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void disabled(bool force = false);
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void search (double frequency, const SGGeod& pos);
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double searchChannel (const std::string& channel);
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void valueChanged (SGPropertyNode *);
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std::string _name;
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unsigned int _num;
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SGPropertyNode_ptr _heading_node;
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SGPropertyNode_ptr _serviceable_node;
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SGPropertyNode_ptr _electrical_node;
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SGPropertyNode_ptr _frequency_node;
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SGPropertyNode_ptr _display_node;
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SGPropertyNode_ptr _x_shift_node;
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SGPropertyNode_ptr _y_shift_node;
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SGPropertyNode_ptr _in_range_node;
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SGPropertyNode_ptr _distance_node;
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SGPropertyNode_ptr _speed_node;
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SGPropertyNode_ptr _time_node;
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SGPropertyNode_ptr _bearing_node;
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SGPropertyNode_ptr _ident_node;
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SGPropertyNode_ptr _name_node;
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SGPropertyNode_ptr _channel_node;
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SGPropertyNode_ptr _channel_in0_node;
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SGPropertyNode_ptr _channel_in1_node;
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SGPropertyNode_ptr _channel_in2_node;
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SGPropertyNode_ptr _channel_in3_node;
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SGPropertyNode_ptr _channel_in4_node;
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bool _was_disabled;
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bool _new_frequency;
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std::string _channel;
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double _last_distance_nm;
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double _frequency_mhz;
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double _time_before_search_sec;
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FGNavRecordRef _active_station;
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int _listener_active;
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};
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#endif // __INSTRUMENTS_TACAN_HXX
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