adf.hxx

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/*
 * SPDX-License-Identifier: CC0-1.0
 * 
 * adf.hxx - automatic direction finder.
 * Written by David Megginson, started 2003.
 * Last modified by Eric van den Berg, 24 Nov 2012
 * 
 * This file is in the Public Domain and comes with no warranty.
*/
 
#pragma once
 
#include <string>
 
#include <Instrumentation/AbstractInstrument.hxx>
#include <simgear/math/SGMath.hxx>
 
class SGSampleGroup;

class ADF : public AbstractInstrument
{
public:
    ADF ( SGPropertyNode *node );
    virtual ~ADF ();
 
    // Subsystem API.
    void init() override;
    void update(double delta_time_sec) override;
 
    // Subsystem identification.
    static const char* staticSubsystemClassId() { return "adf"; }
 
private:
    void set_bearing (double delta_time_sec, double bearing);
 
    void search (double frequency, const SGGeod& pos);
 
    SGPropertyNode_ptr _heading_node;
    SGPropertyNode_ptr _error_node;
    SGPropertyNode_ptr _frequency_node;
    SGPropertyNode_ptr _mode_node;
 
    SGPropertyNode_ptr _in_range_node;
    SGPropertyNode_ptr _bearing_node;
    SGPropertyNode_ptr _ident_node;
    SGPropertyNode_ptr _ident_audible_node;
    SGPropertyNode_ptr _volume_node;
 
    double _time_before_search_sec;
 
    int _last_frequency_khz;
    bool _transmitter_valid;
    std::string _last_ident;
    SGGeod _transmitter_pos;
    SGVec3d _transmitter_cart;
    double _transmitter_range_nm;
 
    int _ident_count;
    time_t _last_ident_time;
    float _last_volume;
    std::string _adf_ident;
 
    SGSharedPtr<SGSampleGroup> _sgr;
};