tacan.hxx

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/*
 * SPDX-License-Identifier: CC0-1.0
 * 
 * tacan.hxx - Models a TACAN (Tactical Air Navigation) Radio
 * Written by David Megginson, started 2003.
 * 
 * This file is in the Public Domain and comes with no warranty.
 * 
*/
 
 
 
#pragma once
 
#include <simgear/props/props.hxx>
#include <simgear/structure/subsystem_mgr.hxx>
 

class TACAN : public SGSubsystem,
              public SGPropertyChangeListener
{
public:
    TACAN(SGPropertyNode *node);
    virtual ~TACAN();
 
    // Subsystem API.
    void init() override;
    void reinit() override;
    void update(double delta_time_sec) override;
 
    // Subsystem identification.
    static const char* staticSubsystemClassId() { return "tacan"; }
 
private:
    void disabled(bool force = false);
 
    void search (double frequency, const SGGeod& pos);
    double searchChannel (const std::string& channel);
    void valueChanged (SGPropertyNode *);
 
    std::string _name;
    unsigned int _num;
 
    SGPropertyNode_ptr _heading_node;
    SGPropertyNode_ptr _serviceable_node;
    SGPropertyNode_ptr _electrical_node;
    SGPropertyNode_ptr _frequency_node;
    SGPropertyNode_ptr _display_node;
    SGPropertyNode_ptr _x_shift_node;
    SGPropertyNode_ptr _y_shift_node;
 
    SGPropertyNode_ptr _in_range_node;
    SGPropertyNode_ptr _distance_node;
    SGPropertyNode_ptr _speed_node;
    SGPropertyNode_ptr _time_node;
    SGPropertyNode_ptr _bearing_node;
    SGPropertyNode_ptr _ident_node;
    SGPropertyNode_ptr _name_node;
 
    SGPropertyNode_ptr _channel_node;
    SGPropertyNode_ptr _channel_in0_node;
    SGPropertyNode_ptr _channel_in1_node;
    SGPropertyNode_ptr _channel_in2_node;
    SGPropertyNode_ptr _channel_in3_node;
    SGPropertyNode_ptr _channel_in4_node;
 
    bool _was_disabled;
    bool _new_frequency;
    std::string _channel;
    double _last_distance_nm;
    double _frequency_mhz;
    double _time_before_search_sec;
 
    FGNavRecordRef _active_station;
 
    int _listener_active;
};