airspeed_indicator.hxx

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/*
 * SPDX-License-Identifier: CC0-1.0
 * 
 * airspeed_indicator.hxx - a regular ASI tied to the static port.
 * Written by David Megginson, started 2002.
 * Last modified by Eric van den Berg, 24 Nov 2012
 * 
 * This file is in the Public Domain and comes with no warranty.
*/
 
#pragma once
 
#ifndef __cplusplus
# error This library requires C++
#endif
 
#include <simgear/props/props.hxx>
#include <simgear/structure/subsystem_mgr.hxx>
 
// forward decls
class FGEnvironmentMgr;

class AirspeedIndicator : public SGSubsystem
{
public:
    AirspeedIndicator ( SGPropertyNode *node );
    virtual ~AirspeedIndicator ();
 
    // Subsystem API.
    void init() override;
    void reinit() override;
    void update(double dt) override;
 
    // Subsystem identification.
    static const char* staticSubsystemClassId() { return "airspeed-indicator"; }
 
private:
    void computeMach();
 
    std::string _name;
    unsigned int _num;
    std::string _total_pressure;
    std::string _static_pressure;
    bool _has_overspeed;
    std::string _pressure_alt_source;
    double _ias_limit;
    double _mach_limit;
    double _alt_threshold;
 
    SGPropertyNode_ptr _ias_limit_node;
    SGPropertyNode_ptr _mach_limit_node;
    SGPropertyNode_ptr _alt_threshold_node;
    SGPropertyNode_ptr _serviceable_node;
    SGPropertyNode_ptr _total_pressure_node;
    SGPropertyNode_ptr _static_pressure_node;
    SGPropertyNode_ptr _density_node;
    SGPropertyNode_ptr _speed_node;
    SGPropertyNode_ptr _airspeed_limit;
    SGPropertyNode_ptr _pressure_alt;
    SGPropertyNode_ptr _mach_node;
    SGPropertyNode_ptr _tas_node;
 
    FGEnvironmentMgr* _environmentManager;
};