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flightgear/src/Instrumentation/altimeter.hxx

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// altimeter.hxx - an altimeter tied to the static port.
// Written by David Megginson, started 2002.
//
// This file is in the Public Domain and comes with no warranty.
#ifndef __INSTRUMENTS_ALTIMETER_HXX
#define __INSTRUMENTS_ALTIMETER_HXX 1
#ifndef __cplusplus
# error This library requires C++
#endif
#include <simgear/props/props.hxx>
#include <simgear/structure/subsystem_mgr.hxx>
class SGInterpTable;
/**
* Model a barometric altimeter tied to the static port.
*
* Input properties:
*
* /instrumentation/altimeter/serviceable
* /instrumentation/altimeter/setting-inhg
* /systems/static[0]/pressure-inhg
*
* Output properties:
*
* /instrumentation/altimeter/indicated-altitude-ft
*/
class Altimeter : public SGSubsystem
{
public:
Altimeter ();
virtual ~Altimeter ();
virtual void init ();
virtual void update (double dt);
private:
SGPropertyNode_ptr _serviceable_node;
SGPropertyNode_ptr _setting_node;
SGPropertyNode_ptr _pressure_node;
SGPropertyNode_ptr _altitude_node;
SGInterpTable * _altitude_table;
};
#endif // __INSTRUMENTS_ALTIMETER_HXX