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flightgear/src/Instrumentation/vertical_speed_indicator.hxx

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// vertical_speed_indicator.hxx - a regular VSI 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_VERTICAL_SPEED_INDICATOR_HXX
#define __INSTRUMENTS_VERTICAL_SPEED_INDICATOR_HXX 1
#ifndef __cplusplus
# error This library requires C++
#endif
#include <simgear/props/props.hxx>
#include <simgear/structure/subsystem_mgr.hxx>
/**
* Model a non-instantaneous VSI tied to the static port.
*
* Input properties:
*
* /instrumentation/vertical-speed-indicator/serviceable
* /systems/static[0]/pressure-inhg
*
* Output properties:
*
* /instrumentation/vertical-speed-indicator/indicated-speed-fpm
*/
class VerticalSpeedIndicator : public SGSubsystem
{
public:
VerticalSpeedIndicator ();
virtual ~VerticalSpeedIndicator ();
virtual void init ();
virtual void update (double dt);
private:
double _internal_pressure_inhg;
SGPropertyNode_ptr _serviceable_node;
SGPropertyNode_ptr _pressure_node;
SGPropertyNode_ptr _speed_node;
};
#endif // __INSTRUMENTS_VERTICAL_SPEED_INDICATOR_HXX