src/Instrumentation/vertical_speed_indicator.hxx

   1 // vertical_speed_indicator.hxx - a regular VSI tied to the static port.
   2 // Written by David Megginson, started 2002.
   3 //
   4 // This file is in the Public Domain and comes with no warranty.
   5
   6
   7 #ifndef __INSTRUMENTS_VERTICAL_SPEED_INDICATOR_HXX
   8 #define __INSTRUMENTS_VERTICAL_SPEED_INDICATOR_HXX 1
   9
  10 #ifndef __cplusplus
  11 # error This library requires C++
  12 #endif
  13
  14 #include <simgear/misc/props.hxx>
  15 #include <Main/fgfs.hxx>
  16
  17
  18 /**
  19  * Model a non-instantaneous VSI tied to the static port.
  20  *
  21  * Input properties:
  22  *
  23  * /instrumentation/vertical-speed-indicator/serviceable
  24  * /systems/static[0]/pressure-inhg
  25  *
  26  * Output properties:
  27  *
  28  * /instrumentation/vertical-speed-indicator/indicated-speed-fpm
  29  */
  30 class VerticalSpeedIndicator : public FGSubsystem
  31 {
  32
  33 public:
  34
  35     VerticalSpeedIndicator ();
  36     virtual ~VerticalSpeedIndicator ();
  37
  38     virtual void init ();
  39     virtual void update (double dt);
  40
  41 private:
  42
  43     double _internal_pressure_inhg;
  44
  45     SGPropertyNode_ptr _serviceable_node;
  46     SGPropertyNode_ptr _pressure_node;
  47     SGPropertyNode_ptr _speed_node;
  48
  49 };
  50
  51 #endif // __INSTRUMENTS_VERTICAL_SPEED_INDICATOR_HXX