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/props/props.hxx>
  15
  16 #include <Main/fgfs.hxx>
  17
  18
  19 /**
  20  * Model a non-instantaneous VSI tied to the static port.
  21  *
  22  * Input properties:
  23  *
  24  * /instrumentation/vertical-speed-indicator/serviceable
  25  * /systems/static[0]/pressure-inhg
  26  *
  27  * Output properties:
  28  *
  29  * /instrumentation/vertical-speed-indicator/indicated-speed-fpm
  30  */
  31 class VerticalSpeedIndicator : public FGSubsystem
  32 {
  33
  34 public:
  35
  36     VerticalSpeedIndicator ();
  37     virtual ~VerticalSpeedIndicator ();
  38
  39     virtual void init ();
  40     virtual void update (double dt);
  41
  42 private:
  43
  44     double _internal_pressure_inhg;
  45
  46     SGPropertyNode_ptr _serviceable_node;
  47     SGPropertyNode_ptr _pressure_node;
  48     SGPropertyNode_ptr _speed_node;
  49
  50 };
  51
  52 #endif // __INSTRUMENTS_VERTICAL_SPEED_INDICATOR_HXX