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Added support for the slip-skid ball.

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This commit is contained in:
david 2003-01-25 21:13:13 +00:00
parent 8cc7b283d5
commit 99aa857dcb
4 changed files with 97 additions and 0 deletions
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1
src/Instrumentation/Makefile.am
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@ -6,6 +6,7 @@ libInstrumentation_a_SOURCES = instrument_mgr.cxx instrument_mgr.hxx \
attitude_indicator.cxx attitude_indicator.hxx \
altimeter.cxx altimeter.hxx \
turn_indicator.cxx turn_indicator.hxx \
slip_skid_ball.cxx slip_skid_ball.hxx \
heading_indicator.cxx heading_indicator.hxx \
vertical_speed_indicator.cxx vertical_speed_indicator.hxx

2
src/Instrumentation/instrument_mgr.cxx
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@ -9,6 +9,7 @@
#include "attitude_indicator.hxx"
#include "altimeter.hxx"
#include "turn_indicator.hxx"
#include "slip_skid_ball.hxx"
#include "heading_indicator.hxx"
#include "vertical_speed_indicator.hxx"
@ -19,6 +20,7 @@ FGInstrumentMgr::FGInstrumentMgr ()
set_subsystem("ai", new AttitudeIndicator);
set_subsystem("alt", new Altimeter);
set_subsystem("ti", new TurnIndicator);
set_subsystem("ball", new SlipSkidBall);
set_subsystem("hi", new HeadingIndicator);
set_subsystem("vsi", new VerticalSpeedIndicator);
}

40
src/Instrumentation/slip_skid_ball.cxx Normal file
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@ -0,0 +1,40 @@
// slip_skid_ball.cxx - an electric-powered turn indicator.
// Written by David Megginson, started 2003.
//
// This file is in the Public Domain and comes with no warranty.
#include "slip_skid_ball.hxx"
#include <Main/fg_props.hxx>
#include <Main/util.hxx>
SlipSkidBall::SlipSkidBall ()
{
}
SlipSkidBall::~SlipSkidBall ()
{
}
void
SlipSkidBall::init ()
{
_y_accel_node = fgGetNode("/orientation/roll-rate-degps", true);
_z_accel_node = fgGetNode("/orientation/yaw-rate-degps", true);
_out_node =
fgGetNode("/instrumentation/slip-skid-ball/indicated-slip-skid", true);
}
void
SlipSkidBall::update (double dt)
{
double d = -_z_accel_node->getDoubleValue();
if (d < 60.0) // originally 1 radian
d = 60.0;
double pos = _y_accel_node->getDoubleValue()/d;
pos = fgGetLowPass(_last_pos, pos, dt);
_last_pos = pos;
_out_node->setDoubleValue(pos);
}
// end of slip_skid_ball.cxx

54
src/Instrumentation/slip_skid_ball.hxx Normal file
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@ -0,0 +1,54 @@
// slip_skid_ball.hxx - an slip-skid ball.
// Written by David Megginson, started 2003.
//
// This file is in the Public Domain and comes with no warranty.
#ifndef __INSTRUMENTS_SLIP_SKID_BALL_HXX
#define __INSTRUMENTS_SLIP_SKID_BALL_HXX 1
#ifndef __cplusplus
# error This library requires C++
#endif
#include <simgear/misc/props.hxx>
#include <Main/fgfs.hxx>
#include "gyro.hxx"
/**
* Model a slip-skid ball.
*
* Input properties:
*
* /accelerations/pilot/y-accel-fps_sec
* /accelerations/pilot/z-accel-fps_sec
*
* Output properties:
*
* /instrumentation/slip-skid-ball/indicated-slip-skid
*/
class SlipSkidBall : public FGSubsystem
{
public:
SlipSkidBall ();
virtual ~SlipSkidBall ();
virtual void init ();
virtual void update (double dt);
private:
Gyro _gyro;
double _last_pos;
SGPropertyNode_ptr _y_accel_node;
SGPropertyNode_ptr _z_accel_node;
SGPropertyNode_ptr _out_node;
};
#endif // __INSTRUMENTS_SLIP_SKID_BALL_HXX