Detailed Description

JSBSim Base class.

This class provides universal constants, utility functions, messaging functions, and enumerated constants to JSBSim.

Author: Jon S. Berndt

Definition at line 118 of file FGJSBBase.h.

#include <FGJSBBase.h>

Inheritance diagram for FGJSBBase:

Collaboration diagram for FGJSBBase:

Classes
class	Filter
	First order, (low pass / lag) filter. More...

Public Member Functions
	FGJSBBase ()
	Constructor for FGJSBBase.

virtual	~FGJSBBase ()
	Destructor for FGJSBBase.

JSBSim console output highlighting terms.
enum	{ eL = 1 , eM , eN }
	Moments L, M, N.

enum	{ eP = 1 , eQ , eR }
	Rates P, Q, R.

enum	{ eU = 1 , eV , eW }
	Velocities U, V, W.

enum	{ eX = 1 , eY , eZ }
	Positions X, Y, Z.

enum	{ ePhi = 1 , eTht , ePsi }
	Euler angles Phi, Theta, Psi.

enum	{ eDrag = 1 , eSide , eLift }
	Stability axis forces, Drag, Side force, Lift.

enum	{ eRoll = 1 , ePitch , eYaw }
	Local frame orientation Roll, Pitch, Yaw.

enum	{ eNorth = 1 , eEast , eDown }
	Local frame position North, East, Down.

enum	{ eLat = 1 , eLong , eRad }
	Locations Radius, Latitude, Longitude.

enum	{ inNone = 0 , inDegrees , inRadians , inMeters , inFeet }
	Conversion specifiers.

static char	highint [5] = {27, '[', '1', 'm', '\0' }
	highlights text

static char	halfint [5] = {27, '[', '2', 'm', '\0' }
	low intensity text

static char	normint [6] = {27, '[', '2', '2', 'm', '\0' }
	normal intensity text

static char	reset [5] = {27, '[', '0', 'm', '\0' }
	resets text properties

static char	underon [5] = {27, '[', '4', 'm', '\0' }
	underlines text

static char	underoff [6] = {27, '[', '2', '4', 'm', '\0' }
	underline off

static char	fgblue [6] = {27, '[', '3', '4', 'm', '\0' }
	blue text

static char	fgcyan [6] = {27, '[', '3', '6', 'm', '\0' }
	cyan text

static char	fgred [6] = {27, '[', '3', '1', 'm', '\0' }
	red text

static char	fggreen [6] = {27, '[', '3', '2', 'm', '\0' }
	green text

static char	fgdef [6] = {27, '[', '3', '9', 'm', '\0' }
	default text

static short	debug_lvl = 1

static constexpr double	radtodeg = 180. / M_PI

static constexpr double	degtorad = M_PI / 180.

static constexpr double	hptoftlbssec = 550.0

static constexpr double	psftoinhg = 0.014138

static constexpr double	psftopa = 47.88

static constexpr double	fttom = 0.3048

static constexpr double	ktstofps = 1852./(3600*fttom)

static constexpr double	fpstokts = 1.0 / ktstofps

static constexpr double	inchtoft = 1.0/12.0

static constexpr double	m3toft3 = 1.0/(fttomfttomfttom)

static constexpr double	in3tom3 = inchtoftinchtoftinchtoft/m3toft3

static constexpr double	inhgtopa = 3386.38

static constexpr double	slugtolb = 32.174049
	Note that definition of lbtoslug by the inverse of slugtolb and not to a different constant you can also get from some tables will make lbtoslug*slugtolb == 1 up to the magnitude of roundoff. More...

static constexpr double	lbtoslug = 1.0/slugtolb

static constexpr double	kgtolb = 2.20462

static constexpr double	kgtoslug = 0.06852168

static const std::string	needed_cfg_version = "2.0"

static const std::string	JSBSim_version = JSBSIM_VERSION " " __DATE__ " " __TIME__

void	disableHighLighting (void)
	Disables highlighting in the console output.

static const std::string &	GetVersion (void)
	Returns the version number of JSBSim. More...

static constexpr double	KelvinToFahrenheit (double kelvin)
	Converts from degrees Kelvin to degrees Fahrenheit. More...

static constexpr double	CelsiusToRankine (double celsius)
	Converts from degrees Celsius to degrees Rankine. More...

static constexpr double	RankineToCelsius (double rankine)
	Converts from degrees Rankine to degrees Celsius. More...

static constexpr double	KelvinToRankine (double kelvin)
	Converts from degrees Kelvin to degrees Rankine. More...

static constexpr double	RankineToKelvin (double rankine)
	Converts from degrees Rankine to degrees Kelvin. More...

static constexpr double	FahrenheitToCelsius (double fahrenheit)
	Converts from degrees Fahrenheit to degrees Celsius. More...

static constexpr double	CelsiusToFahrenheit (double celsius)
	Converts from degrees Celsius to degrees Fahrenheit. More...

static constexpr double	CelsiusToKelvin (double celsius)
	Converts from degrees Celsius to degrees Kelvin. More...

static constexpr double	KelvinToCelsius (double kelvin)
	Converts from degrees Kelvin to degrees Celsius. More...

static constexpr double	FeetToMeters (double measure)
	Converts from feet to meters. More...

static bool	EqualToRoundoff (double a, double b)
	Finite precision comparison. More...

static bool	EqualToRoundoff (float a, float b)
	Finite precision comparison. More...

static bool	EqualToRoundoff (float a, double b)
	Finite precision comparison. More...

static bool	EqualToRoundoff (double a, float b)
	Finite precision comparison. More...

static constexpr double	Constrain (double min, double value, double max)
	Constrain a value between a minimum and a maximum value.

static constexpr double	sign (double num)

static std::string	CreateIndexedPropertyName (const std::string &Property, int index)

Member Function Documentation

◆ CelsiusToFahrenheit()

static constexpr double CelsiusToFahrenheit ( double celsius )

inlinestaticconstexpr

Converts from degrees Celsius to degrees Fahrenheit.

Parameters

celsius The temperature in degrees Celsius.

Returns: The temperature in Fahrenheit.

Definition at line 228 of file FGJSBBase.h.

                                                                {
     return celsius * 1.8 + 32.0;
   }

◆ CelsiusToKelvin()

static constexpr double CelsiusToKelvin ( double celsius )

inlinestaticconstexpr

Converts from degrees Celsius to degrees Kelvin.

Parameters

celsius The temperature in degrees Celsius.

Returns: The temperature in Kelvin.

Definition at line 235 of file FGJSBBase.h.

                                                            {
     return celsius + 273.15;
   }

◆ CelsiusToRankine()

static constexpr double CelsiusToRankine ( double celsius )

inlinestaticconstexpr

Converts from degrees Celsius to degrees Rankine.

Parameters

celsius The temperature in degrees Celsius.

Returns: The temperature in Rankine.

Definition at line 193 of file FGJSBBase.h.

                                                             {
     return celsius * 1.8 + 491.67;
   }

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◆ EqualToRoundoff() [1/4]

static bool EqualToRoundoff	(	double	a,
		double	b
	)

inlinestatic

Finite precision comparison.

Parameters

a	first value to compare
b	second value to compare

Returns: if the two values can be considered equal up to roundoff

Definition at line 257 of file FGJSBBase.h.

                                                   {
     double eps = 2.0*DBL_EPSILON;
     return std::fabs(a - b) <= eps * std::max<double>(std::fabs(a), std::fabs(b));
   }

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◆ EqualToRoundoff() [2/4]

static bool EqualToRoundoff	(	double	a,
		float	b
	)

inlinestatic

Finite precision comparison.

Parameters

a	first value to compare
b	second value to compare

Returns: if the two values can be considered equal up to roundoff

Definition at line 283 of file FGJSBBase.h.

                                                  {
     return EqualToRoundoff((float)a, b);
   }

◆ EqualToRoundoff() [3/4]

static bool EqualToRoundoff	(	float	a,
		double	b
	)

inlinestatic

Finite precision comparison.

Parameters

a	first value to compare
b	second value to compare

Returns: if the two values can be considered equal up to roundoff

Definition at line 275 of file FGJSBBase.h.

                                                  {
     return EqualToRoundoff(a, (float)b);
   }

◆ EqualToRoundoff() [4/4]

static bool EqualToRoundoff	(	float	a,
		float	b
	)

inlinestatic

Finite precision comparison.

Parameters

a	first value to compare
b	second value to compare

Returns: if the two values can be considered equal up to roundoff

Definition at line 266 of file FGJSBBase.h.

                                                 {
     float eps = 2.0*FLT_EPSILON;
     return std::fabs(a - b) <= eps * std::max<double>(std::fabs(a), std::fabs(b));
   }

◆ FahrenheitToCelsius()

static constexpr double FahrenheitToCelsius ( double fahrenheit )

inlinestaticconstexpr

Converts from degrees Fahrenheit to degrees Celsius.

Parameters

fahrenheit The temperature in degrees Fahrenheit.

Returns: The temperature in Celsius.

Definition at line 221 of file FGJSBBase.h.

                                                                   {
     return (fahrenheit - 32.0)/1.8;
   }

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◆ FeetToMeters()

static constexpr double FeetToMeters ( double measure )

inlinestaticconstexpr

Converts from feet to meters.

Parameters

measure The length in feet.

Returns: The length in meters.

Definition at line 249 of file FGJSBBase.h.

                                                         {
     return measure*0.3048;
   }

◆ GetVersion()

static const std::string& GetVersion ( void )

inlinestatic

Returns the version number of JSBSim.

Returns: The version number of JSBSim.

Definition at line 176 of file FGJSBBase.h.

176 {return JSBSim_version;}

◆ KelvinToCelsius()

static constexpr double KelvinToCelsius ( double kelvin )

inlinestaticconstexpr

Converts from degrees Kelvin to degrees Celsius.

Parameters

celsius The temperature in degrees Kelvin.

Returns: The temperature in Celsius.

Definition at line 242 of file FGJSBBase.h.

                                                           {
     return kelvin - 273.15;
   }

◆ KelvinToFahrenheit()

static constexpr double KelvinToFahrenheit ( double kelvin )

inlinestaticconstexpr

Converts from degrees Kelvin to degrees Fahrenheit.

Parameters

kelvin The temperature in degrees Kelvin.

Returns: The temperature in Fahrenheit.

Definition at line 186 of file FGJSBBase.h.

                                                              {
     return 1.8*kelvin - 459.4;
   }

◆ KelvinToRankine()

static constexpr double KelvinToRankine ( double kelvin )

inlinestaticconstexpr

Converts from degrees Kelvin to degrees Rankine.

Parameters

kelvin The temperature in degrees Kelvin.

Returns: The temperature in Rankine.

Definition at line 207 of file FGJSBBase.h.

                                                           {
     return kelvin * 1.8;
   }

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◆ RankineToCelsius()

static constexpr double RankineToCelsius ( double rankine )

inlinestaticconstexpr

Converts from degrees Rankine to degrees Celsius.

Parameters

rankine The temperature in degrees Rankine.

Returns: The temperature in Celsius.

Definition at line 200 of file FGJSBBase.h.

                                                             {
     return (rankine - 491.67)/1.8;
   }

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◆ RankineToKelvin()

static constexpr double RankineToKelvin ( double rankine )

inlinestaticconstexpr

Converts from degrees Rankine to degrees Kelvin.

Parameters

rankine The temperature in degrees Rankine.

Returns: The temperature in Kelvin.

Definition at line 214 of file FGJSBBase.h.

                                                            {
     return rankine/1.8;
   }

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Member Data Documentation

◆ slugtolb

constexpr double slugtolb = 32.174049

staticconstexprprotected

Note that definition of lbtoslug by the inverse of slugtolb and not to a different constant you can also get from some tables will make lbtoslug*slugtolb == 1 up to the magnitude of roundoff.

So converting from slug to lb and back will yield to the original value you started with up to the magnitude of roundoff. Taken from units gnu commandline tool

Definition at line 314 of file FGJSBBase.h.

The documentation for this class was generated from the following files:

Detailed Description

Classes

Public Member Functions

JSBSim console output highlighting terms.

Member Function Documentation

◆ CelsiusToFahrenheit()

◆ CelsiusToKelvin()

◆ CelsiusToRankine()

◆ EqualToRoundoff() [1/4]

◆ EqualToRoundoff() [2/4]

◆ EqualToRoundoff() [3/4]

◆ EqualToRoundoff() [4/4]

◆ FahrenheitToCelsius()

◆ FeetToMeters()

◆ GetVersion()

◆ KelvinToCelsius()

◆ KelvinToFahrenheit()

◆ KelvinToRankine()

◆ RankineToCelsius()

◆ RankineToKelvin()

Member Data Documentation

◆ slugtolb