swisseph

Class SwissLib

java.lang.Object

swisseph.SwissLib

All Implemented Interfaces:

java.io.Serializable

public class SwissLib
extends java.lang.Object
implements java.io.Serializable

This class offers many routines that might be interesting to a programmer.

One important note: in all this package, negative longitudes are considered to be west of Greenwich, positive longitudes are seen as east of Greenwich. Especially America often uses a different notation!

Probably most interesting are the functions swe_sidtime() (calculate the sidereal time) and swe_degnorm() (normalize a position to the range of 0.0 <= x < 360.0) and others.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	DPSI_DEPS_IAU1980_FILE_EOPC04
static java.lang.String	DPSI_DEPS_IAU1980_FILE_FINALS
static double	DPSI_DEPS_IAU1980_TJD0_HORIZONS
static double	HORIZONS_TJD0_DPSI_DEPS_IAU1980

Constructor Summary

Constructors

Constructor and Description
SwissLib()
SwissLib(SwissData swed)

Method Summary

Modifier and Type	Method and Description
static double	atof(java.lang.String src) This method emulates the C version of atof() allowing any string to be parsed into a number.
static int	atoi(java.lang.String src) This method emulates the C version of atoi() allowing any string to be parsed into an integer.
double	square_sum(double[] x)
double	square_sum(double[] x, int offset)
void	swe_cotrans_sp(double[] xpo, double[] xpn, double eps)
void	swe_cotrans(double[] xpo, double[] xpn, double eps)
void	swe_cotrans(double[] xpo, int oOffs, double[] xpn, int nOffs, double eps)
int	swe_d2l(double x) Round double to integer; negative double will get rounded as: - Math.abs(x)
double	swe_deg_midp(double x1, double x0)
double	swe_degnorm(double x) Normalizes a double to the range of 0.0 >= x < 360.0.
double	swe_difdeg2n(double p1, double p2) This calculates the difference of the two angles p1, p2 and normalizes them to a range of -180.0 <= x < 180.0 degrees.
double	swe_difrad2n(double p1, double p2)
double	swe_rad_midp(double x1, double x0)
double	swe_radnorm(double x) Normalizes a double to the range 0.0 >= x < 2*PI.
void	swe_set_astro_models(int[] imodel)
double	swe_sidtime(double tjd_ut) This calculates the sidereal time from a Julian day number.
double	swe_sidtime0(double tjd, double eps, double nut) This calculates the sidereal time from a Julian day number, the obliquity of the eclipse and the nutation (in degrees).
void	swe_split_deg(double ddeg, int roundflag, IntObj ideg, IntObj imin, IntObj isec, DblObj dsecfr, IntObj isgn) Method to split centiseconds into: ideg degrees, imin minutes, isec seconds, dsecfr fraction of seconds isgn zodiac sign number;
double	swi_angnorm(double x)
void	swi_cartpol_sp(double[] x, double[] l)
void	swi_cartpol_sp(double[] x, int xOffs, double[] l, int lOffs)
void	swi_cartpol(double[] x, double[] l)
void	swi_cartpol(double[] x, int xOffs, double[] l, int lOffs)
void	swi_coortrf(double[] xpo, double[] xpn, double eps)
void	swi_coortrf(double[] xpo, int oOffs, double[] xpn, int nOffs, double eps)
void	swi_coortrf2(double[] xpo, double[] xpn, double sineps, double coseps)
void	swi_coortrf2(double[] xpo, int oOffs, double[] xpn, int nOffs, double sineps, double coseps)
void	swi_cross_prod(double[] a, int aOffs, double[] b, int bOffs, double[] x, int xOffs)
int	swi_cutstr(java.lang.String s, java.lang.String cutlist, java.lang.String[] cpos, int nmax) Cut the String s at any character in cutlist and put the resulting Strings into String cpos[].
double	swi_dot_prod_unit(double[] x, double[] y)
double	swi_echeb(double x, double[] coef, int offs, int ncf)
double	swi_edcheb(double x, double[] coef, int offs, int ncf)
void	swi_FK4_FK5(double[] xp, double tjd)
void	swi_FK5_FK4(double[] xp, double tjd)
static java.lang.String	swi_gen_filename(double jd, int ipli)
static java.lang.String	swi_gen_filename(SweDate sd, int ipli)
double	swi_kepler(double E, double M, double ecce)
double	swi_mod2PI(double x)
void	swi_polcart_sp(double[] l, double[] x)
void	swi_polcart_sp(double[] l, int lOffs, double[] x, int xOffs)
void	swi_polcart(double[] l, double[] x)
void	swi_polcart(double[] l, int lOffs, double[] x, int xOffs)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DPSI_DEPS_IAU1980_FILE_EOPC04

public static final java.lang.String DPSI_DEPS_IAU1980_FILE_EOPC04

See Also:

Constant Field Values

DPSI_DEPS_IAU1980_FILE_FINALS

public static final java.lang.String DPSI_DEPS_IAU1980_FILE_FINALS

See Also:

Constant Field Values

DPSI_DEPS_IAU1980_TJD0_HORIZONS

public static final double DPSI_DEPS_IAU1980_TJD0_HORIZONS

See Also:

Constant Field Values

HORIZONS_TJD0_DPSI_DEPS_IAU1980

public static final double HORIZONS_TJD0_DPSI_DEPS_IAU1980

See Also:

Constant Field Values

Constructor Detail

SwissLib

public SwissLib()

SwissLib

public SwissLib(SwissData swed)

Method Detail

square_sum

public double square_sum(double[] x)

square_sum

public double square_sum(double[] x,
                         int offset)

swe_degnorm

public double swe_degnorm(double x)

Normalizes a double to the range of 0.0 >= x < 360.0.

Parameters:

x - input double

Returns:

normalized value to a range of 0 .. < 360

swe_radnorm

public double swe_radnorm(double x)

Normalizes a double to the range 0.0 >= x < 2*PI.

Parameters:

x - input double

Returns:

normalized value to a range of 0 .. < 2*PI

swe_deg_midp

public double swe_deg_midp(double x1,
                           double x0)

swe_rad_midp

public double swe_rad_midp(double x1,
                           double x0)

swi_mod2PI

public double swi_mod2PI(double x)

swi_angnorm

public double swi_angnorm(double x)

swi_cross_prod

public void swi_cross_prod(double[] a,
                           int aOffs,
                           double[] b,
                           int bOffs,
                           double[] x,
                           int xOffs)

swi_echeb

public double swi_echeb(double x,
                        double[] coef,
                        int offs,
                        int ncf)

swi_edcheb

public double swi_edcheb(double x,
                         double[] coef,
                         int offs,
                         int ncf)

swe_cotrans

public void swe_cotrans(double[] xpo,
                        double[] xpn,
                        double eps)

swe_cotrans

public void swe_cotrans(double[] xpo,
                        int oOffs,
                        double[] xpn,
                        int nOffs,
                        double eps)

swe_cotrans_sp

public void swe_cotrans_sp(double[] xpo,
                           double[] xpn,
                           double eps)

swi_coortrf

public void swi_coortrf(double[] xpo,
                        double[] xpn,
                        double eps)

swi_coortrf

public void swi_coortrf(double[] xpo,
                        int oOffs,
                        double[] xpn,
                        int nOffs,
                        double eps)

swi_coortrf2

public void swi_coortrf2(double[] xpo,
                         double[] xpn,
                         double sineps,
                         double coseps)

swi_coortrf2

public void swi_coortrf2(double[] xpo,
                         int oOffs,
                         double[] xpn,
                         int nOffs,
                         double sineps,
                         double coseps)

swi_cartpol

public void swi_cartpol(double[] x,
                        double[] l)

swi_cartpol

public void swi_cartpol(double[] x,
                        int xOffs,
                        double[] l,
                        int lOffs)

swi_polcart

public void swi_polcart(double[] l,
                        double[] x)

swi_polcart

public void swi_polcart(double[] l,
                        int lOffs,
                        double[] x,
                        int xOffs)

swi_cartpol_sp

public void swi_cartpol_sp(double[] x,
                           double[] l)

swi_cartpol_sp

public void swi_cartpol_sp(double[] x,
                           int xOffs,
                           double[] l,
                           int lOffs)

swi_polcart_sp

public void swi_polcart_sp(double[] l,
                           double[] x)

swi_polcart_sp

public void swi_polcart_sp(double[] l,
                           int lOffs,
                           double[] x,
                           int xOffs)

swi_dot_prod_unit

public double swi_dot_prod_unit(double[] x,
                                double[] y)

swi_cutstr

public int swi_cutstr(java.lang.String s,
                      java.lang.String cutlist,
                      java.lang.String[] cpos,
                      int nmax)

Cut the String s at any character in cutlist and put the resulting Strings into String cpos[].

Parameters:

s - The input string.

cutlist - A String specifying all characters, where the input string should be cut.

cpos - Input and output paramater: a String[] containing maximum 'nmax' Strings.

nmax - The size of the cpos array. A relict from the C version...

Returns:

Number of generated Strings

swe_sidtime0

public double swe_sidtime0(double tjd,
                           double eps,
                           double nut)

This calculates the sidereal time from a Julian day number, the obliquity of the eclipse and the nutation (in degrees). You might want to use swe_sidtime(double), if you have just the Julian day number available.

Parameters:

tjd - The Julian day number

eps - Obliquity of the ecliptic

nut - Nutation in degrees

Returns:

Sidereal time in degrees.

See Also:

swe_sidtime(double)

swe_sidtime

public double swe_sidtime(double tjd_ut)

This calculates the sidereal time from a Julian day number.

Parameters:

tjd_ut - The Julian day number (in UT)

Returns:

Sidereal time in degrees.

See Also:

swe_sidtime0(double, double, double)

swi_gen_filename

public static java.lang.String swi_gen_filename(SweDate sd,
                                                int ipli)

swi_gen_filename

public static java.lang.String swi_gen_filename(double jd,
                                                int ipli)

swe_split_deg

public void swe_split_deg(double ddeg,
                          int roundflag,
                          IntObj ideg,
                          IntObj imin,
                          IntObj isec,
                          DblObj dsecfr,
                          IntObj isgn)

Method to split centiseconds into:

  ideg        degrees,
  imin        minutes,
  isec        seconds,
  dsecfr      fraction of seconds
  isgn        zodiac sign number;
 

Parameters:

ddeg - Input value in centiseconds

roundflag - Flag for rounding, one of [SweConst.SE_SPLIT_DEG_ROUND_DEG | SweConst.SE_SPLIT_DEG_ROUND_MIN | SweConst.SE_SPLIT_DEG_ROUND_SEC] in combination with [SweConst.SE_SPLIT_DEG_KEEP_DEG | SweConst.SE_SPLIT_DEG_KEEP_SIGN | SweConst.SE_SPLIT_DEG_ZODIACAL]

ideg - Output value, degree

imin - Output value, minutes

isec - Output value, seconds

dsecfr - Output value, fraction of seconds

isgn - Output value, sign of value

See Also:

SweConst.SE_SPLIT_DEG_ROUND_DEG, SweConst.SE_SPLIT_DEG_ROUND_MIN, SweConst.SE_SPLIT_DEG_ROUND_SEC, SweConst.SE_SPLIT_DEG_KEEP_DEG, SweConst.SE_SPLIT_DEG_ZODIACAL

swi_kepler

public double swi_kepler(double E,
                         double M,
                         double ecce)

swe_set_astro_models

public void swe_set_astro_models(int[] imodel)

swi_FK4_FK5

public void swi_FK4_FK5(double[] xp,
                        double tjd)

swi_FK5_FK4

public void swi_FK5_FK4(double[] xp,
                        double tjd)

swe_d2l

public int swe_d2l(double x)

Round double to integer; negative double will get rounded as: - Math.abs(x)

Parameters:

x - The double value to round to an integer

Returns:

Integer value

swe_difdeg2n

public double swe_difdeg2n(double p1,
                           double p2)

This calculates the difference of the two angles p1, p2 and normalizes them to a range of -180.0 <= x < 180.0 degrees.

Parameters:

p1 - The angle of point 1

p2 - The angle of point 2

Returns:

The normalized difference between p1, p2

swe_difrad2n

public double swe_difrad2n(double p1,
                           double p2)

atof

public static double atof(java.lang.String src)

This method emulates the C version of atof() allowing any string to be parsed into a number.

Parameters:

src - String to parse to a double

Returns:

Double value

atoi

public static int atoi(java.lang.String src)

This method emulates the C version of atoi() allowing any string to be parsed into an integer.

Parameters:

src - String to parse to an integer

Returns:

Integer value