Stellarium 0.14.0
StelUtils.hpp
1 /*
2  * Stellarium
3  * Copyright (C) 2002 Fabien Chereau
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License
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9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13  * GNU General Public License for more details.
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15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
18  */
19 
20 #ifndef _STELUTILS_HPP_
21 #define _STELUTILS_HPP_
22 
23 #include <cmath>
24 #include "VecMath.hpp"
25 
26 #include <QVariantMap>
27 #include <QDateTime>
28 #include <QString>
29 
30 // astronomical unit (km)
31 #define AU 149597870.691
32 #define AU_KM (1.0/149597870.691)
33 // Parsec (km)
34 #define PARSEC 30.857e12
35 // speed of light (km/sec)
36 #define SPEED_OF_LIGHT 299792.458
37 
38 #define stelpow10f(x) std::exp((x) * 2.3025850930f)
39 
41 namespace StelUtils
42 {
44  QString getApplicationName();
45 
47  QString getApplicationVersion();
48 
50  QString getOperatingSystemInfo();
51 
57  double hmsToRad(const unsigned int h, const unsigned int m, const double s);
58 
64  double dmsToRad(const int d, const unsigned int m, const double s);
65 
71  void radToHms(double rad, unsigned int& h, unsigned int& m, double& s);
72 
79  void radToDms(double rad, bool& sign, unsigned int& d, unsigned int& m, double& s);
80 
85  void radToDecDeg(double rad, bool& sign, double& deg);
86 
92  QString radToDecDegStr(const double angle, const int precision = 4, const bool useD=false, const bool useC=false);
93 
97  QString radToHmsStrAdapt(const double angle);
98 
102  QString radToHmsStr(const double angle, const bool decimal=false);
103 
108  QString radToDmsStrAdapt(const double angle, const bool useD=false);
109 
114  QString radToDmsStr(const double angle, const bool decimal=false, const bool useD=false);
115 
122  void decDegToDms(double angle, bool& sign, unsigned int& d, unsigned int& m, double& s);
123 
126  QString decDegToDmsStr(const double angle);
127 
130  double dmsStrToRad(const QString& s);
131 
136  Vec3f strToVec3f(const QStringList& s);
138  Vec3f strToVec3f(const QString& s);
140  Vec4d strToVec4d(const QStringList& s);
142  Vec4d strToVec4d(const QString& s);
143 
145  QString vec3fToStr(const Vec3f& v);
147  QString vec4dToStr(const Vec4d& v);
148 
152  QString vec3fToHtmlColor(const Vec3f& v);
153 
156  Vec3f htmlColorToVec3f(const QString& c);
157 
162  void spheToRect(const double lng, const double lat, Vec3d& v);
163 
168  void spheToRect(const float lng, const float lat, Vec3f& v);
169 
174  void rectToSphe(double *lng, double *lat, const Vec3d& v);
175 
180  void rectToSphe(float *lng, float *lat, const Vec3d& v);
181 
186  void rectToSphe(float *lng, float *lat, const Vec3f& v);
187 
189  void equToEcl(const double raRad, const double decRad, const double eclRad, double *lambdaRad, double *betaRad);
190 
192  void eclToEqu(const double lambdaRad, const double betaRad, const double eclRad, double *raRad, double *decRad);
193 
214  double getDecAngle(const QString& str);
215 
217  bool isPowerOfTwo(const int value);
218 
220  int getBiggerPowerOfTwo(int value);
221 
223  double asinh(const double z);
224 
226  // New Qt based General Calendar Functions.
228  void getDateFromJulianDay(const double julianDay, int *year, int *month, int *day);
229 
231  void getTimeFromJulianDay(const double julianDay, int *hour, int *minute, int *second);
232 
235  bool getDateTimeFromISO8601String(const QString& iso8601Date, int* y, int* m, int* d, int* h, int* min, float* s);
236 
239  QString julianDayToISO8601String(const double jd);
240 
243  double getJulianDayFromISO8601String(const QString& iso8601Date, bool* ok);
244 
249  QString localeDateString(const int year, const int month, const int day, const int dayOfWeek, const QString &fmt);
250 
254  QString localeDateString(const int year, const int month, const int day, const int dayOfWeek);
255 
258  double getJDFromSystem();
259 
263  double qTimeToJDFraction(const QTime& time);
264 
266  QTime jdFractionToQTime(const double jd);
267 
269  float getGMTShiftFromQT(const double jd);
270 
274  double qDateTimeToJd(const QDateTime& dateTime);
275 
279  QDateTime jdToQDateTime(const double& jd);
280 
292  bool getJDFromDate(double* newjd, const int y, const int m, const int d, const int h, const int min, const int s);
293 
294  int numberOfDaysInMonthInYear(const int month, const int year);
295  bool changeDateTimeForRollover(int oy, int om, int od, int oh, int omin, int os,
296  int* ry, int* rm, int* rd, int* rh, int* rmin, int* rs);
297 
299  void debugQVariantMap(const QVariant& m, const QString& indent="", const QString& key="");
300 
301 
304  inline float fastAcos(const float x)
305  {
306  return static_cast<float>(M_PI_2) - (x + x*x*x * (1.f/6.f + x*x * (3.f/40.f + 5.f/112.f * x*x)) );
307  }
308 
310  inline float fastExp(const float x)
311  {
312  return (x>=0)?
313  (1.f + x*(1.f+ x/2.f*(1.f+ x/3.f*(1.f+x/4.f*(1.f+x/5.f))))):
314  1.f / (1.f -x*(1.f -x/2.f*(1.f- x/3.f*(1.f-x/4.f*(1.f-x/5.f)))));
315  }
316 
319  inline Vec3f getNightColor(const Vec3f& dayColor)
320  {
321  float max = 0.0;
322  for(int i=0; i<3; i++)
323  {
324  max = dayColor[i] > max ? dayColor[i] : max;
325  }
326  return Vec3f(max, 0, 0);
327  }
328 
330  double calculateSiderealPeriod(const double SemiMajorAxis);
331 
333  QString hoursToHmsStr(const double hours);
334 
342  long double secondsSinceStart();
343 
347  // GZ: I don't see this returning 0. There is always a rough estimate beyond that.
351  double getDeltaTByEspenakMeeus(const double jDay);
352 
361  double getDeltaTBySchoch(const double jDay);
362 
372  double getDeltaTByClemence(const double jDay);
373 
382  double getDeltaTByIAU(const double jDay);
383 
393  double getDeltaTByAstronomicalEphemeris(const double jDay);
394 
399  double getDeltaTByTuckermanGoldstine(const double jDay);
400 
412  double getDeltaTByMullerStephenson(const double jDay);
413 
423  double getDeltaTByStephenson1978(const double jDay);
424 
431  double getDeltaTByStephenson1997(const double jDay);
432 
442  double getDeltaTBySchmadelZech1979(const double jDay);
443 
448  double getDeltaTByMorrisonStephenson1982(const double jDay);
449 
458  double getDeltaTByStephensonMorrison1984(const double jDay);
459 
468  double getDeltaTByStephensonMorrison1995(const double jDay);
469 
474  double getDeltaTByStephensonHoulden(const double jDay);
475 
481  double getDeltaTByEspenak(const double jDay);
482 
491  double getDeltaTByBorkowski(const double jDay);
492 
501  double getDeltaTBySchmadelZech1988(const double jDay);
502 
507  double getDeltaTByChaprontTouze(const double jDay);
508 
513  double getDeltaTByJPLHorizons(const double jDay);
514 
527  double getDeltaTByMorrisonStephenson2004(const double jDay);
528 
534  double getDeltaTByReijs(const double jDay);
535 
540  double getDeltaTByChaprontMeeus(const double jDay);
541 
550  double getDeltaTByMeeusSimons(const double jDay);
551 
558  double getDeltaTByMontenbruckPfleger(const double jDay);
559 
566  double getDeltaTByReingoldDershowitz(const double jDay);
567 
576  double getDeltaTByBanjevic(const double jDay);
577 
590  double getDeltaTByIslamSadiqQureshi(const double jDay);
591 
599  double getDeltaTByKhalidSultanaZaidi(const double jDay);
600 
609  double getMoonSecularAcceleration(const double jDay, const double ndot);
610 
614  double getDeltaTStandardError(const double jDay);
615 
617  template <typename T> int sign(T val)
618  {
619  return (T(0) < val) - (val < T(0));
620  }
621 
626  float *ComputeCosSinTheta(const int slices);
627 
632  float *ComputeCosSinRho(const int segments);
633 
641  float* ComputeCosSinRhoZone(const float dRho, const int segments, const float minAngle);
642 
648  double getDecYear(const int year, const int month, const int day);
649 
651  QByteArray uncompress(const QByteArray& data);
652 
658  QByteArray uncompress(QIODevice &device, qint64 maxBytes=-1);
659 
660 #ifdef _MSC_BUILD
661  inline double trunc(double x)
662  {
663  return (x < 0 ? std::ceil(x) : std::floor(x));
664  }
665 #else
666  inline double trunc(double x) { return ::trunc(x); }
667 #endif
668 }
669 
670 #endif // _STELUTILS_HPP_
double getDeltaTByMontenbruckPfleger(const double jDay)
Get Delta-T estimation for a given date.
QString decDegToDmsStr(const double angle)
Convert an angle in decimal degrees to a dms formatted string.
bool getDateTimeFromISO8601String(const QString &iso8601Date, int *y, int *m, int *d, int *h, int *min, float *s)
Parse an ISO8601 date string.
bool isPowerOfTwo(const int value)
Check if a number is a power of 2.
QTime jdFractionToQTime(const double jd)
Convert a fraction of a Julian Day to a QTime.
QString hoursToHmsStr(const double hours)
Convert decimal hours to hours, minutes, seconds.
double getDeltaTByMorrisonStephenson2004(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByIslamSadiqQureshi(const double jDay)
Get Delta-T estimation for a given date.
QString vec4dToStr(const Vec4d &v)
Converts a Vec4d to a string in the same format that can be read by strToVec4d.
void equToEcl(const double raRad, const double decRad, const double eclRad, double *lambdaRad, double *betaRad)
Coordinate Transformation from equatorial to ecliptical.
double getJDFromSystem()
Get the current Julian Date from system time.
double getDeltaTByJPLHorizons(const double jDay)
Get Delta-T estimation for a given date.
void rectToSphe(double *lng, double *lat, const Vec3d &v)
Convert from spherical coordinates to Rectangular direction.
double getDeltaTByReijs(const double jDay)
Get Delta-T estimation for a given date.
Vec3f strToVec3f(const QStringList &s)
Obtains a Vec3f from a string.
QString getApplicationName()
Return the full name of stellarium, i.e. "stellarium 0.9.0".
double dmsStrToRad(const QString &s)
Convert a dms formatted string to an angle in radian.
void spheToRect(const double lng, const double lat, Vec3d &v)
Convert from spherical coordinates to Rectangular direction.
void getTimeFromJulianDay(const double julianDay, int *hour, int *minute, int *second)
Make from julianDay an hour, minute, second.
double hmsToRad(const unsigned int h, const unsigned int m, const double s)
Convert an angle in hms format to radian.
double getDeltaTByEspenak(const double jDay)
Get Delta-T estimation for a given date.
QString getOperatingSystemInfo()
Return the name and the version of operating system, i.e. "Mac OS X 10.7".
float * ComputeCosSinRho(const int segments)
Compute cosines and sines around a half-circle which is split in "segments" parts.
float * ComputeCosSinTheta(const int slices)
Compute cosines and sines around a circle which is split in "segments" parts.
QString radToHmsStrAdapt(const double angle)
Convert an angle in radian to a hms formatted string.
QString vec3fToHtmlColor(const Vec3f &v)
Converts a Vec3f to HTML color notation.
double getDeltaTByBanjevic(const double jDay)
Get Delta-T estimation for a given date.
double getDecYear(const int year, const int month, const int day)
Compute date in decimal year format.
double getDeltaTByChaprontTouze(const double jDay)
Get Delta-T estimation for a given date.
QString localeDateString(const int year, const int month, const int day, const int dayOfWeek, const QString &fmt)
Format the date and day-of-week per the format in fmt (see QDateTime::toString()).
QDateTime jdToQDateTime(const double &jd)
Convert a julian day to a QDateTime.
Vec3f getNightColor(const Vec3f &dayColor)
Get a night mode version of a color.
Definition: StelUtils.hpp:319
void radToDecDeg(double rad, bool &sign, double &deg)
Convert an angle in radian to decimal degree.
double qDateTimeToJd(const QDateTime &dateTime)
Convert a QT QDateTime class to julian day.
void radToHms(double rad, unsigned int &h, unsigned int &m, double &s)
Convert an angle in radian to hms format.
double getDeltaTByMorrisonStephenson1982(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByTuckermanGoldstine(const double jDay)
Get Delta-T estimation for a given date.
void decDegToDms(double angle, bool &sign, unsigned int &d, unsigned int &m, double &s)
Convert an angle in decimal degree to +-dms format.
Vec4d strToVec4d(const QStringList &s)
Like StelUtils::strToVec3f, but with 4 components and with double precision.
double getDeltaTByBorkowski(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTBySchmadelZech1988(const double jDay)
Get Delta-T estimation for a given date.
QString radToDecDegStr(const double angle, const int precision=4, const bool useD=false, const bool useC=false)
Convert an angle in radian to a decimal degree string.
QString getApplicationVersion()
Return the version of stellarium, i.e. "0.9.0".
QString julianDayToISO8601String(const double jd)
Format the given Julian Day in (UTC) ISO8601 date string.
double getDeltaTByChaprontMeeus(const double jDay)
Get Delta-T estimation for a given date.
float fastAcos(const float x)
Compute acos(x) The taylor serie is not accurate around x=1 and x=-1.
Definition: StelUtils.hpp:304
double getDeltaTBySchoch(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByStephensonMorrison1984(const double jDay)
Get Delta-T estimation for a given date.
QString radToDmsStr(const double angle, const bool decimal=false, const bool useD=false)
Convert an angle in radian to a dms formatted string.
double getDeltaTBySchmadelZech1979(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByKhalidSultanaZaidi(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByIAU(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByEspenakMeeus(const double jDay)
Get Delta-T estimation for a given date.
void radToDms(double rad, bool &sign, unsigned int &d, unsigned int &m, double &s)
Convert an angle in radian to +-dms format.
A templatized 4d vector compatible with openGL.
Definition: VecMath.hpp:34
double dmsToRad(const int d, const unsigned int m, const double s)
Convert an angle in +-dms format to radian.
double calculateSiderealPeriod(const double SemiMajorAxis)
Calculate and getting sidereal period in days from semi-major axis (in AU)
double getMoonSecularAcceleration(const double jDay, const double ndot)
Get Secular Acceleration estimation for a given year.
double getDeltaTByStephenson1997(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByStephenson1978(const double jDay)
Get Delta-T estimation for a given date.
QString radToDmsStrAdapt(const double angle, const bool useD=false)
Convert an angle in radian to a dms formatted string.
double getDeltaTByAstronomicalEphemeris(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByClemence(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByMeeusSimons(const double jDay)
Get Delta-T estimation for a given date.
double getDecAngle(const QString &str)
Convert a string longitude, latitude, RA or Declination angle to radians.
int getBiggerPowerOfTwo(int value)
Return the first power of two bigger than the given value.
QString vec3fToStr(const Vec3f &v)
Converts a Vec3f to a string in the same format that can be read by strToVec3f.
void eclToEqu(const double lambdaRad, const double betaRad, const double eclRad, double *raRad, double *decRad)
Coordinate Transformation from ecliptical to equatorial.
long double secondsSinceStart()
Get the number of seconds since program start.
double getDeltaTByMullerStephenson(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByStephensonMorrison1995(const double jDay)
Get Delta-T estimation for a given date.
float * ComputeCosSinRhoZone(const float dRho, const int segments, const float minAngle)
Compute cosines and sines around part of a circle (from top to bottom) which is split in "segments" p...
QString radToHmsStr(const double angle, const bool decimal=false)
Convert an angle in radian to a hms formatted string.
double getJulianDayFromISO8601String(const QString &iso8601Date, bool *ok)
Return the Julian Date matching the ISO8601 date string.
QByteArray uncompress(const QByteArray &data)
Uncompress gzip or zlib compressed data.
int sign(T val)
Sign function from http://stackoverflow.com/questions/1903954/is-there-a-standard-sign-function-signu...
Definition: StelUtils.hpp:617
double qTimeToJDFraction(const QTime &time)
Convert a time of day to the fraction of a Julian Day.
bool getJDFromDate(double *newjd, const int y, const int m, const int d, const int h, const int min, const int s)
Compute Julian day number from calendar date.
void getDateFromJulianDay(const double julianDay, int *year, int *month, int *day)
Make from julianDay a year, month, day for the Julian Date julianDay represents.
double getDeltaTStandardError(const double jDay)
Get the standard error (sigma) for the value of DeltaT.
double getDeltaTByReingoldDershowitz(const double jDay)
Get Delta-T estimation for a given date.
double getDeltaTByStephensonHoulden(const double jDay)
Get Delta-T estimation for a given date.
float fastExp(const float x)
Compute exp(x) for small exponents x.
Definition: StelUtils.hpp:310
Vec3f htmlColorToVec3f(const QString &c)
Converts a color in HTML notation to a Vec3f.
double asinh(const double z)
Return the inverse sinus hyperbolic of z.
float getGMTShiftFromQT(const double jd)
Return number of hours offset from GMT, using Qt functions.
void debugQVariantMap(const QVariant &m, const QString &indent="", const QString &key="")
Output a QVariantMap to qDebug(). Formats like a tree where there are nested objects.