Stellarium 0.13.1
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.
14  *
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 "config.h"
24 
25 #include "VecMath.hpp"
26 
27 #include <QVariantMap>
28 #include <QDateTime>
29 #include <QString>
30 
31 // astronomical unit (km)
32 #define AU 149597870.691
33 #define AU_KM (1.0/149597870.691)
34 // Parsec (km)
35 #define PARSEC 30.857e12
36 // speed of light (km/sec)
37 #define SPEED_OF_LIGHT 299792.458
38 
40 namespace StelUtils
41 {
43  QString getApplicationName();
44 
46  QString getApplicationVersion();
47 
49  QString getOperatingSystemInfo();
50 
56  double hmsToRad(const unsigned int h, const unsigned int m, const double s);
57 
63  double dmsToRad(const int d, const unsigned int m, const double s);
64 
70  void radToHms(double rad, unsigned int& h, unsigned int& m, double& s);
71 
78  void radToDms(double rad, bool& sign, unsigned int& d, unsigned int& m, double& s);
79 
83  QString radToHmsStrAdapt(const double angle);
84 
88  QString radToHmsStr(const double angle, const bool decimal=false);
89 
94  QString radToDmsStrAdapt(const double angle, const bool useD=false);
95 
100  QString radToDmsStr(const double angle, const bool decimal=false, const bool useD=false);
101 
108  void decDegToDms(double angle, bool& sign, unsigned int& d, unsigned int& m, double& s);
109 
112  QString decDegToDmsStr(const double angle);
113 
116  double dmsStrToRad(const QString& s);
117 
122  Vec3f strToVec3f(const QStringList& s);
123  Vec3f strToVec3f(const QString& s);
124 
128  QString vec3fToHtmlColor(const Vec3f& v);
129 
132  Vec3f htmlColorToVec3f(const QString& c);
133 
138  void spheToRect(const double lng, const double lat, Vec3d& v);
139 
144  void spheToRect(const float lng, const float lat, Vec3f& v);
145 
150  void rectToSphe(double *lng, double *lat, const Vec3d& v);
151 
156  void rectToSphe(float *lng, float *lat, const Vec3d& v);
157 
162  void rectToSphe(float *lng, float *lat, const Vec3f& v);
163 
164  // GZ: some additions. I need those just for quick conversions for text display.
166  void ctRadec2Ecl(const double raRad, const double decRad, const double eclRad, double *lambdaRad, double *betaRad);
167  // GZ: done
168 
189  double getDecAngle(const QString& str);
190 
192  bool isPowerOfTwo(const int value);
193 
195  int getBiggerPowerOfTwo(int value);
196 
198  double asinh(const double z);
199 
201  // New Qt based General Calendar Functions.
203  void getDateFromJulianDay(const double julianDay, int *year, int *month, int *day);
204 
206  void getTimeFromJulianDay(const double julianDay, int *hour, int *minute, int *second);
207 
210  bool getDateTimeFromISO8601String(const QString& iso8601Date, int* y, int* m, int* d, int* h, int* min, float* s);
211 
214  QString julianDayToISO8601String(const double jd);
215 
218  double getJulianDayFromISO8601String(const QString& iso8601Date, bool* ok);
219 
224  QString localeDateString(const int year, const int month, const int day, const int dayOfWeek, const QString fmt);
225 
229  QString localeDateString(const int year, const int month, const int day, const int dayOfWeek);
230 
233  double getJDFromSystem();
234 
238  double qTimeToJDFraction(const QTime& time);
239 
241  QTime jdFractionToQTime(const double jd);
242 
244  float getGMTShiftFromQT(const double jd);
245 
249  double qDateTimeToJd(const QDateTime& dateTime);
250 
254  QDateTime jdToQDateTime(const double& jd);
255 
267  bool getJDFromDate(double* newjd, const int y, const int m, const int d, const int h, const int min, const int s);
268 
269  int numberOfDaysInMonthInYear(const int month, const int year);
270  bool changeDateTimeForRollover(int oy, int om, int od, int oh, int omin, int os,
271  int* ry, int* rm, int* rd, int* rh, int* rmin, int* rs);
272 
274  void debugQVariantMap(const QVariant& m, const QString& indent="", const QString& key="");
275 
276 
279  inline float fastAcos(const float x)
280  {
281  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)) );
282  }
283 
285  inline float fastExp(const float x)
286  {
287  return (x>=0)?
288  (1.f + x*(1.f+ x/2.f*(1.f+ x/3.f*(1.f+x/4.f*(1.f+x/5.f))))):
289  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)))));
290  }
291 
294  inline Vec3f getNightColor(const Vec3f& dayColor)
295  {
296  float max = 0.0;
297  for(int i=0; i<3; i++)
298  {
299  max = dayColor[i] > max ? dayColor[i] : max;
300  }
301  return Vec3f(max, 0, 0);
302  }
303 
305  double calculateSiderealPeriod(const double SemiMajorAxis);
306 
307  QString hoursToHmsStr(const double hours);
308 
316  long double secondsSinceStart();
317 
321  // GZ: I don't see this returning 0. There is always a rough estimate beyond that.
325  double getDeltaTByEspenakMeeus(const double jDay);
326 
335  double getDeltaTBySchoch(const double jDay);
336 
346  double getDeltaTByClemence(const double jDay);
347 
356  double getDeltaTByIAU(const double jDay);
357 
367  double getDeltaTByAstronomicalEphemeris(const double jDay);
368 
373  double getDeltaTByTuckermanGoldstine(const double jDay);
374 
386  double getDeltaTByMullerStephenson(const double jDay);
387 
397  double getDeltaTByStephenson1978(const double jDay);
398 
405  double getDeltaTByStephenson1997(const double jDay);
406 
416  double getDeltaTBySchmadelZech1979(const double jDay);
417 
422  double getDeltaTByMorrisonStephenson1982(const double jDay);
423 
432  double getDeltaTByStephensonMorrison1984(const double jDay);
433 
442  double getDeltaTByStephensonMorrison1995(const double jDay);
443 
448  double getDeltaTByStephensonHoulden(const double jDay);
449 
455  double getDeltaTByEspenak(const double jDay);
456 
465  double getDeltaTByBorkowski(const double jDay);
466 
475  double getDeltaTBySchmadelZech1988(const double jDay);
476 
481  double getDeltaTByChaprontTouze(const double jDay);
482 
487  double getDeltaTByJPLHorizons(const double jDay);
488 
501  double getDeltaTByMorrisonStephenson2004(const double jDay);
502 
508  double getDeltaTByReijs(const double jDay);
509 
514  double getDeltaTByChaprontMeeus(const double jDay);
515 
524  double getDeltaTByMeeusSimons(const double jDay);
525 
532  double getDeltaTByMontenbruckPfleger(const double jDay);
533 
540  double getDeltaTByReingoldDershowitz(const double jDay);
541 
550  double getDeltaTByBanjevic(const double jDay);
551 
564  double getDeltaTByIslamSadiqQureshi(const double jDay);
565 
574  double getMoonSecularAcceleration(const double jDay, const double ndot);
575 
579  double getDeltaTStandardError(const double jDay);
580 
582  template <typename T> int sign(T val) {
583  return (T(0) < val) - (val < T(0));
584  }
585 
590  float *ComputeCosSinTheta(const int slices);
591 
596  float *ComputeCosSinRho(const int segments);
597 
605  float* ComputeCosSinRhoZone(const float dRho, const int segments, const float minAngle);
606 
608  QByteArray uncompress(const QByteArray& data);
609 }
610 
611 #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.
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.
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 getDeltaTByChaprontTouze(const double jDay)
Get Delta-T estimation for a given date.
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:294
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.
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 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:279
void ctRadec2Ecl(const double raRad, const double decRad, const double eclRad, double *lambdaRad, double *betaRad)
Coordinate Transformation from equatorial to ecliptical.
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 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.
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)
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()).
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.
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.
A templatized 3d vector compatible with openGL.
Definition: VecMath.hpp:33
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:582
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:285
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.