SO3Astronomy.h

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/*
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This source file is part of OpenSpace3D
For the latest info, see http://www.openspace3d.com
 
Copyright (c) 2012 I-maginer
 
This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.
 
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 
You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt
 
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*/
 
/*
Taken from Caelum (http://www.ogre3d.org/wiki/index.php/Caelum)
Planetary position computation from http://stjarnhimlen.se/comp/ppcomp.html#5
Sunrise/sunset & moonrise/moonset computation from http://stjarnhimlen.se/comp/riset.html
There's also usefull informations in "A physically-based night sky model" concerning the moon position calculation.
*/
 
#ifndef __SO3_ASTRONOMY_H__
#define __SO3_ASTRONOMY_H__
 
#include "SCOLBasic/SO3Prerequisites.h"
 
namespace SO3
{
 
class _SO3_Export SAstronomy
{
public:
  static const double J2000; 
protected:
private:
  static const double PI;
 
public:
  static double NormalizeDegrees(const double& x);
  
  static double RadToDeg(const double& x);
  
  static double DegToRad(const double& x);
  
  static double SinDeg(const double& x);
  
  static double CosDeg(const double& x);
  
  static double Atan2Deg(const double& y, const double& x);
  
  static void ConvertEclipticToEquatorialRad(const double& lon, const double& lat, double& rasc, double& decl);
 
  static void ConvertRectangularToSpherical(const double& x, const double& y, const double& z, double& rasc, double& decl, double& dist);
 
  static void ConvertSphericalToRectangular(const double& rasc, const double& decl, const double& dist, double& x, double& y, double& z);
 
  static void ConvertEquatorialToHorizontal(const double& jday, const double& longitude, const double& latitude, const double& rasc, const double& decl, double& azimuth, double& altitude);
 
  static void GetEclipticSunPosition(const double& jday, double& lambda, double& beta);
 
  static void GetEquatorialSunPosition(const double& jday, double& sunRightAscension, double& sunDeclinaison);
 
  static void GetHorizontalSunPosition(const double& jday, const double& longitude, const double& latitude, double& azimuth, double& altitude);
 
  static void GetHorizontalSunPosition(const double& jday, const Ogre::Degree& longitude, const Ogre::Degree& latitude, Ogre::Degree& azimuth, Ogre::Degree& altitude);
 
  static void GetEclipticMoonPositionRad(const double& jday, double& lon, double& lat);
 
  static void GetHorizontalMoonPosition(const double& jday, const double& longitude, const double& latitude, double& azimuth, double& altitude);
 
  static void GetHorizontalMoonPosition(const double& jday, const Ogre::Degree& longitude, const Ogre::Degree& latitude, Ogre::Degree& azimuth, Ogre::Degree& altitude);
 
  static void GetMoonPhase(const double& jday, float& moonPhase);
 
  static int GetJulianDayFromGregorianDate(const int& year, const int& month, const int& day); 
 
  static double GetJulianDayFromGregorianDateTime(const int& year, const int& month, const int& day, const int& hour, const int& minute, const double& second); 
 
  static double GetJulianDayFromGregorianDateTime(const int& year, const int& month, const int& day, const double& secondsFromMidnight); 
 
  static void GetGregorianDateFromJulianDay(const int& julianDay, int& year, int& month, int& day);
 
  static void GetGregorianDateTimeFromJulianDay(const double& julianDay, int& year, int& month, int& day, int& hour, int& minute, double& second);
 
  static void GetGregorianDateFromJulianDay(const double& julianDay, int& year, int& month, int& day);
 
  static int EnterHighPrecissionFloatingPointMode();
 
  /*
  Restore old floating point precission.
  @see EnterHighPrecissionFloatingPointMode.
  */
  static void RestoreFloatingPointMode(const int& oldMode);
 
  static void GetEclipticSunMeanLongitude(const double& jday, double& sunlon);
protected:
private:
  SAstronomy();
};
 
class ScopedHighPrecissionFloatSwitch
{
public:
protected:
private:
  int mOldFpMode;
 
public:
  inline ScopedHighPrecissionFloatSwitch()
  {
    mOldFpMode = SAstronomy::EnterHighPrecissionFloatingPointMode();
  }
 
  inline ~ScopedHighPrecissionFloatSwitch()
  {
    SAstronomy::RestoreFloatingPointMode(mOldFpMode);
  }
protected:
private:
};
 
}
 
#endif