1 // Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #ifndef __ASTRONOMICALCAL_H__

    17 #define __ASTRONOMICALCAL_H__

    18 

    19 

    20 #include <e32std.h>

    21 #include <e32base.h>

    22 #include "calconvcalendar.h"

    23 

    24 const TInt KCalConvFirstDay = 1;

    25 const TReal KMeanSynodicMonth = 29.530588853;

    26 

    27 

    28 class TAstronomicalCalendar : public TCalendar  

    29 	{

    30 public:

    31 	TAstronomicalCalendar();

    32 

    33 protected:

    34 	void  AdjustJDFromNoon(TReal& aJulianDay) const;

    35 	void  AdjustJDToNoon(TReal& aJulianDay) const;

    36 	TReal NewMoonAtOrAfter(const TReal& aJulianDay) const;

    37 	void  EphemerisCorrection(const TReal aJulianDay, TReal& emphCorr) const;

    38 	TReal LocalFromUniversal(const TReal& aTime, const TReal& aZone) const;

    39 	TReal UniversalFromLocal(const TReal& aTime, const TReal& aZone) const;

    40 	TReal DateNextSolarLongitude(const TReal& aJulianDay, const TReal& aDegrees) const;

    41 	void  SolarLongitude(const TReal& aJulianDay, TReal& aTheta) const;

    42 	void  JulianCenturies(const TReal& aJulianDay, TReal& aJC) const;

    43 	void  EphemerisFromUniversal(const TReal& aJulianDay, TReal& aCorrectedJD) const;

    44 	TReal UniversalFromEphemeris(const TReal& aJulianDay) const;

    45 	void  EphemerisCorrPopX(const TInt aYear, TReal& aEmphCorr) const;

    46 	TReal NewMoonBefore(const TReal& aJulianDay) const;

    47 private:

    48 	TReal NewMoonTime(TInt aTime) const;

    49 	void  GetLongitude(const TReal& aC, TReal& aLongitude) const;

    50 	void  Aberration(const TReal& aJulianCenturies, TReal& aAberration) const;

    51 	void  Nutation(const TReal& aJulianCenturies, TReal& aNutation) const;

    52 	void  j2000(TReal& aJ2000) const;

    53 	void  GetPoly(const TReal* aArray, const TReal& aOperand, TInt aCount, TReal& aResult) const;

    54 	void  PopulateTheta(TReal& aTheta, TInt aYear) const;

    55 	};

    56 

    57 #endif