/*

* Copyright (c) 2004 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

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

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:   Implementation of the Location effect base class

*

*/

// INCLUDE FILES

#ifdef _DEBUG

#include <e32svr.h>

#endif

#include <LocationBase.h>

#include <e32math.h>

#include <math.h>

//360 degrees:

#define TWO_PI 6283

//180 degrees:

#define PI 3142

//90 degrees:

#define QUARTER_PI 1570

// ============================ MEMBER FUNCTIONS ===============================

// -----------------------------------------------------------------------------

// CLocation::CLocation

// C++ default constructor can NOT contain any code, that

// might leave.

// -----------------------------------------------------------------------------

//

EXPORT_C CLocation::CLocation()

    : 	iLocationData(0,0,0,0,0,0),

    	iDataPckgTo(iLocationData),

    	iDataPckgFrom(iLocationData)

    {

    }

// Destructor

EXPORT_C CLocation::~CLocation()

    {

    }

// -----------------------------------------------------------------------------

// CLocation::LocationCartesian

// -----------------------------------------------------------------------------

//

EXPORT_C void CLocation::LocationCartesian(

	TInt32& aX, TInt32& aY, TInt32& aZ )

	{

	aX = iLocationData.iXCoordinate;

	aY = iLocationData.iYCoordinate;

	aZ = iLocationData.iZCoordinate;

	}

// -----------------------------------------------------------------------------

// CLocation::LocationSpherical

// -----------------------------------------------------------------------------

//

EXPORT_C void CLocation::LocationSpherical(

	TInt32& aAzimuth, TInt32& aElevation, TInt32& aRadius  )

	{

	aAzimuth = iLocationData.iAzimuth;

	aElevation = iLocationData.iElevation;

	aRadius = iLocationData.iRadius;

	}

// -----------------------------------------------------------------------------

// CLocation::SetLocationCartesianL

// -----------------------------------------------------------------------------

//

EXPORT_C void CLocation::SetLocationCartesianL(

	TInt32& aX, TInt32& aY, TInt32& aZ )

	{

	iLocationData.iXCoordinate = aX;

	iLocationData.iYCoordinate = aY;

	iLocationData.iZCoordinate = aZ;

    TReal SqrtXYZ = 0, squareX = 0, squareY = 0, squareZ = 0;

    Math::Pow(squareX, aX, 2);

    Math::Pow(squareY, aY, 2);

    Math::Pow(squareZ, aZ, 2);

    TReal sum = squareX + squareY + squareZ; 

    Math::Sqrt(SqrtXYZ, sum);

    //Singularity region 

       if(!((aX==0) && (aZ==0))) //was aY

       {

            TReal zDividedByXAtan = atan2 ((TReal)-aX, (TReal)-aZ);

            if (zDividedByXAtan > 0)

	          iLocationData.iAzimuth = - (TInt32)(zDividedByXAtan * 1000 + 0.5); // minus sign added (shouldn't affect the result since it is compensated three rows above, but to be sure...)

            else

 	          iLocationData.iAzimuth = - (TInt32)(zDividedByXAtan * 1000 - 0.5); // minus sign added (shouldn't affect the result since it is compensated three rows above, but to be sure...)

       }

	// else { we are exactly on Y-axis and therefore azimuth is undefined; let's use the previous azimuth value instead } 

       if (!((aX ==0) && (aY == 0) && (aZ == 0))) 

       {

         TReal result;

         TReal yDividedBySqrtXYZ = aY/SqrtXYZ; 

         User::LeaveIfError(Math::ASin(result, yDividedBySqrtXYZ)); //was ACos

         if (result > 0)

           iLocationData.iElevation = (TInt32) (result * 1000 + 0.5);

         else

           iLocationData.iElevation = (TInt32) (result * 1000 - 0.5);

       }

	   // else { we are exactly in origin and therefore elevation is undefined; let's use the previous elevation value instead } 

       iLocationData.iRadius= (TInt32) (SqrtXYZ + 0.5);

      while(iLocationData.iElevation > PI) 

       { 

	   iLocationData.iElevation = iLocationData.iElevation - TWO_PI; 

       }

      if(iLocationData.iElevation > QUARTER_PI) 

       {

	   iLocationData.iElevation = iLocationData.iElevation - (iLocationData.iElevation - QUARTER_PI) * 2;

	   iLocationData.iAzimuth = iLocationData.iAzimuth + PI;

       }

      while(iLocationData.iElevation < -PI) 

       {

	   iLocationData.iElevation = iLocationData.iElevation + TWO_PI;

       }

      if(iLocationData.iElevation < -QUARTER_PI) 

       {

	   iLocationData.iElevation = iLocationData.iElevation + (QUARTER_PI - iLocationData.iElevation) * 2;

	   iLocationData.iAzimuth = iLocationData.iAzimuth + PI;

       }

      while (iLocationData.iAzimuth < 0)

	    iLocationData.iAzimuth = iLocationData.iAzimuth + TWO_PI;

      while (iLocationData.iAzimuth > TWO_PI)

	   iLocationData.iAzimuth = iLocationData.iAzimuth - TWO_PI;

	}

// -----------------------------------------------------------------------------

// CLocation::SetLocationSphericalL

// -----------------------------------------------------------------------------

//

EXPORT_C void CLocation::SetLocationSphericalL(

	TInt32& aAzimuth, TInt32& aElevation, TInt32& aRadius  )

	{

     while(aElevation > PI) 

      { 

         aElevation = aElevation - TWO_PI; 

      }

     if(aElevation > QUARTER_PI) 

       {

	   aElevation = aElevation - (aElevation - QUARTER_PI) * 2;

	   aAzimuth = aAzimuth + PI;

       }

     while(aElevation < -PI) 

       {

	   aElevation = aElevation + TWO_PI;

       }

     if(aElevation < -QUARTER_PI) 

       {

	   aElevation = aElevation + (QUARTER_PI - aElevation) * 2;

	   aAzimuth = aAzimuth + PI;

       }

     while (aAzimuth < 0)

       aAzimuth = aAzimuth + TWO_PI;

     while (aAzimuth > TWO_PI)

	   aAzimuth = aAzimuth - TWO_PI;

   	iLocationData.iAzimuth = aAzimuth;

	iLocationData.iElevation = aElevation;

	iLocationData.iRadius = aRadius;

    TReal elevation = aElevation / 1000.0; // conversion from milliradians to radians because Sin and Cos functions eat radians

    TReal elevationSin;

    TReal elevationCos;

    User::LeaveIfError( Math::Sin( elevationSin, elevation ) );

    User::LeaveIfError( Math::Cos( elevationCos, elevation ) );

    TReal azimuthSin;

    TReal azimuthCos;

    User::LeaveIfError( Math::Sin( azimuthSin, aAzimuth / 1000.0) );

    User::LeaveIfError( Math::Cos( azimuthCos, aAzimuth / 1000.0) );

	iLocationData.iXCoordinate = (TInt32)(0.5 + aRadius * elevationCos * azimuthSin);

    iLocationData.iYCoordinate = (TInt32)(0.5 + aRadius * elevationSin);

    iLocationData.iZCoordinate = (TInt32)(0.5 - aRadius * elevationCos * azimuthCos);		

	}

// -----------------------------------------------------------------------------

// CLocation::DoEffectData

// -----------------------------------------------------------------------------

//

EXPORT_C const TDesC8& CLocation::DoEffectData()

	{

#ifdef _DEBUG

    RDebug::Print(_L("CLocation::DoEffectData"));

#endif

	iDataPckgTo = iLocationData;

	return iDataPckgTo;

	}

// -----------------------------------------------------------------------------

// CLocation::SetEffectData

// -----------------------------------------------------------------------------

//

EXPORT_C void CLocation::SetEffectData(

	const TDesC8& aEffectDataBuffer )

	{

#ifdef _DEBUG

    RDebug::Print(_L("CLocation::SetEffectData"));

#endif

	TEfLocationDataPckg dataPckg;

	dataPckg.Copy(aEffectDataBuffer);

	iLocationData = dataPckg();

	iEnabled = iLocationData.iEnabled;

	iEnforced = iLocationData.iEnforced;

	iHaveUpdateRights = iLocationData.iHaveUpdateRights;

	}

// ========================== OTHER EXPORTED FUNCTIONS =========================

// End of File