freVectorToPhaseAccessor.cxx

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/*=========================================================================

  Program:   F.R.E.E. - flexible registration evaluation engine
  Version:   v.1.0.0
  Date:      $Date: 2006/09/01 12:00:00 $
  Module:    $RCSfile: freVectorToPhaseAccessor.cxx,v $
  Language:  C++



  Copyright (c) 2007 Ralf o Floca (Department of Medical Informatics,
  Institute for Medical Biometry and Informatics, University of Heidelberg,
  Germany). All rights reserved.
  See FREECopyright.txt or http://www.mi.med.uni-hd.de/free/copyright.htm
  for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/


#include "freVectorToPhaseAccessor.h"

namespace FREE
{
namespace Accessor
{

  template <class TVector>
  typename VectorToPhaseAccessor<TVector>::ExternalType
  VectorToPhaseAccessor<TVector>::
  Get( const InternalType & input ) const
  {
    if (input[1]==0) return 0.0;

    InternalType normVector = input;
    normVector.Normalize();

    ExternalType dAngle = acos(normVector[0]);

    //checking if upper or lower demi circle
    if (normVector[1]<0) dAngle = (2*M_PI) - dAngle; 

    if (!m_bOutputAsRad) dAngle = 360*(dAngle/2*M_PI);

    return dAngle;
  }

  template <class TVector>
  VectorToPhaseAccessor<TVector>::
	VectorToPhaseAccessor()
        {
    m_bOutputAsRad = true;
        }

  template <class TVector>
  VectorToPhaseAccessor<TVector>::
	~VectorToPhaseAccessor()
        {
        }

} // namespace Accessor
} // namespace free

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