itkLabelObjectLineComparator.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkLabelObjectLineComparator.h,v $
  Language:  C++
  Date:      $Date: 2009-05-13 15:32:52 $
  Version:   $Revision: 1.1 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/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.

=========================================================================*/
#ifndef __itkLabelObjectLineComparator_h
#define __itkLabelObjectLineComparator_h

namespace itk
{

namespace Functor {

template< class TLabelObjectLine >
class LabelObjectLineComparator
{
public:
  bool operator()(TLabelObjectLine const& l1, TLabelObjectLine const& l2) const
    {
    const typename TLabelObjectLine::IndexType & idx1 = l1.GetIndex();
    const typename TLabelObjectLine::IndexType & idx2 = l2.GetIndex();
    
    for(int i=TLabelObjectLine::ImageDimension - 1; i>=0; i--)
      {
      if(idx1[i] < idx2[i])
        {
        return true;
        }
      else if(idx1[i] > idx2[i])
        {
        return false;
        }
      }
    return l1.GetLength() < l2.GetLength();
    }
};

}

}

#endif