itkEuclideanDistance.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkEuclideanDistance.h,v $
  Language:  C++
  Date:      $Date: 2002/09/11 19:57:14 $
  Version:   $Revision: 1.2 $

  Copyright (c) 2002 Insight 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 __itkEuclideanDistance_h
#define __itkEuclideanDistance_h

#include "itkNumericTraits.h"
#include "itkFixedArray.h"
#include "itkDistanceMetric.h"

namespace itk{ 
namespace Statistics{

template< class TVector >
class ITK_EXPORT EuclideanDistance : 
    public DistanceMetric< TVector >
{
public:
  typedef EuclideanDistance Self;
  typedef DistanceMetric< TVector > Superclass;
  typedef SmartPointer< Self > Pointer ; 

  itkStaticConstMacro(VectorLength, unsigned int, TVector::Length); 

  itkTypeMacro(EuclideanDistance, DistanceMetric);

  itkNewMacro(Self) ;

  typedef typename TVector::ValueType ValueType ;

  double Evaluate(const TVector &x) const ;
  double Evaluate(const TVector &x1, const TVector &x2) const ;
  double Evaluate(const ValueType &a, const ValueType &b) const ;

protected:
  EuclideanDistance() {}
  virtual ~EuclideanDistance() {} 
} ; // end of class

} // end of namespace Statistics 
} // end of namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkEuclideanDistance.txx"
#endif

#endif

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