itkVectorIndexSelectionCastImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkVectorIndexSelectionCastImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2003/09/10 14:28:59 $
  Version:   $Revision: 1.8 $

  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 __itkVectorIndexSelectionCastImageFilter_h
#define __itkVectorIndexSelectionCastImageFilter_h

#include "itkUnaryFunctorImageFilter.h"

namespace itk
{
  
namespace Functor {  
  
template< class TInput, class TOutput>
class VectorIndexSelectionCast
{
public:
  VectorIndexSelectionCast() {m_Index = 0;}
  ~VectorIndexSelectionCast() {}

  unsigned int GetIndex() const { return m_Index; }
  void SetIndex(unsigned int i) { m_Index = i; }

  inline TOutput operator()( const TInput & A )
  {
    return static_cast<TOutput>( A[m_Index] );
  }
      
private:
  unsigned int m_Index;   
}; 
}
 
template <class TInputImage, class TOutputImage>
class ITK_EXPORT VectorIndexSelectionCastImageFilter :
    public
UnaryFunctorImageFilter<TInputImage,TOutputImage, 
                        Functor::VectorIndexSelectionCast< typename TInputImage::PixelType, 
                                                           typename TOutputImage::PixelType>   >
{
public:
  typedef VectorIndexSelectionCastImageFilter Self;
  typedef UnaryFunctorImageFilter<TInputImage,TOutputImage, 
                                  Functor::VectorIndexSelectionCast< typename TInputImage::PixelType, 
                                                                     typename TOutputImage::PixelType> > Superclass;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self> ConstPointer;
    
  itkNewMacro(Self);

  void SetIndex(unsigned int i)
    {
      if (i != this->GetFunctor().GetIndex())
        {
        this->GetFunctor().SetIndex(i);
        this->Modified();
        }
    }
  unsigned int GetIndex(void) const { return this->GetFunctor().GetIndex(); }

protected:
  VectorIndexSelectionCastImageFilter() {}
  virtual ~VectorIndexSelectionCastImageFilter() {}
    
private:
  VectorIndexSelectionCastImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
};
 
} // end namespace itk


#endif

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