itkVectorNearestNeighborInterpolateImageFunction.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkVectorNearestNeighborInterpolateImageFunction.h,v $
  Language:  C++
  Date:      $Date: 2009-03-03 15:11:45 $
  Version:   $Revision: 1.7 $

  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 __itkVectorNearestNeighborInterpolateImageFunction_h
#define __itkVectorNearestNeighborInterpolateImageFunction_h

#include "itkVectorInterpolateImageFunction.h"

namespace itk
{

template <class TInputImage, class TCoordRep = double>
class ITK_EXPORT VectorNearestNeighborInterpolateImageFunction : 
  public VectorInterpolateImageFunction<TInputImage,TCoordRep> 
{
public:

  typedef VectorNearestNeighborInterpolateImageFunction         Self;
  typedef VectorInterpolateImageFunction<TInputImage,TCoordRep> Superclass;
  typedef SmartPointer<Self>                                    Pointer;
  typedef SmartPointer<const Self>                              ConstPointer;

  itkNewMacro(Self);  

  itkTypeMacro(VectorNearestNeighborInterpolateImageFunction, 
    VectorInterpolateImageFunction);

  typedef typename Superclass::InputImageType InputImageType;
  typedef typename Superclass::PixelType      PixelType;
  typedef typename Superclass::ValueType      ValueType;
  typedef typename Superclass::RealType       RealType;

  itkStaticConstMacro(Dimension, unsigned int,
                       Superclass::Dimension);

  itkStaticConstMacro(ImageDimension, unsigned int,Superclass::ImageDimension);

  typedef typename Superclass::IndexType IndexType;

  typedef typename Superclass::ContinuousIndexType ContinuousIndexType;

  typedef typename Superclass::OutputType OutputType;

  virtual OutputType EvaluateAtContinuousIndex( 
    const ContinuousIndexType & index ) const
    {
    IndexType nindex;
    this->ConvertContinuousIndexToNearestIndex(index, nindex);
    return static_cast<OutputType>( this->GetInputImage()->GetPixel( nindex ) );
    }

protected:
  VectorNearestNeighborInterpolateImageFunction(){};
  ~VectorNearestNeighborInterpolateImageFunction(){};
  void PrintSelf(std::ostream& os, Indent indent) const
   { Superclass::PrintSelf( os, indent ); }

private:
  VectorNearestNeighborInterpolateImageFunction(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
};

} // end namespace itk

#endif