itkVectorInterpolateImageFunction.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkVectorInterpolateImageFunction.h,v $
  Language:  C++
  Date:      $Date: 2002/09/13 03:14:23 $
  Version:   $Revision: 1.11 $

  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 _itkVectorInterpolateImageFunction_h
#define _itkVectorInterpolateImageFunction_h

#include "itkImageFunction.h"
#include "itkVector.h"

namespace itk
{

template <typename T>
struct GetVectorDimension
{
  itkStaticConstMacro(VectorDimension, int, T::VectorDimension);
}; 

  
template <
class TInputImage,
class TCoordRep = float,
class TPixelType = typename TInputImage::PixelType
>
class ITK_EXPORT VectorInterpolateImageFunction : 
  public ImageFunction<
    TInputImage, 
    Vector< ITK_TYPENAME NumericTraits<typename TPixelType::ValueType>::RealType, 
      ::itk::GetVectorDimension<TPixelType>::VectorDimension>,
    TCoordRep > 
{
public:
  itkStaticConstMacro(VectorDimension, unsigned int,
                      TPixelType::VectorDimension);
  
  itkStaticConstMacro(ImageDimension, unsigned int,
                      TInputImage::ImageDimension);

  typedef VectorInterpolateImageFunction Self;
  typedef ImageFunction<TInputImage,
    Vector<double, itkGetStaticConstMacro(VectorDimension)>, TCoordRep > Superclass;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self>  ConstPointer;
  
  itkTypeMacro(VectorInterpolateImageFunction, ImageFunction);

  typedef typename Superclass::InputImageType InputImageType;
  typedef typename InputImageType::PixelType  PixelType;
  typedef typename PixelType::ValueType       ValueType;
  typedef typename NumericTraits<ValueType>::RealType  RealType;
    

  typedef typename Superclass::PointType PointType;

  typedef typename Superclass::IndexType IndexType;

  typedef typename Superclass::ContinuousIndexType ContinuousIndexType;

  typedef typename Superclass::OutputType OutputType;

  typedef TCoordRep CoordRepType;

  virtual OutputType Evaluate( const PointType& point ) const
    {
    ContinuousIndexType index;
    this->ConvertPointToContinuousIndex( point, index );
    return ( this->EvaluateAtContinuousIndex( index ) );
    }

  virtual OutputType EvaluateAtContinuousIndex( 
    const ContinuousIndexType & index ) const = 0;

  virtual OutputType EvaluateAtIndex( const IndexType & index ) const
    {
    OutputType output;
    PixelType input = m_Image->GetPixel( index );
    for( unsigned int k = 0; k < VectorDimension; k++ )
      {
      output[k] = static_cast<double>( input[k] );
      }
    return ( output );
    }

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

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

};

} // namespace itk

#endif

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