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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkImageKernelOperator.txx,v $
  Language:  C++
  Date:      $Date: $
  Version:   $Revision: $

  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 __itkImageKernelOperator_txx
#define __itkImageKernelOperator_txx

#include "itkImageKernelOperator.h"

#include "itkImageRegionIterator.h"

#include "vnl/vnl_math.h"

namespace itk
{

template<class TPixel,unsigned int VDimension, class TAllocator>
typename ImageKernelOperator<TPixel,VDimension, TAllocator>
::CoefficientVector
ImageKernelOperator<TPixel,VDimension, TAllocator>
::GenerateCoefficients()
{
  CoefficientVector coeff;

  ImageRegionIterator<ImageType> It( this->m_ImageKernel, 
    this->m_ImageKernel->GetLargestPossibleRegion() ); 

  for( It.GoToBegin(); !It.IsAtEnd(); ++It )
    {
    coeff.push_back( It.Get() );
    }

  return coeff;
}

template<class TPixel, unsigned int VDimension, class TAllocator>
void
ImageKernelOperator<TPixel, VDimension, TAllocator>
::Fill( const CoefficientVector &coeff )
{
  // Initialize all coefficients to zero
  this->InitializeToZero();

  std::slice* temp_slice;
  typename CoefficientVector::const_iterator it;

  temp_slice = new std::slice( 0, coeff.size(), 1 );
  it = coeff.begin();

  typename Superclass::SliceIteratorType data( this, *temp_slice );
  delete temp_slice;

  // Copy the coefficients into the neighborhood, truncating them if there
  // are too many.
  for( data = data.Begin(); data < data.End(); ++data, ++it )
    {
    *data = static_cast<TPixel>(*it);
    }
}


}// end namespace itk

#endif