itkFiniteDifferenceSparseImageFunction.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef __itkFiniteDifferenceSparseImageFunction_h
#define __itkFiniteDifferenceSparseImageFunction_h

#include "itkFiniteDifferenceFunction.h"

namespace itk
{
template< class TSparseImageType >
class ITK_EXPORT FiniteDifferenceSparseImageFunction:
  public FiniteDifferenceFunction< TSparseImageType >
{
public:

  typedef FiniteDifferenceSparseImageFunction          Self;
  typedef FiniteDifferenceFunction< TSparseImageType > Superclass;
  typedef SmartPointer< Self >                         Pointer;
  typedef SmartPointer< const Self >                   ConstPointer;

  itkTypeMacro(FiniteDifferenceSparseImageFunction, FiniteDifferenceFunction);

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

  typedef typename Superclass::PixelType        PixelType;
  typedef typename Superclass::TimeStepType     TimeStepType;
  typedef typename Superclass::RadiusType       RadiusType;
  typedef typename Superclass::NeighborhoodType NeighborhoodType;
  typedef typename Superclass::FloatOffsetType  FloatOffsetType;
  typedef typename Superclass::ImageType        SparseImageType;

  typedef typename SparseImageType::IndexType IndexType;

  typedef typename SparseImageType::NodeType NodeType;

  typedef typename NodeType::NodeDataType NodeDataType;

  virtual PixelType ComputeUpdate(const NeighborhoodType &,
                                  void *,
                                  const FloatOffsetType &)
  {
    return static_cast< PixelType >( 0 );
  }

  virtual NodeDataType
  ComputeSparseUpdate( NeighborhoodType & neighborhood,
                       void *globalData,
                       const FloatOffsetType & offset = FloatOffsetType(0.0) )
  const = 0;

  virtual void PrecomputeSparseUpdate(NeighborhoodType &) const {}

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

private:
  FiniteDifferenceSparseImageFunction(const Self &); //purposely not implemented
  void operator=(const Self &);                      //purposely not implemented
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkFiniteDifferenceSparseImageFunction.hxx"
#endif

#endif