itkBSplineInterpolationSecondOrderDerivativeWeightFunction.h

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 *  Copyright UMC Utrecht and contributors
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
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 *  See the License for the specific language governing permissions and
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#ifndef itkBSplineInterpolationSecondOrderDerivativeWeightFunction_h
#define itkBSplineInterpolationSecondOrderDerivativeWeightFunction_h
 
#include "itkBSplineInterpolationWeightFunctionBase.h"
#include <vnl/vnl_vector_fixed.h>
 
namespace itk
{

 
template <typename TCoordinate = float, unsigned int VSpaceDimension = 2, unsigned int VSplineOrder = 3>
class ITK_TEMPLATE_EXPORT BSplineInterpolationSecondOrderDerivativeWeightFunction
  : public BSplineInterpolationWeightFunctionBase<TCoordinate, VSpaceDimension, VSplineOrder>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(BSplineInterpolationSecondOrderDerivativeWeightFunction);

  using Self = BSplineInterpolationSecondOrderDerivativeWeightFunction;
  using Superclass = BSplineInterpolationWeightFunctionBase<TCoordinate, VSpaceDimension, VSplineOrder>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(BSplineInterpolationSecondOrderDerivativeWeightFunction);

  itkStaticConstMacro(SpaceDimension, unsigned int, VSpaceDimension);

  itkStaticConstMacro(SplineOrder, unsigned int, VSplineOrder);

  using typename Superclass::WeightsType;
  using typename Superclass::IndexType;
  using typename Superclass::SizeType;
  using typename Superclass::ContinuousIndexType;

  virtual void
  SetDerivativeDirections(unsigned int dir0, unsigned int dir1);
 
protected:
  BSplineInterpolationSecondOrderDerivativeWeightFunction();
  ~BSplineInterpolationSecondOrderDerivativeWeightFunction() override = default;

  using typename Superclass::KernelType;
  using typename Superclass::DerivativeKernelType;
  using typename Superclass::SecondOrderDerivativeKernelType;
  using typename Superclass::OneDWeightsType;

  void
  Compute1DWeights(const ContinuousIndexType & index,
                   const IndexType &           startIndex,
                   OneDWeightsType &           weights1D) const override;

  void
  PrintSelf(std::ostream & os, Indent indent) const override;
 
private:
  vnl_vector_fixed<double, 2> m_DerivativeDirections{};
  bool                        m_EqualDerivativeDirections{};
};
 
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkBSplineInterpolationSecondOrderDerivativeWeightFunction.hxx"
#endif
 
#endif