itkBSplineInterpolationWeightFunction2.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.
 *  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 itkBSplineInterpolationWeightFunction2_h
#define itkBSplineInterpolationWeightFunction2_h
 
#include "itkBSplineInterpolationWeightFunctionBase.h"
 
namespace itk
{

template <typename TCoordinate = float, unsigned int VSpaceDimension = 2, unsigned int VSplineOrder = 3>
class ITK_TEMPLATE_EXPORT BSplineInterpolationWeightFunction2
  : public BSplineInterpolationWeightFunctionBase<TCoordinate, VSpaceDimension, VSplineOrder>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(BSplineInterpolationWeightFunction2);

  using Self = BSplineInterpolationWeightFunction2;
  using Superclass = BSplineInterpolationWeightFunctionBase<TCoordinate, VSpaceDimension, VSplineOrder>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(BSplineInterpolationWeightFunction2);

  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;
 
protected:
  BSplineInterpolationWeightFunction2() = default;
  ~BSplineInterpolationWeightFunction2() override = default;

  using typename Superclass::KernelType;
  using typename Superclass::DerivativeKernelType;
  using typename Superclass::SecondOrderDerivativeKernelType;
  using typename Superclass::OneDWeightsType;
  using typename Superclass::WeightArrayType;
 
  /* Compute the 1D weights, which are:
   * [ \beta^3( x[i] - startIndex[i] ), \beta^3( x[i] - startIndex[i] - 1 ),
   * \beta^3( x[i] - startIndex[i] - 2 ), \beta^3( x[i] - startIndex[i] - 3 ) ]
   */
  void
  Compute1DWeights(const ContinuousIndexType & index,
                   const IndexType &           startIndex,
                   OneDWeightsType &           weights1D) const override;
};
 
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkBSplineInterpolationWeightFunction2.hxx"
#endif
 
#endif