itkLevelSetEquationTermBase.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 itkLevelSetEquationTermBase_h
#define itkLevelSetEquationTermBase_h

#include "itkObject.h"
#include "itkHeavisideStepFunctionBase.h"
#include "itksys/hash_set.hxx"

namespace itk
{
template< typename TInputImage, // Input image
          typename TLevelSetContainer >
class ITK_TEMPLATE_EXPORT LevelSetEquationTermBase : public Object
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(LevelSetEquationTermBase);

  using Self = LevelSetEquationTermBase;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;
  using Superclass = Object;

  itkTypeMacro( LevelSetEquationTermBase, Object );

  using InputImageType = TInputImage;
  using InputImagePointer = typename InputImageType::Pointer;
  using InputPixelType = typename InputImageType::PixelType;
  using InputPixelRealType = typename NumericTraits<InputPixelType>::RealType;

  using LevelSetContainerType = TLevelSetContainer;
  using LevelSetIdentifierType = typename LevelSetContainerType::LevelSetIdentifierType;
  using LevelSetContainerPointer = typename LevelSetContainerType::Pointer;
  using LevelSetType = typename LevelSetContainerType::LevelSetType;
  using LevelSetPointer = typename LevelSetContainerType::LevelSetPointer;
  using LevelSetOutputPixelType = typename LevelSetContainerType::OutputType;
  using LevelSetOutputRealType = typename LevelSetContainerType::OutputRealType;
  using LevelSetInputIndexType = typename LevelSetContainerType::InputIndexType;
  using LevelSetGradientType = typename LevelSetContainerType::GradientType;
  using LevelSetHessianType = typename LevelSetContainerType::HessianType;
  using LevelSetDataType = typename LevelSetContainerType::LevelSetDataType;

  using DomainMapImageFilterType = typename LevelSetContainerType::DomainMapImageFilterType;
  using CacheImageType = typename LevelSetContainerType::CacheImageType;

  using HeavisideType = HeavisideStepFunctionBase< LevelSetOutputRealType,
                                     LevelSetOutputRealType >;
//  using HeavisidePointer = typename HeavisideType::Pointer;
  using HeavisideConstPointer = typename HeavisideType::ConstPointer;

  itkSetObjectMacro( Input, InputImageType );
  itkGetModifiableObjectMacro(Input, InputImageType );

  itkSetMacro( Coefficient, LevelSetOutputRealType );
  itkGetMacro( Coefficient, LevelSetOutputRealType );

  itkSetMacro( CurrentLevelSetId, LevelSetIdentifierType );
  itkGetMacro( CurrentLevelSetId, LevelSetIdentifierType );

  itkGetModifiableObjectMacro(CurrentLevelSetPointer, LevelSetType );

  virtual void SetLevelSetContainer( LevelSetContainerType*ptr );
  itkGetModifiableObjectMacro(LevelSetContainer, LevelSetContainerType );

  virtual LevelSetOutputRealType Evaluate( const LevelSetInputIndexType& iP );

  virtual LevelSetOutputRealType Evaluate( const LevelSetInputIndexType& iP,
                                           const LevelSetDataType& iData );

  virtual void Initialize( const LevelSetInputIndexType& iP ) = 0;

  virtual void InitializeParameters() = 0;

  virtual void UpdatePixel( const LevelSetInputIndexType& iP,
                           const LevelSetOutputRealType & oldValue,
                           const LevelSetOutputRealType & newValue ) = 0;

  itkGetConstMacro( CFLContribution, LevelSetOutputRealType );

  itkSetStringMacro( TermName );
  itkGetStringMacro( TermName );

  virtual void Update() = 0;

  using RequiredDataType = itksys::hash_set< std::string >;

  const RequiredDataType & GetRequiredData() const;

protected:
  LevelSetEquationTermBase();

  ~LevelSetEquationTermBase() override = default;

  void SetUp();

  virtual LevelSetOutputRealType Value( const LevelSetInputIndexType& iP ) = 0;

  virtual LevelSetOutputRealType Value( const LevelSetInputIndexType& iP,
                                        const LevelSetDataType& iData ) = 0;

  InputImagePointer        m_Input;

  LevelSetContainerPointer m_LevelSetContainer;

  LevelSetIdentifierType   m_CurrentLevelSetId;

  LevelSetPointer          m_CurrentLevelSetPointer;

  LevelSetOutputRealType   m_Coefficient;

  LevelSetOutputRealType   m_CFLContribution;

  HeavisideConstPointer         m_Heaviside;

  std::string               m_TermName;

  RequiredDataType          m_RequiredData;
};
}

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

#endif