itkNormalQuadEdgeMeshFilter.h

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/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  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
 *
 *         https://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 itkNormalQuadEdgeMeshFilter_h
#define itkNormalQuadEdgeMeshFilter_h
 
#include "itkQuadEdgeMeshToQuadEdgeMeshFilter.h"
#include "itkQuadEdgeMeshPolygonCell.h"
#include "itkTriangleHelper.h"
#include "ITKQuadEdgeMeshFilteringExport.h"
namespace itk
{
class NormalQuadEdgeMeshFilterEnums
{
public:
  enum class Weight : uint8_t
  {
    GOURAUD = 0, // Uniform weights
    THURMER,     // Angle on a triangle at the given vertex
    AREA
  };
};
// Define how to print enumeration
extern ITKQuadEdgeMeshFiltering_EXPORT std::ostream &
operator<<(std::ostream & out, const NormalQuadEdgeMeshFilterEnums::Weight value);

template <typename TInputMesh, typename TOutputMesh>
class ITK_TEMPLATE_EXPORT NormalQuadEdgeMeshFilter : public QuadEdgeMeshToQuadEdgeMeshFilter<TInputMesh, TOutputMesh>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(NormalQuadEdgeMeshFilter);
 
  using Self = NormalQuadEdgeMeshFilter;
  using Superclass = QuadEdgeMeshToQuadEdgeMeshFilter<TInputMesh, TOutputMesh>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;
 
  itkNewMacro(Self);
 
  itkOverrideGetNameOfClassMacro(NormalQuadEdgeMeshFilter);
 
  using InputMeshType = TInputMesh;
  using InputMeshPointer = typename InputMeshType::Pointer;
  using InputPointIdentifier = typename InputMeshType::PointIdentifier;
  using InputPointType = typename InputMeshType::PointType;
  using InputVectorType = typename InputMeshType::VectorType;
  using InputQEType = typename InputMeshType::QEType;
 
  using OutputMeshType = TOutputMesh;
  using OutputMeshPointer = typename OutputMeshType::Pointer;
  using OutputPointType = typename OutputMeshType::PointType;
  using OutputVectorType = typename OutputPointType::VectorType;
  using OutputQEType = typename OutputMeshType::QEType;
  using OutputPointIdentifier = typename OutputMeshType::PointIdentifier;
  using OutputPointIdIterator = typename OutputMeshType::PointIdIterator;
  using OutputPointsContainerPointer = typename OutputMeshType::PointsContainerPointer;
  using OutputPointsContainerIterator = typename OutputMeshType::PointsContainerIterator;
  using OutputCellType = typename OutputMeshType::CellType;
  using OutputCellIdentifier = typename OutputMeshType::CellIdentifier;
  using OutputCellAutoPointer = typename OutputMeshType::CellAutoPointer;
  using OutputCellsContainerPointer = typename OutputMeshType::CellsContainerConstIterator;
  using OutputCellsContainerConstIterator = typename OutputMeshType::CellsContainerConstIterator;
 
  using TriangleType = TriangleHelper<OutputPointType>;
 
  using OutputPolygonType = QuadEdgeMeshPolygonCell<OutputCellType>;
  using OutputPolygonAutoPointer = typename OutputPolygonType::SelfAutoPointer;
 
  using OutputCellDataContainer = typename OutputMeshType::CellDataContainer;
  using OutputPointDataContainer = typename OutputMeshType::PointDataContainer;
 
  using OutputMeshTraits = typename OutputMeshType::MeshTraits;
  using OutputVertexNormalType = typename OutputMeshTraits::PixelType;
  using OutputVertexNormalComponentType = typename OutputVertexNormalType::ValueType;
 
  using OutputFaceNormalType = typename OutputMeshTraits::CellPixelType;
  using OutputFaceNormalComponentType = typename OutputFaceNormalType::ValueType;
 
  using WeightEnum = NormalQuadEdgeMeshFilterEnums::Weight;
#if !defined(ITK_LEGACY_REMOVE)
  using WeightType = WeightEnum;
  static constexpr WeightEnum GOURAUD = WeightEnum::GOURAUD;
  static constexpr WeightEnum THURMER = WeightEnum::THURMER;
  static constexpr WeightEnum AREA = WeightEnum::AREA;
#endif
 
  itkSetEnumMacro(Weight, WeightEnum);
  itkGetConstMacro(Weight, WeightEnum);
 
protected:
  NormalQuadEdgeMeshFilter();
  ~NormalQuadEdgeMeshFilter() override = default;
  void
  PrintSelf(std::ostream & os, Indent indent) const override;
 
  WeightEnum m_Weight{};

  OutputFaceNormalType
  ComputeFaceNormal(OutputPolygonType * iPoly);

  void
  ComputeAllFaceNormals();

  void
  ComputeAllVertexNormals();

  OutputVertexNormalType
  ComputeVertexNormal(const OutputPointIdentifier & iId, OutputMeshType * outputMesh);

  OutputVertexNormalComponentType
  Weight(const OutputPointIdentifier & iPId, const OutputCellIdentifier & iCId, OutputMeshType * outputMesh);

  void
  GenerateData() override;
};
} // namespace itk
 
#include "itkNormalQuadEdgeMeshFilter.hxx"
#endif