itkNormalQuadEdgeMeshFilter.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 itkNormalQuadEdgeMeshFilter_h
#define itkNormalQuadEdgeMeshFilter_h

#include "itkQuadEdgeMeshToQuadEdgeMeshFilter.h"
#include "itkQuadEdgeMeshPolygonCell.h"
#include "itkTriangleHelper.h"

namespace itk
{
template< typename TInputMesh, typename TOutputMesh >
class ITK_TEMPLATE_EXPORT NormalQuadEdgeMeshFilter:
  public QuadEdgeMeshToQuadEdgeMeshFilter< TInputMesh, TOutputMesh >
{
public:
  using Self = NormalQuadEdgeMeshFilter;
  using Superclass = QuadEdgeMeshToQuadEdgeMeshFilter< TInputMesh, TOutputMesh >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro (Self);

  itkTypeMacro (NormalQuadEdgeMeshFilter,
                QuadEdgeMeshToQuadEdgeMeshFilter);

  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;

  enum WeightType {
    GOURAUD = 0, // Uniform weights
    THURMER,     // Angle on a triangle at the given vertex
    AREA
    };

  itkSetMacro (Weight, WeightType);
  itkGetConstMacro (Weight, WeightType);

protected:
  NormalQuadEdgeMeshFilter();
  ~NormalQuadEdgeMeshFilter() override = default;
  void PrintSelf(std::ostream & os, Indent indent) const override;

  WeightType 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;

private:
  NormalQuadEdgeMeshFilter (const Self &) = delete;
  void operator=(const Self &) = delete;
};
}

#include "itkNormalQuadEdgeMeshFilter.hxx"
#endif