itkMeshFileReader.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 itkMeshFileReader_h
#define itkMeshFileReader_h
 
#include "itkMeshFileReaderException.h"
#include "itkMacro.h"
#include "itkHexahedronCell.h"
#include "itkLineCell.h"
#include "itkPolyLineCell.h"
#include "itkMeshIOBase.h"
#include "itkMeshSource.h"
#include "itkPolygonCell.h"
#include "itkQuadrilateralCell.h"
#include "itkQuadraticEdgeCell.h"
#include "itkQuadraticTriangleCell.h"
#include "itkTetrahedronCell.h"
#include "itkTriangleCell.h"
#include "itkVertexCell.h"
 
#include "itkDefaultConvertPixelTraits.h"
#include "itkMeshConvertPixelTraits.h"
 
namespace itk
{
 
template <typename TOutputMesh,
          typename ConvertPointPixelTraits = MeshConvertPixelTraits<typename TOutputMesh::PixelType>,
          typename ConvertCellPixelTraits = MeshConvertPixelTraits<typename TOutputMesh::CellPixelType>>
class ITK_TEMPLATE_EXPORT MeshFileReader : public MeshSource<TOutputMesh>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(MeshFileReader);
 
  using Self = MeshFileReader;
  using Superclass = MeshSource<TOutputMesh>;
  using ConstPointer = SmartPointer<const Self>;
  using Pointer = SmartPointer<Self>;
 
  itkNewMacro(Self);
 
  itkOverrideGetNameOfClassMacro(MeshFileReader);
 
  using OutputMeshType = TOutputMesh;
  using OutputCoordRepType = typename OutputMeshType::CoordRepType;
  using OutputPointPixelType = typename OutputMeshType::PixelType;
  using OutputCellPixelType = typename OutputMeshType::CellPixelType;
  using OutputPointType = typename OutputMeshType::PointType;
  using OutputPointIdentifier = typename OutputMeshType::PointIdentifier;
  using OutputCellIdentifier = typename OutputMeshType::CellIdentifier;
  using OutputCellAutoPointer = typename OutputMeshType::CellAutoPointer;
  using OutputCellType = typename OutputMeshType::CellType;
  using SizeValueType = typename MeshIOBase::SizeValueType;
 
  using OutputVertexCellType = VertexCell<OutputCellType>;
  using OutputLineCellType = LineCell<OutputCellType>;
  using OutputPolyLineCellType = PolyLineCell<OutputCellType>;
  using OutputTriangleCellType = TriangleCell<OutputCellType>;
  using OutputPolygonCellType = PolygonCell<OutputCellType>;
  using OutputTetrahedronCellType = TetrahedronCell<OutputCellType>;
  using OutputHexahedronCellType = HexahedronCell<OutputCellType>;
  using OutputQuadrilateralCellType = QuadrilateralCell<OutputCellType>;
  using OutputQuadraticEdgeCellType = QuadraticEdgeCell<OutputCellType>;
  using OutputQuadraticTriangleCellType = QuadraticTriangleCell<OutputCellType>;
 
  static constexpr unsigned int OutputPointDimension = OutputMeshType::PointDimension;
 
  itkSetStringMacro(FileName);
  itkGetStringMacro(FileName);
  void
  SetMeshIO(MeshIOBase * meshIO);
  itkGetModifiableObjectMacro(MeshIO, MeshIOBase);
  void
  GenerateOutputInformation() override;
 
  template <typename T>
  void
  ReadPoints(T * buffer);
 
  template <typename T>
  void
  ReadCells(T * buffer);
 
  void
  ReadPointData();
 
  void
  ReadCellData();
 
protected:
  MeshFileReader();
  ~MeshFileReader() override = default;
  void
  PrintSelf(std::ostream & os, Indent indent) const override;
 
  template <typename T>
  void
  ConvertPointPixelBuffer(void * inputData, T * outputData, size_t numberOfPixels);
 
  template <typename T>
  void
  ConvertCellPixelBuffer(void * inputData, T * outputData, size_t numberOfPixels);
 
  void
  TestFileExistanceAndReadability();
 
  void
  GenerateData() override;
 
  MeshIOBase::Pointer m_MeshIO{};
  bool                m_UserSpecifiedMeshIO{}; // keep track whether the MeshIO is
                                               // user specified
  std::string m_FileName{};                    // The file to be read
 
private:
  template <typename T>
  void
  ReadPointsUsingMeshIO();
 
  template <typename T>
  void
  ReadCellsUsingMeshIO();
 
  std::string m_ExceptionMessage{};
};
 
 
template <typename TOutputMesh,
          typename ConvertPointPixelTraits = MeshConvertPixelTraits<typename TOutputMesh::PixelType>,
          typename ConvertCellPixelTraits = MeshConvertPixelTraits<typename TOutputMesh::CellPixelType>>
typename TOutputMesh::Pointer
ReadMesh(const std::string & filename)
{
  const auto reader = MeshFileReader<TOutputMesh, ConvertPointPixelTraits, ConvertCellPixelTraits>::New();
  reader->SetFileName(filename);
  reader->Update();
  return reader->GetOutput();
}
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkMeshFileReader.hxx"
#endif
 
#if defined ITK_MESHIO_FACTORY_REGISTER_MANAGER || defined ITK_IO_FACTORY_REGISTER_MANAGER
#  include "itkMeshIOFactoryRegisterManager.h"
#endif
 
#endif