SphinxExamples/src/IO/Mesh/ReadMesh/Code.cxx

/*=========================================================================
 *
 *  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.
 *
 *=========================================================================*/
 
#include "itkMesh.h"
#include "itkMeshFileReader.h"
#include "itkMeshFileWriter.h"
 
int
main(int argc, char * argv[])
{
  if ((argc != 2) && (argc != 4))
  {
    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0];
    std::cerr << " <InputFileName> <id 1 (optional)> <id 2 (optional)>";
    std::cerr << std::endl;
    return EXIT_FAILURE;
  }
 
  constexpr unsigned int Dimension = 3;
 
  using CoordinateType = double;
  using MeshType = itk::Mesh<CoordinateType, Dimension>;
 
  using ReaderType = itk::MeshFileReader<MeshType>;
  auto reader = ReaderType::New();
  reader->SetFileName(argv[1]);
  reader->Update();
 
  MeshType::Pointer mesh = reader->GetOutput();
 
  if (argc == 4)
  {
    MeshType::PointIdentifier id1 = std::stoi(argv[2]);
    MeshType::PointIdentifier id2 = std::stoi(argv[3]);
 
    MeshType::PointType p = mesh->GetPoint(id1);
    MeshType::PointType q = mesh->GetPoint(id2);
 
    std::cout << p.EuclideanDistanceTo(q) << std::endl;
  }
 
  return EXIT_SUCCESS;
}