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Get List of Faces Around a Given Vertex

Synopsis

Get the list of faces around a given vertex.

Results

Results:

79
1961
2036
1960
1

These faces are visualized in the figures below.

The selected faces around the given vertex are highlighted in pink.

Interactive view of the selected faces

Code

C++

#include "itkMeshFileReader.h"
#include "itkQuadEdgeMesh.h"

int
main(int argc, char * argv[])
{
  if (argc != 3)
  {
    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0];
    std::cerr << " <InputFileName> <VertexId>";
    std::cerr << std::endl;
    return EXIT_FAILURE;
  }

  constexpr unsigned int Dimension = 3;

  using PixelType = double;
  using MeshType = itk::QuadEdgeMesh<PixelType, Dimension>;

  using ReaderType = itk::MeshFileReader<MeshType>;
  auto reader = ReaderType::New();
  reader->SetFileName(argv[1]);
  try
  {
    reader->Update();
  }
  catch (const itk::ExceptionObject & e)
  {
    std::cerr << e.what() << std::endl;
    return EXIT_FAILURE;
  }

  MeshType::Pointer mesh = reader->GetOutput();

  MeshType::PointIdentifier id = std::stoi(argv[2]);

  MeshType::QEType * qe = mesh->FindEdge(id);

  MeshType::QEType * temp = qe;
  do
  {
    std::cout << temp->GetLeft() << std::endl;
    temp = temp->GetOnext();
  } while (qe != temp);

  return EXIT_SUCCESS;
}

Classes demonstrated

template<typename TPixel, unsigned int VDimension, typename TTraits = QuadEdgeMeshTraits<TPixel, VDimension, bool, bool>>
class QuadEdgeMesh : public itk::Mesh<TPixel, VDimension, TTraits>

Mesh class for 2D manifolds embedded in ND space.

This implementation was contributed as a paper to the Insight Journal

https://www.insight-journal.org/browse/publication/122

Author

Alexandre Gouaillard, Leonardo Florez-Valencia, Eric Boix

See itk::QuadEdgeMesh for additional documentation.