Linear_cell_complex/linear_cell_complex_3_vtk_io.cpp

#include <CGAL/Linear_cell_complex_for_combinatorial_map.h>
#include <CGAL/Linear_cell_complex/IO/VTK.h>
#include <vector>
#include <cstdlib>
 
int main()
{
  CGAL::Linear_cell_complex_for_combinatorial_map<3> lcc;
  std::ifstream is("data/beam-with-mixed-cells.3map");
  if(!is)
  {
    std::cout<<"Error opening data/beam-with-mixed-cells.3map."<<std::endl;
    return EXIT_FAILURE;
  }
 
  is>>lcc;
  // Compute per-volume vertex count
  std::vector<std::size_t> volume_scalars;
  for(auto it=lcc.template one_dart_per_cell<3>().begin(),
        itend=lcc.template one_dart_per_cell<3>().end(); it!=itend; ++it)
  {
    std::size_t nbv=lcc.template one_dart_per_incident_cell<0,3>(it).size();
    volume_scalars.push_back(nbv);
  }
 
  if(!CGAL::IO::write_VTK("beam-with-mixed-cells.vtk", lcc, nullptr,
                          &volume_scalars))
  {
    std::cout<<"Error for write_VTK."<<std::endl;
    return EXIT_FAILURE;
  }
 
  return EXIT_SUCCESS;
}