meshplot.C

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// The libMesh Finite Element Library.
// Copyright (C) 2002-2026 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
 
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
// libmesh includes
#include "libmesh/libmesh.h"
#include "libmesh/equation_systems.h"
#include "libmesh/mesh.h"
#include "libmesh/namebased_io.h"
 
using namespace libMesh;
 
// Open the mesh and solution file named in command line arguments,
// and plot them out to the given filename.
int main(int argc, char ** argv)
{
  LibMeshInit init(argc, argv);
 
  Mesh mesh(init.comm());
  EquationSystems es(mesh);
 
  if (argc < 3 || argc > 4)
    libmesh_error_msg
      ("Usage: " << argv[0] <<
       " inputmesh [inputsolution] outputplot");
 
  LOG_CALL("mesh.read()", "main", mesh.read(argv[1]));
 
  libMesh::out << "Loaded mesh " << argv[1] << std::endl;
  mesh.print_info();
 
  if (argc > 3)
    {
      std::string solnname = argv[2];
 
      LOG_CALL("es.read()", "main",
               es.read(solnname,
                       EquationSystems::READ_HEADER |
                       EquationSystems::READ_DATA |
                       EquationSystems::READ_ADDITIONAL_DATA |
                       EquationSystems::READ_BASIC_ONLY));
 
      libMesh::out << "Loaded solution " << solnname << std::endl;
      es.print_info();
    }
 
  std::string outputname(argv[argc-1]);
  {
    LOG_SCOPE("write_equation_systems()", "main");
    if ((outputname.find(".xda") != std::string::npos) ||
        (outputname.find(".xdr") != std::string::npos))
      {
        mesh.write("mesh-"+outputname);
        es.write("soln-"+outputname);
      }
    else
      NameBasedIO(mesh).write_equation_systems (outputname, es);
  }
 
  libMesh::out << "Wrote output " << outputname << std::endl;
 
  return 0;
}