OGS2VTK.cpp

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// SPDX-FileCopyrightText: Copyright (c) OpenGeoSys Community (opengeosys.org)
// SPDX-License-Identifier: BSD-3-Clause
 
#include <tclap/CmdLine.h>
 
#include <memory>
#include <string>
 
#include "BaseLib/Logging.h"
#include "BaseLib/MPI.h"
#include "BaseLib/TCLAPArguments.h"
#include "InfoLib/GitInfo.h"
#include "MeshLib/IO/VtkIO/VtuInterface.h"
#include "MeshLib/IO/readMeshFromFile.h"
#include "MeshLib/Mesh.h"
 
int main(int argc, char* argv[])
{
    TCLAP::CmdLine cmd(
        "Converts OGS mesh into VTK mesh.\n\n"
        "OpenGeoSys-6 software, version " +
            GitInfoLib::GitInfo::ogs_version +
            ".\n"
            "Copyright (c) 2012-2026, OpenGeoSys Community "
            "(http://www.opengeosys.org)",
        ' ', GitInfoLib::GitInfo::ogs_version);
    TCLAP::ValueArg<std::string> mesh_in(
        "i", "mesh-input-file",
        "Input (.msh). The name of the file containing the input mesh", true,
        "", "INPUT_FILE");
    cmd.add(mesh_in);
    TCLAP::ValueArg<std::string> mesh_out(
        "o", "mesh-output-file",
        "Output (.vtk), The name of the file the mesh will be written to", true,
        "", "OUTPUT_FILE");
    cmd.add(mesh_out);
    auto log_level_arg = BaseLib::makeLogLevelArg();
    cmd.add(log_level_arg);
    TCLAP::SwitchArg use_ascii_arg(
        "", "ascii_output",
        "Write VTU output in ASCII file. Due to possible rounding the ascii "
        "output could result in lower accuracy");
    cmd.add(use_ascii_arg);
    cmd.parse(argc, argv);
 
    BaseLib::MPI::Setup mpi_setup(argc, argv);
    BaseLib::initOGSLogger(log_level_arg.getValue());
 
    std::unique_ptr<MeshLib::Mesh const> mesh(
        MeshLib::IO::readMeshFromFile(mesh_in.getValue()));
    if (!mesh)
    {
        return EXIT_FAILURE;
    }
    INFO("Mesh read: {:d} nodes, {:d} elements.", mesh->getNumberOfNodes(),
         mesh->getNumberOfElements());
 
    auto const data_mode =
        use_ascii_arg.getValue() ? vtkXMLWriter::Ascii : vtkXMLWriter::Binary;
 
    MeshLib::IO::writeVtu(*mesh, mesh_out.getValue(), data_mode);
 
    return EXIT_SUCCESS;
}