honodes.cpp

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#include <iostream>
#include <moab/Core.hpp>
#include "moab/ProgOptions.hpp"
 
using namespace moab;
using namespace std;
const char BRIEF_DESC[] = "Add higher order nodes to existing mesh, eg. hex8 to hex27 (default). "
                          "Use available options as desired.";
std::ostringstream LONG_DESC;
 
int main( int argc, char* argv[] )
{
    moab::Core* mb = new moab::Core();
    moab::ErrorCode rval;
    bool edge   = false;
    bool face   = false;
    bool volume = false;
 
    LONG_DESC << "mbhonodes tool reads a mesh file and adds higher order nodes." << std::endl
              << "Options to add higher order nodes on all volume or face or edge elements of the mesh "
                 "are supported"
              << std::endl
              << "Example1: Use the following command to create hex mid volume nodes, in.h5m is a hex8 "
                 "mesh"
              << std::endl
              << " -> mbhonodes -i in.h5m -o o.h5m -f -e" << std::endl
              << "Example2: Use the following command to create hex27 mesh o2.h5m, in.h5m is a hex8 mesh" << std::endl
              << " -> mbhonodes -i in.h5m -o o2.h5m" << std::endl;
 
    ProgOptions opts( LONG_DESC.str(), BRIEF_DESC );
    string inFileName = "";
    opts.addRequiredArg< string >( "inFile,i", "Specify the output file name string", &inFileName );
#ifdef MOAB_HAVE_HDF5
    string outFileName = "outfile.h5m";
#else
    string outFileName = "outfile.vtk";
#endif
    opts.addOpt< string >( "outFile,o", "Specify the output file name string (default outfile.h5m)", &outFileName );
    opts.addOpt< void >( "edge,e", "DO NOT create mid nodes along edge (default=true)", &edge );
    opts.addOpt< void >( "face,f", "DO NOT create face mid nodes (default=true)", &face );
    opts.addOpt< void >( "volume,v", "DO NOT create volume mid nodes (default=true)", &volume );
 
    opts.parseCommandLine( argc, argv );
 
    // load the input file
    rval = mb->load_mesh( inFileName.c_str() );MB_CHK_SET_ERR( rval, "Failed to write the mesh file" );
    std::cout << "Read input mesh file: " << inFileName << std::endl;
    moab::Range entities;
    moab::EntityHandle meshset;
 
    rval = mb->get_entities_by_type( 0, MBHEX, entities );MB_CHK_SET_ERR( rval, "Failed to get hex entities" );
    rval = mb->create_meshset( MESHSET_SET, meshset );MB_CHK_SET_ERR( rval, "Failed to create meshset" );
    rval = mb->add_entities( meshset, entities );MB_CHK_SET_ERR( rval, "Failed to add entitites to meshset" );
 
    rval = mb->convert_entities( meshset, !edge, !face, !volume );MB_CHK_SET_ERR( rval, "Failed to convert to higher dimension entities" );
 
    rval = mb->write_mesh( outFileName.c_str() );MB_CHK_SET_ERR( rval, "Failed to write the mesh file" );
    std::cout << "Wrote mesh file: " << outFileName << std::endl;
    delete mb;
}