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/** \file delete_ho_nodes.cpp
\brief Delete higher order nodes
\example delete_ho_nodes.cpp
#include <MoFEM.hpp>
using namespace MoFEM;
// struct MyAddRemove: public moab::Interface::HONodeAddedRemoved {
// void node_added (EntityHandle node, EntityHandle element ) {
// cerr << "Node has beed added..." << endl;
// }
// void node_removed (EntityHandle node) {
// cerr << "Node has beed deleted..." << endl;
// }
// };
static char help[] = "...\n\n";
int main(int argc, char *argv[]) {
MoFEM::Core::Initialize(&argc, &argv, (char *)0, help);
try {
// global variables
char mesh_file_name[255];
PetscBool flg_file = PETSC_FALSE;
CHKERR PetscOptionsBegin(PETSC_COMM_WORLD, "", "Field to vertices options",
CHKERR PetscOptionsString("-my_file", "mesh file name", "", "mesh.h5m",
mesh_file_name, 255, &flg_file);
ierr = PetscOptionsEnd();
moab::Core mb_instance;
moab::Interface &moab = mb_instance;
ParallelComm *pcomm = ParallelComm::get_pcomm(&moab, MYPCOMM_INDEX);
if (pcomm == NULL)
pcomm = new ParallelComm(&moab, PETSC_COMM_WORLD);
const char *option;
option = "";
CHKERR moab.load_file(mesh_file_name, 0, option);
// Create MoFEM database
MoFEM::Core core(moab);
if (flg_file != PETSC_TRUE) {
"*** ERROR -my_file (MESH FILE NEEDED)");
Range all_tets, topo_nodes, mid_nodes;
CHKERR moab.get_entities_by_type(0, MBTET, all_tets);
CHKERR moab.get_connectivity(all_tets, topo_nodes, true);
CHKERR moab.get_connectivity(all_tets, mid_nodes, false);
std::cout << "\n Mesh contains of " << mid_nodes.size()
<< " nodes in total. ";
mid_nodes = subtract(mid_nodes, topo_nodes);
std::cout << mid_nodes.size() << " higher order nodes. \n";
for (int dim : {1, 2, 3}) {
EntityHandle sub_meshset;
CHKERR moab.create_meshset(MESHSET_SET, sub_meshset);
Range edges;
CHKERR moab.get_entities_by_dimension(0, dim, edges, false);
CHKERR moab.add_entities(sub_meshset, edges);
CHKERR moab.convert_entities(sub_meshset, false, false,
false /*,&my_add_remove*/);
Range new_nodes;
CHKERR moab.get_entities_by_type(0, MBVERTEX, new_nodes);
PetscPrintf(PETSC_COMM_WORLD, "New number of nodes: %d. \n",
PetscPrintf(PETSC_COMM_WORLD, "Saving file out.h5m... \n");
CHKERR moab.write_file("out.h5m");
return 0;
static char help[]
int main()
Definition: adol-c_atom.cpp:46
static PetscErrorCode ierr
Catch errors.
Definition: definitions.h:372
default communicator number PCOMM
Definition: definitions.h:215
#define CHKERRG(n)
Check error code of MoFEM/MOAB/PETSc function.
Definition: definitions.h:483
Definition: definitions.h:36
#define CHKERR
Inline error check.
Definition: definitions.h:535
const int dim
char mesh_file_name[255]
implementation of Data Operators for Forces and Sources
Definition: Common.hpp:10
Core (interface) class.
Definition: Core.hpp:82
static MoFEMErrorCode Initialize(int *argc, char ***args, const char file[], const char help[])
Initializes the MoFEM database PETSc, MOAB and MPI.
Definition: Core.cpp:72
static MoFEMErrorCode Finalize()
Checks for options to be called at the conclusion of the program.
Definition: Core.cpp:112