Make a loop over entities.

Make a loop over entities

/** \file loop_entities.cpp
\example loop_entities.cpp
\brief Make a loop over entities
#include <MoFEM.hpp>
using namespace MoFEM;
static char help[] = "...\n\n";
TestEntityMethod(const Range &ents)
: EntityMethod(), allEnts(ents) {}
entsIt = allEnts.begin();
if (entPtr->getEnt() != *entsIt)
"Entity and entity iterator should be the same");
if(entsIt != allEnts.end())
"All entities should be iterated");
const Range allEnts;
Range::const_iterator entsIt;
int main(int argc, char *argv[]) {
// initialize petsc
MoFEM::Core::Initialize(&argc, &argv, (char *)0, help);
try {
// read mesh and create moab and mofem data structures
moab::Core mb_instance;
moab::Interface &moab = mb_instance;
MoFEM::Core core(moab, PETSC_COMM_WORLD);
MoFEM::Interface &m_field = core;
// Register DM Manager
DMType dm_name = "DMMOFEM";
EntityHandle root_set = moab.get_root_set();
// Simple interface
Simple *simple_interface;
CHKERR m_field.getInterface(simple_interface);
// get options from command line
CHKERR simple_interface->getOptions();
// load mesh file
CHKERR simple_interface->loadFile();
// add fields
CHKERR simple_interface->addDomainField("FIELD1", H1,
// set fields order
CHKERR simple_interface->setFieldOrder("FIELD1", 4);
// setup problem
CHKERR simple_interface->setUp();
Range all_ents;
CHKERR m_field.get_moab().get_entities_by_handle(root_set, all_ents);
all_ents = subtract(all_ents, all_ents.subset_by_type(MBENTITYSET));
auto testingEntitiesInDatabase = [&]() {
TestEntityMethod method(all_ents);
CHKERR m_field.loop_entities("FIELD1", method);
CHKERR testingEntitiesInDatabase();
auto testingEntitiesInDatabaseSubRange = [&]() {
Range edges = all_ents.subset_by_type(MBEDGE);
TestEntityMethod method(edges);
CHKERR m_field.loop_entities("FIELD1", method, &edges);
CHKERR testingEntitiesInDatabaseSubRange();
auto dm = simple_interface->getDM();
auto testingEntitiesInDM = [&]() {
TestEntityMethod method(all_ents);
const MoFEM::Problem *prb_ptr;
CHKERR m_field.loop_entities(prb_ptr, "FIELD1", ROW, method, 0,
CHKERR testingEntitiesInDM();
// finish work cleaning memory, getting statistics, ect.
return 0;
Definition: definitions.h:123
Catch errors.
Definition: definitions.h:372
Ainsworth Cole (Legendre) approx. base .
Definition: definitions.h:60
#define MoFEMFunctionReturnHot(a)
Last executable line of each PETSc function used for error handling. Replaces return()
Definition: definitions.h:447
@ H1
continuous field
Definition: definitions.h:85
#define MoFEMFunctionBegin
First executable line of each MoFEM function, used for error handling. Final line of MoFEM functions ...
Definition: definitions.h:346
Definition: definitions.h:40
#define MoFEMFunctionReturn(a)
Last executable line of each PETSc function used for error handling. Replaces return()
Definition: definitions.h:416
#define CHKERR
Inline error check.
Definition: definitions.h:535
#define MoFEMFunctionBeginHot
First executable line of each MoFEM function, used for error handling. Final line of MoFEM functions ...
Definition: definitions.h:440
PetscErrorCode DMMoFEMGetProblemPtr(DM dm, const MoFEM::Problem **problem_ptr)
Get pointer to problem data structure.
Definition: DMMMoFEM.cpp:373
PetscErrorCode DMRegister_MoFEM(const char sname[])
Register MoFEM problem.
Definition: DMMMoFEM.cpp:47
virtual MoFEMErrorCode loop_entities(const std::string field_name, EntityMethod &method, Range const *const ents=nullptr, int verb=DEFAULT_VERBOSITY)=0
Loop over field entities.
int main(int argc, char *argv[])
static char help[]
PetscErrorCode MoFEMErrorCode
MoFEM/PETSc error code.
Definition: Exceptions.hpp:56
implementation of Data Operators for Forces and Sources
Definition: MoFEM.hpp:24
CoreTmp< 0 > Core
Definition: Core.hpp:1086
DeprecatedCoreInterface Interface
Definition: Interface.hpp:1955
virtual int get_comm_size() const =0
virtual moab::Interface & get_moab()=0
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
Deprecated interface functions.
boost::shared_ptr< FieldEntity > entPtr
keeps basic data about problem
Simple interface for fast problem set-up.
Definition: Simple.hpp:26
MoFEMErrorCode addDomainField(const std::string &name, const FieldSpace space, const FieldApproximationBase base, const FieldCoefficientsNumber nb_of_coefficients, const TagType tag_type=MB_TAG_SPARSE, const enum MoFEMTypes bh=MF_ZERO, int verb=-1)
Add field on domain.
Definition: Simple.cpp:374
MoFEMErrorCode getOptions()
get options
Definition: Simple.cpp:290
MoFEMErrorCode getDM(DM *dm)
Get DM.
Definition: Simple.cpp:806
MoFEMErrorCode loadFile(const std::string options, const std::string mesh_file_name)
Load mesh file.
Definition: Simple.cpp:304
MoFEMErrorCode setFieldOrder(const std::string field_name, const int order, const Range *ents=NULL)
Set field order.
Definition: Simple.cpp:589
MoFEMErrorCode setUp(const PetscBool is_partitioned=PETSC_TRUE)
Setup problem.
Definition: Simple.cpp:749
MoFEMErrorCode getInterface(IFACE *&iface) const
Get interface refernce to pointer of interface.
MoFEMErrorCode operator()()
function is run for every finite element
TestEntityMethod(const Range &ents)
MoFEMErrorCode preProcess()
function is run at the beginning of loop
MoFEMErrorCode postProcess()
function is run at the end of loop
Range::const_iterator entsIt
const Range allEnts