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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";
CHKERR DMRegister_MoFEM(dm_name);
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;
static char help[]
int main()
Definition: adol-c_atom.cpp:46
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: DMMoFEM.cpp:412
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.
PetscErrorCode MoFEMErrorCode
MoFEM/PETSc error code.
Definition: Exceptions.hpp:56
implementation of Data Operators for Forces and Sources
Definition: Common.hpp:10
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.
Data structure to exchange data between mofem and User Loop Methods on entities.
boost::shared_ptr< FieldEntity > entPtr
keeps basic data about problem
Simple interface for fast problem set-up.
Definition: Simple.hpp:27
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:264
MoFEMErrorCode getOptions()
get options
Definition: Simple.cpp:180
MoFEMErrorCode getDM(DM *dm)
Get DM.
Definition: Simple.cpp:667
MoFEMErrorCode loadFile(const std::string options, const std::string mesh_file_name)
Load mesh file.
Definition: Simple.cpp:194
MoFEMErrorCode setFieldOrder(const std::string field_name, const int order, const Range *ents=NULL)
Set field order.
Definition: Simple.cpp:473
MoFEMErrorCode setUp(const PetscBool is_partitioned=PETSC_TRUE)
Setup problem.
Definition: Simple.cpp:611
MoFEMErrorCode getInterface(IFACE *&iface) const
Get interface refernce to pointer of interface.
MoFEMErrorCode operator()()
function is run for every finite element
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