Champ_Fonc_Interp.cpp

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#include <Discretisation_tools.h>
#include <Champ_Generique_base.h>
#include <Option_Interpolation.h>
#include <Champ_Fonc_Interp.h>
#include <TRUSTTab_parts.h>
#include <Comm_Group_MPI.h>
#include <Param.h>
#include <MEDLoader.hxx>
#ifdef MPI_
#include <ParaFIELD.hxx>
#endif
 
Implemente_instanciable(Champ_Fonc_Interp, "Champ_Fonc_Interp", Champ_Fonc_P0_base);
// XD Champ_Fonc_Interp champ_don_base Champ_Fonc_Interp BRACE Field that is interpolated from a distant domain via
// XD_CONT MEDCoupling (remapper).
 
Sortie& Champ_Fonc_Interp::printOn(Sortie& os) const { return Champ_Fonc_P0_base::printOn(os); }
 
Entree& Champ_Fonc_Interp::readOn(Entree& is)
{
#ifdef MEDCOUPLING_
  using namespace MEDCoupling;
 
  Param param(que_suis_je());
  Nom nom_pb_loc, nom_pb_dist, nom_dom_loc, nom_dom_dist, nat;
  param.ajouter("nom_champ", &nom_, Param::REQUIRED); // XD_ADD_P chaine
  // XD_CONT Name of the field (for example: temperature).
  param.ajouter("pb_loc", &nom_pb_loc, Param::REQUIRED); // XD_ADD_P chaine
  // XD_CONT Name of the local problem.
  param.ajouter("pb_dist", &nom_pb_dist, Param::REQUIRED); // XD_ADD_P chaine
  // XD_CONT Name of the distant problem.
  param.ajouter("dom_loc", &nom_dom_loc); // XD_ADD_P chaine
  // XD_CONT Name of the local domain.
  param.ajouter("dom_dist", &nom_dom_dist); // XD_ADD_P chaine
  // XD_CONT Name of the distant domain.
  param.ajouter("default_value", &default_value_); // XD_ADD_P chaine
  // XD_CONT Name of the distant domain.
  param.ajouter("nature", &nat, Param::REQUIRED); // XD_ADD_P chaine
  // XD_CONT Nature of the field (knowledge from MEDCoupling is required; IntensiveMaximum, IntensiveConservation, ...).
  param.ajouter("use_overlapdec", &use_dec_); // XD_ADD_P chaine
  // XD_CONT Nature of the field (knowledge from MEDCoupling is required; IntensiveMaximum, IntensiveConservation, ...).
  param.lire_avec_accolades_depuis(is);
 
  pb_loc_ = ref_cast(Probleme_base, Interprete::objet(nom_pb_loc));
  pb_dist_ = ref_cast(Probleme_base, Interprete::objet(nom_pb_dist));
  if (nom_dom_loc == "??") dom_loc_ = pb_loc_->domaine();
  else dom_loc_ = ref_cast(Domaine, Interprete::objet(nom_dom_loc));
  if (nom_dom_dist == "??") dom_dist_ = pb_dist_->domaine();
  else dom_dist_ = ref_cast(Domaine, Interprete::objet(nom_dom_dist));
 
  is_elem_trgt_ = (pb_loc_->domaine_dis().que_suis_je() != "Domaine_VEF");
 
  if (nat == "IntensiveMaximum") nature_ = IntensiveMaximum;
  else if (nat == "IntensiveConservation") nature_ = IntensiveConservation;
  else if (nat == "ExtensiveMaximum") nature_ = ExtensiveMaximum;
  else if (nat == "ExtensiveConservation") nature_ = ExtensiveConservation;
  else
    {
      Cerr << "Champ_Front_Interp : wrong NatureOfField read : " << nat << finl;
      Process::exit();
    }
 
  if (use_dec_ != -123)
    Option_Interpolation::USE_DEC = use_dec_;
  else
    use_dec_= Option_Interpolation::USE_DEC;
 
  return is;
#else
  Cerr << "Champ_Fonc_Interp::readOn should not be called since it requires a TRUST version compiled with MEDCoupling !" << finl;
  throw;
#endif
}
 
int Champ_Fonc_Interp::initialiser(double temps)
{
  const int ok = Champ_Fonc_P0_base::initialiser(temps);
  const Champ_base& ch = pb_dist_->has_champ(le_nom()) ? pb_dist_->get_champ(le_nom()) : pb_dist_->get_champ_post(le_nom()).get_champ(espace_stockage_);
 
  nb_compo_ = ch.valeurs().line_size();
 
  if (is_elem_trgt_)
    {
      valeurs_.resize(0, nb_compo_);
      dom_loc_->creer_tableau_elements(valeurs_);
    }
  else
    {
      Domaine_VF& dvf = ref_cast(Domaine_VF, pb_loc_->domaine_dis());
      valeurs_.resize(dvf.nb_faces(), nb_compo_);
      dvf.creer_tableau_faces(valeurs_);
      valeurs_elem_.resize(0, nb_compo_);
      dom_loc_->creer_tableau_elements(valeurs_elem_);
    }
 
  is_initialized_ = true;
  return ok;
}
 
void Champ_Fonc_Interp::init_fields()
{
#ifdef MEDCOUPLING_
  using namespace MEDCoupling;
 
  local_field_ = MEDCouplingFieldDouble::New(ON_CELLS, ONE_TIME);
  local_field_->setName(le_nom().getString());
  local_array_ = DataArrayDouble::New();
  // XXX Pb with MEDCoupling : OvelapDEC seems to modify the meshes ...
  if (Process::nproc() > 1 && use_dec_)
    {
      MCAuto<MEDCouplingUMesh> msh_cpy = dom_loc_->get_mc_mesh()->deepCopy();
      local_field_->setMesh(msh_cpy);
    }
  else
    local_field_->setMesh(dom_loc_->get_mc_mesh());
  local_field_->setNature(nature_);
 
  distant_field_ = MEDCouplingFieldDouble::New(ON_CELLS, ONE_TIME);
  distant_array_ = DataArrayDouble::New();
  distant_field_->setName(le_nom().getString());
  // XXX Pb with MEDCoupling : OvelapDEC seems to modify the meshes ...
  if (Process::nproc() > 1 && use_dec_)
    {
      MCAuto<MEDCouplingUMesh> msh_cpy = dom_dist_->get_mc_mesh()->deepCopy();
      distant_field_->setMesh(msh_cpy);
    }
  else
    distant_field_->setMesh(dom_dist_->get_mc_mesh());
  distant_field_->setNature(nature_);
#endif
}
 
void Champ_Fonc_Interp::update_fields()
{
#ifdef MEDCOUPLING_
  using namespace MEDCoupling;
 
  const Champ_base& ch = pb_dist_->has_champ(le_nom()) ? pb_dist_->get_champ(le_nom()) : pb_dist_->get_champ_post(le_nom()).get_champ(espace_stockage_);
 
  const DoubleTab& distant_values = ch.valeurs();
  ConstDoubleTab_parts local_parts(valeurs()), distant_parts(distant_values);
 
  if (local_field_ == nullptr) init_fields();
 
  // Target Stuff
  if (is_elem_trgt_)
    local_array_->useExternalArrayWithRWAccess(valeurs().addr(), local_parts[0].dimension(0), nb_compo_);
  else
    local_array_->useExternalArrayWithRWAccess(valeurs_elem_.addr(), valeurs_elem_.dimension(0), nb_compo_);
 
  local_field_->setArray(local_array_);
 
  // Source Stuff
  if (pb_dist_->domaine_dis().que_suis_je() == "Domaine_VEF"
      && pb_dist_->domaine_dis().nb_elem() > 0
      && distant_values.dimension_tot(0) == ref_cast(Domaine_VF, pb_dist_->domaine_dis()).nb_faces_tot())
    {
      Cerr << finl << "ERROR in Champ_Fonc_Interp : in problem " << pb_loc_->le_nom() << ", the distant field is located at faces!" << finl;
      Cerr << "Use a postprocessing field located at elements instead of " << le_nom() << finl;
      Cerr << "In your case, try : " << le_nom() << "_elem_" << pb_dist_->domaine().le_nom() << finl;
      Process::exit();
    }
 
  distant_array_->useArray(distant_values.addr(), false, MEDCoupling::DeallocType::CPP_DEALLOC, distant_parts[0].dimension(0), nb_compo_);
  distant_field_->setArray(distant_array_);
#endif
}
 
void Champ_Fonc_Interp::mettre_a_jour(double t)
{
#ifdef MEDCOUPLING_
  using MEDCoupling::WriteField;
  Champ_Fonc_P0_base::mettre_a_jour(t);
  if (!is_initialized_) return;
 
  if (Process::nproc() > 1 && use_dec_)
    {
#ifdef MPI_
      if (dom_loc_->get_mc_mesh() == nullptr) dom_loc_->build_mc_mesh();
      if (dom_dist_->get_mc_mesh() == nullptr) dom_dist_->build_mc_mesh();
 
      update_fields();
      OverlapDEC *dec = dom_loc_->get_dec(dom_dist_.valeur(), distant_field_, local_field_);
      /* the fields given to OverlapDEC can not be changed without calling synchronize... but we can change where they point to! */
      dec->setDefaultValue(default_value_);
      dec->getSourceLocalField()->getField()->setArray(distant_array_);
      dec->getTargetLocalField()->getField()->setArray(local_array_);
      dec->sendRecvData(true);
#endif
    }
  else
    {
      MEDCouplingRemapper *rmp = dom_loc_->get_remapper(dom_dist_.valeur());
      update_fields();
      rmp->transfer(distant_field_, local_field_, default_value_);
 
      if (verbose_)
        {
          WriteField("/tmp/source" + le_nom().getString() + Nom(Process::me()).getString() + ".med", distant_field_, true);
          WriteField("/tmp/target" + le_nom().getString() + Nom(Process::me()).getString() + ".med", local_field_, true);
        }
    }
 
  // Put values on faces !
  if (!is_elem_trgt_)
    {
      valeurs_elem_.echange_espace_virtuel();
      const Domaine_VF& dvf = ref_cast(Domaine_VF, pb_loc_->domaine_dis());
      Discretisation_tools::cells_to_faces(dvf, valeurs_elem_, valeurs());
    }
#endif
}