Panzer_Integrator_DivBasisTimesScalar_impl.hpp

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#ifndef __Panzer_Integrator_DivBasisTimesScalar_impl_hpp__ 
#define __Panzer_Integrator_DivBasisTimesScalar_impl_hpp__ 
 
#include "Intrepid2_FunctionSpaceTools.hpp"
 
#include "Panzer_IntegrationRule.hpp"
#include "Panzer_BasisIRLayout.hpp"
#include "Panzer_Workset_Utilities.hpp"
#include "Kokkos_ViewFactory.hpp"
 
namespace panzer {
 
//**********************************************************************
template<typename EvalT, typename Traits>
Integrator_DivBasisTimesScalar<EvalT, Traits>::
Integrator_DivBasisTimesScalar(
  const Teuchos::ParameterList& p) :
  residual( p.get<std::string>("Residual Name"), 
      p.get< Teuchos::RCP<panzer::BasisIRLayout> >("Basis")->functional),
  basis_name(p.get< Teuchos::RCP<panzer::BasisIRLayout> >("Basis")->name())
{
  Teuchos::RCP<Teuchos::ParameterList> valid_params = this->getValidParameters();
  p.validateParameters(*valid_params);
 
  Teuchos::RCP<const PureBasis> basis 
     = p.get< Teuchos::RCP<BasisIRLayout> >("Basis")->getBasis();
 
  // Verify that this basis supports the curl operation
  TEUCHOS_TEST_FOR_EXCEPTION(!basis->supportsDiv(),std::logic_error,
                             "Integrator_DivBasisTimesScalar: Basis of type \"" << basis->name() << "\" does not support DIV.");
  TEUCHOS_TEST_FOR_EXCEPTION(!basis->requiresOrientations(),std::logic_error,
                             "Integration_DivBasisTimesScalar: Basis of type \"" << basis->name() << "\" should require orientations. So we are throwing.");
 
  scalar = PHX::MDField<const ScalarT,Cell,IP>( p.get<std::string>("Value Name"),
                                          p.get< Teuchos::RCP<panzer::IntegrationRule> >("IR")->dl_scalar );
 
  this->addEvaluatedField(residual);
  this->addDependentField(scalar);
  
  multiplier = p.get<double>("Multiplier");
  if (p.isType<Teuchos::RCP<const std::vector<std::string> > >("Field Multipliers")) {
 
    const std::vector<std::string>& field_multiplier_names = 
      *(p.get<Teuchos::RCP<const std::vector<std::string> > >("Field Multipliers"));
 
    for (const std::string & name : field_multiplier_names) {
      PHX::MDField<const ScalarT,Cell,IP> tmp_field(name, p.get< Teuchos::RCP<panzer::IntegrationRule> >("IR")->dl_scalar);
      field_multipliers.push_back(tmp_field);
    }
  }
 
  for (const auto & field : field_multipliers)
    this->addDependentField(field);
 
  std::string n = 
    "Integrator_DivBasisTimesScalar: " + residual.fieldTag().name();
 
  this->setName(n);
}
 
//**********************************************************************
template<typename EvalT, typename Traits>
void
Integrator_DivBasisTimesScalar<EvalT, Traits>::
postRegistrationSetup(
  typename Traits::SetupData sd,
  PHX::FieldManager<Traits>& fm)
{
  this->utils.setFieldData(residual,fm);
  this->utils.setFieldData(scalar,fm);
 
  for (auto & field : field_multipliers)
    this->utils.setFieldData(field,fm);
 
  num_nodes = residual.extent(1);
  num_qp = scalar.extent(1);
 
  basis_index = panzer::getBasisIndex(basis_name, (*sd.worksets_)[0], this->wda);
 
  tmp = Kokkos::createDynRankView(residual.get_static_view(),"tmp",scalar.extent(0), num_qp); 
}
 
//**********************************************************************
template<typename EvalT, typename Traits>
void
Integrator_DivBasisTimesScalar<EvalT, Traits>::
evaluateFields(
  typename Traits::EvalData workset)
{ 
  // zero the reisdual
  residual.deep_copy(ScalarT(0.0));
  
  for (index_t cell = 0; cell < workset.num_cells; ++cell) {
    for (std::size_t qp = 0; qp < num_qp; ++qp) {
      ScalarT tmpVar = 1.0;
      for (const auto & field : field_multipliers)
        tmpVar = tmpVar * field(cell,qp);
 
      // no dimension to loop over for scalar fields
      tmp(cell,qp) = multiplier * tmpVar * scalar(cell,qp);
    }
  }
  
  {
    // const Kokkos::DynRankView<double,PHX::Device> & weighted_div_basis = (this->wda(workset).bases[basis_index])->weighted_div_basis;
    const BasisValues2<double> & bv = *this->wda(workset).bases[basis_index];
 
    for (index_t cell = 0; cell < workset.num_cells; ++cell)
      for (std::size_t basis = 0; basis < num_nodes; ++basis) {
        for (std::size_t qp = 0; qp < num_qp; ++qp)
          residual(cell,basis) += tmp(cell,qp)*bv.weighted_div_basis(cell,basis,qp);
      }
  }
/*
  if(workset.num_cells>0) {
     Intrepid2::FunctionSpaceTools::
       integrate<ScalarT>(residual, tmp, 
                       this->wda(workset).bases[basis_index]->weighted_div_basis, 
           Intrepid2::COMP_CPP);
  }
*/
}
 
//**********************************************************************
 
template<typename EvalT, typename TRAITS>
Teuchos::RCP<Teuchos::ParameterList> 
Integrator_DivBasisTimesScalar<EvalT, TRAITS>::getValidParameters() const
{
  Teuchos::RCP<Teuchos::ParameterList> p = Teuchos::rcp(new Teuchos::ParameterList);
  p->set<std::string>("Residual Name", "?");
  p->set<std::string>("Value Name", "?");
  p->set<std::string>("Test Field Name", "?");
  Teuchos::RCP<panzer::BasisIRLayout> basis;
  p->set("Basis", basis);
  Teuchos::RCP<panzer::IntegrationRule> ir;
  p->set("IR", ir);
  p->set<double>("Multiplier", 1.0);
  Teuchos::RCP<const std::vector<std::string> > fms;
  p->set("Field Multipliers", fms);
  return p;
}
 
//**********************************************************************
 
}
 
#endif