Panzer_ResponseScatterEvaluator_Probe_impl.hpp

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#ifndef PANZER_RESPONSE_SCATTER_EVALUATOR_EXTREMEVALUE_IMPL_HPP
#define PANZER_RESPONSE_SCATTER_EVALUATOR_EXTREMEVALUE_IMPL_HPP

#include <iostream>
#include <string>

#include "PanzerDiscFE_config.hpp"

#include "Phalanx_Evaluator_Macros.hpp"
#include "Phalanx_MDField.hpp"
#include "Phalanx_DataLayout_MDALayout.hpp"

#include "Panzer_CellData.hpp"
#include "Panzer_PointRule.hpp"
#include "Panzer_CommonArrayFactories.hpp"
#include "Panzer_ResponseBase.hpp"
#include "Panzer_Dimension.hpp"
#include "Panzer_GlobalEvaluationDataContainer.hpp"

#include "Intrepid2_FunctionSpaceTools.hpp"

#include "Thyra_SpmdVectorBase.hpp"
#include "Teuchos_ArrayRCP.hpp"

#include "Kokkos_ViewFactory.hpp"

namespace panzer {

template<typename EvalT, typename Traits, typename LO, typename GO>
ResponseScatterEvaluator_ProbeBase<EvalT,Traits,LO,GO>::
ResponseScatterEvaluator_ProbeBase(
  const std::string & responseName,
  const std::string & fieldName,
  const int fieldComponent,
  const Teuchos::Array<double>& point,
  const IntegrationRule & ir,
  const Teuchos::RCP<const PureBasis>& basis,
  const Teuchos::RCP<const panzer::GlobalIndexer> & indexer,
  const Teuchos::RCP<ProbeScatterBase> & probeScatter)
  : responseName_(responseName)
  , fieldName_(fieldName)
  , fieldComponent_(fieldComponent)
  , point_(point)
  , basis_(basis)
  , topology_(ir.topology)
  , globalIndexer_(indexer)
  , scatterObj_(probeScatter)
  , cellIndex_(0)
{
  using Teuchos::RCP;
  using Teuchos::rcp;

  // the field manager will allocate all of these fields
  field_ = PHX::MDField<const ScalarT,Cell,BASIS>(fieldName,basis_->functional);
  this->addDependentField(field_);

  num_basis = basis->cardinality();
  num_dim = basis->dimension();
  TEUCHOS_ASSERT(num_dim == static_cast<size_t>(point_.size()));

  basis_values_ = Kokkos::DynRankView<double,PHX::Device>(
    "basis_values", 1, num_basis, 1); // Cell, Basis, Point

  // build dummy target tag
  std::string dummyName =
    ResponseBase::buildLookupName(responseName) + " dummy target";
  RCP<PHX::DataLayout> dl_dummy = rcp(new PHX::MDALayout<panzer::Dummy>(0));
  scatterHolder_ = rcp(new PHX::Tag<ScalarT>(dummyName,dl_dummy));
  this->addEvaluatedField(*scatterHolder_);

  std::string n = "Probe Response Scatter: " + responseName;
  this->setName(n);
}

template<typename EvalT, typename Traits, typename LO, typename GO>
void ResponseScatterEvaluator_ProbeBase<EvalT,Traits,LO,GO>::
preEvaluate(typename Traits::PreEvalData d)
{
  // extract linear object container
  responseObj_ =
    Teuchos::rcp_dynamic_cast<Response_Probe<EvalT> >(
      d.gedc->getDataObject(ResponseBase::buildLookupName(responseName_)),
      true);
}


template<typename EvalT, typename Traits, typename LO, typename GO>
bool ResponseScatterEvaluator_ProbeBase<EvalT,Traits,LO,GO>::
computeBasisValues(typename Traits::EvalData d)
{
  typedef Intrepid2::CellTools<PHX::exec_space> CTD;
  typedef Intrepid2::FunctionSpaceTools<PHX::exec_space> FST;

  const int num_points = 1; // Always a single point in this evaluator!
  Kokkos::DynRankView<int,PHX::Device> inCell("inCell", this->wda(d).cell_vertex_coordinates.extent_int(0), num_points);
  Kokkos::DynRankView<double,PHX::Device> physical_points_cell("physical_points_cell", this->wda(d).cell_vertex_coordinates.extent_int(0), num_points, num_dim);
  for (panzer::index_t cell(0); cell < d.num_cells; ++cell)
    for (size_t dim=0; dim<num_dim; ++dim)
      physical_points_cell(cell,0,dim) = point_[dim];

  const double tol = 1.0e-12;
  CTD::checkPointwiseInclusion(inCell,
                               physical_points_cell,
                               this->wda(d).cell_vertex_coordinates.get_view(),
                               *topology_,
                               tol);

  // Find which cell contains our point
  cellIndex_ = -1;
  bool haveProbe = false;
  for (index_t cell=0; cell<static_cast<int>(d.num_cells); ++cell) {
    // CTD::checkPointwiseInclusion(inCell,
    //                              physical_points_cell,
    //                              this->wda(d).cell_vertex_coordinates,
    //                              *topology_,
    //                              cell);

    if (inCell(cell,0) == 1) {
      cellIndex_ = cell;
      haveProbe = true;
      break;
    }
  }

  // If no cell does, we're done
  if (!haveProbe) {
    return false;
  }

  // Map point to reference frame
  const size_t num_vertex = this->wda(d).cell_vertex_coordinates.extent(1);
  Kokkos::DynRankView<double,PHX::Device> cell_coords(
    "cell_coords", 1, num_vertex, num_dim); // Cell, Basis, Dim
  for (size_t i=0; i<num_vertex; ++i) {
    for (size_t j=0; j<num_dim; ++j) {
      cell_coords(0,i,j) = this->wda(d).cell_vertex_coordinates(cellIndex_,i,j);
    }
  }
  Kokkos::DynRankView<double,PHX::Device> physical_points(
    "physical_points", 1, 1, num_dim); // Cell, Point, Dim
  for (size_t i=0; i<num_dim; ++i)
    physical_points(0,0,i) = physical_points_cell(0,0,i);
  Kokkos::DynRankView<double,PHX::Device> reference_points(
     "reference_points", 1, 1, num_dim); // Cell, Point, Dim
  CTD::mapToReferenceFrame(reference_points, physical_points, cell_coords,
                           *topology_);
  Kokkos::DynRankView<double,PHX::Device> reference_points_cell(
    "reference_points_cell", 1, num_dim); // Point, Dim
  for (size_t i=0; i<num_dim; ++i)
    reference_points_cell(0,i) = reference_points(0,0,i);

  // Compute basis functions at point
  if (basis_->getElementSpace() == PureBasis::CONST ||
      basis_->getElementSpace() == PureBasis::HGRAD) {

    // Evaluate basis at reference values
    Kokkos::DynRankView<double,PHX::Device>
      ref_basis_values("ref_basis_values", num_basis, 1); // Basis, Point
    basis_->getIntrepid2Basis()->getValues(ref_basis_values,
                                           reference_points_cell,
                                           Intrepid2::OPERATOR_VALUE);

    // Apply transformation to physical frame
    FST::HGRADtransformVALUE<double>(basis_values_, ref_basis_values);

  }
  else if (basis_->getElementSpace() == PureBasis::HCURL ||
           basis_->getElementSpace() == PureBasis::HDIV) {

    // Evaluate basis at reference values
    Kokkos::DynRankView<double,PHX::Device> ref_basis_values(
      "ref_basis_values", num_basis, 1, num_dim); // Basis, Point, Dim
    basis_->getIntrepid2Basis()->getValues(ref_basis_values,
                                           reference_points_cell,
                                           Intrepid2::OPERATOR_VALUE);

    // Apply transformation to physical frame
    Kokkos::DynRankView<double,PHX::Device> jac
      ("jac", 1, 1, num_dim, num_dim); // Cell, Point, Dim, Dim
    CTD::setJacobian(jac, reference_points, cell_coords, *topology_);
    Kokkos::DynRankView<double,PHX::Device> basis_values_vec(
      "basis_values_vec", 1, num_basis, 1, num_dim); // Cell, Basis, Point, Dim
    if (basis_->getElementSpace() == PureBasis::HCURL) {
      Kokkos::DynRankView<double,PHX::Device> jac_inv(
        "jac_inv", 1, 1, num_dim, num_dim); // Cell, Point, Dim, Dim
      CTD::setJacobianInv(jac_inv, jac);
      FST::HCURLtransformVALUE<double>(basis_values_vec, jac_inv,
                                       ref_basis_values);
    }
    else {
      Kokkos::DynRankView<double,PHX::Device> jac_det(
        "jac_det", 1, 1); // Cell Point
      CTD::setJacobianDet(jac_det, jac);
      FST::HDIVtransformVALUE<double>(basis_values_vec, jac, jac_det,
                                      ref_basis_values);
    }

    // Compute element orientations
    std::vector<double> orientation;
    globalIndexer_->getElementOrientation(cellIndex_, orientation);
    std::string blockId = this->wda(d).block_id;
    int fieldNum = globalIndexer_->getFieldNum(fieldName_);
    const std::vector<int> & elmtOffset =
      globalIndexer_->getGIDFieldOffsets(blockId,fieldNum);

    // Extract component of basis
    for (size_t i=0; i<num_basis; ++i) {
      int offset = elmtOffset[i];
      basis_values_(0,i,0) =
        orientation[offset] * basis_values_vec(0,i,0,fieldComponent_);
    }

  }

  return true;
}

template<typename EvalT, typename Traits, typename LO, typename GO>
void ResponseScatterEvaluator_ProbeBase<EvalT,Traits,LO,GO>::
evaluateFields(typename Traits::EvalData d)
{
  // Compute basis values at point
  const bool haveProbe = computeBasisValues(d);

  if (!haveProbe)
    return;

  // Get field coefficients for cell
  Kokkos::DynRankView<ScalarT,typename PHX::DevLayout<ScalarT>::type,PHX::Device> field_coeffs =
    Kokkos::createDynRankView(field_.get_static_view(), "field_val",
                              1, num_basis); // Cell, Basis
  for (size_t i=0; i<num_basis; ++i)
    field_coeffs(0,i) = field_(cellIndex_,i);

  // Evaluate FE interpolant at point
  Kokkos::DynRankView<ScalarT,typename PHX::DevLayout<ScalarT>::type,PHX::Device> field_val =
    Kokkos::createDynRankView(field_coeffs, "field_val", 1, 1); // Cell, Point
  Intrepid2::FunctionSpaceTools<PHX::exec_space>::evaluate(
    field_val, field_coeffs, basis_values_);
  responseObj_->value = field_val(0,0);
  responseObj_->have_probe = true;
}

template <typename LO, typename GO>
void ResponseScatterEvaluator_Probe<panzer::Traits::Jacobian,panzer::Traits,LO,GO>::
evaluateFields(panzer::Traits::EvalData d)
{
  using Teuchos::RCP;
  using Teuchos::rcp_dynamic_cast;
  using Thyra::SpmdVectorBase;

  TEUCHOS_ASSERT(this->scatterObj_!=Teuchos::null);

  Base::evaluateFields(d);

  // grab local data for inputing
  Teuchos::ArrayRCP<double> local_dgdx;
  RCP<SpmdVectorBase<double> > dgdx =
    rcp_dynamic_cast<SpmdVectorBase<double> >(this->responseObj_->getGhostedVector());
  dgdx->getNonconstLocalData(ptrFromRef(local_dgdx));
  TEUCHOS_ASSERT(!local_dgdx.is_null());

  this->scatterObj_->scatterDerivative(this->responseObj_->value,
                                       this->cellIndex_,
                                       this->responseObj_->have_probe,
                                       d,this->wda,
                                       local_dgdx);
}

}

#endif