Panzer_IntegrationValues2.hpp

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#ifndef PANZER_INTEGRATION_VALUES2_HPP
#define PANZER_INTEGRATION_VALUES2_HPP

#include "Teuchos_RCP.hpp"

#include "PanzerDiscFE_config.hpp"
#include "Panzer_IntegrationRule.hpp"
#include "Panzer_ArrayTraits.hpp"
#include "Panzer_Dimension.hpp"
#include "Phalanx_MDField.hpp"
#include "Intrepid2_Cubature.hpp"

namespace panzer {

  template <typename Scalar>
  class IntegrationValues2 {
  public:
    typedef typename ArrayTraits<Scalar,PHX::MDField<Scalar> >::size_type size_type;

    typedef PHX::MDField<Scalar> ArrayDynamic;
    typedef PHX::MDField<double> DblArrayDynamic;

    typedef PHX::MDField<Scalar,IP> Array_IP;
    typedef PHX::MDField<Scalar,IP,Dim> Array_IPDim;

    typedef PHX::MDField<Scalar,Point> Array_Point;
    typedef PHX::MDField<Scalar,Cell,IP> Array_CellIP;
    typedef PHX::MDField<Scalar,Cell,IP,Dim> Array_CellIPDim;
    typedef PHX::MDField<Scalar,Cell,IP,Dim,Dim> Array_CellIPDimDim;

    typedef PHX::MDField<Scalar,Cell,BASIS,Dim> Array_CellBASISDim;

    IntegrationValues2(const std::string & pre="",bool allocArrays=false)
        : alloc_arrays(allocArrays), prefix(pre), ddims_(1,0) {}

    void setupArrays(const Teuchos::RCP<const panzer::IntegrationRule>& ir);

    void setupArraysForNodeRule(const Teuchos::RCP<const panzer::IntegrationRule>& ir);

    void evaluateValues(const PHX::MDField<Scalar,Cell,NODE,Dim> & vertex_coordinates,
                        const int num_cells = -1);

    void evaluateValues(const PHX::MDField<Scalar,Cell,NODE,Dim> & vertex_coordinates,
                        const PHX::MDField<Scalar,Cell,IP,Dim> & other_ip_coordinates,
                        const int num_cells = -1);

    Array_IPDim cub_points;              // <IP,Dim>
    Array_IPDim side_cub_points;         // <IP,Dim> points on face topology (dim-1)
    Array_IP cub_weights;                // <IP>
    Array_CellBASISDim node_coordinates; // <Cell,BASIS,Dim>
    Array_CellIPDimDim jac;              // <Cell,IP,Dim,Dim>
    Array_CellIPDimDim jac_inv;          // <Cell,IP,Dim,Dim>
    Array_CellIP jac_det;                // <Cell,IP>
    Array_CellIP weighted_measure;       // <Cell,IP>
    Array_CellIPDim weighted_normals;    // <Cell,IP,Dim>

    Array_CellIPDim surface_normals;    // <Cell,IP,Dim>
    Array_CellIPDimDim surface_rotation_matrices;    // <Cell,IP,Dim,Dim>
      // this (appears) is a matrix where the first row is the "normal" direction
      // and the remaining two rows lie in the hyperplane

    Teuchos::RCP<const panzer::IntegrationRule> int_rule;

    Teuchos::RCP<Intrepid2::Cubature<PHX::Device::execution_space,double,double>> intrepid_cubature;

    // for Shakib stabilization <Cell,IP,Dim,Dim>
    Array_CellIPDimDim covarient;
    Array_CellIPDimDim contravarient;
    Array_CellIP norm_contravarient;

    // integration points
    Array_CellIPDim ip_coordinates;      // <Cell,IP,Dim>
    Array_CellIPDim ref_ip_coordinates;  // <Cell,IP,Dim> for Control Volumes or Surface integrals

    DblArrayDynamic dyn_cub_points, dyn_side_cub_points, dyn_cub_weights;
    DblArrayDynamic dyn_phys_cub_points, dyn_phys_cub_weights, dyn_phys_cub_norms, dyn_node_coordinates;

    Array_Point scratch_for_compute_side_measure; // <Point> size: span() == jac.span()


    static void uniqueCoordOrdering(Array_CellIPDim & coords,
                                    int cell,
                                    int offset,
                                    std::vector<int> & order);

    void swapQuadraturePoints(int cell,int a,int b);

    static void convertNormalToRotationMatrix(const Scalar normal[3], Scalar transverse[3], Scalar binormal[3]);
    
  protected:



    // TODO: Make this a utility function that only exists in source file
    Teuchos::RCP<Intrepid2::Cubature<PHX::Device::execution_space,double,double>> getIntrepidCubature(const panzer::IntegrationRule & ir) const;


  private:
    bool alloc_arrays;
    std::string prefix;
    std::vector<PHX::index_size_type> ddims_;

    void generateSurfaceCubatureValues(const PHX::MDField<Scalar,Cell,NODE,Dim> & in_node_coordinates, const int in_num_cells);
    void getCubature(const PHX::MDField<Scalar,Cell,NODE,Dim> & in_node_coordinates, const int in_num_cells);
    void getCubatureCV(const PHX::MDField<Scalar,Cell,NODE,Dim> & in_node_coordinates, const int in_num_cells);
    void evaluateRemainingValues(const PHX::MDField<Scalar,Cell,NODE,Dim> & in_node_coordinates, const int in_num_cells);
    void evaluateValuesCV(const PHX::MDField<Scalar,Cell,NODE,Dim> & vertex_coordinates,const int in_num_cells);
  };

} // namespace panzer

#endif