Intrepid2_CubatureControlVolumeBoundary.hpp

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// @HEADER
// *****************************************************************************
//                           Intrepid2 Package
//
// Copyright 2007 NTESS and the Intrepid2 contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef __INTREPID2_CUBATURE_CONTROLVOLUME_BOUNDARY_HPP__
#define __INTREPID2_CUBATURE_CONTROLVOLUME_BOUNDARY_HPP__

#include "Intrepid2_ConfigDefs.hpp"
#include "Intrepid2_Cubature.hpp"

#include "Shards_CellTopology.hpp"
#include "Intrepid2_CellTools.hpp"

#include "Intrepid2_FunctionSpaceTools.hpp"

namespace Intrepid2{
  
  template<typename DeviceType = void,
           typename pointValueType = double,
           typename weightValueType = double>
  class CubatureControlVolumeBoundary
    : public Cubature<DeviceType,pointValueType,weightValueType> {
  public:

    template<typename cubPointViewType,
             typename subcvCoordViewType,
             typename mapViewType>
    struct Functor {
        cubPointViewType        _cubPoints;
      const subcvCoordViewType      _subcvCoords;
      const mapViewType             _sideMap;

      KOKKOS_INLINE_FUNCTION
      Functor( cubPointViewType        cubPoints_,
               subcvCoordViewType      subcvCoords_,
               mapViewType             sideMap_ )
        : _cubPoints(cubPoints_), 
          _subcvCoords(subcvCoords_), _sideMap(sideMap_) {}

      KOKKOS_INLINE_FUNCTION
      void operator()(const ordinal_type cell) const {        
        const ordinal_type numNodesPerSide = _sideMap(0);
        const ordinal_type spaceDim        = _cubPoints.extent(1);

        // compute side centers
        typename cubPointViewType::value_type val[3] = {};
        for (ordinal_type j=0;j<numNodesPerSide;++j) {
          for (ordinal_type i=0;i<spaceDim;++i) 
            val[i] += _subcvCoords(cell, _sideMap(j+1), i);
        }
        for (ordinal_type i=0;i<spaceDim;++i) 
          _cubPoints(cell, i) = (val[i]/numNodesPerSide);
        
      }
    };

  protected:
    
    shards::CellTopology primaryCellTopo_;

    shards::CellTopology subcvCellTopo_;

    ordinal_type degree_;
    
    ordinal_type sideIndex_;

    // cubature points and weights associated with sub-control volume.
    Kokkos::View<ordinal_type**,Kokkos::HostSpace> boundarySidesHost_;
    Kokkos::View<ordinal_type**,Kokkos::LayoutRight,DeviceType> sideNodeMap_;
    Kokkos::DynRankView<pointValueType, DeviceType> sidePoints_;
    
  public:
    typedef typename Cubature<DeviceType,pointValueType,weightValueType>::PointViewType  PointViewType;
    typedef typename Cubature<DeviceType,pointValueType,weightValueType>::weightViewType weightViewType;

    using Cubature<DeviceType,pointValueType,weightValueType>::getCubature;

    virtual
    void
    getCubature( PointViewType  cubPoints,
                 weightViewType cubWeights,
                 PointViewType  cellCoords) const override;
    
    virtual
    ordinal_type
    getNumPoints() const override {
      // one control volume boundary cubature point per subcell node (for now)
      const ordinal_type sideDim = primaryCellTopo_.getDimension() - 1;
      return primaryCellTopo_.getNodeCount(sideDim, sideIndex_);
    }
    
    virtual
    ordinal_type 
    getDimension() const override {
      return primaryCellTopo_.getDimension();
    }
    
    virtual
    const char*
    getName() const override {
      return "CubatureControlVolumeBoundary";
    }

    CubatureControlVolumeBoundary(const shards::CellTopology cellTopology, 
                                  const ordinal_type         sideIndex);
    virtual ~CubatureControlVolumeBoundary() {}
    
  };

} 

#include "Intrepid2_CubatureControlVolumeBoundaryDef.hpp"

#endif