MFEMDotProductAux.h

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//* This file is part of the MOOSE framework
//* https://mooseframework.inl.gov
//*
//* All rights reserved, see COPYRIGHT for full restrictions
//* https://github.com/idaholab/moose/blob/master/COPYRIGHT
//*
//* Licensed under LGPL 2.1, please see LICENSE for details
//* https://www.gnu.org/licenses/lgpl-2.1.html

#ifdef MOOSE_MFEM_ENABLED
#pragma once

#include "MFEMAuxKernel.h"
#include "mfem.hpp"

class MFEMDotProductAux : public MFEMAuxKernel
{
public:
  static InputParameters validParams();

  MFEMDotProductAux(const InputParameters & parameters);
  ~MFEMDotProductAux() override = default;

  void execute() override;

protected:
  const VariableName _u_var_name;
  const VariableName _v_var_name;

  const mfem::ParGridFunction & _u_var;
  const mfem::ParGridFunction & _v_var;
  const mfem::real_t _scale_factor;

  mfem::VectorGridFunctionCoefficient _u_coef;
  mfem::VectorGridFunctionCoefficient _v_coef;
  mfem::InnerProductCoefficient _dot_uv;
  mfem::ConstantCoefficient _scale_c;

  mfem::ProductCoefficient _final_coef;
};

#endif // MOOSE_MFEM_ENABLED