NodalDamper.h

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//* This file is part of the MOOSE framework
//* https://www.mooseframework.org
//*
//* 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

#pragma once

// Moose Includes
#include "Damper.h"
#include "MaterialPropertyInterface.h"
#include "MooseTypes.h"

class SubProblem;
class SystemBase;
template <typename>
class MooseVariableFE;
typedef MooseVariableFE<Real> MooseVariable;
class Assembly;

class NodalDamper : public Damper, protected MaterialPropertyInterface
{
public:
  static InputParameters validParams();

  NodalDamper(const InputParameters & parameters);

  Real computeDamping();

  MooseVariable * getVariable() { return &_var; }

protected:
  virtual Real computeQpDamping() = 0;

  THREAD_ID _tid;
  Assembly & _assembly;

  const Moose::CoordinateSystemType & _coord_sys;

  MooseVariable & _var;

  const Node * const & _current_node;

  unsigned int _qp;

  const VariableValue & _u_increment;
  const VariableValue & _u;
};