SmoothTransition.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
 
#pragma once
 
#include "MooseTypes.h"
 
class SmoothTransition
{
public:
  SmoothTransition(const Real & x_center, const Real & transition_width);
 
  virtual Real value(const Real & x, const Real & f1, const Real & f2) const = 0;
 
  const Real & leftEnd() const { return _x1; }
 
  const Real & rightEnd() const { return _x2; }
 
protected:
  const Real _x_center;
  const Real _transition_width;
 
  const Real _x1;
  const Real _x2;
};