smoothness_estimator.h

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// ---------------------------------------------------------------------
//
// Copyright (C) 2018 - 2020 by the deal.II authors
//
// This file is part of the deal.II library.
//
// The deal.II library is free software; you can use it, redistribute
// it, and/or modify it under the terms of the GNU Lesser General
// Public License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// The full text of the license can be found in the file LICENSE.md at
// the top level directory of deal.II.
//
// ---------------------------------------------------------------------
 
#ifndef dealii_smoothness_estimator_h
#define dealii_smoothness_estimator_h
 
 
#include <deal.II/base/config.h>
 
#include <deal.II/fe/component_mask.h>
 
#include <deal.II/numerics/vector_tools.h>
 
#include <functional>
#include <vector>
 
 
DEAL_II_NAMESPACE_OPEN
 
 
// forward declarations
#ifndef DOXYGEN
template <typename Number>
class Vector;
 
namespace FESeries
{
  template <int dim, int spacedim>
  class Fourier;
  template <int dim, int spacedim>
  class Legendre;
} // namespace FESeries
 
namespace hp
{
  template <int dim, int spacedim>
  class DoFHandler;
  template <int dim, int spacedim>
  class FECollection;
} // namespace hp
#endif
 
 
namespace SmoothnessEstimator
{
  namespace Legendre
  {
    template <int dim, int spacedim, typename VectorType>
    void
    coefficient_decay(FESeries::Legendre<dim, spacedim> &  fe_legendre,
                      const hp::DoFHandler<dim, spacedim> &dof_handler,
                      const VectorType &                   solution,
                      Vector<float> &             smoothness_indicators,
                      const VectorTools::NormType regression_strategy =
                        VectorTools::Linfty_norm,
                      const double smallest_abs_coefficient = 1e-10,
                      const bool   only_flagged_cells       = false);
 
    template <int dim, int spacedim, typename VectorType>
    void
    coefficient_decay_per_direction(
      FESeries::Legendre<dim, spacedim> &  fe_legendre,
      const hp::DoFHandler<dim, spacedim> &dof_handler,
      const VectorType &                   solution,
      Vector<float> &                      smoothness_indicators,
      const ComponentMask &coefficients_predicate   = ComponentMask(),
      const double         smallest_abs_coefficient = 1e-10,
      const bool           only_flagged_cells       = false);
 
    template <int dim, int spacedim>
    FESeries::Legendre<dim, spacedim>
    default_fe_series(const hp::FECollection<dim, spacedim> &fe_collection);
  } // namespace Legendre
 
 
 
  namespace Fourier
  {
    template <int dim, int spacedim, typename VectorType>
    void
    coefficient_decay(FESeries::Fourier<dim, spacedim> &   fe_fourier,
                      const hp::DoFHandler<dim, spacedim> &dof_handler,
                      const VectorType &                   solution,
                      Vector<float> &             smoothness_indicators,
                      const VectorTools::NormType regression_strategy =
                        VectorTools::Linfty_norm,
                      const double smallest_abs_coefficient = 1e-10,
                      const bool   only_flagged_cells       = false);
 
    template <int dim, int spacedim, typename VectorType>
    void
    coefficient_decay_per_direction(
      FESeries::Fourier<dim, spacedim> &   fe_fourier,
      const hp::DoFHandler<dim, spacedim> &dof_handler,
      const VectorType &                   solution,
      Vector<float> &                      smoothness_indicators,
      const ComponentMask &coefficients_predicate   = ComponentMask(),
      const double         smallest_abs_coefficient = 1e-10,
      const bool           only_flagged_cells       = false);
 
    template <int dim, int spacedim>
    FESeries::Fourier<dim, spacedim>
    default_fe_series(const hp::FECollection<dim, spacedim> &fe_collection);
  } // namespace Fourier
} // namespace SmoothnessEstimator
 
 
DEAL_II_NAMESPACE_CLOSE
 
#endif