fe_q_dg0.h

// ---------------------------------------------------------------------
//
// Copyright (C) 2012 - 2015 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 at
// the top level of the deal.II distribution.
//
// ---------------------------------------------------------------------


#ifndef dealii__fe_q_dg0_h
#define dealii__fe_q_dg0_h

#include <deal.II/base/config.h>
#include <deal.II/base/tensor_product_polynomials_const.h>
#include <deal.II/fe/fe_q_base.h>

DEAL_II_NAMESPACE_OPEN



template <int dim, int spacedim=dim>
class FE_Q_DG0 : public FE_Q_Base<TensorProductPolynomialsConst<dim>,dim,spacedim>
{
public:
  FE_Q_DG0 (const unsigned int p);

  FE_Q_DG0 (const Quadrature<1> &points);

  virtual std::string get_name () const;

  virtual void interpolate(std::vector<double>       &local_dofs,
                           const std::vector<double> &values) const;

  virtual void interpolate(std::vector<double>                &local_dofs,
                           const std::vector<Vector<double> > &values,
                           unsigned int offset = 0) const;

  virtual void interpolate(
    std::vector<double>          &local_dofs,
    const VectorSlice<const std::vector<std::vector<double> > > &values) const;

  virtual void
  get_interpolation_matrix (const FiniteElement<dim,spacedim> &source,
                            FullMatrix<double>       &matrix) const;


  virtual bool has_support_on_face (const unsigned int shape_index,
                                    const unsigned int face_index) const;

  virtual std::pair<Table<2,bool>, std::vector<unsigned int> >
  get_constant_modes () const;

protected:
  virtual FiniteElement<dim,spacedim> *clone() const;

private:

  static std::vector<bool> get_riaf_vector(const unsigned int degree);

  static std::vector<unsigned int> get_dpo_vector(const unsigned int degree);
};



DEAL_II_NAMESPACE_CLOSE

#endif