Line data    Source code

       1           0 : // Distributed under the MIT License.
       2             : // See LICENSE.txt for details.
       3             : 
       4             : #pragma once
       5             : 
       6             : #include <cstddef>
       7             : #include <utility>
       8             : 
       9             : /// \cond
      10             : class Matrix;
      11             : template <size_t>
      12             : class Mesh;
      13             : namespace Spectral {
      14             : enum class Basis : uint8_t;
      15             : enum class Quadrature : uint8_t;
      16             : }  // namespace Spectral
      17             : /// \endcond
      18             : 
      19             : namespace Spectral {
      20             : /// @{
      21             : /*!
      22             :  * \brief Matrices that interpolate to the lower and upper boundaries of the
      23             :  * element.
      24             :  *
      25             :  * Assumes that the logical coordinates are \f$[-1, 1]\f$. The first element of
      26             :  * the pair interpolates to \f$\xi=-1\f$ and the second to \f$\xi=1\f$. These
      27             :  * are just the Lagrange interpolating polynomials evaluated at \f$\xi=\pm1\f$.
      28             :  * For Gauss-Lobatto points the only non-zero element is at the boundaries
      29             :  * and is one and so is not implemented.
      30             :  *
      31             :  * \warning This can only be called with Gauss points.
      32             :  */
      33           1 : const std::pair<Matrix, Matrix>& boundary_interpolation_matrices(
      34             :     const Mesh<1>& mesh);
      35             : 
      36             : template <Basis BasisType, Quadrature QuadratureType>
      37           1 : const std::pair<Matrix, Matrix>& boundary_interpolation_matrices(
      38             :     size_t num_points);
      39             : /// @}
      40             : }  // namespace Spectral