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 <limits>
       8             : 
       9             : #include "NumericalAlgorithms/Spectral/Basis.hpp"
      10             : #include "NumericalAlgorithms/Spectral/Quadrature.hpp"
      11             : 
      12             : namespace Spectral {
      13             : namespace detail {
      14             : constexpr size_t minimum_number_of_points(const Basis /*basis*/,
      15             :                                           const Quadrature quadrature) {
      16             :   // NOLINTNEXTLINE(bugprone-branch-clone)
      17             :   if (quadrature == Quadrature::Gauss) {
      18             :     return 1;
      19             :     // NOLINTNEXTLINE(bugprone-branch-clone)
      20             :   } else if (quadrature == Quadrature::GaussLobatto) {
      21             :     return 2;
      22             :     // NOLINTNEXTLINE(bugprone-branch-clone)
      23             :   } else if (quadrature == Quadrature::CellCentered) {
      24             :     return 1;
      25             :     // NOLINTNEXTLINE(bugprone-branch-clone)
      26             :   } else if (quadrature == Quadrature::FaceCentered) {
      27             :     return 2;
      28             :     // NOLINTNEXTLINE(bugprone-branch-clone)
      29             :   } else if (quadrature == Quadrature::Equiangular) {
      30             :     return 1;
      31             :     // NOLINTNEXTLINE(bugprone-branch-clone)
      32             :   } else if (quadrature == Quadrature::AxialSymmetry) {
      33             :     return 1;
      34             :   } else if (quadrature == Quadrature::SphericalSymmetry) {
      35             :     return 1;
      36             :   }
      37             :   return std::numeric_limits<size_t>::max();
      38             : }
      39             : }  // namespace detail
      40             : 
      41             : /*!
      42             :  * \brief Minimum number of possible collocation points for a quadrature type.
      43             :  *
      44             :  * \details Since Gauss-Lobatto quadrature has points on the domain boundaries
      45             :  * it must have at least two collocation points. Gauss quadrature can have only
      46             :  * one collocation point.
      47             :  *
      48             :  * \details For `CellCentered` the minimum number of points is 1, while for
      49             :  * `FaceCentered` it is 2.
      50             :  */
      51             : template <Basis basis, Quadrature quadrature>
      52           1 : constexpr size_t minimum_number_of_points =
      53             :     detail::minimum_number_of_points(basis, quadrature);
      54             : }  // namespace Spectral