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 <unordered_map>
       8             : #include <utility>
       9             : 
      10             : #include "DataStructures/ApplyMatrices.hpp"
      11             : #include "DataStructures/Variables.hpp"
      12             : #include "Domain/Structure/Element.hpp"
      13             : #include "Domain/Structure/ElementId.hpp"
      14             : #include "Domain/Tags.hpp"
      15             : #include "NumericalAlgorithms/Spectral/Mesh.hpp"
      16             : #include "NumericalAlgorithms/Spectral/Projection.hpp"
      17             : #include "ParallelAlgorithms/Amr/Protocols/Projector.hpp"
      18             : #include "Utilities/Gsl.hpp"
      19             : #include "Utilities/TMPL.hpp"
      20             : #include "Utilities/TaggedTuple.hpp"
      21             : 
      22             : namespace amr::projectors {
      23             : 
      24             : /// \brief Update the Variables corresponding to VariablesTags after an AMR
      25             : /// change
      26             : ///
      27             : /// There is a specialization for
      28             : /// `ProjectVariables<tmpl::list<VariablesTags...>>` that can be used if a
      29             : /// `tmpl::list` is available.
      30             : ///
      31             : /// \details For each item corresponding to each tag in VariablesTags, project
      32             : /// the data for each variable from the old mesh to the new mesh
      33             : ///
      34             : /// \see ProjectTensors
      35             : template <size_t Dim, typename... VariablesTags>
      36           1 : struct ProjectVariables : tt::ConformsTo<amr::protocols::Projector> {
      37           0 :   using return_tags = tmpl::list<VariablesTags...>;
      38           0 :   using argument_tags =
      39             :       tmpl::list<domain::Tags::Element<Dim>, domain::Tags::Mesh<Dim>>;
      40             : 
      41             :   // p-refinement
      42           0 :   static void apply(
      43             :       const gsl::not_null<typename VariablesTags::type*>... vars,
      44             :       const Element<Dim>& /*element*/, const Mesh<Dim>& new_mesh,
      45             :       const std::pair<Mesh<Dim>, Element<Dim>>& old_mesh_and_element) {
      46             :     const auto& old_mesh = old_mesh_and_element.first;
      47             :     if (old_mesh == new_mesh) {
      48             :       return;  // mesh was not refined, so no projection needed
      49             :     }
      50             :     const auto projection_matrices =
      51             :         Spectral::p_projection_matrices(old_mesh, new_mesh);
      52             :     const auto& old_extents = old_mesh.extents();
      53             :     expand_pack(
      54             :         (*vars = apply_matrices(projection_matrices, *vars, old_extents))...);
      55             :   }
      56             : 
      57             :   // h-refinement
      58             :   template <typename... Tags>
      59           0 :   static void apply(const gsl::not_null<typename VariablesTags::type*>... vars,
      60             :                     const Element<Dim>& element, const Mesh<Dim>& child_mesh,
      61             :                     const tuples::TaggedTuple<Tags...>& parent_items) {
      62             :     const auto& element_id = element.id();
      63             :     const auto& parent_id = get<domain::Tags::Element<Dim>>(parent_items).id();
      64             :     const auto& parent_mesh = get<domain::Tags::Mesh<Dim>>(parent_items);
      65             :     std::array<Spectral::ChildSize, Dim> child_sizes{Spectral::ChildSize::Full};
      66             :     for (size_t d = 0; d < Dim; ++d) {
      67             :       if (parent_id.segment_id(d) == element_id.segment_id(d)) {
      68             :         continue;
      69             :       } else if (parent_id.segment_id(d).id_of_child(Side::Lower) ==
      70             :                  element_id.segment_id(d)) {
      71             :         gsl::at(child_sizes, d) = Spectral::ChildSize::LowerHalf;
      72             :       } else if (parent_id.segment_id(d).id_of_child(Side::Upper) ==
      73             :                  element_id.segment_id(d)) {
      74             :         gsl::at(child_sizes, d) = Spectral::ChildSize::UpperHalf;
      75             :       } else {
      76             :         ERROR("Parent element " << parent_id << " is not a parent of element "
      77             :                                 << element_id << ". Please report this bug.");
      78             :       }
      79             :     }
      80             :     const auto prolongation_matrices =
      81             :         Spectral::projection_matrix_parent_to_child(parent_mesh, child_mesh,
      82             :                                                     child_sizes);
      83             :     expand_pack((*vars = apply_matrices(prolongation_matrices,
      84             :                                         get<VariablesTags>(parent_items),
      85             :                                         parent_mesh.extents()))...);
      86             :   }
      87             : 
      88             :   // h-coarsening
      89             :   template <typename... Tags>
      90           0 :   static void apply(
      91             :       const gsl::not_null<typename VariablesTags::type*>... /*vars*/,
      92             :       const Element<Dim>& /*element*/, const Mesh<Dim>& /*new_mesh*/,
      93             :       const std::unordered_map<ElementId<Dim>, tuples::TaggedTuple<Tags...>>&
      94             :       /*children_items*/) {
      95             :     ERROR("h-coarsening not implemented yet");
      96             :   }
      97             : };
      98             : 
      99             : /// \cond
     100             : template <size_t Dim, typename... VariableTags>
     101             : struct ProjectVariables<Dim, tmpl::list<VariableTags...>>
     102             :     : public ProjectVariables<Dim, VariableTags...> {};
     103             : /// \endcond
     104             : }  // namespace amr::projectors