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/ChildSize.hpp"
      13             : #include "Domain/Structure/Element.hpp"
      14             : #include "Domain/Structure/ElementId.hpp"
      15             : #include "Domain/Tags.hpp"
      16             : #include "NumericalAlgorithms/Spectral/Mesh.hpp"
      17             : #include "NumericalAlgorithms/Spectral/Projection.hpp"
      18             : #include "NumericalAlgorithms/Spectral/SegmentSize.hpp"
      19             : #include "ParallelAlgorithms/Amr/Protocols/Projector.hpp"
      20             : #include "Utilities/Gsl.hpp"
      21             : #include "Utilities/TMPL.hpp"
      22             : #include "Utilities/TaggedTuple.hpp"
      23             : 
      24             : namespace amr::projectors {
      25             : 
      26             : /// \brief Update the Variables corresponding to VariablesTags after an AMR
      27             : /// change
      28             : ///
      29             : /// There is a specialization for
      30             : /// `ProjectVariables<tmpl::list<VariablesTags...>>` that can be used if a
      31             : /// `tmpl::list` is available.
      32             : ///
      33             : /// \details For each item corresponding to each tag in VariablesTags, project
      34             : /// the data for each variable from the old mesh to the new mesh
      35             : ///
      36             : /// \see ProjectTensors
      37             : template <size_t Dim, typename... VariablesTags>
      38           1 : struct ProjectVariables : tt::ConformsTo<amr::protocols::Projector> {
      39           0 :   using return_tags = tmpl::list<VariablesTags...>;
      40           0 :   using argument_tags =
      41             :       tmpl::list<domain::Tags::Element<Dim>, domain::Tags::Mesh<Dim>>;
      42             : 
      43             :   // p-refinement
      44           0 :   static void apply(
      45             :       const gsl::not_null<typename VariablesTags::type*>... vars,
      46             :       const Element<Dim>& /*element*/, const Mesh<Dim>& new_mesh,
      47             :       const std::pair<Mesh<Dim>, Element<Dim>>& old_mesh_and_element) {
      48             :     const auto& old_mesh = old_mesh_and_element.first;
      49             :     if (old_mesh == new_mesh) {
      50             :       return;  // mesh was not refined, so no projection needed
      51             :     }
      52             :     const auto projection_matrices =
      53             :         Spectral::p_projection_matrices(old_mesh, new_mesh);
      54             :     const auto& old_extents = old_mesh.extents();
      55             :     expand_pack(
      56             :         (*vars = apply_matrices(projection_matrices, *vars, old_extents))...);
      57             :   }
      58             : 
      59             :   // h-refinement
      60             :   template <typename... Tags>
      61           0 :   static void apply(const gsl::not_null<typename VariablesTags::type*>... vars,
      62             :                     const Element<Dim>& element, const Mesh<Dim>& new_mesh,
      63             :                     const tuples::TaggedTuple<Tags...>& parent_items) {
      64             :     const auto& element_id = element.id();
      65             :     const auto& parent_id = get<domain::Tags::Element<Dim>>(parent_items).id();
      66             :     const auto& parent_mesh = get<domain::Tags::Mesh<Dim>>(parent_items);
      67             :     const auto child_sizes =
      68             :         domain::child_size(element_id.segment_ids(), parent_id.segment_ids());
      69             :     const auto projection_matrices =
      70             :         Spectral::projection_matrix_parent_to_child(parent_mesh, new_mesh,
      71             :                                                     child_sizes);
      72             :     expand_pack((*vars = apply_matrices(projection_matrices,
      73             :                                         get<VariablesTags>(parent_items),
      74             :                                         parent_mesh.extents()))...);
      75             :   }
      76             : 
      77             :   // h-coarsening
      78             :   template <typename... Tags>
      79           0 :   static void apply(
      80             :       const gsl::not_null<typename VariablesTags::type*>... vars,
      81             :       const Element<Dim>& element, const Mesh<Dim>& new_mesh,
      82             :       const std::unordered_map<ElementId<Dim>, tuples::TaggedTuple<Tags...>>&
      83             :           children_items) {
      84             :     const auto& element_id = element.id();
      85             :     bool first_child = true;
      86             :     for (const auto& [child_id, child_items] : children_items) {
      87             :       const auto& child_mesh = get<domain::Tags::Mesh<Dim>>(child_items);
      88             :       const auto child_sizes =
      89             :           domain::child_size(child_id.segment_ids(), element_id.segment_ids());
      90             :       const auto projection_matrices =
      91             :           Spectral::projection_matrix_child_to_parent(child_mesh, new_mesh,
      92             :                                                       child_sizes);
      93             :       if (first_child) {
      94             :         expand_pack((*vars = apply_matrices(projection_matrices,
      95             :                                             get<VariablesTags>(child_items),
      96             :                                             child_mesh.extents()))...);
      97             :         first_child = false;
      98             :       } else {
      99             :         expand_pack((*vars += apply_matrices(projection_matrices,
     100             :                                              get<VariablesTags>(child_items),
     101             :                                              child_mesh.extents()))...);
     102             :       }
     103             :     }
     104             :   }
     105             : };
     106             : 
     107             : /// \cond
     108             : template <size_t Dim, typename... VariableTags>
     109             : struct ProjectVariables<Dim, tmpl::list<VariableTags...>>
     110             :     : public ProjectVariables<Dim, VariableTags...> {};
     111             : /// \endcond
     112             : }  // namespace amr::projectors