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 "ParallelAlgorithms/Amr/Protocols/Projector.hpp"
      19             : #include "Utilities/Gsl.hpp"
      20             : #include "Utilities/TMPL.hpp"
      21             : #include "Utilities/TaggedTuple.hpp"
      22             : 
      23             : namespace amr::projectors {
      24             : 
      25             : /// \brief Update the Tensors corresponding to TensorTags after an AMR
      26             : /// change
      27             : ///
      28             : /// There is a specialization for
      29             : /// `ProjectTensors<tmpl::list<TensorTags...>>` that can be used if a
      30             : /// `tmpl::list` is available.
      31             : ///
      32             : /// \details For each item corresponding to each tag in TensorTags, project
      33             : /// the data for each tensor from the old mesh to the new mesh
      34             : ///
      35             : /// \see ProjectVariables
      36             : template <size_t Dim, typename... TensorTags>
      37           1 : struct ProjectTensors : tt::ConformsTo<amr::protocols::Projector> {
      38           0 :   using return_tags = tmpl::list<TensorTags...>;
      39           0 :   using argument_tags =
      40             :       tmpl::list<domain::Tags::Element<Dim>, domain::Tags::Mesh<Dim>>;
      41             : 
      42           0 :   static void apply(
      43             :       const gsl::not_null<typename TensorTags::type*>... tensors,
      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             :     const auto project_tensor = [&projection_matrices,
      54             :                                  old_extents](auto& tensor) {
      55             :       for (size_t i = 0; i < tensor.size(); ++i) {
      56             :         tensor[i] = apply_matrices(projection_matrices, tensor[i], old_extents);
      57             :       }
      58             :     };
      59             :     EXPAND_PACK_LEFT_TO_RIGHT(project_tensor(*tensors));
      60             :   }
      61             : 
      62             :   template <typename... Tags>
      63           0 :   static void apply(const gsl::not_null<typename TensorTags::type*>... tensors,
      64             :                     const Element<Dim>& element, const Mesh<Dim>& new_mesh,
      65             :                     const tuples::TaggedTuple<Tags...>& parent_items) {
      66             :     const auto& element_id = element.id();
      67             :     const auto& parent_id = get<domain::Tags::Element<Dim>>(parent_items).id();
      68             :     const auto& parent_mesh = get<domain::Tags::Mesh<Dim>>(parent_items);
      69             :     const auto child_sizes =
      70             :         domain::child_size(element_id.segment_ids(), parent_id.segment_ids());
      71             :     const auto projection_matrices =
      72             :         Spectral::projection_matrix_parent_to_child(parent_mesh, new_mesh,
      73             :                                                     child_sizes);
      74             :     const auto project_tensor = [&](auto& new_tensor, const auto& old_tensor) {
      75             :       for (size_t i = 0; i < new_tensor.size(); ++i) {
      76             :         new_tensor[i] = apply_matrices(projection_matrices, old_tensor[i],
      77             :                                        parent_mesh.extents());
      78             :       }
      79             :       return 0;
      80             :     };
      81             :     expand_pack(project_tensor(*tensors, get<TensorTags>(parent_items))...);
      82             :   }
      83             : 
      84             :   template <typename... Tags>
      85           0 :   static void apply(
      86             :       const gsl::not_null<typename TensorTags::type*>... tensors,
      87             :       const Element<Dim>& element, const Mesh<Dim>& new_mesh,
      88             :       const std::unordered_map<ElementId<Dim>, tuples::TaggedTuple<Tags...>>&
      89             :           children_items) {
      90             :     const auto& element_id = element.id();
      91             :     bool first_child = true;
      92             :     for (const auto& [child_id, child_items] : children_items) {
      93             :       const auto& child_mesh = get<domain::Tags::Mesh<Dim>>(child_items);
      94             :       const auto child_sizes =
      95             :           domain::child_size(child_id.segment_ids(), element_id.segment_ids());
      96             :       const auto projection_matrices =
      97             :           Spectral::projection_matrix_child_to_parent(child_mesh, new_mesh,
      98             :                                                       child_sizes);
      99             :       if (first_child) {
     100             :         const auto project_tensor = [&](auto& new_tensor,
     101             :                                         const auto& old_tensor) {
     102             :           for (size_t i = 0; i < new_tensor.size(); ++i) {
     103             :             new_tensor[i] = apply_matrices(projection_matrices, old_tensor[i],
     104             :                                            child_mesh.extents());
     105             :           }
     106             :           return 0;
     107             :         };
     108             :         expand_pack(project_tensor(*tensors, get<TensorTags>(child_items))...);
     109             :         first_child = false;
     110             :       } else {
     111             :         const auto project_tensor = [&](auto& new_tensor,
     112             :                                         const auto& old_tensor) {
     113             :           for (size_t i = 0; i < new_tensor.size(); ++i) {
     114             :             new_tensor[i] += apply_matrices(projection_matrices, old_tensor[i],
     115             :                                             child_mesh.extents());
     116             :           }
     117             :           return 0;
     118             :         };
     119             :         expand_pack(project_tensor(*tensors, get<TensorTags>(child_items))...);
     120             :       }
     121             :     }
     122             :   }
     123             : };
     124             : 
     125             : /// \cond
     126             : template <size_t Dim, typename... TensorTags>
     127             : struct ProjectTensors<Dim, tmpl::list<TensorTags...>>
     128             :     : public ProjectTensors<Dim, TensorTags...> {};
     129             : /// \endcond
     130             : }  // namespace amr::projectors