Line data    Source code

       1            0 : // Distributed under the MIT License.
       2              : // See LICENSE.txt for details.
       3              : 
       4              : #pragma once
       5              : 
       6              : #include <array>
       7              : #include <cstddef>
       8              : #include <unordered_map>
       9              : #include <utility>
      10              : 
      11              : #include "DataStructures/DataVector.hpp"
      12              : #include "DataStructures/TaggedTuple.hpp"
      13              : #include "DataStructures/Variables.hpp"
      14              : #include "Domain/Structure/ChildSize.hpp"
      15              : #include "Domain/Structure/Element.hpp"
      16              : #include "Domain/Structure/ElementId.hpp"
      17              : #include "Domain/Tags.hpp"
      18              : #include "NumericalAlgorithms/Spectral/Mesh.hpp"
      19              : #include "NumericalAlgorithms/Spectral/Projection.hpp"
      20              : #include "NumericalAlgorithms/Spectral/SegmentSize.hpp"
      21              : #include "ParallelAlgorithms/Amr/Protocols/Projector.hpp"
      22              : #include "Utilities/Gsl.hpp"
      23              : #include "Utilities/MakeArray.hpp"
      24              : #include "Utilities/TMPL.hpp"
      25              : 
      26              : namespace amr::projectors {
      27              : 
      28              : /// \brief Update the Tensors corresponding to TensorTags after an AMR
      29              : /// change
      30              : ///
      31              : /// There is a specialization for
      32              : /// `ProjectTensors<tmpl::list<TensorTags...>>` that can be used if a
      33              : /// `tmpl::list` is available.
      34              : ///
      35              : /// \details For each item corresponding to each tag in TensorTags, project
      36              : /// the data for each tensor from the old mesh to the new mesh
      37              : ///
      38              : /// \see ProjectVariables
      39              : template <size_t Dim, typename... TensorTags>
      40            1 : struct ProjectTensors : tt::ConformsTo<amr::protocols::Projector> {
      41            0 :   using return_tags = tmpl::list<TensorTags...>;
      42            0 :   using argument_tags =
      43              :       tmpl::list<domain::Tags::Element<Dim>, domain::Tags::Mesh<Dim>>;
      44              : 
      45            0 :   static void apply(
      46              :       const gsl::not_null<typename TensorTags::type*>... tensors,
      47              :       const Element<Dim>& /*element*/, const Mesh<Dim>& new_mesh,
      48              :       const std::pair<Mesh<Dim>, Element<Dim>>& old_mesh_and_element) {
      49              :     const auto& old_mesh = old_mesh_and_element.first;
      50              :     if (old_mesh == new_mesh) {
      51              :       return;  // mesh was not refined, so no projection needed
      52              :     }
      53              :     const auto project_tensor = [&old_mesh, &new_mesh](auto& tensor) {
      54              :       for (size_t i = 0; i < tensor.size(); ++i) {
      55              :         tensor[i] =
      56              :             Spectral::project(tensor[i], old_mesh, new_mesh,
      57              :                               make_array<Dim>(Spectral::SegmentSize::Full),
      58              :                               make_array<Dim>(Spectral::SegmentSize::Full));
      59              :       }
      60              :     };
      61              :     EXPAND_PACK_LEFT_TO_RIGHT(project_tensor(*tensors));
      62              :   }
      63              : 
      64              :   template <typename... Tags>
      65            0 :   static void apply(const gsl::not_null<typename TensorTags::type*>... tensors,
      66              :                     const Element<Dim>& element, const Mesh<Dim>& new_mesh,
      67              :                     const tuples::TaggedTuple<Tags...>& parent_items) {
      68              :     const auto& element_id = element.id();
      69              :     const auto& parent_id = get<domain::Tags::Element<Dim>>(parent_items).id();
      70              :     const auto& parent_mesh = get<domain::Tags::Mesh<Dim>>(parent_items);
      71              :     const auto child_sizes =
      72              :         domain::child_size(element_id.segment_ids(), parent_id.segment_ids());
      73              :     const auto project_tensor = [&](auto& new_tensor, const auto& old_tensor) {
      74              :       for (size_t i = 0; i < new_tensor.size(); ++i) {
      75              :         Spectral::project(
      76              :             make_not_null(&new_tensor[i]), old_tensor[i], parent_mesh, new_mesh,
      77              :             make_array<Dim>(Spectral::SegmentSize::Full), child_sizes);
      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              :       if (first_child) {
      97              :         const auto project_tensor = [&](auto& new_tensor,
      98              :                                         const auto& old_tensor) {
      99              :           for (size_t i = 0; i < new_tensor.size(); ++i) {
     100              :             Spectral::project(make_not_null(&new_tensor[i]), old_tensor[i],
     101              :                               child_mesh, new_mesh, child_sizes,
     102              :                               make_array<Dim>(Spectral::SegmentSize::Full));
     103              :           }
     104              :           return 0;
     105              :         };
     106              :         expand_pack(project_tensor(*tensors, get<TensorTags>(child_items))...);
     107              :         first_child = false;
     108              :       } else {
     109              :         const auto project_tensor = [&](auto& new_tensor,
     110              :                                         const auto& old_tensor) {
     111              :           for (size_t i = 0; i < new_tensor.size(); ++i) {
     112              :             new_tensor[i] += Spectral::project(
     113              :                 old_tensor[i], child_mesh, new_mesh, child_sizes,
     114              :                 make_array<Dim>(Spectral::SegmentSize::Full));
     115              :           }
     116              :           return 0;
     117              :         };
     118              :         expand_pack(project_tensor(*tensors, get<TensorTags>(child_items))...);
     119              :       }
     120              :     }
     121              :   }
     122              : };
     123              : 
     124              : /// \cond
     125              : template <size_t Dim, typename... TensorTags>
     126              : struct ProjectTensors<Dim, tmpl::list<TensorTags...>>
     127              :     : public ProjectTensors<Dim, TensorTags...> {};
     128              : /// \endcond
     129              : }  // namespace amr::projectors