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