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 <utility>
       8              : 
       9              : /// \cond
      10              : template <size_t VolumeDim>
      11              : class DirectionalId;
      12              : namespace db {
      13              : class Access;
      14              : }  // namespace db
      15              : namespace evolution::dg {
      16              : template <size_t Dim>
      17              : struct BoundaryData;
      18              : }  // namespace evolution::dg
      19              : namespace gsl {
      20              : template <class T>
      21              : class not_null;
      22              : }  // namespace gsl
      23              : /// \endcond
      24              : 
      25              : namespace evolution::dg::subcell {
      26              : /*!
      27              :  * \brief Copies the subcell data received from a neighbor into the DataBox.
      28              :  *
      29              :  * This is invoked by elements doing DG for every neighbor across a mortar
      30              :  * without local time stepping, whether or not the element or the neighbor can
      31              :  * use subcell. Elements whose mesh does not support subcell store nothing.
      32              :  *
      33              :  * The mesh and data needed for reconstruction are copied over into
      34              :  * `subcell::Tags::MeshForGhostData` and
      35              :  * `subcell::Tags::GhostDataForReconstruction`.
      36              :  * Additionally, the max/min of the evolved variables from neighboring elements
      37              :  * that is used for the relaxed discrete maximum principle troubled-cell
      38              :  * indicator is combined with the data from the local element and stored in
      39              :  * `subcell::Tags::DataForRdmpTci`. We handle the RDMP
      40              :  * data now because it is sent in the same buffer as the data for
      41              :  * reconstruction.
      42              :  *
      43              :  * Neighbors don't send this data to elements that can never use subcell, i.e.
      44              :  * that are in or border a DG-only block (see
      45              :  * `evolution::dg::subcell::prepare_neighbor_data`), so for those elements a
      46              :  * message without ghost data is ignored. It is an error for any other element.
      47              :  */
      48              : template <size_t VolumeDim>
      49            1 : void receive_subcell_data_for_dg(
      50              :     gsl::not_null<db::Access*> box, const DirectionalId<VolumeDim>& mortar_id,
      51              :     const evolution::dg::BoundaryData<VolumeDim>& received_mortar_data);
      52              : }  // namespace evolution::dg::subcell