Line data    Source code

       1             : //* This file is part of the MOOSE framework
       2             : //* https://mooseframework.inl.gov
       3             : //*
       4             : //* All rights reserved, see COPYRIGHT for full restrictions
       5             : //* https://github.com/idaholab/moose/blob/master/COPYRIGHT
       6             : //*
       7             : //* Licensed under LGPL 2.1, please see LICENSE for details
       8             : //* https://www.gnu.org/licenses/lgpl-2.1.html
       9             : 
      10             : #ifdef MOOSE_MFEM_ENABLED
      11             : 
      12             : #pragma once
      13             : #include "FileMesh.h"
      14             : #include "libmesh/ignore_warnings.h"
      15             : #include <mfem.hpp>
      16             : #include "libmesh/restore_warnings.h"
      17             : 
      18             : /**
      19             :  * MFEMMesh inherits a MOOSE mesh class which allows us to work with
      20             :  * other MOOSE objects. It contains a pointer to the parallel MFEM mesh.
      21             :  */
      22             : class MFEMMesh : public FileMesh
      23             : {
      24             : public:
      25             :   static InputParameters validParams();
      26             : 
      27             :   MFEMMesh(const InputParameters & parameters);
      28             : 
      29             :   virtual ~MFEMMesh();
      30             : 
      31             :   /**
      32             :    * Accessors for the _mfem_par_mesh object. If the mesh has
      33             :    * not been build, the methods will call the appropriate protected methods to
      34             :    * build them.
      35             :    */
      36        3254 :   mfem::ParMesh & getMFEMParMesh() { return *_mfem_par_mesh; }
      37             :   const mfem::ParMesh & getMFEMParMesh() const;
      38             : 
      39             :   /**
      40             :    * Copy a shared_ptr to the mfem::ParMesh object.
      41             :    */
      42        1637 :   std::shared_ptr<mfem::ParMesh> getMFEMParMeshPtr() { return _mfem_par_mesh; }
      43             : 
      44             :   /**
      45             :    * Build MFEM ParMesh and a placeholder MOOSE mesh.
      46             :    */
      47             :   void buildMesh() override;
      48             : 
      49             :   /**
      50             :    * Clones the mesh.
      51             :    */
      52             :   std::unique_ptr<MooseMesh> safeClone() const override;
      53             : 
      54             :   /**
      55             :    * Returns true if mesh displacement is required.
      56             :    */
      57         877 :   bool shouldDisplace() const { return _mesh_displacement_variable.has_value(); }
      58             : 
      59             :   /**
      60             :    * Returns an optional reference to displacement variable name.
      61             :    */
      62         362 :   std::optional<std::reference_wrapper<std::string const>> getMeshDisplacementVariable() const
      63             :   {
      64         362 :     return _mesh_displacement_variable;
      65             :   }
      66             : 
      67             :   /**
      68             :    * Displace the nodes of the mesh by the given displacement.
      69             :    * Does not update FE spaces for variables.
      70             :    */
      71             :   void displace(mfem::GridFunction const & displacement);
      72             : 
      73         349 :   bool isDistributedMesh() const override { return true; }
      74        1397 :   unsigned int dimension() const override { return _mfem_par_mesh->Dimension(); }
      75         349 :   unsigned int spatialDimension() const override { return _mfem_par_mesh->SpaceDimension(); }
      76         349 :   SubdomainID nSubdomains() const override { return _mfem_par_mesh->attributes.Size(); }
      77         349 :   dof_id_type nActiveElem() const override { return _mfem_par_mesh->GetGlobalNE(); }
      78          68 :   dof_id_type nActiveLocalElem() const override { return _mfem_par_mesh->GetNE(); }
      79             : 
      80             : private:
      81             :   /**
      82             :    * Builds a placeholder mesh when no MOOSE mesh is required.
      83             :    */
      84             :   void buildDummyMooseMesh();
      85             : 
      86             :   /**
      87             :    * Performs a uniform refinement on the chosen mesh nref times.
      88             :    */
      89             :   void uniformRefinement(mfem::Mesh & mesh, const unsigned int nref) const;
      90             : 
      91             :   /**
      92             :    * Holds name of variable used for mesh displacement, if set.
      93             :    */
      94             :   std::optional<std::string> _mesh_displacement_variable;
      95             : 
      96             :   /**
      97             :    * Smart pointers to mfem::ParMesh object. Do not access directly.
      98             :    * Use the accessors instead.
      99             :    */
     100             :   std::shared_ptr<mfem::ParMesh> _mfem_par_mesh{nullptr};
     101             : };
     102             : 
     103             : inline const mfem::ParMesh &
     104         715 : MFEMMesh::getMFEMParMesh() const
     105             : {
     106         715 :   return const_cast<MFEMMesh *>(this)->getMFEMParMesh();
     107             : }
     108             : 
     109             : #endif