Line data    Source code

       1             : // The libMesh Finite Element Library.
       2             : // Copyright (C) 2002-2025 Benjamin S. Kirk, John W. Peterson, Roy H. Stogner
       3             : 
       4             : // This library is free software; you can redistribute it and/or
       5             : // modify it under the terms of the GNU Lesser General Public
       6             : // License as published by the Free Software Foundation; either
       7             : // version 2.1 of the License, or (at your option) any later version.
       8             : 
       9             : // This library is distributed in the hope that it will be useful,
      10             : // but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             : // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             : // Lesser General Public License for more details.
      13             : 
      14             : // You should have received a copy of the GNU Lesser General Public
      15             : // License along with this library; if not, write to the Free Software
      16             : // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
      17             : 
      18             : 
      19             : 
      20             : #ifndef LIBMESH_INTER_MESH_PROJECTION_H
      21             : #define LIBMESH_INTER_MESH_PROJECTION_H
      22             : 
      23             : // Local includes
      24             : #include "libmesh/libmesh.h"
      25             : #include "libmesh/mesh.h"
      26             : #include "libmesh/system.h"
      27             : #include "libmesh/equation_systems.h"
      28             : #include "libmesh/mesh_function.h"
      29             : #include "libmesh/numeric_vector.h"
      30             : #include "libmesh/numeric_vector.h"
      31             : #include "libmesh/fem_function_base.h"
      32             : 
      33             : // C++ includes
      34             : #include <cstddef>
      35             : #include <vector>
      36             : 
      37             : namespace libMesh
      38             : {
      39             : 
      40             : // Forward declarations
      41             : 
      42             : /**
      43             :  * This class implements inter mesh projection, i.e. projection of
      44             :  * vectors defined on a given mesh (from_mesh associated with from_system)
      45             :  * to another mesh (to_mesh of to_system).
      46             :  */
      47             : 
      48             : class InterMeshProjection
      49             : {
      50             : public:
      51             : 
      52             :   // Constructor, specifies the _from_system whose vectors will be
      53             :   // projected onto the _to_mesh
      54             :   InterMeshProjection(System & _from_system, System & _to_mesh);
      55             : 
      56             :   // Projects from_system vectors onto the to_mesh
      57             :   void project_system_vectors();
      58             : 
      59             :   static Number fptr(const Point & p, const Parameters &, const std::string & libmesh_dbg_var(sys_name), const std::string & unknown_name);
      60             : 
      61             :   static Gradient gptr(const Point & p, const Parameters &, const std::string & libmesh_dbg_var(sys_name), const std::string & unknown_name);
      62             : 
      63             : private:
      64             : 
      65             :   // Local copy of the _from_system
      66             :   System & from_system;
      67             : 
      68             :   // Local copy of the _to_system
      69             :   System & to_system;
      70             : 
      71             : };
      72             : 
      73             : // This class provides the functor we will supply to System::project_vector
      74             : // inside InterMeshProjection::project_system_vectors.
      75             : // Object is constructed by passing in a pointer to the mesh function whose
      76             : // gradient we want to shim via operator().
      77             : class GradientMeshFunction : public FunctionBase<Gradient>
      78             : {
      79             : public:
      80             :   // Constructor
      81             :   GradientMeshFunction(const MeshFunction & _mesh_function);
      82             : 
      83             :   // Destructor
      84           0 :   virtual ~GradientMeshFunction () { }
      85             : 
      86           0 :   virtual void init () { }
      87             : 
      88           0 :   virtual std::unique_ptr<FunctionBase<Gradient>> clone () const
      89             :   {
      90           0 :     return std::make_unique<GradientMeshFunction>(*mesh_function);
      91             :   }
      92             : 
      93           0 :   virtual Gradient operator() (const Point & , const Real)
      94           0 :   { libmesh_not_implemented(); }
      95             : 
      96             :   virtual void operator() (const Point & p, const Real, DenseVector<Gradient> & output);
      97             : 
      98             : private:
      99             : 
     100             :   // Local copy of the passed in mesh function.
     101             :   std::unique_ptr<MeshFunction> mesh_function;
     102             : 
     103             : };
     104             : }
     105             : 
     106             : #endif // LIBMESH_INTER_MESH_PROJECTION_H