eim_classes.h

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#ifndef EIM_CLASSES_H
#define EIM_CLASSES_H
 
// libMesh includes
#include "libmesh/rb_eim_construction.h"
#include "libmesh/rb_eim_evaluation.h"
#include "libmesh/auto_ptr.h" // libmesh_make_unique
 
// Example includes
#include "assembly.h"
 
// Bring in bits from the libMesh namespace.
// Just the bits we're using, since this is a header.
using libMesh::EquationSystems;
using libMesh::RBEIMEvaluation;
#ifndef LIBMESH_HAVE_CXX14_MAKE_UNIQUE
using libMesh::make_unique;
#endif
 
// A simple subclass of RBEIMEvaluation. Overload
// evaluate_parametrized_function to define the
// function that we "empirically" interpolate.
class SimpleEIMEvaluation : public RBEIMEvaluation
{
public:
 
  SimpleEIMEvaluation(const libMesh::Parallel::Communicator & comm) :
    RBEIMEvaluation(comm)
  {
    attach_parametrized_function(&sg);
  }
 
  ShiftedGaussian sg;
};
 
// A simple subclass of RBEIMConstruction.
class SimpleEIMConstruction : public RBEIMConstruction
{
public:
 
  SimpleEIMConstruction (EquationSystems & es,
                         const std::string & name_in,
                         const unsigned int number_in)
    : Parent(es, name_in, number_in)
  {
  }
 
  typedef RBEIMConstruction Parent;
 
  virtual std::unique_ptr<ElemAssembly> build_eim_assembly(unsigned int index)
  {
    return libmesh_make_unique<EIM_F>(*this, index);
  }
 
  virtual void init_data()
  {
    Parent::init_data();
 
    set_inner_product_assembly(ip);
  }
 
  virtual void init_implicit_system()
  {
    this->add_variable ("L2_proj_var", libMesh::FIRST);
  }
 
  virtual void init_explicit_system()
  {
    u_var = get_explicit_system().add_variable ("f_EIM", libMesh::FIRST);
  }
 
  unsigned int u_var;
 
  EIM_IP_assembly ip;
};
 
#endif