dim_dim_user_data.h

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/*
 * Copyright (c) 2015:  G-CSC, Goethe University Frankfurt
 * Author: Dmitry Logashenko
 * 
 * This file is part of UG4.
 * 
 * UG4 is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License version 3 (as published by the
 * Free Software Foundation) with the following additional attribution
 * requirements (according to LGPL/GPL v3 §7):
 * 
 * (1) The following notice must be displayed in the Appropriate Legal Notices
 * of covered and combined works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (2) The following notice must be displayed at a prominent place in the
 * terminal output of covered works: "Based on UG4 (www.ug4.org/license)".
 * 
 * (3) The following bibliography is recommended for citation and must be
 * preserved in all covered files:
 * "Reiter, S., Vogel, A., Heppner, I., Rupp, M., and Wittum, G. A massively
 *   parallel geometric multigrid solver on hierarchically distributed grids.
 *   Computing and visualization in science 16, 4 (2013), 151-164"
 * "Vogel, A., Reiter, S., Rupp, M., Nägel, A., and Wittum, G. UG4 -- a novel
 *   flexible software system for simulating pde based models on high performance
 *   computers. Computing and visualization in science 16, 4 (2013), 165-179"
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 */
 
/*
 * Classes for user data that compute normals or project vectors to low-dimensional
 * subsets. Note that these classes are mainly implemented for visualization purposes
 * and cannot be used for coupling.
 */
#ifndef __H__UG__LIB_DISC__SPATIAL_DISC__USER_DATA__ONC_USER_DATA__
#define __H__UG__LIB_DISC__SPATIAL_DISC__USER_DATA__ONC_USER_DATA__
 
#include <vector>
 
// ug4 headers
#include "common/common.h"
#include "common/math/ugmath.h"
#include "lib_grid/grid_objects/grid_dim_traits.h"
#include "lib_disc/domain_traits.h"
#include "lib_disc/domain_util.h"
#include "lib_disc/reference_element/reference_mapping_provider.h"
#include "lib_disc/spatial_disc/user_data/std_user_data.h"
 
namespace ug {
 
 
template <typename TDomain>
class OutNormCmp
  : public StdUserData<OutNormCmp<TDomain>, MathVector<TDomain::dim>, TDomain::dim, void, UserData<MathVector<TDomain::dim>, TDomain::dim, void> >
{
  static const int dim = TDomain::dim;
  
  typedef TDomain domain_type;
  
  typedef typename TDomain::grid_type grid_type;
  
  typedef MathVector<dim> vec_type;
  
  SmartPtr<UserData<vec_type, dim, void> > m_spData;
  
  SmartPtr<domain_type> m_spDomain;
  
  SubsetGroup m_ssGrp;
  
public:
 
  OutNormCmp
  (
    SmartPtr<domain_type> spDomain, 
    SmartPtr<UserData<vec_type, dim, void> > spData, 
    const char * ss_names 
  )
  : m_spData (spData), m_spDomain (spDomain), m_ssGrp (spDomain->subset_handler ())
  {
  // Parse the subset names:
    std::vector<std::string> vssNames;
    try
    {
      TokenizeString (ss_names, vssNames);
      for (size_t k = 0; k < vssNames.size (); k++)
        RemoveWhitespaceFromString (vssNames [k]);
      m_ssGrp.clear ();
      m_ssGrp.add (vssNames);
    } UG_CATCH_THROW ("SubsetIndicatorUserData: Failed to parse subset names.");
  }
  
  OutNormCmp
  (
    SmartPtr<domain_type> spDomain, 
    SmartPtr<UserData<vec_type, dim, void> > spData 
  )
  : m_spData (spData), m_spDomain (spDomain), m_ssGrp (spDomain->subset_handler ())
  {}
  
  virtual bool continuous () const {return false;}
 
  virtual bool requires_grid_fct () const {return m_spData->requires_grid_fct ();}
  // Remark: Note that actually we have not enought data for that. This dependence is neglected.
 
  template <int refDim>
  inline void evaluate
  (
    vec_type vValue[],
    const MathVector<dim> vGlobIP [],
    number time,
    int si,
    GridObject * elem,
    const MathVector<dim> vCornerCoords [],
    const MathVector<refDim> vLocIP [],
    const size_t nip,
    LocalVector * u,
    const MathMatrix<refDim, dim> * vJT = NULL
  ) const
  {
    if (refDim == dim)
    {
      (* m_spData) (vValue, vGlobIP, time, si, elem, vCornerCoords, vLocIP, nip, u, vJT);
      return;
    }
    if (refDim != dim - 1)
    {
      UG_THROW ("OutNormCmp: Wrong dimensionality of the subset.");
    }
    
  //  Get the full-dim. element associated with the given side
    typedef typename grid_dim_traits<dim>::grid_base_object fd_elem_type;
    fd_elem_type * fd_elem = NULL;
    int fd_si = -1;
    
    typedef typename Grid::traits<fd_elem_type>::secure_container fd_elem_secure_container_type;
    fd_elem_secure_container_type fd_elem_list;
    grid_type& grid = * (grid_type*) (m_spDomain->grid().get ());
    grid.associated_elements (fd_elem_list, elem);
    
    if (m_ssGrp.empty ()) // no subsets specified; we assume, elem should be the bnd of the whole domain
    {
      if (fd_elem_list.size () == 1)
      {
        fd_elem = fd_elem_list[0];
        fd_si = m_spDomain->subset_handler()->get_subset_index (fd_elem);
      }
      // otherwise this is no boundary of the domain and we return 0
    }
    else
    {
      for (size_t k = 0; k < fd_elem_list.size (); k++)
      {
        fd_elem_type * e = fd_elem_list[k];
        int e_si = m_ssGrp.subset_handler()->get_subset_index (e);
        if (m_ssGrp.contains (e_si))
        {
          if (fd_elem != NULL) // i.e. e is already the second one
          { // this is no boundary of the subset; return 0
            fd_elem = NULL;
            break;
          }
          fd_elem = e;
          fd_si = e_si;
        }
      }
    }
    if (fd_elem == NULL)
    { // this is no bondary, return 0
      for (size_t ip = 0; ip < nip; ip++) vValue[ip] = 0;
      return;
    }
    
  //  Get the coordinates of the corners of the full-dim. element
    std::vector<MathVector<dim> > fd_elem_corner_coords (domain_traits<dim>::MaxNumVerticesOfElem);
    CollectCornerCoordinates (fd_elem->base_object_id (), fd_elem_corner_coords,
      *fd_elem, *m_spDomain, true);
    
  //  Convert the local ip coordinates (use the global coordinates as they are the same)
    const ReferenceObjectID fd_roid = fd_elem->reference_object_id ();
    DimReferenceMapping<dim, dim> & fd_map
      = ReferenceMappingProvider::get<dim, dim> (fd_roid, fd_elem_corner_coords);
    std::vector<MathVector<dim> > fd_loc_ip (nip);
    for (size_t ip = 0; ip < nip; ip++)
      fd_map.global_to_local(fd_loc_ip[ip], vGlobIP[ip]);
  
  //  Call the original UserData, get the vectors
    (* m_spData) (&(vValue[0]), vGlobIP, time, fd_si, fd_elem, &(fd_elem_corner_coords[0]),
      &(fd_loc_ip[0]), nip, u);
    //TODO: Note that u is here a dummy parameter: We do not have enough data for it.
  
  //  Project the vectors
    const ReferenceObjectID roid = elem->reference_object_id ();
    DimReferenceMapping<refDim, dim> & map
      = ReferenceMappingProvider::get<refDim, dim> (roid, vCornerCoords);
    for (size_t ip = 0; ip < nip; ip++)
    {
      MathMatrix<dim, refDim> J;
      MathVector<dim> p (vValue[ip]);
      
      map.jacobian (J, vLocIP[ip]);
      OrthogProjectVec (p, J);      
      vValue[ip] -= p;
    }
  };
  
  void operator()
  (
    vec_type & vValue,
    const MathVector<dim> & globIP,
    number time,
    int si
  )
  const
  {
    UG_THROW("OutNormCmp: Element required for evaluation, but not passed. Cannot evaluate.");
  }
 
  void operator()
  (
    vec_type vValue [],
    const MathVector<dim> vGlobIP [],
    number time,
    int si,
    const size_t nip
  ) const
  {
    UG_THROW("OutNormCmp: Element required for evaluation, but not passed. Cannot evaluate.");
  }
 
};
 
} // end namespace ug
 
#endif // __H__UG__LIB_DISC__SPATIAL_DISC__USER_DATA__ONC_USER_DATA__
 
/* End of File */