fe_geom_impl.h

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/*
 * Copyright (c) 2013-2015:  G-CSC, Goethe University Frankfurt
 * Author: Andreas Vogel
 * 
 * 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.
 */
 
#include "fe_geom.h"
 
namespace ug{
 
// FEGeometry
 
template <  typename TElem, int TWorldDim,
      typename TTrialSpace, typename TQuadratureRule>
FEGeometry<TElem,TWorldDim,TTrialSpace,TQuadratureRule>::
FEGeometry()
: m_rQuadRule(Provider<quad_rule_type>::get()),
  m_rTrialSpace(Provider<trial_space_type>::get())
{
  //  evaluate local shapes and gradients
  for(size_t ip = 0; ip < nip; ++ip)
    for(size_t sh = 0; sh < nsh; ++sh)
    {
      m_vvShape[ip][sh] = m_rTrialSpace.shape(sh, m_rQuadRule.point(ip));
      m_rTrialSpace.grad(m_vvGradLocal[ip][sh], sh, m_rQuadRule.point(ip));
    }
}
 
template <  typename TElem, int TWorldDim,
      typename TTrialSpace, typename TQuadratureRule>
void
FEGeometry<TElem,TWorldDim,TTrialSpace,TQuadratureRule>::
update_local(ReferenceObjectID roid, const LFEID& lfeID, size_t orderQuad)
{
  if(roid != geometry_traits<TElem>::REFERENCE_OBJECT_ID)
    UG_THROW("FEGeometry::update: Geometry only for "
        <<geometry_traits<TElem>::REFERENCE_OBJECT_ID<<", but "
        <<roid<<" requested.");
 
  if(orderQuad > m_rQuadRule.order())
    UG_THROW("FEGeometry::update: Geometry only for order "
        << m_rQuadRule.order()<<", but order "<<
        orderQuad<<" requested.");
}
 
template <  typename TElem, int TWorldDim,
      typename TTrialSpace, typename TQuadratureRule>
void
FEGeometry<TElem,TWorldDim,TTrialSpace,TQuadratureRule>::
update(GridObject* elem, const MathVector<worldDim>* vCorner,
       const LFEID& lfeID, size_t orderQuad)
{
//  check
  UG_ASSERT(orderQuad <= m_rQuadRule.order(), "Wrong order requested.");
 
  UG_ASSERT(dynamic_cast<TElem*>(elem) != NULL, "Wrong element type.");
  TElem* pElem = static_cast<TElem*>(elem);
 
//  check if element changed
  if(pElem == m_pElem) return;
  else m_pElem = pElem;
 
//  update the mapping for the new corners
  m_mapping.update(vCorner);
 
//  compute global integration points
  m_mapping.local_to_global(&m_vIPGlobal[0], local_ips(), nip);
 
//  evaluate global data
  m_mapping.jacobian_transposed_inverse(&m_vJTInv[0], &m_vDetJ[0],
                                        local_ips(), nip);
 
//  compute global gradients
  for(size_t ip = 0; ip < nip; ++ip)
    for(size_t sh = 0; sh < nsh; ++sh)
      MatVecMult(m_vvGradGlobal[ip][sh],
                 m_vJTInv[ip], m_vvGradLocal[ip][sh]);
}
 
} // end namespace ug