scalar_obstacle_impl.h

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/*
 * Copyright (c) 2013-2015:  G-CSC, Goethe University Frankfurt
 * Author: Raphael Prohl
 * 
 * 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.
 */
 
#ifndef __H__UG__LIB_ALGEBRA__OPERATOR__PRECONDITIONER__PROJECTED_GAUSS_SEIDEL__SCALAR_OBSTACLE_IMPL__
#define __H__UG__LIB_ALGEBRA__OPERATOR__PRECONDITIONER__PROJECTED_GAUSS_SEIDEL__SCALAR_OBSTACLE_IMPL__
 
#include "scalar_obstacle.h"
 
namespace ug{
 
//  SCALAR LOWER OBSTACLE
 
template <typename TDomain, typename TAlgebra>
void
ScalarLowerObstacle<TDomain, TAlgebra>::
adjust_sol_and_cor(value_type& sol_i, value_type& c_i, bool& dofIsActive,
    const DoFIndex& dof)
{
  const size_t comp = dof[1];
 
  //  tmpSol := u_{s-1/2} = u_{s-1} + c
  const number tmpSol = BlockRef(sol_i, comp) + BlockRef(c_i, comp);
 
  //  get lower obstacle value corresponding to the dof
  const number obsVal = m_mObstacleValues[dof];
 
  //  check, if dof is active (tmpSol <= obsVal)
  if (!(tmpSol > obsVal))
  {
    //  is active DoF
    m_vActiveDofs.push_back(dof);
 
    //  adjust correction & set solution to obstacle-value
    BlockRef(c_i, comp) = obsVal - BlockRef(sol_i, comp);
    BlockRef(sol_i, comp) = obsVal;
    dofIsActive = true;
  }
}
 
template <typename TDomain, typename TAlgebra>
void
ScalarLowerObstacle<TDomain, TAlgebra>::
adjust_defect_to_constraint(vector_type& d)
{
  for (std::vector<MultiIndex<2> >::iterator itActiveInd = m_vActiveDofs.begin();
      itActiveInd < m_vActiveDofs.end(); ++itActiveInd)
  {
    //  check, if Ax <= b. For that case the new defect is set to zero,
    //  since all equations/constraints are fulfilled
    number defect = BlockRef(d[(*itActiveInd)[0]], (*itActiveInd)[1]);
    if (defect < 0.0)
      BlockRef(d[(*itActiveInd)[0]], (*itActiveInd)[1]) = 0.0;
  }
}
 
template <typename TDomain, typename TAlgebra>
void
ScalarLowerObstacle<TDomain, TAlgebra>::
restrict_obs_values()
{}
 
//  SCALAR UPPER OBSTACLE
 
template <typename TDomain, typename TAlgebra>
void
ScalarUpperObstacle<TDomain, TAlgebra>::
adjust_sol_and_cor(value_type& sol_i, value_type& c_i, bool& dofIsActive,
    const DoFIndex& dof)
{
  const size_t comp = dof[1];
 
  //  tmpSol := u_{s-1/2} = u_{s-1} + c
  const number tmpSol = BlockRef(sol_i, comp) + BlockRef(c_i, comp);
 
  //  get upper obstacle value corresponding to the dof
  const number obsVal = m_mObstacleValues[dof];
 
  //  check, if dof is active (tmpSol >= obsVal)
  if (!(tmpSol < obsVal))
  {
    //  is active DoF
    m_vActiveDofs.push_back(dof);
 
    //  adjust correction & set solution to obstacle-value
    BlockRef(c_i, comp) = obsVal - BlockRef(sol_i, comp);
    BlockRef(sol_i, comp) = obsVal;
    dofIsActive = true;
  }
  //UG_LOG("dof " <<dof<< " is active: " <<dofIsActive<<"\n");
}
 
template <typename TDomain, typename TAlgebra>
void
ScalarUpperObstacle<TDomain, TAlgebra>::
adjust_defect_to_constraint(vector_type& d)
{
  for (std::vector<MultiIndex<2> >::iterator itActiveInd = m_vActiveDofs.begin();
      itActiveInd < m_vActiveDofs.end(); ++itActiveInd)
  {
    //  check, if Ax > b. For that case the new defect is set to zero,
    //  since all equations/constraints are fulfilled
    //UG_LOG("adjust_defect: " << (*itActiveInd)[0] <<","<< (*itActiveInd)[1] << "\n");
    number defect = BlockRef(d[(*itActiveInd)[0]], (*itActiveInd)[1]);
    if (defect > 0.0)
    {
      //UG_LOG("defect > 0 \n");
      BlockRef(d[(*itActiveInd)[0]], (*itActiveInd)[1]) = 0.0;
    }
  }
}
 
template <typename TDomain, typename TAlgebra>
void
ScalarUpperObstacle<TDomain, TAlgebra>::
restrict_obs_values()
{}
 
} // end namespace ug
 
#endif /* __H__UG__LIB_ALGEBRA__OPERATOR__PRECONDITIONER__PROJECTED_GAUSS_SEIDEL__SCALAR_OBSTACLE_IMPL__ */