replace_coordinate.h

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/*
 * Copyright (c) 2017:  G-CSC, Goethe University Frankfurt
 * Author: Sebastian Reiter
 * 
 * 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_replace_coordinate
#define __H__UG_replace_coordinate
 
namespace ug{
 
 
template <int dim>
class PPP_ReplaceCoordinate : public IPartitionPreProcessor
{
public:
  typedef MathVector<dim>             vector_t;
  typedef Attachment<vector_t>          apos_t;
  typedef Grid::VertexAttachmentAccessor<apos_t>  aapos_t;
 
  PPP_ReplaceCoordinate (apos_t aPos, ANumber aNewCoord, int newCoordIndex) :
    m_aPos (aPos),
    m_aNewCoord (aNewCoord),
    m_newCoordIndex (newCoordIndex)
  {}
 
  
  virtual void partitioning_starts (  MultiGrid* mg,
                                    IPartitioner* partitioner)
  {
    if (!mg->has_vertex_attachment(m_aPos)){
      UG_LOG("WARNING: Target attachment not found in PartitionPreProcessor "
             "PPP_ReplaceCoordinate");
      return;
    }
 
    if (!mg->has_vertex_attachment(m_aNewCoord)){
      UG_LOG("WARNING: Attachment 'aNewCoord' not found in PartitionPreProcessor "
             "PPP_ReplaceCoordinate");
      return;
    }
 
    UG_COND_THROW (!mg->has_vertex_attachment(m_aNewCoord),
                   "VertexAttachment missing: aNewCoord");
 
  //  attach a temporary field where we store the original coordinates
    mg->attach_to_vertices (m_aOrigCoord);
 
  //  store the current original coordinate of m_aPos in m_aOrigCoord
  //  and replace with new coordinate
 
    typename aapos_t::ContainerType& positions
      = *mg->get_attachment_data_container<Vertex> (m_aPos);
 
    typename ANumber::ContainerType& origCoords
      = *mg->get_attachment_data_container<Vertex> (m_aOrigCoord);
 
    typename ANumber::ContainerType& newCoords
      = *mg->get_attachment_data_container<Vertex> (m_aNewCoord);
 
    UG_COND_THROW ( (positions.size() != origCoords.size())
                    || (positions.size() != newCoords.size()),
                    "Attachment containers have incompatible sizes");
 
    for(size_t i = 0; i < positions.size(); ++i){
      origCoords[i] = positions[i][m_newCoordIndex];
      positions[i][m_newCoordIndex] = newCoords[i];
    }
  }
 
  
  virtual void partitioning_done (  MultiGrid* mg,
                                    IPartitioner* partitioner)
  {
    if (!mg->has_vertex_attachment(m_aPos)){
      UG_LOG("WARNING: Target attachment not found in PartitionPreProcessor "
             "PPP_ReplaceCoordinate");
      return;
    }
 
    if (!mg->has_vertex_attachment(m_aOrigCoord)){
      UG_LOG("WARNING: Attachment 'aOrigCoord' not found in PartitionPreProcessor "
             "PPP_ReplaceCoordinate");
      return;
    }
 
    typename aapos_t::ContainerType& positions
      = *mg->get_attachment_data_container<Vertex> (m_aPos);
 
    typename ANumber::ContainerType& origCoords
      = *mg->get_attachment_data_container<Vertex> (m_aOrigCoord);
 
    UG_COND_THROW ( positions.size() != origCoords.size(),
                    "Attachment containers have incompatible sizes");
 
    for(size_t i = 0; i < positions.size(); ++i){
      positions[i][m_newCoordIndex] = origCoords[i];
    }
 
    mg->detach_from_vertices (m_aOrigCoord);
  }
 
private:
  apos_t    m_aPos;
  ANumber   m_aNewCoord;
  ANumber   m_aOrigCoord;
  int     m_newCoordIndex;
};
 
}// end of namespace
 
#endif  //__H__UG_replace_coordinate