domain_util_impl.h

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/*
 * Copyright (c) 2010-2015:  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.
 */
 
#ifndef __H__UG__LIB_DISC__DOMAIN_UTIL_GENERAL_IMPL__
#define __H__UG__LIB_DISC__DOMAIN_UTIL_GENERAL_IMPL__
 
#include "domain_util.h"
 
#include <string>
#include <sstream>
 
#include "lib_disc/reference_element/reference_element.h"
 
namespace ug{
 
// CollectCornerCoordinates
 
//  returns the corner coordinates of a geometric object
template <typename TElem, typename TAAPos>
void CollectCornerCoordinates(  std::vector<typename TAAPos::ValueType>& vCornerCoordsOut,
                TElem* elem, const TAAPos& aaPos, bool clearContainer)
{
  if(clearContainer)
    vCornerCoordsOut.clear();
 
  // number of vertices of element
  const size_t numVertices = NumVertices(elem);
 
  // loop vertices
  for(size_t i = 0; i < numVertices; ++i)
  {
    // get element
    Vertex* vert = GetVertex(elem, i);
 
    // write corner coordinates
    vCornerCoordsOut.push_back(aaPos[vert]);
  }
}
 
//  returns the corner coordinates of a geometric object
template <typename TElem, typename TAAPos>
void CollectCornerCoordinates(  std::vector<typename TAAPos::ValueType>& vCornerCoordsOut,
                const TElem& elem, const TAAPos& aaPos, bool clearContainer)
{
//  cast constness away
  TElem* pElem = const_cast<TElem*>(&elem);
 
//  forward
  return CollectCornerCoordinates(vCornerCoordsOut, pElem, aaPos, clearContainer);
}
 
template <typename TElem, typename TDomain>
void CollectCornerCoordinates(  std::vector<typename TDomain::position_type>& vCornerCoordsOut,
                const TElem& elem, const TDomain& domain, bool clearContainer)
{
  // get position accessor
  const typename TDomain::position_accessor_type& aaPos = domain.position_accessor();
 
  CollectCornerCoordinates(vCornerCoordsOut, elem, aaPos, clearContainer);
}
 
template <typename TDomain>
void CollectCornerCoordinates(int base_object_id,
      std::vector<typename TDomain::position_type>& vCornerCoordsOut,
      GridObject& elem, const TDomain& domain, bool clearContainer)
{
  switch(base_object_id)
  {
    case VERTEX: CollectCornerCoordinates<Vertex, TDomain>(vCornerCoordsOut, *dynamic_cast< Vertex*>(&elem), domain, clearContainer); return;
    case EDGE: CollectCornerCoordinates<Edge, TDomain>(vCornerCoordsOut, *dynamic_cast< Edge*>(&elem), domain, clearContainer); return;
    case FACE: CollectCornerCoordinates<Face, TDomain>(vCornerCoordsOut, *dynamic_cast< Face*>(&elem), domain, clearContainer); return;
    case VOLUME: CollectCornerCoordinates<Volume, TDomain>(vCornerCoordsOut, *dynamic_cast< Volume*>(&elem), domain, clearContainer); return;
    default: UG_THROW("CollectCornerCoordinates, base_object_id " << base_object_id << "unknown.");
  }
}
 
template <typename TElem, typename TDomain>
void FillCornerCoordinates( typename TDomain::position_type vCornerCoordsOut[],
                            const TElem& elem, const TDomain& domain)
{
  // get position accessor
  const typename TDomain::position_accessor_type& aaPos = domain.position_accessor();
 
  const Vertex* const* vVertex = const_cast<TElem*>(&elem)->vertices();
 
  // write corner coordinates
  for(size_t i = 0; i < TElem::NUM_VERTICES; ++i)
    vCornerCoordsOut[i] = aaPos[vVertex[i]];
}
 
 
template <typename TDomain>
void FillCornerCoordinates( typename TDomain::position_type vCornerCoordsOut[],
                            const RegularVertex& vtx, const TDomain& domain)
{
  // get position accessor
  const typename TDomain::position_accessor_type& aaPos = domain.position_accessor();
 
  // write vertex coordinates
  vCornerCoordsOut[0] = aaPos[&vtx];
}
 
template <typename TElem, typename TPosition>
number ElementSize(const TElem& elem, const Grid::VertexAttachmentAccessor<Attachment<TPosition> >& aaPos)
{
  // corner coords
  std::vector<TPosition> vCornerCoords;
 
  // load corner coords
  CollectCornerCoordinates(vCornerCoords, elem, aaPos);
 
  // get reference element type
  typedef typename reference_element_traits<TElem>::reference_element_type TRefElem;
 
  // dimension of Positions
  static const int dim = TPosition::Size;
 
  // return Element Size
  return ElementSize<TRefElem, dim>(&vCornerCoords[0]);
}
 
template <typename TElem, typename TDomain>
number ElementSize(const TElem& elem, const TDomain& domain)
{
  // get position accessor
  const typename TDomain::position_accessor_type& aaPos = domain.position_accessor();
 
  return ElementSize(elem, aaPos);
}
 
//  ElementDiameter
 
template <typename TElem, typename TDomain>
number ElementDiameterSq(TElem& elem, TDomain& domain)
{
  return ElementDiameterSq(*domain.grid(), domain.position_accessor(), &elem);
}
 
template <typename TElem, typename TDomain>
number ElementDiameter(TElem& elem, TDomain& domain)
{
  return ElementDiameter(*domain.grid(), domain.position_accessor(), &elem);
}
 
} // end namespace ug
 
#endif /* __H__UG__LIB_DISC__DOMAIN_UTIL_GENERAL_IMPL__ */