geometry.h

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/*
 * Copyright (c) 2016:  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_geometry
#define __H__UG_geometry
 
#include "common/util/smart_pointer.h"
#include "common/math/ugmath_types.h"
#include "lib_grid/algorithms/geom_obj_util/geom_obj_util.h"
#include "lib_grid/grid/grid.h"
 
namespace ug{
 
 
template <int dim>
class IGeometry {
public:
  typedef MathVector<dim> vector_t;
 
  IGeometry (Grid& g) :
    m_grid(g)
  {}
 
  virtual ~IGeometry () {}
 
  virtual vector_t pos (Vertex* vrt) const = 0;
  virtual void set_pos (Vertex* vrt, const vector_t& p) = 0;
 
  Grid& grid() const  {return m_grid;}
 
  virtual int position_attachment_dim() const = 0;
  virtual const IAttachment& position_attachment() const = 0;
 
  virtual vector_t element_center(Vertex* e) const  = 0;
  virtual vector_t element_center(Edge* e) const    = 0;
  virtual vector_t element_center(Face* e) const    = 0;
  virtual vector_t element_center(Volume* e) const  = 0;
 
private:
  Grid& m_grid;
};
 
 
typedef IGeometry<1> IGeometry1d;
typedef IGeometry<2> IGeometry2d;
typedef IGeometry<3> IGeometry3d;
 
typedef SmartPtr<IGeometry1d> SPIGeometry1d;
typedef SmartPtr<IGeometry2d> SPIGeometry2d;
typedef SmartPtr<IGeometry3d> SPIGeometry3d;
 
 
 
template <int dim, int attachmentDim>
class Geometry : public IGeometry<dim> {
public:
  typedef IGeometry<dim>          base_t;
  typedef typename base_t::vector_t   vector_t;
  typedef MathVector<attachmentDim>   attached_vector_t;
  typedef Attachment<attached_vector_t> position_attachment_t;
 
  Geometry (Grid& g, position_attachment_t a) :
    base_t (g),
    m_aPos(a)
  {
    UG_COND_THROW (!g.has_vertex_attachment(a),
             "the specified attachment is not attached to the "
             "vertices of the specified grid.");
    m_aaPos.access(g, a);
  }
 
  virtual vector_t pos (Vertex* vrt) const
  {
    return vector_t::from(m_aaPos[vrt]);
  }
 
  virtual void set_pos (Vertex* vrt, const vector_t& p)
  {
    m_aaPos[vrt] = attached_vector_t::from(p);
  }
 
  virtual int position_attachment_dim () const  {return attachmentDim;}
  const IAttachment& position_attachment () const {return m_aPos;}
 
 
  virtual vector_t element_center (Vertex* e) const {
    return vector_t::from(m_aaPos[e]);
  }
 
  virtual vector_t element_center (Edge* e) const {
    return vector_t::from(CalculateCenter(e, m_aaPos));
  }
 
  virtual vector_t element_center (Face* e) const {
    return vector_t::from(CalculateCenter(e, m_aaPos));
  }
 
  virtual vector_t element_center (Volume* e) const {
    return vector_t::from(CalculateCenter(e, m_aaPos));
  }
 
 
private:
  Grid::VertexAttachmentAccessor<position_attachment_t> m_aaPos;
  position_attachment_t                 m_aPos;
};
 
 
 
template <class TAPos>
SPIGeometry3d
MakeGeometry3d (Grid& grid, TAPos aPos)
{
  return make_sp(new Geometry<3, TAPos::ValueType::Size>(grid, aPos));
}
}// end of namespace
 
#endif  //__H__UG_geometry