raster_layers_projector.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_raster_layers_projector
#define __H__UG_raster_layers_projector
 
#include "lib_grid/global_attachments.h"
#include "refinement_projector.h"
#include "lib_grid/algorithms/raster_layer_util.h"
 
namespace ug{
 
class RasterLayersProjector : public RefinementProjector {
public:
  typedef ANumber         rel_z_attachment_t;
  typedef Grid::VertexAttachmentAccessor<ANumber> rel_z_attachment_accessor_t;
 
  RasterLayersProjector ()  {}
 
  RasterLayersProjector (SPIGeometry3d geometry) :
    RefinementProjector (geometry)
  {add_attachments();}
 
  RasterLayersProjector (SPIGeometry3d geometry, SPRasterLayers layers) :
    RefinementProjector (geometry)
  {add_attachments();
   set_layers(layers);}
 
  void set_geometry(SPIGeometry3d g)
  {
    if(g == geometry())
      return;
 
    remove_attachments();
    RefinementProjector::set_geometry(g);
    add_attachments();
  }
 
  void set_layers(SPRasterLayers layers)
  {m_layers = layers;}
 
  rel_z_attachment_t      rel_z_attachment () const     {return m_aRelZ;}
  rel_z_attachment_accessor_t rel_z_attachment_accessor () const  {return m_aaRelZ;}
 
  number average_rel_z(Vertex* e) const {return m_aaRelZ[e];}
 
  template <class TElem>
  number average_rel_z(TElem* e) const
  {
    typename TElem::ConstVertexArray  vrts = e->vertices();
    const size_t numVrts = e->num_vertices();
    if(numVrts == 0)
      return 0;
 
    number relZ = 0;
    for(size_t i = 0; i < numVrts; ++i){
      relZ += m_aaRelZ[vrts[i]];
    }
 
    return relZ / (number)numVrts;
  }
 
  virtual number new_vertex(Vertex* vrt, Vertex* parent)
  {
    m_aaRelZ[vrt] = m_aaRelZ[parent];
    set_pos(vrt, pos(parent));
    return 1;
  }
 
  virtual number new_vertex(Vertex* vrt, Edge* parent)
  {
    return new_vertex_impl(vrt, parent);
  }
 
  virtual number new_vertex(Vertex* vrt, Face* parent)
  {
    return new_vertex_impl(vrt, parent);
  }
 
  virtual number new_vertex(Vertex* vrt, Volume* parent)
  {
    return new_vertex_impl(vrt, parent);
  }
 
private:
  template <class TParent>
  number new_vertex_impl(Vertex* vrt, TParent* parent)
  {
    const number relZ = average_rel_z(parent);
    m_aaRelZ[vrt] = relZ;
    vector3 p = geom().element_center(parent);
    p.z() = m_layers->relative_to_global_height(vector2(p.x(), p.y()), relZ);
    set_pos(vrt, p);
    return 1;
  }
 
  void add_attachments ()
  {
    static const std::string attName("RasterLayersProjector_ARelZ");
    if(!GlobalAttachments::is_declared(attName)){
      GlobalAttachments::declare_attachment<rel_z_attachment_t>(attName);
    }
 
    m_aRelZ = GlobalAttachments::attachment<rel_z_attachment_t>(attName);
 
    IGeometry3d& g = geom();
    if(!g.grid().has_attachment<Vertex>(m_aRelZ)){
      g.grid().attach_to_vertices(m_aRelZ);
    }
    m_aaRelZ.access(g.grid(), m_aRelZ);
  }
 
  void remove_attachments ()
  {
    SPIGeometry3d geom = geometry();
    if(geom.valid() && geom->grid().has_vertex_attachment(m_aRelZ)){
      geom->grid().detach_from_vertices(m_aRelZ);
      m_aaRelZ.invalidate();
    }
  }
 
  friend class boost::serialization::access;
 
  template <class Archive>
  void serialize( Archive& ar, const unsigned int version)
  {
    using namespace ug;
    if(ArchiveInfo<Archive>::TYPE == AT_DATA){
      if(m_layers.invalid())
        m_layers = make_sp(new RasterLayers());
      ar & *m_layers;
    }
    else if (ArchiveInfo<Archive>::TYPE == AT_GUI){
    }
 
    UG_EMPTY_BASE_CLASS_SERIALIZATION(RasterLayersProjector, RefinementProjector);
  }
  
  SPRasterLayers        m_layers;
  rel_z_attachment_t      m_aRelZ;
  rel_z_attachment_accessor_t m_aaRelZ;
};
 
typedef SmartPtr<RasterLayersProjector> SPRasterLayersProjector;
 
}// end of namespace
 
#endif  //__H__UG_raster_layers_projector