ls_init.h

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/*
 * Copyright (c) 2015:  G-CSC, Goethe University Frankfurt
 * Authors: Christian Wehner, Dmitry Logashenko
 * 
 * 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.
 */
 
/*
 * Initialization of the level-set function.
 */
 
#ifndef __H__UG__PLUGINS__LEVEL_SET__LS_INIT_H__
#define __H__UG__PLUGINS__LEVEL_SET__LS_INIT_H__
 
#include <vector>
 
// ug4 headers
#include "common/common.h"
#include "common/util/raster.h"
#include "lib_grid/algorithms/space_partitioning/lg_ntree.h"
#include "lib_disc/function_spaces/grid_function.h"
 
namespace ug{
namespace LevelSet{
 
template <typename TGridFunc>
class LSFbyRaster
{
  typedef LSFbyRaster<TGridFunc> this_type;
  
  typedef TGridFunc grid_func_type;
  
  typedef typename TGridFunc::domain_type domain_type;
  
  typedef typename TGridFunc::algebra_type algebra_type;
  
  typedef typename domain_type::grid_type grid_type;
  
  typedef typename domain_type::position_attachment_type position_attachment_type;
  
  typedef typename domain_type::position_accessor_type position_accessor_type;
  
  static const int dim = TGridFunc::dim;
  
  typedef typename TGridFunc::template traits<Vertex>::const_iterator VertexConstIterator;
 
  typedef typename grid_dim_traits<dim>::element_type elem_t;
 
  typedef typename grid_dim_traits<dim-1>::element_type side_t;
  
public:
  
  LSFbyRaster
  (
    const char * raster_file 
  )
  : m_bRelative (false), m_rt_gl (-1), m_rt_tol (1e-6), m_bDefaultTop (false), m_localTopFacesOnly (false)
  {
    m_raster.load_from_asc(raster_file);
  }
  
  void interpolate_to
  (
    SmartPtr<TGridFunc> spLSF 
  );
  
  void set_relative_to
  (
    const char * top_ss_names 
  )
  {
    m_top_ss_names = top_ss_names;
    m_bRelative = true;
  }
  
  void set_relative_to
  (
    const char * top_ss_names, 
    int grid_level 
  )
  {
    m_top_ss_names = top_ss_names;
    m_rt_gl = grid_level;
    m_bRelative = true;
  }
  
  void set_rel_tolerance
  (
    number tolerance 
  )
  {
    m_rt_tol = tolerance;
  }
  
  void set_rel_default
  (
    number default_top_z 
  )
  {
    m_rt_default = default_top_z;
    m_bDefaultTop = true;
  }
 
 
  void set_local_top_faces_only(
    bool localTopFacesOnly
  )
  {
    m_localTopFacesOnly = localTopFacesOnly;
  }
  
private:
 
  typedef Raster<number, dim - 1> raster_t;
  raster_t m_raster;
  
  bool m_bRelative;
  
  std::string m_top_ss_names;
  
  int m_rt_gl;
  
  number m_rt_tol;
  
  number m_rt_default;
  
  bool m_bDefaultTop;
 
  bool m_localTopFacesOnly;
  
  
  class z_ray_tracer_t
  {
    typedef lg_ntree<dim-1, dim, side_t> top_tracer_tree_t;
  
    typedef RayElemIntersectionRecord<side_t*> top_intersection_record_t;
    
  public:
  
    z_ray_tracer_t
    (
      SmartPtr<domain_type> sp_domain, 
      const std::string & top_ss_names 
    )
    : m_sp_domain (sp_domain),
      m_top_ss_grp (sp_domain->subset_handler (), TokenizeString (top_ss_names))
    {};
    
    void init
    (
      int grid_level 
    );
 
    void init
    (
      int grid_level, 
      bool useLocalTopFacesOnly
    );
    
    bool get_min_at
    (
      const MathVector<dim> & over, 
      number tolerance, 
      number & z 
    );
  
  private:
  
    SmartPtr<domain_type> m_sp_domain;
 
    SubsetGroup m_top_ss_grp;
 
# ifdef UG_PARALLEL
    Grid m_top_grid;
# endif
    top_tracer_tree_t m_top_tracer_tree;
    
    std::vector<top_intersection_record_t> m_top_intersection_records;
  };
  
};
 
} // end namespace LevelSet
} // end namespace ug
 
// include implementation
#include "ls_init_impl.h"
 
#endif // __H__UG__PLUGINS__LEVEL_SET__LS_INIT_H__
 
/* End of File */