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GetFEM: src/getfem/getfem_mesh_level_set.h Source File
GetFEM  5.4.2
getfem_mesh_level_set.h
Go to the documentation of this file.
1 /* -*- c++ -*- (enables emacs c++ mode) */
2 /*===========================================================================
3 
4  Copyright (C) 2005-2020 Julien Pommier
5 
6  This file is a part of GetFEM
7 
8  GetFEM is free software; you can redistribute it and/or modify it
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21  As a special exception, you may use this file as it is a part of a free
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23  instantiate templates or use macros or inline functions from this file,
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30 ===========================================================================*/
31 
32 /**@file getfem_mesh_level_set.h
33  @author Julien Pommier <Julien.Pommier@insa-toulouse.fr>
34  @author Yves Renard <Yves.Renard@insa-toulouse.fr>
35  @date March 04, 2005.
36  @brief Keep informations about a mesh crossed by level-sets.
37 */
38 #ifndef GETFEM_MESH_LEVEL_SET_H__
39 #define GETFEM_MESH_LEVEL_SET_H__
40 
41 #include "getfem_integration.h"
42 #include "getfem_level_set.h"
43 #include "getfem_fem.h"
44 
45 
46 namespace getfem {
47  /** @brief Keep informations about a mesh crossed by level-sets.
48  Cut convexes with respect to the level sets.
49 
50  Note that the cutting won't be conformal.
51  */
53  virtual public dal::static_stored_object {
54  public:
55  typedef std::string subzone;
56  typedef std::set<const subzone *> zone;
57  typedef std::set<const zone*> zoneset;
58 
59  protected :
60 
61  mutable std::set<subzone> allsubzones;
62  mutable std::set<zone> allzones;
63 
65  mesh *linked_mesh_;
66  mutable bool is_adapted_;
67 
68  typedef level_set *plevel_set;
69  std::vector<plevel_set> level_sets; // set of level set
70 
71  typedef std::shared_ptr<mesh> pmesh;
72 
73  struct convex_info {
74  pmesh pmsh;
75  zoneset zones;
76  mesh_region ls_border_faces;
77  convex_info() : pmsh(0) {}
78  };
79 
80  std::map<size_type, convex_info> cut_cv;
81 
82  mutable dal::bit_vector crack_tip_convexes_;
83 
84  public :
85  /// Get number of level-sets referenced in this object.
86  size_type nb_level_sets(void) const { return level_sets.size(); }
87  plevel_set get_level_set(size_type i) const { return level_sets[i]; }
88  void update_from_context(void) const { is_adapted_= false; }
89  bool is_convex_cut(size_type i) const
90  { return (cut_cv.find(i) != cut_cv.end()); }
91  const mesh& mesh_of_convex(size_type i) const {
92  if (is_convex_cut(i)) return *((cut_cv.find(i))->second.pmsh);
93  GMM_ASSERT1(false, "This element is not cut !");
94  }
95 
96  const dal::bit_vector &crack_tip_convexes() const;
97 
98  /// Gives a reference to the linked mesh of type mesh.
99  mesh &linked_mesh(void) const { return *linked_mesh_; }
100  void clear(void);
101 
102  size_type memsize() const {
103  size_type res = sizeof(mesh_level_set)
104  + level_sets.size() * sizeof(plevel_set);
105  for (std::map<size_type, convex_info>::const_iterator it=cut_cv.begin();
106  it != cut_cv.end(); ++it) {
107  res += sizeof(convex_info)
108  + it->second.pmsh->memsize()
109  + it->second.zones.size()
110  * (level_sets.size() + sizeof(std::string *) + sizeof(std::string));
111  }
112  return res;
113  }
114  /** add a new level set. Only a reference is kept, no copy done. */
116  if (std::find(level_sets.begin(), level_sets.end(), &ls)
117  == level_sets.end()) {
118  level_sets.push_back(&ls); touch();
119  is_adapted_ = false;
120  }
121  }
122  void sup_level_set(level_set &ls) {
123  std::vector<plevel_set>::iterator
124  it = std::find(level_sets.begin(), level_sets.end(), &ls);
125  if (it != level_sets.end()) {
126  level_sets.erase(it);
127  is_adapted_ = false;
128  touch();
129  }
130  }
131 
132  /** fill m with the (non-conformal) "cut" mesh. */
133  void global_cut_mesh(mesh &m) const;
134  /** do all the work (cut the convexes wrt the levelsets) */
135  void adapt(void);
136  void merge_zoneset(zoneset &zones1, const zoneset &zones2) const;
137  void merge_zoneset(zoneset &zones1, const std::string &subz) const;
138  const std::string &primary_zone_of_convex(size_type cv) const
139  { return *(zones_of_convexes[cv]); }
140  const zoneset &zoneset_of_convex(size_type cv) const {
141  std::map<size_type, convex_info>::const_iterator it = cut_cv.find(cv);
142  if (it != cut_cv.end()) return (*it).second.zones;
143  GMM_ASSERT1(false, "You cannot call this function for uncut convexes");
144  }
145  // detect the intersection of two or more level sets and the convexes
146  // where the intersection occurs. To be called after adapt.
147  void find_level_set_potential_intersections
148  (std::vector<size_type> &icv, std::vector<dal::bit_vector> &ils);
149 
150  void init_with_mesh(mesh &me);
151  mesh_level_set(mesh &me);
152  mesh_level_set(void);
153  virtual ~mesh_level_set();
154  mesh_level_set(const mesh_level_set &mls) : context_dependencies() {
155  GMM_ASSERT1(linked_mesh_ == 0 && mls.linked_mesh_ == 0,
156  "Copy constructor is not allowed for mesh_level_set");
157  }
158  mesh_level_set & operator=(const mesh_level_set &mls) {
159  GMM_ASSERT1(linked_mesh_ == 0 && mls.linked_mesh_ == 0,
160  "Copy operator is not allowed for mesh_level_set");
161  return *this;
162  }
163 
164 
165  private:
166  void cut_element(size_type cv, const dal::bit_vector &primary,
167  const dal::bit_vector &secondary, scalar_type radius);
168  int is_not_crossed_by(size_type c, plevel_set ls, unsigned lsnum,
169  scalar_type radius);
170  int sub_simplex_is_not_crossed_by(size_type cv, plevel_set ls,
171  size_type sub_cv, scalar_type radius);
172  void find_zones_of_element(size_type cv, std::string &prezone,
173  scalar_type radius);
174 
175  /** For each levelset, if the convex cv is crossed, add the levelset number
176  into 'prim' (and 'sec' is the levelset has a secondary part).
177  zone is also filled with '0', '+', and '-'.
178  */
179  void find_crossing_level_set(size_type cv,
180  dal::bit_vector &prim,
181  dal::bit_vector &sec, std::string &zone,
182  scalar_type radius);
183  void run_delaunay(std::vector<base_node> &fixed_points,
184  gmm::dense_matrix<size_type> &simplexes,
185  std::vector<dal::bit_vector> &fixed_points_constraints);
186 
187  void update_crack_tip_convexes();
188  };
189 
190  void getfem_mesh_level_set_noisy(void);
191 
192  std::ostream &operator<<(std::ostream &os, const mesh_level_set::zone &z);
193  std::ostream &operator<<(std::ostream &os, const mesh_level_set::zoneset &zs);
194 
195 } /* end of namespace getfem. */
196 
197 
198 #endif /* GETFEM_MESH_LEVEL_SET_H__ */
bgeot::operator<<
std::ostream & operator<<(std::ostream &o, const convex_structure &cv)
Print the details of the convex structure cvs to the output stream o.
Definition: bgeot_convex_structure.cc:71
getfem::mesh_level_set::global_cut_mesh
void global_cut_mesh(mesh &m) const
fill m with the (non-conformal) "cut" mesh.
Definition: getfem_mesh_level_set.cc:797
bgeot::size_type
size_t size_type
used as the common size type in the library
Definition: bgeot_poly.h:49
getfem::mesh_level_set::adapt
void adapt(void)
do all the work (cut the convexes wrt the levelsets)
Definition: getfem_mesh_level_set.cc:861
getfem_integration.h
Integration methods (exact and approximated) on convexes.
getfem::mesh_level_set::nb_level_sets
size_type nb_level_sets(void) const
Get number of level-sets referenced in this object.
Definition: getfem_mesh_level_set.h:86
getfem
GEneric Tool for Finite Element Methods.
Definition: getfem_accumulated_distro.h:46
getfem::mesh_level_set
Keep informations about a mesh crossed by level-sets.
Definition: getfem_mesh_level_set.h:52
getfem::context_dependencies
Deal with interdependencies of objects.
Definition: getfem_context.h:81
dal::dynamic_array< const std::string * >
getfem::mesh_level_set::update_from_context
void update_from_context(void) const
this function has to be defined and should update the object when the context is modified.
Definition: getfem_mesh_level_set.h:88
getfem::level_set
Define a level-set.
Definition: getfem_level_set.h:53
dal::static_stored_object
base class for static stored objects
Definition: dal_static_stored_objects.h:206
getfem_level_set.h
Define level-sets.
getfem::mesh
Describe a mesh (collection of convexes (elements) and points).
Definition: getfem_mesh.h:95
getfem::mesh_region
structure used to hold a set of convexes and/or convex faces.
Definition: getfem_mesh_region.h:55
getfem_fem.h
Definition of the finite element methods.
getfem::mesh_level_set::linked_mesh
mesh & linked_mesh(void) const
Gives a reference to the linked mesh of type mesh.
Definition: getfem_mesh_level_set.h:99
getfem::mesh_level_set::add_level_set
void add_level_set(level_set &ls)
add a new level set.
Definition: getfem_mesh_level_set.h:115