Line data Source code
1 : /*
2 : * Copyright (c) 2010-2015: G-CSC, Goethe University Frankfurt
3 : * Author: Sebastian Reiter
4 : *
5 : * This file is part of UG4.
6 : *
7 : * UG4 is free software: you can redistribute it and/or modify it under the
8 : * terms of the GNU Lesser General Public License version 3 (as published by the
9 : * Free Software Foundation) with the following additional attribution
10 : * requirements (according to LGPL/GPL v3 §7):
11 : *
12 : * (1) The following notice must be displayed in the Appropriate Legal Notices
13 : * of covered and combined works: "Based on UG4 (www.ug4.org/license)".
14 : *
15 : * (2) The following notice must be displayed at a prominent place in the
16 : * terminal output of covered works: "Based on UG4 (www.ug4.org/license)".
17 : *
18 : * (3) The following bibliography is recommended for citation and must be
19 : * preserved in all covered files:
20 : * "Reiter, S., Vogel, A., Heppner, I., Rupp, M., and Wittum, G. A massively
21 : * parallel geometric multigrid solver on hierarchically distributed grids.
22 : * Computing and visualization in science 16, 4 (2013), 151-164"
23 : * "Vogel, A., Reiter, S., Rupp, M., Nägel, A., and Wittum, G. UG4 -- a novel
24 : * flexible software system for simulating pde based models on high performance
25 : * computers. Computing and visualization in science 16, 4 (2013), 165-179"
26 : *
27 : * This program is distributed in the hope that it will be useful,
28 : * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 : * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 : * GNU Lesser General Public License for more details.
31 : */
32 :
33 : #ifndef __H__LIB_GRID__GLOBAL_MULTI_GRID_REFINER__
34 : #define __H__LIB_GRID__GLOBAL_MULTI_GRID_REFINER__
35 :
36 : #include <vector>
37 : #include "lib_grid/lg_base.h"
38 : #include "lib_grid/multi_grid.h"
39 : #include "refiner_interface.h"
40 :
41 : namespace ug
42 : {
43 :
44 : /// \addtogroup lib_grid_algorithms_refinement
45 : /// @{
46 :
47 : class GlobalMultiGridRefiner : public IRefiner, public GridObserver
48 : {
49 : public:
50 : GlobalMultiGridRefiner(SPRefinementProjector projector = SPNULL);
51 : GlobalMultiGridRefiner(MultiGrid& mg,
52 : SPRefinementProjector projector = SPNULL);
53 :
54 : virtual ~GlobalMultiGridRefiner();
55 :
56 : virtual void grid_to_be_destroyed(Grid* grid);
57 :
58 : void assign_grid(MultiGrid& mg);
59 : void assign_grid(MultiGrid* mg);
60 :
61 0 : virtual Grid* get_associated_grid() {return m_pMG;}
62 0 : virtual Grid* grid() {return m_pMG;}
63 0 : virtual MultiGrid* multi_grid() {return m_pMG;}
64 :
65 0 : virtual bool adaptivity_supported() const {return false;}
66 0 : virtual bool coarsening_supported() const {return false;}
67 :
68 : virtual bool save_marks_to_file(const char* filename);
69 :
70 : protected:
71 : /// returns the number of (globally) marked edges on this level of the hierarchy
72 : virtual void num_marked_edges_local(std::vector<int>& numMarkedEdgesOut);
73 : /// returns the number of (globally) marked faces on this level of the hierarchy
74 : virtual void num_marked_faces_local(std::vector<int>& numMarkedFacesOut);
75 : /// returns the number of (globally) marked volumes on this level of the hierarchy
76 : virtual void num_marked_volumes_local(std::vector<int>& numMarkedVolsOut);
77 :
78 : template <class TElem>
79 : void num_marked_elems(std::vector<int>& numMarkedElemsOut);
80 :
81 : ////////////////////////////////
82 : /// performs refinement on the marked elements.
83 : virtual void perform_refinement();
84 :
85 : /// a callback that allows to deny refinement of special vertices
86 0 : virtual bool refinement_is_allowed(Vertex* elem) {return true;}
87 : /// a callback that allows to deny refinement of special edges
88 0 : virtual bool refinement_is_allowed(Edge* elem) {return true;}
89 : /// a callback that allows to deny refinement of special faces
90 0 : virtual bool refinement_is_allowed(Face* elem) {return true;}
91 : /// a callback that allows to deny refinement of special volumes
92 0 : virtual bool refinement_is_allowed(Volume* elem) {return true;}
93 :
94 : /// this method helps derived classes to perform operations directly before actual element refinement is performed.
95 : /** Called from the refine() method in each refinement-iteration after
96 : * collect_objects_for_refine().
97 : * Default implementation is empty.*/
98 0 : virtual void refinement_step_begins() {};
99 :
100 : /// this method helps derived classes to perform operations directly after actual element refinement took place.
101 : /** Called from the refine() method in each refinement-iteration after
102 : * all scheduled elements had been refined.
103 : * The refine process will either terminate after this method or will
104 : * start a new iteration, if new elements had been marked during refine.
105 : * Default implementation is empty.*/
106 0 : virtual void refinement_step_ends() {};
107 :
108 : protected:
109 : MultiGrid* m_pMG;
110 : };
111 :
112 : /// @}
113 : }// end of namespace
114 :
115 : #endif
|
