Line data Source code
1 : /*
2 : * Copyright (c) 2016: 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__UG_geometry
34 : #define __H__UG_geometry
35 :
36 : #include "common/util/smart_pointer.h"
37 : #include "common/math/ugmath_types.h"
38 : #include "lib_grid/algorithms/geom_obj_util/geom_obj_util.h"
39 : #include "lib_grid/grid/grid.h"
40 :
41 : namespace ug{
42 :
43 : /// provides a grid and access to the coordinates of the vertices
44 : /** The class serves as a base class for wrappers around grid coordinates. It
45 : * allows for the implementation of fixed-dim classes which can operate on
46 : * coordinates arbitrary dimension.
47 : *
48 : * Vertex coordinates of the fixed dimension 'dim' can be accessed through the
49 : * method 'pos' and can be set through the method 'set_pos'.
50 : *
51 : * For code that has to operate on the original position attachment, the following
52 : * methods are provided: The dimension of the original 'attached'
53 : * coordinates can be accessed through 'position_attachment_dim'. The attachement
54 : * for those original coordinates can be accessed through 'position_attachment'.
55 : *
56 : * If 'attachmentDim == position_attachment_dim()', then the return value of
57 : * 'position_attachment' must always be castable to
58 : * 'Attachment<MathVector<attachmentDim> >'.
59 : *
60 : * \sa Geometry
61 : */
62 : template <int dim>
63 : class IGeometry {
64 : public:
65 : typedef MathVector<dim> vector_t;
66 :
67 0 : IGeometry (Grid& g) :
68 0 : m_grid(g)
69 : {}
70 :
71 : virtual ~IGeometry () {}
72 :
73 : virtual vector_t pos (Vertex* vrt) const = 0;
74 : virtual void set_pos (Vertex* vrt, const vector_t& p) = 0;
75 :
76 0 : Grid& grid() const {return m_grid;}
77 :
78 : virtual int position_attachment_dim() const = 0;
79 : virtual const IAttachment& position_attachment() const = 0;
80 :
81 : virtual vector_t element_center(Vertex* e) const = 0;
82 : virtual vector_t element_center(Edge* e) const = 0;
83 : virtual vector_t element_center(Face* e) const = 0;
84 : virtual vector_t element_center(Volume* e) const = 0;
85 :
86 : private:
87 : Grid& m_grid;
88 : };
89 :
90 :
91 : typedef IGeometry<1> IGeometry1d;
92 : typedef IGeometry<2> IGeometry2d;
93 : typedef IGeometry<3> IGeometry3d;
94 :
95 : typedef SmartPtr<IGeometry1d> SPIGeometry1d;
96 : typedef SmartPtr<IGeometry2d> SPIGeometry2d;
97 : typedef SmartPtr<IGeometry3d> SPIGeometry3d;
98 :
99 :
100 : /// provides a grid and access to the coordinates of the vertices
101 : /** The dimension of the output coordinates ('dim') may differ from the
102 : * dimension of the coordinates which are actually attached to the grid ('attachedDim').
103 : */
104 : template <int dim, int attachmentDim>
105 : class Geometry : public IGeometry<dim> {
106 : public:
107 : typedef IGeometry<dim> base_t;
108 : typedef typename base_t::vector_t vector_t;
109 : typedef MathVector<attachmentDim> attached_vector_t;
110 : typedef Attachment<attached_vector_t> position_attachment_t;
111 :
112 0 : Geometry (Grid& g, position_attachment_t a) :
113 : base_t (g),
114 0 : m_aPos(a)
115 : {
116 0 : UG_COND_THROW (!g.has_vertex_attachment(a),
117 : "the specified attachment is not attached to the "
118 : "vertices of the specified grid.");
119 : m_aaPos.access(g, a);
120 0 : }
121 :
122 0 : virtual vector_t pos (Vertex* vrt) const
123 : {
124 0 : return vector_t::from(m_aaPos[vrt]);
125 : }
126 :
127 0 : virtual void set_pos (Vertex* vrt, const vector_t& p)
128 : {
129 : m_aaPos[vrt] = attached_vector_t::from(p);
130 0 : }
131 :
132 0 : virtual int position_attachment_dim () const {return attachmentDim;}
133 0 : const IAttachment& position_attachment () const {return m_aPos;}
134 :
135 :
136 0 : virtual vector_t element_center (Vertex* e) const {
137 0 : return vector_t::from(m_aaPos[e]);
138 : }
139 :
140 0 : virtual vector_t element_center (Edge* e) const {
141 0 : return vector_t::from(CalculateCenter(e, m_aaPos));
142 : }
143 :
144 0 : virtual vector_t element_center (Face* e) const {
145 0 : return vector_t::from(CalculateCenter(e, m_aaPos));
146 : }
147 :
148 0 : virtual vector_t element_center (Volume* e) const {
149 0 : return vector_t::from(CalculateCenter(e, m_aaPos));
150 : }
151 :
152 :
153 : private:
154 : Grid::VertexAttachmentAccessor<position_attachment_t> m_aaPos;
155 : position_attachment_t m_aPos;
156 : };
157 :
158 :
159 :
160 : /// Utility method to construct an IGeometry3d for a given grid and position attachment
161 : template <class TAPos>
162 : SPIGeometry3d
163 0 : MakeGeometry3d (Grid& grid, TAPos aPos)
164 : {
165 0 : return make_sp(new Geometry<3, TAPos::ValueType::Size>(grid, aPos));
166 : }
167 : }// end of namespace
168 :
169 : #endif //__H__UG_geometry
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