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smooth_mesh.hh
1 /*===========================================================================*\
2 * *
3 * OpenMesh *
4 * Copyright (C) 2001-2012 by Computer Graphics Group, RWTH Aachen *
5 * www.openmesh.org *
6 * *
7 *---------------------------------------------------------------------------*
8 * This file is part of OpenMesh. *
9 * *
10 * OpenMesh is free software: you can redistribute it and/or modify *
11 * it under the terms of the GNU Lesser General Public License as *
12 * published by the Free Software Foundation, either version 3 of *
13 * the License, or (at your option) any later version with the *
14 * following exceptions: *
15 * *
16 * If other files instantiate templates or use macros *
17 * or inline functions from this file, or you compile this file and *
18 * link it with other files to produce an executable, this file does *
19 * not by itself cause the resulting executable to be covered by the *
20 * GNU Lesser General Public License. This exception does not however *
21 * invalidate any other reasons why the executable file might be *
22 * covered by the GNU Lesser General Public License. *
23 * *
24 * OpenMesh is distributed in the hope that it will be useful, *
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
27 * GNU Lesser General Public License for more details. *
28 * *
29 * You should have received a copy of the GNU LesserGeneral Public *
30 * License along with OpenMesh. If not, *
31 * see <http://www.gnu.org/licenses/>. *
32 * *
33 \*===========================================================================*/
34
35 /*===========================================================================*\
36 * *
37 * $Revision: 736 $ *
38 * $Date: 2012-10-08 09:30:49 +0200 (Mo, 08 Okt 2012) $ *
39 * *
40 \*===========================================================================*/
41
42 #ifndef SMOOTH_MESH_HH
43 #define SMOOTH_MESH_HH
44
45 //== INCLUDES =================================================================
46
47 #include <OpenMesh/Core/Utils/Property.hh>
48
49 //== NAMESPACE ================================================================
50
51 namespace OpenMesh { //BEGIN_NS_OPENMESH
52
53 template <class _Mesh, class _PropertyHandle>
54 void smooth_mesh_property(unsigned int _n_iters, _Mesh& _m, _PropertyHandle _pph)
55 {
56 typedef typename _PropertyHandle::Value Value;
57
58 std::vector<Value> temp_values(_m.n_vertices());
59
60 for (unsigned int i=0; i < _n_iters; ++i)
61 {
62 for ( typename _Mesh::ConstVertexIter cv_it = _m.vertices_begin();
63 cv_it != _m.vertices_end(); ++cv_it)
64 {
65 unsigned int valence = 0;
66
67 Value& temp_value = temp_values[cv_it.handle().idx()];
68
69 temp_value.vectorize(0);
70
71 for ( typename _Mesh::ConstVertexVertexIter cvv_it = _m.cvv_iter(cv_it);
72 cvv_it; ++cvv_it)
73 {
74 temp_value += _m.property(_pph,cvv_it);
75 ++valence;
76 }
77 if (valence > 0)
78 {//guard against isolated vertices
79 temp_value *= (typename Value::value_type)(1.0 / valence);
80 }
81 else
82 {
83 temp_value = _m.property(_pph, cv_it);
84 }
85 }
86
87 for ( typename _Mesh::ConstVertexIter cv_it = _m.vertices_begin();
88 cv_it != _m.vertices_end(); ++cv_it)
89 {
90 _m.property(_pph,cv_it) = temp_values[cv_it.handle().idx()];
91 }
92 }
93 }
94
95 template <class _Mesh>
96 void smooth_mesh(_Mesh& _m, uint _n_iters)
97 {
98 smooth_mesh_property(_n_iters, _m, _m.points_pph());
99 }
100
101 };//namespace OpenMesh
102
103 #endif//SMOOTH_MESH_HH