OpenMesh

- Main Page
- Related Pages
- Modules
- Namespaces
- Classes
- Files

- File List
- File Members

All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
LoopSchemeMaskT.hh
1 /*===========================================================================*\
2 * *
3 * OpenMesh *
4 * Copyright (C) 2001-2014 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: 990 $ *
38 * $Date: 2014-02-05 10:01:07 +0100 (Mi, 05. Feb 2014) $ *
39 * *
40 \*===========================================================================*/
41
42 #ifndef LOOPSCHEMEMASKT_HH
43 #define LOOPSCHEMEMASKT_HH
44
45 #include <cmath>
46 #include <vector>
47
48 #include <OpenMesh/Core/System/config.h>
49 #include <OpenMesh/Core/Utils/SingletonT.hh>
50
51 namespace OpenMesh
52 {
53
62 template <class T_, unsigned int cache_size_ = 100>
63 class LoopSchemeMaskT
64 {
65 public:
66 enum { cache_size = cache_size_ };
67 typedef T_ Scalar;
68
69 protected:
70
71 Scalar proj_weights_[cache_size];
72 Scalar limit_weights_[cache_size];
73 Scalar step_weights_[cache_size];
74 std::vector<Scalar> tang0_weights_[cache_size];
75 std::vector<Scalar> tang1_weights_[cache_size];
76
77 protected:
78
79 inline static Scalar compute_proj_weight(uint _valence)
80 {
81 //return pow(3.0 / 2.0 + cos(2.0 * M_PI / _valence), 2) / 2.0 - 1.0;
82 double denom = (3.0 + 2.0*cos(2.0*M_PI/(double)_valence));
83 double weight = (64.0*_valence)/(40.0 - denom*denom) - _valence;
84 return (Scalar) weight;
85 }
86
87 inline static Scalar compute_limit_weight(uint _valence)
88 {
89 double proj_weight = compute_proj_weight(_valence);
90 proj_weight = proj_weight/(proj_weight + _valence);//normalize the proj_weight
91 double weight = (3.0/8.0)/(1.0 - proj_weight + (3.0/8.0));
92 return (Scalar)weight;
93 }
94
95 inline static Scalar compute_step_weight(uint _valence)
96 {
97 double proj_weight = compute_proj_weight(_valence);
98 proj_weight = proj_weight/(proj_weight + _valence);//normalize the proj_weight
99 double weight = proj_weight - (3.0/8.0);
100 return (Scalar)weight;
101 }
102
103 inline static Scalar compute_tang0_weight(uint _valence, uint _ver_id)
104 {
105 return (Scalar)cos(2.0*M_PI*(double)_ver_id/(double)_valence);
106 }
107
108 inline static Scalar compute_tang1_weight(uint _valence, uint _ver_id)
109 {
110 return (Scalar)sin(2.0*M_PI*(double)_ver_id/(double)_valence);
111 }
112
113 void cache_weights()
114 {
115 proj_weights_[0] = 1;
116 for (uint k = 1; k < cache_size; ++k)
117 {
118 proj_weights_[k] = compute_proj_weight(k);
119 limit_weights_[k] = compute_limit_weight(k);
120 step_weights_[k] = compute_step_weight(k);
121 tang0_weights_[k].resize(k);
122 tang1_weights_[k].resize(k);
123 for (uint i = 0; i < k; ++i)
124 {
125 tang0_weights_[k][i] = compute_tang0_weight(k,i);
126 tang1_weights_[k][i] = compute_tang1_weight(k,i);
127 }
128 }
129 }
130
131 public:
132
133 LoopSchemeMaskT()
134 {
135 cache_weights();
136 }
137
138 inline Scalar proj_weight(uint _valence) const
139 {
140 assert(_valence < cache_size );
141 return proj_weights_[_valence];
142 }
143
144 inline Scalar limit_weight(uint _valence) const
145 {
146 assert(_valence < cache_size );
147 return limit_weights_[_valence];
148 }
149
150 inline Scalar step_weight(uint _valence, uint _step) const
151 {
152 assert(_valence < cache_size);
153 return pow(step_weights_[_valence], (int)_step);//can be precomputed
154 }
155
156 inline Scalar tang0_weight(uint _valence, uint _ver_id) const
157 {
158 assert(_valence < cache_size );
159 assert(_ver_id < _valence);
160 return tang0_weights_[_valence][_ver_id];
161 }
162
163 inline Scalar tang1_weight(uint _valence, uint _ver_id) const
164 {
165 assert(_valence < cache_size );
166 assert(_ver_id < _valence);
167 return tang1_weights_[_valence][_ver_id];
168 }
169
170 void dump(uint _max_valency = cache_size - 1) const
171 {
172 assert(_max_valency <= cache_size - 1);
173 //CConsole::printf("(k : pw_k, lw_k): ");
174 for (uint i = 0; i <= _max_valency; ++i)
175 {
176 //CConsole::stream() << "(" << i << " : " << proj_weight(i) << ", " << limit_weight(i) << ", " << step_weight(i,1) << "), ";
177 }
178 //CConsole::printf("\n");
179 }
180 };
181
182 typedef LoopSchemeMaskT<double, 100> LoopSchemeMaskDouble;
183 typedef SingletonT<LoopSchemeMaskDouble> LoopSchemeMaskDoubleSingleton;
184
185 }//namespace OpenMesh
186
187 #endif//LOOPSCHEMEMASKT_HH
188
OpenMesh::SingletonT
A simple singleton template.
Definition: SingletonT.hh:78
OpenMesh::LoopSchemeMaskT
implements cache for the weights of the original Loop scheme supported:
Definition: LoopSchemeMaskT.hh:63