Developer Documentation
persistence.cc
1 #include <iostream>
2 #include <string>
3 #include <map>
4 // -------------------- OpenMesh
5 #include <OpenMesh/Core/IO/MeshIO.hh>
6 #include <OpenMesh/Core/Mesh/TriMesh_ArrayKernelT.hh>
7 #include <OpenMesh/Core/Mesh/PolyMesh_ArrayKernelT.hh>
8 // -------------------- little helper
9 #include "generate_cube.hh"
10 #include "stats.hh"
11 #include "fill_props.hh"
12 
13 // ----------------------------------------------------------------------------
14 
15 // Set to 1 to use an PolyMesh type.
16 #define UsePolyMesh 1
17 
18 // ----------------------------------------------------------------------------
19 
20 using namespace OpenMesh;
21 
22 // ----------------------------------------------------------------------------
23 
26 
27 #if UsePolyMesh
28 typedef PolyMesh Mesh;
29 #else
30 typedef TriMesh Mesh;
31 #endif
32 
33 // ----------------------------------------------------------------------------
34 
35 #ifndef DOXY_IGNORE_THIS
36 
37 struct MyData
38 {
39  int ival;
40  double dval;
41  bool bval;
42  OpenMesh::Vec4f vec4fval;
43 
44  MyData()
45  : ival(0), dval(0.0), bval(false)
46  { }
47 
48  MyData( const MyData& _cpy )
49  : ival(_cpy.ival), dval(_cpy.dval), bval(_cpy.bval),
50  vec4fval(_cpy.vec4fval)
51  { }
52 
53 
54  // ---------- assignment
55 
56  MyData& operator = (const MyData& _rhs)
57  {
58  ival = _rhs.ival;
59  dval = _rhs.dval;
60  bval = _rhs.bval;
61  vec4fval = _rhs.vec4fval;
62  return *this;
63  }
64 
65  MyData& operator = (int _rhs) { ival = _rhs; return *this; }
66  MyData& operator = (double _rhs) { dval = _rhs; return *this; }
67  MyData& operator = (bool _rhs) { bval = _rhs; return *this; }
68  MyData& operator = (const OpenMesh::Vec4f& _rhs)
69  { vec4fval = _rhs; return *this; }
70 
71 
72  // ---------- comparison
73 
74  bool operator == (const MyData& _rhs) const
75  {
76  return ival == _rhs.ival
77  && dval == _rhs.dval
78  && bval == _rhs.bval
79  && vec4fval == _rhs.vec4fval;
80  }
81 
82  bool operator != (const MyData& _rhs) const { return !(*this == _rhs); }
83 
84 };
85 
86 #endif
87 
88 
89 // ----------------------------------------------------------------------------
90 
91 typedef std::map< std::string, unsigned int > MyMap;
92 
93 
94 // ----------------------------------------------------------------------------
95 
96 #ifndef DOXY_IGNORE_THIS
97 
98 namespace OpenMesh {
99  namespace IO {
100 
101  // support persistence for struct MyData
102 
103  template <> struct binary<MyData>
104  {
105  typedef MyData value_type;
106 
107  static const bool is_streamable = true;
108 
109  // return binary size of the value
110 
111  static size_t size_of(void)
112  {
113  return sizeof(int)+sizeof(double)+sizeof(bool)+sizeof(OpenMesh::Vec4f);
114  }
115 
116  static size_t size_of(const value_type&)
117  {
118  return size_of();
119  }
120 
121  static size_t store(std::ostream& _os, const value_type& _v, bool _swap=false)
122  {
123  size_t bytes;
124  bytes = IO::store( _os, _v.ival, _swap );
125  bytes += IO::store( _os, _v.dval, _swap );
126  bytes += IO::store( _os, _v.bval, _swap );
127  bytes += IO::store( _os, _v.vec4fval, _swap );
128  return _os.good() ? bytes : 0;
129  }
130 
131  static size_t restore( std::istream& _is, value_type& _v, bool _swap=false)
132  {
133  size_t bytes;
134  bytes = IO::restore( _is, _v.ival, _swap );
135  bytes += IO::restore( _is, _v.dval, _swap );
136  bytes += IO::restore( _is, _v.bval, _swap );
137  bytes += IO::restore( _is, _v.vec4fval, _swap );
138  return _is.good() ? bytes : 0;
139  }
140  };
141 
142 
143  template <> struct binary< MyMap >
144  {
145  typedef MyMap value_type;
146 
147  static const bool is_streamable = true;
148 
149  // return generic binary size of self, if known
150  static size_t size_of(void) { return UnknownSize; }
151 
152  // return binary size of the value
153  static size_t size_of(const value_type& _v)
154  {
155  if (_v.empty())
156  return sizeof(unsigned int);
157 
158  value_type::const_iterator it = _v.begin();
159  unsigned int N = _v.size();
160  size_t bytes = IO::size_of(N);
161 
162  for(;it!=_v.end(); ++it)
163  {
164  bytes += IO::size_of( it->first );
165  bytes += IO::size_of( it->second );
166  }
167  return bytes;
168  }
169 
170  static
171  size_t store(std::ostream& _os, const value_type& _v, bool _swap=false)
172  {
173  size_t bytes = 0;
174  unsigned int N = _v.size();
175 
176  value_type::const_iterator it = _v.begin();
177 
178  bytes += IO::store( _os, N, _swap );
179 
180  for (; it != _v.end() && _os.good(); ++it)
181  {
182  bytes += IO::store( _os, it->first, _swap );
183  bytes += IO::store( _os, it->second, _swap );
184  }
185  return _os.good() ? bytes : 0;
186  }
187 
188  static
189  size_t restore( std::istream& _is, value_type& _v, bool _swap=false)
190  {
191  size_t bytes = 0;
192  unsigned int N = 0;
193 
194  _v.clear();
195 
196  bytes += IO::restore( _is, N, _swap );
197 
198  std::string key;
199  size_t val;
200 
201  for (size_t i=0; i<N && _is.good(); ++i)
202  {
203  bytes += IO::restore( _is, key, _swap );
204  bytes += IO::restore( _is, val, _swap );
205  _v[key] = val;
206  }
207  return _is.good() ? bytes : 0;
208  }
209  };
210 
211  }
212 }
213 
214 #endif
215 
216 
217 // ----------------------------------------------------------------------------
218 
219 int main(void)
220 {
221  //
222  Mesh mesh;
223 
224 
225  // generate a geometry
226  generate_cube<Mesh>(mesh);
227 
228 
229  // should display 8 vertices, 18/12 edges, 12/6 faces (Tri/Poly)
230  mesh_stats(mesh);
231 
232 
233  // print out information about properties
234  mesh_property_stats(mesh);
235 
236 
237  std::cout << "Define some custom properties..\n";
238 
239  OpenMesh::VPropHandleT<float> vprop_float;
240  OpenMesh::EPropHandleT<bool> eprop_bool;
242  OpenMesh::HPropHandleT<MyData> hprop_mydata;
244 
245  std::cout << ".. and registrate them at the mesh object.\n";
246 
247  mesh.add_property(vprop_float, "vprop_float");
248  mesh.add_property(eprop_bool, "eprop_bool");
249  mesh.add_property(fprop_string, "fprop_string");
250  mesh.add_property(hprop_mydata, "hprop_mydata");
251  mesh.add_property(mprop_map, "mprop_map");
252 
253 
254  mesh_property_stats(mesh);
255 
256 
257  std::cout << "Now let's fill the props..\n";
258 
259  fill_props(mesh, vprop_float);
260  fill_props(mesh, eprop_bool);
261  fill_props(mesh, fprop_string);
262  fill_props(mesh, hprop_mydata);
263  fill_props(mesh, mprop_map);
264 
265 
266  std::cout << "Check props..\n";
267 #define CHK_PROP( PH ) \
268  std::cout << " " << #PH << " " \
269  << (fill_props(mesh, PH, true)?"ok\n":"error\n")
270 
271  CHK_PROP(vprop_float);
272  CHK_PROP(eprop_bool);
273  CHK_PROP(fprop_string);
274  CHK_PROP(hprop_mydata);
275  CHK_PROP(mprop_map);
276 #undef CHK_PROP
277 
278 
279  std::cout << "Set persistent flag..\n";
280 #define SET_PERS( PH ) \
281  mesh.property(PH).set_persistent(true); \
282  std::cout << " " << #PH << " " \
283  << (mesh.property(PH).persistent()?"ok\n":"failed!\n")
284 
285  mesh.property(vprop_float).set_persistent(true);
286  std::cout << " vprop_float "
287  << (mesh.property(vprop_float).persistent()?"ok\n":"failed!\n");
288 
289  SET_PERS( eprop_bool );
290  SET_PERS( fprop_string );
291  SET_PERS( hprop_mydata );
292  mesh.mproperty(mprop_map).set_persistent(true);
293  std::cout << " mprop_map "
294  << (mesh.mproperty(mprop_map).persistent()?"ok\n":"failed!\n");
295 
296 
297  std::cout << "Write mesh..";
298  if (IO::write_mesh( mesh, "persistence-check.om" ))
299  std::cout << " ok\n";
300  else
301  {
302  std::cout << " failed\n";
303  return 1;
304  }
305 
306 
307  std::cout << "Clear mesh\n";
308  mesh.clear();
309  mesh_stats(mesh, " ");
310 
311 
312  std::cout << "Read back mesh..";
313  try
314  {
315  if (IO::read_mesh( mesh, "persistence-check.om" ))
316  std::cout << " ok\n";
317  else
318  {
319  std::cout << " failed!\n";
320  return 1;
321  }
322  mesh_stats(mesh, " ");
323  }
324  catch( std::exception &x )
325  {
326  std::cerr << x.what() << std::endl;
327  return 1;
328  }
329 
330 
331  std::cout << "Check props..\n";
332 #define CHK_PROP( PH ) \
333  std::cout << " " << #PH << " " \
334  << (fill_props(mesh, PH, true)?"ok\n":"error\n")
335  CHK_PROP(vprop_float);
336  CHK_PROP(eprop_bool);
337  CHK_PROP(fprop_string);
338  CHK_PROP(hprop_mydata);
339  CHK_PROP(mprop_map);
340 #undef CHK_PROP
341 
342  return 0;
343 }
344 
345 // end of file
346 // ============================================================================
size_t size_of(const T &_v)
Definition: StoreRestore.hh:94
OpenMesh::PolyMesh_ArrayKernelT< PolyTraits > PolyMesh
Simple Name for Mesh.
bool read_mesh(Mesh &_mesh, const std::string &_filename)
Read a mesh from file _filename.
Definition: MeshIO.hh:104
OpenMesh::TriMesh_ArrayKernelT< TriTraits > TriMesh
Simple Name for Mesh.
bool write_mesh(const Mesh &_mesh, const std::string &_filename, Options _opt=Options::Default, std::streamsize _precision=6)
Write a mesh to the file _filename.
Definition: MeshIO.hh:199