TetrahedralCuboidGenerator.cc 15.1 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
/*===========================================================================*\
*                                                                            *
 *                              OpenFlipper                                   *
 *      Copyright (C) 2001-2013 by Computer Graphics Group, RWTH Aachen       *
 *                           www.openflipper.org                              *
 *                                                                            *
 *--------------------------------------------------------------------------- *
 *  This file is part of OpenFlipper.                                         *
 *                                                                            *
 *  OpenFlipper is free software: you can redistribute it and/or modify       *
 *  it under the terms of the GNU Lesser General Public License as            *
 *  published by the Free Software Foundation, either version 3 of            *
 *  the License, or (at your option) any later version with the               *
 *  following exceptions:                                                     *
 *                                                                            *
 *  If other files instantiate templates or use macros                        *
 *  or inline functions from this file, or you compile this file and          *
 *  link it with other files to produce an executable, this file does         *
 *  not by itself cause the resulting executable to be covered by the         *
 *  GNU Lesser General Public License. This exception does not however        *
 *  invalidate any other reasons why the executable file might be             *
 *  covered by the GNU Lesser General Public License.                         *
 *                                                                            *
 *  OpenFlipper is distributed in the hope that it will be useful,            *
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of            *
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the             *
 *  GNU Lesser General Public License for more details.                       *
 *                                                                            *
 *  You should have received a copy of the GNU LesserGeneral Public           *
 *  License along with OpenFlipper. If not,                                   *
 *  see <http://www.gnu.org/licenses/>.                                       *
 *                                                                            *
 \*===========================================================================*/

/*===========================================================================*\
*                                                                            *
 *   $Revision$                                                       *
 *   $LastChangedBy$                                                *
 *   $Date$                     *
 *                                                                            *
 \*===========================================================================*/

#ifdef ENABLE_OPENVOLUMEMESH_POLYHEDRAL_SUPPORT

#include "TetrahedralCuboidGenerator.hh"

void TetrahedralCuboidGenerator::add_vertices(Vector const& position, Vector const& length)
{
    vertices_.clear();
    vertices_.reserve((size_[0] + 1) * (size_[1] + 1) * (size_[2] + 1));

    Vector h(length[0] / size_[0], length[1] / size_[1], length[2] / size_[2]);
    Vector origin = position - 0.5 * length;

    for (std::size_t k = 0; k < size_[2] + 1; ++k)
        for (std::size_t j = 0; j < size_[1] + 1; ++j)
            for (std::size_t i = 0; i < size_[0] + 1; ++i)
                vertices_.push_back(mesh_->add_vertex(Vector(h[0]*i, h[1]*j, h[2]*k) + origin));
}

void TetrahedralCuboidGenerator::get_cube_vertices(std::size_t i, std::size_t j, std::size_t k,
62
        std::vector<OpenVolumeMesh::VertexHandle>& v) const
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
{
    v[0] = vertices_[k * (size_[0] + 1) * (size_[1] + 1) + j * (size_[0] + 1) + i];
    v[1] = vertices_[k * (size_[0] + 1) * (size_[1] + 1) + j * (size_[0] + 1) + i + 1];
    v[2] = vertices_[k * (size_[0] + 1) * (size_[1] + 1) + (j + 1) * (size_[0] + 1) + i];
    v[3] = vertices_[k * (size_[0] + 1) * (size_[1] + 1) + (j + 1) * (size_[0] + 1) + i + 1];
    v[4] = vertices_[(k + 1) * (size_[0] + 1) * (size_[1] + 1) + j * (size_[0] + 1) + i];
    v[5] = vertices_[(k + 1) * (size_[0] + 1) * (size_[1] + 1) + j * (size_[0] + 1) + i + 1];
    v[6] = vertices_[(k + 1) * (size_[0] + 1) * (size_[1] + 1) + (j + 1) * (size_[0] + 1) + i];
    v[7] = vertices_[(k + 1) * (size_[0] + 1) * (size_[1] + 1) + (j + 1) * (size_[0] + 1) + i + 1];
}

void TetrahedralCuboidGenerator::add_faces()
{
    std::vector<OpenVolumeMesh::VertexHandle> v(8);

    for (std::size_t i = 0; i < size_[0]; ++i)
        for (std::size_t j = 0; j < size_[1]; ++j)
            for (std::size_t k = 0; k < size_[2]; ++k)
            {
                get_cube_vertices(i, j, k, v);

                if ((i + j + k) % 2 == 0)
                    add_cube_type_1_faces(i, j, k, v);
                else
                    add_cube_type_2_faces(i, j, k, v);
            }
}

void TetrahedralCuboidGenerator::add_cube_type_1_faces(std::size_t i, std::size_t j, std::size_t k,
92
        std::vector<OpenVolumeMesh::VertexHandle> const& v)
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
{
    std::vector<OpenVolumeMesh::VertexHandle> fv(3);

    // left side
    fv[0] = v[0]; fv[1] = v[2]; fv[2] = v[6];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[0]; fv[1] = v[6]; fv[2] = v[4];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));

    // front side
    fv[0] = v[0]; fv[1] = v[4]; fv[2] = v[5];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[0]; fv[1] = v[5]; fv[2] = v[1];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));

    // bottom side
    fv[0] = v[0]; fv[1] = v[1]; fv[2] = v[3];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[0]; fv[1] = v[3]; fv[2] = v[2];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));

    // inner faces
    fv[0] = v[0]; fv[1] = v[5]; fv[2] = v[6];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[0]; fv[1] = v[3]; fv[2] = v[5];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[0]; fv[1] = v[6]; fv[2] = v[3];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[3]; fv[1] = v[6]; fv[2] = v[5];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));

    // right face
    if (i == size_[0] - 1) {
        fv[0] = v[3]; fv[1] = v[5]; fv[2] = v[1];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
        fv[0] = v[3]; fv[1] = v[7]; fv[2] = v[5];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    }

    // back face
    if (j == size_[1] - 1) {
        fv[0] = v[3]; fv[1] = v[6]; fv[2] = v[7];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
        fv[0] = v[3]; fv[1] = v[2]; fv[2] = v[6];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    }

    // top face
    if (k == size_[2] - 1) {
        fv[0] = v[5]; fv[1] = v[6]; fv[2] = v[4];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
        fv[0] = v[5]; fv[1] = v[7]; fv[2] = v[6];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    }
}

void TetrahedralCuboidGenerator::add_cube_type_2_faces(std::size_t i, std::size_t j, std::size_t k,
150
        std::vector<OpenVolumeMesh::VertexHandle> const& v)
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
{
    std::vector<OpenVolumeMesh::VertexHandle> fv(3);

    // left side
    fv[0] = v[0]; fv[1] = v[2]; fv[2] = v[4];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[2]; fv[1] = v[6]; fv[2] = v[4];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));

    // front side
    fv[0] = v[0]; fv[1] = v[4]; fv[2] = v[1];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[4]; fv[1] = v[5]; fv[2] = v[1];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));

    // bottom side
    fv[0] = v[0]; fv[1] = v[1]; fv[2] = v[2];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[1]; fv[1] = v[3]; fv[2] = v[2];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));

    // inner faces
    fv[0] = v[1]; fv[1] = v[7]; fv[2] = v[4];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[1]; fv[1] = v[2]; fv[2] = v[7];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[2]; fv[1] = v[4]; fv[2] = v[7];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    fv[0] = v[1]; fv[1] = v[4]; fv[2] = v[2];
    faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));

    // right face
    if (i == size_[0] - 1) {
        fv[0] = v[1]; fv[1] = v[7]; fv[2] = v[5];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
        fv[0] = v[1]; fv[1] = v[3]; fv[2] = v[7];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    }

    // back face
    if (j == size_[1] - 1) {
        fv[0] = v[2]; fv[1] = v[7]; fv[2] = v[3];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
        fv[0] = v[2]; fv[1] = v[6]; fv[2] = v[7];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    }

    // top face
    if (k == size_[2] - 1) {
        fv[0] = v[4]; fv[1] = v[7]; fv[2] = v[6];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
        fv[0] = v[4]; fv[1] = v[5]; fv[2] = v[7];
        faces_.insert(std::make_pair(SortedFace(fv), mesh_->add_face(fv)));
    }
}

void TetrahedralCuboidGenerator::add_cells()
{
    std::vector<OpenVolumeMesh::VertexHandle> v(8);

    for (std::size_t i = 0; i < size_[0]; ++i)
        for (std::size_t j = 0; j < size_[1]; ++j)
            for (std::size_t k = 0; k < size_[2]; ++k)
            {
                get_cube_vertices(i, j, k, v);

                if ((i + j + k) % 2 == 0)
                    add_cube_type_1_cells(i, j, k, v);
                else
                    add_cube_type_2_cells(i, j, k, v);
            }
}

void TetrahedralCuboidGenerator::add_cube_type_1_cells(std::size_t i, std::size_t j, std::size_t k,
225
        std::vector<OpenVolumeMesh::VertexHandle> const& v)
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
{
    std::vector<OpenVolumeMesh::FaceHandle> f(4);
    std::vector<OpenVolumeMesh::HalfFaceHandle> hf(4);

    // inner cell
    f[0] = faces_[SortedFace(v[0], v[5], v[6])];
    f[1] = faces_[SortedFace(v[0], v[3], v[5])];
    f[2] = faces_[SortedFace(v[3], v[5], v[6])];
    f[3] = faces_[SortedFace(v[0], v[3], v[6])];
    hf[0] = mesh_->halfface_handle(f[0], 1);
    hf[1] = mesh_->halfface_handle(f[1], 1);
    hf[2] = mesh_->halfface_handle(f[2], 1);
    hf[3] = mesh_->halfface_handle(f[3], 1);
    mesh_->add_cell(hf);

    f[0] = faces_[SortedFace(v[0], v[4], v[6])];
    f[1] = faces_[SortedFace(v[0], v[4], v[5])];
    f[2] = faces_[SortedFace(v[4], v[5], v[6])];
    f[3] = faces_[SortedFace(v[0], v[5], v[6])];
    hf[0] = mesh_->halfface_handle(f[0], 0);
    hf[1] = mesh_->halfface_handle(f[1], 0);
    hf[2] = mesh_->halfface_handle(f[2], 1);
    hf[3] = mesh_->halfface_handle(f[3], 0);
    mesh_->add_cell(hf);

    f[0] = faces_[SortedFace(v[1], v[3], v[5])];
    f[1] = faces_[SortedFace(v[0], v[1], v[5])];
    f[2] = faces_[SortedFace(v[0], v[1], v[3])];
    f[3] = faces_[SortedFace(v[0], v[3], v[5])];
    hf[0] = mesh_->halfface_handle(f[0], 1);
    hf[1] = mesh_->halfface_handle(f[1], 0);
    hf[2] = mesh_->halfface_handle(f[2], 0);
    hf[3] = mesh_->halfface_handle(f[3], 0);
    mesh_->add_cell(hf);

    f[0] = faces_[SortedFace(v[3], v[5], v[7])];
    f[1] = faces_[SortedFace(v[3], v[6], v[7])];
    f[2] = faces_[SortedFace(v[5], v[6], v[7])];
    f[3] = faces_[SortedFace(v[3], v[5], v[6])];
    hf[0] = mesh_->halfface_handle(f[0], 1);
    hf[1] = mesh_->halfface_handle(f[1], 1);
    hf[2] = mesh_->halfface_handle(f[2], 1);
    hf[3] = mesh_->halfface_handle(f[3], 0);
    mesh_->add_cell(hf);

    f[0] = faces_[SortedFace(v[0], v[2], v[6])];
    f[1] = faces_[SortedFace(v[2], v[3], v[6])];
    f[2] = faces_[SortedFace(v[0], v[2], v[3])];
    f[3] = faces_[SortedFace(v[0], v[3], v[6])];
    hf[0] = mesh_->halfface_handle(f[0], 0);
    hf[1] = mesh_->halfface_handle(f[1], 1);
    hf[2] = mesh_->halfface_handle(f[2], 0);
    hf[3] = mesh_->halfface_handle(f[3], 0);
    mesh_->add_cell(hf);
}

void TetrahedralCuboidGenerator::add_cube_type_2_cells(std::size_t i, std::size_t j, std::size_t k,
283
        std::vector<OpenVolumeMesh::VertexHandle> const& v)
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
{
    std::vector<OpenVolumeMesh::FaceHandle> f(4);
    std::vector<OpenVolumeMesh::HalfFaceHandle> hf(4);

    // inner cell
    f[0] = faces_[SortedFace(v[1], v[2], v[4])];
    f[1] = faces_[SortedFace(v[1], v[4], v[7])];
    f[2] = faces_[SortedFace(v[1], v[2], v[7])];
    f[3] = faces_[SortedFace(v[2], v[4], v[7])];
    hf[0] = mesh_->halfface_handle(f[0], 1);
    hf[1] = mesh_->halfface_handle(f[1], 1);
    hf[2] = mesh_->halfface_handle(f[2], 1);
    hf[3] = mesh_->halfface_handle(f[3], 1);
    mesh_->add_cell(hf);

    f[0] = faces_[SortedFace(v[0], v[2], v[4])];
    f[1] = faces_[SortedFace(v[0], v[1], v[4])];
    f[2] = faces_[SortedFace(v[0], v[1], v[2])];
    f[3] = faces_[SortedFace(v[1], v[2], v[4])];
    hf[0] = mesh_->halfface_handle(f[0], 0);
    hf[1] = mesh_->halfface_handle(f[1], 0);
    hf[2] = mesh_->halfface_handle(f[2], 0);
    hf[3] = mesh_->halfface_handle(f[3], 0);
    mesh_->add_cell(hf);

    f[0] = faces_[SortedFace(v[1], v[5], v[7])];
    f[1] = faces_[SortedFace(v[1], v[4], v[5])];
    f[2] = faces_[SortedFace(v[4], v[5], v[7])];
    f[3] = faces_[SortedFace(v[1], v[4], v[7])];
    hf[0] = mesh_->halfface_handle(f[0], 1);
    hf[1] = mesh_->halfface_handle(f[1], 0);
    hf[2] = mesh_->halfface_handle(f[2], 1);
    hf[3] = mesh_->halfface_handle(f[3], 0);
    mesh_->add_cell(hf);

    f[0] = faces_[SortedFace(v[1], v[3], v[7])];
    f[1] = faces_[SortedFace(v[2], v[3], v[7])];
    f[2] = faces_[SortedFace(v[1], v[2], v[3])];
    f[3] = faces_[SortedFace(v[1], v[2], v[7])];
    hf[0] = mesh_->halfface_handle(f[0], 1);
    hf[1] = mesh_->halfface_handle(f[1], 1);
    hf[2] = mesh_->halfface_handle(f[2], 0);
    hf[3] = mesh_->halfface_handle(f[3], 0);
    mesh_->add_cell(hf);

    f[0] = faces_[SortedFace(v[2], v[4], v[6])];
    f[1] = faces_[SortedFace(v[2], v[6], v[7])];
    f[2] = faces_[SortedFace(v[4], v[6], v[7])];
    f[3] = faces_[SortedFace(v[2], v[4], v[7])];
    hf[0] = mesh_->halfface_handle(f[0], 0);
    hf[1] = mesh_->halfface_handle(f[1], 1);
    hf[2] = mesh_->halfface_handle(f[2], 1);
    hf[3] = mesh_->halfface_handle(f[3], 0);
    mesh_->add_cell(hf);
}

void TetrahedralCuboidGenerator::generate(PolyhedralMesh& mesh, Vector const& position,
        Vector const& length, unsigned const n_x, unsigned const n_y, unsigned const n_z)
{
    mesh_ = &mesh;
    mesh_->clear();

    size_[0] = n_x;
    size_[1] = n_y;
    size_[2] = n_z;

    add_vertices(position, length);
    add_faces();
    add_cells();

    vertices_.clear();
    faces_.clear();
}

#endif