GCC Code Coverage Report


Directory: ./
File: openvdb/openvdb/unittest/TestMaps.cc
Date: 2022-07-25 17:40:05
Exec Total Coverage
Lines: 323 323 100.0%
Functions: 11 11 100.0%
Branches: 324 2690 12.0%

Line Branch Exec Source
1 // Copyright Contributors to the OpenVDB Project
2 // SPDX-License-Identifier: MPL-2.0
3
4 #include <openvdb/Exceptions.h>
5 #include <openvdb/math/Maps.h>
6 #include <openvdb/util/MapsUtil.h>
7 #include "gtest/gtest.h"
8
9
10 11 class TestMaps: public ::testing::Test
11 {
12 };
13
14
15 // Work-around for a macro expansion bug in debug mode that presents as an
16 // undefined reference linking error. This happens in cases where template
17 // instantiation of a type trait is prevented from occurring as the template
18 // instantiation is deemed to be in an unreachable code block.
19 // The work-around is to wrap the EXPECT_TRUE macro in another which holds
20 // the expected value in a temporary.
21 #define EXPECT_TRUE_TEMP(expected) \
22 { bool result = expected; EXPECT_TRUE(result); }
23
24
25
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1 TEST_F(TestMaps, testApproxInverse)
26 {
27 using namespace openvdb::math;
28
29 1 Mat4d singular = Mat4d::identity();
30 1 singular[1][1] = 0.f;
31 {
32 1 Mat4d singularInv = approxInverse(singular);
33
34
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1 EXPECT_TRUE( singular == singularInv );
35 }
36 {
37 1 Mat4d rot = Mat4d::identity();
38 rot.setToRotation(X_AXIS, M_PI/4.);
39
40 1 Mat4d rotInv = rot.inverse();
41 1 Mat4d mat = rotInv * singular * rot;
42
43 1 Mat4d singularInv = approxInverse(mat);
44
45 // this matrix is equal to its own singular inverse
46
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1 EXPECT_TRUE( mat.eq(singularInv) );
47
48 }
49 {
50 1 Mat4d m = Mat4d::identity();
51 1 m[0][1] = 1;
52
53 // should give true inverse, since this matrix has det=1
54 1 Mat4d minv = approxInverse(m);
55
56 1 Mat4d prod = m * minv;
57
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2 EXPECT_TRUE( prod.eq( Mat4d::identity() ) );
58 }
59 {
60 1 Mat4d m = Mat4d::identity();
61 1 m[0][1] = 1;
62 1 m[1][1] = 0;
63 // should give true inverse, since this matrix has det=1
64 1 Mat4d minv = approxInverse(m);
65
66 1 Mat4d expected = Mat4d::zero();
67 1 expected[3][3] = 1;
68
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1 EXPECT_TRUE( minv.eq(expected ) );
69 }
70
71
72 1 }
73
74
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1 TEST_F(TestMaps, testUniformScale)
76 {
77 using namespace openvdb::math;
78
79 1 AffineMap map;
80
81
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1 EXPECT_TRUE(map.hasUniformScale());
82
83 // Apply uniform scale: should still have square voxels
84 1 map.accumPreScale(Vec3d(2, 2, 2));
85
86
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1 EXPECT_TRUE(map.hasUniformScale());
87
88 // Apply a rotation, should still have squaure voxels.
89 map.accumPostRotation(X_AXIS, 2.5);
90
91
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1 EXPECT_TRUE(map.hasUniformScale());
92
93 // non uniform scaling will stretch the voxels
94 1 map.accumPostScale(Vec3d(1, 3, 1) );
95
96
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1 EXPECT_TRUE(!map.hasUniformScale());
97 1 }
98
99
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2 TEST_F(TestMaps, testTranslation)
100 {
101 using namespace openvdb::math;
102
103 double TOL = 1e-7;
104
105
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2 TranslationMap::Ptr translation(new TranslationMap(Vec3d(1,1,1)));
106 EXPECT_TRUE_TEMP(is_linear<TranslationMap>::value);
107
108
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1 TranslationMap another_translation(Vec3d(1,1,1));
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1 EXPECT_TRUE(another_translation == *translation);
110
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2 TranslationMap::Ptr translate_by_two(new TranslationMap(Vec3d(2,2,2)));
112
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1 EXPECT_TRUE(*translate_by_two != *translation);
114
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1 EXPECT_NEAR(translate_by_two->determinant(), 1, TOL);
116
117 EXPECT_TRUE(translate_by_two->hasUniformScale());
118
119 /// apply the map forward
120 Vec3d unit(1,0,0);
121 Vec3d result = translate_by_two->applyMap(unit);
122
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1 EXPECT_NEAR(result(0), 3, TOL);
123
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1 EXPECT_NEAR(result(1), 2, TOL);
124
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1 EXPECT_NEAR(result(2), 2, TOL);
125
126 /// invert the map
127 result = translate_by_two->applyInverseMap(result);
128
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1 EXPECT_NEAR(result(0), 1, TOL);
129
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1 EXPECT_NEAR(result(1), 0, TOL);
130
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1 EXPECT_NEAR(result(2), 0, TOL);
131
132 /// Inverse Jacobian Transpose
133 result = translate_by_two->applyIJT(result);
134
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1 EXPECT_NEAR(result(0), 1, TOL);
135
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1 EXPECT_NEAR(result(1), 0, TOL);
136
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1 EXPECT_NEAR(result(2), 0, TOL);
137
138 /// Jacobian Transpose
139 1 result = translate_by_two->applyJT(translate_by_two->applyIJT(unit));
140
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1 EXPECT_NEAR(result(0), unit(0), TOL);
141
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1 EXPECT_NEAR(result(1), unit(1), TOL);
142
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1 EXPECT_NEAR(result(2), unit(2), TOL);
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144
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1 MapBase::Ptr inverse = translation->inverseMap();
146
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1 EXPECT_TRUE(inverse->type() == TranslationMap::mapType());
147 // apply the map forward and the inverse map back
148
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1 result = inverse->applyMap(translation->applyMap(unit));
149
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1 EXPECT_NEAR(result(0), 1, TOL);
150
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1 EXPECT_NEAR(result(1), 0, TOL);
151
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1 EXPECT_NEAR(result(2), 0, TOL);
152
153
154 1 }
155
156
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1 TEST_F(TestMaps, testScaleDefault)
157 {
158 using namespace openvdb::math;
159
160 double TOL = 1e-7;
161
162 // testing default constructor
163 // should be the identity
164 1 ScaleMap::Ptr scale(new ScaleMap());
165 Vec3d unit(1, 1, 1);
166
167 Vec3d result = scale->applyMap(unit);
168
169
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1 EXPECT_NEAR(unit(0), result(0), TOL);
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1 EXPECT_NEAR(unit(1), result(1), TOL);
171
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1 EXPECT_NEAR(unit(2), result(2), TOL);
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173 1 result = scale->applyInverseMap(unit);
174
175
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1 EXPECT_NEAR(unit(0), result(0), TOL);
176
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1 EXPECT_NEAR(unit(1), result(1), TOL);
177
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1 EXPECT_NEAR(unit(2), result(2), TOL);
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179
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1 MapBase::Ptr inverse = scale->inverseMap();
181
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1 EXPECT_TRUE(inverse->type() == ScaleMap::mapType());
182 // apply the map forward and the inverse map back
183
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1 result = inverse->applyMap(scale->applyMap(unit));
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1 EXPECT_NEAR(result(0), unit(0), TOL);
185
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1 EXPECT_NEAR(result(1), unit(1), TOL);
186
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1 EXPECT_NEAR(result(2), unit(2), TOL);
187
188
189 1 }
190
191
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2 TEST_F(TestMaps, testRotation)
192 {
193 using namespace openvdb::math;
194
195 double TOL = 1e-7;
196
197 double pi = 4.*atan(1.);
198
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2 UnitaryMap::Ptr rotation(new UnitaryMap(Vec3d(1,0,0), pi/2));
199
200 EXPECT_TRUE_TEMP(is_linear<UnitaryMap>::value);
201
202
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1 UnitaryMap another_rotation(Vec3d(1,0,0), pi/2.);
203
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1 EXPECT_TRUE(another_rotation == *rotation);
204
205
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2 UnitaryMap::Ptr rotation_two(new UnitaryMap(Vec3d(1,0,0), pi/4.));
206
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1 EXPECT_TRUE(*rotation_two != *rotation);
208
209
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1 EXPECT_NEAR(rotation->determinant(), 1, TOL);
210
211 EXPECT_TRUE(rotation_two->hasUniformScale());
212
213 /// apply the map forward
214 Vec3d unit(0,1,0);
215 Vec3d result = rotation->applyMap(unit);
216
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1 EXPECT_NEAR(0, result(0), TOL);
217
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1 EXPECT_NEAR(0, result(1), TOL);
218
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1 EXPECT_NEAR(1, result(2), TOL);
219
220 /// invert the map
221 1 result = rotation->applyInverseMap(result);
222
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1 EXPECT_NEAR(0, result(0), TOL);
223
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1 EXPECT_NEAR(1, result(1), TOL);
224
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1 EXPECT_NEAR(0, result(2), TOL);
225
226 /// Inverse Jacobian Transpose
227 1 result = rotation_two->applyIJT(result); // rotate backwards
228
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1 EXPECT_NEAR(0, result(0), TOL);
229
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1 EXPECT_NEAR(sqrt(2.)/2, result(1), TOL);
230
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1 EXPECT_NEAR(sqrt(2.)/2, result(2), TOL);
231
232 /// Jacobian Transpose
233 1 result = rotation_two->applyJT(rotation_two->applyIJT(unit));
234
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1 EXPECT_NEAR(result(0), unit(0), TOL);
235
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1 EXPECT_NEAR(result(1), unit(1), TOL);
236
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1 EXPECT_NEAR(result(2), unit(2), TOL);
237
238
239 // Test inverse map
240
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1 MapBase::Ptr inverse = rotation->inverseMap();
241
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1 EXPECT_TRUE(inverse->type() == UnitaryMap::mapType());
242 // apply the map forward and the inverse map back
243
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1 result = inverse->applyMap(rotation->applyMap(unit));
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1 EXPECT_NEAR(result(0), unit(0), TOL);
245
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1 EXPECT_NEAR(result(1), unit(1), TOL);
246
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1 EXPECT_NEAR(result(2), unit(2), TOL);
247 1 }
248
249
250
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2 TEST_F(TestMaps, testScaleTranslate)
251 {
252 using namespace openvdb::math;
253
254 double TOL = 1e-7;
255
256 EXPECT_TRUE_TEMP(is_linear<ScaleTranslateMap>::value);
257
258
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2 TranslationMap::Ptr translation(new TranslationMap(Vec3d(1,1,1)));
259
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2 ScaleMap::Ptr scale(new ScaleMap(Vec3d(1,2,3)));
260
261 ScaleTranslateMap::Ptr scaleAndTranslate(
262
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1 new ScaleTranslateMap(*scale, *translation));
263
264 1 TranslationMap translate_by_two(Vec3d(2,2,2));
265 1 ScaleTranslateMap another_scaleAndTranslate(*scale, translate_by_two);
266
267
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1 EXPECT_TRUE(another_scaleAndTranslate != *scaleAndTranslate);
268
269
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1 EXPECT_TRUE(!scaleAndTranslate->hasUniformScale());
270 //EXPECT_NEAR(scaleAndTranslate->determinant(), 6, TOL);
271
272 /// apply the map forward
273 Vec3d unit(1,0,0);
274 Vec3d result = scaleAndTranslate->applyMap(unit);
275
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1 EXPECT_NEAR(2, result(0), TOL);
276
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1 EXPECT_NEAR(1, result(1), TOL);
277
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1 EXPECT_NEAR(1, result(2), TOL);
278
279 /// invert the map
280 result = scaleAndTranslate->applyInverseMap(result);
281
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1 EXPECT_NEAR(1, result(0), TOL);
282
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1 EXPECT_NEAR(0, result(1), TOL);
283
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1 EXPECT_NEAR(0, result(2), TOL);
284
285 /// Inverse Jacobian Transpose
286 result = Vec3d(0,2,0);
287 result = scaleAndTranslate->applyIJT(result );
288
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1 EXPECT_NEAR(0, result(0), TOL);
289
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1 EXPECT_NEAR(1, result(1), TOL);
290
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1 EXPECT_NEAR(0, result(2), TOL);
291
292
293 /// Jacobian Transpose
294 1 result = scaleAndTranslate->applyJT(scaleAndTranslate->applyIJT(unit));
295
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1 EXPECT_NEAR(result(0), unit(0), TOL);
296
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1 EXPECT_NEAR(result(1), unit(1), TOL);
297
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1 EXPECT_NEAR(result(2), unit(2), TOL);
298
299
300 // Test inverse map
301
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1 MapBase::Ptr inverse = scaleAndTranslate->inverseMap();
302
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1 EXPECT_TRUE(inverse->type() == ScaleTranslateMap::mapType());
303 // apply the map forward and the inverse map back
304
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1 result = inverse->applyMap(scaleAndTranslate->applyMap(unit));
305
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1 EXPECT_NEAR(result(0), unit(0), TOL);
306
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1 EXPECT_NEAR(result(1), unit(1), TOL);
307
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1 EXPECT_NEAR(result(2), unit(2), TOL);
308
309 1 }
310
311
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2 TEST_F(TestMaps, testUniformScaleTranslate)
313 {
314 using namespace openvdb::math;
315
316 double TOL = 1e-7;
317
318 EXPECT_TRUE_TEMP(is_linear<UniformScaleMap>::value);
319 EXPECT_TRUE_TEMP(is_linear<UniformScaleTranslateMap>::value);
320
321
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1 TranslationMap::Ptr translation(new TranslationMap(Vec3d(1,1,1)));
322
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1 UniformScaleMap::Ptr scale(new UniformScaleMap(2));
323
324 UniformScaleTranslateMap::Ptr scaleAndTranslate(
325
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1 new UniformScaleTranslateMap(*scale, *translation));
326
327
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1 TranslationMap translate_by_two(Vec3d(2,2,2));
328 UniformScaleTranslateMap another_scaleAndTranslate(*scale, translate_by_two);
329
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1 EXPECT_TRUE(another_scaleAndTranslate != *scaleAndTranslate);
331
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1 EXPECT_TRUE(scaleAndTranslate->hasUniformScale());
332 //EXPECT_NEAR(scaleAndTranslate->determinant(), 6, TOL);
333
334 /// apply the map forward
335 Vec3d unit(1,0,0);
336 Vec3d result = scaleAndTranslate->applyMap(unit);
337
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1 EXPECT_NEAR(3, result(0), TOL);
338
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1 EXPECT_NEAR(1, result(1), TOL);
339
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1 EXPECT_NEAR(1, result(2), TOL);
340
341 /// invert the map
342 result = scaleAndTranslate->applyInverseMap(result);
343
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1 EXPECT_NEAR(1, result(0), TOL);
344
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1 EXPECT_NEAR(0, result(1), TOL);
345
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1 EXPECT_NEAR(0, result(2), TOL);
346
347 /// Inverse Jacobian Transpose
348 result = Vec3d(0,2,0);
349 result = scaleAndTranslate->applyIJT(result );
350
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1 EXPECT_NEAR(0, result(0), TOL);
351
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1 EXPECT_NEAR(1, result(1), TOL);
352
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1 EXPECT_NEAR(0, result(2), TOL);
353
354
355 /// Jacobian Transpose
356 1 result = scaleAndTranslate->applyJT(scaleAndTranslate->applyIJT(unit));
357
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1 EXPECT_NEAR(result(0), unit(0), TOL);
358
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1 EXPECT_NEAR(result(1), unit(1), TOL);
359
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1 EXPECT_NEAR(result(2), unit(2), TOL);
360
361
362
363 // Test inverse map
364
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1 MapBase::Ptr inverse = scaleAndTranslate->inverseMap();
365
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1 EXPECT_TRUE(inverse->type() == UniformScaleTranslateMap::mapType());
366 // apply the map forward and the inverse map back
367
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1 result = inverse->applyMap(scaleAndTranslate->applyMap(unit));
368
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1 EXPECT_NEAR(result(0), unit(0), TOL);
369
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1 EXPECT_NEAR(result(1), unit(1), TOL);
370
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1 EXPECT_NEAR(result(2), unit(2), TOL);
371
372 1 }
373
374
375
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1 TEST_F(TestMaps, testDecomposition)
376 {
377 using namespace openvdb::math;
378
379 //double TOL = 1e-7;
380
381 EXPECT_TRUE_TEMP(is_linear<UnitaryMap>::value);
382 EXPECT_TRUE_TEMP(is_linear<SymmetricMap>::value);
383 EXPECT_TRUE_TEMP(is_linear<PolarDecomposedMap>::value);
384 EXPECT_TRUE_TEMP(is_linear<FullyDecomposedMap>::value);
385
386 1 Mat4d matrix(Mat4d::identity());
387 Vec3d input_translation(0,0,1);
388 matrix.setTranslation(input_translation);
389
390
391 1 matrix(0,0) = 1.8930039;
392 1 matrix(1,0) = -0.120080537;
393 1 matrix(2,0) = -0.497615212;
394
395 1 matrix(0,1) = -0.120080537;
396 1 matrix(1,1) = 2.643265436;
397 1 matrix(2,1) = 0.6176957495;
398
399 1 matrix(0,2) = -0.497615212;
400 1 matrix(1,2) = 0.6176957495;
401 1 matrix(2,2) = 1.4637305884;
402
403 1 FullyDecomposedMap::Ptr decomp = createFullyDecomposedMap(matrix);
404
405 /// the singular values
406 const Vec3<double>& singular_values =
407 decomp->firstMap().firstMap().secondMap().getScale();
408 /// expected values
409 Vec3d expected_values(2, 3, 1);
410
411
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1 EXPECT_TRUE( isApproxEqual(singular_values, expected_values) );
412
413 const Vec3<double>& the_translation = decomp->secondMap().secondMap().getTranslation();
414
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1 EXPECT_TRUE( isApproxEqual(the_translation, input_translation));
415 1 }
416
417
418
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2 TEST_F(TestMaps, testFrustum)
419 {
420 using namespace openvdb::math;
421
422 1 openvdb::BBoxd bbox(Vec3d(0), Vec3d(100));
423 NonlinearFrustumMap frustum(bbox, 1./6., 5);
424 /// frustum will have depth, far plane - near plane = 5
425 /// the frustum has width 1 in the front and 6 in the back
426
427 Vec3d trans(2,2,2);
428 NonlinearFrustumMap::Ptr map =
429 openvdb::StaticPtrCast<NonlinearFrustumMap, MapBase>(
430
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3 frustum.preScale(Vec3d(10,10,10))->postTranslate(trans));
431
432 EXPECT_TRUE(!map->hasUniformScale());
433
434 Vec3d result;
435 1 result = map->voxelSize();
436
437
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1 EXPECT_TRUE( isApproxEqual(result.x(), 0.1));
438
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1 EXPECT_TRUE( isApproxEqual(result.y(), 0.1));
439
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1 EXPECT_TRUE( isApproxEqual(result.z(), 0.5, 0.0001));
440 //--------- Front face
441 Vec3d corner(0,0,0);
442 1 result = map->applyMap(corner);
443
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1 EXPECT_TRUE(isApproxEqual(result, Vec3d(-5, -5, 0) + trans));
444
445 1 corner = Vec3d(100,0,0);
446 1 result = map->applyMap(corner);
447
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1 EXPECT_TRUE( isApproxEqual(result, Vec3d(5, -5, 0) + trans));
448
449 1 corner = Vec3d(0,100,0);
450 1 result = map->applyMap(corner);
451
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1 EXPECT_TRUE( isApproxEqual(result, Vec3d(-5, 5, 0) + trans));
452
453 1 corner = Vec3d(100,100,0);
454 1 result = map->applyMap(corner);
455
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1 EXPECT_TRUE( isApproxEqual(result, Vec3d(5, 5, 0) + trans));
456
457 //--------- Back face
458 1 corner = Vec3d(0,0,100);
459 1 result = map->applyMap(corner);
460
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1 EXPECT_TRUE( isApproxEqual(result, Vec3d(-30, -30, 50) + trans)); // 10*(5/2 + 1/2) = 30
461
462 1 corner = Vec3d(100,0,100);
463 1 result = map->applyMap(corner);
464
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1 EXPECT_TRUE( isApproxEqual(result, Vec3d(30, -30, 50) + trans));
465
466 1 corner = Vec3d(0,100,100);
467 1 result = map->applyMap(corner);
468
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1 EXPECT_TRUE( isApproxEqual(result, Vec3d(-30, 30, 50) + trans));
469
470 1 corner = Vec3d(100,100,100);
471 1 result = map->applyMap(corner);
472
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1 EXPECT_TRUE( isApproxEqual(result, Vec3d(30, 30, 50) + trans));
473
474
475 // invert a single corner
476
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1 result = map->applyInverseMap(Vec3d(30,30,50) + trans);
477
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1 EXPECT_TRUE( isApproxEqual(result, Vec3d(100, 100, 100)));
478
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1 EXPECT_TRUE(map->hasSimpleAffine());
480
481 /// create a frustum from from camera type information
482
483 // the location of the camera
484 Vec3d position(100,10,1);
485 // the direction the camera is pointing
486 Vec3d direction(0,1,1);
487 1 direction.normalize();
488
489 // the up-direction for the camera
490 Vec3d up(10,3,-3);
491
492 // distance from camera to near-plane measured in the direction 'direction'
493 double z_near = 100.;
494 // depth of frustum to far-plane to near-plane
495 double depth = 500.;
496 //aspect ratio of frustum: width/height
497 double aspect = 2;
498
499 // voxel count in frustum. the y_count = x_count / aspect
500 Coord::ValueType x_count = 500;
501 Coord::ValueType z_count = 5000;
502
503
504 NonlinearFrustumMap frustumMap_from_camera(
505
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1 position, direction, up, aspect, z_near, depth, x_count, z_count);
506 Vec3d center;
507 // find the center of the near plane and make sure it is in the correct place
508 1 center = Vec3d(0,0,0);
509 1 center += frustumMap_from_camera.applyMap(Vec3d(0,0,0));
510 1 center += frustumMap_from_camera.applyMap(Vec3d(500,0,0));
511 1 center += frustumMap_from_camera.applyMap(Vec3d(0,250,0));
512
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1 center += frustumMap_from_camera.applyMap(Vec3d(500,250,0));
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1 center = center /4.;
514
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1 EXPECT_TRUE( isApproxEqual(center, position + z_near * direction));
515 // find the center of the far plane and make sure it is in the correct place
516 1 center = Vec3d(0,0,0);
517 1 center += frustumMap_from_camera.applyMap(Vec3d( 0, 0,5000));
518 1 center += frustumMap_from_camera.applyMap(Vec3d(500, 0,5000));
519 1 center += frustumMap_from_camera.applyMap(Vec3d( 0,250,5000));
520
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1 center += frustumMap_from_camera.applyMap(Vec3d(500,250,5000));
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1 center = center /4.;
522
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1 EXPECT_TRUE( isApproxEqual(center, position + (z_near+depth) * direction));
523 // check that the frustum has the correct heigh on the near plane
524 1 Vec3d corner1 = frustumMap_from_camera.applyMap(Vec3d(0,0,0));
525
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1 Vec3d corner2 = frustumMap_from_camera.applyMap(Vec3d(0,250,0));
526 Vec3d side = corner2-corner1;
527
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1 EXPECT_TRUE( isApproxEqual( side.length(), 2 * up.length()));
528 // check that the frustum is correctly oriented w.r.t up
529 1 side.normalize();
530
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1 EXPECT_TRUE( isApproxEqual( side * (up.length()), up));
531 // check that the linear map inside the frustum is a simple affine map (i.e. has no shear)
532
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1 EXPECT_TRUE(frustumMap_from_camera.hasSimpleAffine());
533 1 }
534
535
536
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2 TEST_F(TestMaps, testCalcBoundingBox)
537 {
538 using namespace openvdb::math;
539
540 1 openvdb::BBoxd world_bbox(Vec3d(0,0,0), Vec3d(1,1,1));
541 openvdb::BBoxd voxel_bbox;
542 openvdb::BBoxd expected;
543 {
544 1 AffineMap affine;
545 1 affine.accumPreScale(Vec3d(2,2,2));
546
547 1 openvdb::util::calculateBounds<AffineMap>(affine, world_bbox, voxel_bbox);
548
549
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1 expected = openvdb::BBoxd(Vec3d(0,0,0), Vec3d(0.5, 0.5, 0.5));
550
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.min(), expected.min()));
551
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.max(), expected.max()));
552
553 1 affine.accumPostTranslation(Vec3d(1,1,1));
554 1 openvdb::util::calculateBounds<AffineMap>(affine, world_bbox, voxel_bbox);
555
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1 expected = openvdb::BBoxd(Vec3d(-0.5,-0.5,-0.5), Vec3d(0, 0, 0));
556
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.min(), expected.min()));
557
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.max(), expected.max()));
558 }
559 {
560 1 AffineMap affine;
561 1 affine.accumPreScale(Vec3d(2,2,2));
562 1 affine.accumPostTranslation(Vec3d(1,1,1));
563 // test a sphere:
564 Vec3d center(0,0,0);
565 double radius = 10;
566
567 1 openvdb::util::calculateBounds<AffineMap>(affine, center, radius, voxel_bbox);
568
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1 expected = openvdb::BBoxd(Vec3d(-5.5,-5.5,-5.5), Vec3d(4.5, 4.5, 4.5));
569
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.min(), expected.min()));
570
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.max(), expected.max()));
571 }
572 {
573 1 AffineMap affine;
574 1 affine.accumPreScale(Vec3d(2,2,2));
575 double pi = 4.*atan(1.);
576 affine.accumPreRotation(X_AXIS, pi/4.);
577 Vec3d center(0,0,0);
578 double radius = 10;
579
580 1 openvdb::util::calculateBounds<AffineMap>(affine, center, radius, voxel_bbox);
581
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1 expected = openvdb::BBoxd(Vec3d(-5,-5,-5), Vec3d(5, 5, 5));
582
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.min(), expected.min()));
583
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.max(), expected.max()));
584 }
585 {
586 1 AffineMap affine;
587 1 affine.accumPreScale(Vec3d(2,1,1));
588 double pi = 4.*atan(1.);
589 affine.accumPreRotation(X_AXIS, pi/4.);
590 Vec3d center(0,0,0);
591 double radius = 10;
592
593 1 openvdb::util::calculateBounds<AffineMap>(affine, center, radius, voxel_bbox);
594
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1 expected = openvdb::BBoxd(Vec3d(-5,-10,-10), Vec3d(5, 10, 10));
595
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.min(), expected.min()));
596
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.max(), expected.max()));
597 }
598 {
599 1 AffineMap affine;
600 1 affine.accumPreScale(Vec3d(2,1,1));
601 double pi = 4.*atan(1.);
602 affine.accumPreRotation(X_AXIS, pi/4.);
603 1 affine.accumPostTranslation(Vec3d(1,1,1));
604 Vec3d center(1,1,1);
605 double radius = 10;
606
607 1 openvdb::util::calculateBounds<AffineMap>(affine, center, radius, voxel_bbox);
608
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1 expected = openvdb::BBoxd(Vec3d(-5,-10,-10), Vec3d(5, 10, 10));
609
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.min(), expected.min()));
610
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1 EXPECT_TRUE(isApproxEqual(voxel_bbox.max(), expected.max()));
611 }
612 {
613 1 openvdb::BBoxd bbox(Vec3d(0), Vec3d(100));
614 NonlinearFrustumMap frustum(bbox, 2, 5);
615 NonlinearFrustumMap::Ptr map =
616 openvdb::StaticPtrCast<NonlinearFrustumMap, MapBase>(
617 2 frustum.preScale(Vec3d(2,2,2)));
618 Vec3d center(20,20,10);
619 double radius(1);
620
621 1 openvdb::util::calculateBounds<NonlinearFrustumMap>(*map, center, radius, voxel_bbox);
622 }
623 1 }
624
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1 TEST_F(TestMaps, testJacobians)
625 {
626 using namespace openvdb::math;
627 const double TOL = 1e-7;
628 {
629 1 AffineMap affine;
630
631 const int n = 10;
632 const double dtheta = M_PI / n;
633
634 const Vec3d test(1,2,3);
635 const Vec3d origin(0,0,0);
636
637
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11 for (int i = 0; i < n; ++i) {
638 10 double theta = i * dtheta;
639
640 affine.accumPostRotation(X_AXIS, theta);
641
642 Vec3d result = affine.applyJacobian(test);
643 10 Vec3d expected = affine.applyMap(test) - affine.applyMap(origin);
644
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10 EXPECT_NEAR(result(0), expected(0), TOL);
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10 EXPECT_NEAR(result(1), expected(1), TOL);
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10 EXPECT_NEAR(result(2), expected(2), TOL);
648
649 Vec3d tmp = affine.applyInverseJacobian(result);
650
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10 EXPECT_NEAR(tmp(0), test(0), TOL);
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10 EXPECT_NEAR(tmp(1), test(1), TOL);
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10 EXPECT_NEAR(tmp(2), test(2), TOL);
654 }
655 }
656
657 {
658 UniformScaleMap scale(3);
659 const Vec3d test(1,2,3);
660 const Vec3d origin(0,0,0);
661
662
663 Vec3d result = scale.applyJacobian(test);
664 Vec3d expected = scale.applyMap(test) - scale.applyMap(origin);
665
666
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1 EXPECT_NEAR(result(0), expected(0), TOL);
667
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1 EXPECT_NEAR(result(1), expected(1), TOL);
668
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1 EXPECT_NEAR(result(2), expected(2), TOL);
669
670 Vec3d tmp = scale.applyInverseJacobian(result);
671
672
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1 EXPECT_NEAR(tmp(0), test(0), TOL);
673
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1 EXPECT_NEAR(tmp(1), test(1), TOL);
674
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1 EXPECT_NEAR(tmp(2), test(2), TOL);
675 }
676
677 {
678 1 ScaleMap scale(Vec3d(1,2,3));
679 const Vec3d test(1,2,3);
680 const Vec3d origin(0,0,0);
681
682
683 Vec3d result = scale.applyJacobian(test);
684 Vec3d expected = scale.applyMap(test) - scale.applyMap(origin);
685
686
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1 EXPECT_NEAR(result(0), expected(0), TOL);
687
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1 EXPECT_NEAR(result(1), expected(1), TOL);
688
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1 EXPECT_NEAR(result(2), expected(2), TOL);
689
690 Vec3d tmp = scale.applyInverseJacobian(result);
691
692
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1 EXPECT_NEAR(tmp(0), test(0), TOL);
693
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1 EXPECT_NEAR(tmp(1), test(1), TOL);
694
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1 EXPECT_NEAR(tmp(2), test(2), TOL);
695 }
696 {
697
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1 TranslationMap map(Vec3d(1,2,3));
698 const Vec3d test(1,2,3);
699 const Vec3d origin(0,0,0);
700
701
702 Vec3d result = map.applyJacobian(test);
703 Vec3d expected = map.applyMap(test) - map.applyMap(origin);
704
705
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1 EXPECT_NEAR(result(0), expected(0), TOL);
706
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1 EXPECT_NEAR(result(1), expected(1), TOL);
707
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1 EXPECT_NEAR(result(2), expected(2), TOL);
708
709 Vec3d tmp = map.applyInverseJacobian(result);
710
711
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1 EXPECT_NEAR(tmp(0), test(0), TOL);
712
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1 EXPECT_NEAR(tmp(1), test(1), TOL);
713
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1 EXPECT_NEAR(tmp(2), test(2), TOL);
714 }
715 {
716 1 ScaleTranslateMap map(Vec3d(1,2,3), Vec3d(3,5,4));
717 const Vec3d test(1,2,3);
718 const Vec3d origin(0,0,0);
719
720
721 Vec3d result = map.applyJacobian(test);
722 Vec3d expected = map.applyMap(test) - map.applyMap(origin);
723
724
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1 EXPECT_NEAR(result(0), expected(0), TOL);
725
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1 EXPECT_NEAR(result(1), expected(1), TOL);
726
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1 EXPECT_NEAR(result(2), expected(2), TOL);
727
728 Vec3d tmp = map.applyInverseJacobian(result);
729
730
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1 EXPECT_NEAR(tmp(0), test(0), TOL);
731
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1 EXPECT_NEAR(tmp(1), test(1), TOL);
732
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1 EXPECT_NEAR(tmp(2), test(2), TOL);
733 }
734 {
735 1 openvdb::BBoxd bbox(Vec3d(0), Vec3d(100));
736 NonlinearFrustumMap frustum(bbox, 1./6., 5);
737 /// frustum will have depth, far plane - near plane = 5
738 /// the frustum has width 1 in the front and 6 in the back
739
740 Vec3d trans(2,2,2);
741 NonlinearFrustumMap::Ptr map =
742 openvdb::StaticPtrCast<NonlinearFrustumMap, MapBase>(
743
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3 frustum.preScale(Vec3d(10,10,10))->postTranslate(trans));
744
745 const Vec3d test(1,2,3);
746 const Vec3d origin(0, 0, 0);
747
748 // these two drop down to just the linear part
749 Vec3d lresult = map->applyJacobian(test);
750 Vec3d ltmp = map->applyInverseJacobian(lresult);
751
752
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1 EXPECT_NEAR(ltmp(0), test(0), TOL);
753
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1 EXPECT_NEAR(ltmp(1), test(1), TOL);
754
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1 EXPECT_NEAR(ltmp(2), test(2), TOL);
755
756 Vec3d isloc(4,5,6);
757 // these two drop down to just the linear part
758 1 Vec3d result = map->applyJacobian(test, isloc);
759 1 Vec3d tmp = map->applyInverseJacobian(result, isloc);
760
761
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1 EXPECT_NEAR(tmp(0), test(0), TOL);
762
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1 EXPECT_NEAR(tmp(1), test(1), TOL);
763
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1 EXPECT_NEAR(tmp(2), test(2), TOL);
764
765
766
767 }
768
769
770 1 }
771