GCC Code Coverage Report

Directory: ./
File: openvdb/openvdb/unittest/TestLevelSetUtil.cc
Date: 2022-07-25 17:40:05
Exec Total Coverage
Lines: 94 94 100.0%
Functions: 4 4 100.0%
Branches: 106 594 17.8%
Line Branch Exec Source
1 // Copyright Contributors to the OpenVDB Project
2 // SPDX-License-Identifier: MPL-2.0
3
4 #include <openvdb/openvdb.h>
5 #include <openvdb/Exceptions.h>
6 #include <openvdb/tools/LevelSetUtil.h>
7 #include <openvdb/tools/MeshToVolume.h> // for createLevelSetBox()
8 #include <openvdb/tools/Composite.h> // for csgDifference()
9
10 #include <gtest/gtest.h>
11
12 #include <vector>
13
14
15 4 class TestLevelSetUtil: public ::testing::Test
16 {
17 };
18
19
20 ////////////////////////////////////////
21
22
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 1 TEST_F(TestLevelSetUtil, testSDFToFogVolume)
23 {
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 1 openvdb::FloatGrid::Ptr grid = openvdb::FloatGrid::create(10.0);
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26
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 2 grid->fill(openvdb::CoordBBox(openvdb::Coord(-100), openvdb::Coord(100)), 9.0);
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 2 grid->fill(openvdb::CoordBBox(openvdb::Coord(-50), openvdb::Coord(50)), -9.0);
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 1 openvdb::tools::sdfToFogVolume(*grid);
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 1 EXPECT_TRUE(grid->background() < 1e-7);
33
34 openvdb::FloatGrid::ValueOnIter iter = grid->beginValueOn();
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 147294 for (; iter; ++iter) {
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 147293 EXPECT_TRUE(iter.getValue() > 0.0);
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 147293 EXPECT_TRUE(std::abs(iter.getValue() - 1.0) < 1e-7);
38 }
39 1 }
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41
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 2 TEST_F(TestLevelSetUtil, testSDFInteriorMask)
43 {
44 typedef openvdb::FloatGrid FloatGrid;
45 typedef openvdb::BoolGrid BoolGrid;
46 typedef openvdb::Vec3s Vec3s;
47 typedef openvdb::math::BBox<Vec3s> BBoxs;
48 typedef openvdb::math::Transform Transform;
49
50 1 BBoxs bbox(Vec3s(0.0, 0.0, 0.0), Vec3s(1.0, 1.0, 1.0));
51
52 1 Transform::Ptr transform = Transform::createLinearTransform(0.1);
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 1 FloatGrid::Ptr sdfGrid = openvdb::tools::createLevelSetBox<FloatGrid>(bbox, *transform);
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 1 BoolGrid::Ptr maskGrid = openvdb::tools::sdfInteriorMask(*sdfGrid);
57
58 // test inside coord value
59
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 1 openvdb::Coord ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(0.5, 0.5, 0.5));
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 1 EXPECT_TRUE(maskGrid->tree().getValue(ijk) == true);
61
62 // test outside coord value
63
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 1 ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(1.5, 1.5, 1.5));
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 1 EXPECT_TRUE(maskGrid->tree().getValue(ijk) == false);
65 1 }
66
67
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 2 TEST_F(TestLevelSetUtil, testExtractEnclosedRegion)
69 {
70 typedef openvdb::FloatGrid FloatGrid;
71 typedef openvdb::BoolGrid BoolGrid;
72 typedef openvdb::Vec3s Vec3s;
73 typedef openvdb::math::BBox<Vec3s> BBoxs;
74 typedef openvdb::math::Transform Transform;
75
76 1 BBoxs regionA(Vec3s(0.0f, 0.0f, 0.0f), Vec3s(3.0f, 3.0f, 3.0f));
77 1 BBoxs regionB(Vec3s(1.0f, 1.0f, 1.0f), Vec3s(2.0f, 2.0f, 2.0f));
78
79 1 Transform::Ptr transform = Transform::createLinearTransform(0.1);
80
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 1 FloatGrid::Ptr sdfGrid = openvdb::tools::createLevelSetBox<FloatGrid>(regionA, *transform);
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 1 FloatGrid::Ptr sdfGridB = openvdb::tools::createLevelSetBox<FloatGrid>(regionB, *transform);
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 1 openvdb::tools::csgDifference(*sdfGrid, *sdfGridB);
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 1 BoolGrid::Ptr maskGrid = openvdb::tools::extractEnclosedRegion(*sdfGrid);
87
88 // test inside ls region coord value
89
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 1 openvdb::Coord ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(1.5, 1.5, 1.5));
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 1 EXPECT_TRUE(maskGrid->tree().getValue(ijk) == true);
91
92 // test outside coord value
93
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 1 ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(3.5, 3.5, 3.5));
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 1 EXPECT_TRUE(maskGrid->tree().getValue(ijk) == false);
95 1 }
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 2 TEST_F(TestLevelSetUtil, testSegmentationTools)
99 {
100 typedef openvdb::FloatGrid FloatGrid;
101 typedef openvdb::Vec3s Vec3s;
102 typedef openvdb::math::BBox<Vec3s> BBoxs;
103 typedef openvdb::math::Transform Transform;
104
105 { // Test SDF segmentation
106
107 // Create two sdf boxes with overlapping narrow-bands.
108 1 BBoxs regionA(Vec3s(0.0f, 0.0f, 0.0f), Vec3s(2.0f, 2.0f, 2.0f));
109 1 BBoxs regionB(Vec3s(2.5f, 0.0f, 0.0f), Vec3s(4.3f, 2.0f, 2.0f));
110
111 1 Transform::Ptr transform = Transform::createLinearTransform(0.1);
112
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 1 FloatGrid::Ptr sdfGrid = openvdb::tools::createLevelSetBox<FloatGrid>(regionA, *transform);
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 1 FloatGrid::Ptr sdfGridB = openvdb::tools::createLevelSetBox<FloatGrid>(regionB, *transform);
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 1 openvdb::tools::csgUnion(*sdfGrid, *sdfGridB);
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118 1 std::vector<FloatGrid::Ptr> segments;
119
120 // This tool will not identify two separate segments when the narrow-bands overlap.
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 1 openvdb::tools::segmentActiveVoxels(*sdfGrid, segments);
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 1 EXPECT_TRUE(segments.size() == 1);
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124 segments.clear();
125
126 // This tool should properly identify two separate segments
127
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 1 openvdb::tools::segmentSDF(*sdfGrid, segments);
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 1 EXPECT_TRUE(segments.size() == 2);
129
130
131 // test inside ls region coord value
132
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 1 openvdb::Coord ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(1.5, 1.5, 1.5));
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 1 EXPECT_TRUE(segments[0]->tree().getValue(ijk) < 0.0f);
134
135 // test outside coord value
136
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 1 ijk = transform->worldToIndexNodeCentered(openvdb::Vec3d(3.5, 3.5, 3.5));
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 1 EXPECT_TRUE(segments[0]->tree().getValue(ijk) > 0.0f);
138 }
139
140 { // Test empty SDF grid
141
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 1 FloatGrid::Ptr sdfGrid = openvdb::FloatGrid::create(/*background=*/10.2f);
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 1 sdfGrid->setGridClass(openvdb::GRID_LEVEL_SET);
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145 1 std::vector<FloatGrid::Ptr> segments;
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 1 openvdb::tools::segmentSDF(*sdfGrid, segments);
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 1 EXPECT_EQ(size_t(1), segments.size());
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 1 EXPECT_EQ(openvdb::Index32(0), segments[0]->tree().leafCount());
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 1 EXPECT_EQ(10.2f, segments[0]->background());
151 }
152
153 { // Test SDF grid with inactive leaf nodes
154
155 1 BBoxs bbox(Vec3s(0.0, 0.0, 0.0), Vec3s(1.0, 1.0, 1.0));
156 1 Transform::Ptr transform = Transform::createLinearTransform(0.1);
157 FloatGrid::Ptr sdfGrid = openvdb::tools::createLevelSetBox<FloatGrid>(bbox, *transform,
158
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 1 /*halfwidth=*/5);
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 1 EXPECT_TRUE(sdfGrid->tree().activeVoxelCount() > openvdb::Index64(0));
161
162 // make all active voxels inactive
163
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 28 for (auto leaf = sdfGrid->tree().beginLeaf(); leaf; ++leaf) {
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 6233 for (auto iter = leaf->beginValueOn(); iter; ++iter) {
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 6206 leaf->setValueOff(iter.getCoord());
167 }
168 }
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 1 EXPECT_EQ(openvdb::Index64(0), sdfGrid->tree().activeVoxelCount());
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172 1 std::vector<FloatGrid::Ptr> segments;
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 1 openvdb::tools::segmentSDF(*sdfGrid, segments);
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 1 EXPECT_EQ(size_t(1), segments.size());
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 1 EXPECT_EQ(openvdb::Index32(0), segments[0]->tree().leafCount());
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 1 EXPECT_EQ(sdfGrid->background(), segments[0]->background());
178 }
179
180 { // Test fog volume with active tiles
181
182
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 1 openvdb::FloatGrid::Ptr grid = openvdb::FloatGrid::create(0.0);
183
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 2 grid->fill(openvdb::CoordBBox(openvdb::Coord(0), openvdb::Coord(50)), 1.0);
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 2 grid->fill(openvdb::CoordBBox(openvdb::Coord(60), openvdb::Coord(100)), 1.0);
186
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 1 EXPECT_TRUE(grid->tree().hasActiveTiles() == true);
188
189 1 std::vector<FloatGrid::Ptr> segments;
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 1 openvdb::tools::segmentActiveVoxels(*grid, segments);
191
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 1 EXPECT_EQ(size_t(2), segments.size());
192 }
193
194 { // Test an empty fog volume
195
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 1 openvdb::FloatGrid::Ptr grid = openvdb::FloatGrid::create(/*background=*/3.1f);
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 1 EXPECT_EQ(openvdb::Index32(0), grid->tree().leafCount());
199
200 1 std::vector<FloatGrid::Ptr> segments;
201
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 1 openvdb::tools::segmentActiveVoxels(*grid, segments);
202
203 // note that an empty volume should segment into an empty volume
204
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 1 EXPECT_EQ(size_t(1), segments.size());
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 1 EXPECT_EQ(openvdb::Index32(0), segments[0]->tree().leafCount());
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 1 EXPECT_EQ(3.1f, segments[0]->background());
207 }
208
209 { // Test fog volume with two inactive leaf nodes
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 1 openvdb::FloatGrid::Ptr grid = openvdb::FloatGrid::create(0.0);
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 1 grid->tree().touchLeaf(openvdb::Coord(0,0,0));
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 1 grid->tree().touchLeaf(openvdb::Coord(100,100,100));
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 1 EXPECT_EQ(openvdb::Index32(2), grid->tree().leafCount());
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 1 EXPECT_EQ(openvdb::Index64(0), grid->tree().activeVoxelCount());
218
219 1 std::vector<FloatGrid::Ptr> segments;
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 1 openvdb::tools::segmentActiveVoxels(*grid, segments);
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 1 EXPECT_EQ(size_t(1), segments.size());
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 1 EXPECT_EQ(openvdb::Index32(0), segments[0]->tree().leafCount());
224 }
225 1 }
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227