GCC Code Coverage Report

Directory:	./
File:	openvdb/openvdb/unittest/TestQuantizedUnitVec.cc
Date:	2022-07-25 17:40:05

	Exec	Total	Coverage
Lines:	47	47	100.0%
Functions:	1	1	100.0%
Branches:	29	338	8.6%

  
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      // Copyright Contributors to the OpenVDB Project
    
      // SPDX-License-Identifier: MPL-2.0
    
      #include <openvdb/Exceptions.h>
    
      #include <openvdb/math/QuantizedUnitVec.h>
    
      #include <openvdb/math/Math.h>
    
      #include <openvdb/math/Vec3.h>
    
      #include <gtest/gtest.h>
    
      #include <sstream>
    
      #include <algorithm>
    
      #include <cmath>
    
      #include <ctime>
    
      1
      class TestQuantizedUnitVec: public ::testing::Test
    
      {
    
      protected:
    
          // Generate a random number in the range [0, 1].
    
      120000
          double randNumber() { return double(rand()) / (double(RAND_MAX) + 1.0); }
    
      };
    
      ////////////////////////////////////////
    
      namespace {
    
      const uint16_t
    
          MASK_XSIGN = 0x8000, // 1000000000000000
    
          MASK_YSIGN = 0x4000, // 0100000000000000
    
          MASK_ZSIGN = 0x2000; // 0010000000000000
    
      }
    
      ////////////////////////////////////////
    
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      2
      TEST_F(TestQuantizedUnitVec, testQuantization)
    
      {
    
          using namespace openvdb;
    
          using namespace openvdb::math;
    
          //
    
          // Check sign bits
    
          //
    
          Vec3s unitVec = Vec3s(-1.0, -1.0, -1.0);
    
      1
          unitVec.normalize();
    
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          uint16_t quantizedVec = QuantizedUnitVec::pack(unitVec);
    
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          EXPECT_TRUE((quantizedVec & MASK_XSIGN));
    
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          EXPECT_TRUE((quantizedVec & MASK_YSIGN));
    
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          EXPECT_TRUE((quantizedVec & MASK_ZSIGN));
    
      1
          unitVec[0] = -unitVec[0];
    
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          unitVec[2] = -unitVec[2];
    
      1
          quantizedVec = QuantizedUnitVec::pack(unitVec);
    
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          EXPECT_TRUE(!(quantizedVec & MASK_XSIGN));
    
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          EXPECT_TRUE((quantizedVec & MASK_YSIGN));
    
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          EXPECT_TRUE(!(quantizedVec & MASK_ZSIGN));
    
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          unitVec[1] = -unitVec[1];
    
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          quantizedVec = QuantizedUnitVec::pack(unitVec);
    
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          EXPECT_TRUE(!(quantizedVec & MASK_XSIGN));
    
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          EXPECT_TRUE(!(quantizedVec & MASK_YSIGN));
    
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      1
          EXPECT_TRUE(!(quantizedVec & MASK_ZSIGN));
    
          QuantizedUnitVec::flipSignBits(quantizedVec);
    
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          EXPECT_TRUE((quantizedVec & MASK_XSIGN));
    
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          EXPECT_TRUE((quantizedVec & MASK_YSIGN));
    
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          EXPECT_TRUE((quantizedVec & MASK_ZSIGN));
    
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          unitVec[2] = -unitVec[2];
    
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          quantizedVec = QuantizedUnitVec::pack(unitVec);
    
          QuantizedUnitVec::flipSignBits(quantizedVec);
    
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          EXPECT_TRUE((quantizedVec & MASK_XSIGN));
    
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          EXPECT_TRUE((quantizedVec & MASK_YSIGN));
    
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          EXPECT_TRUE(!(quantizedVec & MASK_ZSIGN));
    
          //
    
          // Check conversion error
    
          //
    
          const double tol = 0.05; // component error tolerance
    
          const int numNormals = 40000;
    
          // init
    
      1
          srand(0);
    
          const int n = int(std::sqrt(double(numNormals)));
    
          const double xScale = (2.0 * M_PI) / double(n);
    
          const double yScale = M_PI / double(n);
    
          double x, y, theta, phi;
    
          Vec3s n0, n1;
    
          // generate random normals, by uniformly distributing points on a unit-sphere.
    
          // loop over a [0 to n) x [0 to n) grid.
    
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          for (int a = 0; a < n; ++a) {
    
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              for (int b = 0; b < n; ++b) {
    
                  // jitter, move to random pos. inside the current cell
    
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                  x = double(a) + randNumber();
    
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                  y = double(b) + randNumber();
    
                  // remap to a lat/long map
    
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                  theta = y * yScale; // [0 to PI]
    
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                  phi   = x * xScale; // [0 to 2PI]
    
                  // convert to cartesian coordinates on a unit sphere.
    
                  // spherical coordinate triplet (r=1, theta, phi)
    
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                  n0[0] = float(std::sin(theta)*std::cos(phi));
    
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                  n0[1] = float(std::sin(theta)*std::sin(phi));
    
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                  n0[2] = float(std::cos(theta));
    
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                  EXPECT_NEAR(1.0, n0.length(), 1e-6);
    
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                  n1 = QuantizedUnitVec::unpack(QuantizedUnitVec::pack(n0));
    
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                  EXPECT_NEAR(1.0, n1.length(), 1e-6);
    
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                  EXPECT_NEAR(n0[0], n1[0], tol);
    
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                  EXPECT_NEAR(n0[2], n1[2], tol);
    
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                  float sumDiff = std::abs(n0[0] - n1[0]) + std::abs(n0[1] - n1[1])
    
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                      + std::abs(n0[2] - n1[2]);
    
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                  EXPECT_TRUE(sumDiff < (2.0 * tol));
    
              }
    
          }
    
      1
      }

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/QuantizedUnitVec.h>
6			#include <openvdb/math/Math.h>
7			#include <openvdb/math/Vec3.h>
8
9			#include <gtest/gtest.h>
10
11			#include <sstream>
12			#include <algorithm>
13			#include <cmath>
14			#include <ctime>
15
16
17		1	class TestQuantizedUnitVec: public ::testing::Test
18			{
19			protected:
20			// Generate a random number in the range [0, 1].
21		120000	double randNumber() { return double(rand()) / (double(RAND_MAX) + 1.0); }
22			};
23
24
25			////////////////////////////////////////
26
27
28			namespace {
29			const uint16_t
30			MASK_XSIGN = 0x8000, // 1000000000000000
31			MASK_YSIGN = 0x4000, // 0100000000000000
32			MASK_ZSIGN = 0x2000; // 0010000000000000
33			}
34
35
36			////////////////////////////////////////
37
38
39	1/2 ✓ Branch 1 taken 1 times. ✗ Branch 2 not taken.	2	TEST_F(TestQuantizedUnitVec, testQuantization)
40			{
41			using namespace openvdb;
42			using namespace openvdb::math;
43
44			//
45			// Check sign bits
46			//
47			Vec3s unitVec = Vec3s(-1.0, -1.0, -1.0);
48		1	unitVec.normalize();
49
50	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	uint16_t quantizedVec = QuantizedUnitVec::pack(unitVec);
51
52	1/16 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✗ Branch 6 not taken. ✗ Branch 7 not taken. ✗ Branch 9 not taken. ✗ Branch 10 not taken. ✗ Branch 12 not taken. ✗ Branch 13 not taken. ✗ Branch 16 not taken. ✗ Branch 17 not taken. ✗ Branch 20 not taken. ✗ Branch 21 not taken. ✗ Branch 22 not taken. ✗ Branch 23 not taken.	1	EXPECT_TRUE((quantizedVec & MASK_XSIGN));
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55
56		1	unitVec[0] = -unitVec[0];
57		1	unitVec[2] = -unitVec[2];
58		1	quantizedVec = QuantizedUnitVec::pack(unitVec);
59
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63
64		1	unitVec[1] = -unitVec[1];
65		1	quantizedVec = QuantizedUnitVec::pack(unitVec);
66
67	1/16 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times. ✗ Branch 3 not taken. ✗ Branch 4 not taken. ✗ Branch 6 not taken. ✗ Branch 7 not taken. ✗ Branch 9 not taken. ✗ Branch 10 not taken. ✗ Branch 12 not taken. ✗ Branch 13 not taken. ✗ Branch 16 not taken. ✗ Branch 17 not taken. ✗ Branch 20 not taken. ✗ Branch 21 not taken. ✗ Branch 22 not taken. ✗ Branch 23 not taken.	1	EXPECT_TRUE(!(quantizedVec & MASK_XSIGN));
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70
71			QuantizedUnitVec::flipSignBits(quantizedVec);
72
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76
77		1	unitVec[2] = -unitVec[2];
78	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 1 times.	1	quantizedVec = QuantizedUnitVec::pack(unitVec);
79			QuantizedUnitVec::flipSignBits(quantizedVec);
80
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84
85			//
86			// Check conversion error
87			//
88			const double tol = 0.05; // component error tolerance
89
90			const int numNormals = 40000;
91
92
93			// init
94		1	srand(0);
95			const int n = int(std::sqrt(double(numNormals)));
96			const double xScale = (2.0 * M_PI) / double(n);
97			const double yScale = M_PI / double(n);
98
99			double x, y, theta, phi;
100			Vec3s n0, n1;
101
102			// generate random normals, by uniformly distributing points on a unit-sphere.
103
104			// loop over a [0 to n) x [0 to n) grid.
105	2/2 ✓ Branch 0 taken 200 times. ✓ Branch 1 taken 1 times.	201	for (int a = 0; a < n; ++a) {
106	2/2 ✓ Branch 0 taken 40000 times. ✓ Branch 1 taken 200 times.	40200	for (int b = 0; b < n; ++b) {
107
108			// jitter, move to random pos. inside the current cell
109		40000	x = double(a) + randNumber();
110		40000	y = double(b) + randNumber();
111
112			// remap to a lat/long map
113		40000	theta = y * yScale; // [0 to PI]
114		40000	phi = x * xScale; // [0 to 2PI]
115
116			// convert to cartesian coordinates on a unit sphere.
117			// spherical coordinate triplet (r=1, theta, phi)
118		40000	n0[0] = float(std::sin(theta)*std::cos(phi));
119		40000	n0[1] = float(std::sin(theta)*std::sin(phi));
120		40000	n0[2] = float(std::cos(theta));
121
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123
124		40000	n1 = QuantizedUnitVec::unpack(QuantizedUnitVec::pack(n0));
125
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127
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131
132	1/2 ✗ Branch 0 not taken. ✓ Branch 1 taken 40000 times.	40000	float sumDiff = std::abs(n0[0] - n1[0]) + std::abs(n0[1] - n1[1])
133		40000	+ std::abs(n0[2] - n1[2]);
134
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136			}
137			}
138		1	}
139