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
62
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
92
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
150
151
152
153
154
155
|
// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/geometry/vector2d_f.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/geometry/test/geometry_util.h"
#include "ui/gfx/geometry/vector2d.h"
namespace gfx {
TEST(Vector2dTest, Vector2dToVector2dF) {
Vector2d i(3, 4);
Vector2dF f = i;
EXPECT_EQ(i, f);
}
TEST(Vector2dFTest, IsZero) {
EXPECT_TRUE(Vector2dF().IsZero());
EXPECT_TRUE(Vector2dF(0, 0).IsZero());
EXPECT_FALSE(Vector2dF(0.1f, 0).IsZero());
EXPECT_FALSE(Vector2dF(0, -0.1f).IsZero());
EXPECT_FALSE(Vector2dF(0.1f, -0.1f).IsZero());
}
TEST(Vector2dFTest, Add) {
Vector2dF f1(3.1f, 5.1f);
Vector2dF f2(4.3f, -1.3f);
EXPECT_VECTOR2DF_EQ(Vector2dF(3.1f, 5.1f), f1 + Vector2dF());
EXPECT_VECTOR2DF_EQ(Vector2dF(3.1f + 4.3f, 5.1f - 1.3f), f1 + f2);
EXPECT_VECTOR2DF_EQ(Vector2dF(3.1f - 4.3f, 5.1f + 1.3f), f1 - f2);
}
TEST(Vector2dFTest, Negative) {
EXPECT_VECTOR2DF_EQ(Vector2dF(), -Vector2dF());
EXPECT_VECTOR2DF_EQ(Vector2dF(-0.3f, -0.3f), -Vector2dF(0.3f, 0.3f));
EXPECT_VECTOR2DF_EQ(Vector2dF(0.3f, 0.3f), -Vector2dF(-0.3f, -0.3f));
EXPECT_VECTOR2DF_EQ(Vector2dF(-0.3f, 0.3f), -Vector2dF(0.3f, -0.3f));
EXPECT_VECTOR2DF_EQ(Vector2dF(0.3f, -0.3f), -Vector2dF(-0.3f, 0.3f));
}
TEST(Vector2dFTest, Scale) {
float double_values[][4] = {
{4.5f, 1.2f, 3.3f, 5.6f}, {4.5f, -1.2f, 3.3f, 5.6f},
{4.5f, 1.2f, 3.3f, -5.6f}, {4.5f, 1.2f, -3.3f, -5.6f},
{-4.5f, 1.2f, 3.3f, 5.6f}, {-4.5f, 1.2f, 0, 5.6f},
{-4.5f, 1.2f, 3.3f, 0}, {4.5f, 0, 3.3f, 5.6f},
{0, 1.2f, 3.3f, 5.6f}};
for (auto& values : double_values) {
Vector2dF v(values[0], values[1]);
v.Scale(values[2], values[3]);
EXPECT_EQ(v.x(), values[0] * values[2]);
EXPECT_EQ(v.y(), values[1] * values[3]);
Vector2dF v2 = ScaleVector2d(gfx::Vector2dF(values[0], values[1]),
values[2], values[3]);
EXPECT_EQ(values[0] * values[2], v2.x());
EXPECT_EQ(values[1] * values[3], v2.y());
}
float single_values[][3] = {
{4.5f, 1.2f, 3.3f}, {4.5f, -1.2f, 3.3f}, {4.5f, 1.2f, 3.3f},
{4.5f, 1.2f, -3.3f}, {-4.5f, 1.2f, 3.3f}, {-4.5f, 1.2f, 0},
{-4.5f, 1.2f, 3.3f}, {4.5f, 0, 3.3f}, {0, 1.2f, 3.3f}};
for (auto& values : single_values) {
Vector2dF v(values[0], values[1]);
v.Scale(values[2]);
EXPECT_EQ(v.x(), values[0] * values[2]);
EXPECT_EQ(v.y(), values[1] * values[2]);
Vector2dF v2 =
ScaleVector2d(gfx::Vector2dF(values[0], values[1]), values[2]);
EXPECT_EQ(values[0] * values[2], v2.x());
EXPECT_EQ(values[1] * values[2], v2.y());
}
}
TEST(Vector2dFTest, SetToMinMax) {
Vector2dF a;
a = Vector2dF(3.5f, 5.5f);
EXPECT_EQ(Vector2dF(3.5f, 5.5f), a);
a.SetToMax(Vector2dF(2.5f, 4.5f));
EXPECT_EQ(Vector2dF(3.5f, 5.5f), a);
a.SetToMax(Vector2dF(3.5f, 5.5f));
EXPECT_EQ(Vector2dF(3.5f, 5.5f), a);
a.SetToMax(Vector2dF(4.5f, 2.5f));
EXPECT_EQ(Vector2dF(4.5f, 5.5f), a);
a.SetToMax(Vector2dF(8.5f, 10.5f));
EXPECT_EQ(Vector2dF(8.5f, 10.5f), a);
a.SetToMin(Vector2dF(9.5f, 11.5f));
EXPECT_EQ(Vector2dF(8.5f, 10.5f), a);
a.SetToMin(Vector2dF(8.5f, 10.5f));
EXPECT_EQ(Vector2dF(8.5f, 10.5f), a);
a.SetToMin(Vector2dF(11.5f, 9.5f));
EXPECT_EQ(Vector2dF(8.5f, 9.5f), a);
a.SetToMin(Vector2dF(7.5f, 11.5f));
EXPECT_EQ(Vector2dF(7.5f, 9.5f), a);
a.SetToMin(Vector2dF(3.5f, 5.5f));
EXPECT_EQ(Vector2dF(3.5f, 5.5f), a);
}
TEST(Vector2dFTest, Length) {
constexpr float kFloatMax = std::numeric_limits<float>::max();
EXPECT_FLOAT_EQ(0.f, Vector2dF(0, 0).Length());
EXPECT_FLOAT_EQ(1.f, Vector2dF(1, 0).Length());
EXPECT_FLOAT_EQ(1.414214f, Vector2dF(1, 1).Length());
EXPECT_FLOAT_EQ(2.236068f, Vector2dF(-1, -2).Length());
// The Pythagorean triples 3-4-5 and 5-12-13.
EXPECT_FLOAT_EQ(5.f, Vector2dF(3.f, 4.f).Length());
EXPECT_FLOAT_EQ(13.f, Vector2dF(5.f, 12.f).Length());
// Very small numbers.
EXPECT_FLOAT_EQ(.7071068e-20f, Vector2dF(.5e-20f, .5e-20f).Length());
// Very large numbers.
EXPECT_FLOAT_EQ(.7071068e20f, Vector2dF(.5e20f, .5e20f).Length());
EXPECT_FLOAT_EQ(kFloatMax, Vector2dF(kFloatMax, 0).Length());
EXPECT_FLOAT_EQ(kFloatMax, Vector2dF(kFloatMax, kFloatMax).Length());
}
TEST(Vector2dFTest, SlopeAngleRadians) {
// The function is required to be very accurate, so we use a smaller
// tolerance than EXPECT_FLOAT_EQ().
constexpr float kTolerance = 1e-7f;
constexpr float kPi = 3.1415927f;
EXPECT_NEAR(0, Vector2dF(0, 0).SlopeAngleRadians(), kTolerance);
EXPECT_NEAR(0, Vector2dF(1, 0).SlopeAngleRadians(), kTolerance);
EXPECT_NEAR(kPi / 4, Vector2dF(1, 1).SlopeAngleRadians(), kTolerance);
EXPECT_NEAR(kPi / 2, Vector2dF(0, 1).SlopeAngleRadians(), kTolerance);
EXPECT_NEAR(kPi, Vector2dF(-50, 0).SlopeAngleRadians(), kTolerance);
EXPECT_NEAR(-kPi * 3 / 4, Vector2dF(-50, -50).SlopeAngleRadians(),
kTolerance);
EXPECT_NEAR(-kPi / 4, Vector2dF(1, -1).SlopeAngleRadians(), kTolerance);
}
TEST(Vector2dFTest, Transpose) {
gfx::Vector2dF v(-1.5f, 2.5f);
EXPECT_EQ(gfx::Vector2dF(2.5f, -1.5f), TransposeVector2d(v));
v.Transpose();
EXPECT_EQ(gfx::Vector2dF(2.5f, -1.5f), v);
}
TEST(Vector2dFTest, ToString) {
EXPECT_EQ("[1 2]", Vector2dF(1, 2).ToString());
EXPECT_EQ("[1.03125 2.5]", Vector2dF(1.03125, 2.5).ToString());
}
} // namespace gfx
|
