1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <cmath> 6 #include <limits> 7 8 #include "base/basictypes.h" 9 #include "testing/gtest/include/gtest/gtest.h" 10 #include "ui/gfx/geometry/vector2d.h" 11 #include "ui/gfx/geometry/vector2d_f.h" 12 13 namespace gfx { 14 15 TEST(Vector2dTest, ConversionToFloat) { 16 Vector2d i(3, 4); 17 Vector2dF f = i; 18 EXPECT_EQ(i, f); 19 } 20 21 TEST(Vector2dTest, IsZero) { 22 Vector2d int_zero(0, 0); 23 Vector2d int_nonzero(2, -2); 24 Vector2dF float_zero(0, 0); 25 Vector2dF float_nonzero(0.1f, -0.1f); 26 27 EXPECT_TRUE(int_zero.IsZero()); 28 EXPECT_FALSE(int_nonzero.IsZero()); 29 EXPECT_TRUE(float_zero.IsZero()); 30 EXPECT_FALSE(float_nonzero.IsZero()); 31 } 32 33 TEST(Vector2dTest, Add) { 34 Vector2d i1(3, 5); 35 Vector2d i2(4, -1); 36 37 const struct { 38 Vector2d expected; 39 Vector2d actual; 40 } int_tests[] = { 41 { Vector2d(3, 5), i1 + Vector2d() }, 42 { Vector2d(3 + 4, 5 - 1), i1 + i2 }, 43 { Vector2d(3 - 4, 5 + 1), i1 - i2 } 44 }; 45 46 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(int_tests); ++i) 47 EXPECT_EQ(int_tests[i].expected.ToString(), 48 int_tests[i].actual.ToString()); 49 50 Vector2dF f1(3.1f, 5.1f); 51 Vector2dF f2(4.3f, -1.3f); 52 53 const struct { 54 Vector2dF expected; 55 Vector2dF actual; 56 } float_tests[] = { 57 { Vector2dF(3.1F, 5.1F), f1 + Vector2d() }, 58 { Vector2dF(3.1F, 5.1F), f1 + Vector2dF() }, 59 { Vector2dF(3.1f + 4.3f, 5.1f - 1.3f), f1 + f2 }, 60 { Vector2dF(3.1f - 4.3f, 5.1f + 1.3f), f1 - f2 } 61 }; 62 63 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(float_tests); ++i) 64 EXPECT_EQ(float_tests[i].expected.ToString(), 65 float_tests[i].actual.ToString()); 66 } 67 68 TEST(Vector2dTest, Negative) { 69 const struct { 70 Vector2d expected; 71 Vector2d actual; 72 } int_tests[] = { 73 { Vector2d(0, 0), -Vector2d(0, 0) }, 74 { Vector2d(-3, -3), -Vector2d(3, 3) }, 75 { Vector2d(3, 3), -Vector2d(-3, -3) }, 76 { Vector2d(-3, 3), -Vector2d(3, -3) }, 77 { Vector2d(3, -3), -Vector2d(-3, 3) } 78 }; 79 80 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(int_tests); ++i) 81 EXPECT_EQ(int_tests[i].expected.ToString(), 82 int_tests[i].actual.ToString()); 83 84 const struct { 85 Vector2dF expected; 86 Vector2dF actual; 87 } float_tests[] = { 88 { Vector2dF(0, 0), -Vector2d(0, 0) }, 89 { Vector2dF(-0.3f, -0.3f), -Vector2dF(0.3f, 0.3f) }, 90 { Vector2dF(0.3f, 0.3f), -Vector2dF(-0.3f, -0.3f) }, 91 { Vector2dF(-0.3f, 0.3f), -Vector2dF(0.3f, -0.3f) }, 92 { Vector2dF(0.3f, -0.3f), -Vector2dF(-0.3f, 0.3f) } 93 }; 94 95 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(float_tests); ++i) 96 EXPECT_EQ(float_tests[i].expected.ToString(), 97 float_tests[i].actual.ToString()); 98 } 99 100 TEST(Vector2dTest, Scale) { 101 float double_values[][4] = { 102 { 4.5f, 1.2f, 3.3f, 5.6f }, 103 { 4.5f, -1.2f, 3.3f, 5.6f }, 104 { 4.5f, 1.2f, 3.3f, -5.6f }, 105 { 4.5f, 1.2f, -3.3f, -5.6f }, 106 { -4.5f, 1.2f, 3.3f, 5.6f }, 107 { -4.5f, 1.2f, 0, 5.6f }, 108 { -4.5f, 1.2f, 3.3f, 0 }, 109 { 4.5f, 0, 3.3f, 5.6f }, 110 { 0, 1.2f, 3.3f, 5.6f } 111 }; 112 113 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(double_values); ++i) { 114 Vector2dF v(double_values[i][0], double_values[i][1]); 115 v.Scale(double_values[i][2], double_values[i][3]); 116 EXPECT_EQ(v.x(), double_values[i][0] * double_values[i][2]); 117 EXPECT_EQ(v.y(), double_values[i][1] * double_values[i][3]); 118 119 Vector2dF v2 = ScaleVector2d( 120 gfx::Vector2dF(double_values[i][0], double_values[i][1]), 121 double_values[i][2], double_values[i][3]); 122 EXPECT_EQ(double_values[i][0] * double_values[i][2], v2.x()); 123 EXPECT_EQ(double_values[i][1] * double_values[i][3], v2.y()); 124 } 125 126 float single_values[][3] = { 127 { 4.5f, 1.2f, 3.3f }, 128 { 4.5f, -1.2f, 3.3f }, 129 { 4.5f, 1.2f, 3.3f }, 130 { 4.5f, 1.2f, -3.3f }, 131 { -4.5f, 1.2f, 3.3f }, 132 { -4.5f, 1.2f, 0 }, 133 { -4.5f, 1.2f, 3.3f }, 134 { 4.5f, 0, 3.3f }, 135 { 0, 1.2f, 3.3f } 136 }; 137 138 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(single_values); ++i) { 139 Vector2dF v(single_values[i][0], single_values[i][1]); 140 v.Scale(single_values[i][2]); 141 EXPECT_EQ(v.x(), single_values[i][0] * single_values[i][2]); 142 EXPECT_EQ(v.y(), single_values[i][1] * single_values[i][2]); 143 144 Vector2dF v2 = ScaleVector2d( 145 gfx::Vector2dF(double_values[i][0], double_values[i][1]), 146 double_values[i][2]); 147 EXPECT_EQ(single_values[i][0] * single_values[i][2], v2.x()); 148 EXPECT_EQ(single_values[i][1] * single_values[i][2], v2.y()); 149 } 150 } 151 152 TEST(Vector2dTest, Length) { 153 int int_values[][2] = { 154 { 0, 0 }, 155 { 10, 20 }, 156 { 20, 10 }, 157 { -10, -20 }, 158 { -20, 10 }, 159 { 10, -20 }, 160 }; 161 162 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(int_values); ++i) { 163 int v0 = int_values[i][0]; 164 int v1 = int_values[i][1]; 165 double length_squared = 166 static_cast<double>(v0) * v0 + static_cast<double>(v1) * v1; 167 double length = std::sqrt(length_squared); 168 Vector2d vector(v0, v1); 169 EXPECT_EQ(static_cast<float>(length_squared), vector.LengthSquared()); 170 EXPECT_EQ(static_cast<float>(length), vector.Length()); 171 } 172 173 float float_values[][2] = { 174 { 0, 0 }, 175 { 10.5f, 20.5f }, 176 { 20.5f, 10.5f }, 177 { -10.5f, -20.5f }, 178 { -20.5f, 10.5f }, 179 { 10.5f, -20.5f }, 180 // A large vector that fails if the Length function doesn't use 181 // double precision internally. 182 { 1236278317862780234892374893213178027.12122348904204230f, 183 335890352589839028212313231225425134332.38123f }, 184 }; 185 186 for (size_t i = 0; i < ARRAYSIZE_UNSAFE(float_values); ++i) { 187 double v0 = float_values[i][0]; 188 double v1 = float_values[i][1]; 189 double length_squared = 190 static_cast<double>(v0) * v0 + static_cast<double>(v1) * v1; 191 double length = std::sqrt(length_squared); 192 Vector2dF vector(v0, v1); 193 EXPECT_DOUBLE_EQ(length_squared, vector.LengthSquared()); 194 EXPECT_FLOAT_EQ(static_cast<float>(length), vector.Length()); 195 } 196 } 197 198 TEST(Vector2dTest, ClampVector2d) { 199 Vector2d a; 200 201 a = Vector2d(3, 5); 202 EXPECT_EQ(Vector2d(3, 5).ToString(), a.ToString()); 203 a.SetToMax(Vector2d(2, 4)); 204 EXPECT_EQ(Vector2d(3, 5).ToString(), a.ToString()); 205 a.SetToMax(Vector2d(3, 5)); 206 EXPECT_EQ(Vector2d(3, 5).ToString(), a.ToString()); 207 a.SetToMax(Vector2d(4, 2)); 208 EXPECT_EQ(Vector2d(4, 5).ToString(), a.ToString()); 209 a.SetToMax(Vector2d(8, 10)); 210 EXPECT_EQ(Vector2d(8, 10).ToString(), a.ToString()); 211 212 a.SetToMin(Vector2d(9, 11)); 213 EXPECT_EQ(Vector2d(8, 10).ToString(), a.ToString()); 214 a.SetToMin(Vector2d(8, 10)); 215 EXPECT_EQ(Vector2d(8, 10).ToString(), a.ToString()); 216 a.SetToMin(Vector2d(11, 9)); 217 EXPECT_EQ(Vector2d(8, 9).ToString(), a.ToString()); 218 a.SetToMin(Vector2d(7, 11)); 219 EXPECT_EQ(Vector2d(7, 9).ToString(), a.ToString()); 220 a.SetToMin(Vector2d(3, 5)); 221 EXPECT_EQ(Vector2d(3, 5).ToString(), a.ToString()); 222 } 223 224 TEST(Vector2dTest, ClampVector2dF) { 225 Vector2dF a; 226 227 a = Vector2dF(3.5f, 5.5f); 228 EXPECT_EQ(Vector2dF(3.5f, 5.5f).ToString(), a.ToString()); 229 a.SetToMax(Vector2dF(2.5f, 4.5f)); 230 EXPECT_EQ(Vector2dF(3.5f, 5.5f).ToString(), a.ToString()); 231 a.SetToMax(Vector2dF(3.5f, 5.5f)); 232 EXPECT_EQ(Vector2dF(3.5f, 5.5f).ToString(), a.ToString()); 233 a.SetToMax(Vector2dF(4.5f, 2.5f)); 234 EXPECT_EQ(Vector2dF(4.5f, 5.5f).ToString(), a.ToString()); 235 a.SetToMax(Vector2dF(8.5f, 10.5f)); 236 EXPECT_EQ(Vector2dF(8.5f, 10.5f).ToString(), a.ToString()); 237 238 a.SetToMin(Vector2dF(9.5f, 11.5f)); 239 EXPECT_EQ(Vector2dF(8.5f, 10.5f).ToString(), a.ToString()); 240 a.SetToMin(Vector2dF(8.5f, 10.5f)); 241 EXPECT_EQ(Vector2dF(8.5f, 10.5f).ToString(), a.ToString()); 242 a.SetToMin(Vector2dF(11.5f, 9.5f)); 243 EXPECT_EQ(Vector2dF(8.5f, 9.5f).ToString(), a.ToString()); 244 a.SetToMin(Vector2dF(7.5f, 11.5f)); 245 EXPECT_EQ(Vector2dF(7.5f, 9.5f).ToString(), a.ToString()); 246 a.SetToMin(Vector2dF(3.5f, 5.5f)); 247 EXPECT_EQ(Vector2dF(3.5f, 5.5f).ToString(), a.ToString()); 248 } 249 250 } // namespace gfx 251
