blob: e42e19ceba60d50fbdb193877e959b73a43ac60d [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cobalt/math/vector2d.h"
#include "cobalt/math/vector2d_f.h"
#include <cmath>
#include <limits>
#include "base/basictypes.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace cobalt {
namespace math {
TEST(Vector2dTest, ConversionToFloat) {
Vector2d i(3, 4);
Vector2dF f = i;
EXPECT_EQ(i, f);
}
TEST(Vector2dTest, IsZero) {
Vector2d int_zero(0, 0);
Vector2d int_nonzero(2, -2);
Vector2dF float_zero(0, 0);
Vector2dF float_nonzero(0.1f, -0.1f);
EXPECT_TRUE(int_zero.IsZero());
EXPECT_FALSE(int_nonzero.IsZero());
EXPECT_TRUE(float_zero.IsZero());
EXPECT_FALSE(float_nonzero.IsZero());
}
TEST(Vector2dTest, Add) {
Vector2d i1(3, 5);
Vector2d i2(4, -1);
const struct {
Vector2d expected;
Vector2d actual;
} int_tests[] = {{Vector2d(3, 5), i1 + Vector2d()},
{Vector2d(3 + 4, 5 - 1), i1 + i2},
{Vector2d(3 - 4, 5 + 1), i1 - i2}};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(int_tests); ++i)
EXPECT_EQ(int_tests[i].expected.ToString(), int_tests[i].actual.ToString());
Vector2dF f1(3.1f, 5.1f);
Vector2dF f2(4.3f, -1.3f);
const struct {
Vector2dF expected;
Vector2dF actual;
} float_tests[] = {{Vector2dF(3.1F, 5.1F), f1 + Vector2d()},
{Vector2dF(3.1F, 5.1F), f1 + Vector2dF()},
{Vector2dF(3.1f + 4.3f, 5.1f - 1.3f), f1 + f2},
{Vector2dF(3.1f - 4.3f, 5.1f + 1.3f), f1 - f2}};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(float_tests); ++i)
EXPECT_EQ(float_tests[i].expected.ToString(),
float_tests[i].actual.ToString());
}
TEST(Vector2dTest, Negative) {
const struct {
Vector2d expected;
Vector2d actual;
} int_tests[] = {{Vector2d(0, 0), -Vector2d(0, 0)},
{Vector2d(-3, -3), -Vector2d(3, 3)},
{Vector2d(3, 3), -Vector2d(-3, -3)},
{Vector2d(-3, 3), -Vector2d(3, -3)},
{Vector2d(3, -3), -Vector2d(-3, 3)}};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(int_tests); ++i)
EXPECT_EQ(int_tests[i].expected.ToString(), int_tests[i].actual.ToString());
const struct {
Vector2dF expected;
Vector2dF actual;
} float_tests[] = {{Vector2dF(0, 0), -Vector2d(0, 0)},
{Vector2dF(-0.3f, -0.3f), -Vector2dF(0.3f, 0.3f)},
{Vector2dF(0.3f, 0.3f), -Vector2dF(-0.3f, -0.3f)},
{Vector2dF(-0.3f, 0.3f), -Vector2dF(0.3f, -0.3f)},
{Vector2dF(0.3f, -0.3f), -Vector2dF(-0.3f, 0.3f)}};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(float_tests); ++i)
EXPECT_EQ(float_tests[i].expected.ToString(),
float_tests[i].actual.ToString());
}
TEST(Vector2dTest, 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 (size_t i = 0; i < ARRAYSIZE_UNSAFE(double_values); ++i) {
Vector2dF v(double_values[i][0], double_values[i][1]);
v.Scale(double_values[i][2], double_values[i][3]);
EXPECT_EQ(v.x(), double_values[i][0] * double_values[i][2]);
EXPECT_EQ(v.y(), double_values[i][1] * double_values[i][3]);
Vector2dF v2 =
ScaleVector2d(Vector2dF(double_values[i][0], double_values[i][1]),
double_values[i][2], double_values[i][3]);
EXPECT_EQ(double_values[i][0] * double_values[i][2], v2.x());
EXPECT_EQ(double_values[i][1] * double_values[i][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 (size_t i = 0; i < ARRAYSIZE_UNSAFE(single_values); ++i) {
Vector2dF v(single_values[i][0], single_values[i][1]);
v.Scale(single_values[i][2]);
EXPECT_EQ(v.x(), single_values[i][0] * single_values[i][2]);
EXPECT_EQ(v.y(), single_values[i][1] * single_values[i][2]);
Vector2dF v2 =
ScaleVector2d(Vector2dF(double_values[i][0], double_values[i][1]),
double_values[i][2]);
EXPECT_EQ(single_values[i][0] * single_values[i][2], v2.x());
EXPECT_EQ(single_values[i][1] * single_values[i][2], v2.y());
}
}
TEST(Vector2dTest, Length) {
int int_values[][2] = {
{0, 0}, {10, 20}, {20, 10}, {-10, -20}, {-20, 10}, {10, -20},
};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(int_values); ++i) {
int v0 = int_values[i][0];
int v1 = int_values[i][1];
double length_squared =
static_cast<double>(v0) * v0 + static_cast<double>(v1) * v1;
double length = std::sqrt(length_squared);
Vector2d vector(v0, v1);
EXPECT_EQ(static_cast<float>(length_squared), vector.LengthSquared());
EXPECT_EQ(static_cast<float>(length), vector.Length());
}
float float_values[][2] = {
{0, 0},
{10.5f, 20.5f},
{20.5f, 10.5f},
{-10.5f, -20.5f},
{-20.5f, 10.5f},
{10.5f, -20.5f},
// A large vector that fails if the Length function doesn't use
// double precision internally.
{1236278317862780234892374893213178027.12122348904204230f,
335890352589839028212313231225425134332.38123f},
};
for (size_t i = 0; i < ARRAYSIZE_UNSAFE(float_values); ++i) {
double v0 = float_values[i][0];
double v1 = float_values[i][1];
double length_squared =
static_cast<double>(v0) * v0 + static_cast<double>(v1) * v1;
double length = std::sqrt(length_squared);
Vector2dF vector(v0, v1);
EXPECT_DOUBLE_EQ(length_squared, vector.LengthSquared());
EXPECT_FLOAT_EQ(static_cast<float>(length), vector.Length());
}
}
TEST(Vector2dTest, ClampVector2d) {
Vector2d a;
a = Vector2d(3, 5);
EXPECT_EQ(Vector2d(3, 5).ToString(), a.ToString());
a.SetToMax(Vector2d(2, 4));
EXPECT_EQ(Vector2d(3, 5).ToString(), a.ToString());
a.SetToMax(Vector2d(3, 5));
EXPECT_EQ(Vector2d(3, 5).ToString(), a.ToString());
a.SetToMax(Vector2d(4, 2));
EXPECT_EQ(Vector2d(4, 5).ToString(), a.ToString());
a.SetToMax(Vector2d(8, 10));
EXPECT_EQ(Vector2d(8, 10).ToString(), a.ToString());
a.SetToMin(Vector2d(9, 11));
EXPECT_EQ(Vector2d(8, 10).ToString(), a.ToString());
a.SetToMin(Vector2d(8, 10));
EXPECT_EQ(Vector2d(8, 10).ToString(), a.ToString());
a.SetToMin(Vector2d(11, 9));
EXPECT_EQ(Vector2d(8, 9).ToString(), a.ToString());
a.SetToMin(Vector2d(7, 11));
EXPECT_EQ(Vector2d(7, 9).ToString(), a.ToString());
a.SetToMin(Vector2d(3, 5));
EXPECT_EQ(Vector2d(3, 5).ToString(), a.ToString());
}
TEST(Vector2dTest, ClampVector2dF) {
Vector2dF a;
a = Vector2dF(3.5f, 5.5f);
EXPECT_EQ(Vector2dF(3.5f, 5.5f).ToString(), a.ToString());
a.SetToMax(Vector2dF(2.5f, 4.5f));
EXPECT_EQ(Vector2dF(3.5f, 5.5f).ToString(), a.ToString());
a.SetToMax(Vector2dF(3.5f, 5.5f));
EXPECT_EQ(Vector2dF(3.5f, 5.5f).ToString(), a.ToString());
a.SetToMax(Vector2dF(4.5f, 2.5f));
EXPECT_EQ(Vector2dF(4.5f, 5.5f).ToString(), a.ToString());
a.SetToMax(Vector2dF(8.5f, 10.5f));
EXPECT_EQ(Vector2dF(8.5f, 10.5f).ToString(), a.ToString());
a.SetToMin(Vector2dF(9.5f, 11.5f));
EXPECT_EQ(Vector2dF(8.5f, 10.5f).ToString(), a.ToString());
a.SetToMin(Vector2dF(8.5f, 10.5f));
EXPECT_EQ(Vector2dF(8.5f, 10.5f).ToString(), a.ToString());
a.SetToMin(Vector2dF(11.5f, 9.5f));
EXPECT_EQ(Vector2dF(8.5f, 9.5f).ToString(), a.ToString());
a.SetToMin(Vector2dF(7.5f, 11.5f));
EXPECT_EQ(Vector2dF(7.5f, 9.5f).ToString(), a.ToString());
a.SetToMin(Vector2dF(3.5f, 5.5f));
EXPECT_EQ(Vector2dF(3.5f, 5.5f).ToString(), a.ToString());
}
} // namespace math
} // namespace cobalt