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
|
// Copyright 2012 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 <cmath>
#include "base/strings/stringprintf.h"
#include "base/trace_event/typed_macros.h"
#include "build/build_config.h"
namespace gfx {
std::string Vector2dF::ToString() const {
return base::StringPrintf("[%g %g]", x_, y_);
}
void Vector2dF::WriteIntoTrace(perfetto::TracedValue ctx) const {
perfetto::TracedDictionary dict = std::move(ctx).WriteDictionary();
dict.Add("x", x_);
dict.Add("y", y_);
}
bool Vector2dF::IsZero() const {
return x_ == 0 && y_ == 0;
}
void Vector2dF::Add(const Vector2dF& other) {
x_ += other.x_;
y_ += other.y_;
}
void Vector2dF::Subtract(const Vector2dF& other) {
x_ -= other.x_;
y_ -= other.y_;
}
double Vector2dF::LengthSquared() const {
return static_cast<double>(x_) * x_ + static_cast<double>(y_) * y_;
}
float Vector2dF::Length() const {
return hypotf(x_, y_);
}
void Vector2dF::Scale(float x_scale, float y_scale) {
x_ *= x_scale;
y_ *= y_scale;
}
void Vector2dF::InvScale(float inv_x_scale, float inv_y_scale) {
x_ /= inv_x_scale;
y_ /= inv_y_scale;
}
double CrossProduct(const Vector2dF& lhs, const Vector2dF& rhs) {
return static_cast<double>(lhs.x()) * rhs.y() -
static_cast<double>(lhs.y()) * rhs.x();
}
double DotProduct(const Vector2dF& lhs, const Vector2dF& rhs) {
return static_cast<double>(lhs.x()) * rhs.x() +
static_cast<double>(lhs.y()) * rhs.y();
}
Vector2dF ScaleVector2d(const Vector2dF& v, float x_scale, float y_scale) {
Vector2dF scaled_v(v);
scaled_v.Scale(x_scale, y_scale);
return scaled_v;
}
float Vector2dF::SlopeAngleRadians() const {
#if BUILDFLAG(IS_APPLE)
// atan2f(...) returns less accurate results on Mac.
// 3.1415925 vs. 3.14159274 for atan2f(0, -50) as an example.
return static_cast<float>(
atan2(static_cast<double>(y_), static_cast<double>(x_)));
#else
return atan2f(y_, x_);
#endif
}
} // namespace gfx
|
