OLD | NEW |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Defines a simple float vector class. This class is used to indicate a | 5 // TODO(beng): remove once callsites are patched. |
6 // distance in two dimensions between two points. Subtracting two points should | 6 #include "ui/gfx/geometry/vector2d_f.h" |
7 // produce a vector, and adding a vector to a point produces the point at the | |
8 // vector's distance from the original point. | |
9 | 7 |
10 #ifndef UI_GFX_VECTOR2D_F_H_ | |
11 #define UI_GFX_VECTOR2D_F_H_ | |
12 | |
13 #include <string> | |
14 | |
15 #include "ui/gfx/gfx_export.h" | |
16 | |
17 namespace gfx { | |
18 | |
19 class GFX_EXPORT Vector2dF { | |
20 public: | |
21 Vector2dF() : x_(0), y_(0) {} | |
22 Vector2dF(float x, float y) : x_(x), y_(y) {} | |
23 | |
24 float x() const { return x_; } | |
25 void set_x(float x) { x_ = x; } | |
26 | |
27 float y() const { return y_; } | |
28 void set_y(float y) { y_ = y; } | |
29 | |
30 // True if both components of the vector are 0. | |
31 bool IsZero() const; | |
32 | |
33 // Add the components of the |other| vector to the current vector. | |
34 void Add(const Vector2dF& other); | |
35 // Subtract the components of the |other| vector from the current vector. | |
36 void Subtract(const Vector2dF& other); | |
37 | |
38 void operator+=(const Vector2dF& other) { Add(other); } | |
39 void operator-=(const Vector2dF& other) { Subtract(other); } | |
40 | |
41 void SetToMin(const Vector2dF& other) { | |
42 x_ = x_ <= other.x_ ? x_ : other.x_; | |
43 y_ = y_ <= other.y_ ? y_ : other.y_; | |
44 } | |
45 | |
46 void SetToMax(const Vector2dF& other) { | |
47 x_ = x_ >= other.x_ ? x_ : other.x_; | |
48 y_ = y_ >= other.y_ ? y_ : other.y_; | |
49 } | |
50 | |
51 // Gives the square of the diagonal length of the vector. | |
52 double LengthSquared() const; | |
53 // Gives the diagonal length of the vector. | |
54 float Length() const; | |
55 | |
56 // Scale the x and y components of the vector by |scale|. | |
57 void Scale(float scale) { Scale(scale, scale); } | |
58 // Scale the x and y components of the vector by |x_scale| and |y_scale| | |
59 // respectively. | |
60 void Scale(float x_scale, float y_scale); | |
61 | |
62 std::string ToString() const; | |
63 | |
64 private: | |
65 float x_; | |
66 float y_; | |
67 }; | |
68 | |
69 inline bool operator==(const Vector2dF& lhs, const Vector2dF& rhs) { | |
70 return lhs.x() == rhs.x() && lhs.y() == rhs.y(); | |
71 } | |
72 | |
73 inline bool operator!=(const Vector2dF& lhs, const Vector2dF& rhs) { | |
74 return !(lhs == rhs); | |
75 } | |
76 | |
77 inline Vector2dF operator-(const Vector2dF& v) { | |
78 return Vector2dF(-v.x(), -v.y()); | |
79 } | |
80 | |
81 inline Vector2dF operator+(const Vector2dF& lhs, const Vector2dF& rhs) { | |
82 Vector2dF result = lhs; | |
83 result.Add(rhs); | |
84 return result; | |
85 } | |
86 | |
87 inline Vector2dF operator-(const Vector2dF& lhs, const Vector2dF& rhs) { | |
88 Vector2dF result = lhs; | |
89 result.Add(-rhs); | |
90 return result; | |
91 } | |
92 | |
93 // Return the cross product of two vectors. | |
94 GFX_EXPORT double CrossProduct(const Vector2dF& lhs, const Vector2dF& rhs); | |
95 | |
96 // Return the dot product of two vectors. | |
97 GFX_EXPORT double DotProduct(const Vector2dF& lhs, const Vector2dF& rhs); | |
98 | |
99 // Return a vector that is |v| scaled by the given scale factors along each | |
100 // axis. | |
101 GFX_EXPORT Vector2dF ScaleVector2d(const Vector2dF& v, | |
102 float x_scale, | |
103 float y_scale); | |
104 | |
105 // Return a vector that is |v| scaled by the given scale factor. | |
106 inline Vector2dF ScaleVector2d(const Vector2dF& v, float scale) { | |
107 return ScaleVector2d(v, scale, scale); | |
108 } | |
109 | |
110 } // namespace gfx | |
111 | |
112 #endif // UI_GFX_VECTOR2D_F_H_ | |
OLD | NEW |