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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 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 // Defines a simple float vector class. This class is used to indicate a |
6 // distance in two dimensions between two points. Subtracting two points should | 6 // distance in two dimensions between two points. Subtracting two points should |
7 // produce a vector, and adding a vector to a point produces the point at the | 7 // produce a vector, and adding a vector to a point produces the point at the |
8 // vector's distance from the original point. | 8 // vector's distance from the original point. |
9 | 9 |
10 #ifndef UI_GFX_VECTOR2D_F_H_ | 10 #ifndef UI_GFX_VECTOR2D_F_H_ |
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31 bool IsZero() const; | 31 bool IsZero() const; |
32 | 32 |
33 // Add the components of the |other| vector to the current vector. | 33 // Add the components of the |other| vector to the current vector. |
34 void Add(const Vector2dF& other); | 34 void Add(const Vector2dF& other); |
35 // Subtract the components of the |other| vector from the current vector. | 35 // Subtract the components of the |other| vector from the current vector. |
36 void Subtract(const Vector2dF& other); | 36 void Subtract(const Vector2dF& other); |
37 | 37 |
38 void operator+=(const Vector2dF& other) { Add(other); } | 38 void operator+=(const Vector2dF& other) { Add(other); } |
39 void operator-=(const Vector2dF& other) { Subtract(other); } | 39 void operator-=(const Vector2dF& other) { Subtract(other); } |
40 | 40 |
41 void ClampToMax(const Vector2dF& max) { | 41 void SetToMin(const Vector2dF& other) { |
42 x_ = x_ <= max.x_ ? x_ : max.x_; | 42 x_ = x_ <= other.x_ ? x_ : other.x_; |
43 y_ = y_ <= max.y_ ? y_ : max.y_; | 43 y_ = y_ <= other.y_ ? y_ : other.y_; |
44 } | 44 } |
45 | 45 |
46 void ClampToMin(const Vector2dF& min) { | 46 void SetToMax(const Vector2dF& other) { |
47 x_ = x_ >= min.x_ ? x_ : min.x_; | 47 x_ = x_ >= other.x_ ? x_ : other.x_; |
48 y_ = y_ >= min.y_ ? y_ : min.y_; | 48 y_ = y_ >= other.y_ ? y_ : other.y_; |
49 } | 49 } |
50 | 50 |
51 // Gives the square of the diagonal length of the vector. | 51 // Gives the square of the diagonal length of the vector. |
52 double LengthSquared() const; | 52 double LengthSquared() const; |
53 // Gives the diagonal length of the vector. | 53 // Gives the diagonal length of the vector. |
54 float Length() const; | 54 float Length() const; |
55 | 55 |
56 // Scale the x and y components of the vector by |scale|. | 56 // Scale the x and y components of the vector by |scale|. |
57 void Scale(float scale) { Scale(scale, 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| | 58 // Scale the x and y components of the vector by |x_scale| and |y_scale| |
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99 float y_scale); | 99 float y_scale); |
100 | 100 |
101 // Return a vector that is |v| scaled by the given scale factor. | 101 // Return a vector that is |v| scaled by the given scale factor. |
102 inline Vector2dF ScaleVector2d(const Vector2dF& v, float scale) { | 102 inline Vector2dF ScaleVector2d(const Vector2dF& v, float scale) { |
103 return ScaleVector2d(v, scale, scale); | 103 return ScaleVector2d(v, scale, scale); |
104 } | 104 } |
105 | 105 |
106 } // namespace gfx | 106 } // namespace gfx |
107 | 107 |
108 #endif // UI_GFX_VECTOR2D_F_H_ | 108 #endif // UI_GFX_VECTOR2D_F_H_ |
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