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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_ |
11 #define UI_GFX_VECTOR2D_F_H_ | 11 #define UI_GFX_VECTOR2D_F_H_ |
12 | 12 |
13 #include <string> | 13 #include <string> |
14 | 14 |
15 #include "ui/gfx/gfx_export.h" | 15 #include "ui/gfx/gfx_export.h" |
16 | 16 |
17 namespace gfx { | 17 namespace gfx { |
18 | 18 |
19 class UI_EXPORT Vector2dF { | 19 class GFX_EXPORT Vector2dF { |
20 public: | 20 public: |
21 Vector2dF() : x_(0), y_(0) {} | 21 Vector2dF() : x_(0), y_(0) {} |
22 Vector2dF(float x, float y) : x_(x), y_(y) {} | 22 Vector2dF(float x, float y) : x_(x), y_(y) {} |
23 | 23 |
24 float x() const { return x_; } | 24 float x() const { return x_; } |
25 void set_x(float x) { x_ = x; } | 25 void set_x(float x) { x_ = x; } |
26 | 26 |
27 float y() const { return y_; } | 27 float y() const { return y_; } |
28 void set_y(float y) { y_ = y; } | 28 void set_y(float y) { y_ = y; } |
29 | 29 |
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84 return result; | 84 return result; |
85 } | 85 } |
86 | 86 |
87 inline Vector2dF operator-(const Vector2dF& lhs, const Vector2dF& rhs) { | 87 inline Vector2dF operator-(const Vector2dF& lhs, const Vector2dF& rhs) { |
88 Vector2dF result = lhs; | 88 Vector2dF result = lhs; |
89 result.Add(-rhs); | 89 result.Add(-rhs); |
90 return result; | 90 return result; |
91 } | 91 } |
92 | 92 |
93 // Return the cross product of two vectors. | 93 // Return the cross product of two vectors. |
94 UI_EXPORT double CrossProduct(const Vector2dF& lhs, const Vector2dF& rhs); | 94 GFX_EXPORT double CrossProduct(const Vector2dF& lhs, const Vector2dF& rhs); |
95 | 95 |
96 // Return the dot product of two vectors. | 96 // Return the dot product of two vectors. |
97 UI_EXPORT double DotProduct(const Vector2dF& lhs, const Vector2dF& rhs); | 97 GFX_EXPORT double DotProduct(const Vector2dF& lhs, const Vector2dF& rhs); |
98 | 98 |
99 // Return a vector that is |v| scaled by the given scale factors along each | 99 // Return a vector that is |v| scaled by the given scale factors along each |
100 // axis. | 100 // axis. |
101 UI_EXPORT Vector2dF ScaleVector2d(const Vector2dF& v, | 101 GFX_EXPORT Vector2dF ScaleVector2d(const Vector2dF& v, |
102 float x_scale, | 102 float x_scale, |
103 float y_scale); | 103 float y_scale); |
104 | 104 |
105 // Return a vector that is |v| scaled by the given scale factor. | 105 // Return a vector that is |v| scaled by the given scale factor. |
106 inline Vector2dF ScaleVector2d(const Vector2dF& v, float scale) { | 106 inline Vector2dF ScaleVector2d(const Vector2dF& v, float scale) { |
107 return ScaleVector2d(v, scale, scale); | 107 return ScaleVector2d(v, scale, scale); |
108 } | 108 } |
109 | 109 |
110 } // namespace gfx | 110 } // namespace gfx |
111 | 111 |
112 #endif // UI_GFX_VECTOR2D_F_H_ | 112 #endif // UI_GFX_VECTOR2D_F_H_ |
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