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 3 // found in the LICENSE file. 4 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 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 10 #ifndef UI_GFX_VECTOR3D_F_H_ 11 #define UI_GFX_VECTOR3D_F_H_ 12 13 #include <string> 14 15 #include "ui/gfx/gfx_export.h" 16 #include "ui/gfx/vector2d_f.h" 17 18 namespace gfx { 19 20 class GFX_EXPORT Vector3dF { 21 public: 22 Vector3dF(); 23 Vector3dF(float x, float y, float z); 24 25 explicit Vector3dF(const Vector2dF& other); 26 27 float x() const { return x_; } 28 void set_x(float x) { x_ = x; } 29 30 float y() const { return y_; } 31 void set_y(float y) { y_ = y; } 32 33 float z() const { return z_; } 34 void set_z(float z) { z_ = z; } 35 36 // True if all components of the vector are 0. 37 bool IsZero() const; 38 39 // Add the components of the |other| vector to the current vector. 40 void Add(const Vector3dF& other); 41 // Subtract the components of the |other| vector from the current vector. 42 void Subtract(const Vector3dF& other); 43 44 void operator+=(const Vector3dF& other) { Add(other); } 45 void operator-=(const Vector3dF& other) { Subtract(other); } 46 47 void SetToMin(const Vector3dF& other) { 48 x_ = x_ <= other.x_ ? x_ : other.x_; 49 y_ = y_ <= other.y_ ? y_ : other.y_; 50 z_ = z_ <= other.z_ ? z_ : other.z_; 51 } 52 53 void SetToMax(const Vector3dF& other) { 54 x_ = x_ >= other.x_ ? x_ : other.x_; 55 y_ = y_ >= other.y_ ? y_ : other.y_; 56 z_ = z_ >= other.z_ ? z_ : other.z_; 57 } 58 59 // Gives the square of the diagonal length of the vector. 60 double LengthSquared() const; 61 // Gives the diagonal length of the vector. 62 float Length() const; 63 64 // Scale all components of the vector by |scale|. 65 void Scale(float scale) { Scale(scale, scale, scale); } 66 // Scale the each component of the vector by the given scale factors. 67 void Scale(float x_scale, float y_scale, float z_scale); 68 69 // Take the cross product of this vector with |other| and become the result. 70 void Cross(const Vector3dF& other); 71 72 std::string ToString() const; 73 74 private: 75 float x_; 76 float y_; 77 float z_; 78 }; 79 80 inline bool operator==(const Vector3dF& lhs, const Vector3dF& rhs) { 81 return lhs.x() == rhs.x() && lhs.y() == rhs.y() && lhs.z() == rhs.z(); 82 } 83 84 inline Vector3dF operator-(const Vector3dF& v) { 85 return Vector3dF(-v.x(), -v.y(), -v.z()); 86 } 87 88 inline Vector3dF operator+(const Vector3dF& lhs, const Vector3dF& rhs) { 89 Vector3dF result = lhs; 90 result.Add(rhs); 91 return result; 92 } 93 94 inline Vector3dF operator-(const Vector3dF& lhs, const Vector3dF& rhs) { 95 Vector3dF result = lhs; 96 result.Add(-rhs); 97 return result; 98 } 99 100 // Return the cross product of two vectors. 101 inline Vector3dF CrossProduct(const Vector3dF& lhs, const Vector3dF& rhs) { 102 Vector3dF result = lhs; 103 result.Cross(rhs); 104 return result; 105 } 106 107 // Return the dot product of two vectors. 108 GFX_EXPORT float DotProduct(const Vector3dF& lhs, const Vector3dF& rhs); 109 110 // Return a vector that is |v| scaled by the given scale factors along each 111 // axis. 112 GFX_EXPORT Vector3dF ScaleVector3d(const Vector3dF& v, 113 float x_scale, 114 float y_scale, 115 float z_scale); 116 117 // Return a vector that is |v| scaled by the given scale factor. 118 inline Vector3dF ScaleVector3d(const Vector3dF& v, float scale) { 119 return ScaleVector3d(v, scale, scale, scale); 120 } 121 122 } // namespace gfx 123 124 #endif // UI_GFX_VECTOR3D_F_H_ 125
