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 // Copyright (c) 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Defines a simple integer vector class. This class is used to indicate a // distance in two dimensions between two points. Subtracting two points should // produce a vector, and adding a vector to a point produces the point at the // vector's distance from the original point. #ifndef COBALT_MATH_VECTOR2D_H_ #define COBALT_MATH_VECTOR2D_H_ #include #include #include "base/basictypes.h" #include "cobalt/math/vector2d_f.h" namespace cobalt { namespace math { class Vector2d { public: Vector2d() : x_(0), y_(0) {} Vector2d(int x, int y) : x_(x), y_(y) {} void SetVector(int x, int y) { x_ = x; y_ = y; } int x() const { return x_; } void set_x(int x) { x_ = x; } int y() const { return y_; } void set_y(int y) { y_ = y; } // True if both components of the vector are 0. bool IsZero() const; // Add the components of the |other| vector to the current vector. void Add(const Vector2d& other); // Subtract the components of the |other| vector from the current vector. void Subtract(const Vector2d& other); void operator+=(const Vector2d& other) { Add(other); } void operator-=(const Vector2d& other) { Subtract(other); } void SetToMin(const Vector2d& other) { x_ = x_ <= other.x_ ? x_ : other.x_; y_ = y_ <= other.y_ ? y_ : other.y_; } void SetToMax(const Vector2d& other) { x_ = x_ >= other.x_ ? x_ : other.x_; y_ = y_ >= other.y_ ? y_ : other.y_; } // Gives the square of the diagonal length of the vector. Since this is // cheaper to compute than Length(), it is useful when you want to compare // relative lengths of different vectors without needing the actual lengths. int64 LengthSquared() const; // Gives the diagonal length of the vector. float Length() const; std::string ToString() const; operator Vector2dF() const { return Vector2dF(static_cast(x_), static_cast(y_)); } private: int x_; int y_; }; inline bool operator==(const Vector2d& lhs, const Vector2d& rhs) { return lhs.x() == rhs.x() && lhs.y() == rhs.y(); } inline Vector2d operator-(const Vector2d& v) { return Vector2d(-v.x(), -v.y()); } inline Vector2d operator+(const Vector2d& lhs, const Vector2d& rhs) { Vector2d result = lhs; result.Add(rhs); return result; } inline Vector2d operator-(const Vector2d& lhs, const Vector2d& rhs) { Vector2d result = lhs; result.Add(-rhs); return result; } } // namespace math } // namespace cobalt #endif // COBALT_MATH_VECTOR2D_H_