You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
100 lines
2.9 KiB
100 lines
2.9 KiB
// 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 UI_GFX_GEOMETRY_VECTOR2D_H_
|
|
#define UI_GFX_GEOMETRY_VECTOR2D_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <iosfwd>
|
|
#include <string>
|
|
|
|
#include "ui/gfx/geometry/vector2d_f.h"
|
|
#include "ui/gfx/gfx_export.h"
|
|
|
|
namespace gfx {
|
|
|
|
class GFX_EXPORT Vector2d {
|
|
public:
|
|
constexpr Vector2d() : x_(0), y_(0) {}
|
|
constexpr Vector2d(int x, int y) : x_(x), y_(y) {}
|
|
|
|
constexpr int x() const { return x_; }
|
|
void set_x(int x) { x_ = x; }
|
|
|
|
constexpr 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);
|
|
|
|
constexpr bool operator==(const Vector2d& other) const {
|
|
return x_ == other.x_ && y_ == other.y_;
|
|
}
|
|
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_t LengthSquared() const;
|
|
// Gives the diagonal length of the vector.
|
|
float Length() const;
|
|
|
|
std::string ToString() const;
|
|
|
|
operator Vector2dF() const {
|
|
return Vector2dF(static_cast<float>(x()), static_cast<float>(y()));
|
|
}
|
|
|
|
private:
|
|
int x_;
|
|
int y_;
|
|
};
|
|
|
|
inline constexpr 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;
|
|
}
|
|
|
|
// This is declared here for use in gtest-based unit tests but is defined in
|
|
// the //ui/gfx:test_support target. Depend on that to use this in your unit
|
|
// test. This should not be used in production code - call ToString() instead.
|
|
void PrintTo(const Vector2d& vector, ::std::ostream* os);
|
|
|
|
} // namespace gfx
|
|
|
|
#endif // UI_GFX_GEOMETRY_VECTOR2D_H_
|