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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.
#include "ui/gfx/vector2d_f.h"
#include <cmath>
#include "base/stringprintf.h"
namespace gfx {
Vector2dF::Vector2dF()
: x_(0),
y_(0) {
}
Vector2dF::Vector2dF(float x, float y)
: x_(x),
y_(y) {
}
std::string Vector2dF::ToString() const {
return base::StringPrintf("[%f %f]", x_, y_);
}
bool Vector2dF::IsZero() const {
return x_ == 0 && y_ == 0;
}
void Vector2dF::Add(const Vector2dF& other) {
x_ += other.x_;
y_ += other.y_;
}
void Vector2dF::Subtract(const Vector2dF& other) {
x_ -= other.x_;
y_ -= other.y_;
}
double Vector2dF::LengthSquared() const {
return static_cast<double>(x_) * x_ + static_cast<double>(y_) * y_;
}
float Vector2dF::Length() const {
return static_cast<float>(std::sqrt(LengthSquared()));
}
void Vector2dF::Scale(float x_scale, float y_scale) {
x_ *= x_scale;
y_ *= y_scale;
}
double CrossProduct(const Vector2dF& lhs, const Vector2dF& rhs) {
return static_cast<double>(lhs.x()) * rhs.y() -
static_cast<double>(lhs.y()) * rhs.x();
}
double DotProduct(const Vector2dF& lhs, const Vector2dF& rhs) {
return static_cast<double>(lhs.x()) * rhs.x() +
static_cast<double>(lhs.y()) * rhs.y();
}
} // namespace gfx
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