ui/gfx/vector2d.cc

   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 #include "ui/gfx/vector2d.h"
   6
   7 #include <cmath>
   8
   9 #include "base/stringprintf.h"
  10
  11 namespace gfx {
  12
  13 bool Vector2d::IsZero() const {
  14   return x_ == 0 && y_ == 0;
  15 }
  16
  17 void Vector2d::Add(const Vector2d& other) {
  18   x_ += other.x_;
  19   y_ += other.y_;
  20 }
  21
  22 void Vector2d::Subtract(const Vector2d& other) {
  23   x_ -= other.x_;
  24   y_ -= other.y_;
  25 }
  26
  27 int64 Vector2d::LengthSquared() const {
  28   return static_cast<int64>(x_) * x_ + static_cast<int64>(y_) * y_;
  29 }
  30
  31 float Vector2d::Length() const {
  32   return static_cast<float>(std::sqrt(static_cast<double>(LengthSquared())));
  33 }
  34
  35 std::string Vector2d::ToString() const {
  36   return base::StringPrintf("[%d %d]", x_, y_);
  37 }
  38
  39 }  // namespace gfx