blob: 905b38a9e3bad651c435e9283226bdda3cc24c06 [file] [log] [blame]
 // 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 "cobalt/math/vector2d_f.h" #include #include "base/strings/stringprintf.h" namespace cobalt { namespace math { 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(x_) * x_ + static_cast(y_) * y_; } float Vector2dF::Length() const { return static_cast(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(lhs.x()) * rhs.y() - static_cast(lhs.y()) * rhs.x(); } double DotProduct(const Vector2dF& lhs, const Vector2dF& rhs) { return static_cast(lhs.x()) * rhs.x() + static_cast(lhs.y()) * rhs.y(); } Vector2dF ScaleVector2d(const Vector2dF& v, float x_scale, float y_scale) { Vector2dF scaled_v(v); scaled_v.Scale(x_scale, y_scale); return scaled_v; } } // namespace math } // namespace cobalt