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61 lines
1.4 KiB
61 lines
1.4 KiB
4 months ago
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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "ui/gfx/geometry/vector2d_f.h"
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#include <cmath>
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#include "base/strings/stringprintf.h"
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namespace gfx {
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std::string Vector2dF::ToString() const {
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return base::StringPrintf("[%f %f]", x_, y_);
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}
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bool Vector2dF::IsZero() const {
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return x_ == 0 && y_ == 0;
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}
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void Vector2dF::Add(const Vector2dF& other) {
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x_ += other.x_;
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y_ += other.y_;
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}
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void Vector2dF::Subtract(const Vector2dF& other) {
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x_ -= other.x_;
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y_ -= other.y_;
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}
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double Vector2dF::LengthSquared() const {
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return static_cast<double>(x_) * x_ + static_cast<double>(y_) * y_;
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}
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float Vector2dF::Length() const {
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return static_cast<float>(std::sqrt(LengthSquared()));
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}
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void Vector2dF::Scale(float x_scale, float y_scale) {
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x_ *= x_scale;
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y_ *= y_scale;
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}
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double CrossProduct(const Vector2dF& lhs, const Vector2dF& rhs) {
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return static_cast<double>(lhs.x()) * rhs.y() -
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static_cast<double>(lhs.y()) * rhs.x();
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}
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double DotProduct(const Vector2dF& lhs, const Vector2dF& rhs) {
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return static_cast<double>(lhs.x()) * rhs.x() +
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static_cast<double>(lhs.y()) * rhs.y();
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}
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Vector2dF ScaleVector2d(const Vector2dF& v, float x_scale, float y_scale) {
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Vector2dF scaled_v(v);
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scaled_v.Scale(x_scale, y_scale);
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return scaled_v;
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}
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} // namespace gfx
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