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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtPositioning module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qdoublevector2d_p.h"
#include "qdoublevector3d_p.h"
#include <QtCore/qdatastream.h>
#include <QtCore/qdebug.h>
#include <QtCore/qmath.h>
QT_BEGIN_NAMESPACE
QDoubleVector2D::QDoubleVector2D(const QDoubleVector3D &vector) :
xp(vector.xp), yp(vector.yp)
{
}
double QDoubleVector2D::length() const
{
return qSqrt(xp * xp + yp * yp);
}
QDoubleVector2D QDoubleVector2D::normalized() const
{
// Need some extra precision if the length is very small.
double len = double(xp) * double(xp) +
double(yp) * double(yp);
if (qFuzzyIsNull(len - 1.0))
return *this;
else if (!qFuzzyIsNull(len))
return *this / (double)qSqrt(len);
else
return QDoubleVector2D();
}
void QDoubleVector2D::normalize()
{
// Need some extra precision if the length is very small.
double len = double(xp) * double(xp) +
double(yp) * double(yp);
if (qFuzzyIsNull(len - 1.0) || qFuzzyIsNull(len))
return;
len = qSqrt(len);
xp /= len;
yp /= len;
}
QDoubleVector3D QDoubleVector2D::toVector3D() const
{
return QDoubleVector3D(xp, yp, 0.0);
}
#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QDoubleVector2D &vector)
{
QDebugStateSaver saver(dbg);
dbg.nospace() << "QDoubleVector2D(" << vector.x() << ", " << vector.y() << ')';
return dbg;
}
#endif
#ifndef QT_NO_DATASTREAM
QDataStream &operator<<(QDataStream &stream, const QDoubleVector2D &vector)
{
stream << double(vector.x()) << double(vector.y());
return stream;
}
QDataStream &operator>>(QDataStream &stream, QDoubleVector2D &vector)
{
double x, y;
stream >> x;
stream >> y;
vector.setX(double(x));
vector.setY(double(y));
return stream;
}
#endif // QT_NO_DATASTREAM
QT_END_NAMESPACE
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