qdoublevector2d.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#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