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| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the QtPositioning module of the Qt Toolkit. |
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| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #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 |