1 /****************************************************************************
2 **
3 ** Copyright (C) 2016 The Qt Company Ltd.
4 ** Contact: https://www.qt.io/licensing/
5 **
6 ** This file is part of the QtPositioning module of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial License Usage
10 ** Licensees holding valid commercial Qt licenses may use this file in
11 ** accordance with the commercial license agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and The Qt Company. For licensing terms
14 ** and conditions see https://www.qt.io/terms-conditions. For further
15 ** information use the contact form at https://www.qt.io/contact-us.
16 **
17 ** GNU Lesser General Public License Usage
18 ** Alternatively, this file may be used under the terms of the GNU Lesser
19 ** General Public License version 3 as published by the Free Software
20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the
21 ** packaging of this file. Please review the following information to
22 ** ensure the GNU Lesser General Public License version 3 requirements
23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24 **
25 ** GNU General Public License Usage
26 ** Alternatively, this file may be used under the terms of the GNU
27 ** General Public License version 2.0 or (at your option) the GNU General
28 ** Public license version 3 or any later version approved by the KDE Free
29 ** Qt Foundation. The licenses are as published by the Free Software
30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31 ** included in the packaging of this file. Please review the following
32 ** information to ensure the GNU General Public License requirements will
33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34 ** https://www.gnu.org/licenses/gpl-3.0.html.
35 **
36 ** $QT_END_LICENSE$
37 **
38 ****************************************************************************/
39
40 #include "qdoublevector2d_p.h"
41 #include "qdoublevector3d_p.h"
42 #include <QtCore/qdatastream.h>
43 #include <QtCore/qdebug.h>
44 #include <QtCore/qmath.h>
45
46 QT_BEGIN_NAMESPACE
47
QDoubleVector2D(const QDoubleVector3D & vector)48 QDoubleVector2D::QDoubleVector2D(const QDoubleVector3D &vector) :
49 xp(vector.xp), yp(vector.yp)
50 {
51 }
52
length() const53 double QDoubleVector2D::length() const
54 {
55 return qSqrt(xp * xp + yp * yp);
56 }
57
normalized() const58 QDoubleVector2D QDoubleVector2D::normalized() const
59 {
60 // Need some extra precision if the length is very small.
61 double len = double(xp) * double(xp) +
62 double(yp) * double(yp);
63 if (qFuzzyIsNull(len - 1.0))
64 return *this;
65 else if (!qFuzzyIsNull(len))
66 return *this / (double)qSqrt(len);
67 else
68 return QDoubleVector2D();
69 }
70
normalize()71 void QDoubleVector2D::normalize()
72 {
73 // Need some extra precision if the length is very small.
74 double len = double(xp) * double(xp) +
75 double(yp) * double(yp);
76 if (qFuzzyIsNull(len - 1.0) || qFuzzyIsNull(len))
77 return;
78
79 len = qSqrt(len);
80
81 xp /= len;
82 yp /= len;
83 }
84
toVector3D() const85 QDoubleVector3D QDoubleVector2D::toVector3D() const
86 {
87 return QDoubleVector3D(xp, yp, 0.0);
88 }
89
90 #ifndef QT_NO_DEBUG_STREAM
91
operator <<(QDebug dbg,const QDoubleVector2D & vector)92 QDebug operator<<(QDebug dbg, const QDoubleVector2D &vector)
93 {
94 QDebugStateSaver saver(dbg);
95 dbg.nospace() << "QDoubleVector2D(" << vector.x() << ", " << vector.y() << ')';
96 return dbg;
97 }
98
99 #endif
100
101 #ifndef QT_NO_DATASTREAM
102
operator <<(QDataStream & stream,const QDoubleVector2D & vector)103 QDataStream &operator<<(QDataStream &stream, const QDoubleVector2D &vector)
104 {
105 stream << double(vector.x()) << double(vector.y());
106 return stream;
107 }
108
operator >>(QDataStream & stream,QDoubleVector2D & vector)109 QDataStream &operator>>(QDataStream &stream, QDoubleVector2D &vector)
110 {
111 double x, y;
112 stream >> x;
113 stream >> y;
114 vector.setX(double(x));
115 vector.setY(double(y));
116 return stream;
117 }
118
119 #endif // QT_NO_DATASTREAM
120
121 QT_END_NAMESPACE
122