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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qdoublevector3d_p.h"
#include "qdoublevector2d_p.h"
#include <QtCore/qmath.h>
#include <QtCore/qdebug.h>
QT_BEGIN_NAMESPACE
QDoubleVector3D::QDoubleVector3D(const QDoubleVector2D& vector)
{
xp = vector.xp;
yp = vector.yp;
zp = 0.0;
}
QDoubleVector3D::QDoubleVector3D(const QDoubleVector2D& vector, double zpos)
{
xp = vector.xp;
yp = vector.yp;
zp = zpos;
}
QDoubleVector3D QDoubleVector3D::normalized() const
{
// Need some extra precision if the length is very small.
double len = double(xp) * double(xp) +
double(yp) * double(yp) +
double(zp) * double(zp);
if (qFuzzyIsNull(len - 1.0))
return *this;
else if (!qFuzzyIsNull(len))
return *this / qSqrt(len);
else
return QDoubleVector3D();
}
void QDoubleVector3D::normalize()
{
// Need some extra precision if the length is very small.
double len = double(xp) * double(xp) +
double(yp) * double(yp) +
double(zp) * double(zp);
if (qFuzzyIsNull(len - 1.0) || qFuzzyIsNull(len))
return;
len = qSqrt(len);
xp /= len;
yp /= len;
zp /= len;
}
double QDoubleVector3D::dotProduct(const QDoubleVector3D& v1, const QDoubleVector3D& v2)
{
return v1.xp * v2.xp + v1.yp * v2.yp + v1.zp * v2.zp;
}
QDoubleVector3D QDoubleVector3D::crossProduct(const QDoubleVector3D& v1, const QDoubleVector3D& v2)
{
return QDoubleVector3D(v1.yp * v2.zp - v1.zp * v2.yp,
v1.zp * v2.xp - v1.xp * v2.zp,
v1.xp * v2.yp - v1.yp * v2.xp);
}
QDoubleVector3D QDoubleVector3D::normal(const QDoubleVector3D& v1, const QDoubleVector3D& v2)
{
return crossProduct(v1, v2).normalized();
}
QDoubleVector3D QDoubleVector3D::normal
(const QDoubleVector3D& v1, const QDoubleVector3D& v2, const QDoubleVector3D& v3)
{
return crossProduct((v2 - v1), (v3 - v1)).normalized();
}
double QDoubleVector3D::distanceToPlane
(const QDoubleVector3D& plane, const QDoubleVector3D& normal) const
{
return dotProduct(*this - plane, normal);
}
double QDoubleVector3D::distanceToPlane
(const QDoubleVector3D& plane1, const QDoubleVector3D& plane2, const QDoubleVector3D& plane3) const
{
QDoubleVector3D n = normal(plane2 - plane1, plane3 - plane1);
return dotProduct(*this - plane1, n);
}
double QDoubleVector3D::distanceToLine
(const QDoubleVector3D& point, const QDoubleVector3D& direction) const
{
if (direction.isNull())
return (*this - point).length();
QDoubleVector3D p = point + dotProduct(*this - point, direction) * direction;
return (*this - p).length();
}
QDoubleVector2D QDoubleVector3D::toVector2D() const
{
return QDoubleVector2D(xp, yp);
}
double QDoubleVector3D::length() const
{
return qSqrt(xp * xp + yp * yp + zp * zp);
}
double QDoubleVector3D::lengthSquared() const
{
return xp * xp + yp * yp + zp * zp;
}
#ifndef QT_NO_DEBUG_STREAM
QDebug operator<<(QDebug dbg, const QDoubleVector3D &vector)
{
dbg.nospace() << "QDoubleVector3D("
<< vector.x() << ", " << vector.y() << ", " << vector.z() << ')';
return dbg.space();
}
#endif
#ifndef QT_NO_DATASTREAM
QDataStream &operator<<(QDataStream &stream, const QDoubleVector3D &vector)
{
stream << double(vector.x()) << double(vector.y())
<< double(vector.z());
return stream;
}
QDataStream &operator>>(QDataStream &stream, QDoubleVector3D &vector)
{
double x, y, z;
stream >> x;
stream >> y;
stream >> z;
vector.setX(double(x));
vector.setY(double(y));
vector.setZ(double(z));
return stream;
}
#endif // QT_NO_DATASTREAM
QT_END_NAMESPACE
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