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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** GNU Free Documentation License
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of
** this file.
**
** 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.
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\headerfile <QtCore/qmath.h>
\title Math Functions
\ingroup funclists
\brief The <QtCore/qmath.h> header provides various math functions.
\pagekeywords math trigonometry qmath floor ceiling absolute sine cosine tangent inverse tan exponent power natural logarithm
*/
/*!
\fn int qCeil(qreal v)
Return the ceiling of the value \a v.
The ceiling is the smallest integer that is not less than \a v.
For example, if \a v is 41.2, then the ceiling is 42.
\relates <QtCore/qmath.h>
\sa qFloor()
*/
/*!
\fn int qFloor(qreal v)
Return the floor of the value \a v.
The floor is the largest integer that is not greater than \a v.
For example, if \a v is 41.2, then the floor is 41.
\relates <QtCore/qmath.h>
\sa qCeil()
*/
/*!
\fn qreal qFabs(qreal v)
Returns the absolute value of \a v as a qreal.
*/
/*!
\fn qreal qSin(qreal v)
Returns the sine of the angle \a v in radians.
\relates <QtCore/qmath.h>
\sa qCos(), qTan()
*/
/*!
\fn qreal qCos(qreal v)
Returns the cosine of an angle \a v in radians.
\relates <QtCore/qmath.h>
\sa qSin(), qTan()
*/
/*!
\fn qreal qTan(qreal v)
Returns the tangent of an angle \a v in radians.
\relates <QtCore/qmath.h>
\sa qSin(), qCos()
*/
/*!
\fn qreal qAcos(qreal v)
Returns the arccosine of \a v as an angle in radians.
Arccosine is the inverse operation of cosine.
\relates <QtCore/qmath.h>
\sa qAtan(), qAsin(), qCos()
*/
/*!
\fn qreal qAsin(qreal v)
Returns the arcsine of \a v as an angle in radians.
Arcsine is the inverse operation of sine.
\relates <QtCore/qmath.h>
\sa qSin(), qAtan(), qAcos()
*/
/*!
\fn qreal qAtan(qreal v)
Returns the arctangent of \a v as an angle in radians.
Arctangent is the inverse operation of tangent.
\relates <QtCore/qmath.h>
\sa qTan(), qAcos(), qAsin()
*/
/*!
\fn qreal qAtan2(qreal x, qreal y)
Returns the arctangent of a point specified by the coordinates \a x and \a y.
This function will return the angle and its direction.
\relates <QtCore/qmath.h>
\sa qAtan()
*/
/*!
\fn qreal qSqrt(qreal v)
Returns the square root of \a v.
This function returns a NaN if \a v is a negative number.
\relates <QtCore/qmath.h>
\sa qPow()
*/
/*!
\fn qreal qLn(qreal v)
Returns the natural logarithm of \a v. Natural logarithm uses base e.
\relates <QtCore/qmath.h>
\sa qExp()
*/
/*!
\fn qreal qExp(qreal v)
Returns the exponential function of \c e to the power of \a v.
\relates <QtCore/qmath.h>
\sa qLn()
*/
/*!
\fn qreal qPow(qreal x, qreal y)
Returns the value of \a x raised to the power of \a y.
That is, \a x is the base and \a y is the exponent.
\relates <QtCore/qmath.h>
\sa qSqrt()
*/
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