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<h1 class="title"><QtCore/qmath.h> - Math Functions</h1>
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<!-- $$$<QtCore/qmath.h>-brief -->
<p>The <<a href="qtcore.html">QtCore</a>/qmath.h> header provides various math functions. <a href="#details">More...</a></p>
<!-- @@@<QtCore/qmath.h> -->
<ul>
</ul>
<a name="Functionsx"></a>
<h2>Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qAcos">qAcos</a></b> ( qreal <i>v</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qAsin">qAsin</a></b> ( qreal <i>v</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qAtan2">qAtan2</a></b> ( qreal <i>y</i>, qreal <i>x</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qAtan">qAtan</a></b> ( qreal <i>v</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qCeil">qCeil</a></b> ( qreal <i>v</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qCos">qCos</a></b> ( qreal <i>v</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qExp">qExp</a></b> ( qreal <i>v</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> int </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qFloor">qFloor</a></b> ( qreal <i>v</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qLn">qLn</a></b> ( qreal <i>v</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qPow">qPow</a></b> ( qreal <i>x</i>, qreal <i>y</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qSin">qSin</a></b> ( qreal <i>v</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qSqrt">qSqrt</a></b> ( qreal <i>v</i> )</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> qreal </td><td class="memItemRight bottomAlign"><b><a href="qtcore-qmath-h.html#qTan">qTan</a></b> ( qreal <i>v</i> )</td></tr>
</table>
<!-- $$$<QtCore/qmath.h>-description -->
<div class="descr"> <a name="details"></a>
</div>
<!-- @@@<QtCore/qmath.h> -->
<h2>Function Documentation</h2>
<!-- $$$qAcos[overload1]$$$qAcosqreal -->
<h3 class="fn"><a name="qAcos"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qAcos</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Returns the arccosine of <i>v</i> as an angle in radians. Arccosine is the inverse operation of cosine.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qAtan">qAtan</a>(), <a href="qtcore-qmath-h.html#qAsin">qAsin</a>(), and <a href="qtcore-qmath-h.html#qCos">qCos</a>().</p>
<!-- @@@qAcos -->
<!-- $$$qAsin[overload1]$$$qAsinqreal -->
<h3 class="fn"><a name="qAsin"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qAsin</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Returns the arcsine of <i>v</i> as an angle in radians. Arcsine is the inverse operation of sine.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qSin">qSin</a>(), <a href="qtcore-qmath-h.html#qAtan">qAtan</a>(), and <a href="qtcore-qmath-h.html#qAcos">qAcos</a>().</p>
<!-- @@@qAsin -->
<!-- $$$qAtan2[overload1]$$$qAtan2qrealqreal -->
<h3 class="fn"><a name="qAtan2"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qAtan2</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>y</i>, <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>x</i> )</h3>
<p>Returns the arctangent of a point specified by the coordinates <i>y</i> and <i>x</i>. This function will return the angle (argument) of that point.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qAtan">qAtan</a>().</p>
<!-- @@@qAtan2 -->
<!-- $$$qAtan[overload1]$$$qAtanqreal -->
<h3 class="fn"><a name="qAtan"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qAtan</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Returns the arctangent of <i>v</i> as an angle in radians. Arctangent is the inverse operation of tangent.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qTan">qTan</a>(), <a href="qtcore-qmath-h.html#qAcos">qAcos</a>(), and <a href="qtcore-qmath-h.html#qAsin">qAsin</a>().</p>
<!-- @@@qAtan -->
<!-- $$$qCeil[overload1]$$$qCeilqreal -->
<h3 class="fn"><a name="qCeil"></a><span class="type">int</span> <span class="name">qCeil</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Return the ceiling of the value <i>v</i>.</p>
<p>The ceiling is the smallest integer that is not less than <i>v</i>. For example, if <i>v</i> is 41.2, then the ceiling is 42.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qFloor">qFloor</a>().</p>
<!-- @@@qCeil -->
<!-- $$$qCos[overload1]$$$qCosqreal -->
<h3 class="fn"><a name="qCos"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qCos</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Returns the cosine of an angle <i>v</i> in radians.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qSin">qSin</a>() and <a href="qtcore-qmath-h.html#qTan">qTan</a>().</p>
<!-- @@@qCos -->
<!-- $$$qExp[overload1]$$$qExpqreal -->
<h3 class="fn"><a name="qExp"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qExp</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Returns the exponential function of <tt>e</tt> to the power of <i>v</i>.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qLn">qLn</a>().</p>
<!-- @@@qExp -->
<!-- $$$qFloor[overload1]$$$qFloorqreal -->
<h3 class="fn"><a name="qFloor"></a><span class="type">int</span> <span class="name">qFloor</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Return the floor of the value <i>v</i>.</p>
<p>The floor is the largest integer that is not greater than <i>v</i>. For example, if <i>v</i> is 41.2, then the floor is 41.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qCeil">qCeil</a>().</p>
<!-- @@@qFloor -->
<!-- $$$qLn[overload1]$$$qLnqreal -->
<h3 class="fn"><a name="qLn"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qLn</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Returns the natural logarithm of <i>v</i>. Natural logarithm uses base e.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qExp">qExp</a>().</p>
<!-- @@@qLn -->
<!-- $$$qPow[overload1]$$$qPowqrealqreal -->
<h3 class="fn"><a name="qPow"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qPow</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>x</i>, <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>y</i> )</h3>
<p>Returns the value of <i>x</i> raised to the power of <i>y</i>. That is, <i>x</i> is the base and <i>y</i> is the exponent.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qSqrt">qSqrt</a>().</p>
<!-- @@@qPow -->
<!-- $$$qSin[overload1]$$$qSinqreal -->
<h3 class="fn"><a name="qSin"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qSin</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Returns the sine of the angle <i>v</i> in radians.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qCos">qCos</a>() and <a href="qtcore-qmath-h.html#qTan">qTan</a>().</p>
<!-- @@@qSin -->
<!-- $$$qSqrt[overload1]$$$qSqrtqreal -->
<h3 class="fn"><a name="qSqrt"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qSqrt</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Returns the square root of <i>v</i>. This function returns a NaN if <i>v</i> is a negative number.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qPow">qPow</a>().</p>
<!-- @@@qSqrt -->
<!-- $$$qTan[overload1]$$$qTanqreal -->
<h3 class="fn"><a name="qTan"></a><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <span class="name">qTan</span> ( <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> <i>v</i> )</h3>
<p>Returns the tangent of an angle <i>v</i> in radians.</p>
<p><b>See also </b><a href="qtcore-qmath-h.html#qSin">qSin</a>() and <a href="qtcore-qmath-h.html#qCos">qCos</a>().</p>
<!-- @@@qTan -->
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