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<title>Qt 4.6: QVector4D Class Reference</title>
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<td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title">QVector4D Class Reference<br /><span class="small-subtitle">[<a href="qtgui.html">QtGui</a> module]</span>
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<p>The QVector4D class represents a vector or vertex in 4D space. <a href="#details">More...</a></p>
<pre> #include <QVector4D></pre><p>This class was introduced in Qt 4.6.</p>
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<li><a href="qvector4d-members.html">List of all members, including inherited members</a></li>
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<a name="public-functions"></a>
<h2>Public Functions</h2>
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<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#QVector4D">QVector4D</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#QVector4D-2">QVector4D</a></b> ( qreal <i>xpos</i>, qreal <i>ypos</i>, qreal <i>zpos</i>, qreal <i>wpos</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#QVector4D-3">QVector4D</a></b> ( const QPoint & <i>point</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#QVector4D-4">QVector4D</a></b> ( const QPointF & <i>point</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#QVector4D-5">QVector4D</a></b> ( const QVector2D & <i>vector</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#QVector4D-6">QVector4D</a></b> ( const QVector2D & <i>vector</i>, qreal <i>zpos</i>, qreal <i>wpos</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#QVector4D-7">QVector4D</a></b> ( const QVector3D & <i>vector</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#QVector4D-8">QVector4D</a></b> ( const QVector3D & <i>vector</i>, qreal <i>wpos</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#isNull">isNull</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">qreal </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#length">length</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">qreal </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#lengthSquared">lengthSquared</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#normalize">normalize</a></b> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVector4D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#normalized">normalized</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#setW">setW</a></b> ( qreal <i>w</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#setX">setX</a></b> ( qreal <i>x</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#setY">setY</a></b> ( qreal <i>y</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#setZ">setZ</a></b> ( qreal <i>z</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QPoint </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#toPoint">toPoint</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QPointF </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#toPointF">toPointF</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVector2D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#toVector2D">toVector2D</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVector2D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#toVector2DAffine">toVector2DAffine</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVector3D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#toVector3D">toVector3D</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVector3D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#toVector3DAffine">toVector3DAffine</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">qreal </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#w">w</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">qreal </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#x">x</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">qreal </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#y">y</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">qreal </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#z">z</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"></td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-QVariant">operator QVariant</a></b> () const</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVector4D & </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-2a-eq">operator*=</a></b> ( qreal <i>factor</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVector4D & </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-2a-eq-2">operator*=</a></b> ( const QVector4D & <i>vector</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVector4D & </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-2b-eq">operator+=</a></b> ( const QVector4D & <i>vector</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVector4D & </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator--eq">operator-=</a></b> ( const QVector4D & <i>vector</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QVector4D & </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-2f-eq">operator/=</a></b> ( qreal <i>divisor</i> )</td></tr>
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<a name="static-public-members"></a>
<h2>Static Public Members</h2>
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<tr><td class="memItemLeft" align="right" valign="top">qreal </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#dotProduct">dotProduct</a></b> ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</td></tr>
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<a name="related-non-members"></a>
<h2>Related Non-Members</h2>
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<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#qFuzzyCompare-7">qFuzzyCompare</a></b> ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-not-eq-55">operator!=</a></b> ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const QVector4D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-2a-49">operator*</a></b> ( qreal <i>factor</i>, const QVector4D & <i>vector</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const QVector4D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-2a-50">operator*</a></b> ( const QVector4D & <i>vector</i>, qreal <i>factor</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const QVector4D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-2a-51">operator*</a></b> ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const QVector4D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-2b-39">operator+</a></b> ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const QVector4D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator--16">operator-</a></b> ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const QVector4D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator--24">operator-</a></b> ( const QVector4D & <i>vector</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const QVector4D </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-2f-10">operator/</a></b> ( const QVector4D & <i>vector</i>, qreal <i>divisor</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QDataStream & </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-lt-lt-176">operator<<</a></b> ( QDataStream & <i>stream</i>, const QVector4D & <i>vector</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-eq-eq-78">operator==</a></b> ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">QDataStream & </td><td class="memItemRight" valign="bottom"><b><a href="qvector4d.html#operator-gt-gt-99">operator>></a></b> ( QDataStream & <i>stream</i>, QVector4D & <i>vector</i> )</td></tr>
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<a name="details"></a>
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<h2>Detailed Description</h2>
<p>The QVector4D class represents a vector or vertex in 4D space.</p>
<p>The QVector4D class can also be used to represent vertices in 4D space. We therefore do not need to provide a separate vertex class.</p>
<p>See also <a href="qquaternion.html">QQuaternion</a>, <a href="qvector2d.html">QVector2D</a>, and <a href="qvector3d.html">QVector3D</a>.</p>
<hr />
<h2>Member Function Documentation</h2>
<a name="//apple_ref/cpp/instm/QVector4D/QVector4D"></a>
<h3 class="fn"><a name="QVector4D"></a>QVector4D::QVector4D ()</h3>
<p>Constructs a null vector, i.e. with coordinates (0, 0, 0, 0).</p>
<h3 class="fn"><a name="QVector4D-2"></a>QVector4D::QVector4D ( <a href="qtglobal.html#qreal-typedef">qreal</a> <i>xpos</i>, <a href="qtglobal.html#qreal-typedef">qreal</a> <i>ypos</i>, <a href="qtglobal.html#qreal-typedef">qreal</a> <i>zpos</i>, <a href="qtglobal.html#qreal-typedef">qreal</a> <i>wpos</i> )</h3>
<p>Constructs a vector with coordinates (<i>xpos</i>, <i>ypos</i>, <i>zpos</i>, <i>wpos</i>).</p>
<h3 class="fn"><a name="QVector4D-3"></a>QVector4D::QVector4D ( const <a href="qpoint.html">QPoint</a> & <i>point</i> )</h3>
<p>Constructs a vector with x and y coordinates from a 2D <i>point</i>, and z and w coordinates of 0.</p>
<h3 class="fn"><a name="QVector4D-4"></a>QVector4D::QVector4D ( const <a href="qpointf.html">QPointF</a> & <i>point</i> )</h3>
<p>Constructs a vector with x and y coordinates from a 2D <i>point</i>, and z and w coordinates of 0.</p>
<h3 class="fn"><a name="QVector4D-5"></a>QVector4D::QVector4D ( const <a href="qvector2d.html">QVector2D</a> & <i>vector</i> )</h3>
<p>Constructs a 4D vector from the specified 2D <i>vector</i>. The z and w coordinates are set to zero.</p>
<p>See also <a href="qvector4d.html#toVector2D">toVector2D</a>().</p>
<h3 class="fn"><a name="QVector4D-6"></a>QVector4D::QVector4D ( const <a href="qvector2d.html">QVector2D</a> & <i>vector</i>, <a href="qtglobal.html#qreal-typedef">qreal</a> <i>zpos</i>, <a href="qtglobal.html#qreal-typedef">qreal</a> <i>wpos</i> )</h3>
<p>Constructs a 4D vector from the specified 2D <i>vector</i>. The z and w coordinates are set to <i>zpos</i> and <i>wpos</i> respectively.</p>
<p>See also <a href="qvector4d.html#toVector2D">toVector2D</a>().</p>
<h3 class="fn"><a name="QVector4D-7"></a>QVector4D::QVector4D ( const <a href="qvector3d.html">QVector3D</a> & <i>vector</i> )</h3>
<p>Constructs a 4D vector from the specified 3D <i>vector</i>. The w coordinate is set to zero.</p>
<p>See also <a href="qvector4d.html#toVector3D">toVector3D</a>().</p>
<h3 class="fn"><a name="QVector4D-8"></a>QVector4D::QVector4D ( const <a href="qvector3d.html">QVector3D</a> & <i>vector</i>, <a href="qtglobal.html#qreal-typedef">qreal</a> <i>wpos</i> )</h3>
<p>Constructs a 4D vector from the specified 3D <i>vector</i>. The w coordinate is set to <i>wpos</i>.</p>
<p>See also <a href="qvector4d.html#toVector3D">toVector3D</a>().</p>
<a name="//apple_ref/cpp/clm/QVector4D/dotProduct"></a>
<h3 class="fn"><a name="dotProduct"></a><a href="qtglobal.html#qreal-typedef">qreal</a> QVector4D::dotProduct ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> ) <tt> [static]</tt></h3>
<p>Returns the dot product of <i>v1</i> and <i>v2</i>.</p>
<a name="//apple_ref/cpp/instm/QVector4D/isNull"></a>
<h3 class="fn"><a name="isNull"></a>bool QVector4D::isNull () const</h3>
<p>Returns true if the x, y, z, and w coordinates are set to 0.0, otherwise returns false.</p>
<a name="//apple_ref/cpp/instm/QVector4D/length"></a>
<h3 class="fn"><a name="length"></a><a href="qtglobal.html#qreal-typedef">qreal</a> QVector4D::length () const</h3>
<p>Returns the length of the vector from the origin.</p>
<p>See also <a href="qvector4d.html#lengthSquared">lengthSquared</a>() and <a href="qvector4d.html#normalized">normalized</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/lengthSquared"></a>
<h3 class="fn"><a name="lengthSquared"></a><a href="qtglobal.html#qreal-typedef">qreal</a> QVector4D::lengthSquared () const</h3>
<p>Returns the squared length of the vector from the origin. This is equivalent to the dot product of the vector with itself.</p>
<p>See also <a href="qvector4d.html#length">length</a>() and <a href="qvector4d.html#dotProduct">dotProduct</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/normalize"></a>
<h3 class="fn"><a name="normalize"></a>void QVector4D::normalize ()</h3>
<p>Normalizes the currect vector in place. Nothing happens if this vector is a null vector or the length of the vector is very close to 1.</p>
<p>See also <a href="qvector4d.html#length">length</a>() and <a href="qvector4d.html#normalized">normalized</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/normalized"></a>
<h3 class="fn"><a name="normalized"></a>QVector4D QVector4D::normalized () const</h3>
<p>Returns the normalized unit vector form of this vector.</p>
<p>If this vector is null, then a null vector is returned. If the length of the vector is very close to 1, then the vector will be returned as-is. Otherwise the normalized form of the vector of length 1 will be returned.</p>
<p>See also <a href="qvector4d.html#length">length</a>() and <a href="qvector4d.html#normalize">normalize</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/setW"></a>
<h3 class="fn"><a name="setW"></a>void QVector4D::setW ( <a href="qtglobal.html#qreal-typedef">qreal</a> <i>w</i> )</h3>
<p>Sets the w coordinate of this point to the given <i>w</i> coordinate.</p>
<p>See also <a href="qvector4d.html#w">w</a>(), <a href="qvector4d.html#setX">setX</a>(), <a href="qvector4d.html#setY">setY</a>(), and <a href="qvector4d.html#setZ">setZ</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/setX"></a>
<h3 class="fn"><a name="setX"></a>void QVector4D::setX ( <a href="qtglobal.html#qreal-typedef">qreal</a> <i>x</i> )</h3>
<p>Sets the x coordinate of this point to the given <i>x</i> coordinate.</p>
<p>See also <a href="qvector4d.html#x">x</a>(), <a href="qvector4d.html#setY">setY</a>(), <a href="qvector4d.html#setZ">setZ</a>(), and <a href="qvector4d.html#setW">setW</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/setY"></a>
<h3 class="fn"><a name="setY"></a>void QVector4D::setY ( <a href="qtglobal.html#qreal-typedef">qreal</a> <i>y</i> )</h3>
<p>Sets the y coordinate of this point to the given <i>y</i> coordinate.</p>
<p>See also <a href="qvector4d.html#y">y</a>(), <a href="qvector4d.html#setX">setX</a>(), <a href="qvector4d.html#setZ">setZ</a>(), and <a href="qvector4d.html#setW">setW</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/setZ"></a>
<h3 class="fn"><a name="setZ"></a>void QVector4D::setZ ( <a href="qtglobal.html#qreal-typedef">qreal</a> <i>z</i> )</h3>
<p>Sets the z coordinate of this point to the given <i>z</i> coordinate.</p>
<p>See also <a href="qvector4d.html#z">z</a>(), <a href="qvector4d.html#setX">setX</a>(), <a href="qvector4d.html#setY">setY</a>(), and <a href="qvector4d.html#setW">setW</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/toPoint"></a>
<h3 class="fn"><a name="toPoint"></a><a href="qpoint.html">QPoint</a> QVector4D::toPoint () const</h3>
<p>Returns the <a href="qpoint.html">QPoint</a> form of this 4D vector. The z and w coordinates are dropped.</p>
<p>See also <a href="qvector4d.html#toPointF">toPointF</a>() and <a href="qvector4d.html#toVector2D">toVector2D</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/toPointF"></a>
<h3 class="fn"><a name="toPointF"></a><a href="qpointf.html">QPointF</a> QVector4D::toPointF () const</h3>
<p>Returns the <a href="qpointf.html">QPointF</a> form of this 4D vector. The z and w coordinates are dropped.</p>
<p>See also <a href="qvector4d.html#toPoint">toPoint</a>() and <a href="qvector4d.html#toVector2D">toVector2D</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/toVector2D"></a>
<h3 class="fn"><a name="toVector2D"></a><a href="qvector2d.html">QVector2D</a> QVector4D::toVector2D () const</h3>
<p>Returns the 2D vector form of this 4D vector, dropping the z and w coordinates.</p>
<p>See also <a href="qvector4d.html#toVector2DAffine">toVector2DAffine</a>(), <a href="qvector4d.html#toVector3D">toVector3D</a>(), and <a href="qvector4d.html#toPoint">toPoint</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/toVector2DAffine"></a>
<h3 class="fn"><a name="toVector2DAffine"></a><a href="qvector2d.html">QVector2D</a> QVector4D::toVector2DAffine () const</h3>
<p>Returns the 2D vector form of this 4D vector, dividing the x and y coordinates by the w coordinate and dropping the z coordinate. Returns a null vector if w is zero.</p>
<p>See also <a href="qvector4d.html#toVector2D">toVector2D</a>(), <a href="qvector4d.html#toVector3DAffine">toVector3DAffine</a>(), and <a href="qvector4d.html#toPoint">toPoint</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/toVector3D"></a>
<h3 class="fn"><a name="toVector3D"></a><a href="qvector3d.html">QVector3D</a> QVector4D::toVector3D () const</h3>
<p>Returns the 3D vector form of this 4D vector, dropping the w coordinate.</p>
<p>See also <a href="qvector4d.html#toVector3DAffine">toVector3DAffine</a>(), <a href="qvector4d.html#toVector2D">toVector2D</a>(), and <a href="qvector4d.html#toPoint">toPoint</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/toVector3DAffine"></a>
<h3 class="fn"><a name="toVector3DAffine"></a><a href="qvector3d.html">QVector3D</a> QVector4D::toVector3DAffine () const</h3>
<p>Returns the 3D vector form of this 4D vector, dividing the x, y, and z coordinates by the w coordinate. Returns a null vector if w is zero.</p>
<p>See also <a href="qvector4d.html#toVector3D">toVector3D</a>(), <a href="qvector4d.html#toVector2DAffine">toVector2DAffine</a>(), and <a href="qvector4d.html#toPoint">toPoint</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/w"></a>
<h3 class="fn"><a name="w"></a><a href="qtglobal.html#qreal-typedef">qreal</a> QVector4D::w () const</h3>
<p>Returns the w coordinate of this point.</p>
<p>See also <a href="qvector4d.html#setW">setW</a>(), <a href="qvector4d.html#x">x</a>(), <a href="qvector4d.html#y">y</a>(), and <a href="qvector4d.html#z">z</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/x"></a>
<h3 class="fn"><a name="x"></a><a href="qtglobal.html#qreal-typedef">qreal</a> QVector4D::x () const</h3>
<p>Returns the x coordinate of this point.</p>
<p>See also <a href="qvector4d.html#setX">setX</a>(), <a href="qvector4d.html#y">y</a>(), <a href="qvector4d.html#z">z</a>(), and <a href="qvector4d.html#w">w</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/y"></a>
<h3 class="fn"><a name="y"></a><a href="qtglobal.html#qreal-typedef">qreal</a> QVector4D::y () const</h3>
<p>Returns the y coordinate of this point.</p>
<p>See also <a href="qvector4d.html#setY">setY</a>(), <a href="qvector4d.html#x">x</a>(), <a href="qvector4d.html#z">z</a>(), and <a href="qvector4d.html#w">w</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/z"></a>
<h3 class="fn"><a name="z"></a><a href="qtglobal.html#qreal-typedef">qreal</a> QVector4D::z () const</h3>
<p>Returns the z coordinate of this point.</p>
<p>See also <a href="qvector4d.html#setZ">setZ</a>(), <a href="qvector4d.html#x">x</a>(), <a href="qvector4d.html#y">y</a>(), and <a href="qvector4d.html#w">w</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/operator QVariant"></a>
<h3 class="fn"><a name="operator-QVariant"></a>QVector4D::operator QVariant () const</h3>
<p>Returns the 4D vector as a <a href="qvariant.html">QVariant</a>.</p>
<a name="//apple_ref/cpp/instm/QVector4D/operator*="></a>
<h3 class="fn"><a name="operator-2a-eq"></a>QVector4D & QVector4D::operator*= ( <a href="qtglobal.html#qreal-typedef">qreal</a> <i>factor</i> )</h3>
<p>Multiplies this vector's coordinates by the given <i>factor</i>, and returns a reference to this vector.</p>
<p>See also <a href="qvector4d.html#operator-2f-eq">operator/=</a>().</p>
<h3 class="fn"><a name="operator-2a-eq-2"></a>QVector4D & QVector4D::operator*= ( const QVector4D & <i>vector</i> )</h3>
<p>Multiplies the components of this vector by the corresponding components in <i>vector</i>.</p>
<a name="//apple_ref/cpp/instm/QVector4D/operator+="></a>
<h3 class="fn"><a name="operator-2b-eq"></a>QVector4D & QVector4D::operator+= ( const QVector4D & <i>vector</i> )</h3>
<p>Adds the given <i>vector</i> to this vector and returns a reference to this vector.</p>
<p>See also <a href="qvector4d.html#operator--eq">operator-=</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/operator-="></a>
<h3 class="fn"><a name="operator--eq"></a>QVector4D & QVector4D::operator-= ( const QVector4D & <i>vector</i> )</h3>
<p>Subtracts the given <i>vector</i> from this vector and returns a reference to this vector.</p>
<p>See also <a href="qvector4d.html#operator-2b-eq">operator+=</a>().</p>
<a name="//apple_ref/cpp/instm/QVector4D/operator/="></a>
<h3 class="fn"><a name="operator-2f-eq"></a>QVector4D & QVector4D::operator/= ( <a href="qtglobal.html#qreal-typedef">qreal</a> <i>divisor</i> )</h3>
<p>Divides this vector's coordinates by the given <i>divisor</i>, and returns a reference to this vector.</p>
<p>See also <a href="qvector4d.html#operator-2a-eq">operator*=</a>().</p>
<hr />
<h2>Related Non-Members</h2>
<h3 class="fn"><a name="qFuzzyCompare-7"></a>bool qFuzzyCompare ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</h3>
<p>Returns true if <i>v1</i> and <i>v2</i> are equal, allowing for a small fuzziness factor for floating-point comparisons; false otherwise.</p>
<h3 class="fn"><a name="operator-not-eq-55"></a>bool operator!= ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</h3>
<p>Returns true if <i>v1</i> is not equal to <i>v2</i>; otherwise returns false. This operator uses an exact floating-point comparison.</p>
<h3 class="fn"><a name="operator-2a-49"></a>const QVector4D operator* ( <a href="qtglobal.html#qreal-typedef">qreal</a> <i>factor</i>, const QVector4D & <i>vector</i> )</h3>
<p>Returns a copy of the given <i>vector</i>, multiplied by the given <i>factor</i>.</p>
<p>See also <a href="qvector4d.html#operator-2a-eq">QVector4D::operator*=</a>().</p>
<h3 class="fn"><a name="operator-2a-50"></a>const QVector4D operator* ( const QVector4D & <i>vector</i>, <a href="qtglobal.html#qreal-typedef">qreal</a> <i>factor</i> )</h3>
<p>Returns a copy of the given <i>vector</i>, multiplied by the given <i>factor</i>.</p>
<p>See also <a href="qvector4d.html#operator-2a-eq">QVector4D::operator*=</a>().</p>
<h3 class="fn"><a name="operator-2a-51"></a>const QVector4D operator* ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</h3>
<p>Returns the vector consisting of the multiplication of the components from <i>v1</i> and <i>v2</i>.</p>
<p>See also <a href="qvector4d.html#operator-2a-eq">QVector4D::operator*=</a>().</p>
<h3 class="fn"><a name="operator-2b-39"></a>const QVector4D operator+ ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</h3>
<p>Returns a <a href="qvector4d.html">QVector4D</a> object that is the sum of the given vectors, <i>v1</i> and <i>v2</i>; each component is added separately.</p>
<p>See also <a href="qvector4d.html#operator-2b-eq">QVector4D::operator+=</a>().</p>
<h3 class="fn"><a name="operator--16"></a>const QVector4D operator- ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</h3>
<p>Returns a <a href="qvector4d.html">QVector4D</a> object that is formed by subtracting <i>v2</i> from <i>v1</i>; each component is subtracted separately.</p>
<p>See also <a href="qvector4d.html#operator--eq">QVector4D::operator-=</a>().</p>
<h3 class="fn"><a name="operator--24"></a>const QVector4D operator- ( const QVector4D & <i>vector</i> )</h3>
<p>This is an overloaded function.</p>
<p>Returns a <a href="qvector4d.html">QVector4D</a> object that is formed by changing the sign of all three components of the given <i>vector</i>.</p>
<p>Equivalent to <tt>QVector4D(0,0,0,0) - vector</tt>.</p>
<h3 class="fn"><a name="operator-2f-10"></a>const QVector4D operator/ ( const QVector4D & <i>vector</i>, <a href="qtglobal.html#qreal-typedef">qreal</a> <i>divisor</i> )</h3>
<p>Returns the <a href="qvector4d.html">QVector4D</a> object formed by dividing all four components of the given <i>vector</i> by the given <i>divisor</i>.</p>
<p>See also <a href="qvector4d.html#operator-2f-eq">QVector4D::operator/=</a>().</p>
<h3 class="fn"><a name="operator-lt-lt-176"></a><a href="qdatastream.html">QDataStream</a> & operator<< ( <a href="qdatastream.html">QDataStream</a> & <i>stream</i>, const QVector4D & <i>vector</i> )</h3>
<p>Writes the given <i>vector</i> to the given <i>stream</i> and returns a reference to the stream.</p>
<p>See also <a href="datastreamformat.html">Format of the QDataStream Operators</a>.</p>
<h3 class="fn"><a name="operator-eq-eq-78"></a>bool operator== ( const QVector4D & <i>v1</i>, const QVector4D & <i>v2</i> )</h3>
<p>Returns true if <i>v1</i> is equal to <i>v2</i>; otherwise returns false. This operator uses an exact floating-point comparison.</p>
<h3 class="fn"><a name="operator-gt-gt-99"></a><a href="qdatastream.html">QDataStream</a> & operator>> ( <a href="qdatastream.html">QDataStream</a> & <i>stream</i>, QVector4D & <i>vector</i> )</h3>
<p>Reads a 4D vector from the given <i>stream</i> into the given <i>vector</i> and returns a reference to the stream.</p>
<p>See also <a href="datastreamformat.html">Format of the QDataStream Operators</a>.</p>
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