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<td >Qt 5.12</td><td ><a href="qt3d-index.html">Qt 3D</a></td><td ><a href="qt3d-cpp.html">C++ Classes</a></td><td >QSpotLight</td></tr></table><table class="buildversion"><tr>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#properties">Properties</a></li>
<li class="level1"><a href="#public-functions">Public Functions</a></li>
<li class="level1"><a href="#public-slots">Public Slots</a></li>
<li class="level1"><a href="#signals">Signals</a></li>
<li class="level1"><a href="#static-public-members">Static Public Members</a></li>
<li class="level1"><a href="#details">Detailed Description</a></li>
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<h1 class="title">QSpotLight Class</h1>
<span class="small-subtitle">(<a href="qt3drender-qspotlight.html">Qt3DRender::QSpotLight</a>)<br/></span>
<!-- $$$QSpotLight-brief -->
<p>Encapsulate a Spot Light object in a Qt 3D scene. <a href="#details">More...</a></p>
<!-- @@@QSpotLight -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign">   <span class="preprocessor">#include &lt;QSpotLight&gt;</span>
</td></tr><tr><td class="memItemLeft rightAlign topAlign"> qmake:</td><td class="memItemRight bottomAlign"> QT += 3drender</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  Qt 5.5</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Instantiated By:</td><td class="memItemRight bottomAlign"> <a href="qml-qt3d-render-spotlight.html">SpotLight</a></td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="qt3drender-qabstractlight.html">Qt3DRender::QAbstractLight</a></td></tr></table></div><ul>
<li><a href="qt3drender-qspotlight-members.html">List of all members, including inherited members</a></li>
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<a name="properties"></a>
<h2 id="properties">Properties</h2>
<div class="table"><table class="propsummary">
<tr><td class="topAlign"><ul>
<li class="fn"><b><a href="qt3drender-qspotlight.html#constantAttenuation-prop">constantAttenuation</a></b> : float</li>
<li class="fn"><b><a href="qt3drender-qspotlight.html#cutOffAngle-prop">cutOffAngle</a></b> : float</li>
<li class="fn"><b><a href="qt3drender-qspotlight.html#linearAttenuation-prop">linearAttenuation</a></b> : float</li>
</ul></td><td class="topAlign"><ul>
<li class="fn"><b><a href="qt3drender-qspotlight.html#localDirection-prop">localDirection</a></b> : QVector3D</li>
<li class="fn"><b><a href="qt3drender-qspotlight.html#quadraticAttenuation-prop">quadraticAttenuation</a></b> : float</li>
</ul>
</td></tr>
</table></div>
<ul>
<li class="fn">3 properties inherited from <a href="qt3drender-qabstractlight.html#properties">Qt3DRender::QAbstractLight</a></li>
<li class="fn">1 property inherited from <a href="qt3dcore-qcomponent.html#properties">Qt3DCore::QComponent</a></li>
<li class="fn">3 properties inherited from <a href="qt3dcore-qnode.html#properties">Qt3DCore::QNode</a></li>
</ul>
<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#QSpotLight">QSpotLight</a></b>(Qt3DCore::QNode *<i>parent</i> = nullptr)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> float </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#constantAttenuation-prop">constantAttenuation</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> float </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#cutOffAngle-prop">cutOffAngle</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> float </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#linearAttenuation-prop">linearAttenuation</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> QVector3D </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#localDirection-prop">localDirection</a></b>() const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> float </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#quadraticAttenuation-prop">quadraticAttenuation</a></b>() const</td></tr>
</table></div>
<ul>
<li class="fn">3 public functions inherited from <a href="qt3drender-qabstractlight.html#public-functions">Qt3DRender::QAbstractLight</a></li>
<li class="fn">2 public functions inherited from <a href="qt3dcore-qcomponent.html#public-functions">Qt3DCore::QComponent</a></li>
<li class="fn">13 public functions inherited from <a href="qt3dcore-qnode.html#public-functions">Qt3DCore::QNode</a></li>
</ul>
<a name="public-slots"></a>
<h2 id="public-slots">Public Slots</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#constantAttenuation-prop">setConstantAttenuation</a></b>(float <i>value</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#cutOffAngle-prop">setCutOffAngle</a></b>(float <i>cutOffAngle</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#linearAttenuation-prop">setLinearAttenuation</a></b>(float <i>value</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#localDirection-prop">setLocalDirection</a></b>(const QVector3D &amp;<i>localDirection</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#quadraticAttenuation-prop">setQuadraticAttenuation</a></b>(float <i>value</i>)</td></tr>
</table></div>
<ul>
<li class="fn">2 public slots inherited from <a href="qt3drender-qabstractlight.html#public-slots">Qt3DRender::QAbstractLight</a></li>
<li class="fn">1 public slot inherited from <a href="qt3dcore-qcomponent.html#public-slots">Qt3DCore::QComponent</a></li>
<li class="fn">3 public slots inherited from <a href="qt3dcore-qnode.html#public-slots">Qt3DCore::QNode</a></li>
</ul>
<a name="signals"></a>
<h2 id="signals">Signals</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#constantAttenuation-prop">constantAttenuationChanged</a></b>(float <i>constantAttenuation</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#cutOffAngle-prop">cutOffAngleChanged</a></b>(float <i>cutOffAngle</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#linearAttenuation-prop">linearAttenuationChanged</a></b>(float <i>linearAttenuation</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#localDirection-prop">localDirectionChanged</a></b>(const QVector3D &amp;<i>localDirection</i>)</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#quadraticAttenuation-prop">quadraticAttenuationChanged</a></b>(float <i>quadraticAttenuation</i>)</td></tr>
</table></div>
<ul>
<li class="fn">2 signals inherited from <a href="qt3drender-qabstractlight.html#signals">Qt3DRender::QAbstractLight</a></li>
<li class="fn">3 signals inherited from <a href="qt3dcore-qcomponent.html#signals">Qt3DCore::QComponent</a></li>
<li class="fn">4 signals inherited from <a href="qt3dcore-qnode.html#signals">Qt3DCore::QNode</a></li>
</ul>
<a name="static-public-members"></a>
<h2 id="static-public-members">Static Public Members</h2>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> const QMetaObject </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qspotlight.html#staticMetaObject-var">staticMetaObject</a></b></td></tr>
</table></div>
<h3>Additional Inherited Members</h3>
<ul>
<li class="fn">2 protected functions inherited from <a href="qt3dcore-qnode.html#protected-functions">Qt3DCore::QNode</a></li>
</ul>
<a name="details"></a>
<!-- $$$QSpotLight-description -->
<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>Encapsulate a Spot Light object in a Qt 3D scene.</p>
<p>A spotlight is a light source that emits a cone of light in a particular direction.</p>
<p>A spotlight uses three attenuation factors to describe how the intensity of the light decreases over distance. These factors are designed to be used together in calcuating total attenuation. For the materials in Qt3D Extras the following formula is used, where distance is the distance from the light to the surface being rendered:</p>
<pre class="cpp">

  totalAttenuation <span class="operator">=</span> <span class="number">1.0</span> <span class="operator">/</span> (constantAttenuation <span class="operator">+</span> (linearAttenuation <span class="operator">*</span> distance) <span class="operator">+</span> (quadraticAttenuation <span class="operator">*</span> distance <span class="operator">*</span> distance));

</pre>
<p>Custom materials may choose to interpret these factors differently.</p>
</div>
<!-- @@@QSpotLight -->
<div class="prop">
<h2>Property Documentation</h2>
<!-- $$$constantAttenuation-prop$$$constantAttenuation$$$setConstantAttenuationfloat$$$constantAttenuationChangedfloat -->
<h3 class="fn" id="constantAttenuation-prop"><a name="constantAttenuation-prop"></a><span class="name">constantAttenuation</span> : <span class="type">float</span></h3>
<p>Specifies the constant attenuation of the spot light</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> float </td><td class="memItemRight bottomAlign"><span class="name"><b>constantAttenuation</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setConstantAttenuation</b></span>(float <i>value</i>)</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>constantAttenuationChanged</b></span>(float <i>constantAttenuation</i>)</td></tr>
</table></div>
<!-- @@@constantAttenuation -->
<!-- $$$cutOffAngle-prop$$$cutOffAngle$$$setCutOffAnglefloat$$$cutOffAngleChangedfloat -->
<h3 class="fn" id="cutOffAngle-prop"><a name="cutOffAngle-prop"></a><span class="name">cutOffAngle</span> : <span class="type">float</span></h3>
<p>Specifies the cut off angle of the spot light</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> float </td><td class="memItemRight bottomAlign"><span class="name"><b>cutOffAngle</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setCutOffAngle</b></span>(float <i>cutOffAngle</i>)</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>cutOffAngleChanged</b></span>(float <i>cutOffAngle</i>)</td></tr>
</table></div>
<!-- @@@cutOffAngle -->
<!-- $$$linearAttenuation-prop$$$linearAttenuation$$$setLinearAttenuationfloat$$$linearAttenuationChangedfloat -->
<h3 class="fn" id="linearAttenuation-prop"><a name="linearAttenuation-prop"></a><span class="name">linearAttenuation</span> : <span class="type">float</span></h3>
<p>Specifies the linear attenuation of the spot light</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> float </td><td class="memItemRight bottomAlign"><span class="name"><b>linearAttenuation</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setLinearAttenuation</b></span>(float <i>value</i>)</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>linearAttenuationChanged</b></span>(float <i>linearAttenuation</i>)</td></tr>
</table></div>
<!-- @@@linearAttenuation -->
<!-- $$$localDirection-prop$$$localDirection$$$setLocalDirectionconstQVector3D&$$$localDirectionChangedconstQVector3D& -->
<h3 class="fn" id="localDirection-prop"><a name="localDirection-prop"></a><span class="name">localDirection</span> : <span class="type">QVector3D</span></h3>
<p>Specifies the local direction of the spot light</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> QVector3D </td><td class="memItemRight bottomAlign"><span class="name"><b>localDirection</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setLocalDirection</b></span>(const QVector3D &amp;<i>localDirection</i>)</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>localDirectionChanged</b></span>(const QVector3D &amp;<i>localDirection</i>)</td></tr>
</table></div>
<!-- @@@localDirection -->
<!-- $$$quadraticAttenuation-prop$$$quadraticAttenuation$$$setQuadraticAttenuationfloat$$$quadraticAttenuationChangedfloat -->
<h3 class="fn" id="quadraticAttenuation-prop"><a name="quadraticAttenuation-prop"></a><span class="name">quadraticAttenuation</span> : <span class="type">float</span></h3>
<p>Specifies the quadratic attenuation of the spot light</p>
<p><b>Access functions:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> float </td><td class="memItemRight bottomAlign"><span class="name"><b>quadraticAttenuation</b></span>() const</td></tr>
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>setQuadraticAttenuation</b></span>(float <i>value</i>)</td></tr>
</table></div>
<p><b>Notifier signal:</b></p>
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft topAlign rightAlign"> void </td><td class="memItemRight bottomAlign"><span class="name"><b>quadraticAttenuationChanged</b></span>(float <i>quadraticAttenuation</i>)</td></tr>
</table></div>
<!-- @@@quadraticAttenuation -->
</div>
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$QSpotLight[overload1]$$$QSpotLightQt3DCore::QNode* -->
<h3 class="fn" id="QSpotLight"><a name="QSpotLight"></a>QSpotLight::<span class="name">QSpotLight</span>(<span class="type"><a href="qt3dcore-qnode.html">Qt3DCore::QNode</a></span> *<i>parent</i> = nullptr)</h3>
<p>Constructs a new <a href="qt3drender-qspotlight.html">QSpotLight</a> with the specified <i>parent</i>.</p>
<!-- @@@QSpotLight -->
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