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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 >QNoDraw</td></tr></table><table class="buildversion"><tr>
<td id="buildversion" width="100%" align="right"><a href="qt3d-index.html">Qt 5.12.2 Reference Documentation</a></td>
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<h3><a name="toc">Contents</a></h3>
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<li class="level1"><a href="#public-functions">Public Functions</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">QNoDraw Class</h1>
<span class="small-subtitle">(<a href="qt3drender-qnodraw.html">Qt3DRender::QNoDraw</a>)<br/></span>
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<p>When a <a href="qt3drender-qnodraw.html">Qt3DRender::QNoDraw</a> node is present in a FrameGraph branch, this prevents the renderer from rendering any primitive. <a href="#details">More...</a></p>
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<tr><td class="memItemLeft rightAlign topAlign"> Header:</td><td class="memItemRight bottomAlign"> <span class="preprocessor">#include <QNoDraw></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-nodraw.html">NoDraw</a></td></tr><tr><td class="memItemLeft rightAlign topAlign"> Inherits:</td><td class="memItemRight bottomAlign"> <a href="qt3drender-qframegraphnode.html">Qt3DRender::QFrameGraphNode</a></td></tr></table></div><ul>
<li><a href="qt3drender-qnodraw-members.html">List of all members, including inherited members</a></li>
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<a name="public-functions"></a>
<h2 id="public-functions">Public Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qnodraw.html#QNoDraw">QNoDraw</a></b>(Qt3DCore::QNode *<i>parent</i> = nullptr)</td></tr>
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<li class="fn">1 public function inherited from <a href="qt3drender-qframegraphnode.html#public-functions">Qt3DRender::QFrameGraphNode</a></li>
<li class="fn">13 public functions inherited from <a href="qt3dcore-qnode.html#public-functions">Qt3DCore::QNode</a></li>
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<h2 id="static-public-members">Static Public Members</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> const QMetaObject </td><td class="memItemRight bottomAlign"><b><a href="qt3drender-qnodraw.html#staticMetaObject-var">staticMetaObject</a></b></td></tr>
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<h3>Additional Inherited Members</h3>
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<li class="fn">3 properties inherited from <a href="qt3dcore-qnode.html#properties">Qt3DCore::QNode</a></li>
<li class="fn">3 public slots inherited from <a href="qt3dcore-qnode.html#public-slots">Qt3DCore::QNode</a></li>
<li class="fn">4 signals inherited from <a href="qt3dcore-qnode.html#signals">Qt3DCore::QNode</a></li>
<li class="fn">1 protected function inherited from <a href="qt3drender-qframegraphnode.html#protected-functions">Qt3DRender::QFrameGraphNode</a></li>
<li class="fn">2 protected functions inherited from <a href="qt3dcore-qnode.html#protected-functions">Qt3DCore::QNode</a></li>
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<a name="details"></a>
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<div class="descr">
<h2 id="details">Detailed Description</h2>
<p>When a <a href="qt3drender-qnodraw.html">Qt3DRender::QNoDraw</a> node is present in a FrameGraph branch, this prevents the renderer from rendering any primitive.</p>
<p><a href="qt3drender-qnodraw.html">Qt3DRender::QNoDraw</a> should be used when the FrameGraph needs to set up some render states or clear some buffers without requiring any mesh to be drawn. It has the same effect as having a <a href="qt3drender-qrenderpassfilter.html">Qt3DRender::QRenderPassFilter</a> that matches none of available <a href="qt3drender-qrenderpass.html">Qt3DRender::QRenderPass</a> instances of the scene without the overhead cost of actually performing the filtering.</p>
<p>When disabled, a <a href="qt3drender-qnodraw.html">Qt3DRender::QNoDraw</a> node won't prevent the scene from being rendered. Toggling the enabled property is therefore a way to make a <a href="qt3drender-qnodraw.html">Qt3DRender::QNoDraw</a> active or inactive.</p>
<p><a href="qt3drender-qnodraw.html">Qt3DRender::QNoDraw</a> is usually used as a child of a Qt3DRendeR::QClearBuffers node to prevent from drawing the scene when there are multiple render passes.</p>
<pre class="cpp">
<span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qviewport.html">QViewport</a></span> <span class="operator">*</span>viewport <span class="operator">=</span> <span class="keyword">new</span> <span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qviewport.html">QViewport</a></span>();
<span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qcameraselector.html">QCameraSelector</a></span> <span class="operator">*</span>cameraSelector <span class="operator">=</span> <span class="keyword">new</span> <span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qcameraselector.html">QCameraSelector</a></span>(viewport);
<span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qclearbuffers.html">QClearBuffers</a></span> <span class="operator">*</span>clearBuffers <span class="operator">=</span> <span class="keyword">new</span> <span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qclearbuffers.html">QClearBuffers</a></span>(cameraSelector);
clearBuffers<span class="operator">-</span><span class="operator">></span>setBuffers(<span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qclearbuffers.html">QClearBuffers</a></span><span class="operator">::</span>ColorDepthBuffer);
<span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qnodraw.html#QNoDraw">QNoDraw</a></span> <span class="operator">*</span>noDraw <span class="operator">=</span> <span class="keyword">new</span> <span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qnodraw.html#QNoDraw">QNoDraw</a></span>(clearBuffers);
<span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qrenderpassfilter.html">QRenderPassFilter</a></span> <span class="operator">*</span>mainPass <span class="operator">=</span> <span class="keyword">new</span> <span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qrenderpassfilter.html">QRenderPassFilter</a></span>(cameraSelector);
<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
<span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qrenderpassfilter.html">QRenderPassFilter</a></span> <span class="operator">*</span>previewPass <span class="operator">=</span> <span class="keyword">new</span> <span class="type">Qt3DRender</span><span class="operator">::</span><span class="type"><a href="qt3drender-qrenderpassfilter.html">QRenderPassFilter</a></span>(cameraSelector);
<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
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<h2>Member Function Documentation</h2>
<!-- $$$QNoDraw[overload1]$$$QNoDrawQt3DCore::QNode* -->
<h3 class="fn" id="QNoDraw"><a name="QNoDraw"></a>QNoDraw::<span class="name">QNoDraw</span>(<span class="type"><a href="qt3dcore-qnode.html">Qt3DCore::QNode</a></span> *<i>parent</i> = nullptr)</h3>
<p>The constructor creates an instance with the specified <i>parent</i>.</p>
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