QAlphaCoverage Class▲
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Header: QAlphaCoverage
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Since: Qt 5.7
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qmake: QT += 3drender
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Inherited By:
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Instantiated By: qml-qt3d-render-alphacoverage.xml
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Inherits: Qt3DRender::QRenderState
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Group: QAlphaCoverage is part of renderstates
Detailed Description▲
A Qt3DRender::QAlphaCoverage class enables alpha-to-coverage multisampling mode. When enabled, the fragment alpha value is used as a coverage for the sample and combined with fragment coverage value. Qt3DRender::QAlphaCoverage does nothing if multisampling is disabled. Alpha-to-coverage is most useful when order independent blending is required, for example when rendering leaves, grass and other rich vegetation.
It can be added to a QRenderPass by calling QRenderPass::addRenderState():
QRenderPass *renderPass = new QRenderPass();
// Create a alpha coverage render state
QAlphaCoverage *alphaCoverage = new QAlphaCoverage();
QMultiSampleAntiAliasing *multiSampleAntialiasing = new QMultiSampleAntiAliasing();
// Add the render states to the render pass
renderPass->addRenderState(alphaCoverage);
renderPass->addRenderState(multiSampleAntialiasing);Or to a QRenderStateSet by calling QRenderStateSet::addRenderState():
QRenderStateSet *renderStateSet = new QRenderStateSet();
// Create a alpha coverage render state
QAlphaCoverage *alphaCoverage = new QAlphaCoverage();
QMultiSampleAntiAliasing *multiSampleAntialiasing = new QMultiSampleAntiAliasing();
// Add the render states to the render state set
renderStateSet->addRenderState(alphaCoverage);
renderStateSet->addRenderState(multiSampleAntialiasing);See Also▲
See also Qt3DRender::QMultiSampleAntiAliasing
Member Function Documentation▲
[explicit] QAlphaCoverage::QAlphaCoverage(Qt3DCore::QNode *parent = nullptr)▲
The constructor creates a new QAlphaCoverage::QAlphaCoverage instance with the specified parent.