QAlphaCoverage Class
class Qt3DRender::QAlphaCoverageEnable alpha-to-coverage multisampling mode. More...
Header: | #include <QAlphaCoverage> |
qmake: | QT += 3drender |
Since: | Qt 5.7 |
Instantiated By: | AlphaCoverage |
Inherits: | Qt3DRender::QRenderState |
This class was introduced in Qt 5.7.
Public Functions
QAlphaCoverage(Qt3DCore::QNode *parent = nullptr) |
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 Qt3DRender::QMultiSampleAntiAliasing.
Member Function Documentation
QAlphaCoverage::QAlphaCoverage(Qt3DCore::QNode *parent = nullptr)
The constructor creates a new QAlphaCoverage::QAlphaCoverage instance with the specified parent.