Enable alpha-to-coverage multisampling mode. 更多...
| 头： | #include <QAlphaCoverage> |
| qmake: | QT += 3drender |
| Since: | Qt 5.7 |
| 实例化： | AlphaCoverage |
| 继承： | Qt3DRender::QRenderState |
该类在 Qt 5.7 引入。
| QAlphaCoverage (Qt3DCore::QNode * parent = nullptr) |
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 通过调用 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 通过调用 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);
另请参阅 Qt3DRender::QMultiSampleAntiAliasing .
The constructor creates a new QAlphaCoverage::QAlphaCoverage instance with the specified parent .
