QAlphaTest Class

class Qt3DRender::QAlphaTest

The QAlphaTest class specify alpha reference test. More...

Header: #include <QAlphaTest>
qmake: QT += 3drender
Since: Qt 5.7
Instantiated By: AlphaTest
Inherits: Qt3DRender::QRenderState

This class was introduced in Qt 5.7.

Public Types

enum AlphaFunction { Never, Always, Less, LessOrEqual, Equal, …, NotEqual }

Detailed Description

As the OpenGL documentation explains; The alpha test discards a fragment conditional on the outcome of a comparison between the incoming fragment's alpha value and a constant reference value.

Member Type Documentation

enum QAlphaTest::AlphaFunction

Enumeration for the alpha function values

ConstantValueDescription
Qt3DRender::QAlphaTest::Never0x0200Never pass alpha test
Qt3DRender::QAlphaTest::Always0x0207Always pass alpha test
Qt3DRender::QAlphaTest::Less0x0201Pass alpha test if fragment alpha is less than reference value
Qt3DRender::QAlphaTest::LessOrEqual0x0203Pass alpha test if fragment alpha is less than or equal to reference value
Qt3DRender::QAlphaTest::Equal0x0202Pass alpha test if fragment alpha is equal to reference value
Qt3DRender::QAlphaTest::GreaterOrEqual0x0206Pass alpha test if fragment alpha is greater than or equal to reference value
Qt3DRender::QAlphaTest::Greater0x0204Pass alpha test if fragment alpha is greater than reference value
Qt3DRender::QAlphaTest::NotEqual0x0205Pass alpha test if fragment alpha is not equal to reference value