QAlphaTest 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

• List of all members, including inherited members
• Obsolete members

Public Types

enum	AlphaFunction { Never, Always, Less, LessOrEqual, ..., NotEqual }

Properties

• alphaFunction : AlphaFunction
• referenceValue : float

• 3 properties inherited from Qt3DCore::QNode
• 1 property inherited from QObject

Public Functions

	QAlphaTest(Qt3DCore::QNode *parent = nullptr)
Qt3DRender::QAlphaTest::AlphaFunction	alphaFunction() const
float	referenceValue() const

• 13 public functions inherited from Qt3DCore::QNode
• 31 public functions inherited from QObject

Public Slots

void	setAlphaFunction(Qt3DRender::QAlphaTest::AlphaFunction alphaFunction)
void	setReferenceValue(float referenceValue)

• 3 public slots inherited from Qt3DCore::QNode
• 1 public slot inherited from QObject

Signals

void	alphaFunctionChanged(Qt3DRender::QAlphaTest::AlphaFunction alphaFunction)
void	referenceValueChanged(float referenceValue)

• 4 signals inherited from Qt3DCore::QNode
• 2 signals inherited from QObject

Static Public Members

const QMetaObject

staticMetaObject

• 9 static public members inherited from QObject

Additional Inherited Members

• 2 protected functions inherited from Qt3DCore::QNode
• 9 protected functions inherited from QObject

Detailed Description

The QAlphaTest class specify alpha reference test.

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

Constant	Value	Description
Qt3DRender::QAlphaTest::Never	0x0200	Never pass alpha test
Qt3DRender::QAlphaTest::Always	0x0207	Always pass alpha test
Qt3DRender::QAlphaTest::Less	0x0201	Pass alpha test if fragment alpha is less than reference value
Qt3DRender::QAlphaTest::LessOrEqual	0x0203	Pass alpha test if fragment alpha is less than or equal to reference value
Qt3DRender::QAlphaTest::Equal	0x0202	Pass alpha test if fragment alpha is equal to reference value
Qt3DRender::QAlphaTest::GreaterOrEqual	0x0206	Pass alpha test if fragment alpha is greater than or equal to reference value
Qt3DRender::QAlphaTest::Greater	0x0204	Pass alpha test if fragment alpha is greater than reference value
Qt3DRender::QAlphaTest::NotEqual	0x0205	Pass alpha test if fragment alpha is not equal to reference value

Member Function Documentation

QAlphaTest::QAlphaTest(Qt3DCore::QNode *parent = nullptr)

Default constructs an instance of QAlphaTest.