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 |
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) | |
AlphaFunction | alphaFunction() const |
float | referenceValue() const |
- 11 public functions inherited from Qt3DCore::QNode
- 32 public functions inherited from QObject
Public Slots
void | setAlphaFunction(AlphaFunction alphaFunction) |
void | setReferenceValue(float referenceValue) |
- 3 public slots inherited from Qt3DCore::QNode
- 1 public slot inherited from QObject
Signals
void | alphaFunctionChanged(AlphaFunction alphaFunction) |
void | referenceValueChanged(float referenceValue) |
- 4 signals inherited from Qt3DCore::QNode
- 2 signals inherited from QObject
Additional Inherited Members
- 11 static public members inherited from QObject
- 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 |
Property Documentation
alphaFunction : AlphaFunction
Holds the alpha function used by the alpha test. Default is Never.
Access functions:
AlphaFunction | alphaFunction() const |
void | setAlphaFunction(AlphaFunction alphaFunction) |
Notifier signal:
void | alphaFunctionChanged(AlphaFunction alphaFunction) |
referenceValue : float
Holds the reference value used by the alpha test. Default is 0.0. When set, the value is clamped between 0 and 1.
Access functions:
float | referenceValue() const |
void | setReferenceValue(float referenceValue) |
Notifier signal:
void | referenceValueChanged(float referenceValue) |
Member Function Documentation
QAlphaTest::QAlphaTest(Qt3DCore::QNode *parent = nullptr)
Default constructs an instance of QAlphaTest.
© The Qt Company Ltd
Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-5.9/qt3drender-qalphatest.html