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 |
- 13 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
- 1 public variable inherited from QObject
- 10 static public members inherited from QObject
- 2 protected functions inherited from Qt3DCore::QNode
- 9 protected functions inherited from QObject
- 2 protected variables 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) |