QAlphaTest Class
class Qt3DRender::QAlphaTestThe QAlphaTest class specify alpha reference test. More...
| Header: | #include <QAlphaTest> |
| CMake: | find_package(Qt6 REQUIRED COMPONENTS 3drender) target_link_libraries(mytarget PRIVATE Qt6::3drender) |
| qmake: | QT += 3drender |
| Instantiated By: | AlphaTest |
| Inherits: | Qt3DRender::QRenderState |
Public Types
| enum | AlphaFunction { Never, Always, Less, LessOrEqual, Equal, …, NotEqual } |
Properties
- alphaFunction : AlphaFunction
- referenceValue : float
Public Functions
| Qt3DRender::QAlphaTest::AlphaFunction | alphaFunction() const |
| float | referenceValue() const |
Public Slots
| void | setAlphaFunction(Qt3DRender::QAlphaTest::AlphaFunction alphaFunction) |
| void | setReferenceValue(float referenceValue) |
Signals
| void | alphaFunctionChanged(Qt3DRender::QAlphaTest::AlphaFunction alphaFunction) |
| void | referenceValueChanged(float referenceValue) |
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
| 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:
| Qt3DRender::QAlphaTest::AlphaFunction | alphaFunction() const |
| void | setAlphaFunction(Qt3DRender::QAlphaTest::AlphaFunction alphaFunction) |
Notifier signal:
| void | alphaFunctionChanged(Qt3DRender::QAlphaTest::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) |
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