The QAlphaTest class specify alpha reference test. More...
Header: | #include <QAlphaTest> |
CMake: | find_package(Qt6 COMPONENTS 3drender REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::3drender) |
qmake: | QT += 3drender |
Since: | Qt 5.7 |
Instantiated By: | AlphaTest |
Inherits: | Qt3DRender::QRenderState |
enum | AlphaFunction { Never, Always, Less, LessOrEqual, Equal, …, NotEqual } |
Qt3DRender::QAlphaTest::AlphaFunction | alphaFunction() const |
float | referenceValue() const |
void | setAlphaFunction(Qt3DRender::QAlphaTest::AlphaFunction alphaFunction) |
void | setReferenceValue(float referenceValue) |
void | alphaFunctionChanged(Qt3DRender::QAlphaTest::AlphaFunction alphaFunction) |
void | referenceValueChanged(float referenceValue) |
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.
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 |
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) |
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) |
© The Qt Company Ltd
Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-6.2/qt3drender-qalphatest.html