QAlphaTest¶

The QAlphaTest class specify alpha reference test. More…

Synopsis¶

Functions¶

def alphaFunction ()
def referenceValue ()

Slots¶

def setAlphaFunction (alphaFunction)
def setReferenceValue (referenceValue)

Signals¶

def alphaFunctionChanged (alphaFunction)
def referenceValueChanged (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.

class PySide2.Qt3DRender.Qt3DRender.QAlphaTest([parent=None])¶

Parameters:: parent – PySide2.Qt3DCore.Qt3DCore.QNode

PySide2.Qt3DRender.Qt3DRender.QAlphaTest.AlphaFunction¶

Enumeration for the alpha function values

Constant	Description
Qt3DRender.QAlphaTest.Never	Never pass alpha test
Qt3DRender.QAlphaTest.Always	Always pass alpha test
Qt3DRender.QAlphaTest.Less	Pass alpha test if fragment alpha is less than reference value
Qt3DRender.QAlphaTest.LessOrEqual	Pass alpha test if fragment alpha is less than or equal to reference value
Qt3DRender.QAlphaTest.Equal	Pass alpha test if fragment alpha is equal to reference value
Qt3DRender.QAlphaTest.GreaterOrEqual	Pass alpha test if fragment alpha is greater than or equal to reference value
Qt3DRender.QAlphaTest.Greater	Pass alpha test if fragment alpha is greater than reference value
Qt3DRender.QAlphaTest.NotEqual	Pass alpha test if fragment alpha is not equal to reference value

PySide2.Qt3DRender.Qt3DRender.QAlphaTest.alphaFunction()¶

Return type:: AlphaFunction

Holds the alpha function used by the alpha test. Default is Never.

PySide2.Qt3DRender.Qt3DRender.QAlphaTest.alphaFunctionChanged(alphaFunction)¶

Parameters:: alphaFunction – AlphaFunction

PySide2.Qt3DRender.Qt3DRender.QAlphaTest.referenceValue()¶

Return type:: float

Holds the reference value used by the alpha test. Default is 0.0. When set, the value is clamped between 0 and 1.

PySide2.Qt3DRender.Qt3DRender.QAlphaTest.referenceValueChanged(referenceValue)¶

Parameters:: referenceValue – float

PySide2.Qt3DRender.Qt3DRender.QAlphaTest.setAlphaFunction(alphaFunction)¶

Parameters:: alphaFunction – AlphaFunction

Holds the alpha function used by the alpha test. Default is Never.

PySide2.Qt3DRender.Qt3DRender.QAlphaTest.setReferenceValue(referenceValue)¶

Parameters:: referenceValue – float