QAlphaTest

Qt 5.9.0 Reference Documentation

QAlphaTest Class

(Qt3DRender::QAlphaTest)

The QAlphaTest class specify alpha reference test 更多...

头文件:	#include <QAlphaTest>
qmake:	QT += 3drender
开始支持版本:	Qt 5.7
Instantiated By:	AlphaTest
基类:	Qt3DRender::QRenderState

所有的成员列表, 包括继承的成员

公有类型

enum	AlphaFunction { Never, Always, Less, LessOrEqual, ..., NotEqual }

属性

alphaFunction : AlphaFunction
referenceValue : float

3 个属性继承自 Qt3DCore::QNode
1 个属性继承自 QObject

公有函数

	QAlphaTest(Qt3DCore::QNode *parent = nullptr)
AlphaFunction	alphaFunction() const
float	referenceValue() const

11 个公有函数继承自 Qt3DCore::QNode
32 个公有函数继承自 QObject

公有槽函数

void	setAlphaFunction(AlphaFunction alphaFunction)
void	setReferenceValue(float referenceValue)

3 个公有槽函数继承自 Qt3DCore::QNode
1 个公有槽函数继承自 QObject

信号

void	alphaFunctionChanged(AlphaFunction alphaFunction)
void	referenceValueChanged(float referenceValue)

4 个信号继承自 Qt3DCore::QNode
2 个信号继承自 QObject

其他继承的成员

1 个公有变量继承自 QObject
10 个静态公有成员继承自 QObject
2 个受保护的函数继承自 Qt3DCore::QNode
9 个受保护的函数继承自 QObject
2 个受保护的变量继承自 QObject

详细描述

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.

成员类型

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

属性

alphaFunction : AlphaFunction

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

访问函数:

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.