- Qt 6.6
- Qt 3D
- C++ Classes
- Qt3DExtras
- QPhongAlphaMaterial
- Qt 6.6.1 Reference Documentation

# QPhongAlphaMaterial Class

class Qt3DExtras::QPhongAlphaMaterial

The QPhongAlphaMaterial class provides a default implementation of the phong lighting effect with alpha. More...

Header: | #include <QPhongAlphaMaterial>
CMake: | find_package(Qt6 REQUIRED COMPONENTS 3dextras) target_link_libraries(mytarget PRIVATE Qt6::3dextras)
qmake: | QT += 3dextras
Inherits: | Qt3DRender::QMaterial
Status: | Deprecated

This class is deprecated. We strongly advise against using it in new code.

- List of all members, including inherited members

## Properties

alpha : float ambient : QColor blendFunctionArg : Qt3DRender::QBlendEquation::BlendFunction destinationAlphaArg : Qt3DRender::QBlendEquationArguments::Blending destinationRgbArg : Qt3DRender::QBlendEquationArguments::Blending | diffuse : QColor shininess : float sourceAlphaArg : Qt3DRender::QBlendEquationArguments::Blending sourceRgbArg : Qt3DRender::QBlendEquationArguments::Blending specular : QColor

## Public Functions

| QPhongAlphaMaterial(Qt3DCore::QNode *parent = nullptr)
virtual | ~QPhongAlphaMaterial()
float | alpha() const
QColor | ambient() const
Qt3DRender::QBlendEquation::BlendFunction | blendFunctionArg() const
Qt3DRender::QBlendEquationArguments::Blending | destinationAlphaArg() const
Qt3DRender::QBlendEquationArguments::Blending | destinationRgbArg() const
QColor | diffuse() const
float | shininess() const
Qt3DRender::QBlendEquationArguments::Blending | sourceAlphaArg() const
Qt3DRender::QBlendEquationArguments::Blending | sourceRgbArg() const
QColor | specular() const

## Public Slots

void | setAlpha(float alpha)
void | setAmbient(const QColor &ambient)
void | setBlendFunctionArg(Qt3DRender::QBlendEquation::BlendFunction blendFunctionArg)
void | setDestinationAlphaArg(Qt3DRender::QBlendEquationArguments::Blending destinationAlphaArg)
void | setDestinationRgbArg(Qt3DRender::QBlendEquationArguments::Blending destinationRgbArg)
void | setDiffuse(const QColor &diffuse)
void | setShininess(float shininess)
void | setSourceAlphaArg(Qt3DRender::QBlendEquationArguments::Blending sourceAlphaArg)
void | setSourceRgbArg(Qt3DRender::QBlendEquationArguments::Blending sourceRgbArg)
void | setSpecular(const QColor &specular)

## Signals

void | alphaChanged(float alpha)
void | ambientChanged(const QColor &ambient)
void | blendFunctionArgChanged(Qt3DRender::QBlendEquation::BlendFunction blendFunctionArg)
void | destinationAlphaArgChanged(Qt3DRender::QBlendEquationArguments::Blending destinationAlphaArg)
void | destinationRgbArgChanged(Qt3DRender::QBlendEquationArguments::Blending destinationRgbArg)
void | diffuseChanged(const QColor &diffuse)
void | shininessChanged(float shininess)
void | sourceAlphaArgChanged(Qt3DRender::QBlendEquationArguments::Blending sourceAlphaArg)
void | sourceRgbArgChanged(Qt3DRender::QBlendEquationArguments::Blending sourceRgbArg)
void | specularChanged(const QColor &specular)

## Detailed Description

This class is deprecated; use QDiffuseSpecularMaterial instead.

The phong lighting effect is based on the combination of 3 lighting components ambient, diffuse and specular. The relative strengths of these components are controlled by means of their reflectivity coefficients which are modelled as RGB triplets:

- Ambient is the color that is emitted by an object without any other light source.
- Diffuse is the color that is emitted for rought surface reflections with the lights.
- Specular is the color emitted for shiny surface reflections with the lights.
- The shininess of a surface is controlled by a float property.
- Alpha is the transparency of the surface between 0 (fully transparent) and 1 (opaque).

This material uses an effect with a single render pass approach and performs per fragment lighting. Techniques are provided for OpenGL 2, OpenGL 3 or above as well as OpenGL ES 2.

## Property Documentation

### alpha : float

Holds the alpha component of the object which varies between 0 and 1.

The default value is 0.5f.

Access functions:

float | alpha() const
void | setAlpha(float alpha)

Notifier signal:

void | alphaChanged(float alpha)

### ambient : QColor

Holds the ambient color.

Access functions:

QColor | ambient() const
void | setAmbient(const QColor &ambient)

Notifier signal:

void | ambientChanged(const QColor &ambient)

### blendFunctionArg : Qt3DRender::QBlendEquation::BlendFunction

Holds the blend equation function argument.

Access functions:

Qt3DRender::QBlendEquation::BlendFunction | blendFunctionArg() const
void | setBlendFunctionArg(Qt3DRender::QBlendEquation::BlendFunction blendFunctionArg)

Notifier signal:

void | blendFunctionArgChanged(Qt3DRender::QBlendEquation::BlendFunction blendFunctionArg)

See also Qt3DRender::QBlendEquation::BlendFunction.

### destinationAlphaArg : Qt3DRender::QBlendEquationArguments::Blending

Holds the blend equation destination alpha blending argument.

Access functions:

Qt3DRender::QBlendEquationArguments::Blending | destinationAlphaArg() const
void | setDestinationAlphaArg(Qt3DRender::QBlendEquationArguments::Blending destinationAlphaArg)

Notifier signal:

void | destinationAlphaArgChanged(Qt3DRender::QBlendEquationArguments::Blending destinationAlphaArg)

See also Qt3DRender::QBlendEquationArguments::Blending.

### destinationRgbArg : Qt3DRender::QBlendEquationArguments::Blending

Holds the blend equation destination RGB blending argument.

Access functions:

Qt3DRender::QBlendEquationArguments::Blending | destinationRgbArg() const
void | setDestinationRgbArg(Qt3DRender::QBlendEquationArguments::Blending destinationRgbArg)

Notifier signal:

void | destinationRgbArgChanged(Qt3DRender::QBlendEquationArguments::Blending destinationRgbArg)

See also Qt3DRender::QBlendEquationArguments::Blending.

### diffuse : QColor

Holds the diffuse color.

Access functions:

QColor | diffuse() const
void | setDiffuse(const QColor &diffuse)

Notifier signal:

void | diffuseChanged(const QColor &diffuse)

### shininess : float

Holds the shininess exponent.

Access functions:

float | shininess() const
void | setShininess(float shininess)

Notifier signal:

void | shininessChanged(float shininess)

### sourceAlphaArg : Qt3DRender::QBlendEquationArguments::Blending

Holds the blend equation source alpha blending argument.

Access functions:

Qt3DRender::QBlendEquationArguments::Blending | sourceAlphaArg() const
void | setSourceAlphaArg(Qt3DRender::QBlendEquationArguments::Blending sourceAlphaArg)

Notifier signal:

void | sourceAlphaArgChanged(Qt3DRender::QBlendEquationArguments::Blending sourceAlphaArg)

See also Qt3DRender::QBlendEquationArguments::Blending.

### sourceRgbArg : Qt3DRender::QBlendEquationArguments::Blending

Holds the blend equation source RGB blending argument.

Access functions:

Qt3DRender::QBlendEquationArguments::Blending | sourceRgbArg() const
void | setSourceRgbArg(Qt3DRender::QBlendEquationArguments::Blending sourceRgbArg)

Notifier signal:

void | sourceRgbArgChanged(Qt3DRender::QBlendEquationArguments::Blending sourceRgbArg)

See also Qt3DRender::QBlendEquationArguments::Blending.

### specular : QColor

Holds the specular color.

Access functions:

QColor | specular() const
void | setSpecular(const QColor &specular)

Notifier signal:

void | specularChanged(const QColor &specular)

## Member Function Documentation

### `[explicit]` QPhongAlphaMaterial::QPhongAlphaMaterial(Qt3DCore::QNode *parent = nullptr)

Constructs a new QPhongAlphaMaterial instance with parent object parent.

### `[virtual noexcept]` QPhongAlphaMaterial::~QPhongAlphaMaterial()

Destroys the QPhongAlphaMaterial.