QPhongAlphaMaterial Class

(Qt3DRender::QPhongAlphaMaterial)

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

Header: #include <QPhongAlphaMaterial>
Since: Qt 5.5
Inherits: Qt3DRender::QMaterial

Properties

Public Functions

QPhongAlphaMaterial(Qt3DCore::QNode *parent = Q_NULLPTR)
~QPhongAlphaMaterial()
float alpha() const
QColor ambient() const
QColor diffuse() const
float shininess() const
QColor specular() const

Public Slots

void setAlpha(float alpha)
void setAmbient(const QColor &ambient)
void setDiffuse(const QColor &diffuse)
void setShininess(float shininess)
void setSpecular(const QColor &specular)

Signals

void alphaChanged(float alpha)
void ambientChanged(const QColor &ambient)
void diffuseChanged(const QColor &diffuse)
void shininessChanged(float shininess)
void specularChanged(const QColor &specular)

Additional Inherited Members

Detailed Description

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

The phong lighting effect is based on the combination of 3 lighting components ambient, diffuse and specular. The relative strengths of these components is 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.

Note: : 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)

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)

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

QPhongAlphaMaterial::QPhongAlphaMaterial(Qt3DCore::QNode *parent = Q_NULLPTR)

Constructs a new QPhongAlphaMaterial instance with parent object parent.

QPhongAlphaMaterial::~QPhongAlphaMaterial()

Destroys the QPhongAlphaMaterial.

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