class QPointLight¶

Encapsulate a Point Light object in a Qt 3D scene. More…

Synopsis¶

Properties¶

constantAttenuationᅟ
linearAttenuationᅟ
quadraticAttenuationᅟ

Methods¶

def __init__()
def constantAttenuation()
def linearAttenuation()
def quadraticAttenuation()

Slots¶

def setConstantAttenuation()
def setLinearAttenuation()
def setQuadraticAttenuation()

Note

This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE

Detailed Description¶

A point light is a light source that emits light in all directions, from a single point. Conceptually, this is similar to light given off by a standard light bulb.

A point light uses three attenuation factors to describe how the intensity of the light decreases over distance. These factors are designed to be used together in calcuating total attenuation. For the materials in Qt3D Extras the following formula is used, where distance is the distance from the light to the surface being rendered:

totalAttenuation = 1.0 / (constantAttenuation + (linearAttenuation * distance) + (quadraticAttenuation * distance * distance));

Custom materials may choose to interpret these factors differently.

Note

Properties can be used directly when from __feature__ import true_property is used or via accessor functions otherwise.

property constantAttenuationᅟ: float¶

Specifies the constant attenuation of the point light.

Note

The exact meaning and use of this property is up to the material implementation.

Access functions:

constantAttenuation()
setConstantAttenuation()
Signal constantAttenuationChanged()

property linearAttenuationᅟ: float¶

Specifies the linear attenuation of the point light.

Note

The exact meaning and use of this property is up to the material implementation.

Access functions:

linearAttenuation()
setLinearAttenuation()
Signal linearAttenuationChanged()

property quadraticAttenuationᅟ: float¶

Specifies the quadratic attenuation of the point light.

Note

The exact meaning and use of this property is up to the material implementation.

Access functions:

quadraticAttenuation()
setQuadraticAttenuation()
Signal quadraticAttenuationChanged()

__init__([parent=None])¶

Parameters:: parent – QNode

Constructs a new QPointLight with the specified parent.

constantAttenuation()¶

Return type:: float

See also

setConstantAttenuation()

Getter of property constantAttenuationᅟ .

constantAttenuationChanged(constantAttenuation)¶

Parameters:: constantAttenuation – float

Notification signal of property constantAttenuationᅟ .

linearAttenuation()¶

Return type:: float

See also

setLinearAttenuation()

Getter of property linearAttenuationᅟ .

linearAttenuationChanged(linearAttenuation)¶

Parameters:: linearAttenuation – float

Notification signal of property linearAttenuationᅟ .

quadraticAttenuation()¶

Return type:: float

See also

setQuadraticAttenuation()

Getter of property quadraticAttenuationᅟ .

quadraticAttenuationChanged(quadraticAttenuation)¶

Parameters:: quadraticAttenuation – float

Notification signal of property quadraticAttenuationᅟ .

setConstantAttenuation(value)¶

Parameters:: value – float

See also

constantAttenuation()

Setter of property constantAttenuationᅟ .

setLinearAttenuation(value)¶

Parameters:: value – float

See also

linearAttenuation()

Setter of property linearAttenuationᅟ .

setQuadraticAttenuation(value)¶

Parameters:: value – float

See also

quadraticAttenuation()

Setter of property quadraticAttenuationᅟ .