QPointLight

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

Synopsis

Functions

• def constantAttenuation ()

• def linearAttenuation ()

• def quadraticAttenuation ()

Slots

• def setConstantAttenuation (value)

• def setLinearAttenuation (value)

• def setQuadraticAttenuation (value)

Signals

• def constantAttenuationChanged (constantAttenuation)

• def linearAttenuationChanged (linearAttenuation)

• def quadraticAttenuationChanged (quadraticAttenuation)

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.

class PySide2.Qt3DRender.Qt3DRender.QPointLight([parent=None])

param parent:

PySide2.Qt3DCore.Qt3DCore.QNode

Constructs a new QPointLight with the specified parent .

PySide2.Qt3DRender.Qt3DRender.QPointLight.constantAttenuation()

Return type:

float

Specifies the constant attenuation of the point light.

Note

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

PySide2.Qt3DRender.Qt3DRender.QPointLight.constantAttenuationChanged(constantAttenuation)

Parameters:

constantAttenuation – float

PySide2.Qt3DRender.Qt3DRender.QPointLight.linearAttenuation()

Return type:

float

Specifies the linear attenuation of the point light.

Note

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

PySide2.Qt3DRender.Qt3DRender.QPointLight.linearAttenuationChanged(linearAttenuation)

Parameters:

linearAttenuation – float

PySide2.Qt3DRender.Qt3DRender.QPointLight.quadraticAttenuation()

Return type:

float

Specifies the quadratic attenuation of the point light.

Note

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

PySide2.Qt3DRender.Qt3DRender.QPointLight.quadraticAttenuationChanged(quadraticAttenuation)

Parameters:

quadraticAttenuation – float

PySide2.Qt3DRender.Qt3DRender.QPointLight.setConstantAttenuation(value)

Parameters:

value – float

Specifies the constant attenuation of the point light.

Note

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

PySide2.Qt3DRender.Qt3DRender.QPointLight.setLinearAttenuation(value)

Parameters:

value – float

Specifies the linear attenuation of the point light.

Note

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

PySide2.Qt3DRender.Qt3DRender.QPointLight.setQuadraticAttenuation(value)

Parameters:

value – float

Specifies the quadratic attenuation of the point light.

Note

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