Qt3DRender.QSpotLight

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

Synopsis

Functions

• def constantAttenuation ()

• def cutOffAngle ()

• def linearAttenuation ()

• def localDirection ()

• def quadraticAttenuation ()

Slots

• def setConstantAttenuation (value)

• def setCutOffAngle (cutOffAngle)

• def setLinearAttenuation (value)

• def setLocalDirection (localDirection)

• def setQuadraticAttenuation (value)

Signals

• def constantAttenuationChanged (constantAttenuation)

• def cutOffAngleChanged (cutOffAngle)

• def linearAttenuationChanged (linearAttenuation)

• def localDirectionChanged (localDirection)

• def quadraticAttenuationChanged (quadraticAttenuation)

Detailed Description

A spotlight is a light source that emits a cone of light in a particular direction.

A spotlight 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.QSpotLight([parent=None])

param parent

QNode

Constructs a new QSpotLight with the specified parent .

PySide2.Qt3DRender.Qt3DRender.QSpotLight.constantAttenuation()

Return type

float

See also

setConstantAttenuation()

PySide2.Qt3DRender.Qt3DRender.QSpotLight.constantAttenuationChanged(constantAttenuation)

Parameters

constantAttenuation – float

PySide2.Qt3DRender.Qt3DRender.QSpotLight.cutOffAngle()

Return type

float

See also

setCutOffAngle()

PySide2.Qt3DRender.Qt3DRender.QSpotLight.cutOffAngleChanged(cutOffAngle)

Parameters

cutOffAngle – float

PySide2.Qt3DRender.Qt3DRender.QSpotLight.linearAttenuation()

Return type

float

See also

setLinearAttenuation()

PySide2.Qt3DRender.Qt3DRender.QSpotLight.linearAttenuationChanged(linearAttenuation)

Parameters

linearAttenuation – float

PySide2.Qt3DRender.Qt3DRender.QSpotLight.localDirection()

Return type

QVector3D

See also

setLocalDirection()

PySide2.Qt3DRender.Qt3DRender.QSpotLight.localDirectionChanged(localDirection)

Parameters

localDirection – QVector3D

PySide2.Qt3DRender.Qt3DRender.QSpotLight.quadraticAttenuation()

Return type

float

See also

setQuadraticAttenuation()

PySide2.Qt3DRender.Qt3DRender.QSpotLight.quadraticAttenuationChanged(quadraticAttenuation)

Parameters

quadraticAttenuation – float

PySide2.Qt3DRender.Qt3DRender.QSpotLight.setConstantAttenuation(value)

Parameters

value – float

See also

constantAttenuation()

PySide2.Qt3DRender.Qt3DRender.QSpotLight.setCutOffAngle(cutOffAngle)

Parameters

cutOffAngle – float

See also

cutOffAngle()

PySide2.Qt3DRender.Qt3DRender.QSpotLight.setLinearAttenuation(value)

Parameters

value – float

See also

linearAttenuation()

PySide2.Qt3DRender.Qt3DRender.QSpotLight.setLocalDirection(localDirection)

Parameters

localDirection – QVector3D

See also

localDirection()

PySide2.Qt3DRender.Qt3DRender.QSpotLight.setQuadraticAttenuation(value)

Parameters

value – float

See also

quadraticAttenuation()