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 specifiedparent
.
-
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()