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 PySide6.Qt3DRender.Qt3DRender.QPointLight([parent=None])¶
- Parameters
parent –
PySide6.Qt3DCore.Qt3DCore.QNode
Constructs a new QPointLight
with the specified parent
.
- PySide6.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.
- PySide6.Qt3DRender.Qt3DRender.QPointLight.constantAttenuationChanged(constantAttenuation)¶
- Parameters
constantAttenuation – float
- PySide6.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.
- PySide6.Qt3DRender.Qt3DRender.QPointLight.linearAttenuationChanged(linearAttenuation)¶
- Parameters
linearAttenuation – float
- PySide6.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.
- PySide6.Qt3DRender.Qt3DRender.QPointLight.quadraticAttenuationChanged(quadraticAttenuation)¶
- Parameters
quadraticAttenuation – float
- PySide6.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.
- PySide6.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.
- PySide6.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.
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