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Diffstat (limited to 'src/render/lights/qpointlight.cpp')
| -rw-r--r-- | src/render/lights/qpointlight.cpp | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/render/lights/qpointlight.cpp b/src/render/lights/qpointlight.cpp index 28dd265b8..2b042c91d 100644 --- a/src/render/lights/qpointlight.cpp +++ b/src/render/lights/qpointlight.cpp @@ -75,6 +75,19 @@ QPointLightPrivate::QPointLightPrivate() \since 5.5 \brief Encapsulate a Point Light object in a Qt 3D scene. + 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: + + \code + totalAttenuation = 1.0 / (constantAttenuation + (linearAttenuation * distance) + (quadraticAttenuation * distance * distance)); + \endcode + + Custom materials may choose to interpret these factors differently. */ /*! @@ -84,6 +97,20 @@ QPointLightPrivate::QPointLightPrivate() \inqmlmodule Qt3D.Render \since 5.5 \brief Encapsulate a Point Light object in a Qt 3D scene. + + 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: + + \code + totalAttenuation = 1.0 / (constantAttenuation + (linearAttenuation * distance) + (quadraticAttenuation * distance * distance)); + \endcode + + Custom materials may choose to interpret these factors differently. */ /*! |