SpotLight QML Type

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

• List of all members, including inherited members

Properties

• constantAttenuation : float
• cutOffAngle : float
• linearAttenuation : float
• localDirection : vector3d
• quadraticAttenuation : float

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.

Property Documentation