spotCutoff
The angle in degrees where the spotlight is cut off.
Declaration
var spotCutoff: GLfloat { get set }Discussion
If the w component of the position is not equal to 0.0, the value of the spotCutoff property determines whether the light is a point light or a spotlight. A cutoff value of 180.0 indicates that the light is a point light; for a point light, the spotDirection and spotExponent properties are ignored. Otherwise, the spotCutoff property represents the maximum angle at which the light contributes lighting to the scene. The angle is measured between the vector provided by the spotDirection property and a vector drawn from the light’s position to the point being lit. If the angle exceeds this amount, then the light contributes no light to the scene.
The default value is 180.0.