Emitters¶

Angular Area Light (angulararea)¶

This emitter implements an area light source that emits light within a specified angular range.

Here’s an example code for how to setup one:

<emitter type="angulararea">
    <rgb name="radiance" value="18.387, 10.9873, 2.75357"/>
    <float name="cutoff_angle" value="35"/>
    <float name="beam_width" value="20"/>
</emitter>

{
    'type': 'angulararea',
    'cutoff_angle': 35,
    'beam_width': 20,
    'radiance': { 'type': 'rgb', 'value': '18.387, 10.9873, 2.75357' }
}

Parameter	Type	Description
cutoff_angle	float	The angular range (in degrees) over which this object emits light (for every point on its surface). Default: 10.
beam_width	float	The angular range (in degrees) over which the light emitted is maximal. Default: same value as `cutoff_angle`.
radiance	spectrum or texture	Specifies the emitted radiance in units of power per unit area per unit steradian.