UniCone

Format

UniCone // float

The probability of a surface emitting light ray uniformly distributed in a cone. The axis of the cone is the normal vector of the surface. The cone angle is given by ConeAng.

Example

#UniCone, ConeAng
SurfEmit
Shell 1 
1.00000  60.00000

The probability is 100% and the cone angle is 60 degree.

Math

BSDF	PDF
$\frac{1}{2\pi \cos \theta}$	$\frac{1}{2\pi}$