Lamb

出自 DDCC TCAD TOOL Manual
於 2019年9月19日 (四) 11:19 由 CJchen (對話 | 貢獻) 所做的修訂 (Math)

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Format

Lamb // float

The probability of a surface emitting light ray according to Lambertian cosine law. The number of photons emitted in a solid angle d\Omega is proportional to \cos(\theta), where \theta is the angle between the wave vector of a light ray and the normal vector of the emission surface.

Example

#Lamb
SurfEmit
Shell 1 
1.00000

The probability is 100%.

Math

BSDF PDF
\frac{1}{2\pi\cos \theta} row 1 cell 2