surface

Definition of surface scattering functions (BRDF).

Classes

CosineLobe([i])	Cosine-lobe of power i.
HG_nadirnorm([t])	Nadir-normalized HenyeyGreenstein scattering function.
HenyeyGreenstein([t])	HenyeyGreenstein scattering function.
Isotropic(**kwargs)	Isotropic (Lambertian) surface brdf.
LinComb([choices])	Class to generate linear-combinations of scattering distribution functions.
SurfaceScatter([ncoefs, a])	Abstract base class for use as surface scattering distribution.