phonglobe

bsdf  phonglobe(vector dir, float exponent, ...)

bsdf  phonglobe(vector nml, vector dir, float exponent, ...)

bsdf  phonglobe(vector dir, float exponentx, float exponenty, vector framex, vector framey, ...)

bsdf  phonglobe(vector nml, vector dir, float exponentx, float exponenty, vector framex, vector framey, ...)

A phong (blurred) reflection along a given direction vector. This will produce the same result as phong() when the direction vector is the reflection vector, but with this function you can also gather illumination from other directions (such as transmission).

It is possible to create anisotropic phong lobes by providing x and y exponents and tangent vectors.

dir

the direction of specularity.

nml

optional normal to specify the hemisphere for reflection directions.

exponent

phong exponent.

exponentx

phong exponent along the framex vector.

exponenty

phong exponent along the framey vector.

framex

highlight X direction

framey

highlight Y direction