lumos.brdf.library.ABG

lumos.brdf.library.ABG(A, B, g)[source]

ABG scattering model. Described here: Using the ABG model

\(BRDF = \frac{A}{B + x^g}\)

Parameters:

  • A (float) – Amplitude parameter, A/B is the specular peak

  • B (float) – Knee parameter, B determines where the BRDF transitions to exponential decay

  • g (float) – Slope parameter, g determines the slope of the BRDF in log-log space

Returns:

BRDF function, where f = BRDF(incident vector, normal_vector, outgoing_vector)

Return type:

function