Struct tray_rust::bxdf::microfacet::beckmann::Beckmann

pub struct Beckmann { /* fields omitted */ }

Beckmann microfacet distribution with Smith shadowing-masking. This is the microfacet model described by Walter et al.

Methods

impl Beckmann

pub fn new(w: f32) -> Beckmann

Create a new Beckmann distribution with the desired width

Trait Implementations

impl MicrofacetDistribution for Beckmann

fn normal_distribution(&self, w_h: &Vector) -> f32

Compute the probability that microfacets are oriented with normal w_h in this distribution

fn sample(&self, _: &Vector, samples: &(f32, f32)) -> Vector

Sample the distribution for some outgoing light direction w_o. returns the sampled microfacet normal

fn pdf(&self, w_h: &Vector) -> f32

Compute the probability of sampling a certain microfacet normal from the distribution, w_h

fn shadowing_masking(&self, w_i: &Vector, w_o: &Vector, w_h: &Vector) -> f32

Compute the shadowing masking function for the incident and outgoing directions w_i and w_o for microfacets with normal w_h. Returns what fraction of the microfacets with the normal are visible in both directions.

fn monodir_shadowing(&self, v: &Vector, w_h: &Vector) -> f32

Monodirectional shadowing function from Walter et al., we use the Smith shadowing-masking which uses the reciprocity of this function. w is the incident/outgoing light direction and w_h is the microfacet normal

impl Clone for Beckmann

fn clone(&self) -> Beckmann

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Beckmann