Struct arendur::bxdf::oren_nayar::OrenNayer

pub struct OrenNayer { /* fields omitted */ }

An Oren-Nayer brdf as per https://en.wikipedia.org/wiki/Oren%E2%80%93Nayar_reflectance_model

Methods

impl OrenNayer

fn new(reflectance: RGBSpectrumf, sigma: Float) -> OrenNayer

construction, sigma in radians

Trait Implementations

impl Copy for OrenNayer

impl Clone for OrenNayer

fn clone(&self) -> OrenNayer

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OrenNayer

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Bxdf for OrenNayer

fn kind(&self) -> BxdfType

returns the type of the bxdf

fn evaluate(&self, wo: Vector3f, wi: Vector3f) -> RGBSpectrumf

evaluate the function given two normalized directions

fn is(&self, t: BxdfType) -> bool

check if the type matches

fn evaluate_sampled(
    &self,
    wo: Vector3f,
    u: Point2f
) -> (RGBSpectrumf, Vector3f, Float, BxdfType)

Given an outgoing direction wo, and a uniform sample u from $[0,1)^2$, sample an incoming direction wi, and returns it with function value evaluated as f(wo, wi), as well as the pdf associated with the incoming direction, as well as the type of the scattering event.

fn evaluate_importance(&self, wo: Vector3f, wi: Vector3f) -> RGBSpectrumf

evaluate the function given two normalized directions, the particle being traced is camera-ray importance, rather than light radiance.

fn evaluate_importance_sampled(
    &self,
    wo: Vector3f,
    u: Point2f
) -> (RGBSpectrumf, Vector3f, Float, BxdfType)

Given an outgoing direction wo, and a uniform sample u from $[0,1)^2$, sample an incoming direction wi, and returns it with function value evaluated as f(wo, wi), as well as the pdf associated with the incoming direction， as well as the type of the scattering event. The particles being traced is camera-ray importance, rather tan light radiance

fn pdf(&self, wo: Vector3f, wi: Vector3f) -> Float

evalute pdf given the incoming and outgoing direction

fn rho_hd(&self, wo: Vector3f, samples: &[Point2f]) -> RGBSpectrumf

hemispherical-directional reflectance

fn rho_hh(&self, samples0: &[Point2f], samples1: &[Point2f]) -> RGBSpectrumf

hemispherical-hemispherical reflactance