Trait pbrt::core::reflection::Bxdf

pub trait Bxdf {
    fn f(&self, wo: &Vector3f, wi: &Vector3f) -> Spectrum;
    fn get_type(&self) -> u8;

    fn matches_flags(&self, t: u8) -> bool { ... }
    fn sample_f(
        &self, 
        wo: &Vector3f, 
        wi: &mut Vector3f, 
        u: &Point2f, 
        pdf: &mut Float, 
        _sampled_type: &mut u8
    ) -> Spectrum { ... }
    fn pdf(&self, wo: &Vector3f, wi: &Vector3f) -> Float { ... }
}

Required Methods

fn f(&self, wo: &Vector3f, wi: &Vector3f) -> Spectrum

fn get_type(&self) -> u8

Provided Methods

fn matches_flags(&self, t: u8) -> bool

fn sample_f(
    &self,
    wo: &Vector3f,
    wi: &mut Vector3f,
    u: &Point2f,
    pdf: &mut Float,
    _sampled_type: &mut u8
) -> Spectrum

Sample the BxDF for the given outgoing direction, using the given pair of uniform samples.

The default implementation uses importance sampling by using a cosine-weighted distribution.

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

Evaluate the PDF for the given outgoing and incoming directions.

Note: this method needs to be consistent with Bxdf::sample_f().

Implementors

impl Bxdf for FourierBSDF

fn f(&self, wo: &Vector3f, wi: &Vector3f) -> Spectrum

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     sample: &Point2f,     pdf: &mut Float,     _sampled_type: &mut u8 ) -> Spectrum

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

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool

impl Bxdf for FresnelBlend

fn f(&self, wo: &Vector3f, wi: &Vector3f) -> Spectrum

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     sample: &Point2f,     pdf: &mut Float,     _sampled_type: &mut u8 ) -> Spectrum

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

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool

impl Bxdf for FresnelSpecular

fn f(&self, _wo: &Vector3f, _wi: &Vector3f) -> Spectrum

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     sample: &Point2f,     pdf: &mut Float,     sampled_type: &mut u8 ) -> Spectrum

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

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool

impl Bxdf for LambertianReflection

fn f(&self, _wo: &Vector3f, _wi: &Vector3f) -> Spectrum

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     u: &Point2f,     pdf: &mut Float,     _sampled_type: &mut u8 ) -> Spectrum

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

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool

impl Bxdf for LambertianTransmission

fn f(&self, _wo: &Vector3f, _wi: &Vector3f) -> Spectrum

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     u: &Point2f,     pdf: &mut Float,     _sampled_type: &mut u8 ) -> Spectrum

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

impl Bxdf for MicrofacetReflection

fn f(&self, wo: &Vector3f, wi: &Vector3f) -> Spectrum

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     u: &Point2f,     pdf: &mut Float,     _sampled_type: &mut u8 ) -> Spectrum

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

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool

impl Bxdf for MicrofacetTransmission

fn f(&self, wo: &Vector3f, wi: &Vector3f) -> Spectrum

fn get_type(&self) -> u8

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     u: &Point2f,     pdf: &mut Float,     _sampled_type: &mut u8 ) -> Spectrum

Override sample_f() to use a better importance sampling method than weighted cosine based on the microface distribution

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

fn matches_flags(&self, t: u8) -> bool

impl Bxdf for OrenNayar

fn f(&self, wo: &Vector3f, wi: &Vector3f) -> Spectrum

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     u: &Point2f,     pdf: &mut Float,     _sampled_type: &mut u8 ) -> Spectrum

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

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool

impl Bxdf for ScaledBxDF

fn f(&self, wo: &Vector3f, wi: &Vector3f) -> Spectrum

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     sample: &Point2f,     pdf: &mut Float,     sampled_type: &mut u8 ) -> Spectrum

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

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool

impl Bxdf for SpecularReflection

fn f(&self, _wo: &Vector3f, _wi: &Vector3f) -> Spectrum

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     _sample: &Point2f,     pdf: &mut Float,     _sampled_type: &mut u8 ) -> Spectrum

fn pdf(&self, _wo: &Vector3f, _wi: &Vector3f) -> Float

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool

impl Bxdf for SpecularTransmission

fn f(&self, _wo: &Vector3f, _wi: &Vector3f) -> Spectrum

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     _sample: &Point2f,     pdf: &mut Float,     _sampled_type: &mut u8 ) -> Spectrum

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

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool

impl Bxdf for HairBSDF

fn f(&self, wo: &Vector3f, wi: &Vector3f) -> Spectrum

fn sample_f(     &self,     wo: &Vector3f,     wi: &mut Vector3f,     sample: &Point2f,     pdf: &mut Float,     _sampled_type: &mut u8 ) -> Spectrum

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

fn get_type(&self) -> u8

fn matches_flags(&self, t: u8) -> bool