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Add dielectric pbrt material

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This commit is contained in:
hal8174 2025-08-28 00:22:58 +02:00
parent 0480e041cd
commit 2269bd102d
Signed by: hal8174
SSH key fingerprint: SHA256:NN98ZYwnrreQLSOV/g+amY7C3yL/mS1heD7bi5t6PPw
5 changed files with 43 additions and 27 deletions
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16
ray-tracing-material/src/microfacet.rs
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@ -1,5 +1,5 @@
use rand_distr::{Distribution, Normal};
use ray_tracing_core::{material::Material, prelude::*};
use ray_tracing_core::{material::Material, math::material::fresnel_real, prelude::*};
use std::fmt::Debug;
#[derive(Debug)]
@ -14,20 +14,6 @@ impl<D: MicrofacetDistribution + Debug> Microfacet<D> {
}
}
pub fn fresnel_real(cos_theta_in: Float, nu1: Float, nu2: Float) -> Float {
let nu_rel = nu1 / nu2;
let cos_theta_tr = Float::sqrt(1.0 - nu_rel * nu_rel * (1.0 - cos_theta_in * cos_theta_in));
let rs = ((nu1 * cos_theta_in - nu2 * cos_theta_tr)
/ (nu1 * cos_theta_in + nu2 * cos_theta_tr))
.powi(2);
let rp = ((nu1 * cos_theta_tr - nu2 * cos_theta_in)
/ (nu1 * cos_theta_tr + nu2 * cos_theta_in))
.powi(2);
0.5 * (rs + rp)
}
impl<R: Rng, D: MicrofacetDistribution + Debug + Sync + Send> Material<R> for Microfacet<D> {
fn eval(&self, w_in: Dir3, w_out: Dir3, _rng: &mut R) -> ray_tracing_core::prelude::Color {
if w_out.y() > 0.0 && w_in.y() > 0.0 {