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Add eval to visualizer and fix pbr error

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This commit is contained in:
hal8174 2024-12-26 00:57:57 +01:00
parent 109a72c19a
commit 3a37a72f56
10 changed files with 105 additions and 55 deletions
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2
ray-tracing-core/src/material.rs
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@ -8,7 +8,7 @@ pub trait Material<R: Rng>: Sync + Debug {
fn sample(&self, w_in: Dir3, rng: &mut R) -> SampleResult {
let w_out = Dir3::sample_cosine_hemisphere(rng);
SampleResult::new(w_out, self.eval(w_in, w_out, rng))
SampleResult::new(w_out, self.eval(w_in, w_out, rng) * FloatConsts::PI)
}
}

7
ray-tracing-core/src/math/dir3.rs
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@ -68,6 +68,13 @@ impl Dir3 {
Dir3::new(Float::sin(phi) * r, Float::cos(theta), Float::cos(phi) * r)
}
pub fn sample_uniform_sphere<R: Rng>(rng: &mut R) -> Self {
let theta = Float::acos(1.0 - 2.0 * rng.gen::<Float>());
let phi = 2.0 * FloatConsts::PI * rng.gen::<Float>();
let r = Float::sin(theta);
Dir3::new(Float::sin(phi) * r, Float::cos(theta), Float::cos(phi) * r)
}
pub fn sample_cosine_hemisphere<R: Rng>(rng: &mut R) -> Self {
let mut d = Self::sample_disc(rng);
d.y = Float::sqrt(Float::max(0.0, 1.0 - d.x * d.x - d.z * d.z));