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optimize random_point_in_unit_sphere

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This commit is contained in:
Ishan Jain 2023-05-31 16:53:02 +05:30
parent 922d0f1656
commit 185791eddb
Signed by: ishan
GPG Key ID: 0506DB2A1CC75C27
1 changed files with 13 additions and 5 deletions
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18
src/materials/mod.rs
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@ -58,11 +58,19 @@ fn refract(incident: Vec3, normal: Vec3, ni_over_nt: f64) -> Option<Vec3> {
}
fn random_point_in_unit_sphere<R: Rng + ?Sized>(rng: &mut R) -> Vec3 {
let mut point = Vec3::random(rng) * 2.0 - Vec3::splat(1.0);
while point.sq_len() >= 1.0 {
point = Vec3::random(rng) * 2.0 - Vec3::splat(1.0);
}
point
let u: f64 = rng.gen();
let v: f64 = rng.gen();
let theta = u * 2.0 * std::f64::consts::PI;
let phi = (2.0 * v - 1.0).acos();
let radius = rng.gen::<f64>().cbrt();
let x = radius * phi.sin() * theta.cos();
let y = radius * phi.sin() * theta.sin();
let z = radius * phi.cos();
Vec3::new(x, y, z)
}
pub trait MaterialBuilder<T> {