plexx-dev/raychel-rs
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cleanup

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plexx
2023-01-27 01:01:09 +01:00
parent a09d7bc775
commit 52ea780ca7
1 changed files with 5 additions and 5 deletions
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10
src/main.rs
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@@ -11,15 +11,15 @@ use crate::{
fn hit_sphere(center: &Point3, radius: f64, r: &Ray) -> f64 { fn hit_sphere(center: &Point3, radius: f64, r: &Ray) -> f64 {
let oc = r.origin() - *center; let oc = r.origin() - *center;
let a = r.direction().dot(&r.direction()); let a = r.direction().length_squared();
let b = 2.0 * oc.dot(&r.direction()); let half_b = oc.dot(&r.direction());
let c = oc.dot(&oc) - radius*radius; let c = oc.length_squared() - radius*radius;
let discriminant = b*b - 4.0*a*c; let discriminant = half_b*half_b - a*c;
if discriminant < 0.0 { if discriminant < 0.0 {
-1.0 -1.0
} else { } else {
(-b - discriminant.sqrt()) / (2.0 * a) (-half_b - discriminant.sqrt()) / a
} }
} }