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use crate::{
material::Material,
ray::Ray,
vec3::{random_in_unit_sphere, reflect, Color},
};
pub struct Metal {
color: Color,
fuzz: f64,
}
impl Metal {
pub fn new(color: Color, fuzz: f64) -> Self {
Self { color, fuzz }
}
}
impl Material for Metal {
fn scatter(
&self,
ray: &crate::ray::Ray,
rec: &crate::geometry::HitRecord,
) -> Option<(Ray, Color)> {
let reflected = reflect(&ray.direction().unit_vector(), &rec.normal);
let scattered = Ray::new(rec.point, reflected + self.fuzz * random_in_unit_sphere());
if scattered.direction().dot(&rec.normal) < 0.0 {
None
} else {
Some((scattered, self.color))
}
}
}
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