use serde::Deserialize;

use crate::{
    objects::{hit::Hit, materials::traits::Material},
    ray::Ray,
    vec3::Vec3,
};

#[derive(Debug, Deserialize)]
pub struct Normal {}

impl Material for Normal {
    fn scatter(&self, hit: &Hit, ray: &Ray) -> Option<(Ray, Vec3)> {
        let refl = ray.dir().reflect(hit.n()).get_unit();
        Some((Ray::new(*hit.p(), refl), (hit.n() + 1.) / 2.))
    }
}