init

1 files changed, 18 insertions, 0 deletions

diff --git a/src/material/metal.rs b/src/material/metal.rs
new file mode 100644
index 0000000..2865a2f
--- /dev/null
+++ b/src/material/metal.rs
@@ -0,0 +1,18 @@
+use super::Material;
+use crate::{hittable::HitRecord, vec3::Vec3};
+use crate::vec3::Color;
+use crate::ray::Ray;
+
+pub struct Metal {
+    pub albedo: Color,
+    pub fuzz: f64, // TODO: This should have value 0.0 - 1.0; this is not enforced
+}
+
+impl Material for Metal {
+    fn scatter(&self, ray_in: &Ray, hit_record: &HitRecord, attenuation: &mut Color, scattered: &mut Ray) -> bool {
+        let reflected = ray_in.direction.unit_vector().reflect(&hit_record.normal);
+        *scattered = Ray { origin: hit_record.p.clone(), direction: reflected + self.fuzz * Vec3::random_in_unit_sphere(), time: ray_in.time };
+        *attenuation = self.albedo.clone();
+        scattered.direction.dot(&hit_record.normal) > 0.0
+    }
+}