upd metal fuzz

1 files changed, 8 insertions, 4 deletions

diff --git a/src/material.rs b/src/material.rs
index 2b3deae..731eb0c 100644
--- a/src/material.rs
+++ b/src/material.rs
@@ -10,12 +10,14 @@ pub enum MaterialType {
 
 pub struct Material {
     pub material_type: MaterialType,
-    pub albedo: Color
+    pub albedo: Color,
+    pub fuzz: f32,
 }
 
 impl Material {
-    pub fn new(albedo: Color, material_type: MaterialType) -> Self {
-        Self { albedo, material_type }
+    pub fn new(albedo: Color, material_type: MaterialType, fuzz: f32) -> Self {
+        let fuzz = if fuzz < 1.0 { fuzz } else { 1.0 };
+        Self { albedo, material_type, fuzz }
     }
 
     pub fn scatter(&self, r_in: &Ray, rec: &HitRecord, attenuation: &mut Color, scattered: &mut Ray) -> bool {
@@ -29,7 +31,9 @@ impl Material {
                 }
             }
             MaterialType::Metal => {
-                r_in.reflect(&rec.normal)
+                let mut reflected = r_in.reflect(&rec.normal);
+                reflected.unit().add(&Vec3::random_unit().scalar_mul(self.fuzz))
+
             }
         };
         scattered.origin = rec.position;