ft: 8: anti-aliasing

src/vec3.rs

@@ -67,9 +67,9 @@ impl Vec3 {
     }
 
     pub fn output(self) -> image::Rgb<u8> {
-        let ir = (255.599 * self.r) as u8;
-        let ig = (255.599 * self.g) as u8;
-        let ib = (255.599 * self.b) as u8;
+        let ir = (255.599 * self.r.clamp(0., 1.)) as u8;
+        let ig = (255.599 * self.g.clamp(0., 1.)) as u8;
+        let ib = (255.599 * self.b.clamp(0., 1.)) as u8;
 
         image::Rgb([ir, ig, ib])
     }