normalise can call (/)

src/tuple/mod.rs

@@ -45,14 +45,7 @@ impl Tuple {
 	}
 
 	pub fn normalise(&self) -> Self {
-		let mag = self.magnitude();
-
-		tuple(
-			self.x / mag,
-			self.y / mag,
-			self.z / mag,
-			self.w / mag,
-		)
+		self / self.magnitude()
 	}
 }