patterns: implement object and pattern transformation awareness.

rtchallenge/examples/eoc6.rs

@@ -44,7 +44,15 @@ fn main() -> Result<()> {
                 let point = r.position(hit.t);
                 let normal = hit.object.normal_at(point);
                 let eye = -r.direction;
-                let color = lighting(&hit.object.material, &light, point, eye, normal, in_shadow);
+                let color = lighting(
+                    &hit.object.material,
+                    &hit.object,
+                    &light,
+                    point,
+                    eye,
+                    normal,
+                    in_shadow,
+                );
                 c.set(x, y, color);
             }
         }