diff --git a/rtchallenge/src/shapes.rs b/rtchallenge/src/shapes.rs
index 30eb8e3..1f64a98 100644
--- a/rtchallenge/src/shapes.rs
+++ b/rtchallenge/src/shapes.rs
@@ -261,9 +261,10 @@ impl Shape {
 /// assert_eq!(xs[0].object, &p);
 /// ```
 pub fn intersect<'s>(shape: &'s Shape, ray: &Ray) -> Intersections<'s> {
+    let local_ray = ray.transform(shape.inverse_transform);
     match shape.geometry {
-        Geometry::Sphere => sphere::intersect(shape, ray),
-        Geometry::Plane => plane::intersect(shape, ray),
+        Geometry::Sphere => sphere::intersect(shape, &local_ray),
+        Geometry::Plane => plane::intersect(shape, &local_ray),
     }
 }
 
@@ -275,7 +276,6 @@ mod sphere {
         tuples::{dot, Tuple},
     };
     pub fn intersect<'s>(shape: &'s Shape, ray: &Ray) -> Intersections<'s> {
-        let ray = ray.transform(shape.inverse_transform);
         let sphere_to_ray = ray.origin - Tuple::point(0., 0., 0.);
         let a = dot(ray.direction, ray.direction);
         let b = 2. * dot(ray.direction, sphere_to_ray);