intersections: derive Debug for PrecomputedData.

rtchallenge/src/intersections.rs

@@ -135,6 +135,7 @@ impl<'i> Index<usize> for Intersections<'i> {
     }
 }
 
+#[derive(Debug)]
 pub struct PrecomputedData<'i> {
     pub t: f32,
     pub object: &'i Sphere,
@@ -205,6 +206,7 @@ pub fn prepare_computations<'i>(i: &'i Intersection, r: &Ray) -> PrecomputedData
     } else {
         (false, normalv)
     };
+
     let over_point = point + normalv * EPSILON;
     PrecomputedData {
         t: i.t,