diff --git a/rtiow/src/bin/tracer.rs b/rtiow/src/bin/tracer.rs
index 6eefec5..313382c 100644
--- a/rtiow/src/bin/tracer.rs
+++ b/rtiow/src/bin/tracer.rs
@@ -178,6 +178,8 @@ fn build_scene_cube(opt: &Opt) -> Scene {
     let lookat = Vec3::new(0., 0., 0.);
     let dist_to_focus = (lookfrom - lookat).length();
     let aperture = 0.1;
+    let time_min = 0.;
+    let time_max = 1.;
     let camera = Camera::new(
         lookfrom,
         lookat,
@@ -186,6 +188,8 @@ fn build_scene_cube(opt: &Opt) -> Scene {
         opt.width as f32 / opt.height as f32,
         aperture,
         dist_to_focus,
+        time_min,
+        time_max,
     );
     let world = HitableList::new(vec![
         Box::new(Sphere::new(
diff --git a/rtiow/src/cube.rs b/rtiow/src/cube.rs
index b127e46..21b8e06 100644
--- a/rtiow/src/cube.rs
+++ b/rtiow/src/cube.rs
@@ -23,9 +23,9 @@ impl Cube {
 
 impl Hit for Cube {
     fn hit(&self, r: Ray, t_min: f32, t_max: f32) -> Option<HitRecord> {
-        let oc = r.origin() - self.center;
-        let a = dot(r.direction(), r.direction());
-        let b = dot(oc, r.direction());
+        let oc = r.origin - self.center;
+        let a = dot(r.direction, r.direction);
+        let b = dot(oc, r.direction);
         let c = dot(oc, oc) - self.length * self.length;
         let discriminant = b * b - a * c;
         if discriminant > 0. {