1 files changed, 2 insertions, 2 deletions
diff --git a/lib/hittable.rb b/lib/hittable.rb
index 2a433d8..1e22613 100644
--- a/lib/hittable.rb
+++ b/lib/hittable.rb
@@ -45,8 +45,8 @@ class Hittables < Hittable
 end
 
 class Sphere < Hittable
-  def initialize(ox, oy, oz, radius = 1, material)
-    @centre = Point.new(ox, oy, oz)
+  def initialize(centre, radius = 1, material)
+    @centre = centre
     @radius = radius
     @material = material
   end