laying out data

src/Physics/Classes/Collidible.hs

@@ -67,7 +67,14 @@ class (Show c, Mass c) => Collidible c where
     -> other                           -- ^ second object
     -> CollisionResult Double (V2 Int) -- ^ Do the objects collide?
   collisionCheck m1 m2 =
-    error "collisionCheck: not yet implemented!"
+    let p1@(V2 p1x p1y) = position m1
+        p2@(V2 p2x p2y) = position m2
+        v1@(V2 v1x v1y) = velocity m1
+        v2@(V2 v2x v2y) = velocity m2
+        (V2 dvx dvy)    = v1 - v2
+        (V2 dx dy)      = p1 - p2
+    in
+      error "collisionCheck: Not yet implemented!"
 
   -- | This Function is called for every collision on both colliding objects.
   collide