Fix physics engine

modules/ces/system/physics-engine-2d.scm

@@ -1,14 +1,14 @@
-(define-module (ces system tilemap-renderer)
+(define-module (ces system physics-engine-2d)
   #:pure
   #:use-module (scheme base)
   #:use-module (math vector)
   #:use-module (ces system)
   #:use-module (ces component)
   #:use-module (ces entity)
-  #:export (create-physics-engine))
+  #:export (create-physics-engine-2d))
 
 ;(define desired-components '('imass 'position 'velocity 'acceleration))
-(define desired-components '('position 'velocity 'acceleration))
+(define desired-components '('hitbox 'position 'velocity 'acceleration))
 
 (define (wants-entity? entity)
     (and (game-entity? entity)
@@ -36,7 +36,7 @@
                     ;; reset entity
                     (reset-entity! (get-entity-manager) updated-entity)))))
 
-(define (create-physics-engine)
+(define (create-physics-engine-2d)
     (create-system wants-entity?
         (lambda (entity dt)
             (update-physics-entity entity dt))))