instantiate collision engine in area

obj/Area.lua

@@ -3,12 +3,14 @@
 ---@class Area:Object
 ---@field room Room
 ---@field game_objects GameObject[]
+---@field world table|nil
 local Area = Object:extend()
 
 ---Instantiates area
 function Area:new(room)
     self.room = room
     self.game_objects = {}
+    self.world = nil
 end
 
 ---Updates area
@@ -36,4 +38,10 @@ function Area:addGameObject(game_object_type, x, y, opts)
     return game_object
 end
 
+---Initializes HC physics as a world
+---@param cell_size number|nil
+function Area:addPhysicsWorld(cell_size)
+    self.world = HC(cell_size or 100)
+end
+
 return Area

rooms/Stage.lua

@@ -3,7 +3,7 @@ local Stage = Room:extend()
 
 function Stage:new()
     Stage.super.new(self)
-
+    self.area:addPhysicsWorld()
     self.area:addGameObject('Player', gw/2, gh/2)
 end