class gameobj(object):
	role_factory = {}
	
	@staticmethod
	def create_role_factory(role, factory):
		gameobj.role_factory[role] = factory

	def __init__(self, self.pos):
		self.pos = pos
		self.roles = []
		self.effects = []
		
	def add_role(self, role):
		assert not type(role) in [type(x) for x in self.roles]
		for i, r in enumerate(self.roles):
			if role is r:
				break
			if role.order < r.order:
				self.roles.insert(i, role)
				break
	
	def remove_role(self, role):
		for 
				
	def ai(self):
		pass
	
	def handle_input(self):
		pass
	
	def move(self):
		pass
		
	def animate(self):
		pass
		
	def collide(self):
		pass
		
	def prerender(self):
		pass


gameobj.create_role_factory('ai', ai_role)

class role(object):
	order = 1000
	def __init__(self):
		pass
		
class ai_role(role):
	order = 200
	pass
		
class visible_role(role):
	order = 10000
	pass
		
class corporeal_role(role):
	order = 500
	pass
		
class animated_role(role):
	order = 400
	pass
		
class movable_role(role):
	order = 300
	pass
		
class player_role(role):
	order = 100
	pass
		
class light_role(role):
	order = 9000
	pass
		
class _role(role):
	pass