def add_mob(self,
mob: Mob,
x: float,
y: float,
mass: float = 100,
friction: float = 1.):
"""Adds a mob to the game world centred at the position ('x', 'y')
Parameters:
mob (Mob): The mob to add to the game world
- See add_thing for other parameters
"""
self.add_thing(mob,
x,
y,
mob.get_size(),
collision_type=self._collision_types['mob'],
categories=self._thing_categories["mob"],
mass=mass,
friction=friction)
