def add(self, entity): verify_attrs(entity, [('width'), 'height']) entity.register_handler('input', self.handle_input)
def add(self, entity): verify_attrs(entity, ['angle', ('va', 0)]) entity.register_handler('update', self.handle_update) entity.register_handler('input', self.handle_input)
def add(self, entity): verify_attrs(entity, [('vx', 0), ('vy', 0)]) entity.register_handler('input', self.handle_input)