def __init__(self, bbox, transform):
assert bbox.is_bbox<EOL>assert isinstance(transform, Transform)<EOL>assert transform.input_dims == <NUM_LIT:2><EOL>assert transform.output_dims == <NUM_LIT:2><EOL>BboxBase.__init__(self)<EOL>self._bbox = bbox<EOL>self._transform = transform<EOL>self.set_children(bbox, transform)<EOL>self._points = None<EOL>
*bbox*: a child :class:`Bbox`

*transform*: a 2D :class:`Transform`