def centerAroundOrigin(poly):
    """
    Shifts the center of the bounding box to origin.

    :Arguments:
        - p: Polygon
    :Returns:
        None
    """
    x0, x1, y0, y1 = poly.boundingBox()
    poly.shift(-0.5 * (x0 + x1), -0.5 * (y0 + y1))
