get_b_from_angle
================

.. py:method:: luminet.isoradial.Isoradial.get_b_from_angle(angle: float | numpy.ndarray) -> float | numpy.ndarray

   Get the impact parameter :math:`b` for a given angle :math:`\alpha` on the isoradial.

   This method does not calculate the impact parameter, but rather finds the closest
   impact parameter to the given angle.

   :Parameters: **angle** (*float | np.ndarray*) -- Angle :math:`\alpha` in radians.

   .. seealso:: :py:meth:`calc_b_from_angle` to explicitly solve for the impact parameter.

   :returns: float | :class:`~numpy.ndarray` -- The impact parameter :math:`b` for the given angle :math:`\alpha`.