:py:mod:`src.costs.abstract_shape_gradient`
===========================================

.. py:module:: src.costs.abstract_shape_gradient


Module Contents
---------------

Classes
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.. autoapisummary::

   src.costs.abstract_shape_gradient.Abstract_shape_gradient




.. py:class:: Abstract_shape_gradient

   Bases: :py:obj:`abc.ABC`

   An Abstract_shape_gradient is the interface for any cost

   :param S: a surface
   :type S: for now only Surface_Fourier are supported

   .. py:method:: cost(self, S)
      :abstractmethod:


   .. py:method:: shape_gradient(self, S, theta_pertubation)
      :abstractmethod:

      The implementation of the shape gradient

      :param S: a surface
      :type S: for now only Surface_Fourier are supported
      :param theta_pertubation: see `get_theta_perturbation of a surface`
      :type theta_pertubation: dictionary