httk.atomistic.numeric_sites
============================

.. py:module:: httk.atomistic.numeric_sites

.. autoapi-nested-parse::

   The NumericSites presentation: a Sites object exposed as plain numpy numbers.



Classes
-------

.. autoapisummary::

   httk.atomistic.numeric_sites.NumericSites


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

.. py:class:: NumericSites(sites: httk.atomistic.sites_like.SitesLike)

   A plain-numpy presentation of a :class:`~httk.atomistic.Sites` object.

   Where a ``Sites`` holds its reduced coordinates exactly (an Nx3 rational
   :class:`~httk.core.FracVector`), a ``NumericSites`` mirrors that interface but returns plain
   ``float64`` numpy arrays, for callers who do not need exact arithmetic and just want numpy arrays.
   It is len/iter/indexable over its rows, each yielded as a ``(3,)`` numpy array.

   The presentation is numpy-backed, so constructing a ``NumericSites`` **requires numpy** (the
   ``httk-atomistic[numpy]`` extra) and raises :class:`ImportError` eagerly when it is unavailable.
   The exact object is always one hop away via :attr:`exact`.


   .. py:property:: reduced_coords
      :type: httk.core.NumericVector


      The Nx3 reduced site coordinates as a ``float64`` numpy array.


   .. py:property:: exact
      :type: httk.atomistic.sites.Sites


      The exact :class:`~httk.atomistic.Sites` this presentation wraps.