httk.atomistic.models.sites.numeric
===================================

.. py:module:: httk.atomistic.models.sites.numeric

.. autoapi-nested-parse::

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



Classes
-------

.. autoapisummary::

   httk.atomistic.models.sites.numeric.NumericSites


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

.. py:class:: NumericSites(sites)

   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`.

   :param sites: The sites or sites-like object to present.


   .. py:property:: precision
      :type: float | None


      The fractional coordinate precision, or ``None`` if unknown.

      :return: The precision as a floating-point value.


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


      The Nx3 reduced site coordinates.

      :return: The coordinates as floating-point values.


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


      The exact sites this presentation wraps.

      :return: The exact sites.