mirror of
https://github.com/openmc-dev/openmc.git
synced 2026-07-21 14:35:27 -04:00
73 lines
3.3 KiB
ReStructuredText
73 lines
3.3 KiB
ReStructuredText
.. _devguide_user_input:
|
|
|
|
=========================
|
|
Making User Input Changes
|
|
=========================
|
|
|
|
Users are encouraged to use OpenMC's :ref:`pythonapi` to build XML files that
|
|
the OpenMC solver then reads during the initialization phase. Thus, to modify,
|
|
add, or remove user input options, changes must be made both within the Python
|
|
API and the Fortran source that reads XML files produced by the Python API. The
|
|
following steps should be followed to make changes to user input:
|
|
|
|
1. Determine the Python class you need to change. For example, if you are adding
|
|
a new setting, you probably want to change the :class:`openmc.Settings`
|
|
class. If you are adding a new surface type, you would need to create a
|
|
subclass of :class:`openmc.Surface`.
|
|
|
|
2. To add a new option, the class will need a `property attribute`_. For
|
|
example, if you wanted to add a "fast_mode" setting, you would need two
|
|
methods that look like:
|
|
|
|
.. code-block:: python
|
|
|
|
@property
|
|
def fast_mode(self):
|
|
...
|
|
|
|
@fast_mode.setter
|
|
def fast_mode(self, fast_mode):
|
|
...
|
|
|
|
3. Make sure that when an instance of the class is exported to XML (usually
|
|
through a ``export_to_xml()`` or ``to_xml_element()`` method), a new element
|
|
is written to the appropriate file. OpenMC uses the
|
|
:mod:`xml.etree.ElementTree` API, so refer to the documentation of that
|
|
module for guidance on creating elements/attributes.
|
|
|
|
4. Make sure that your input can be categorized as one of the datatypes from
|
|
`XML Schema Part 2`_ and that parsing of the data appropriately reflects
|
|
this. For example, for a boolean_ value, true can be represented either by
|
|
"true" or by "1".
|
|
|
|
5. Now that you're done with the Python side, you need to make modifications to
|
|
the Fortran codebase. Make appropriate changes in the `input_xml module`_ to
|
|
read your new user input. You should use procedures and types defined by the
|
|
`xml_interface module`_.
|
|
|
|
6. If you've made changes in the geometry or materials, make sure they are
|
|
written out to the statepoint or summary files and that the
|
|
:class:`openmc.StatePoint` and :class:`openmc.Summary` classes read them in.
|
|
|
|
7. Finally, a set of `RELAX NG`_ schemas exists that enables validation of input
|
|
files. You should modify the RELAX NG schema for the file you changed. The
|
|
easiest way to do this is to change the `compact syntax`_ file
|
|
(e.g. ``src/relaxng/geometry.rnc``) and then convert it to regular XML syntax
|
|
using trang_::
|
|
|
|
trang geometry.rnc geometry.rng
|
|
|
|
For most user input additions and changes, it is simple enough to follow a
|
|
"monkey see, monkey do" approach. When in doubt, contact your nearest OpenMC
|
|
developer or send a message to the `developers mailing list`_.
|
|
|
|
|
|
.. _property attribute: https://docs.python.org/3.6/library/functions.html#property
|
|
.. _XML Schema Part 2: http://www.w3.org/TR/xmlschema-2/
|
|
.. _boolean: http://www.w3.org/TR/xmlschema-2/#boolean
|
|
.. _xml_interface module: https://github.com/openmc-dev/openmc/blob/develop/src/xml_interface.F90
|
|
.. _input_xml module: https://github.com/openmc-dev/openmc/blob/develop/src/input_xml.F90
|
|
.. _RELAX NG: http://relaxng.org/
|
|
.. _compact syntax: http://relaxng.org/compact-tutorial-20030326.html
|
|
.. _trang: http://www.thaiopensource.com/relaxng/trang.html
|
|
.. _developers mailing list: https://groups.google.com/forum/?fromgroups=#!forum/openmc-dev
|