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Adopt shorthand notation for half-spaces and regions in Python API

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Surfaces now have __neg__ and __pos__ operators, and regions have __and__,
__or__, and __invert__. This makes the syntax for complex regions much less
bulky.
This commit is contained in:
Paul Romano 2015-10-03 09:26:50 +07:00
parent f0da87cde0
commit 71dfde8d12
5 changed files with 32 additions and 31 deletions
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4
docs/source/usersguide/input.rst
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@ -896,7 +896,7 @@ Each ``<cell>`` element can have the following attributes or sub-elements:
the cell occupies. Each half-space is identified by the unique ID of the
surface prefixed by `-` or `+` to indicate that it is the negative or
positive half-space, respectively. The `+` sign for a positive half-space
can be omitted. Valid Boolean operators are parentheses, union `^`,
can be omitted. Valid Boolean operators are parentheses, union `|`,
complement `~`, and intersection. Intersection is implicit and indicated by
the presence of whitespace. The order of operator precedence is parentheses,
complement, intersection, and then union.
@ -908,7 +908,7 @@ Each ``<cell>`` element can have the following attributes or sub-elements:
.. code-block:: xml
<cell id="1" material="1" region="-3 ^ ~(5 -2)" />
<cell id="1" material="1" region="-3 | ~(5 -2)" />
.. note:: The ``region`` attribute/element can be omitted to make a cell
fill its entire universe.