/usr/lib/python2.7/dist-packages/FIAT/bubble.py is in python-fiat 2017.2.0.0-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | # Copyright (C) 2013 Andrew T. T. McRae (Imperial College London)
# Copyright (C) 2015 Jan Blechta
#
# This file is part of FIAT.
#
# FIAT is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# FIAT is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with FIAT. If not, see <http://www.gnu.org/licenses/>.
from __future__ import absolute_import, print_function, division
from FIAT.lagrange import Lagrange
from FIAT.restricted import RestrictedElement
class Bubble(RestrictedElement):
"""The Bubble finite element: the interior dofs of the Lagrange FE"""
def __init__(self, ref_el, degree):
element = Lagrange(ref_el, degree)
cell_dim = ref_el.get_dimension()
assert cell_dim == max(element.entity_dofs().keys())
cell_entity_dofs = element.entity_dofs()[cell_dim][0]
if len(cell_entity_dofs) == 0:
raise RuntimeError('Bubble element of degree %d has no dofs' % degree)
super(Bubble, self).__init__(element, indices=cell_entity_dofs)
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