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"This demo illustrates basic inspection of mesh quality."
# Copyright (C) 2013 Jan Blechta
#
# This file is part of DOLFIN.
#
# DOLFIN 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.
#
# DOLFIN 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 DOLFIN. If not, see <http://www.gnu.org/licenses/>.
#
# First added: 2013-11-19
# Last changed:
from dolfin import *
import matplotlib.pyplot as plt
# Read mesh from file
mesh = Mesh("../dolfin_fine.xml.gz")
# Print minimal and maximal radius ratio
qmin, qmax = MeshQuality.radius_ratio_min_max(mesh)
print('Minimal radius ratio:', qmin)
print('Maximal radius ratio:', qmax)
# Show histogram using matplotlib
hist = MeshQuality.radius_ratio_matplotlib_histogram(mesh)
hist = hist.replace(' import matplotlib.pylab', ' import matplotlib\n matplotlib.use(\'Agg\')\n import matplotlib.pylab\n')
hist = hist.replace('matplotlib.pylab.show()', 'matplotlib.pylab.savefig("mesh-quality.pdf")')
print(hist)
exec(hist)
# Show mesh
plot(mesh)
plt.show()
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