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tasks.py
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tasks.py
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# ***************************************************************************
# * Copyright (c) 2017 Markus Hovorka <m.hovorka@live.de> *
# * *
# * This program is free software; you can redistribute it and/or modify *
# * it under the terms of the GNU Lesser General Public License (LGPL) *
# * as published by the Free Software Foundation; either version 2 of *
# * the License, or (at your option) any later version. *
# * for detail see the LICENCE text file. *
# * *
# * This program 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 Library General Public License for more details. *
# * *
# * You should have received a copy of the GNU Library General Public *
# * License along with this program; if not, write to the Free Software *
# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
# * USA *
# * *
# ***************************************************************************
__title__ = "FreeCAD FEM solver Elmer tasks"
__author__ = "Markus Hovorka"
__url__ = "http://www.freecadweb.org"
## \addtogroup FEM
# @{
import subprocess
import os.path
import sys
import FreeCAD
import femtools.femutils as femutils
from .. import run
from .. import settings
from . import writer
class Check(run.Check):
def run(self):
self.pushStatus("Checking analysis...\n")
if (self.checkMesh()):
self.checkMeshType()
self.checkMaterial()
self.checkEquations()
def checkMeshType(self):
mesh = femutils.get_single_member(self.analysis, "Fem::FemMeshObject")
if not femutils.is_of_type(mesh, "Fem::FemMeshGmsh"):
self.report.error(
"Unsupported type of mesh. "
"Mesh must be created with gmsh.")
self.fail()
return False
return True
def checkEquations(self):
equations = self.solver.Group
if not equations:
self.report.error(
"Solver has no equations. "
"Add at least one equation.")
self.fail()
class Prepare(run.Prepare):
def run(self):
self.pushStatus("Preparing input files...\n")
FreeCAD.Console.PrintMessage("Machine testmode: {}\n".format(self.testmode))
if self.testmode:
w = writer.Writer(self.solver, self.directory, True) # test mode
else:
w = writer.Writer(self.solver, self.directory)
try:
w.write()
self.checkHandled(w)
except writer.WriteError as e:
self.report.error(str(e))
self.fail()
except IOError:
self.report.error("Can't access working directory.")
self.fail()
def checkHandled(self, w):
handled = w.getHandledConstraints()
allConstraints = femutils.get_member(self.analysis, "Fem::Constraint")
for obj in set(allConstraints) - handled:
self.report.warning("Ignored constraint %s." % obj.Label)
class Solve(run.Solve):
def run(self):
self.pushStatus("Executing solver...\n")
binary = settings.get_binary("ElmerSolver")
if binary is not None:
self._process = subprocess.Popen(
[binary], cwd=self.directory,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
self.signalAbort.add(self._process.terminate)
output = self._observeSolver(self._process)
self._process.communicate()
self.signalAbort.remove(self._process.terminate)
if not self.aborted:
self._updateOutput(output)
else:
self.report.error("ElmerSolver executable not found.")
self.fail()
def _updateOutput(self, output):
if self.solver.ElmerOutput is None:
self._createOutput()
if sys.version_info.major >= 3:
self.solver.ElmerOutput.Text = output
else:
self.solver.ElmerOutput.Text = output.decode("utf-8")
def _createOutput(self):
self.solver.ElmerOutput = self.analysis.Document.addObject(
"App::TextDocument", self.solver.Name + "Output")
self.solver.ElmerOutput.Label = self.solver.Label + "Output"
self.solver.ElmerOutput.ReadOnly = True
self.analysis.addObject(self.solver.ElmerOutput)
class Results(run.Results):
def run(self):
if self.solver.ElmerResult is None:
self._createResults()
postPath = self._getResultFile()
self.solver.ElmerResult.read(postPath)
self.solver.ElmerResult.getLastPostObject().touch()
self.solver.Document.recompute()
def _createResults(self):
self.solver.ElmerResult = self.analysis.Document.addObject(
"Fem::FemPostPipeline", self.solver.Name + "Result")
self.solver.ElmerResult.Label = self.solver.Label + "Result"
self.analysis.addObject(self.solver.ElmerResult)
def _getResultFile(self):
postPath = None
# elmer post file path changed with version x.x
# see https://forum.freecadweb.org/viewtopic.php?f=18&t=42732
# workaround
possible_post_file_0 = os.path.join(self.directory, "case0001.vtu")
possible_post_file_t = os.path.join(self.directory, "case_t0001.vtu")
if os.path.isfile(possible_post_file_0):
postPath = possible_post_file_0
elif os.path.isfile(possible_post_file_t):
postPath = possible_post_file_t
else:
self.report.error("Result file not found.")
self.fail()
return postPath
## @}