190 lines
7.8 KiB
Python
190 lines
7.8 KiB
Python
# ***************************************************************************
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# * Copyright (c) 2017 Markus Hovorka <m.hovorka@live.de> *
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# * *
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# * This file is part of the FreeCAD CAx development system. *
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# * *
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# * This program is free software; you can redistribute it and/or modify *
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# * it under the terms of the GNU Lesser General Public License (LGPL) *
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# * as published by the Free Software Foundation; either version 2 of *
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# * the License, or (at your option) any later version. *
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# * for detail see the LICENCE text file. *
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# * *
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# * This program is distributed in the hope that it will be useful, *
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# * but WITHOUT ANY WARRANTY; without even the implied warranty of *
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# * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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# * GNU Library General Public License for more details. *
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# * *
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# * You should have received a copy of the GNU Library General Public *
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# * License along with this program; if not, write to the Free Software *
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# * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
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# * USA *
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# * *
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# ***************************************************************************
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__title__ = "FreeCAD FEM solver Elmer tasks"
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__author__ = "Markus Hovorka"
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__url__ = "https://www.freecadweb.org"
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## \addtogroup FEM
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# @{
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import os
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import os.path
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import subprocess
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import sys
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from platform import system
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import FreeCAD
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from . import writer
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from .. import run
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from .. import settings
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from femtools import femutils
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from femtools import membertools
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class Check(run.Check):
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def run(self):
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self.pushStatus("Checking analysis...\n")
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if (self.checkMesh()):
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self.checkMeshType()
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self.checkMaterial()
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self.checkEquations()
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def checkMeshType(self):
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mesh = membertools.get_single_member(self.analysis, "Fem::FemMeshObject")
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if not femutils.is_of_type(mesh, "Fem::FemMeshGmsh"):
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self.report.error(
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"Unsupported type of mesh. "
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"Mesh must be created with gmsh.")
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self.fail()
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return False
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return True
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def checkEquations(self):
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equations = self.solver.Group
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if not equations:
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self.report.error(
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"Solver has no equations. "
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"Add at least one equation.")
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self.fail()
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class Prepare(run.Prepare):
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def run(self):
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# TODO print working dir to report console
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self.pushStatus("Preparing input files...\n")
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if self.testmode:
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# test mode: neither gmsh, nor elmergrid nor elmersolver binaries needed
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FreeCAD.Console.PrintMessage("Machine testmode: {}\n".format(self.testmode))
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w = writer.Writer(self.solver, self.directory, True)
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else:
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FreeCAD.Console.PrintLog("Machine testmode: {}\n".format(self.testmode))
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w = writer.Writer(self.solver, self.directory)
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try:
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w.write()
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self.checkHandled(w)
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except writer.WriteError as e:
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self.report.error(str(e))
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self.fail()
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except IOError:
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self.report.error("Can't access working directory.")
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self.fail()
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def checkHandled(self, w):
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handled = w.getHandledConstraints()
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allConstraints = membertools.get_member(self.analysis, "Fem::Constraint")
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for obj in set(allConstraints) - handled:
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self.report.warning("Ignored constraint %s." % obj.Label)
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class Solve(run.Solve):
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def run(self):
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# on rerun the result file will not deleted before starting the solver
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# if the solver fails, the existing result from a former run file will be loaded
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# TODO: delete result file (may be delete all files which will be recreated)
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self.pushStatus("Executing solver...\n")
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binary = settings.get_binary("ElmerSolver")
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if binary is not None:
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# if ELMER_HOME is not set, set it.
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# Needed if elmer is compiled but not installed on Linux
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# http://www.elmerfem.org/forum/viewtopic.php?f=2&t=7119
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# https://stackoverflow.com/questions/1506010/how-to-use-export-with-python-on-linux
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# TODO move retrieving the param to solver settings module
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elparams = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Fem/Elmer")
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elmer_env = elparams.GetBool("SetElmerEnvVariables", False)
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if elmer_env is True and system() == "Linux" and "ELMER_HOME" not in os.environ:
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solvpath = os.path.split(binary)[0]
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if os.path.isdir(solvpath):
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os.environ["ELMER_HOME"] = solvpath
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os.environ["LD_LIBRARY_PATH"] = "$LD_LIBRARY_PATH:{}/modules".format(solvpath)
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self._process = subprocess.Popen(
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[binary], cwd=self.directory,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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self.signalAbort.add(self._process.terminate)
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output = self._observeSolver(self._process)
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self._process.communicate()
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self.signalAbort.remove(self._process.terminate)
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if not self.aborted:
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self._updateOutput(output)
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else:
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self.report.error("ElmerSolver executable not found.")
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self.fail()
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def _updateOutput(self, output):
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if self.solver.ElmerOutput is None:
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self._createOutput()
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if sys.version_info.major >= 3:
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self.solver.ElmerOutput.Text = output
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else:
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self.solver.ElmerOutput.Text = output.decode("utf-8")
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def _createOutput(self):
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self.solver.ElmerOutput = self.analysis.Document.addObject(
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"App::TextDocument", self.solver.Name + "Output")
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self.solver.ElmerOutput.Label = self.solver.Label + "Output"
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# App::TextDocument has no Attribute ReadOnly
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# TODO check if the attribute has been removed from App::TextDocument
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# self.solver.ElmerOutput.ReadOnly = True
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self.analysis.addObject(self.solver.ElmerOutput)
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self.solver.Document.recompute()
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class Results(run.Results):
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def run(self):
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if self.solver.ElmerResult is None:
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self._createResults()
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postPath = self._getResultFile()
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self.solver.ElmerResult.read(postPath)
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self.solver.ElmerResult.getLastPostObject().touch()
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self.solver.Document.recompute()
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def _createResults(self):
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self.solver.ElmerResult = self.analysis.Document.addObject(
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"Fem::FemPostPipeline", self.solver.Name + "Result")
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self.solver.ElmerResult.Label = self.solver.Label + "Result"
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self.analysis.addObject(self.solver.ElmerResult)
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def _getResultFile(self):
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postPath = None
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# elmer post file path changed with version x.x
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# see https://forum.freecadweb.org/viewtopic.php?f=18&t=42732
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# workaround
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possible_post_file_0 = os.path.join(self.directory, "case0001.vtu")
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possible_post_file_t = os.path.join(self.directory, "case_t0001.vtu")
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if os.path.isfile(possible_post_file_0):
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postPath = possible_post_file_0
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elif os.path.isfile(possible_post_file_t):
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postPath = possible_post_file_t
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else:
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self.report.error("Result file not found.")
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self.fail()
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return postPath
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## @}
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