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# ***************************************************************************
# * Copyright (c) 2025 Mario Passaglia <mpassaglia[at]cbc.uba.ar> *
# * *
# * This file is part of FreeCAD. *
# * *
# * FreeCAD 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 2.1 of the *
# * License, or (at your option) any later version. *
# * *
# * FreeCAD 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 FreeCAD. If not, see *
# * <https://www.gnu.org/licenses/>. *
# * *
# ***************************************************************************
__title__ = "Tools for the work with CalculiX solver"
__author__ = "Mario Passaglia"
__url__ = "https://www.freecad.org"
from PySide.QtCore import QProcess, QThread, QProcessEnvironment
import tempfile
import os
import shutil
import FreeCAD
import Fem
from . import writer
from .. import settings
# from feminout import importCcxDatResults
from femmesh import meshsetsgetter
from femtools import membertools
class CalculiXTools:
name = "CalculiX"
def __init__(self, obj):
self.obj = obj
self.process = QProcess()
self.model_file = ""
self.analysis = obj.getParentGroup()
self.fem_param = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Fem")
self._create_working_directory(obj)
def _create_working_directory(self, obj):
"""
Create working directory according to preferences
"""
if not os.path.isdir(obj.WorkingDirectory):
gen_param = self.fem_param.GetGroup("General")
if gen_param.GetBool("UseTempDirectory"):
self.obj.WorkingDirectory = tempfile.mkdtemp(prefix="fem_")
elif gen_param.GetBool("UseBesideDirectory"):
root, ext = os.path.splitext(obj.Document.FileName)
if root:
self.obj.WorkingDirectory = os.path.join(root, obj.Label)
os.makedirs(self.obj.WorkingDirectory, exist_ok=True)
else:
# file not saved, use temporary
self.obj.WorkingDirectory = tempfile.mkdtemp(prefix="fem_")
elif gen_param.GetBool("UseCustomDirectory"):
self.obj.WorkingDirectory = gen_param.GetString("CustomDirectoryPath")
os.makedirs(self.obj.WorkingDirectory, exist_ok=True)
def prepare(self):
from femtools.checksanalysis import check_member_for_solver_calculix
self._clear_results()
message = check_member_for_solver_calculix(
self.analysis,
self.obj,
membertools.get_mesh_to_solve(self.analysis)[0],
membertools.AnalysisMember(self.analysis),
)
mesh_obj = membertools.get_mesh_to_solve(self.analysis)[0]
meshdatagetter = meshsetsgetter.MeshSetsGetter(
self.analysis,
self.obj,
mesh_obj,
membertools.AnalysisMember(self.analysis),
)
meshdatagetter.get_mesh_sets()
# write solver input
w = writer.FemInputWriterCcx(
self.analysis,
self.obj,
mesh_obj,
meshdatagetter.member,
self.obj.WorkingDirectory,
meshdatagetter.mat_geo_sets,
)
self.model_file = w.write_solver_input()
# report to user if task succeeded
self.input_deck = os.path.splitext(os.path.basename(self.model_file))[0]
def compute(self):
self._clear_results()
ccx_bin = settings.get_binary("Calculix")
env = QProcessEnvironment.systemEnvironment()
num_cpu = self.fem_param.GetGroup("Ccx").GetInt(
"AnalysisNumCPUs", QThread.idealThreadCount()
)
env.insert("OMP_NUM_THREADS", str(num_cpu))
pastix_prec = "1" if self.obj.PastixMixedPrecision else "0"
env.insert("PASTIX_MIXED_PRECISION", pastix_prec)
self.process.setProcessEnvironment(env)
self.process.setWorkingDirectory(self.obj.WorkingDirectory)
command_list = ["-i", os.path.join(self.obj.WorkingDirectory, self.input_deck)]
self.process.start(ccx_bin, command_list)
return self.process
def update_properties(self):
# TODO at the moment, only one .vtm file is assumed
self._load_ccxfrd_results()
self._load_ccxdat_results()
def _clear_results(self):
# result is a 'Result.vtm' file and a 'Result' directory
# with the .vtu files
dir_content = os.listdir(self.obj.WorkingDirectory)
for f in dir_content:
path = os.path.join(self.obj.WorkingDirectory, f)
base, ext = os.path.splitext(path)
if ext == ".vtm":
# remove .vtm file
os.remove(path)
# remove dir with .vtu files
shutil.rmtree(base)
elif ext == ".dat":
# remove .dat file
os.remove(path)
def _load_ccxdat_results(self):
# search dat output
dat = None
for res in self.obj.Results:
if res.isDerivedFrom("App::TextDocument"):
dat = res
if not dat:
# create dat output
dat = self.obj.Document.addObject("App::TextDocument", self.obj.Name + "Output")
self.analysis.addObject(dat)
tmp = self.obj.Results
tmp.append(dat)
self.obj.Results = tmp
files = os.listdir(self.obj.WorkingDirectory)
for f in files:
if f.endswith(".dat"):
dat_file = os.path.join(self.obj.WorkingDirectory, f)
with open(dat_file, "r") as file:
dat.Text = file.read()
break
def _load_ccxfrd_results(self):
# search current pipeline
pipeline = None
create = False
for res in self.obj.Results:
if res.isDerivedFrom("Fem::FemPostPipeline"):
pipeline = res
if not pipeline:
# create pipeline
pipeline = self.obj.Document.addObject("Fem::FemPostPipeline", self.obj.Name + "Result")
self.analysis.addObject(pipeline)
tmp = self.obj.Results
tmp.append(pipeline)
self.obj.Results = tmp
create = True
frd_result_prefix = os.path.join(self.obj.WorkingDirectory, self.input_deck)
binary_mode = self.fem_param.GetGroup("Ccx").GetBool("BinaryOutput", False)
Fem.frdToVTK(frd_result_prefix + ".frd", binary_mode)
files = os.listdir(self.obj.WorkingDirectory)
for f in files:
if f.endswith(".vtm"):
vtm_file = os.path.join(self.obj.WorkingDirectory, f)
pipeline.read(vtm_file)
pipeline.renameArrays(self.frd_var_conversion(self.obj.AnalysisType))
break
if create:
# default display mode
pipeline.ViewObject.DisplayMode = "Surface"
pipeline.ViewObject.SelectionStyle = "BoundBox"
pipeline.ViewObject.Field = self.get_default_field(self.obj.AnalysisType)
def frd_var_conversion(self, analysis_type):
common = {
"CONTACT": "Contact Displacement",
"PE": "Plastic Strain",
"CELS": "Contact Energy",
"ECD": "Current Density",
"EMFB": "Magnetic Field",
"EMFE": "Electric Field",
"ENER": "Internal Energy Density",
"DISP": "Displacement",
"TOSTRAIN": "Strain",
"STRESS": "Stress",
"STR(%)": "Error",
}
thermo = {"FLUX": "Heat Flux", "T": "Temperature"}
electrostatic = {"T": "Potential", "FLUX": "Electric Flux Density"}
match analysis_type:
case "thermomech":
common.update(thermo)
case "electromagnetic":
common.update(electrostatic)
return common
def get_default_field(self, analysis_type):
match analysis_type:
case "static" | "frequency" | "buckling":
return "Displacement"
case "thermomech":
return "Temperature"
case "electromagnetic":
return "Potential"
def version(self):
p = QProcess()
ccx_bin = settings.get_binary("Calculix")
p.start(ccx_bin, ["-v"])
p.waitForFinished()
info = p.readAll().data().decode()
return info
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