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importFenicsMesh.py
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importFenicsMesh.py
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# ***************************************************************************
# * *
# * Copyright (c) 2017 - Johannes Hartung <j.hartung@gmx.net> *
# * *
# * 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 Fenics mesh reader and writer"
__author__ = "Johannes Hartung"
__url__ = "http://www.freecadweb.org"
## @package importFenicsMesh
# \ingroup FEM
# \brief FreeCAD Fenics Mesh reader and writer for FEM workbench
import os
import FreeCAD
import FreeCADGui
if FreeCAD.GuiUp == 1:
from PySide import QtGui, QtCore
from . import importToolsFem
from . import readFenicsXML
from . import writeFenicsXML
from . import writeFenicsXDMF
# Template copied from importZ88Mesh.py. Thanks Bernd!
# ********* generic FreeCAD import and export methods *********
if open.__module__ == '__builtin__':
# because we'll redefine open below (Python2)
pyopen = open
elif open.__module__ == 'io':
# because we'll redefine open below (Python3)
pyopen = open
if FreeCAD.GuiUp == 1:
class WriteXDMFTaskPanel:
"""
This task panel is used to write mesh groups with user defined values.
It will called if there are mesh groups detected. Else it will be bypassed.
"""
def __init__(self, fem_mesh_obj, fileString):
self.form = FreeCADGui.PySideUic.loadUi(os.path.join(
FreeCAD.getHomePath(),
"Mod/Fem/Resources/ui/MeshGroupXDMFExport.ui"
))
self.result_dict = {}
self.fem_mesh_obj = fem_mesh_obj
self.fileString = fileString
self.convert_fem_mesh_obj_to_table()
def convert_fem_mesh_obj_to_table(self):
def ro(item):
item.setFlags(~QtCore.Qt.ItemIsEditable & ~QtCore.Qt.ItemIsEnabled)
return item
gmshgroups = importToolsFem.get_FemMeshObjectMeshGroups(
self.fem_mesh_obj
)
fem_mesh = self.fem_mesh_obj.FemMesh
self.form.tableGroups.setRowCount(0)
self.form.tableGroups.setRowCount(len(gmshgroups))
for (ind, gind) in enumerate(gmshgroups):
# group number
self.form.tableGroups.setItem(ind, 0,
ro(QtGui.QTableWidgetItem(
str(gind))))
# group name
self.form.tableGroups.setItem(ind, 1,
ro(QtGui.QTableWidgetItem(
fem_mesh.getGroupName(gind))))
# group elements
self.form.tableGroups.setItem(ind, 2,
ro(QtGui.QTableWidgetItem(
fem_mesh.getGroupElementType(
gind))))
# default value for not marked elements
self.form.tableGroups.setItem(ind, 3,
QtGui.QTableWidgetItem(str(0)))
# default value for marked elements
self.form.tableGroups.setItem(ind, 4,
QtGui.QTableWidgetItem(str(1)))
header = self.form.tableGroups.horizontalHeader()
header.setResizeMode(0, QtGui.QHeaderView.ResizeToContents)
header.setResizeMode(1, QtGui.QHeaderView.ResizeToContents)
header.setResizeMode(2, QtGui.QHeaderView.ResizeToContents)
header.setResizeMode(3, QtGui.QHeaderView.ResizeToContents)
header.setResizeMode(4, QtGui.QHeaderView.Stretch)
def convert_table_to_group_dict(self):
group_values_dict = {}
num_rows = self.form.tableGroups.rowCount()
for r in range(num_rows):
g = int(self.form.tableGroups.item(r, 0).text())
# read-only no prob
default_value = 0
marked_value = 1
try:
default_value = int(self.form.tableGroups.item(r, 3).text())
marked_value = int(self.form.tableGroups.item(r, 4).text())
except ValueError:
FreeCAD.Console.PrintError(
"ERROR: value conversion failed "
"in table to dict: assuming 0 for default, "
"1 for marked.\n"
)
group_values_dict[g] = (marked_value, default_value)
return group_values_dict
def accept(self):
group_values_dict = self.convert_table_to_group_dict()
writeFenicsXDMF.write_fenics_mesh_xdmf(
self.fem_mesh_obj, self.fileString,
group_values_dict=group_values_dict)
FreeCADGui.Control.closeDialog()
def open(filename):
"called when freecad opens a file"
docname = os.path.splitext(os.path.basename(filename))[0]
insert(filename, docname)
def insert(filename, docname):
"called when freecad wants to import a file"
try:
doc = FreeCAD.getDocument(docname)
except NameError:
doc = FreeCAD.newDocument(docname)
FreeCAD.ActiveDocument = doc
import_fenics_mesh(filename)
def export(objectslist, fileString, group_values_dict_nogui=None):
"""
Called when freecad exports a file.
group_dict_no_gui: dictionary with group_numbers as keys and tuples
of (marked_value (default=1), default_value (default=0))
"""
if len(objectslist) != 1:
FreeCAD.Console.PrintError(
"This exporter can only export one object.\n")
return
obj = objectslist[0]
if not obj.isDerivedFrom("Fem::FemMeshObject"):
FreeCAD.Console.PrintError("No FEM mesh object selected.\n")
return
if fileString != "":
fileName, fileExtension = os.path.splitext(fileString)
if fileExtension.lower() == '.xml':
FreeCAD.Console.PrintWarning(
"XML is not designed to save higher order elements.\n")
FreeCAD.Console.PrintWarning(
"Reducing order for second order mesh.\n")
FreeCAD.Console.PrintWarning("Tri6 -> Tri3, Tet10 -> Tet4, etc.\n")
writeFenicsXML.write_fenics_mesh_xml(obj, fileString)
elif fileExtension.lower() == '.xdmf':
mesh_groups = importToolsFem.get_FemMeshObjectMeshGroups(obj)
if mesh_groups is not ():
# if there are groups found, make task panel available if GuiUp
if FreeCAD.GuiUp == 1:
panel = WriteXDMFTaskPanel(obj, fileString)
FreeCADGui.Control.showDialog(panel)
else:
# create default dict if groupdict_nogui is not None
if group_values_dict_nogui is None:
group_values_dict_nogui = dict([(g, (1, 0))
for g in mesh_groups])
writeFenicsXDMF.write_fenics_mesh_xdmf(
obj, fileString,
group_values_dict=group_values_dict_nogui)
else:
writeFenicsXDMF.write_fenics_mesh_xdmf(obj, fileString)
# ********* module specific methods *********
def import_fenics_mesh(filename, analysis=None):
'''insert a FreeCAD FEM Mesh object in the ActiveDocument
'''
mesh_data = readFenicsXML.read_fenics_mesh_xml(filename)
# xdmf not operational
mesh_name = os.path.basename(os.path.splitext(filename)[0])
femmesh = importToolsFem.make_femmesh(mesh_data)
if femmesh:
mesh_object = FreeCAD.ActiveDocument.addObject('Fem::FemMeshObject', mesh_name)
mesh_object.FemMesh = femmesh