| # *************************************************************************** | |
| # * Copyright (c) 2020 Bernd Hahnebach <bernd@bimstatik.org> * | |
| # * * | |
| # * This file is part of the FreeCAD CAx development system. * | |
| # * * | |
| # * 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 * | |
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| # * * | |
| # *************************************************************************** | |
| __title__ = "FreeCAD FEM constant vacuum permittivity object" | |
| __author__ = "Bernd Hahnebach" | |
| __url__ = "https://www.freecad.org" | |
| ## @package constant_vacuumpermittivity | |
| # \ingroup FEM | |
| # \brief FreeCAD FEM constant vacuum permittivity object | |
| from FreeCAD import Units | |
| from femtools import constants | |
| from . import base_fempythonobject | |
| class ConstantVacuumPermittivity(base_fempythonobject.BaseFemPythonObject): | |
| Type = "Fem::ConstantVacuumPermittivity" | |
| def __init__(self, obj): | |
| super().__init__(obj) | |
| obj.addProperty( | |
| "App::PropertyVacuumPermittivity", | |
| "VacuumPermittivity", | |
| "Constants", | |
| "Overwrites default permittivity of vacuum", | |
| ) | |
| obj.setPropertyStatus("VacuumPermittivity", "LockDynamic") | |
| # we must set an expression so that the small value can actually be entered | |
| permittivity = Units.Quantity(constants.vacuum_permittivity()).getValueAs("F/m") | |
| obj.setExpression("VacuumPermittivity", str(permittivity)) | |