99 lines
4.1 KiB
C++
99 lines
4.1 KiB
C++
/***************************************************************************
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* Copyright (c) 2013 Jan Rheinländer <jrheinlaender[at]users.sourceforge.net> *
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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 library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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* This library 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 library; see the file COPYING.LIB. If not, *
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* write to the Free Software Foundation, Inc., 59 Temple Place, *
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* Suite 330, Boston, MA 02111-1307, USA *
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* *
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***************************************************************************/
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#include "PreCompiled.h"
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#ifndef _PreComp_
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#include <gp_Pnt.hxx>
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#include <gp_Pln.hxx>
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#include <gp_Lin.hxx>
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#include <TopoDS.hxx>
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#include <BRepAdaptor_Surface.hxx>
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#include <BRepAdaptor_Curve.hxx>
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#include <Precision.hxx>
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#endif
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#include "FemConstraintPulley.h"
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#include <Mod/Part/App/PartFeature.h>
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#include <Base/Console.h>
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using namespace Fem;
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PROPERTY_SOURCE(Fem::ConstraintPulley, Fem::ConstraintGear);
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ConstraintPulley::ConstraintPulley()
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{
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ADD_PROPERTY(OtherDiameter,(100.0));
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ADD_PROPERTY(CenterDistance,(500.0));
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ADD_PROPERTY(IsDriven,(0));
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ADD_PROPERTY(TensionForce,(0.0));
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ADD_PROPERTY_TYPE(BeltAngle,(0),"ConstraintPulley",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),
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"Angle of belt forces");
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ADD_PROPERTY_TYPE(BeltForce1,(0.0),"ConstraintPulley",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),
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"First belt force");
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ADD_PROPERTY_TYPE(BeltForce2,(0.0),"ConstraintPulley",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),
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"Second belt force");
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ForceAngle.setValue(00.0);
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Diameter.setValue(300.0);
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// calculate initial values of read-only properties
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onChanged(&Force);
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}
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App::DocumentObjectExecReturn *ConstraintPulley::execute(void)
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{
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return ConstraintBearing::execute();
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}
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void ConstraintPulley::onChanged(const App::Property* prop)
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{
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ConstraintGear::onChanged(prop);
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if ((prop == &Diameter) || (prop == &OtherDiameter) || (prop == &CenterDistance)) {
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if (CenterDistance.getValue() > Precision::Confusion()) {
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BeltAngle.setValue(asin((Diameter.getValue() - OtherDiameter.getValue())/2/CenterDistance.getValue()));
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BeltAngle.touch();
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}
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} else if ((prop == &Force) || (prop == &TensionForce) || (prop == &IsDriven)) {
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double radius = Diameter.getValue() / 2.0;
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if (radius < Precision::Confusion())
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return;
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double force = Force.getValue() / (radius/1000);
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if (fabs(force) < Precision::Confusion())
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return;
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bool neg = (force < 0.0);
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if (neg)
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force *= -1.0;
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if ((IsDriven.getValue() && neg) || (!IsDriven.getValue() && !neg)) {
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BeltForce1.setValue(force + TensionForce.getValue());
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BeltForce2.setValue(TensionForce.getValue());
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} else {
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BeltForce2.setValue(force + TensionForce.getValue());
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BeltForce1.setValue(TensionForce.getValue());
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}
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BeltForce1.touch();
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}
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}
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