FreeCAD

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/***************************************************************************
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 *   Copyright (c) 2013 Jan Rheinländer                                    *
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 *                                <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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#include "DatumFeature.h"
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#include "OCCError.h"
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#include "PartPyCXX.h"
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using namespace Part;
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using namespace Attacher;
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PROPERTY_SOURCE_ABSTRACT_WITH_EXTENSIONS(Part::Datum, Part::Feature)
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Datum::Datum()
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{
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    AttachExtension::initExtension(this);
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    touch();
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}
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Datum::~Datum() = default;
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void Datum::onDocumentRestored()
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{
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    // This seems to be the only way to make the ViewProvider display the datum feature
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    AttachmentSupport.touch();
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    Part::Feature::onDocumentRestored();
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}
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TopoDS_Shape Datum::getShape() const
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{
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    Part::TopoShape sh = Shape.getShape();
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    sh.setPlacement(Placement.getValue());
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    return sh.getShape();
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}
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App::DocumentObject *Datum::getSubObject(const char *subname,
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        PyObject **pyObj, Base::Matrix4D *pmat, bool transform, int depth) const
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{
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    // For the sake of simplicity, we don't bother to check for subname, just
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    // return the shape as it is, because a datum object only holds shape with
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    // one single geometry element.
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    (void)subname;
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    (void)depth;
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    if(pmat && transform)
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        *pmat *= Placement.getValue().toMatrix();
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    if(!pyObj)
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        return const_cast<Datum*>(this);
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    Base::PyGILStateLocker lock;
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    PY_TRY {
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        TopoShape ts(getShape().Located(TopLoc_Location()));
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        if(pmat && !ts.isNull())
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            ts.transformShape(*pmat,false,true);
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        *pyObj =  Py::new_reference_to(shape2pyshape(ts.getShape()));
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        return const_cast<Datum*>(this);
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    } PY_CATCH_OCC
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}
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Base::Vector3d Datum::getBasePoint () const {
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    return Placement.getValue().getPosition();
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}
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