mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
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70 lines
2.9 KiB
C++
70 lines
2.9 KiB
C++
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/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell 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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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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#include <gp_Pnt.hxx>
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#include <gp_Dir.hxx>
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#include <gp_Pnt2d.hxx>
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#include <gp_Dir2d.hxx>
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#include <gp_Trsf2d.hxx>
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#include <gp_Ax2d.hxx>
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#include "../ifcgeom/IfcGeom.h"
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#define Kernel MAKE_TYPE_NAME(Kernel)
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bool IfcGeom::Kernel::convert(const IfcSchema::IfcCartesianTransformationOperator2D* l, gp_Trsf2d& trsf) {
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IN_CACHE(IfcCartesianTransformationOperator2D,l,gp_Trsf2d,trsf)
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gp_Pnt origin;
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gp_Dir axis1 (1.,0.,0.);
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gp_Dir axis2 (0.,1.,0.);
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IfcGeom::Kernel::convert(l->LocalOrigin(),origin);
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if ( l->Axis1() ) IfcGeom::Kernel::convert(l->Axis1(),axis1);
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if ( l->Axis2() ) IfcGeom::Kernel::convert(l->Axis2(),axis2);
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const gp_Pnt2d origin2d(origin.X(), origin.Y());
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const gp_Dir2d axis12d(axis1.X(), axis1.Y());
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const gp_Dir2d axis22d(axis2.X(), axis2.Y());
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// A better match to represent the IfcCartesianTransformationOperator2D would
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// be the gp_Ax22d, but to my knowledge no easy way exists to convert it into
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// a gp_Trsf2d. Easiest would probably be to simply update the underlying
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// gp_Mat2d directly.
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const gp_Ax2d ax2d (origin2d, axis12d);
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trsf.SetTransformation(ax2d);
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if ( ax2d.Direction().Rotated(M_PI / 2.).Dot(axis22d) < 0. ) {
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gp_Trsf2d mirror; mirror.SetMirror(ax2d);
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trsf.Multiply(mirror);
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}
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trsf.Invert();
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if (l->Scale() && !ALMOST_THE_SAME(*l->Scale(), 1.)) {
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trsf.SetScaleFactor(*l->Scale());
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}
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if (is_identity(trsf, getValue(GV_PRECISION))) {
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trsf = gp_Trsf2d();
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}
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CACHE(IfcCartesianTransformationOperator2D,l,trsf)
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return true;
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}
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