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112 lines
3.5 KiB
C++
112 lines
3.5 KiB
C++
// Created on: 1993-12-15
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// Created by: Christophe MARION
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// Copyright (c) 1993-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#include <BRepExtrema_ExtCF.hxx>
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#include <BRep_Tool.hxx>
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#include <BRepTools.hxx>
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#include <Geom_Curve.hxx>
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#include <BRepClass_FaceClassifier.hxx>
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#include <gp_Pnt2d.hxx>
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#include <BRepAdaptor_Surface.hxx>
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#include <BRepAdaptor_HSurface.hxx>
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#include <BRepAdaptor_Curve.hxx>
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#include <BRepAdaptor_HCurve.hxx>
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//=======================================================================
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//function : BRepExtrema_ExtCF
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//purpose :
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//=======================================================================
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BRepExtrema_ExtCF::BRepExtrema_ExtCF(const TopoDS_Edge& E, const TopoDS_Face& F)
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{
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Initialize(E, F);
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Perform(E, F);
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}
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//=======================================================================
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//function : Initialize
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//purpose :
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//=======================================================================
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void BRepExtrema_ExtCF::Initialize(const TopoDS_Edge& E, const TopoDS_Face& F)
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{
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BRepAdaptor_Surface Surf(F);
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BRepAdaptor_Curve aC(E);
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myHS = new BRepAdaptor_HSurface(Surf);
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Standard_Real aTolC, aTolS;
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//
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aTolS = Min(BRep_Tool::Tolerance(F), Precision::Confusion());
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aTolS = Min(Surf.UResolution(aTolS), Surf.VResolution(aTolS));
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aTolS = Max(aTolS, Precision::PConfusion());
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//
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aTolC = Min(BRep_Tool::Tolerance(E), Precision::Confusion());
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aTolC = aC.Resolution(aTolC);
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aTolC = Max(aTolC, Precision::PConfusion());
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//
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Standard_Real U1, U2, V1, V2;
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BRepTools::UVBounds(F, U1, U2, V1, V2);
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myExtCS.Initialize(myHS->Surface(), U1, U2, V1, V2, aTolC, aTolS);
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}
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//=======================================================================
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//function : Perform
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//purpose :
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//=======================================================================
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void BRepExtrema_ExtCF::Perform(const TopoDS_Edge& E, const TopoDS_Face& F2)
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{
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mySqDist.Clear();
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myPointsOnS.Clear();
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myPointsOnC.Clear();
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Standard_Real U1, U2;
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BRep_Tool::Range(E, U1, U2);
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BRepAdaptor_Curve Curv(E);
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Handle(BRepAdaptor_HCurve) HC = new BRepAdaptor_HCurve(Curv);
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myExtCS.Perform(HC->Curve(), U1, U2);
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if(!myExtCS.IsDone())
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return;
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if (myExtCS.IsParallel())
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mySqDist.Append(myExtCS.SquareDistance(1));
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else
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{
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// Exploration of points and classification
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BRepClass_FaceClassifier classifier;
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const Standard_Real Tol = BRep_Tool::Tolerance(F2);
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Extrema_POnCurv P1;
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Extrema_POnSurf P2;
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for (Standard_Integer i = 1; i <= myExtCS.NbExt(); i++)
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{
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myExtCS.Points(i, P1, P2);
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P2.Parameter(U1, U2);
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const gp_Pnt2d Puv(U1, U2);
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classifier.Perform(F2, Puv, Tol);
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const TopAbs_State state = classifier.State();
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if (state == TopAbs_ON || state == TopAbs_IN)
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{
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mySqDist.Append(myExtCS.SquareDistance(i));
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myPointsOnC.Append(P1);
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myPointsOnS.Append(P2);
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}
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}
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}
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}
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