1 // Created on: 1993-12-15
2 // Created by: Christophe MARION
3 // Copyright (c) 1993-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #include <BRepExtrema_ExtCF.hxx>
19 #include <BRep_Tool.hxx>
20 #include <BRepTools.hxx>
21 #include <Geom_Curve.hxx>
22 #include <BRepClass_FaceClassifier.hxx>
23 #include <gp_Pnt2d.hxx>
24 #include <BRepAdaptor_Surface.hxx>
25 #include <BRepAdaptor_HSurface.hxx>
26 #include <BRepAdaptor_Curve.hxx>
27 #include <BRepAdaptor_HCurve.hxx>
29 //=======================================================================
30 //function : BRepExtrema_ExtCF
32 //=======================================================================
34 BRepExtrema_ExtCF::BRepExtrema_ExtCF(const TopoDS_Edge& E, const TopoDS_Face& F)
40 //=======================================================================
41 //function : Initialize
43 //=======================================================================
45 void BRepExtrema_ExtCF::Initialize(const TopoDS_Edge& E, const TopoDS_Face& F)
47 BRepAdaptor_Surface Surf(F);
48 BRepAdaptor_Curve aC(E);
49 myHS = new BRepAdaptor_HSurface(Surf);
50 Standard_Real aTolC, aTolS;
52 aTolS = Min(BRep_Tool::Tolerance(F), Precision::Confusion());
53 aTolS = Min(Surf.UResolution(aTolS), Surf.VResolution(aTolS));
54 aTolS = Max(aTolS, Precision::PConfusion());
56 aTolC = Min(BRep_Tool::Tolerance(E), Precision::Confusion());
57 aTolC = aC.Resolution(aTolC);
58 aTolC = Max(aTolC, Precision::PConfusion());
60 Standard_Real U1, U2, V1, V2;
61 BRepTools::UVBounds(F, U1, U2, V1, V2);
62 myExtCS.Initialize(myHS->Surface(), U1, U2, V1, V2, aTolC, aTolS);
65 //=======================================================================
68 //=======================================================================
70 void BRepExtrema_ExtCF::Perform(const TopoDS_Edge& E, const TopoDS_Face& F2)
77 BRep_Tool::Range(E, U1, U2);
79 BRepAdaptor_Curve Curv(E);
80 Handle(BRepAdaptor_HCurve) HC = new BRepAdaptor_HCurve(Curv);
81 myExtCS.Perform(HC->Curve(), U1, U2);
86 if (myExtCS.IsParallel())
87 mySqDist.Append(myExtCS.SquareDistance(1));
90 // Exploration of points and classification
91 BRepClass_FaceClassifier classifier;
92 const Standard_Real Tol = BRep_Tool::Tolerance(F2);
96 for (Standard_Integer i = 1; i <= myExtCS.NbExt(); i++)
98 myExtCS.Points(i, P1, P2);
100 const gp_Pnt2d Puv(U1, U2);
101 classifier.Perform(F2, Puv, Tol);
102 const TopAbs_State state = classifier.State();
103 if (state == TopAbs_ON || state == TopAbs_IN)
105 mySqDist.Append(myExtCS.SquareDistance(i));
106 myPointsOnC.Append(P1);
107 myPointsOnS.Append(P2);