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973c2be1e1
The copying permission statements at the beginning of source files updated to refer to LGPL. Copyright dates extended till 2014 in advance.
110 lines
3.5 KiB
C++
110 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
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// under the terms of the GNU Lesser General Public 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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// modified by mps (juillet 96 ): on utilise BRepAdaptor a la place de
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// GeomAdaptor dans Initialize et Perform.
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#include <BRepExtrema_ExtFF.hxx>
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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 <BRepClass_FaceClassifier.hxx>
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#include <gp_Pnt2d.hxx>
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#include <Precision.hxx>
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#include <BRepAdaptor_HSurface.hxx>
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//=======================================================================
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//function : BRepExtrema_ExtFF
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//purpose :
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//=======================================================================
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BRepExtrema_ExtFF::BRepExtrema_ExtFF(const TopoDS_Face& F1, const TopoDS_Face& F2)
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{
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Initialize(F2);
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Perform(F1,F2);
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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_ExtFF::Initialize(const TopoDS_Face& F2)
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{
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BRepAdaptor_Surface Surf(F2);
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myHS = new BRepAdaptor_HSurface(Surf);
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const Standard_Real Tol = BRep_Tool::Tolerance(F2);
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Standard_Real U1, U2, V1, V2;
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BRepTools::UVBounds(F2, U1, U2, V1, V2);
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myExtSS.Initialize(myHS->Surface(), U1, U2, V1, V2, Tol);
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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_ExtFF::Perform(const TopoDS_Face& F1, const TopoDS_Face& F2)
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{
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mySqDist.Clear();
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myPointsOnS1.Clear();
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myPointsOnS2.Clear();
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BRepAdaptor_Surface Surf1(F1);
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Handle(BRepAdaptor_HSurface) HS1 = new BRepAdaptor_HSurface(Surf1);
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const Standard_Real Tol1 = BRep_Tool::Tolerance(F1);
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Standard_Real U1, U2, V1, V2;
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BRepTools::UVBounds(F1, U1, U2, V1, V2);
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myExtSS.Perform(HS1->Surface(), U1, U2, V1, V2, Tol1);
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if (!myExtSS.IsDone())
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return;
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if (myExtSS.IsParallel())
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mySqDist.Append(myExtSS.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 Tol2 = BRep_Tool::Tolerance(F2);
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Extrema_POnSurf P1, P2;
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Standard_Integer i;
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for (i = 1; i <= myExtSS.NbExt(); i++)
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{
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myExtSS.Points(i, P1, P2);
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P1.Parameter(U1, U2);
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const gp_Pnt2d Puv1(U1, U2);
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classifier.Perform(F1, Puv1, Tol1);
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const TopAbs_State state1 = classifier.State();
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if (state1 == TopAbs_ON || state1 == TopAbs_IN)
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{
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P2.Parameter(U1, U2);
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const gp_Pnt2d Puv2(U1, U2);
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classifier.Perform(F2, Puv2, Tol2);
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const TopAbs_State state2 = classifier.State();
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if (state2 == TopAbs_ON || state2 == TopAbs_IN)
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{
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mySqDist.Append(myExtSS.SquareDistance(i));
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myPointsOnS1.Append(P1);
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myPointsOnS2.Append(P2);
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}
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}
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}
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}
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}
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