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https://git.dev.opencascade.org/repos/occt.git
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d51e34f96f
Added the function Tolerance2d(). Now 2d-tolerance is used instead of 3d-tolerance where it's necessary.
111 lines
3.9 KiB
C++
111 lines
3.9 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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// 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 <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_Surface.hxx>
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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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void BRepExtrema_ExtFF::Initialize(const TopoDS_Face& F2)
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{
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BRepAdaptor_Surface Surf(F2);
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if (Surf.GetType() == GeomAbs_OtherSurface)
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return; // protect against non-geometric type (e.g. triangulation)
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myHS = new BRepAdaptor_Surface(Surf);
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Standard_Real Tol = Min(BRep_Tool::Tolerance(F2), Precision::Confusion());
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Tol = Min(Surf.UResolution(Tol), Surf.VResolution(Tol));
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Tol = Max(Tol, Precision::PConfusion());
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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, U1, U2, V1, V2, Tol);
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}
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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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if (myHS.IsNull() || Surf1.GetType() == GeomAbs_OtherSurface)
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return; // protect against non-geometric type (e.g. triangulation)
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Handle(BRepAdaptor_Surface) HS1 = new BRepAdaptor_Surface(Surf1);
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Standard_Real Tol1 = Min(BRep_Tool::Tolerance(F1), Precision::Confusion());
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Tol1 = Min(Surf1.UResolution(Tol1), Surf1.VResolution(Tol1));
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Tol1 = Max(Tol1, Precision::PConfusion());
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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, 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 Tol2d2 = BRep_Tool::Tolerance2d(F2, 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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const Standard_Real Tol2d1 = BRep_Tool::Tolerance2d(F1, Tol1);
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classifier.Perform(F1, Puv1, Tol2d1);
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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, Tol2d2);
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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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