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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.
97 lines
3.5 KiB
C++
97 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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// modified by MPS (june 96) : on utilise BRepClass_FaceClassifier seulement
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// si IsDone de Extrema est vrai
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#include <BRepExtrema_ExtPF.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 <BRepAdaptor_Surface.hxx>
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#include <Precision.hxx>
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//=================================================================================================
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BRepExtrema_ExtPF::BRepExtrema_ExtPF(const TopoDS_Vertex& TheVertex,
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const TopoDS_Face& TheFace,
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const Extrema_ExtFlag TheFlag,
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const Extrema_ExtAlgo TheAlgo)
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{
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Initialize(TheFace, TheFlag, TheAlgo);
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Perform(TheVertex, TheFace);
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}
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//=================================================================================================
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void BRepExtrema_ExtPF::Initialize(const TopoDS_Face& TheFace,
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const Extrema_ExtFlag TheFlag,
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const Extrema_ExtAlgo TheAlgo)
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{
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// cette surface doit etre en champ. Extrema ne fait
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// pas de copie et prend seulement un pointeur dessus.
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mySurf.Initialize(TheFace, Standard_False);
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if (mySurf.GetType() == GeomAbs_OtherSurface)
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return; // protect against non-geometric type (e.g. triangulation)
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Standard_Real Tol = Min(BRep_Tool::Tolerance(TheFace), Precision::Confusion());
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Standard_Real aTolU, aTolV;
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aTolU = Max(mySurf.UResolution(Tol), Precision::PConfusion());
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aTolV = Max(mySurf.VResolution(Tol), Precision::PConfusion());
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Standard_Real U1, U2, V1, V2;
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BRepTools::UVBounds(TheFace, U1, U2, V1, V2);
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myExtPS.SetFlag(TheFlag);
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myExtPS.SetAlgo(TheAlgo);
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myExtPS.Initialize(mySurf, U1, U2, V1, V2, aTolU, aTolV);
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}
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//=================================================================================================
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void BRepExtrema_ExtPF::Perform(const TopoDS_Vertex& TheVertex, const TopoDS_Face& TheFace)
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{
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mySqDist.Clear();
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myPoints.Clear();
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const gp_Pnt P = BRep_Tool::Pnt(TheVertex);
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if (mySurf.GetType() == GeomAbs_OtherSurface)
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return; // protect against non-geometric type (e.g. triangulation)
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myExtPS.Perform(P);
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// Exploration of points and classification
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if (myExtPS.IsDone())
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{
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BRepClass_FaceClassifier classifier;
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Standard_Real U1, U2;
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const Standard_Real Tol2d = BRep_Tool::Tolerance2d(TheFace, BRep_Tool::Tolerance(TheFace));
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for (Standard_Integer i = 1; i <= myExtPS.NbExt(); i++)
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{
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myExtPS.Point(i).Parameter(U1, U2);
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const gp_Pnt2d Puv(U1, U2);
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classifier.Perform(TheFace, Puv, Tol2d);
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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(myExtPS.SquareDistance(i));
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myPoints.Append(myExtPS.Point(i));
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}
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}
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}
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}
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