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0a807dd9a3
When making pcurve for edge on face make sure that the produced 2D curve will have the same range as 3D curve of the edge.
710 lines
22 KiB
C++
710 lines
22 KiB
C++
// Created by: Peter KURNEV
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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 <BOPTools_AlgoTools2D.hxx>
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#include <BRep_Builder.hxx>
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#include <BRep_CurveRepresentation.hxx>
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#include <BRep_GCurve.hxx>
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#include <BRep_ListIteratorOfListOfCurveRepresentation.hxx>
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#include <BRep_TEdge.hxx>
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#include <BRep_Tool.hxx>
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#include <BRepAdaptor_Curve.hxx>
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#include <BRepAdaptor_HSurface.hxx>
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#include <BRepAdaptor_Surface.hxx>
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#include <BRepClass_FaceClassifier.hxx>
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#include <BRepTools.hxx>
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#include <Geom2d_BSplineCurve.hxx>
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#include <Geom2d_Circle.hxx>
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#include <Geom2d_Curve.hxx>
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#include <Geom2d_Ellipse.hxx>
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#include <Geom2d_Hyperbola.hxx>
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#include <Geom2d_Line.hxx>
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#include <Geom2d_Parabola.hxx>
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#include <Geom2d_TrimmedCurve.hxx>
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#include <Geom2dAdaptor.hxx>
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#include <Geom_Curve.hxx>
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#include <Geom_Plane.hxx>
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#include <Geom_RectangularTrimmedSurface.hxx>
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#include <Geom_Surface.hxx>
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#include <Geom_TrimmedCurve.hxx>
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#include <GeomAdaptor_Curve.hxx>
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#include <GeomAdaptor_HCurve.hxx>
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#include <GeomAdaptor_HSurface.hxx>
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#include <GeomAdaptor_Surface.hxx>
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#include <GeomInt.hxx>
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#include <GeomLib.hxx>
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#include <GeomProjLib.hxx>
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#include <gp.hxx>
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#include <gp_Cylinder.hxx>
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#include <gp_Pnt.hxx>
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#include <gp_Pnt2d.hxx>
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#include <gp_Vec.hxx>
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#include <gp_Vec2d.hxx>
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#include <IntTools_Context.hxx>
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#include <IntTools_Tools.hxx>
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#include <Precision.hxx>
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#include <ProjLib_ProjectedCurve.hxx>
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#include <ProjLib.hxx>
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#include <Standard_ConstructionError.hxx>
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#include <Standard_NotImplemented.hxx>
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#include <TopExp.hxx>
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#include <TopExp_Explorer.hxx>
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#include <TopLoc_Location.hxx>
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#include <TopoDS_Edge.hxx>
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#include <TopoDS_Face.hxx>
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static
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Standard_Real MaxToleranceEdge (const TopoDS_Face& );
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//=======================================================================
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//function : BuildPCurveForEdgeOnFace
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//purpose :
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//=======================================================================
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void BOPTools_AlgoTools2D::BuildPCurveForEdgeOnFace (const TopoDS_Edge& aE,
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const TopoDS_Face& aF,
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const Handle(IntTools_Context)& theContext)
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{
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BRep_Builder aBB;
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Handle(Geom2d_Curve) aC2D;
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Standard_Real aTolPC, aTolFact, aTolEdge, aFirst, aLast;
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Standard_Boolean aHasOld;
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aHasOld=BOPTools_AlgoTools2D::HasCurveOnSurface (aE, aF, aC2D,
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aFirst, aLast,
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aTolEdge);
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if (aHasOld) {
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return;
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}
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BOPTools_AlgoTools2D::CurveOnSurface(aE, aF, aC2D, aTolPC, theContext);
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aTolEdge=BRep_Tool::Tolerance(aE);
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aTolFact=Max(aTolEdge, aTolPC);
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aBB.UpdateEdge(aE, aC2D, aF, aTolFact);
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return;
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}
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//=======================================================================
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//function : EdgeTangent
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//purpose :
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//=======================================================================
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Standard_Boolean BOPTools_AlgoTools2D::EdgeTangent
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(const TopoDS_Edge& anEdge,
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const Standard_Real aT,
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gp_Vec& aTau)
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{
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Standard_Boolean isdgE;
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Standard_Real first, last;
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isdgE = BRep_Tool::Degenerated(anEdge);
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if (isdgE) {
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return Standard_False;
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}
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Handle(Geom_Curve) aC=BRep_Tool::Curve(anEdge, first, last);
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gp_Pnt aP;
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aC->D1(aT, aP, aTau);
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Standard_Real mod = aTau.Magnitude();
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if(mod > gp::Resolution()) {
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aTau /= mod;
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}
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else {
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return Standard_False;
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}
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//aTau.Normalize();
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if (anEdge.Orientation() == TopAbs_REVERSED){
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aTau.Reverse();
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}
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return Standard_True;
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}
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//=======================================================================
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//function : PointOnOnSurface
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//purpose :
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//=======================================================================
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void BOPTools_AlgoTools2D::PointOnSurface (const TopoDS_Edge& aE,
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const TopoDS_Face& aF,
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const Standard_Real aParameter,
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Standard_Real& U,
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Standard_Real& V,
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const Handle(IntTools_Context)& theContext)
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{
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gp_Pnt2d aP2D;
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Handle(Geom2d_Curve) aC2D;
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Standard_Real aToler, aFirst, aLast;
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BOPTools_AlgoTools2D::CurveOnSurface (aE, aF, aC2D, aFirst, aLast, aToler, theContext);
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aC2D->D0(aParameter, aP2D);
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U=aP2D.X();
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V=aP2D.Y();
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return;
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}
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//=======================================================================
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//function : CurveOnSurface
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//purpose :
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//=======================================================================
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void BOPTools_AlgoTools2D::CurveOnSurface (const TopoDS_Edge& aE,
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const TopoDS_Face& aF,
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Handle(Geom2d_Curve)& aC2D,
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Standard_Real& aToler,
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const Handle(IntTools_Context)& theContext)
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{
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Standard_Real aFirst, aLast;
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//
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BOPTools_AlgoTools2D::CurveOnSurface(aE, aF, aC2D, aFirst, aLast, aToler, theContext);
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//
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return;
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}
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//=======================================================================
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//function : CurveOnSurface
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//purpose :
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//=======================================================================
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void BOPTools_AlgoTools2D::CurveOnSurface (const TopoDS_Edge& aE,
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const TopoDS_Face& aF,
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Handle(Geom2d_Curve)& aC2D,
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Standard_Real& aFirst,
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Standard_Real& aLast,
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Standard_Real& aToler,
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const Handle(IntTools_Context)& theContext)
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{
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Standard_Boolean aHasOld;
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Handle(Geom2d_Curve) C2D;
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aHasOld=BOPTools_AlgoTools2D::HasCurveOnSurface (aE, aF, C2D,
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aFirst, aLast,
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aToler);
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if (aHasOld) {
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aC2D=C2D;
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return;
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}
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BOPTools_AlgoTools2D::Make2D(aE, aF, C2D, aFirst, aLast, aToler, theContext);
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aC2D=C2D;
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return;
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}
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//=======================================================================
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//function : HasCurveOnSurface
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//purpose :
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//=======================================================================
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Standard_Boolean BOPTools_AlgoTools2D::HasCurveOnSurface
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(const TopoDS_Edge& aE,
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const TopoDS_Face& aF,
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Handle(Geom2d_Curve)& aC2D,
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Standard_Real& aFirst,
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Standard_Real& aLast,
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Standard_Real& aToler)
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{
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Standard_Boolean aHasOld;
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aToler=BRep_Tool::Tolerance(aE);
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BRep_Tool::Range(aE, aFirst, aLast);
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if((aLast - aFirst) < Precision::PConfusion()) {
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return Standard_False;
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}
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aC2D=BRep_Tool::CurveOnSurface(aE, aF, aFirst, aLast);
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aHasOld=!aC2D.IsNull();
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return aHasOld;
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}
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//=======================================================================
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//function : HasCurveOnSurface
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//purpose :
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//=======================================================================
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Standard_Boolean BOPTools_AlgoTools2D::HasCurveOnSurface
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(const TopoDS_Edge& aE,
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const TopoDS_Face& aF)
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{
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Standard_Boolean bHasOld;
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Handle(Geom2d_Curve) aC2D;
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Standard_Real aFirst, aLast;
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//
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BRep_Tool::Range(aE, aFirst, aLast);
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//
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if((aLast - aFirst) < Precision::PConfusion()) {
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return Standard_False;
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}
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//
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aC2D=BRep_Tool::CurveOnSurface(aE, aF, aFirst, aLast);
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bHasOld=!aC2D.IsNull();
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//
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return bHasOld;
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}
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//=======================================================================
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//function : AdjustPCurveOnFace
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//purpose :
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//=======================================================================
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void BOPTools_AlgoTools2D::AdjustPCurveOnFace
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(const TopoDS_Face& theF,
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const Handle(Geom_Curve)& theC3D,
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const Handle(Geom2d_Curve)& theC2D,
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Handle(Geom2d_Curve)& theC2DA,
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const Handle(IntTools_Context)& theContext)
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{
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Standard_Real aT1 = theC3D->FirstParameter();
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Standard_Real aT2 = theC3D->LastParameter();
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//
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BOPTools_AlgoTools2D::AdjustPCurveOnFace (theF, aT1, aT2, theC2D, theC2DA, theContext);
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}
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//=======================================================================
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//function : AdjustPCurveOnFace
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//purpose :
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//=======================================================================
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void BOPTools_AlgoTools2D::AdjustPCurveOnFace
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(const TopoDS_Face& theF,
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const Standard_Real theFirst,
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const Standard_Real theLast,
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const Handle(Geom2d_Curve)& theC2D,
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Handle(Geom2d_Curve)& theC2DA,
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const Handle(IntTools_Context)& theContext)
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{
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BRepAdaptor_Surface aBASTmp;
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const BRepAdaptor_Surface* pBAS;
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if (!theContext.IsNull()) {
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pBAS = &theContext->SurfaceAdaptor(theF);
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}
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else {
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aBASTmp.Initialize(theF, Standard_True);
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pBAS = &aBASTmp;
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}
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//
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BOPTools_AlgoTools2D::AdjustPCurveOnSurf(*pBAS, theFirst, theLast, theC2D, theC2DA);
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}
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//=======================================================================
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//function : AdjustPCurveOnFace
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//purpose :
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//=======================================================================
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void BOPTools_AlgoTools2D::AdjustPCurveOnSurf
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(const BRepAdaptor_Surface& aBAS,
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const Standard_Real aFirst,
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const Standard_Real aLast,
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const Handle(Geom2d_Curve)& aC2D,
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Handle(Geom2d_Curve)& aC2DA)
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{
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Standard_Boolean mincond, maxcond;
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Standard_Real UMin, UMax, VMin, VMax, aT, u2, v2, du, dv, aDelta;
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Standard_Real aUPeriod;
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//
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const TopoDS_Face& aF=aBAS.Face();
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UMin=aBAS.FirstUParameter();
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UMax=aBAS.LastUParameter();
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VMin=aBAS.FirstVParameter();
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VMax=aBAS.LastVParameter();
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//
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aDelta=Precision::PConfusion();
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aT =.5*(aFirst+aLast);
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gp_Pnt2d pC2D;
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aC2D->D0(aT, pC2D);
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u2 = pC2D.X();
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v2 = pC2D.Y();
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//
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// du
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du = 0.;
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if (aBAS.IsUPeriodic()) {
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aUPeriod = aBAS.UPeriod();
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//
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// a. try to clarify u2 using the precision (aDelta)
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if (fabs(u2-UMin) < aDelta) {
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u2=UMin;
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}
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else if (fabs(u2-UMin-aUPeriod) < aDelta) {
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u2=UMin+aUPeriod;
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}
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// b. compute du again using clarified value of u2
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GeomInt::AdjustPeriodic(u2, UMin, UMax, aUPeriod, u2, du, 0.);
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//
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if (du==0.) {
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if (aBAS.GetType()==GeomAbs_Cylinder) {
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Standard_Real aR, dFi, aTol;
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//
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gp_Cylinder aCylinder=aBAS.Cylinder();
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aR=aCylinder.Radius();
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aTol=MaxToleranceEdge(aF);
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dFi=aTol/aR;
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if (dFi<aDelta) {
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dFi=aDelta;
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}
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//
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mincond = (UMin - u2 > dFi);
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maxcond = (u2 - UMax > dFi);
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if (mincond || maxcond) {
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du = ( mincond ) ? aUPeriod : -aUPeriod;
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}
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}
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}
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}
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// dv
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dv = 0.;
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if (aBAS.IsVPeriodic()) {
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Standard_Real aVPeriod, aVm, aVr, aVmid, dVm, dVr;
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//
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aVPeriod = aBAS.VPeriod();
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mincond = (VMin - v2 > aDelta);
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maxcond = (v2 - VMax > aDelta);
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//
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if (mincond || maxcond) {
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dv = ( mincond ) ? aVPeriod : -aVPeriod;
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}
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//
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if ((VMax-VMin<aVPeriod) && dv) {
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aVm=v2;
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aVr=v2+dv;
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aVmid=0.5*(VMin+VMax);
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dVm=fabs(aVm-aVmid);
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dVr=fabs(aVr-aVmid);
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if (dVm<dVr) {
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dv=0.;
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}
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}
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}
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//
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{
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//check the point with classifier
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Standard_Real u,v;
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u = u2 + du;
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v = v2 + dv;
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if (aBAS.IsUPeriodic()) {
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aUPeriod = aBAS.UPeriod();
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if ((UMax - UMin - 2*aDelta) > aUPeriod) {
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if ((u > (UMin + aDelta + aUPeriod)) ||
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(u < (UMax - aDelta - aUPeriod))) {
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BRepClass_FaceClassifier aClassifier;
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aClassifier.Perform(aF, gp_Pnt2d(u, v), aDelta);
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TopAbs_State Status = aClassifier.State();
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if (Status == TopAbs_OUT) {
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du += (u > (UMin + aDelta + aUPeriod)) ? -aUPeriod : aUPeriod;
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}
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}
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}
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}
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//
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u = u2 + du;
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if (aBAS.IsVPeriodic()) {
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Standard_Real aVPeriod = aBAS.VPeriod();
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if ((VMax - VMin - 2*aDelta) > aVPeriod) {
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if ((v > (VMin + aDelta + aVPeriod)) ||
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(v < (VMax - aDelta - aVPeriod))) {
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BRepClass_FaceClassifier aClassifier;
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aClassifier.Perform(aF, gp_Pnt2d(u, v), aDelta);
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TopAbs_State Status = aClassifier.State();
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if (Status == TopAbs_OUT) {
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dv += (v > (VMin + aDelta + aVPeriod)) ? -aVPeriod : aVPeriod;
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}
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}
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}
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}
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}
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// Translation if necessary
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Handle(Geom2d_Curve) aC2Dx=aC2D;
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if ( du != 0. || dv != 0.) {
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Handle(Geom2d_Curve) PCT = Handle(Geom2d_Curve)::DownCast(aC2Dx->Copy());
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gp_Vec2d aV2D(du,dv);
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PCT->Translate(aV2D);
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aC2Dx = PCT;
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}
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aC2DA=aC2Dx;
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}
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//=======================================================================
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//function : IntermediatePoint
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//purpose :
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//=======================================================================
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Standard_Real BOPTools_AlgoTools2D::IntermediatePoint
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(const Standard_Real aFirst,
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const Standard_Real aLast)
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{
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//define parameter division number as 10*e^(-PI) = 0.43213918
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const Standard_Real PAR_T = 0.43213918;
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Standard_Real aParm;
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aParm=(1.-PAR_T)*aFirst + PAR_T*aLast;
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return aParm;
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}
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//=======================================================================
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//function : IntermediatePoint
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//purpose :
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//=======================================================================
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Standard_Real BOPTools_AlgoTools2D::IntermediatePoint
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(const TopoDS_Edge& aE)
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{
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Standard_Real aT, aT1, aT2;
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Handle(Geom_Curve)aC1=BRep_Tool::Curve(aE, aT1, aT2);
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if (aC1.IsNull())
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BRep_Tool::Range(aE, aT1, aT2);
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aT=BOPTools_AlgoTools2D::IntermediatePoint(aT1, aT2);
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return aT;
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}
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//=======================================================================
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//function : Make2D
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//purpose :
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//=======================================================================
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void BOPTools_AlgoTools2D::Make2D (const TopoDS_Edge& aE,
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const TopoDS_Face& aF,
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Handle(Geom2d_Curve)& aC2D,
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Standard_Real& aFirst,
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Standard_Real& aLast,
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Standard_Real& aToler,
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const Handle(IntTools_Context)& theContext)
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{
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Standard_Boolean aLocIdentity;
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Standard_Real f3d, l3d;
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TopLoc_Location aLoc;
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Handle(Geom2d_Curve) C2D;
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C2D=BRep_Tool::CurveOnSurface(aE, aF, aFirst, aLast);
|
|
|
|
if (!C2D.IsNull()) {
|
|
aC2D=C2D;
|
|
return;
|
|
}
|
|
|
|
Handle(Geom_Curve) C3D2, C3D;
|
|
C3D = BRep_Tool::Curve(aE, aLoc, f3d, l3d);
|
|
//
|
|
if (C3D.IsNull()) {
|
|
// aE has no 3D curve, so nothing is done
|
|
}
|
|
//
|
|
aLocIdentity=aLoc.IsIdentity();
|
|
|
|
if (aLocIdentity) {
|
|
C3D2 = C3D;
|
|
}
|
|
else {
|
|
C3D2 = Handle(Geom_Curve)::
|
|
DownCast(C3D->Transformed(aLoc.Transformation()));
|
|
}
|
|
|
|
//
|
|
aToler = BRep_Tool::Tolerance(aE);
|
|
BOPTools_AlgoTools2D::MakePCurveOnFace(aF, C3D2, f3d, l3d, aC2D, aToler, theContext);
|
|
//
|
|
aFirst = f3d;
|
|
aLast = l3d;
|
|
}
|
|
|
|
//=======================================================================
|
|
//function : MakePCurveOnFace
|
|
//purpose :
|
|
//=======================================================================
|
|
void BOPTools_AlgoTools2D::MakePCurveOnFace (const TopoDS_Face& aF,
|
|
const Handle(Geom_Curve)& aC3D,
|
|
Handle(Geom2d_Curve)& aC2D, //->
|
|
Standard_Real& TolReached2d,
|
|
const Handle(IntTools_Context)& theContext)
|
|
{
|
|
Standard_Real aFirst, aLast;
|
|
|
|
aFirst = aC3D -> FirstParameter();
|
|
aLast = aC3D -> LastParameter();
|
|
//
|
|
TolReached2d=0.;
|
|
//
|
|
BOPTools_AlgoTools2D::MakePCurveOnFace
|
|
(aF, aC3D, aFirst, aLast, aC2D, TolReached2d, theContext);
|
|
}
|
|
|
|
//=======================================================================
|
|
//function : MakePCurveOnFace
|
|
//purpose :
|
|
//=======================================================================
|
|
void BOPTools_AlgoTools2D::MakePCurveOnFace
|
|
(const TopoDS_Face& aF,
|
|
const Handle(Geom_Curve)& aC3D,
|
|
const Standard_Real aT1,
|
|
const Standard_Real aT2,
|
|
Handle(Geom2d_Curve)& aC2D,
|
|
Standard_Real& TolReached2d,
|
|
const Handle(IntTools_Context)& theContext)
|
|
{
|
|
BRepAdaptor_Surface aBASTmp;
|
|
const BRepAdaptor_Surface* pBAS;
|
|
if (!theContext.IsNull()) {
|
|
pBAS = &theContext->SurfaceAdaptor(aF);
|
|
}
|
|
else {
|
|
aBASTmp.Initialize(aF, Standard_True);
|
|
pBAS = &aBASTmp;
|
|
}
|
|
//
|
|
Handle(BRepAdaptor_HSurface) aBAHS = new BRepAdaptor_HSurface(*pBAS);
|
|
Handle(GeomAdaptor_HCurve) aBAHC = new GeomAdaptor_HCurve(aC3D, aT1, aT2);
|
|
//
|
|
Standard_Real aTolR;
|
|
Standard_Real aTR = Precision::Confusion();//1.e-7;
|
|
Standard_Real aMaxTol = 1.e3 * aTR; //0.0001
|
|
Standard_Boolean isAnaSurf = ProjLib::IsAnaSurf(aBAHS);
|
|
|
|
//when the type of surface is GeomAbs_SurfaceOfRevolution
|
|
if (pBAS->GetType() == GeomAbs_SurfaceOfRevolution)
|
|
{
|
|
if (TolReached2d > aTR) {
|
|
aTR=TolReached2d;
|
|
}
|
|
//
|
|
ProjLib_ProjectedCurve aProj1(aBAHS, aBAHC, aTR);
|
|
ProjLib::MakePCurveOfType(aProj1, aC2D);
|
|
aTolR = aProj1.GetTolerance();
|
|
}
|
|
else
|
|
{
|
|
ProjLib_ProjectedCurve aProjCurv(aBAHS);
|
|
Standard_Integer aDegMin = -1, aDegMax = -1, aMaxSegments = -1;
|
|
Standard_Real aMaxDist = -1;
|
|
AppParCurves_Constraint aBndPnt = AppParCurves_TangencyPoint;
|
|
if ((TolReached2d >= 10. * aTR) && (TolReached2d <= aMaxTol || isAnaSurf))
|
|
{
|
|
aTR = Min(aMaxTol, 0.1*TolReached2d);
|
|
aMaxSegments = 100;
|
|
aMaxDist = 1.e3*TolReached2d;
|
|
if(!isAnaSurf || TolReached2d > 1.)
|
|
{
|
|
aBndPnt = AppParCurves_PassPoint;
|
|
}
|
|
}
|
|
else if(TolReached2d > aMaxTol)
|
|
{
|
|
aTR = Min(TolReached2d, 1.e3 * aMaxTol);
|
|
aMaxDist = 1.e2 * aTR;
|
|
aMaxSegments = 100;
|
|
}
|
|
aProjCurv.Load(aTR);
|
|
aProjCurv.SetDegree(aDegMin, aDegMax);
|
|
aProjCurv.SetMaxSegments(aMaxSegments);
|
|
aProjCurv.SetBndPnt(aBndPnt);
|
|
aProjCurv.SetMaxDist(aMaxDist);
|
|
aProjCurv.Perform(aBAHC);
|
|
ProjLib::MakePCurveOfType(aProjCurv, aC2D);
|
|
aTolR=aProjCurv.GetTolerance();
|
|
}
|
|
//
|
|
if (aC2D.IsNull() && (aTR < aMaxTol || aTR < TolReached2d))
|
|
{
|
|
aTR = Max(TolReached2d, aMaxTol);
|
|
ProjLib_ProjectedCurve aProjCurvAgain(aBAHS, aBAHC, aTR);// 2
|
|
ProjLib::MakePCurveOfType(aProjCurvAgain, aC2D);
|
|
aTolR = aProjCurvAgain.GetTolerance();
|
|
}
|
|
//
|
|
if(aC2D.IsNull())
|
|
{
|
|
throw Standard_ConstructionError("BOPTools_AlgoTools2D::MakePCurveOnFace : PCurve is Null");
|
|
}
|
|
//
|
|
TolReached2d=aTolR;
|
|
|
|
// Adjust curve for periodic surface
|
|
Handle(Geom2d_Curve) aC2DA;
|
|
BOPTools_AlgoTools2D::AdjustPCurveOnSurf (*pBAS, aT1, aT2, aC2D, aC2DA);
|
|
aC2D = aC2DA;
|
|
|
|
// Make sure that the range of the 2D curve is sufficient for representation of the 3D curve.
|
|
Standard_Real aTCFirst = aC2D->FirstParameter();
|
|
Standard_Real aTCLast = aC2D->LastParameter();
|
|
if ((aTCFirst - aT1) > Precision::PConfusion() ||
|
|
(aT2 - aTCLast ) > Precision::PConfusion())
|
|
{
|
|
if (aTCFirst < aT1) aTCFirst = aT1;
|
|
if (aTCLast > aT2) aTCLast = aT2;
|
|
|
|
GeomLib::SameRange(Precision::PConfusion(), aC2D,
|
|
aTCFirst, aTCLast, aT1, aT2, aC2D);
|
|
}
|
|
|
|
// compute the appropriate tolerance for the edge
|
|
Handle(Geom_Surface) aS = pBAS->Surface().Surface();
|
|
aS = Handle(Geom_Surface)::DownCast(aS->Transformed(pBAS->Trsf()));
|
|
//
|
|
Standard_Real aT;
|
|
if (IntTools_Tools::ComputeTolerance
|
|
(aC3D, aC2D, aS, aT1, aT2, aTolR, aT)) {
|
|
if (aTolR > TolReached2d) {
|
|
TolReached2d = aTolR;
|
|
}
|
|
}
|
|
}
|
|
|
|
//=======================================================================
|
|
//function : MaxToleranceEdge
|
|
//purpose :
|
|
//=======================================================================
|
|
Standard_Real MaxToleranceEdge (const TopoDS_Face& aF)
|
|
{
|
|
Standard_Real aTol, aTolMax;
|
|
TopExp_Explorer aExp;
|
|
//
|
|
aTolMax=0.;
|
|
aExp.Init(aF, TopAbs_EDGE);
|
|
for (; aExp.More(); aExp.Next()) {
|
|
const TopoDS_Edge& aE=*((TopoDS_Edge *)&aExp.Current());
|
|
aTol=BRep_Tool::Tolerance(aE);
|
|
if (aTol>aTolMax) {
|
|
aTolMax=aTol;
|
|
}
|
|
}
|
|
return aTolMax;
|
|
}
|
|
|
|
//=======================================================================
|
|
//function : IsEdgeIsoline
|
|
//purpose :
|
|
//=======================================================================
|
|
void BOPTools_AlgoTools2D::IsEdgeIsoline( const TopoDS_Edge& theE,
|
|
const TopoDS_Face& theF,
|
|
Standard_Boolean& isTheUIso,
|
|
Standard_Boolean& isTheVIso)
|
|
{
|
|
isTheUIso = isTheVIso = Standard_False;
|
|
|
|
gp_Vec2d aT;
|
|
gp_Pnt2d aP;
|
|
Standard_Real aFirst = 0.0, aLast = 0.0;
|
|
const Handle(Geom2d_Curve) aPC = BRep_Tool::CurveOnSurface(theE, theF, aFirst, aLast);
|
|
|
|
aPC->D1(0.5*(aFirst+aLast), aP, aT);
|
|
|
|
const Standard_Real aSqMagn = aT.SquareMagnitude();
|
|
if(aSqMagn <= gp::Resolution())
|
|
return;
|
|
|
|
//Normalyze aT
|
|
aT /= sqrt(aSqMagn);
|
|
|
|
//sin(da) ~ da, when da->0.
|
|
const Standard_Real aTol = Precision::Angular();
|
|
const gp_Vec2d aRefVDir(0.0, 1.0), aRefUDir(1.0, 0.0);
|
|
|
|
const Standard_Real aDPv = aT.CrossMagnitude(aRefVDir),
|
|
aDPu = aT.CrossMagnitude(aRefUDir);
|
|
|
|
isTheUIso = (aDPv <= aTol);
|
|
isTheVIso = (aDPu <= aTol);
|
|
}
|