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0797d9d30a
Macros ending on "DEB" are replaced by OCCT_DEBUG across OCCT code; new macros described in documentation. Macros starting with DEB are changed to start with "OCCT_DEBUG_". Some code cleaned.
193 lines
7.0 KiB
C++
193 lines
7.0 KiB
C++
// Created on: 1999-04-14
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// Created by: Roman LYGIN
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// Copyright (c) 1999-1999 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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#include <ShapeUpgrade_SplitCurve2dContinuity.ixx>
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#include <Standard_ErrorHandler.hxx>
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#include <Standard_Failure.hxx>
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#include <Geom2d_BSplineCurve.hxx>
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#include <Precision.hxx>
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#include <ShapeUpgrade.hxx>
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#include <Geom2d_TrimmedCurve.hxx>
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#include <Geom2d_OffsetCurve.hxx>
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#include <TColGeom2d_HArray1OfCurve.hxx>
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#include <TColStd_HSequenceOfReal.hxx>
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#include <TColGeom2d_HArray1OfCurve.hxx>
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#include <ShapeExtend.hxx>
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//=======================================================================
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//function : ShapeUpgrade_SplitCurve2dContinuity
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//purpose :
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//=======================================================================
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ShapeUpgrade_SplitCurve2dContinuity::ShapeUpgrade_SplitCurve2dContinuity()
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{
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myCriterion = GeomAbs_C1;
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myTolerance = Precision::PConfusion();
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myCont =1;
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}
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//=======================================================================
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//function : SetCriterion
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//purpose :
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//=======================================================================
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void ShapeUpgrade_SplitCurve2dContinuity::SetCriterion(const GeomAbs_Shape Criterion)
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{
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myCriterion = Criterion;
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switch (myCriterion) {
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case GeomAbs_C0 : myCont = 0; break;
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case GeomAbs_C1 : myCont = 1; break;
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case GeomAbs_C2 : myCont = 2; break;
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case GeomAbs_C3 : myCont = 3; break;
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case GeomAbs_CN : myCont = 4; break;
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default : myCont = 1;
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}
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}
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//=======================================================================
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//function : SetTolerance
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//purpose :
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//=======================================================================
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void ShapeUpgrade_SplitCurve2dContinuity::SetTolerance(const Standard_Real Tol)
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{
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myTolerance = Tol;
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}
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//=======================================================================
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//function : Compute
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//purpose :
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//=======================================================================
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void ShapeUpgrade_SplitCurve2dContinuity::Compute()
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{
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if(myCurve->Continuity() < myCriterion)
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myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE2);
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if (mySplitValues->Length() > 2)
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myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE1);
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Standard_Real precision = Precision::PConfusion();
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Standard_Real First = mySplitValues->Value(1);
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Standard_Real Last = mySplitValues->Value(mySplitValues->Length());
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if (myCurve->IsKind(STANDARD_TYPE(Geom2d_TrimmedCurve))) {
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Handle(Geom2d_TrimmedCurve) tmp = Handle(Geom2d_TrimmedCurve)::DownCast (myCurve);
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Handle(Geom2d_Curve) BasCurve = tmp->BasisCurve();
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ShapeUpgrade_SplitCurve2dContinuity spc;
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// spc.Init(BasCurve,Max(First,tmp->FirstParameter()),Min(Last,tmp->LastParameter()));
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spc.Init(BasCurve,First,Last);
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spc.SetSplitValues(mySplitValues);
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spc.SetTolerance(myTolerance);
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spc.SetCriterion(myCriterion);
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spc.Compute();
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mySplitValues->Clear();
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mySplitValues->ChangeSequence() = spc.SplitValues()->Sequence();
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//mySplitValues = spc.SplitValues();
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myStatus |= spc.myStatus;
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return;
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}
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else if (myCurve->IsKind(STANDARD_TYPE(Geom2d_OffsetCurve))) {
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GeomAbs_Shape BasCriterion;
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switch (myCriterion) {
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default :
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case GeomAbs_C1 : BasCriterion = GeomAbs_C2; break;
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case GeomAbs_C2 : BasCriterion = GeomAbs_C3; break;
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case GeomAbs_C3 : //if (ShapeUpgrade::Debug()) cout<<". this criterion is not suitable for a Offset curve"<<endl;
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#ifdef OCCT_DEBUG
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cout << "Warning: ShapeUpgrade_SplitCurve2dContinuity: criterion C3 for Offset curve" << endl;
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#endif
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case GeomAbs_CN : BasCriterion = GeomAbs_CN; break;
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}
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Handle(Geom2d_OffsetCurve) tmp = Handle(Geom2d_OffsetCurve)::DownCast (myCurve);
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Handle(Geom2d_Curve) BasCurve = tmp->BasisCurve();
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//Standard_Real Offset = tmp->Offset(); // Offset not used (skl)
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ShapeUpgrade_SplitCurve2dContinuity spc;
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// spc.Init(BasCurve,Max(tmp->FirstParameter(),First),Min(tmp->LastParameter(),Last));
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spc.Init(BasCurve,First,Last);
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spc.SetSplitValues(mySplitValues);
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spc.SetTolerance(myTolerance);
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spc.SetCriterion(BasCriterion);
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spc.Compute();
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mySplitValues->Clear();
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mySplitValues->ChangeSequence() = spc.SplitValues()->Sequence();
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myStatus |= spc.myStatus;
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return;
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}
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Handle(Geom2d_BSplineCurve) MyBSpline = Handle(Geom2d_BSplineCurve)::DownCast (myCurve);
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if (MyBSpline.IsNull()) {
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// if (ShapeUpgrade::Debug()) cout<<". curve is not a Bspline"<<endl;
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return;
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}
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myNbCurves=1;
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Standard_Integer Deg=MyBSpline->Degree();
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Standard_Integer NbKnots= MyBSpline->NbKnots();
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// if (ShapeUpgrade::Debug()) cout<<". NbKnots="<<NbKnots<<endl;
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if (NbKnots <= 2) {
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return;
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}
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Standard_Integer FirstInd =MyBSpline->FirstUKnotIndex()+1,
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LastInd = MyBSpline->LastUKnotIndex()-1;
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Standard_Integer iknot = FirstInd;
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for(Standard_Integer j =2; j <= mySplitValues->Length(); j++) {
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Last = mySplitValues->Value(j);
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for (; iknot <= LastInd; iknot++) {
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Standard_Real valknot = MyBSpline->Knot(iknot);
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if(valknot <= First + precision) continue;
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if(valknot >= Last - precision) break;
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Standard_Integer Continuity=Deg-MyBSpline->Multiplicity(iknot);
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//Standard_Real tt = MyBSpline->Knot(iknot); // tt not used (skl)
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if (Continuity < myCont) {
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// At this knot, the curve is C0; try to remove Knot.
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Standard_Boolean corrected = Standard_False;
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Standard_Integer newMultiplicity = Deg - myCont;
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if (newMultiplicity < 0) newMultiplicity = 0;
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{
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try {
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OCC_CATCH_SIGNALS
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corrected = MyBSpline->RemoveKnot(iknot, newMultiplicity, myTolerance);
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}
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catch (Standard_Failure) {
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corrected = Standard_False;
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}
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}
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if (corrected && newMultiplicity > 0) {
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Continuity=Deg-MyBSpline->Multiplicity(iknot);
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corrected = (Continuity >= myCont);
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}
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if (corrected) {
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// at this knot, the continuity is now C1. Nothing else to do.
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// if (ShapeUpgrade::Debug()) cout<<". Correction at Knot "<<iknot<<endl;
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myStatus |= ShapeExtend::EncodeStatus ( ShapeExtend_DONE3 );
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}
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else {
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// impossible to force C1 within the tolerance:
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// this knot will be a splitting value.
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mySplitValues->InsertBefore(j++,MyBSpline->Knot(iknot));
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myNbCurves++;
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// if (ShapeUpgrade::Debug()) cout<<". Splitting at Knot "<<iknot<<endl;
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}
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}
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}
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First = Last;
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}
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if (mySplitValues->Length() > 2)
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myStatus = ShapeExtend::EncodeStatus (ShapeExtend_DONE1);
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}
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