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42cf5bc1ca
Automatic upgrade of OCCT code by command "occt_upgrade . -nocdl": - WOK-generated header files from inc and sources from drv are moved to src - CDL files removed - All packages are converted to nocdlpack
116 lines
4.2 KiB
C++
116 lines
4.2 KiB
C++
// 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 <Geom_BSplineCurve.hxx>
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#include <Geom_Curve.hxx>
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#include <ShapeAnalysis_Curve.hxx>
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#include <ShapeCustom_Curve.hxx>
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#include <TColgp_Array1OfPnt.hxx>
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#include <TColStd_Array1OfInteger.hxx>
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#include <TColStd_Array1OfReal.hxx>
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ShapeCustom_Curve::ShapeCustom_Curve()
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{
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}
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//=======================================================================
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//function : ShapeCustom_Curve
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//purpose :
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//=======================================================================
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ShapeCustom_Curve::ShapeCustom_Curve (const Handle(Geom_Curve)& C)
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{
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Init ( C );
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}
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//=======================================================================
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//function : Init
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//purpose :
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//=======================================================================
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void ShapeCustom_Curve::Init (const Handle(Geom_Curve)& C)
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{
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myCurve = C;
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}
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//=======================================================================
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//function : ConvertToPeriodic
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//purpose :
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//=======================================================================
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Handle(Geom_Curve) ShapeCustom_Curve::ConvertToPeriodic (const Standard_Boolean substitute,
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const Standard_Real preci)
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{
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Handle(Geom_Curve) newCurve;
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Handle(Geom_BSplineCurve) BSpl = Handle(Geom_BSplineCurve)::DownCast(myCurve);
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if (BSpl.IsNull()) return newCurve;
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// PTV 13.02.02: check if curve closed with tolerance
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Standard_Boolean closed = ShapeAnalysis_Curve::IsClosed(myCurve, preci);
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if ( ! closed ) return newCurve;
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Standard_Boolean converted = Standard_False; //:p6
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if ( closed && ! BSpl->IsPeriodic() && BSpl->NbPoles() >3 ) {
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Standard_Boolean set = Standard_True;
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// if degree+1 at ends, first change it to 1 by rearranging knots
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if ( BSpl->Multiplicity(1) == BSpl->Degree() + 1 &&
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BSpl->Multiplicity(BSpl->NbKnots()) == BSpl->Degree() + 1 ) {
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Standard_Integer nbPoles = BSpl->NbPoles();
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TColgp_Array1OfPnt oldPoles(1,nbPoles);
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TColStd_Array1OfReal oldWeights(1,nbPoles);
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Standard_Integer nbKnots = BSpl->NbKnots();
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TColStd_Array1OfReal oldKnots(1,nbKnots);
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TColStd_Array1OfInteger oldMults(1,nbKnots);
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BSpl->Poles(oldPoles);
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BSpl->Weights(oldWeights);
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BSpl->Knots(oldKnots);
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BSpl->Multiplicities(oldMults);
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TColStd_Array1OfReal newKnots (1,nbKnots+2);
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TColStd_Array1OfInteger newMults(1,nbKnots+2);
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Standard_Real a = 0.5 * ( BSpl->Knot(2) - BSpl->Knot(1) +
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BSpl->Knot(nbKnots) - BSpl->Knot(nbKnots-1) );
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newKnots(1) = oldKnots(1) - a;
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newKnots(nbKnots+2) = oldKnots(nbKnots) + a;
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newMults(1) = newMults(nbKnots+2) = 1;
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for (Standard_Integer i = 2; i<=nbKnots+1; i++) {
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newKnots(i) = oldKnots(i-1);
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newMults(i) = oldMults(i-1);
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}
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newMults(2) = newMults(nbKnots+1) = BSpl->Degree();
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Handle(Geom_BSplineCurve) res = new Geom_BSplineCurve(oldPoles, oldWeights,
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newKnots,newMults,
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BSpl->Degree(),BSpl->IsPeriodic());
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BSpl = res;
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}
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else if ( BSpl->Multiplicity(1) > BSpl->Degree() ||
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BSpl->Multiplicity(BSpl->NbKnots()) > BSpl->Degree() + 1 ) set = Standard_False;
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if ( set ) {
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BSpl->SetPeriodic(); // make periodic
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converted = Standard_True;
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}
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}
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#ifdef OCCT_DEBUG
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cout << "Warning: ShapeCustom_Surface: Closed BSplineSurface is caused to be periodic" << endl;
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#endif
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if ( ! converted ) return newCurve;
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newCurve = BSpl;
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if ( substitute ) myCurve = newCurve;
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return newCurve;
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}
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