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d5f74e42d6
License statement text corrected; compiler warnings caused by Bison 2.41 disabled for MSVC; a few other compiler warnings on 54-bit Windows eliminated by appropriate type cast Wrong license statements corrected in several files. Copyright and license statements added in XSD and GLSL files. Copyright year updated in some files. Obsolete documentation files removed from DrawResources.
115 lines
4.1 KiB
C++
115 lines
4.1 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 <ShapeCustom_Curve.ixx>
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#include <Geom_BSplineCurve.hxx>
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#include <TColStd_Array1OfReal.hxx>
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#include <TColgp_Array1OfPnt.hxx>
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#include <TColStd_Array1OfInteger.hxx>
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#include <ShapeAnalysis_Curve.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 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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