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119 lines
4.5 KiB
C++
Executable File
119 lines
4.5 KiB
C++
Executable File
// Copyright (c) 1999-2012 OPEN CASCADE SAS
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//
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// The content of this file is subject to the Open CASCADE Technology Public
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// License Version 6.5 (the "License"). You may not use the content of this file
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// except in compliance with the License. Please obtain a copy of the License
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// at http://www.opencascade.org and read it completely before using this file.
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//
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// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
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// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
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//
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// The Original Code and all software distributed under the License is
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// distributed on an "AS IS" basis, without warranty of any kind, and the
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// Initial Developer hereby disclaims all such warranties, including without
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// limitation, any warranties of merchantability, fitness for a particular
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// purpose or non-infringement. Please see the License for the specific terms
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// and conditions governing the rights and limitations under the License.
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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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