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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.
154 lines
5.0 KiB
C++
154 lines
5.0 KiB
C++
// Created on: 1996-03-12
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// Created by: Bruno DUMORTIER
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// Copyright (c) 1995-1999 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 <Geom2dConvert_BSplineCurveToBezierCurve.ixx>
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#include <TColgp_Array1OfPnt2d.hxx>
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#include <TColStd_Array1OfReal.hxx>
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//=======================================================================
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//function : Geom2dConvert_BSplineCurveToBezierCurve
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//purpose :
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//=======================================================================
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Geom2dConvert_BSplineCurveToBezierCurve::Geom2dConvert_BSplineCurveToBezierCurve (const Handle(Geom2d_BSplineCurve)& BasisCurve)
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{
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myCurve = Handle(Geom2d_BSplineCurve)::DownCast(BasisCurve->Copy());
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// periodic curve can't be converted correctly by two main reasons:
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// last pole (equal to first one) is missing;
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// poles recomputation using default boor scheme is fails.
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if(myCurve->IsPeriodic()) myCurve->SetNotPeriodic();
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Standard_Real Uf = myCurve->FirstParameter();
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Standard_Real Ul = myCurve->LastParameter();
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myCurve->Segment(Uf,Ul);
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myCurve->IncreaseMultiplicity(myCurve->FirstUKnotIndex(),
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myCurve->LastUKnotIndex(),
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myCurve->Degree());
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}
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//=======================================================================
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//function : Geom2dConvert_BSplineCurveToBezierCurve
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//purpose :
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//=======================================================================
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Geom2dConvert_BSplineCurveToBezierCurve::Geom2dConvert_BSplineCurveToBezierCurve
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(const Handle(Geom2d_BSplineCurve)& BasisCurve,
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const Standard_Real U1,
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const Standard_Real U2,
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const Standard_Real ParametricTolerance)
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{
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if (U2 - U1 < ParametricTolerance)
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Standard_DomainError::Raise("GeomConvert_BSplineCurveToBezierSurface");
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Standard_Real Uf = U1, Ul = U2;
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Standard_Real PTol = ParametricTolerance/2 ;
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Standard_Integer I1, I2;
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myCurve = Handle(Geom2d_BSplineCurve)::DownCast(BasisCurve->Copy());
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if(myCurve->IsPeriodic()) myCurve->SetNotPeriodic();
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myCurve->LocateU(U1, PTol, I1, I2);
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if (I1==I2) { // On est sur le noeud
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if ( myCurve->Knot(I1) > U1) Uf = myCurve->Knot(I1);
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}
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myCurve->LocateU(U2, PTol, I1, I2);
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if (I1==I2) { // On est sur le noeud
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if ( myCurve->Knot(I1) < U2) Ul = myCurve->Knot(I1);
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}
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myCurve->Segment(Uf, Ul);
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myCurve->IncreaseMultiplicity(myCurve->FirstUKnotIndex(),
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myCurve->LastUKnotIndex(),
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myCurve->Degree());
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}
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//=======================================================================
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//function : Arc
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//purpose :
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//=======================================================================
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Handle(Geom2d_BezierCurve) Geom2dConvert_BSplineCurveToBezierCurve::Arc
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(const Standard_Integer Index)
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{
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if ( Index < 1 || Index > myCurve->NbKnots()-1) {
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Standard_OutOfRange::Raise("Geom2dConvert_BSplineCurveToBezierCurve");
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}
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Standard_Integer Deg = myCurve->Degree();
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TColgp_Array1OfPnt2d Poles(1,Deg+1);
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Handle(Geom2d_BezierCurve) C;
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if ( myCurve->IsRational()) {
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TColStd_Array1OfReal Weights(1,Deg+1);
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for ( Standard_Integer i = 1; i <= Deg+1; i++) {
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Poles(i) = myCurve->Pole(i+Deg*(Index-1));
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Weights(i) = myCurve->Weight(i+Deg*(Index-1));
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}
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C = new Geom2d_BezierCurve(Poles,Weights);
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}
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else {
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for ( Standard_Integer i = 1; i <= Deg+1; i++) {
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Poles(i) = myCurve->Pole(i+Deg*(Index-1));
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}
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C = new Geom2d_BezierCurve(Poles);
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}
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return C;
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}
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//=======================================================================
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//function : Arcs
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//purpose :
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//=======================================================================
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void Geom2dConvert_BSplineCurveToBezierCurve::Arcs
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(TColGeom2d_Array1OfBezierCurve& Curves)
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{
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Standard_Integer n = NbArcs();
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for ( Standard_Integer i = 1; i <= n; i++) {
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Curves(i) = Arc(i);
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}
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}
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//=======================================================================
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//function : Knots
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//purpose :
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//=======================================================================
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void Geom2dConvert_BSplineCurveToBezierCurve::Knots
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(TColStd_Array1OfReal& TKnots) const
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{
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Standard_Integer ii, kk;
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for (ii = 1, kk = TKnots.Lower();
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ii <=myCurve->NbKnots(); ii++, kk++)
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TKnots(kk) = myCurve->Knot(ii);
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}
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//=======================================================================
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//function : NbArcs
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//purpose :
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//=======================================================================
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Standard_Integer Geom2dConvert_BSplineCurveToBezierCurve::NbArcs() const
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{
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return (myCurve->NbKnots()-1);
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}
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