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250 lines
8.6 KiB
C++
250 lines
8.6 KiB
C++
// Created on: 1992-09-01
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// Created by: Modelistation
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// Copyright (c) 1992-1999 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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#ifndef _GeomAdaptor_Curve_HeaderFile
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#define _GeomAdaptor_Curve_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Handle.hxx>
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#include <GeomAbs_CurveType.hxx>
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#include <Standard_Real.hxx>
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#include <BSplCLib_Cache.hxx>
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#include <Adaptor3d_Curve.hxx>
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#include <GeomAbs_Shape.hxx>
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#include <Standard_Integer.hxx>
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#include <TColStd_Array1OfReal.hxx>
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#include <Standard_Boolean.hxx>
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#include <GeomEvaluator_Curve.hxx>
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class Geom_Curve;
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class Adaptor3d_HCurve;
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class Standard_NoSuchObject;
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class Standard_ConstructionError;
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class Standard_OutOfRange;
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class Standard_DomainError;
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class GeomAdaptor_Surface;
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class gp_Pnt;
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class gp_Vec;
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class gp_Lin;
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class gp_Circ;
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class gp_Elips;
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class gp_Hypr;
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class gp_Parab;
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class Geom_BezierCurve;
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class Geom_BSplineCurve;
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//! This class provides an interface between the services provided by any
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//! curve from the package Geom and those required of the curve by algorithms which use it.
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//! Creation of the loaded curve the curve is C1 by piece.
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class GeomAdaptor_Curve : public Adaptor3d_Curve
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{
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public:
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DEFINE_STANDARD_ALLOC
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GeomAdaptor_Curve();
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GeomAdaptor_Curve(const Handle(Geom_Curve)& C);
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//! ConstructionError is raised if Ufirst>Ulast
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GeomAdaptor_Curve(const Handle(Geom_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast);
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void Load (const Handle(Geom_Curve)& C);
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//! ConstructionError is raised if Ufirst>Ulast
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void Load (const Handle(Geom_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast);
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//! Provides a curve inherited from Hcurve from Adaptor.
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//! This is inherited to provide easy to use constructors.
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const Handle(Geom_Curve)& Curve() const;
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Standard_Real FirstParameter() const Standard_OVERRIDE;
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Standard_Real LastParameter() const Standard_OVERRIDE;
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Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE;
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//! Returns the number of intervals for continuity
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//! <S>. May be one if Continuity(me) >= <S>
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Standard_EXPORT Standard_Integer NbIntervals (const GeomAbs_Shape S) const Standard_OVERRIDE;
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//! Stores in <T> the parameters bounding the intervals
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//! of continuity <S>.
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//!
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//! The array must provide enough room to accomodate
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//! for the parameters. i.e. T.Length() > NbIntervals()
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Standard_EXPORT void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const Standard_OVERRIDE;
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//! Returns a curve equivalent of <me> between
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//! parameters <First> and <Last>. <Tol> is used to
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//! test for 3d points confusion.
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//! If <First> >= <Last>
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Standard_EXPORT Handle(Adaptor3d_HCurve) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const Standard_OVERRIDE;
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Standard_EXPORT Standard_Boolean IsClosed() const Standard_OVERRIDE;
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Standard_EXPORT Standard_Boolean IsPeriodic() const Standard_OVERRIDE;
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Standard_EXPORT Standard_Real Period() const Standard_OVERRIDE;
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//! Computes the point of parameter U on the curve
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Standard_EXPORT gp_Pnt Value (const Standard_Real U) const Standard_OVERRIDE;
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//! Computes the point of parameter U.
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Standard_EXPORT void D0 (const Standard_Real U, gp_Pnt& P) const Standard_OVERRIDE;
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//! Computes the point of parameter U on the curve
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//! with its first derivative.
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//!
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//! Warning : On the specific case of BSplineCurve:
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//! if the curve is cut in interval of continuity at least C1, the
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//! derivatives are computed on the current interval.
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//! else the derivatives are computed on the basis curve.
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Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt& P, gp_Vec& V) const Standard_OVERRIDE;
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//! Returns the point P of parameter U, the first and second
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//! derivatives V1 and V2.
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//!
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//! Warning : On the specific case of BSplineCurve:
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//! if the curve is cut in interval of continuity at least C2, the
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//! derivatives are computed on the current interval.
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//! else the derivatives are computed on the basis curve.
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Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2) const Standard_OVERRIDE;
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//! Returns the point P of parameter U, the first, the second
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//! and the third derivative.
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//!
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//! Warning : On the specific case of BSplineCurve:
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//! if the curve is cut in interval of continuity at least C3, the
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//! derivatives are computed on the current interval.
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//! else the derivatives are computed on the basis curve.
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Standard_EXPORT void D3 (const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3) const Standard_OVERRIDE;
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//! The returned vector gives the value of the derivative for the
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//! order of derivation N.
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//! Warning : On the specific case of BSplineCurve:
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//! if the curve is cut in interval of continuity CN, the
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//! derivatives are computed on the current interval.
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//! else the derivatives are computed on the basis curve.
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//! Raised if N < 1.
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Standard_EXPORT gp_Vec DN (const Standard_Real U, const Standard_Integer N) const Standard_OVERRIDE;
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//! returns the parametric resolution
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Standard_EXPORT Standard_Real Resolution (const Standard_Real R3d) const Standard_OVERRIDE;
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GeomAbs_CurveType GetType() const Standard_OVERRIDE;
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Standard_EXPORT gp_Lin Line() const Standard_OVERRIDE;
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Standard_EXPORT gp_Circ Circle() const Standard_OVERRIDE;
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Standard_EXPORT gp_Elips Ellipse() const Standard_OVERRIDE;
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Standard_EXPORT gp_Hypr Hyperbola() const Standard_OVERRIDE;
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Standard_EXPORT gp_Parab Parabola() const Standard_OVERRIDE;
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//! this should NEVER make a copy
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//! of the underlying curve to read
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//! the relevant information
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Standard_EXPORT Standard_Integer Degree() const Standard_OVERRIDE;
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//! this should NEVER make a copy
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//! of the underlying curve to read
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//! the relevant information
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Standard_EXPORT Standard_Boolean IsRational() const Standard_OVERRIDE;
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//! this should NEVER make a copy
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//! of the underlying curve to read
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//! the relevant information
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Standard_EXPORT Standard_Integer NbPoles() const Standard_OVERRIDE;
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//! this should NEVER make a copy
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//! of the underlying curve to read
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//! the relevant information
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Standard_EXPORT Standard_Integer NbKnots() const Standard_OVERRIDE;
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//! this will NOT make a copy of the
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//! Bezier Curve : If you want to modify
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//! the Curve please make a copy yourself
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//! Also it will NOT trim the surface to
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//! myFirst/Last.
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Standard_EXPORT Handle(Geom_BezierCurve) Bezier() const Standard_OVERRIDE;
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//! this will NOT make a copy of the
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//! BSpline Curve : If you want to modify
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//! the Curve please make a copy yourself
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//! Also it will NOT trim the surface to
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//! myFirst/Last.
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Standard_EXPORT Handle(Geom_BSplineCurve) BSpline() const Standard_OVERRIDE;
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friend class GeomAdaptor_Surface;
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protected:
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private:
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Standard_EXPORT GeomAbs_Shape LocalContinuity (const Standard_Real U1, const Standard_Real U2) const;
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Standard_EXPORT void load (const Handle(Geom_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast);
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//! Check theU relates to start or finish point of B-spline curve and return indices of span the point is located
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Standard_Boolean IsBoundary(const Standard_Real theU, Standard_Integer& theSpanStart, Standard_Integer& theSpanFinish) const;
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//! Rebuilds B-spline cache
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//! \param theParameter the value on the knot axis which identifies the caching span
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void RebuildCache (const Standard_Real theParameter) const;
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Handle(Geom_Curve) myCurve;
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GeomAbs_CurveType myTypeCurve;
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Standard_Real myFirst;
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Standard_Real myLast;
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Handle(Geom_BSplineCurve) myBSplineCurve; ///< B-spline representation to prevent castings
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Handle(BSplCLib_Cache) myCurveCache; ///< Cached data for B-spline or Bezier curve
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Handle(GeomEvaluator_Curve) myNestedEvaluator; ///< Calculates value of offset curve
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};
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#include <GeomAdaptor_Curve.lxx>
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#endif // _GeomAdaptor_Curve_HeaderFile
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