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 // Created on: 1993-09-20
 // Created by: Modelistation
 // Copyright (c) 1993-1999 Matra Datavision
 // Copyright (c) 1999-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _AppParCurves_MultiBSpCurve_HeaderFile
 #define _AppParCurves_MultiBSpCurve_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <TColStd_HArray1OfReal.hxx>
 #include <TColStd_HArray1OfInteger.hxx>
 #include <Standard_Integer.hxx>
 #include <AppParCurves_MultiCurve.hxx>
 #include <AppParCurves_Array1OfMultiPoint.hxx>
 #include <TColStd_Array1OfReal.hxx>
 #include <TColStd_Array1OfInteger.hxx>
 #include <Standard_OStream.hxx>
 class gp_Pnt;
 class gp_Pnt2d;
 class gp_Vec;
 class gp_Vec2d;
 
 
 //! This class describes a MultiBSpCurve approximating a Multiline.
 //! Just as a Multiline is a set of a given number of lines, a MultiBSpCurve is a set
 //! of a specified number of bsplines defined by:
 //! -   A specified number of MultiPoints - the poles of a specified number of curves
 //! -   The degree of approximation identical for each of the specified number of curves.
 //!
 //! Example of a MultiBSpCurve composed of a specified number of MultiPoints:
 //!
 //! P1______P2_____P3______P4________........_____PNbMPoints
 //!
 //! Q1______Q2_____Q3______Q4________........_____QNbMPoints
 //! .                                               .
 //! .                                               .
 //! .                                               .
 //! R1______R2_____R3______R4________........_____RNbMPoints
 //!
 //! Pi, Qi, ..., Ri are points of dimension 2 or 3.
 //!
 //! (Pi, Qi, ...Ri), i= 1,...NbPoles are MultiPoints.
 //! each MultiPoint has got NbPol Poles.
 //! MultiBSpCurves are created by the SplineValue method in the ComputeLine
 //! class, and by the Value method in TheVariational class. MultiBSpCurve
 //! provides the information required to create the BSpline defined by the approximation.
 class AppParCurves_MultiBSpCurve  : public AppParCurves_MultiCurve
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   
   //! returns an indefinite MultiBSpCurve.
   Standard_EXPORT AppParCurves_MultiBSpCurve();
   
   //! creates a MultiBSpCurve, describing BSpline curves all
   //! containing the same number of MultiPoint.
   //! An exception is raised if Degree < 0.
   Standard_EXPORT AppParCurves_MultiBSpCurve(const Standard_Integer NbPol);
   
   //! creates a MultiBSpCurve, describing BSpline curves all
   //! containing the same number of MultiPoint.
   //! Each MultiPoint must have NbCurves Poles.
   Standard_EXPORT AppParCurves_MultiBSpCurve(const AppParCurves_Array1OfMultiPoint& tabMU, const TColStd_Array1OfReal& Knots, const TColStd_Array1OfInteger& Mults);
   
   //! creates a MultiBSpCurve, describing BSpline
   //! curves, taking control points from <SC>.
   Standard_EXPORT AppParCurves_MultiBSpCurve(const AppParCurves_MultiCurve& SC, const TColStd_Array1OfReal& Knots, const TColStd_Array1OfInteger& Mults);
   
   //! Knots of the multiBSpCurve are assigned to <theknots>.
   Standard_EXPORT void SetKnots (const TColStd_Array1OfReal& theKnots);
   
   //! Multiplicities of the multiBSpCurve are assigned
   //! to <theMults>.
   Standard_EXPORT void SetMultiplicities (const TColStd_Array1OfInteger& theMults);
   
   //! Returns an array of Reals containing
   //! the multiplicities of curves resulting from the approximation.
   Standard_EXPORT const TColStd_Array1OfReal& Knots() const;
   
   //! Returns an array of Reals containing the
   //! multiplicities of curves resulting from the approximation.
   Standard_EXPORT const TColStd_Array1OfInteger& Multiplicities() const;
   
   //! returns the degree of the curve(s).
   Standard_EXPORT virtual Standard_Integer Degree() const Standard_OVERRIDE;
   
   //! returns the value of the point with a parameter U
   //! on the BSpline curve number CuIndex.
   //! An exception is raised if CuIndex <0 or > NbCurves.
   //! An exception is raised if the curve dimension is 2d.
   Standard_EXPORT virtual void Value (const Standard_Integer CuIndex, const Standard_Real U, gp_Pnt& Pt) const Standard_OVERRIDE;
   
   //! returns the value of the point with a parameter U
   //! on the BSpline curve number CuIndex.
   //! An exception is raised if CuIndex <0 or > NbCurves.
   //! An exception is raised if the curve dimension is 3d.
   Standard_EXPORT virtual void Value (const Standard_Integer CuIndex, const Standard_Real U, gp_Pnt2d& Pt) const Standard_OVERRIDE;
   
   //! returns the value of the point with a parameter U
   //! on the BSpline curve number CuIndex.
   //! An exception is raised if CuIndex <0 or > NbCurves.
   //! An exception is raised if the curve dimension is 3d.
   Standard_EXPORT virtual void D1 (const Standard_Integer CuIndex, const Standard_Real U, gp_Pnt& Pt, gp_Vec& V1) const Standard_OVERRIDE;
   
   //! returns the value of the point with a parameter U
   //! on the BSpline curve number CuIndex.
   //! An exception is raised if CuIndex <0 or > NbCurves.
   //! An exception is raised if the curve dimension is 2d.
   Standard_EXPORT virtual void D1 (const Standard_Integer CuIndex, const Standard_Real U, gp_Pnt2d& Pt, gp_Vec2d& V1) const Standard_OVERRIDE;
   
   //! returns the value of the point with a parameter U
   //! on the BSpline curve number CuIndex.
   //! An exception is raised if CuIndex <0 or > NbCurves.
   //! An exception is raised if the curve dimension is 3d.
   Standard_EXPORT virtual void D2 (const Standard_Integer CuIndex, const Standard_Real U, gp_Pnt& Pt, gp_Vec& V1, gp_Vec& V2) const Standard_OVERRIDE;
   
   //! returns the value of the point with a parameter U
   //! on the BSpline curve number CuIndex.
   //! An exception is raised if CuIndex <0 or > NbCurves.
   //! An exception is raised if the curve dimension is 2d.
   Standard_EXPORT virtual void D2 (const Standard_Integer CuIndex, const Standard_Real U, gp_Pnt2d& Pt, gp_Vec2d& V1, gp_Vec2d& V2) const Standard_OVERRIDE;
   
   //! Prints on the stream o information on the current
   //! state of the object.
   //! Is used to redefine the operator <<.
   Standard_EXPORT virtual void Dump (Standard_OStream& o) const Standard_OVERRIDE;
 
 
 
 
 protected:
 
 
 
 
 
 private:
 
 
 
   Handle(TColStd_HArray1OfReal) myknots;
   Handle(TColStd_HArray1OfInteger) mymults;
   Standard_Integer myDegree;
 
 
 };
 
 
 
 
 
 
 
 #endif // _AppParCurves_MultiBSpCurve_HeaderFile

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