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 // Created on: 1997-05-05
 // Created by: Joelle CHAUVET
 // Copyright (c) 1997-1999 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 _GeomPlate_CurveConstraint_HeaderFile
 #define _GeomPlate_CurveConstraint_HeaderFile
 
 #include <Adaptor3d_CurveOnSurface.hxx>
 #include <GeomLProp_SLProps.hxx>
 
 class Geom2d_Curve;
 class Law_Function;
 class gp_Pnt;
 class gp_Vec;
 
 class GeomPlate_CurveConstraint;
 DEFINE_STANDARD_HANDLE(GeomPlate_CurveConstraint, Standard_Transient)
 
 //! Defines curves as constraints to be used to deform a surface.
 class GeomPlate_CurveConstraint : public Standard_Transient
 {
 
 public:
   //! Initializes an empty curve constraint object.
   Standard_EXPORT GeomPlate_CurveConstraint();
 
   //! Create a constraint
   //! Order is the order of the constraint. The possible values for order are -1,0,1,2.
   //! Order i means constraints Gi
   //! Npt is the number of points associated with the constraint.
   //! TolDist is the maximum error to satisfy for G0 constraints
   //! TolAng is the maximum error to satisfy for G1 constraints
   //! TolCurv is the maximum error to satisfy for G2 constraints
   //! These errors can be replaced by laws of criterion.
   //! Raises    ConstructionError if Order is not -1 , 0,  1,  2
   Standard_EXPORT GeomPlate_CurveConstraint(const Handle(Adaptor3d_Curve)& Boundary,
                                             const Standard_Integer         Order,
                                             const Standard_Integer         NPt     = 10,
                                             const Standard_Real            TolDist = 0.0001,
                                             const Standard_Real            TolAng  = 0.01,
                                             const Standard_Real            TolCurv = 0.1);
 
   //! Allows you to set the order of continuity required for
   //! the constraints: G0, G1, and G2, controlled
   //! respectively by G0Criterion G1Criterion and G2Criterion.
   Standard_EXPORT void SetOrder(const Standard_Integer Order);
 
   //! Returns the order of constraint, one of G0, G1 or G2.
   Standard_EXPORT Standard_Integer Order() const;
 
   //! Returns the number of points on the curve used as a
   //! constraint. The default setting is 10. This parameter
   //! affects computation time, which increases by the cube of
   //! the number of points.
   Standard_EXPORT Standard_Integer NbPoints() const;
 
   //! Allows you to set the number of points on the curve
   //! constraint. The default setting is 10. This parameter
   //! affects computation time, which increases by the cube of
   //! the number of points.
   Standard_EXPORT void SetNbPoints(const Standard_Integer NewNb);
 
   //! Allows you to set the G0 criterion. This is the law
   //! defining the greatest distance allowed between the
   //! constraint and the target surface for each point of the
   //! constraint. If this criterion is not set, TolDist, the
   //! distance tolerance from the constructor, is used.
   Standard_EXPORT void SetG0Criterion(const Handle(Law_Function)& G0Crit);
 
   //! Allows you to set the G1 criterion. This is the law
   //! defining the greatest angle allowed between the
   //! constraint and the target surface. If this criterion is not
   //! set, TolAng, the angular tolerance from the constructor, is used.
   //! Raises  ConstructionError if  the  curve  is  not  on  a  surface
   Standard_EXPORT void SetG1Criterion(const Handle(Law_Function)& G1Crit);
 
   Standard_EXPORT void SetG2Criterion(const Handle(Law_Function)& G2Crit);
 
   //! Returns the G0 criterion at the parametric point U on
   //! the curve. This is the greatest distance allowed between
   //! the constraint and the target surface at U.
   Standard_EXPORT Standard_Real G0Criterion(const Standard_Real U) const;
 
   //! Returns the G1 criterion at the parametric point U on
   //! the curve. This is the greatest angle allowed between
   //! the constraint and the target surface at U.
   //! Raises  ConstructionError if  the  curve  is  not  on  a  surface
   Standard_EXPORT Standard_Real G1Criterion(const Standard_Real U) const;
 
   //! Returns the G2 criterion at the parametric point U on
   //! the curve. This is the greatest difference in curvature
   //! allowed between the constraint and the target surface at U.
   //! Raises  ConstructionError if  the  curve  is  not  on  a  surface
   Standard_EXPORT Standard_Real G2Criterion(const Standard_Real U) const;
 
   Standard_EXPORT Standard_Real FirstParameter() const;
 
   Standard_EXPORT Standard_Real LastParameter() const;
 
   Standard_EXPORT Standard_Real Length() const;
 
   Standard_EXPORT GeomLProp_SLProps& LPropSurf(const Standard_Real U);
 
   Standard_EXPORT void D0(const Standard_Real U, gp_Pnt& P) const;
 
   Standard_EXPORT void D1(const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2) const;
 
   Standard_EXPORT void D2(const Standard_Real U,
                           gp_Pnt&             P,
                           gp_Vec&             V1,
                           gp_Vec&             V2,
                           gp_Vec&             V3,
                           gp_Vec&             V4,
                           gp_Vec&             V5) const;
 
   Standard_EXPORT Handle(Adaptor3d_Curve) Curve3d() const;
 
   //! loads a 2d curve associated the surface resulting of the constraints
   Standard_EXPORT void SetCurve2dOnSurf(const Handle(Geom2d_Curve)& Curve2d);
 
   //! Returns a 2d curve associated the surface resulting of the constraints
   Standard_EXPORT Handle(Geom2d_Curve) Curve2dOnSurf() const;
 
   //! loads a 2d curve  resulting from the normal projection of
   //! the curve on the initial surface
   Standard_EXPORT void SetProjectedCurve(const Handle(Adaptor2d_Curve2d)& Curve2d,
                                          const Standard_Real              TolU,
                                          const Standard_Real              TolV);
 
   //! Returns the projected curve resulting from the normal projection of the
   //! curve on the initial surface
   Standard_EXPORT Handle(Adaptor2d_Curve2d) ProjectedCurve() const;
 
   DEFINE_STANDARD_RTTIEXT(GeomPlate_CurveConstraint, Standard_Transient)
 
 protected:
   Handle(Adaptor3d_CurveOnSurface) myFrontiere;
   Standard_Integer                 myNbPoints;
   Standard_Integer                 myOrder;
   Handle(Adaptor3d_Curve)          my3dCurve;
   Standard_Integer                 myTang;
   Handle(Geom2d_Curve)             my2dCurve;
   Handle(Adaptor2d_Curve2d)        myHCurve2d;
   Handle(Law_Function)             myG0Crit;
   Handle(Law_Function)             myG1Crit;
   Handle(Law_Function)             myG2Crit;
   Standard_Boolean                 myConstG0;
   Standard_Boolean                 myConstG1;
   Standard_Boolean                 myConstG2;
   GeomLProp_SLProps                myLProp;
   Standard_Real                    myTolDist;
   Standard_Real                    myTolAng;
   Standard_Real                    myTolCurv;
   Standard_Real                    myTolU;
   Standard_Real                    myTolV;
 };
 
 #endif // _GeomPlate_CurveConstraint_HeaderFile

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