// File generated by CPPExt (Value)
//
//                     Copyright (C) 1991 - 2000 by  
//                      Matra Datavision SA.  All rights reserved.
//  
//                     Copyright (C) 2001 - 2004 by
//                     Open CASCADE SA.  All rights reserved.
// 
// This file is part of the Open CASCADE Technology software.
//
// This software may be distributed and/or modified under the terms and
// conditions of the Open CASCADE Public License as defined by Open CASCADE SA
// and appearing in the file LICENSE included in the packaging of this file.
//  
// This software is distributed on an "AS IS" basis, without warranty of any
// kind, and Open CASCADE SA hereby disclaims all such warranties,
// including without limitation, any warranties of merchantability, fitness
// for a particular purpose or non-infringement. Please see the License for
// the specific terms and conditions governing rights and limitations under the
// License.

#ifndef _Blend_SurfRstFunction_HeaderFile
#define _Blend_SurfRstFunction_HeaderFile

#ifndef _Blend_AppFunction_HeaderFile
#include <Blend_AppFunction.hxx>
#endif
#ifndef _Standard_Integer_HeaderFile
#include <Standard_Integer.hxx>
#endif
#ifndef _Standard_Boolean_HeaderFile
#include <Standard_Boolean.hxx>
#endif
#ifndef _Standard_Real_HeaderFile
#include <Standard_Real.hxx>
#endif
#ifndef _GeomAbs_Shape_HeaderFile
#include <GeomAbs_Shape.hxx>
#endif
class Standard_DomainError;
class math_Vector;
class math_Matrix;
class gp_Pnt;
class gp_Pnt2d;
class gp_Vec;
class gp_Vec2d;
class TColStd_Array1OfReal;
class TColStd_Array1OfInteger;
class Blend_Point;
class TColgp_Array1OfPnt;
class TColgp_Array1OfVec;
class TColgp_Array1OfPnt2d;
class TColgp_Array1OfVec2d;


#ifndef _Standard_HeaderFile
#include <Standard.hxx>
#endif
#ifndef _Standard_Macro_HeaderFile
#include <Standard_Macro.hxx>
#endif

//! Deferred class for a function used to compute a blending <br>
//!          surface between a surface and a pcurve on an other Surface, <br>
//!          using a guide line. <br>
//!          The vector <X> used in Value, Values and Derivatives methods <br>
//!          may be the vector of the parametric coordinates U,V, <br>
//!          W of the extremities of a section on the surface  and <br>
//!          the curve. <br>
class Blend_SurfRstFunction  : public Blend_AppFunction {

public:

    void* operator new(size_t,void* anAddress) 
      {
        return anAddress;
      }
    void* operator new(size_t size) 
      { 
        return Standard::Allocate(size); 
      }
    void  operator delete(void *anAddress) 
      { 
        if (anAddress) Standard::Free((Standard_Address&)anAddress); 
      }
 // Methods PUBLIC
 // 

//! Returns 3 (default value). Can be redefined. <br>
Standard_EXPORT virtual  Standard_Integer NbVariables() const = 0;

//! returns the number of equations of the function. <br>
Standard_EXPORT virtual  Standard_Integer NbEquations() const = 0;

//! computes the values <F> of the Functions for the <br>
//!          variable <X>. <br>
//!          Returns True if the computation was done successfully, <br>
//!          False otherwise. <br>
Standard_EXPORT virtual  Standard_Boolean Value(const math_Vector& X,math_Vector& F)  = 0;

//! returns the values <D> of the derivatives for the <br>
//!          variable <X>. <br>
//!          Returns True if the computation was done successfully, <br>
//!          False otherwise. <br>
Standard_EXPORT virtual  Standard_Boolean Derivatives(const math_Vector& X,math_Matrix& D)  = 0;

//! returns the values <F> of the functions and the derivatives <br>
//!          <D> for the variable <X>. <br>
//!          Returns True if the computation was done successfully, <br>
//!          False otherwise. <br>
Standard_EXPORT virtual  Standard_Boolean Values(const math_Vector& X,math_Vector& F,math_Matrix& D)  = 0;

//! Sets the value of the parameter along the guide line. <br>
//!          This determines the plane in which the solution has <br>
//!          to be found. <br>
Standard_EXPORT virtual  void Set(const Standard_Real Param)  = 0;

//! Sets the bounds of the parametric interval on <br>
//!          the guide line. <br>
//!          This determines the derivatives in these values if the <br>
//!          function is not Cn. <br>
Standard_EXPORT virtual  void Set(const Standard_Real First,const Standard_Real Last)  = 0;

//! Returns in the vector Tolerance the parametric tolerance <br>
//!          for each variable; <br>
//!          Tol is the tolerance used in 3d space. <br>
Standard_EXPORT virtual  void GetTolerance(math_Vector& Tolerance,const Standard_Real Tol) const = 0;

//! Returns in the vector InfBound the lowest values allowed <br>
//!          for each variables. <br>
//!          Returns in the vector SupBound the greatest values allowed <br>
//!          for each of the 3 variables. <br>
Standard_EXPORT virtual  void GetBounds(math_Vector& InfBound,math_Vector& SupBound) const = 0;

//! Returns Standard_True if Sol is a zero of the function. <br>
//!          Tol is the tolerance used in 3d space. <br>
//!          The computation is made at the current value of <br>
//!          the parameter on the guide line. <br>
Standard_EXPORT virtual  Standard_Boolean IsSolution(const math_Vector& Sol,const Standard_Real Tol)  = 0;

//! Returns   the    minimal  Distance  beetween   two <br>
//!          extremitys of calculed sections. <br>
Standard_EXPORT   Standard_Real GetMinimalDistance() const;

//! Returns the point on the first support. <br>
Standard_EXPORT  const gp_Pnt& Pnt1() const;

//! Returns the point on the seconde support. <br>
Standard_EXPORT  const gp_Pnt& Pnt2() const;

//! Returns the point on the surface. <br>
Standard_EXPORT virtual const gp_Pnt& PointOnS() const = 0;

//! Returns the point on the curve. <br>
Standard_EXPORT virtual const gp_Pnt& PointOnRst() const = 0;

//! Returns U,V coordinates of the point on the surface. <br>
Standard_EXPORT virtual const gp_Pnt2d& Pnt2dOnS() const = 0;

//! Returns  U,V coordinates of the point  on the curve on <br>
//!          surface. <br>
Standard_EXPORT virtual const gp_Pnt2d& Pnt2dOnRst() const = 0;

//! Returns parameter of the point on the curve. <br>
Standard_EXPORT virtual  Standard_Real ParameterOnRst() const = 0;

//! Returns True when it is not possible to compute <br>
//!          the tangent vectors at PointOnS and/or PointOnRst. <br>
Standard_EXPORT virtual  Standard_Boolean IsTangencyPoint() const = 0;

//! Returns the tangent vector at PointOnS, in 3d space. <br>
Standard_EXPORT virtual const gp_Vec& TangentOnS() const = 0;

//! Returns the tangent vector at PointOnS, in the <br>
//!          parametric space of the first surface. <br>
Standard_EXPORT virtual const gp_Vec2d& Tangent2dOnS() const = 0;

//! Returns the tangent vector at PointOnC, in 3d space. <br>
Standard_EXPORT virtual const gp_Vec& TangentOnRst() const = 0;

//! Returns the tangent vector at PointOnRst, in the <br>
//!          parametric space of the second surface. <br>
Standard_EXPORT virtual const gp_Vec2d& Tangent2dOnRst() const = 0;

//! Enables implementation  of a criterion of decrochage <br>
//!          specific to  the function. <br>
Standard_EXPORT virtual  Standard_Boolean Decroch(const math_Vector& Sol,gp_Vec& NS,gp_Vec& TgS) const = 0;

//! Returns  if the section is rationnal <br>
Standard_EXPORT virtual  Standard_Boolean IsRational() const = 0;

//!  Returns the length of the maximum section <br>
Standard_EXPORT virtual  Standard_Real GetSectionSize() const = 0;

//! Compute the minimal value of weight for each poles <br>
//!          of all sections. <br>
Standard_EXPORT virtual  void GetMinimalWeight(TColStd_Array1OfReal& Weigths) const = 0;

//! Returns  the number  of  intervals for  continuity <br>
//!          <S>. May be one if Continuity(me) >= <S> <br>
Standard_EXPORT virtual  Standard_Integer NbIntervals(const GeomAbs_Shape S) const = 0;

//! Stores in <T> the  parameters bounding the intervals <br>
//!          of continuity <S>. <br>
//! <br>
//!          The array must provide  enough room to  accomodate <br>
//!          for the parameters. i.e. T.Length() > NbIntervals() <br>
Standard_EXPORT virtual  void Intervals(TColStd_Array1OfReal& T,const GeomAbs_Shape S) const = 0;


Standard_EXPORT virtual  void GetShape(Standard_Integer& NbPoles,Standard_Integer& NbKnots,Standard_Integer& Degree,Standard_Integer& NbPoles2d)  = 0;

//! Returns the tolerance to reach in approximation <br>
//!          to respecte <br>
//!          BoundTol error at the Boundary <br>
//!          AngleTol tangent error at the Boundary <br>
//!          SurfTol error inside the surface. <br>
Standard_EXPORT virtual  void GetTolerance(const Standard_Real BoundTol,const Standard_Real SurfTol,const Standard_Real AngleTol,math_Vector& Tol3d,math_Vector& Tol1D) const = 0;


Standard_EXPORT virtual  void Knots(TColStd_Array1OfReal& TKnots)  = 0;


Standard_EXPORT virtual  void Mults(TColStd_Array1OfInteger& TMults)  = 0;

//! Used for the first and last section <br>
//!          The method returns Standard_True if the derivatives <br>
//!          are computed, otherwise it returns Standard_False. <br>
Standard_EXPORT virtual  Standard_Boolean Section(const Blend_Point& P,TColgp_Array1OfPnt& Poles,TColgp_Array1OfVec& DPoles,TColgp_Array1OfPnt2d& Poles2d,TColgp_Array1OfVec2d& DPoles2d,TColStd_Array1OfReal& Weigths,TColStd_Array1OfReal& DWeigths)  = 0;

//! Used for the first and last section <br>
//!          The method returns Standard_True if the derivatives <br>
//!          are computed, otherwise it returns Standard_False. <br>
Standard_EXPORT virtual  Standard_Boolean Section(const Blend_Point& P,TColgp_Array1OfPnt& Poles,TColgp_Array1OfVec& DPoles,TColgp_Array1OfVec& D2Poles,TColgp_Array1OfPnt2d& Poles2d,TColgp_Array1OfVec2d& DPoles2d,TColgp_Array1OfVec2d& D2Poles2d,TColStd_Array1OfReal& Weigths,TColStd_Array1OfReal& DWeigths,TColStd_Array1OfReal& D2Weigths)  = 0;


Standard_EXPORT virtual  void Section(const Blend_Point& P,TColgp_Array1OfPnt& Poles,TColgp_Array1OfPnt2d& Poles2d,TColStd_Array1OfReal& Weigths)  = 0;





protected:

 // Methods PROTECTED
 // 


 // Fields PROTECTED
 //


private: 

 // Methods PRIVATE
 // 


 // Fields PRIVATE
 //


};





// other Inline functions and methods (like "C++: function call" methods)
//


#endif
