1 // Created on: 1997-02-21
2 // Created by: Laurent BOURESCHE
3 // Copyright (c) 1997-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #ifndef _Blend_SurfCurvFuncInv_HeaderFile
18 #define _Blend_SurfCurvFuncInv_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <math_FunctionSetWithDerivatives.hxx>
25 #include <Standard_Integer.hxx>
26 #include <Standard_Boolean.hxx>
27 #include <math_Vector.hxx>
28 #include <Standard_Real.hxx>
30 class Adaptor2d_HCurve2d;
33 //! Deferred class for a function used to compute a
34 //! blending surface between a surface and a curve, using
35 //! a guide line. This function is used to find a
36 //! solution on a done restriction of the surface.
38 //! The vector <X> used in Value, Values and Derivatives
39 //! methods has to be the vector of the parametric
40 //! coordinates wguide, wcurv, wrst where wguide is the
41 //! parameter on the guide line, wcurv is the parameter on
42 //! the curve, wrst is the parameter on the restriction on
44 class Blend_SurfCurvFuncInv : public math_FunctionSetWithDerivatives
52 Standard_EXPORT Standard_Integer NbVariables() const;
54 //! returns the number of equations of the function.
55 Standard_EXPORT virtual Standard_Integer NbEquations() const = 0;
57 //! computes the values <F> of the Functions for the
59 //! Returns True if the computation was done successfully,
61 Standard_EXPORT virtual Standard_Boolean Value (const math_Vector& X, math_Vector& F) = 0;
63 //! returns the values <D> of the derivatives for the
65 //! Returns True if the computation was done successfully,
67 Standard_EXPORT virtual Standard_Boolean Derivatives (const math_Vector& X, math_Matrix& D) = 0;
69 //! returns the values <F> of the functions and the derivatives
70 //! <D> for the variable <X>.
71 //! Returns True if the computation was done successfully,
73 Standard_EXPORT virtual Standard_Boolean Values (const math_Vector& X, math_Vector& F, math_Matrix& D) = 0;
75 //! Set the Point on which a solution has to be found.
76 Standard_EXPORT virtual void Set (const Handle(Adaptor2d_HCurve2d)& Rst) = 0;
78 //! Returns in the vector Tolerance the parametric tolerance
79 //! for each of the 3 variables;
80 //! Tol is the tolerance used in 3d space.
81 Standard_EXPORT virtual void GetTolerance (math_Vector& Tolerance, const Standard_Real Tol) const = 0;
83 //! Returns in the vector InfBound the lowest values allowed
84 //! for each of the 3 variables.
85 //! Returns in the vector SupBound the greatest values allowed
86 //! for each of the 3 variables.
87 Standard_EXPORT virtual void GetBounds (math_Vector& InfBound, math_Vector& SupBound) const = 0;
89 //! Returns Standard_True if Sol is a zero of the function.
90 //! Tol is the tolerance used in 3d space.
91 Standard_EXPORT virtual Standard_Boolean IsSolution (const math_Vector& Sol, const Standard_Real Tol) = 0;
116 #endif // _Blend_SurfCurvFuncInv_HeaderFile