1 // Created on: 1997-02-12
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_CurvPointFuncInv_HeaderFile
18 #define _Blend_CurvPointFuncInv_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>
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 point of the curve.
37 //! The vector <X> used in Value, Values and Derivatives
38 //! methods has to be the vector of the parametric
39 //! coordinates w, U, V where w is the parameter on the
40 //! guide line, U,V are the parametric coordinates of a
41 //! point on the partner surface.
42 class Blend_CurvPointFuncInv : public math_FunctionSetWithDerivatives
50 Standard_EXPORT Standard_Integer NbVariables() const;
52 //! returns the number of equations of the function.
53 Standard_EXPORT virtual Standard_Integer NbEquations() const = 0;
55 //! computes the values <F> of the Functions for the
57 //! Returns True if the computation was done successfully,
59 Standard_EXPORT virtual Standard_Boolean Value (const math_Vector& X, math_Vector& F) = 0;
61 //! returns the values <D> of the derivatives for the
63 //! Returns True if the computation was done successfully,
65 Standard_EXPORT virtual Standard_Boolean Derivatives (const math_Vector& X, math_Matrix& D) = 0;
67 //! returns the values <F> of the functions and the derivatives
68 //! <D> for the variable <X>.
69 //! Returns True if the computation was done successfully,
71 Standard_EXPORT virtual Standard_Boolean Values (const math_Vector& X, math_Vector& F, math_Matrix& D) = 0;
73 //! Set the Point on which a solution has to be found.
74 Standard_EXPORT virtual void Set (const gp_Pnt& P) = 0;
76 //! Returns in the vector Tolerance the parametric tolerance
77 //! for each of the 3 variables;
78 //! Tol is the tolerance used in 3d space.
79 Standard_EXPORT virtual void GetTolerance (math_Vector& Tolerance, const Standard_Real Tol) const = 0;
81 //! Returns in the vector InfBound the lowest values allowed
82 //! for each of the 3 variables.
83 //! Returns in the vector SupBound the greatest values allowed
84 //! for each of the 3 variables.
85 Standard_EXPORT virtual void GetBounds (math_Vector& InfBound, math_Vector& SupBound) const = 0;
87 //! Returns Standard_True if Sol is a zero of the function.
88 //! Tol is the tolerance used in 3d space.
89 Standard_EXPORT virtual Standard_Boolean IsSolution (const math_Vector& Sol, const Standard_Real Tol) = 0;
114 #endif // _Blend_CurvPointFuncInv_HeaderFile