include/opencascade/Law_BSpFunc.hxx

0001 // Created on: 1995-11-15
0002 // Created by: Laurent BOURESCHE
0003 // Copyright (c) 1995-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _Law_BSpFunc_HeaderFile
0018 #define _Law_BSpFunc_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_Type.hxx>
0022
0023 #include <Law_Function.hxx>
0024 #include <GeomAbs_Shape.hxx>
0025 #include <Standard_Integer.hxx>
0026 #include <TColStd_Array1OfReal.hxx>
0027 class Law_BSpline;
0028
0029 class Law_BSpFunc;
0030 DEFINE_STANDARD_HANDLE(Law_BSpFunc, Law_Function)
0031
0032 //! Law Function based on a BSpline curve 1d.  Package
0033 //! methods and classes are implemented in package Law
0034 //! to    construct  the  basis    curve with  several
0035 //! constraints.
0036 class Law_BSpFunc : public Law_Function
0037 {
0038
0039 public:
0040   Standard_EXPORT Law_BSpFunc();
0041
0042   Standard_EXPORT Law_BSpFunc(const Handle(Law_BSpline)& C,
0043                               const Standard_Real        First,
0044                               const Standard_Real        Last);
0045
0046   Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE;
0047
0048   //! Returns  the number  of  intervals for  continuity
0049   //! <S>. May be one if Continuity(me) >= <S>
0050   Standard_EXPORT Standard_Integer NbIntervals(const GeomAbs_Shape S) const Standard_OVERRIDE;
0051
0052   //! Stores in <T> the parameters bounding the intervals of continuity <S>.
0053   //! The array must provide enough room to accommodate for the parameters, i.e. T.Length() >
0054   //! NbIntervals()
0055   Standard_EXPORT void Intervals(TColStd_Array1OfReal& T,
0056                                  const GeomAbs_Shape   S) const Standard_OVERRIDE;
0057
0058   Standard_EXPORT Standard_Real Value(const Standard_Real X) Standard_OVERRIDE;
0059
0060   Standard_EXPORT void D1(const Standard_Real X,
0061                           Standard_Real&      F,
0062                           Standard_Real&      D) Standard_OVERRIDE;
0063
0064   Standard_EXPORT void D2(const Standard_Real X,
0065                           Standard_Real&      F,
0066                           Standard_Real&      D,
0067                           Standard_Real&      D2) Standard_OVERRIDE;
0068
0069   //! Returns a  law equivalent of  <me>  between
0070   //! parameters <First>  and <Last>. <Tol>  is used  to
0071   //! test for 3d points confusion.
0072   //! It is usfule to determines the derivatives
0073   //! in these values <First> and <Last> if
0074   //! the Law is not Cn.
0075   Standard_EXPORT Handle(Law_Function) Trim(const Standard_Real PFirst,
0076                                             const Standard_Real PLast,
0077                                             const Standard_Real Tol) const Standard_OVERRIDE;
0078
0079   Standard_EXPORT void Bounds(Standard_Real& PFirst, Standard_Real& PLast) Standard_OVERRIDE;
0080
0081   Standard_EXPORT Handle(Law_BSpline) Curve() const;
0082
0083   Standard_EXPORT void SetCurve(const Handle(Law_BSpline)& C);
0084
0085   DEFINE_STANDARD_RTTIEXT(Law_BSpFunc, Law_Function)
0086
0087 private:
0088   Handle(Law_BSpline) curv;
0089   Standard_Real       first;
0090   Standard_Real       last;
0091 };
0092
0093 #endif // _Law_BSpFunc_HeaderFile