include/opencascade/Law_Linear.hxx

0001 // Created on: 1995-01-12
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_Linear_HeaderFile
0018 #define _Law_Linear_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
0028
0029 class Law_Linear;
0030 DEFINE_STANDARD_HANDLE(Law_Linear, Law_Function)
0031
0032 //! Describes an linear evolution law.
0033 class Law_Linear : public Law_Function
0034 {
0035
0036 public:
0037
0038
0039   //! Constructs an empty linear evolution law.
0040   Standard_EXPORT Law_Linear();
0041
0042
0043   //! Defines this linear evolution law by assigning both:
0044   //! -   the bounds Pdeb and Pfin of the parameter, and
0045   //! -   the values Valdeb and Valfin of the function at these
0046   //! two parametric bounds.
0047   Standard_EXPORT void Set (const Standard_Real Pdeb, const Standard_Real Valdeb, const Standard_Real Pfin, const Standard_Real Valfin);
0048
0049   //! Returns GeomAbs_CN
0050   Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE;
0051
0052   //! Returns  1
0053   Standard_EXPORT Standard_Integer NbIntervals (const GeomAbs_Shape S) const Standard_OVERRIDE;
0054
0055   Standard_EXPORT void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const Standard_OVERRIDE;
0056
0057   //! Returns the value of this function at the point of parameter X.
0058   Standard_EXPORT Standard_Real Value (const Standard_Real X) Standard_OVERRIDE;
0059
0060
0061   //! Returns the value F and the first derivative D of this
0062   //! function at the point of parameter X.
0063   Standard_EXPORT void D1 (const Standard_Real X, Standard_Real& F, Standard_Real& D) Standard_OVERRIDE;
0064
0065   //! Returns the value, first and second derivatives
0066   //! at parameter X.
0067   Standard_EXPORT void D2 (const Standard_Real X, Standard_Real& F, Standard_Real& D, 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, const Standard_Real PLast, const Standard_Real Tol) const Standard_OVERRIDE;
0076
0077   //! Returns the parametric bounds of the function.
0078   Standard_EXPORT void Bounds (Standard_Real& PFirst, Standard_Real& PLast) Standard_OVERRIDE;
0079
0080
0081
0082
0083   DEFINE_STANDARD_RTTIEXT(Law_Linear,Law_Function)
0084
0085 protected:
0086
0087
0088
0089
0090 private:
0091
0092
0093   Standard_Real valdeb;
0094   Standard_Real valfin;
0095   Standard_Real pdeb;
0096   Standard_Real pfin;
0097
0098
0099 };
0100
0101
0102
0103
0104
0105
0106
0107 #endif // _Law_Linear_HeaderFile