1 // Created on: 1995-11-15 2 // Created by: Laurent BOURESCHE 3 // Copyright (c) 1995-1999 Matra Datavision 4 // Copyright (c) 1999-2014 OPEN CASCADE SAS 5 // 6 // This file is part of Open CASCADE Technology software library. 7 // 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. 13 // 14 // Alternatively, this file may be used under the terms of Open CASCADE 15 // commercial license or contractual agreement. 16 17 #ifndef _Law_BSpFunc_HeaderFile 18 #define _Law_BSpFunc_HeaderFile 19 20 #include <Standard.hxx> 21 #include <Standard_Type.hxx> 22 23 #include <Standard_Real.hxx> 24 #include <Law_Function.hxx> 25 #include <GeomAbs_Shape.hxx> 26 #include <Standard_Integer.hxx> 27 #include <TColStd_Array1OfReal.hxx> 28 class Law_BSpline; 29 class Standard_OutOfRange; 30 class Law_Function; 31 32 33 class Law_BSpFunc; 34 DEFINE_STANDARD_HANDLE(Law_BSpFunc, Law_Function) 35 36 //! Law Function based on a BSpline curve 1d. Package 37 //! methods and classes are implemented in package Law 38 //! to construct the basis curve with several 39 //! constraints. 40 class Law_BSpFunc : public Law_Function 41 { 42 43 public: 44 45 Standard_EXPORT Law_BSpFunc(); 46 47 Standard_EXPORT Law_BSpFunc(const Handle(Law_BSpline)& C, const Standard_Real First, const Standard_Real Last); 48 49 Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE; 50 51 //! Returns the number of intervals for continuity 52 //! <S>. May be one if Continuity(me) >= <S> 53 Standard_EXPORT Standard_Integer NbIntervals (const GeomAbs_Shape S) const Standard_OVERRIDE; 54 55 //! Stores in <T> the parameters bounding the intervals of continuity <S>. 56 //! The array must provide enough room to accommodate for the parameters, i.e. T.Length() > NbIntervals() 57 Standard_EXPORT void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const Standard_OVERRIDE; 58 59 Standard_EXPORT Standard_Real Value (const Standard_Real X) Standard_OVERRIDE; 60 61 Standard_EXPORT void D1 (const Standard_Real X, Standard_Real& F, Standard_Real& D) Standard_OVERRIDE; 62 63 Standard_EXPORT void D2 (const Standard_Real X, Standard_Real& F, Standard_Real& D, Standard_Real& D2) Standard_OVERRIDE; 64 65 //! Returns a law equivalent of <me> between 66 //! parameters <First> and <Last>. <Tol> is used to 67 //! test for 3d points confusion. 68 //! It is usfule to determines the derivatives 69 //! in these values <First> and <Last> if 70 //! the Law is not Cn. 71 Standard_EXPORT Handle(Law_Function) Trim (const Standard_Real PFirst, const Standard_Real PLast, const Standard_Real Tol) const Standard_OVERRIDE; 72 73 Standard_EXPORT void Bounds (Standard_Real& PFirst, Standard_Real& PLast) Standard_OVERRIDE; 74 75 Standard_EXPORT Handle(Law_BSpline) Curve() const; 76 77 Standard_EXPORT void SetCurve (const Handle(Law_BSpline)& C); 78 79 DEFINE_STANDARD_RTTIEXT(Law_BSpFunc,Law_Function) 80 81 private: 82 83 Handle(Law_BSpline) curv; 84 Standard_Real first; 85 Standard_Real last; 86 87 }; 88 89 #endif // _Law_BSpFunc_HeaderFile 90