include/opencascade/GeomFill_CorrectedFrenet.hxx

0001 // Created on: 1997-12-19
0002 // Created by: Philippe MANGIN
0003 // Copyright (c) 1997-1999 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 _GeomFill_CorrectedFrenet_HeaderFile
0018 #define _GeomFill_CorrectedFrenet_HeaderFile
0019
0020 #include <Standard.hxx>
0021
0022 #include <TColStd_HArray1OfReal.hxx>
0023 #include <TColgp_HArray1OfVec.hxx>
0024 #include <GeomFill_TrihedronLaw.hxx>
0025 #include <Standard_Real.hxx>
0026 #include <TColStd_SequenceOfReal.hxx>
0027 #include <TColgp_SequenceOfVec.hxx>
0028 #include <Standard_Integer.hxx>
0029 #include <GeomAbs_Shape.hxx>
0030 #include <TColStd_Array1OfReal.hxx>
0031 #include <GeomFill_Trihedron.hxx>
0032 class GeomFill_Frenet;
0033 class Law_Function;
0034
0035 class GeomFill_CorrectedFrenet;
0036 DEFINE_STANDARD_HANDLE(GeomFill_CorrectedFrenet, GeomFill_TrihedronLaw)
0037
0038 //! Defined an Corrected Frenet  Trihedron  Law It is
0039 //! like Frenet with an Torsion's minimization
0040 class GeomFill_CorrectedFrenet : public GeomFill_TrihedronLaw
0041 {
0042
0043 public:
0044
0045
0046   Standard_EXPORT GeomFill_CorrectedFrenet();
0047
0048   Standard_EXPORT GeomFill_CorrectedFrenet(const Standard_Boolean ForEvaluation);
0049
0050   Standard_EXPORT virtual Handle(GeomFill_TrihedronLaw) Copy() const Standard_OVERRIDE;
0051
0052   //! initialize curve of frenet law
0053   //! @return Standard_True in case if execution end correctly
0054   Standard_EXPORT virtual Standard_Boolean SetCurve (const Handle(Adaptor3d_Curve)& C) Standard_OVERRIDE;
0055
0056   Standard_EXPORT virtual void SetInterval (const Standard_Real First, const Standard_Real Last) Standard_OVERRIDE;
0057
0058   //! compute Triedrhon on curve at parameter <Param>
0059   Standard_EXPORT virtual Standard_Boolean D0 (const Standard_Real Param, gp_Vec& Tangent, gp_Vec& Normal, gp_Vec& BiNormal) Standard_OVERRIDE;
0060
0061   //! compute Triedrhon and  derivative Trihedron  on curve
0062   //! at parameter <Param>
0063   //! Warning : It used only for C1 or C2 approximation
0064   Standard_EXPORT virtual Standard_Boolean D1 (const Standard_Real Param, gp_Vec& Tangent, gp_Vec& DTangent, gp_Vec& Normal, gp_Vec& DNormal, gp_Vec& BiNormal, gp_Vec& DBiNormal) Standard_OVERRIDE;
0065
0066   //! compute  Trihedron on curve
0067   //! first and seconde  derivatives.
0068   //! Warning : It used only for C2 approximation
0069   Standard_EXPORT virtual Standard_Boolean D2 (const Standard_Real Param, gp_Vec& Tangent, gp_Vec& DTangent, gp_Vec& D2Tangent, gp_Vec& Normal, gp_Vec& DNormal, gp_Vec& D2Normal, gp_Vec& BiNormal, gp_Vec& DBiNormal, gp_Vec& D2BiNormal) Standard_OVERRIDE;
0070
0071   //! Returns  the number  of  intervals for  continuity
0072   //! <S>.
0073   //! May be one if Continuity(me) >= <S>
0074   Standard_EXPORT virtual Standard_Integer NbIntervals (const GeomAbs_Shape S) const Standard_OVERRIDE;
0075
0076   //! Stores in <T> the  parameters bounding the intervals
0077   //! of continuity <S>.
0078   //!
0079   //! The array must provide  enough room to  accommodate
0080   //! for the parameters. i.e. T.Length() > NbIntervals()
0081   Standard_EXPORT virtual void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const Standard_OVERRIDE;
0082
0083   //! Tries to define the best trihedron mode
0084   //! for the curve. It can be:
0085   //! - Frenet
0086   //! - CorrectedFrenet
0087   //! - DiscreteTrihedron
0088   //! Warning: the CorrectedFrenet must be constructed
0089   //! with option ForEvaluation = True,
0090   //! the curve must be set by method SetCurve.
0091   Standard_EXPORT GeomFill_Trihedron EvaluateBestMode();
0092
0093   //! Get average value of Tangent(t) and Normal(t) it is usfull to
0094   //! make fast approximation of rational  surfaces.
0095   Standard_EXPORT virtual void GetAverageLaw (gp_Vec& ATangent, gp_Vec& ANormal, gp_Vec& ABiNormal) Standard_OVERRIDE;
0096
0097   //! Say if the law is Constant.
0098   Standard_EXPORT virtual Standard_Boolean IsConstant() const Standard_OVERRIDE;
0099
0100   //! Return True.
0101   Standard_EXPORT virtual Standard_Boolean IsOnlyBy3dCurve() const Standard_OVERRIDE;
0102
0103
0104
0105
0106   DEFINE_STANDARD_RTTIEXT(GeomFill_CorrectedFrenet,GeomFill_TrihedronLaw)
0107
0108 protected:
0109
0110
0111
0112
0113 private:
0114
0115
0116   Standard_EXPORT void Init();
0117
0118   //! Computes BSpline representation of Normal evolution at one
0119   //! interval of continuity of Frenet. Returns True if FuncInt = 0
0120   Standard_EXPORT Standard_Boolean InitInterval (const Standard_Real First, const Standard_Real Last, const Standard_Real Step, Standard_Real& startAng, gp_Vec& prevTangent, gp_Vec& prevNormal, gp_Vec& aT, gp_Vec& aN, Handle(Law_Function)& FuncInt, TColStd_SequenceOfReal& SeqPoles, TColStd_SequenceOfReal& SeqAngle, TColgp_SequenceOfVec& SeqTangent, TColgp_SequenceOfVec& SeqNormal) const;
0121
0122   //! Computes angle of Normal evolution of Frenet between any two points on the curve.
0123   Standard_EXPORT Standard_Real CalcAngleAT (const gp_Vec& Tangent, const gp_Vec& Normal, const gp_Vec& prevTangent, const gp_Vec& prevNormal) const;
0124
0125   //! Get corrected value of angle of Normal evolution of Frenet
0126   Standard_EXPORT Standard_Real GetAngleAT (const Standard_Real P) const;
0127
0128   Handle(GeomFill_Frenet) frenet;
0129   Handle(Law_Function) EvolAroundT;
0130   Handle(Law_Function) TLaw;
0131   gp_Vec AT;
0132   gp_Vec AN;
0133   Standard_Boolean isFrenet;
0134   Standard_Boolean myForEvaluation;
0135   Handle(TColStd_HArray1OfReal) HArrPoles;
0136   Handle(TColStd_HArray1OfReal) HArrAngle;
0137   Handle(TColgp_HArray1OfVec) HArrTangent;
0138   Handle(TColgp_HArray1OfVec) HArrNormal;
0139
0140
0141 };
0142
0143
0144
0145
0146
0147
0148
0149 #endif // _GeomFill_CorrectedFrenet_HeaderFile