1 // Created on: 1997-12-02
2 // Created by: Philippe MANGIN
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 _GeomFill_TrihedronLaw_HeaderFile
18 #define _GeomFill_TrihedronLaw_HeaderFile
20 #include <Adaptor3d_Curve.hxx>
21 #include <GeomFill_PipeError.hxx>
22 #include <GeomAbs_Shape.hxx>
23 #include <TColStd_Array1OfReal.hxx>
25 class Standard_OutOfRange;
26 class Standard_NotImplemented;
30 class GeomFill_TrihedronLaw;
31 DEFINE_STANDARD_HANDLE(GeomFill_TrihedronLaw, Standard_Transient)
33 //! To define Trihedron along one Curve
34 class GeomFill_TrihedronLaw : public Standard_Transient
40 Standard_EXPORT virtual void SetCurve (const Handle(Adaptor3d_Curve)& C);
42 Standard_EXPORT virtual Handle(GeomFill_TrihedronLaw) Copy() const = 0;
44 //! Give a status to the Law
45 //! Returns PipeOk (default implementation)
46 Standard_EXPORT virtual GeomFill_PipeError ErrorStatus() const;
48 //! compute Triedrhon on curve at parameter <Param>
49 Standard_EXPORT virtual Standard_Boolean D0 (const Standard_Real Param, gp_Vec& Tangent, gp_Vec& Normal, gp_Vec& BiNormal) = 0;
51 //! compute Triedrhon and derivative Trihedron on curve
52 //! at parameter <Param>
53 //! Warning : It used only for C1 or C2 approximation
54 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);
56 //! compute Trihedron on curve
57 //! first and seconde derivatives.
58 //! Warning : It used only for C2 approximation
59 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);
61 //! Returns the number of intervals for continuity
63 //! May be one if Continuity(me) >= <S>
64 Standard_EXPORT virtual Standard_Integer NbIntervals (const GeomAbs_Shape S) const = 0;
66 //! Stores in <T> the parameters bounding the intervals
67 //! of continuity <S>.
69 //! The array must provide enough room to accommodate
70 //! for the parameters. i.e. T.Length() > NbIntervals()
71 Standard_EXPORT virtual void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const = 0;
73 //! Sets the bounds of the parametric interval on
75 //! This determines the derivatives in these values if the
76 //! function is not Cn.
77 Standard_EXPORT virtual void SetInterval (const Standard_Real First, const Standard_Real Last);
79 //! Gets the bounds of the parametric interval on
81 Standard_EXPORT void GetInterval (Standard_Real& First, Standard_Real& Last);
83 //! Get average value of M(t) and V(t) it is usfull to
84 //! make fast approximation of rational surfaces.
85 Standard_EXPORT virtual void GetAverageLaw (gp_Vec& ATangent, gp_Vec& ANormal, gp_Vec& ABiNormal) = 0;
87 //! Say if the law is Constant
88 Standard_EXPORT virtual Standard_Boolean IsConstant() const;
90 //! Say if the law is defined, only by the 3d Geometry of
92 //! Return False by Default.
93 Standard_EXPORT virtual Standard_Boolean IsOnlyBy3dCurve() const;
98 DEFINE_STANDARD_RTTIEXT(GeomFill_TrihedronLaw,Standard_Transient)
103 Handle(Adaptor3d_Curve) myCurve;
104 Handle(Adaptor3d_Curve) myTrimmed;
120 #endif // _GeomFill_TrihedronLaw_HeaderFile