include/opencascade/HLRBRep_BCurveTool.hxx

0001 // Created on: 1995-07-17
0002 // Created by: Modelistation
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 _HLRBRep_BCurveTool_HeaderFile
0018 #define _HLRBRep_BCurveTool_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <GeomAbs_Shape.hxx>
0025 #include <Standard_Integer.hxx>
0026 #include <TColStd_Array1OfReal.hxx>
0027 #include <gp_Pnt.hxx>
0028 #include <gp_Vec.hxx>
0029 #include <GeomAbs_CurveType.hxx>
0030 #include <gp_Lin.hxx>
0031 #include <gp_Circ.hxx>
0032 #include <gp_Elips.hxx>
0033 #include <gp_Hypr.hxx>
0034 #include <gp_Parab.hxx>
0035 #include <TColgp_Array1OfPnt.hxx>
0036 class BRepAdaptor_Curve;
0037 class gp_Pnt;
0038 class gp_Vec;
0039 class Geom_BezierCurve;
0040 class Geom_BSplineCurve;
0041
0042
0043
0044 class HLRBRep_BCurveTool
0045 {
0046 public:
0047
0048   DEFINE_STANDARD_ALLOC
0049
0050
0051     static Standard_Real FirstParameter (const BRepAdaptor_Curve& C);
0052
0053     static Standard_Real LastParameter (const BRepAdaptor_Curve& C);
0054
0055     static GeomAbs_Shape Continuity (const BRepAdaptor_Curve& C);
0056
0057   //! Returns  the number  of  intervals for  continuity
0058   //! <S>. May be one if Continuity(myclass) >= <S>
0059     static Standard_Integer NbIntervals (const BRepAdaptor_Curve& C, const GeomAbs_Shape S);
0060
0061   //! Stores in <T> the  parameters bounding the intervals
0062   //! of continuity <S>.
0063   //!
0064   //! The array must provide  enough room to  accommodate
0065   //! for the parameters. i.e. T.Length() > NbIntervals()
0066     static void Intervals (const BRepAdaptor_Curve& C, TColStd_Array1OfReal& T, const GeomAbs_Shape S);
0067
0068     static Standard_Boolean IsClosed (const BRepAdaptor_Curve& C);
0069
0070     static Standard_Boolean IsPeriodic (const BRepAdaptor_Curve& C);
0071
0072     static Standard_Real Period (const BRepAdaptor_Curve& C);
0073
0074   //! Computes the point of parameter U on the curve.
0075     static gp_Pnt Value (const BRepAdaptor_Curve& C, const Standard_Real U);
0076
0077   //! Computes the point of parameter U on the curve.
0078     static void D0 (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P);
0079
0080   //! Computes the point of parameter U on the curve with its
0081   //! first derivative.
0082   //! Raised if the continuity of the current interval
0083   //! is not C1.
0084     static void D1 (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P, gp_Vec& V);
0085
0086
0087   //! Returns the point P of parameter U, the first and second
0088   //! derivatives V1 and V2.
0089   //! Raised if the continuity of the current interval
0090   //! is not C2.
0091     static void D2 (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2);
0092
0093
0094   //! Returns the point P of parameter U, the first, the second
0095   //! and the third derivative.
0096   //! Raised if the continuity of the current interval
0097   //! is not C3.
0098     static void D3 (const BRepAdaptor_Curve& C, const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3);
0099
0100
0101   //! The returned vector gives the value of the derivative for the
0102   //! order of derivation N.
0103   //! Raised if the continuity of the current interval
0104   //! is not CN.
0105   //! Raised if N < 1.
0106     static gp_Vec DN (const BRepAdaptor_Curve& C, const Standard_Real U, const Standard_Integer N);
0107
0108   //! Returns the parametric  resolution corresponding
0109   //! to the real space resolution <R3d>.
0110     static Standard_Real Resolution (const BRepAdaptor_Curve& C, const Standard_Real R3d);
0111
0112   //! Returns  the  type of the   curve  in the  current
0113   //! interval :   Line,   Circle,   Ellipse, Hyperbola,
0114   //! Parabola, BezierCurve, BSplineCurve, OtherCurve.
0115     static GeomAbs_CurveType GetType (const BRepAdaptor_Curve& C);
0116
0117     static gp_Lin Line (const BRepAdaptor_Curve& C);
0118
0119     static gp_Circ Circle (const BRepAdaptor_Curve& C);
0120
0121     static gp_Elips Ellipse (const BRepAdaptor_Curve& C);
0122
0123     static gp_Hypr Hyperbola (const BRepAdaptor_Curve& C);
0124
0125     static gp_Parab Parabola (const BRepAdaptor_Curve& C);
0126
0127   Standard_EXPORT static Handle(Geom_BezierCurve) Bezier (const BRepAdaptor_Curve& C);
0128
0129   Standard_EXPORT static Handle(Geom_BSplineCurve) BSpline (const BRepAdaptor_Curve& C);
0130
0131     static Standard_Integer Degree (const BRepAdaptor_Curve& C);
0132
0133     static Standard_Boolean IsRational (const BRepAdaptor_Curve& C);
0134
0135     static Standard_Integer NbPoles (const BRepAdaptor_Curve& C);
0136
0137     static Standard_Integer NbKnots (const BRepAdaptor_Curve& C);
0138
0139   Standard_EXPORT static void Poles (const BRepAdaptor_Curve& C, TColgp_Array1OfPnt& T);
0140
0141   Standard_EXPORT static void PolesAndWeights (const BRepAdaptor_Curve& C, TColgp_Array1OfPnt& T, TColStd_Array1OfReal& W);
0142
0143   Standard_EXPORT static Standard_Integer NbSamples (const BRepAdaptor_Curve& C, const Standard_Real U0, const Standard_Real U1);
0144
0145
0146
0147
0148 protected:
0149
0150
0151
0152
0153
0154 private:
0155
0156
0157
0158
0159
0160 };
0161
0162
0163 #include <HLRBRep_BCurveTool.lxx>
0164
0165
0166
0167
0168
0169 #endif // _HLRBRep_BCurveTool_HeaderFile