1 // Created on: 1993-03-31
2 // Created by: Bruno DUMORTIER
3 // Copyright (c) 1993-1999 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 _Adaptor3d_Curve_HeaderFile
18 #define _Adaptor3d_Curve_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Standard_Real.hxx>
25 #include <GeomAbs_Shape.hxx>
26 #include <Standard_Integer.hxx>
27 #include <TColStd_Array1OfReal.hxx>
28 #include <Standard_Boolean.hxx>
29 #include <GeomAbs_CurveType.hxx>
30 class Standard_OutOfRange;
31 class Standard_NoSuchObject;
32 class Standard_DomainError;
33 class Adaptor3d_HCurve;
41 class Geom_BezierCurve;
42 class Geom_BSplineCurve;
43 class Geom_OffsetCurve;
46 //! Root class for 3D curves on which geometric
48 //! An adapted curve is an interface between the
49 //! services provided by a curve and those required of
50 //! the curve by algorithms which use it.
51 //! Two derived concrete classes are provided:
52 //! - GeomAdaptor_Curve for a curve from the Geom package
53 //! - Adaptor3d_CurveOnSurface for a curve lying on
54 //! a surface from the Geom package.
56 //! Polynomial coefficients of BSpline curves used for their evaluation are
57 //! cached for better performance. Therefore these evaluations are not
58 //! thread-safe and parallel evaluations need to be prevented.
66 Standard_EXPORT virtual Standard_Real FirstParameter() const;
68 Standard_EXPORT virtual Standard_Real LastParameter() const;
70 Standard_EXPORT virtual GeomAbs_Shape Continuity() const;
72 //! Returns the number of intervals for continuity
73 //! <S>. May be one if Continuity(me) >= <S>
74 Standard_EXPORT virtual Standard_Integer NbIntervals (const GeomAbs_Shape S) const;
76 //! Stores in <T> the parameters bounding the intervals
77 //! of continuity <S>.
79 //! The array must provide enough room to accomodate
80 //! for the parameters. i.e. T.Length() > NbIntervals()
81 Standard_EXPORT virtual void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const;
83 //! Returns a curve equivalent of <me> between
84 //! parameters <First> and <Last>. <Tol> is used to
85 //! test for 3d points confusion.
86 //! If <First> >= <Last>
87 Standard_EXPORT virtual Handle(Adaptor3d_HCurve) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const;
89 Standard_EXPORT virtual Standard_Boolean IsClosed() const;
91 Standard_EXPORT virtual Standard_Boolean IsPeriodic() const;
93 Standard_EXPORT virtual Standard_Real Period() const;
95 //! Computes the point of parameter U on the curve.
96 Standard_EXPORT virtual gp_Pnt Value (const Standard_Real U) const;
98 //! Computes the point of parameter U on the curve.
99 Standard_EXPORT virtual void D0 (const Standard_Real U, gp_Pnt& P) const;
101 //! Computes the point of parameter U on the curve with its
102 //! first derivative.
103 //! Raised if the continuity of the current interval
105 Standard_EXPORT virtual void D1 (const Standard_Real U, gp_Pnt& P, gp_Vec& V) const;
108 //! Returns the point P of parameter U, the first and second
109 //! derivatives V1 and V2.
110 //! Raised if the continuity of the current interval
112 Standard_EXPORT virtual void D2 (const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2) const;
115 //! Returns the point P of parameter U, the first, the second
116 //! and the third derivative.
117 //! Raised if the continuity of the current interval
119 Standard_EXPORT virtual void D3 (const Standard_Real U, gp_Pnt& P, gp_Vec& V1, gp_Vec& V2, gp_Vec& V3) const;
122 //! The returned vector gives the value of the derivative for the
123 //! order of derivation N.
124 //! Raised if the continuity of the current interval
127 Standard_EXPORT virtual gp_Vec DN (const Standard_Real U, const Standard_Integer N) const;
129 //! Returns the parametric resolution corresponding
130 //! to the real space resolution <R3d>.
131 Standard_EXPORT virtual Standard_Real Resolution (const Standard_Real R3d) const;
133 //! Returns the type of the curve in the current
134 //! interval : Line, Circle, Ellipse, Hyperbola,
135 //! Parabola, BezierCurve, BSplineCurve, OtherCurve.
136 Standard_EXPORT virtual GeomAbs_CurveType GetType() const;
138 Standard_EXPORT virtual gp_Lin Line() const;
140 Standard_EXPORT virtual gp_Circ Circle() const;
142 Standard_EXPORT virtual gp_Elips Ellipse() const;
144 Standard_EXPORT virtual gp_Hypr Hyperbola() const;
146 Standard_EXPORT virtual gp_Parab Parabola() const;
148 Standard_EXPORT virtual Standard_Integer Degree() const;
150 Standard_EXPORT virtual Standard_Boolean IsRational() const;
152 Standard_EXPORT virtual Standard_Integer NbPoles() const;
154 Standard_EXPORT virtual Standard_Integer NbKnots() const;
156 Standard_EXPORT virtual Handle(Geom_BezierCurve) Bezier() const;
158 Standard_EXPORT virtual Handle(Geom_BSplineCurve) BSpline() const;
160 Standard_EXPORT virtual Handle(Geom_OffsetCurve) OffsetCurve() const;
162 Standard_EXPORT virtual ~Adaptor3d_Curve();
187 #endif // _Adaptor3d_Curve_HeaderFile