1 // Created on: 1993-06-03
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 _Geom2dAdaptor_Curve_HeaderFile
18 #define _Geom2dAdaptor_Curve_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <GeomAbs_CurveType.hxx>
25 #include <Standard_Real.hxx>
26 #include <BSplCLib_Cache.hxx>
27 #include <Adaptor2d_Curve2d.hxx>
28 #include <GeomAbs_Shape.hxx>
29 #include <Standard_Integer.hxx>
30 #include <TColStd_Array1OfReal.hxx>
31 #include <Standard_Boolean.hxx>
32 #include <Geom2dEvaluator_Curve.hxx>
35 class Adaptor2d_HCurve2d;
36 class Standard_NoSuchObject;
37 class Standard_ConstructionError;
38 class Standard_OutOfRange;
39 class Standard_DomainError;
47 class Geom2d_BezierCurve;
48 class Geom2d_BSplineCurve;
51 //! An interface between the services provided by any
52 //! curve from the package Geom2d and those required
53 //! of the curve by algorithms which use it.
54 class Geom2dAdaptor_Curve : public Adaptor2d_Curve2d
61 Standard_EXPORT Geom2dAdaptor_Curve();
63 Standard_EXPORT Geom2dAdaptor_Curve(const Handle(Geom2d_Curve)& C);
65 //! ConstructionError is raised if Ufirst>Ulast
66 Standard_EXPORT Geom2dAdaptor_Curve(const Handle(Geom2d_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast);
68 void Load (const Handle(Geom2d_Curve)& C);
70 //! ConstructionError is raised if Ufirst>Ulast
71 void Load (const Handle(Geom2d_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast);
73 const Handle(Geom2d_Curve)& Curve() const;
75 Standard_Real FirstParameter() const Standard_OVERRIDE;
77 Standard_Real LastParameter() const Standard_OVERRIDE;
79 Standard_EXPORT GeomAbs_Shape Continuity() const Standard_OVERRIDE;
81 //! If necessary, breaks the curve in intervals of
82 //! continuity <S>. And returns the number of
84 Standard_EXPORT Standard_Integer NbIntervals (const GeomAbs_Shape S) const Standard_OVERRIDE;
86 //! Stores in <T> the parameters bounding the intervals
87 //! of continuity <S>.
89 //! The array must provide enough room to accomodate
90 //! for the parameters. i.e. T.Length() > NbIntervals()
91 Standard_EXPORT void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const Standard_OVERRIDE;
93 //! Returns a curve equivalent of <me> between
94 //! parameters <First> and <Last>. <Tol> is used to
95 //! test for 3d points confusion.
96 //! If <First> >= <Last>
97 Standard_EXPORT Handle(Adaptor2d_HCurve2d) Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const Standard_OVERRIDE;
99 Standard_EXPORT Standard_Boolean IsClosed() const Standard_OVERRIDE;
101 Standard_EXPORT Standard_Boolean IsPeriodic() const Standard_OVERRIDE;
103 Standard_EXPORT Standard_Real Period() const Standard_OVERRIDE;
105 //! Computes the point of parameter U on the curve
106 Standard_EXPORT gp_Pnt2d Value (const Standard_Real U) const Standard_OVERRIDE;
108 //! Computes the point of parameter U.
109 Standard_EXPORT void D0 (const Standard_Real U, gp_Pnt2d& P) const Standard_OVERRIDE;
111 //! Computes the point of parameter U on the curve with its
112 //! first derivative.
113 //! Raised if the continuity of the current interval
115 Standard_EXPORT void D1 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V) const Standard_OVERRIDE;
118 //! Returns the point P of parameter U, the first and second
119 //! derivatives V1 and V2.
120 //! Raised if the continuity of the current interval
122 Standard_EXPORT void D2 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2) const Standard_OVERRIDE;
125 //! Returns the point P of parameter U, the first, the second
126 //! and the third derivative.
127 //! Raised if the continuity of the current interval
129 Standard_EXPORT void D3 (const Standard_Real U, gp_Pnt2d& P, gp_Vec2d& V1, gp_Vec2d& V2, gp_Vec2d& V3) const Standard_OVERRIDE;
132 //! The returned vector gives the value of the derivative for the
133 //! order of derivation N.
134 //! Raised if the continuity of the current interval
137 Standard_EXPORT gp_Vec2d DN (const Standard_Real U, const Standard_Integer N) const Standard_OVERRIDE;
139 //! returns the parametric resolution
140 Standard_EXPORT Standard_Real Resolution (const Standard_Real Ruv) const Standard_OVERRIDE;
142 GeomAbs_CurveType GetType() const Standard_OVERRIDE;
144 Standard_EXPORT gp_Lin2d Line() const Standard_OVERRIDE;
146 Standard_EXPORT gp_Circ2d Circle() const Standard_OVERRIDE;
148 Standard_EXPORT gp_Elips2d Ellipse() const Standard_OVERRIDE;
150 Standard_EXPORT gp_Hypr2d Hyperbola() const Standard_OVERRIDE;
152 Standard_EXPORT gp_Parab2d Parabola() const Standard_OVERRIDE;
154 Standard_EXPORT Standard_Integer Degree() const Standard_OVERRIDE;
156 Standard_EXPORT Standard_Boolean IsRational() const Standard_OVERRIDE;
158 Standard_EXPORT Standard_Integer NbPoles() const Standard_OVERRIDE;
160 Standard_EXPORT Standard_Integer NbKnots() const Standard_OVERRIDE;
162 Standard_EXPORT virtual Standard_Integer NbSamples() const Standard_OVERRIDE;
164 Standard_EXPORT Handle(Geom2d_BezierCurve) Bezier() const Standard_OVERRIDE;
166 Standard_EXPORT Handle(Geom2d_BSplineCurve) BSpline() const Standard_OVERRIDE;
179 Standard_EXPORT GeomAbs_Shape LocalContinuity (const Standard_Real U1, const Standard_Real U2) const;
181 Standard_EXPORT void load (const Handle(Geom2d_Curve)& C, const Standard_Real UFirst, const Standard_Real ULast);
183 //! Check theU relates to start or finish point of B-spline curve and return indices of span the point is located
184 Standard_Boolean IsBoundary(const Standard_Real theU, Standard_Integer& theSpanStart, Standard_Integer& theSpanFinish) const;
186 //! Rebuilds B-spline cache
187 //! \param theParameter the value on the knot axis which identifies the caching span
188 void RebuildCache (const Standard_Real theParameter) const;
191 Handle(Geom2d_Curve) myCurve;
192 GeomAbs_CurveType myTypeCurve;
193 Standard_Real myFirst;
194 Standard_Real myLast;
195 Handle(BSplCLib_Cache) myCurveCache; ///< Cached data for B-spline or Bezier curve
196 Handle(Geom2dEvaluator_Curve) myNestedEvaluator; ///< Calculates value of offset curve
202 #include <Geom2dAdaptor_Curve.lxx>
208 #endif // _Geom2dAdaptor_Curve_HeaderFile