1 // Created on: 1997-09-11
2 // Created by: Roman BORISOV
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 _GeomConvert_ApproxCurve_HeaderFile
18 #define _GeomConvert_ApproxCurve_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Standard_Boolean.hxx>
25 #include <Standard_Real.hxx>
26 #include <GeomAbs_Shape.hxx>
27 #include <Standard_Integer.hxx>
28 #include <Standard_OStream.hxx>
29 class Geom_BSplineCurve;
30 class Standard_OutOfRange;
31 class Standard_ConstructionError;
33 class Adaptor3d_HCurve;
36 //! A framework to convert a 3D curve to a 3D BSpline.
37 //! This is done by approximation to a BSpline curve within a given tolerance.
38 class GeomConvert_ApproxCurve
45 //! Constructs a curve approximation framework defined by -
46 //! - the conic Curve,
47 //! - the tolerance value Tol3d,
48 //! - the degree of continuity Order,
49 //! - the maximum number of segments
50 //! MaxSegments allowed in the resulting BSpline curve, and
51 //! - the highest degree MaxDeg which the
52 //! polynomial defining the BSpline curve may have.
53 Standard_EXPORT GeomConvert_ApproxCurve(const Handle(Geom_Curve)& Curve, const Standard_Real Tol3d, const GeomAbs_Shape Order, const Standard_Integer MaxSegments, const Standard_Integer MaxDegree);
55 //! Constructs a curve approximation framework defined by -
57 //! - the tolerance value Tol3d,
58 //! - the degree of continuity Order,
59 //! - the maximum number of segments
60 //! MaxSegments allowed in the resulting BSpline curve, and
61 //! - the highest degree MaxDeg which the
62 //! polynomial defining the BSpline curve may have.
63 Standard_EXPORT GeomConvert_ApproxCurve(const Handle(Adaptor3d_HCurve)& Curve, const Standard_Real Tol3d, const GeomAbs_Shape Order, const Standard_Integer MaxSegments, const Standard_Integer MaxDegree);
65 //! Returns the BSpline curve resulting from the approximation algorithm.
66 Standard_EXPORT Handle(Geom_BSplineCurve) Curve() const;
68 //! returns Standard_True if the approximation has
69 //! been done within requiered tolerance
70 Standard_EXPORT Standard_Boolean IsDone() const;
72 //! Returns Standard_True if the approximation did come out
73 //! with a result that is not NECESSARELY within the required tolerance
74 Standard_EXPORT Standard_Boolean HasResult() const;
76 //! Returns the greatest distance between a point on the
77 //! source conic and the BSpline curve resulting from the
78 //! approximation. (>0 when an approximation
79 //! has been done, 0 if no approximation)
80 Standard_EXPORT Standard_Real MaxError() const;
82 //! Print on the stream o information about the object
83 Standard_EXPORT void Dump (Standard_OStream& o) const;
97 //! Converts a curve to B-spline
98 Standard_EXPORT void Approximate (const Handle(Adaptor3d_HCurve)& theCurve, const Standard_Real theTol3d, const GeomAbs_Shape theOrder, const Standard_Integer theMaxSegments, const Standard_Integer theMaxDegree);
101 Standard_Boolean myIsDone;
102 Standard_Boolean myHasResult;
103 Handle(Geom_BSplineCurve) myBSplCurve;
104 Standard_Real myMaxError;
115 #endif // _GeomConvert_ApproxCurve_HeaderFile