1 // Created on: 1997-08-26
2 // Created by: Stepan MISHIN
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_ApproxSurface_HeaderFile
18 #define _GeomConvert_ApproxSurface_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_BSplineSurface;
30 class Standard_OutOfRange;
32 class Adaptor3d_HSurface;
35 //! A framework to convert a surface to a BSpline
36 //! surface. This is done by approximation to a BSpline
37 //! surface within a given tolerance.
38 class GeomConvert_ApproxSurface
45 //! Constructs a surface approximation framework defined by
47 //! - the tolerance value Tol3d
48 //! - the degree of continuity UContinuity, VContinuity
49 //! in the directions of the U and V parameters
50 //! - the highest degree MaxDegU, MaxDegV which
51 //! the polynomial defining the BSpline curve may
52 //! have in the directions of the U and V parameters
53 //! - the maximum number of segments MaxSegments
54 //! allowed in the resulting BSpline curve
55 //! - the index of precision PrecisCode.
56 Standard_EXPORT GeomConvert_ApproxSurface(const Handle(Geom_Surface)& Surf, const Standard_Real Tol3d, const GeomAbs_Shape UContinuity, const GeomAbs_Shape VContinuity, const Standard_Integer MaxDegU, const Standard_Integer MaxDegV, const Standard_Integer MaxSegments, const Standard_Integer PrecisCode);
58 //! Constructs a surface approximation framework defined by
60 //! - the tolerance value Tol3d
61 //! - the degree of continuity UContinuity, VContinuity
62 //! in the directions of the U and V parameters
63 //! - the highest degree MaxDegU, MaxDegV which
64 //! the polynomial defining the BSpline curve may
65 //! have in the directions of the U and V parameters
66 //! - the maximum number of segments MaxSegments
67 //! allowed in the resulting BSpline curve
68 //! - the index of precision PrecisCode.
69 Standard_EXPORT GeomConvert_ApproxSurface(const Handle(Adaptor3d_HSurface)& Surf, const Standard_Real Tol3d, const GeomAbs_Shape UContinuity, const GeomAbs_Shape VContinuity, const Standard_Integer MaxDegU, const Standard_Integer MaxDegV, const Standard_Integer MaxSegments, const Standard_Integer PrecisCode);
71 //! Returns the BSpline surface resulting from the approximation algorithm.
72 Standard_EXPORT Handle(Geom_BSplineSurface) Surface() const;
74 //! Returns Standard_True if the approximation has be done
75 Standard_EXPORT Standard_Boolean IsDone() const;
77 //! Returns true if the approximation did come out with a result that
78 //! is not NECESSARILY within the required tolerance or a result
79 //! that is not recognized with the wished continuities.
80 Standard_EXPORT Standard_Boolean HasResult() const;
82 //! Returns the greatest distance between a point on the
83 //! source conic surface and the BSpline surface
84 //! resulting from the approximation (>0 when an approximation
85 //! has been done, 0 if no approximation )
86 Standard_EXPORT Standard_Real MaxError() const;
88 //! Prints on the stream o informations on the current state of the object.
89 Standard_EXPORT void Dump (Standard_OStream& o) const;
103 //! Converts a surface to B-spline
104 Standard_EXPORT void Approximate (const Handle(Adaptor3d_HSurface)& theSurf, const Standard_Real theTol3d, const GeomAbs_Shape theUContinuity, const GeomAbs_Shape theVContinuity, const Standard_Integer theMaxDegU, const Standard_Integer theMaxDegV, const Standard_Integer theMaxSegments, const Standard_Integer thePrecisCode);
107 Standard_Boolean myIsDone;
108 Standard_Boolean myHasResult;
109 Handle(Geom_BSplineSurface) myBSplSurf;
110 Standard_Real myMaxError;
121 #endif // _GeomConvert_ApproxSurface_HeaderFile