1 // Created on: 1996-03-05
2 // Created by: Joelle CHAUVET
3 // Copyright (c) 1996-1999 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 _GeomPlate_MakeApprox_HeaderFile
18 #define _GeomPlate_MakeApprox_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Standard_Real.hxx>
25 #include <Standard_Integer.hxx>
26 #include <GeomAbs_Shape.hxx>
27 class GeomPlate_Surface;
28 class Geom_BSplineSurface;
29 class AdvApp2Var_Criterion;
33 //! Allows you to convert a GeomPlate surface into a BSpline.
34 class GeomPlate_MakeApprox
41 //! Converts SurfPlate into a Geom_BSplineSurface with
42 //! n Bezier pieces (n<=Nbmax) of degree <= dgmax
43 //! and an approximation error < Tol3d if possible
44 //! the criterion CritPlate is satisfied if possible
45 Standard_EXPORT GeomPlate_MakeApprox(const Handle(GeomPlate_Surface)& SurfPlate, const AdvApp2Var_Criterion& PlateCrit, const Standard_Real Tol3d, const Standard_Integer Nbmax, const Standard_Integer dgmax, const GeomAbs_Shape Continuity = GeomAbs_C1, const Standard_Real EnlargeCoeff = 1.1);
47 //! Converts SurfPlate into a Geom_BSplineSurface with
48 //! n Bezier pieces (n<=Nbmax) of degree <= dgmax
49 //! and an approximation error < Tol3d if possible
50 //! if CritOrder = -1 , no criterion is used
51 //! if CritOrder = 0 , a PlateG0Criterion is used with max value > 10*dmax
52 //! if CritOrder = 1 , a PlateG1Criterion is used with max value > 10*dmax
53 //! WARNING : for CritOrder = 0 or 1, only the constraints points of SurfPlate
54 //! are used to evaluate the value of the criterion
55 Standard_EXPORT GeomPlate_MakeApprox(const Handle(GeomPlate_Surface)& SurfPlate, const Standard_Real Tol3d, const Standard_Integer Nbmax, const Standard_Integer dgmax, const Standard_Real dmax, const Standard_Integer CritOrder = 0, const GeomAbs_Shape Continuity = GeomAbs_C1, const Standard_Real EnlargeCoeff = 1.1);
57 //! Returns the BSpline surface extracted from the
58 //! GeomPlate_MakeApprox object.
59 Standard_EXPORT Handle(Geom_BSplineSurface) Surface() const;
61 //! Returns the error in computation of the approximation
62 //! surface. This is the distance between the entire target
63 //! BSpline surface and the entire original surface
64 //! generated by BuildPlateSurface and converted by GeomPlate_Surface.
65 Standard_EXPORT Standard_Real ApproxError() const;
67 //! Returns the criterion error in computation of the
68 //! approximation surface. This is estimated relative to the
69 //! curve and point constraints only.
70 Standard_EXPORT Standard_Real CriterionError() const;
85 Handle(GeomPlate_Surface) myPlate;
86 Handle(Geom_BSplineSurface) mySurface;
87 Standard_Real myAppError;
88 Standard_Real myCritError;
99 #endif // _GeomPlate_MakeApprox_HeaderFile