include/opencascade/GeomPlate_MakeApprox.hxx

0001 // Created on: 1996-03-05
0002 // Created by: Joelle CHAUVET
0003 // Copyright (c) 1996-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _GeomPlate_MakeApprox_HeaderFile
0018 #define _GeomPlate_MakeApprox_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <Standard_Integer.hxx>
0025 #include <GeomAbs_Shape.hxx>
0026 class GeomPlate_Surface;
0027 class Geom_BSplineSurface;
0028 class AdvApp2Var_Criterion;
0029
0030
0031
0032 //! Allows you to convert a GeomPlate surface into a BSpline.
0033 class GeomPlate_MakeApprox
0034 {
0035 public:
0036
0037   DEFINE_STANDARD_ALLOC
0038
0039
0040   //! Converts SurfPlate into a Geom_BSplineSurface with
0041   //! n Bezier pieces (n<=Nbmax) of degree <= dgmax
0042   //! and an approximation error < Tol3d if possible
0043   //! the criterion CritPlate is satisfied if possible
0044   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);
0045
0046   //! Converts SurfPlate into a Geom_BSplineSurface with
0047   //! n Bezier pieces (n<=Nbmax) of degree <= dgmax
0048   //! and an approximation error < Tol3d if possible
0049   //! if CritOrder = -1 , no criterion is used
0050   //! if CritOrder = 0 , a PlateG0Criterion is used with max value > 10*dmax
0051   //! if CritOrder = 1 , a PlateG1Criterion is used with max value > 10*dmax
0052   //! WARNING : for CritOrder = 0 or 1, only the constraints points of SurfPlate
0053   //! are used to evaluate the value of the criterion
0054   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);
0055
0056   //! Returns the BSpline surface extracted from the
0057   //! GeomPlate_MakeApprox object.
0058   Standard_EXPORT Handle(Geom_BSplineSurface) Surface() const;
0059
0060   //! Returns the error in computation of the approximation
0061   //! surface. This is the distance between the entire target
0062   //! BSpline surface and the entire original surface
0063   //! generated by BuildPlateSurface and converted by GeomPlate_Surface.
0064   Standard_EXPORT Standard_Real ApproxError() const;
0065
0066   //! Returns the criterion error in computation of the
0067   //! approximation surface. This is estimated relative to the
0068   //! curve and point constraints only.
0069   Standard_EXPORT Standard_Real CriterionError() const;
0070
0071
0072
0073
0074 protected:
0075
0076
0077
0078
0079
0080 private:
0081
0082
0083
0084   Handle(GeomPlate_Surface) myPlate;
0085   Handle(Geom_BSplineSurface) mySurface;
0086   Standard_Real myAppError;
0087   Standard_Real myCritError;
0088
0089
0090 };
0091
0092
0093
0094
0095
0096
0097
0098 #endif // _GeomPlate_MakeApprox_HeaderFile