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 //! Allows you to convert a GeomPlate surface into a BSpline.
0031 class GeomPlate_MakeApprox
0032 {
0033 public:
0034   DEFINE_STANDARD_ALLOC
0035
0036   //! Converts SurfPlate into a Geom_BSplineSurface with
0037   //! n Bezier pieces (n<=Nbmax) of degree <= dgmax
0038   //! and an approximation error < Tol3d if possible
0039   //! the criterion CritPlate is satisfied if possible
0040   Standard_EXPORT GeomPlate_MakeApprox(const Handle(GeomPlate_Surface)& SurfPlate,
0041                                        const AdvApp2Var_Criterion&      PlateCrit,
0042                                        const Standard_Real              Tol3d,
0043                                        const Standard_Integer           Nbmax,
0044                                        const Standard_Integer           dgmax,
0045                                        const GeomAbs_Shape              Continuity   = GeomAbs_C1,
0046                                        const Standard_Real              EnlargeCoeff = 1.1);
0047
0048   //! Converts SurfPlate into a Geom_BSplineSurface with
0049   //! n Bezier pieces (n<=Nbmax) of degree <= dgmax
0050   //! and an approximation error < Tol3d if possible
0051   //! if CritOrder = -1 , no criterion is used
0052   //! if CritOrder = 0 , a PlateG0Criterion is used with max value > 10*dmax
0053   //! if CritOrder = 1 , a PlateG1Criterion is used with max value > 10*dmax
0054   //! WARNING : for CritOrder = 0 or 1, only the constraints points of SurfPlate
0055   //! are used to evaluate the value of the criterion
0056   Standard_EXPORT GeomPlate_MakeApprox(const Handle(GeomPlate_Surface)& SurfPlate,
0057                                        const Standard_Real              Tol3d,
0058                                        const Standard_Integer           Nbmax,
0059                                        const Standard_Integer           dgmax,
0060                                        const Standard_Real              dmax,
0061                                        const Standard_Integer           CritOrder    = 0,
0062                                        const GeomAbs_Shape              Continuity   = GeomAbs_C1,
0063                                        const Standard_Real              EnlargeCoeff = 1.1);
0064
0065   //! Returns the BSpline surface extracted from the
0066   //! GeomPlate_MakeApprox object.
0067   Standard_EXPORT Handle(Geom_BSplineSurface) Surface() const;
0068
0069   //! Returns the error in computation of the approximation
0070   //! surface. This is the distance between the entire target
0071   //! BSpline surface and the entire original surface
0072   //! generated by BuildPlateSurface and converted by GeomPlate_Surface.
0073   Standard_EXPORT Standard_Real ApproxError() const;
0074
0075   //! Returns the criterion error in computation of the
0076   //! approximation surface. This is estimated relative to the
0077   //! curve and point constraints only.
0078   Standard_EXPORT Standard_Real CriterionError() const;
0079
0080 protected:
0081 private:
0082   Handle(GeomPlate_Surface)   myPlate;
0083   Handle(Geom_BSplineSurface) mySurface;
0084   Standard_Real               myAppError;
0085   Standard_Real               myCritError;
0086 };
0087
0088 #endif // _GeomPlate_MakeApprox_HeaderFile