// Created on: 1997-06-25 // Created by: Philippe MANGIN // Copyright (c) 1997-1999 Matra Datavision // Copyright (c) 1999-2014 OPEN CASCADE SAS // // This file is part of Open CASCADE Technology software library. // // This library is free software; you can redistribute it and/or modify it under // the terms of the GNU Lesser General Public License version 2.1 as published // by the Free Software Foundation, with special exception defined in the file // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT // distribution for complete text of the license and disclaimer of any warranty. // // Alternatively, this file may be used under the terms of Open CASCADE // commercial license or contractual agreement. #ifndef _Approx_SweepFunction_HeaderFile #define _Approx_SweepFunction_HeaderFile #include #include #include #include #include #include #include #include #include #include #include class gp_Pnt; class Approx_SweepFunction; DEFINE_STANDARD_HANDLE(Approx_SweepFunction, Standard_Transient) //! defined the function used by SweepApproximation to //! perform sweeping application. class Approx_SweepFunction : public Standard_Transient { public: //! compute the section for v = param Standard_EXPORT virtual Standard_Boolean D0(const Standard_Real Param, const Standard_Real First, const Standard_Real Last, TColgp_Array1OfPnt& Poles, TColgp_Array1OfPnt2d& Poles2d, TColStd_Array1OfReal& Weigths) = 0; //! compute the first derivative in v direction of the //! section for v = param //! Warning : It used only for C1 or C2 approximation Standard_EXPORT virtual Standard_Boolean D1(const Standard_Real Param, const Standard_Real First, const Standard_Real Last, TColgp_Array1OfPnt& Poles, TColgp_Array1OfVec& DPoles, TColgp_Array1OfPnt2d& Poles2d, TColgp_Array1OfVec2d& DPoles2d, TColStd_Array1OfReal& Weigths, TColStd_Array1OfReal& DWeigths); //! compute the second derivative in v direction of the //! section for v = param //! Warning : It used only for C2 approximation Standard_EXPORT virtual Standard_Boolean D2(const Standard_Real Param, const Standard_Real First, const Standard_Real Last, TColgp_Array1OfPnt& Poles, TColgp_Array1OfVec& DPoles, TColgp_Array1OfVec& D2Poles, TColgp_Array1OfPnt2d& Poles2d, TColgp_Array1OfVec2d& DPoles2d, TColgp_Array1OfVec2d& D2Poles2d, TColStd_Array1OfReal& Weigths, TColStd_Array1OfReal& DWeigths, TColStd_Array1OfReal& D2Weigths); //! get the number of 2d curves to approximate. Standard_EXPORT virtual Standard_Integer Nb2dCurves() const = 0; //! get the format of an section Standard_EXPORT virtual void SectionShape(Standard_Integer& NbPoles, Standard_Integer& NbKnots, Standard_Integer& Degree) const = 0; //! get the Knots of the section Standard_EXPORT virtual void Knots(TColStd_Array1OfReal& TKnots) const = 0; //! get the Multplicities of the section Standard_EXPORT virtual void Mults(TColStd_Array1OfInteger& TMults) const = 0; //! Returns if the sections are rational or not Standard_EXPORT virtual Standard_Boolean IsRational() const = 0; //! Returns the number of intervals for continuity //! . //! May be one if Continuity(me) >= Standard_EXPORT virtual Standard_Integer NbIntervals(const GeomAbs_Shape S) const = 0; //! Stores in the parameters bounding the intervals //! of continuity . //! //! The array must provide enough room to accommodate //! for the parameters. i.e. T.Length() > NbIntervals() Standard_EXPORT virtual void Intervals(TColStd_Array1OfReal& T, const GeomAbs_Shape S) const = 0; //! Sets the bounds of the parametric interval on //! the fonction //! This determines the derivatives in these values if the //! function is not Cn. Standard_EXPORT virtual void SetInterval(const Standard_Real First, const Standard_Real Last) = 0; //! Returns the resolutions in the sub-space 2d //! This information is usfull to find an good tolerance in //! 2d approximation. Standard_EXPORT virtual void Resolution(const Standard_Integer Index, const Standard_Real Tol, Standard_Real& TolU, Standard_Real& TolV) const; //! Returns the tolerance to reach in approximation //! to satisfy. //! BoundTol error at the Boundary //! AngleTol tangent error at the Boundary (in radian) //! SurfTol error inside the surface. Standard_EXPORT virtual void GetTolerance(const Standard_Real BoundTol, const Standard_Real SurfTol, const Standard_Real AngleTol, TColStd_Array1OfReal& Tol3d) const = 0; //! Is useful, if (me) have to run numerical algorithm to perform D0, D1 or D2 Standard_EXPORT virtual void SetTolerance(const Standard_Real Tol3d, const Standard_Real Tol2d) = 0; //! Get the barycentre of Surface. //! An very poor estimation is sufficient. //! This information is useful to perform well conditioned rational approximation. //! Warning: Used only if IsRational Standard_EXPORT virtual gp_Pnt BarycentreOfSurf() const; //! Returns the length of the greater section. //! Thisinformation is useful to G1's control. //! Warning: With an little value, approximation can be slower. Standard_EXPORT virtual Standard_Real MaximalSection() const; //! Compute the minimal value of weight for each poles in all sections. //! This information is useful to control error in rational approximation. //! Warning: Used only if IsRational Standard_EXPORT virtual void GetMinimalWeight(TColStd_Array1OfReal& Weigths) const; DEFINE_STANDARD_RTTIEXT(Approx_SweepFunction, Standard_Transient) protected: private: }; #endif // _Approx_SweepFunction_HeaderFile