// Created on: 1997-11-20 // 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 _GeomFill_SectionLaw_HeaderFile #define _GeomFill_SectionLaw_HeaderFile #include #include #include #include #include #include #include #include #include #include #include class Geom_BSplineSurface; class gp_Pnt; class Geom_Curve; class GeomFill_SectionLaw; DEFINE_STANDARD_HANDLE(GeomFill_SectionLaw, Standard_Transient) //! To define section law in sweeping class GeomFill_SectionLaw : public Standard_Transient { public: //! compute the section for v = param Standard_EXPORT virtual Standard_Boolean D0 (const Standard_Real Param, TColgp_Array1OfPnt& Poles, 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, TColgp_Array1OfPnt& Poles, TColgp_Array1OfVec& DPoles, 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, TColgp_Array1OfPnt& Poles, TColgp_Array1OfVec& DPoles, TColgp_Array1OfVec& D2Poles, TColStd_Array1OfReal& Weigths, TColStd_Array1OfReal& DWeigths, TColStd_Array1OfReal& D2Weigths); //! give if possible an bspline Surface, like iso-v are the //! section. If it is not possible this methode have to //! get an Null Surface. It is the default implementation. Standard_EXPORT virtual Handle(Geom_BSplineSurface) BSplineSurface() const; //! 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 rationnal or not Standard_EXPORT virtual Standard_Boolean IsRational() const = 0; //! Returns if the sections are periodic or not Standard_EXPORT virtual Standard_Boolean IsUPeriodic() const = 0; //! Returns if law is periodic or not Standard_EXPORT virtual Standard_Boolean IsVPeriodic() 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 function //! 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; //! Gets the bounds of the parametric interval on //! the function Standard_EXPORT virtual void GetInterval (Standard_Real& First, Standard_Real& Last) const = 0; //! Gets the bounds of the function parametric domain. //! Warning: This domain it is not modified by the //! SetValue method Standard_EXPORT virtual void GetDomain (Standard_Real& First, Standard_Real& Last) const = 0; //! Returns the tolerances associated at each poles 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 //! The default implementation make nothing. Standard_EXPORT virtual void SetTolerance (const Standard_Real Tol3d, const Standard_Real Tol2d); //! 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. This //! information is useful to G1's control. //! Warning: With an little value, approximation can be slower. Standard_EXPORT virtual Standard_Real MaximalSection() const = 0; //! 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; //! Say if all sections are equals Standard_EXPORT virtual Standard_Boolean IsConstant (Standard_Real& Error) const; //! Return a copy of the constant Section, if me //! IsConstant Standard_EXPORT virtual Handle(Geom_Curve) ConstantSection() const; //! Returns True if all section are circle, with same //! plane,same center and linear radius evolution //! Return False by Default. Standard_EXPORT virtual Standard_Boolean IsConicalLaw (Standard_Real& Error) const; //! Return the circle section at parameter , if //! a IsConicalLaw Standard_EXPORT virtual Handle(Geom_Curve) CirclSection (const Standard_Real Param) const; DEFINE_STANDARD_RTTIEXT(GeomFill_SectionLaw,Standard_Transient) protected: private: }; #endif // _GeomFill_SectionLaw_HeaderFile