include/opencascade/GeomFill_SectionLaw.hxx

0001 // Created on: 1997-11-20
0002 // Created by: Philippe MANGIN
0003 // Copyright (c) 1997-1999 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 _GeomFill_SectionLaw_HeaderFile
0018 #define _GeomFill_SectionLaw_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_Type.hxx>
0022
0023 #include <Standard_Transient.hxx>
0024 #include <TColgp_Array1OfPnt.hxx>
0025 #include <TColStd_Array1OfReal.hxx>
0026 #include <TColgp_Array1OfVec.hxx>
0027 #include <Standard_Integer.hxx>
0028 #include <TColStd_Array1OfInteger.hxx>
0029 #include <GeomAbs_Shape.hxx>
0030 class Geom_BSplineSurface;
0031 class gp_Pnt;
0032 class Geom_Curve;
0033
0034
0035 class GeomFill_SectionLaw;
0036 DEFINE_STANDARD_HANDLE(GeomFill_SectionLaw, Standard_Transient)
0037
0038 //! To define section law in  sweeping
0039 class GeomFill_SectionLaw : public Standard_Transient
0040 {
0041
0042 public:
0043
0044
0045   //! compute the section for v = param
0046   Standard_EXPORT virtual Standard_Boolean D0 (const Standard_Real Param, TColgp_Array1OfPnt& Poles, TColStd_Array1OfReal& Weigths) = 0;
0047
0048   //! compute the first  derivative in v direction  of the
0049   //! section for v =  param
0050   //! Warning : It used only for C1 or C2 approximation
0051   Standard_EXPORT virtual Standard_Boolean D1 (const Standard_Real Param, TColgp_Array1OfPnt& Poles, TColgp_Array1OfVec& DPoles, TColStd_Array1OfReal& Weigths, TColStd_Array1OfReal& DWeigths);
0052
0053   //! compute the second derivative  in v direction of the
0054   //! section  for v = param
0055   //! Warning : It used only for C2 approximation
0056   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);
0057
0058   //! give if possible an bspline Surface, like iso-v are the
0059   //! section.   If it is  not possible this  methode have to
0060   //! get an Null Surface. It is the default  implementation.
0061   Standard_EXPORT virtual Handle(Geom_BSplineSurface) BSplineSurface() const;
0062
0063   //! get the format of an  section
0064   Standard_EXPORT virtual void SectionShape (Standard_Integer& NbPoles, Standard_Integer& NbKnots, Standard_Integer& Degree) const = 0;
0065
0066   //! get the Knots of the section
0067   Standard_EXPORT virtual void Knots (TColStd_Array1OfReal& TKnots) const = 0;
0068
0069   //! get the Multplicities of the section
0070   Standard_EXPORT virtual void Mults (TColStd_Array1OfInteger& TMults) const = 0;
0071
0072   //! Returns if the sections are rationnal or not
0073   Standard_EXPORT virtual Standard_Boolean IsRational() const = 0;
0074
0075   //! Returns if the sections are periodic or not
0076   Standard_EXPORT virtual Standard_Boolean IsUPeriodic() const = 0;
0077
0078   //! Returns if law is periodic or not
0079   Standard_EXPORT virtual Standard_Boolean IsVPeriodic() const = 0;
0080
0081   //! Returns  the number  of  intervals for  continuity
0082   //! <S>.
0083   //! May be one if Continuity(me) >= <S>
0084   Standard_EXPORT virtual Standard_Integer NbIntervals (const GeomAbs_Shape S) const = 0;
0085
0086   //! Stores in <T> the  parameters bounding the intervals
0087   //! of continuity <S>.
0088   //!
0089   //! The array must provide  enough room to  accommodate
0090   //! for the parameters. i.e. T.Length() > NbIntervals()
0091   Standard_EXPORT virtual void Intervals (TColStd_Array1OfReal& T, const GeomAbs_Shape S) const = 0;
0092
0093   //! Sets the bounds of the parametric interval on
0094   //! the function
0095   //! This determines the derivatives in these values if the
0096   //! function is not Cn.
0097   Standard_EXPORT virtual void SetInterval (const Standard_Real First, const Standard_Real Last) = 0;
0098
0099   //! Gets the bounds of the parametric interval on
0100   //! the function
0101   Standard_EXPORT virtual void GetInterval (Standard_Real& First, Standard_Real& Last) const = 0;
0102
0103   //! Gets the bounds of the function parametric domain.
0104   //! Warning: This domain it is  not modified by the
0105   //! SetValue method
0106   Standard_EXPORT virtual void GetDomain (Standard_Real& First, Standard_Real& Last) const = 0;
0107
0108   //! Returns the tolerances associated at each poles to
0109   //! reach  in approximation, to satisfy: BoundTol error
0110   //! at the   Boundary  AngleTol tangent error  at  the
0111   //! Boundary  (in radian)  SurfTol   error inside the
0112   //! surface.
0113   Standard_EXPORT virtual void GetTolerance (const Standard_Real BoundTol, const Standard_Real SurfTol, const Standard_Real AngleTol, TColStd_Array1OfReal& Tol3d) const = 0;
0114
0115   //! Is  useful, if (me)  have to run  numerical
0116   //! algorithm  to perform D0,  D1 or D2
0117   //! The default implementation make nothing.
0118   Standard_EXPORT virtual void SetTolerance (const Standard_Real Tol3d, const Standard_Real Tol2d);
0119
0120   //! Get the barycentre of Surface.
0121   //! An   very  poor estimation is sufficient.
0122   //! This information is useful to perform well
0123   //! conditioned rational approximation.
0124   //! Warning: Used only if <me> IsRational
0125   Standard_EXPORT virtual gp_Pnt BarycentreOfSurf() const;
0126
0127   //! Returns the   length of the greater section. This
0128   //! information is useful to G1's control.
0129   //! Warning: With an little value, approximation can be slower.
0130   Standard_EXPORT virtual Standard_Real MaximalSection() const = 0;
0131
0132   //! Compute the minimal value of weight for each poles
0133   //! in all  sections.
0134   //! This information is  useful to control error
0135   //! in rational approximation.
0136   //! Warning: Used only if <me> IsRational
0137   Standard_EXPORT virtual void GetMinimalWeight (TColStd_Array1OfReal& Weigths) const;
0138
0139   //! Say if all sections are equals
0140   Standard_EXPORT virtual Standard_Boolean IsConstant (Standard_Real& Error) const;
0141
0142   //! Return a  copy of the  constant Section,  if me
0143   //! IsConstant
0144   Standard_EXPORT virtual Handle(Geom_Curve) ConstantSection() const;
0145
0146   //! Returns True if all section  are circle, with same
0147   //! plane,same center and  linear  radius  evolution
0148   //! Return False by Default.
0149   Standard_EXPORT virtual Standard_Boolean IsConicalLaw (Standard_Real& Error) const;
0150
0151   //! Return the circle section  at parameter <Param>, if
0152   //! <me> a  IsConicalLaw
0153   Standard_EXPORT virtual Handle(Geom_Curve) CirclSection (const Standard_Real Param) const;
0154
0155
0156
0157
0158   DEFINE_STANDARD_RTTIEXT(GeomFill_SectionLaw,Standard_Transient)
0159
0160 protected:
0161
0162
0163
0164
0165 private:
0166
0167
0168
0169
0170 };
0171
0172
0173
0174
0175
0176
0177
0178 #endif // _GeomFill_SectionLaw_HeaderFile