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