Open CASCADE Technology 6.6.0
Public Member Functions
Approx_SweepFunction Class Reference

defined the function used by SweepApproximation to
perform sweeping application.

#include <Approx_SweepFunction.hxx>

Inheritance diagram for Approx_SweepFunction:
Inheritance graph
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Public Member Functions

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 section for v = param

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 first derivative in v direction of the
section for v = param
Warning : It used only for C1 or C2 aproximation

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)
 compute the second derivative in v direction of the
section for v = param
Warning : It used only for C2 aproximation

virtual Standard_Integer Nb2dCurves () const =0
 get the number of 2d curves to approximate.

virtual void SectionShape (Standard_Integer &NbPoles, Standard_Integer &NbKnots, Standard_Integer &Degree) const =0
 get the format of an section

virtual void Knots (TColStd_Array1OfReal &TKnots) const =0
 get the Knots of the section

virtual void Mults (TColStd_Array1OfInteger &TMults) const =0
 get the Multplicities of the section

virtual Standard_Boolean IsRational () const =0
 Returns if the sections are rationnal or not

virtual Standard_Integer NbIntervals (const GeomAbs_Shape S) const =0
 Returns the number of intervals for continuity
<S>.
May be one if Continuity(me) >= <S>

virtual void Intervals (TColStd_Array1OfReal &T, const GeomAbs_Shape S) const =0
 Stores in <T> the parameters bounding the intervals
of continuity <S>.

The array must provide enough room to accomodate
for the parameters. i.e. T.Length() > NbIntervals()

virtual void SetInterval (const Standard_Real First, const Standard_Real Last)=0
 Sets the bounds of the parametric interval on
the fonction
This determines the derivatives in these values if the
function is not Cn.

virtual void Resolution (const Standard_Integer Index, const Standard_Real Tol, Standard_Real &TolU, Standard_Real &TolV) const
 Returns the resolutions in the sub-space 2d <Index>
This information is usfull to find an good tolerance in
2d approximation.

virtual void GetTolerance (const Standard_Real BoundTol, const Standard_Real SurfTol, const Standard_Real AngleTol, TColStd_Array1OfReal &Tol3d) const =0
 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.

virtual void SetTolerance (const Standard_Real Tol3d, const Standard_Real Tol2d)=0
 Is usefull, if (me) have to run numerical
algorithm to perform D0, D1 or D2

virtual gp_Pnt BarycentreOfSurf () const
 Get the barycentre of Surface.
An very poor estimation is sufficent.
This information is usefull to perform well
conditioned rational approximation.
Warning: Used only if <me> IsRational

virtual Standard_Real MaximalSection () const
 Returns the length of the greater section. This
information is usefull to G1's control.
Warning: With an little value, approximation can be slower.

virtual void GetMinimalWeight (TColStd_Array1OfReal &Weigths) const
 Compute the minimal value of weight for each poles
in all sections.
This information is usefull to control error
in rational approximation.
Warning: Used only if <me> IsRational


Member Function Documentation

virtual gp_Pnt Approx_SweepFunction::BarycentreOfSurf ( ) const [virtual]
virtual Standard_Boolean Approx_SweepFunction::D0 ( const Standard_Real  Param,
const Standard_Real  First,
const Standard_Real  Last,
TColgp_Array1OfPnt Poles,
TColgp_Array1OfPnt2d Poles2d,
TColStd_Array1OfReal Weigths 
) [pure virtual]
virtual Standard_Boolean Approx_SweepFunction::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 
) [virtual]
virtual Standard_Boolean Approx_SweepFunction::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 
) [virtual]
virtual void Approx_SweepFunction::GetMinimalWeight ( TColStd_Array1OfReal Weigths) const [virtual]
virtual void Approx_SweepFunction::GetTolerance ( const Standard_Real  BoundTol,
const Standard_Real  SurfTol,
const Standard_Real  AngleTol,
TColStd_Array1OfReal Tol3d 
) const [pure virtual]
virtual void Approx_SweepFunction::Intervals ( TColStd_Array1OfReal T,
const GeomAbs_Shape  S 
) const [pure virtual]
virtual Standard_Boolean Approx_SweepFunction::IsRational ( ) const [pure virtual]
virtual void Approx_SweepFunction::Knots ( TColStd_Array1OfReal TKnots) const [pure virtual]
virtual Standard_Real Approx_SweepFunction::MaximalSection ( ) const [virtual]
virtual void Approx_SweepFunction::Mults ( TColStd_Array1OfInteger TMults) const [pure virtual]
virtual Standard_Integer Approx_SweepFunction::Nb2dCurves ( ) const [pure virtual]
virtual Standard_Integer Approx_SweepFunction::NbIntervals ( const GeomAbs_Shape  S) const [pure virtual]
virtual void Approx_SweepFunction::Resolution ( const Standard_Integer  Index,
const Standard_Real  Tol,
Standard_Real TolU,
Standard_Real TolV 
) const [virtual]
virtual void Approx_SweepFunction::SectionShape ( Standard_Integer NbPoles,
Standard_Integer NbKnots,
Standard_Integer Degree 
) const [pure virtual]
virtual void Approx_SweepFunction::SetInterval ( const Standard_Real  First,
const Standard_Real  Last 
) [pure virtual]
virtual void Approx_SweepFunction::SetTolerance ( const Standard_Real  Tol3d,
const Standard_Real  Tol2d 
) [pure virtual]

The documentation for this class was generated from the following file:
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