Open CASCADE Technology  7.4.1.dev
Public Member Functions
Approx_SweepFunction Class Referenceabstract

defined the function used by SweepApproximation to perform sweeping application. More...

#include <Approx_SweepFunction.hxx>

Inheritance diagram for Approx_SweepFunction:
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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 More...
 
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 More...
 
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 More...
 
virtual Standard_Integer Nb2dCurves () const =0
 get the number of 2d curves to approximate. More...
 
virtual void SectionShape (Standard_Integer &NbPoles, Standard_Integer &NbKnots, Standard_Integer &Degree) const =0
 get the format of an section More...
 
virtual void Knots (TColStd_Array1OfReal &TKnots) const =0
 get the Knots of the section More...
 
virtual void Mults (TColStd_Array1OfInteger &TMults) const =0
 get the Multplicities of the section More...
 
virtual Standard_Boolean IsRational () const =0
 Returns if the sections are rationnal or not. More...
 
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> More...
 
virtual void Intervals (TColStd_Array1OfReal &T, const GeomAbs_Shape S) const =0
 Stores in <T> the parameters bounding the intervals of continuity <S>. More...
 
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. More...
 
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. More...
 
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. More...
 
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. More...
 
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. More...
 
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. More...
 
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. More...
 
- Public Member Functions inherited from Standard_Transient
 Standard_Transient ()
 Empty constructor. More...
 
 Standard_Transient (const Standard_Transient &)
 Copy constructor – does nothing. More...
 
Standard_Transientoperator= (const Standard_Transient &)
 Assignment operator, needed to avoid copying reference counter. More...
 
virtual ~Standard_Transient ()
 Destructor must be virtual. More...
 
virtual void Delete () const
 Memory deallocator for transient classes. More...
 
virtual const opencascade::handle< Standard_Type > & DynamicType () const
 Returns a type descriptor about this object. More...
 
Standard_Boolean IsInstance (const opencascade::handle< Standard_Type > &theType) const
 Returns a true value if this is an instance of Type. More...
 
Standard_Boolean IsInstance (const Standard_CString theTypeName) const
 Returns a true value if this is an instance of TypeName. More...
 
Standard_Boolean IsKind (const opencascade::handle< Standard_Type > &theType) const
 Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...
 
Standard_Boolean IsKind (const Standard_CString theTypeName) const
 Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More...
 
Standard_TransientThis () const
 Returns non-const pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero. More...
 
Standard_Integer GetRefCount () const
 Get the reference counter of this object. More...
 
void IncrementRefCounter () const
 Increments the reference counter of this object. More...
 
Standard_Integer DecrementRefCounter () const
 Decrements the reference counter of this object; returns the decremented value. More...
 

Additional Inherited Members

- Public Types inherited from Standard_Transient
typedef void base_type
 Returns a type descriptor about this object. More...
 
- Static Public Member Functions inherited from Standard_Transient
static const char * get_type_name ()
 Returns a type descriptor about this object. More...
 
static const opencascade::handle< Standard_Type > & get_type_descriptor ()
 Returns type descriptor of Standard_Transient class. More...
 

Detailed Description

defined the function used by SweepApproximation to perform sweeping application.

Member Function Documentation

◆ BarycentreOfSurf()

virtual gp_Pnt Approx_SweepFunction::BarycentreOfSurf ( ) const
virtual

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.

Reimplemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ D0()

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

compute the section for v = param

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ D1()

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

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

Reimplemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ D2()

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

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

Reimplemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ GetMinimalWeight()

virtual void Approx_SweepFunction::GetMinimalWeight ( TColStd_Array1OfReal Weigths) const
virtual

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.

Reimplemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ GetTolerance()

virtual void Approx_SweepFunction::GetTolerance ( const Standard_Real  BoundTol,
const Standard_Real  SurfTol,
const Standard_Real  AngleTol,
TColStd_Array1OfReal Tol3d 
) const
pure virtual

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.

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ Intervals()

virtual void Approx_SweepFunction::Intervals ( TColStd_Array1OfReal T,
const GeomAbs_Shape  S 
) const
pure virtual

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()

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ IsRational()

virtual Standard_Boolean Approx_SweepFunction::IsRational ( ) const
pure virtual

Returns if the sections are rationnal or not.

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ Knots()

virtual void Approx_SweepFunction::Knots ( TColStd_Array1OfReal TKnots) const
pure virtual

get the Knots of the section

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ MaximalSection()

virtual Standard_Real Approx_SweepFunction::MaximalSection ( ) const
virtual

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

Reimplemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ Mults()

virtual void Approx_SweepFunction::Mults ( TColStd_Array1OfInteger TMults) const
pure virtual

get the Multplicities of the section

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ Nb2dCurves()

virtual Standard_Integer Approx_SweepFunction::Nb2dCurves ( ) const
pure virtual

get the number of 2d curves to approximate.

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ NbIntervals()

virtual Standard_Integer Approx_SweepFunction::NbIntervals ( const GeomAbs_Shape  S) const
pure virtual

Returns the number of intervals for continuity <S>. May be one if Continuity(me) >= <S>

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ Resolution()

virtual void Approx_SweepFunction::Resolution ( const Standard_Integer  Index,
const Standard_Real  Tol,
Standard_Real TolU,
Standard_Real TolV 
) const
virtual

Returns the resolutions in the sub-space 2d <Index> This information is usfull to find an good tolerance in 2d approximation.

Reimplemented in GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ SectionShape()

virtual void Approx_SweepFunction::SectionShape ( Standard_Integer NbPoles,
Standard_Integer NbKnots,
Standard_Integer Degree 
) const
pure virtual

get the format of an section

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ SetInterval()

virtual void Approx_SweepFunction::SetInterval ( const Standard_Real  First,
const Standard_Real  Last 
)
pure virtual

Sets the bounds of the parametric interval on the fonction This determines the derivatives in these values if the function is not Cn.

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.

◆ SetTolerance()

virtual void Approx_SweepFunction::SetTolerance ( const Standard_Real  Tol3d,
const Standard_Real  Tol2d 
)
pure virtual

Is usefull, if (me) have to run numerical algorithm to perform D0, D1 or D2.

Implemented in GeomFill_CircularBlendFunc, GeomFill_SweepFunction, and BRepBlend_AppFuncRoot.


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