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 bool	D0 (const double Param, const double First, const double Last, NCollection_Array1< gp_Pnt > &Poles, NCollection_Array1< gp_Pnt2d > &Poles2d, NCollection_Array1< double > &Weigths)=0
	compute the section for v = param

virtual bool	D1 (const double Param, const double First, const double Last, NCollection_Array1< gp_Pnt > &Poles, NCollection_Array1< gp_Vec > &DPoles, NCollection_Array1< gp_Pnt2d > &Poles2d, NCollection_Array1< gp_Vec2d > &DPoles2d, NCollection_Array1< double > &Weigths, NCollection_Array1< double > &DWeigths)
	compute the first derivative in v direction of the section for v = param Warning : It used only for C1 or C2 approximation

virtual bool	D2 (const double Param, const double First, const double Last, NCollection_Array1< gp_Pnt > &Poles, NCollection_Array1< gp_Vec > &DPoles, NCollection_Array1< gp_Vec > &D2Poles, NCollection_Array1< gp_Pnt2d > &Poles2d, NCollection_Array1< gp_Vec2d > &DPoles2d, NCollection_Array1< gp_Vec2d > &D2Poles2d, NCollection_Array1< double > &Weigths, NCollection_Array1< double > &DWeigths, NCollection_Array1< double > &D2Weigths)
	compute the second derivative in v direction of the section for v = param Warning : It used only for C2 approximation

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

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

virtual void	Knots (NCollection_Array1< double > &TKnots) const =0
	get the Knots of the section

virtual void	Mults (NCollection_Array1< int > &TMults) const =0
	get the Multplicities of the section

virtual bool	IsRational () const =0
	Returns if the sections are rational or not.

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

virtual void	Intervals (NCollection_Array1< double > &T, const GeomAbs_Shape S) const =0
	Stores in <T> the parameters bounding the intervals of continuity .

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

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

virtual void	GetTolerance (const double BoundTol, const double SurfTol, const double AngleTol, NCollection_Array1< double > &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 double Tol3d, const double Tol2d)=0
	Is useful, 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 sufficient. This information is useful to perform well conditioned rational approximation. Warning: Used only if <me> IsRational.

virtual double	MaximalSection () 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.

virtual void	GetMinimalWeight (NCollection_Array1< double > &Weigths) const
	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 <me> IsRational.

Public Member Functions inherited from Standard_Transient
	Standard_Transient ()
	Empty constructor.

	Standard_Transient (const Standard_Transient &)
	Copy constructor – does nothing.

Standard_Transient &	operator= (const Standard_Transient &)
	Assignment operator, needed to avoid copying reference counter.

virtual	~Standard_Transient ()=default
	Destructor must be virtual.

virtual const opencascade::handle< Standard_Type > &	DynamicType () const
	Returns a type descriptor about this object.

bool	IsInstance (const opencascade::handle< Standard_Type > &theType) const
	Returns a true value if this is an instance of Type.

bool	IsInstance (const char *const theTypeName) const
	Returns a true value if this is an instance of TypeName.

bool	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.

bool	IsKind (const char *const 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.

Standard_Transient *	This () 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.

int	GetRefCount () const noexcept
	Get the reference counter of this object.

void	IncrementRefCounter () noexcept
	Increments the reference counter of this object. Uses relaxed memory ordering since incrementing only requires atomicity, not synchronization with other memory operations.

int	DecrementRefCounter () noexcept
	Decrements the reference counter of this object; returns the decremented value. Uses release ordering for the decrement to ensure all writes to the object are visible before the count reaches zero. An acquire fence is added only when the count reaches zero, ensuring proper synchronization before deletion. This is more efficient than using acq_rel for every decrement.

virtual void	Delete () const
	Memory deallocator for transient classes.

Additional Inherited Members
Public Types inherited from Standard_Transient
typedef void	base_type
	Returns a type descriptor about this object.

Static Public Member Functions inherited from Standard_Transient
static constexpr const char *	get_type_name ()
	Returns a type descriptor about this object.

static const opencascade::handle< Standard_Type > &	get_type_descriptor ()
	Returns type descriptor of Standard_Transient class.

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 sufficient. This information is useful to perform well conditioned rational approximation. Warning: Used only if <me> IsRational.

Reimplemented in BRepBlend_AppFuncRoot, GeomFill_CircularBlendFunc, and GeomFill_SweepFunction.

◆ D0()

virtual bool Approx_SweepFunction::D0	(	const double	Param,
		const double	First,
		const double	Last,
		NCollection_Array1< gp_Pnt > &	Poles,
		NCollection_Array1< gp_Pnt2d > &	Poles2d,
		NCollection_Array1< double > &	Weigths )

pure virtual

compute the section for v = param

Implemented in BRepBlend_AppFuncRoot, GeomFill_CircularBlendFunc, and GeomFill_SweepFunction.

◆ D1()

virtual bool Approx_SweepFunction::D1	(	const double	Param,
		const double	First,
		const double	Last,
		NCollection_Array1< gp_Pnt > &	Poles,
		NCollection_Array1< gp_Vec > &	DPoles,
		NCollection_Array1< gp_Pnt2d > &	Poles2d,
		NCollection_Array1< gp_Vec2d > &	DPoles2d,
		NCollection_Array1< double > &	Weigths,
		NCollection_Array1< double > &	DWeigths )

virtual

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

Reimplemented in BRepBlend_AppFuncRoot, GeomFill_CircularBlendFunc, and GeomFill_SweepFunction.

◆ D2()

virtual bool Approx_SweepFunction::D2	(	const double	Param,
		const double	First,
		const double	Last,
		NCollection_Array1< gp_Pnt > &	Poles,
		NCollection_Array1< gp_Vec > &	DPoles,
		NCollection_Array1< gp_Vec > &	D2Poles,
		NCollection_Array1< gp_Pnt2d > &	Poles2d,
		NCollection_Array1< gp_Vec2d > &	DPoles2d,
		NCollection_Array1< gp_Vec2d > &	D2Poles2d,
		NCollection_Array1< double > &	Weigths,
		NCollection_Array1< double > &	DWeigths,
		NCollection_Array1< double > &	D2Weigths )

virtual

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

Reimplemented in BRepBlend_AppFuncRoot, GeomFill_CircularBlendFunc, and GeomFill_SweepFunction.

◆ GetMinimalWeight()

virtual void Approx_SweepFunction::GetMinimalWeight ( NCollection_Array1< double > & Weigths ) const

virtual

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 <me> IsRational.

Reimplemented in BRepBlend_AppFuncRoot, GeomFill_CircularBlendFunc, and GeomFill_SweepFunction.

◆ GetTolerance()

virtual void Approx_SweepFunction::GetTolerance	(	const double	BoundTol,
		const double	SurfTol,
		const double	AngleTol,
		NCollection_Array1< double > &	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 BRepBlend_AppFuncRoot, GeomFill_CircularBlendFunc, and GeomFill_SweepFunction.