Geom2dAdaptor_Curve Class Reference

An interface between the services provided by any curve from the package Geom2d and those required of the curve by algorithms which use it. More...

#include <Geom2dAdaptor_Curve.hxx>

Inheritance diagram for Geom2dAdaptor_Curve:

Data Structures
struct	OffsetData
	Internal structure for 2D offset curve evaluation data. More...
struct	BezierData
	Internal structure for Bezier curve evaluation data. More...
struct	BSplineData
	Internal structure for BSpline curve evaluation data. More...

Public Types
using	CurveDataVariant
	Variant type for 2D curve-specific evaluation data.
typedef void	base_type
	Returns a type descriptor about this object.

Public Member Functions
	Geom2dAdaptor_Curve ()
	Geom2dAdaptor_Curve (const occ::handle< Geom2d_Curve > &C)
	Geom2dAdaptor_Curve (const occ::handle< Geom2d_Curve > &C, const double UFirst, const double ULast)
	Standard_ConstructionError is raised if Ufirst>Ulast.
occ::handle< Adaptor2d_Curve2d >	ShallowCopy () const override
	Shallow copy of adaptor.
void	Reset ()
	Reset currently loaded curve (undone Load()).
void	Load (const occ::handle< Geom2d_Curve > &theCurve)
void	Load (const occ::handle< Geom2d_Curve > &theCurve, const double theUFirst, const double theULast)
	Standard_ConstructionError is raised if theUFirst > theULast + Precision::PConfusion().
bool	IsInitialized () const
	Returns true if the adaptor has been loaded with a curve.
const occ::handle< Geom2d_Curve > &	Curve () const
double	FirstParameter () const override
double	LastParameter () const override
GeomAbs_Shape	Continuity () const override
int	NbIntervals (const GeomAbs_Shape S) const override
	If necessary, breaks the curve in intervals of continuity . And returns the number of intervals.
void	Intervals (NCollection_Array1< double > &T, const GeomAbs_Shape S) const override
	Stores in <T> the parameters bounding the intervals of continuity .
occ::handle< Adaptor2d_Curve2d >	Trim (const double First, const double Last, const double Tol) const override
	Returns a curve equivalent of <me> between parameters <First> and <Last>. <Tol> is used to test for 3d points confusion. If <First> >= <Last>.
bool	IsClosed () const override
bool	IsPeriodic () const override
double	Period () const override
gp_Pnt2d	Value (const double U) const final
	Computes the point of parameter U on the curve.
void	D0 (const double U, gp_Pnt2d &P) const final
	Computes the point of parameter U.
void	D1 (const double U, gp_Pnt2d &P, gp_Vec2d &V) const final
	Computes the point of parameter U on the curve with its first derivative. Raised if the continuity of the current interval is not C1.
void	D2 (const double U, gp_Pnt2d &P, gp_Vec2d &V1, gp_Vec2d &V2) const final
	Returns the point P of parameter U, the first and second derivatives V1 and V2. Raised if the continuity of the current interval is not C2.
void	D3 (const double U, gp_Pnt2d &P, gp_Vec2d &V1, gp_Vec2d &V2, gp_Vec2d &V3) const final
	Returns the point P of parameter U, the first, the second and the third derivative. Raised if the continuity of the current interval is not C3.
gp_Vec2d	DN (const double U, const int N) const final
	The returned vector gives the value of the derivative for the order of derivation N. Raised if the continuity of the current interval is not CN. Raised if N < 1.
double	Resolution (const double Ruv) const override
	returns the parametric resolution
GeomAbs_CurveType	GetType () const override
	Returns the type of the curve in the current interval: Line, Circle, Ellipse, Hyperbola, Parabola, BezierCurve, BSplineCurve, OtherCurve.
gp_Lin2d	Line () const override
gp_Circ2d	Circle () const override
gp_Elips2d	Ellipse () const override
gp_Hypr2d	Hyperbola () const override
gp_Parab2d	Parabola () const override
int	Degree () const override
bool	IsRational () const override
int	NbPoles () const override
int	NbKnots () const override
int	NbSamples () const override
occ::handle< Geom2d_BezierCurve >	Bezier () const override
occ::handle< Geom2d_BSplineCurve >	BSpline () const override
gp_Pnt2d	EvalD0 (const double theU) const final
	Point evaluation. Raises an exception on failure.
Geom2d_Curve::ResD1	EvalD1 (const double theU) const final
	D1 evaluation. Raises an exception on failure.
Geom2d_Curve::ResD2	EvalD2 (const double theU) const final
	D2 evaluation. Raises an exception on failure.
Geom2d_Curve::ResD3	EvalD3 (const double theU) const final
	D3 evaluation. Raises an exception on failure.
gp_Vec2d	EvalDN (const double theU, const int theN) const final
	DN evaluation. Raises an exception on failure.
Public Member Functions inherited from Adaptor2d_Curve2d
	~Adaptor2d_Curve2d () override
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.

Protected Attributes
occ::handle< Geom2d_Curve >	myCurve
GeomAbs_CurveType	myTypeCurve
double	myFirst
double	myLast
CurveDataVariant	myCurveData
	Curve-specific evaluation data (BSpline, Bezier, offset).

Additional Inherited Members
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

An interface between the services provided by any curve from the package Geom2d and those required of the curve by algorithms which use it.

Polynomial coefficients of BSpline curves used for their evaluation are cached for better performance. Therefore these evaluations are not thread-safe and parallel evaluations need to be prevented.

Member Typedef Documentation

CurveDataVariant

using Geom2dAdaptor_Curve::CurveDataVariant

Initial value:

std::variant<std::monostate,
                                       gp_Lin2d,
                                       gp_Circ2d,
                                       gp_Elips2d,
                                       gp_Hypr2d,
                                       gp_Parab2d,
                                       OffsetData,
                                       BezierData,
                                       BSplineData>

Variant type for 2D curve-specific evaluation data.

Constructor & Destructor Documentation

Geom2dAdaptor_Curve() [1/3]

Geom2dAdaptor_Curve::Geom2dAdaptor_Curve

(

)

Geom2dAdaptor_Curve() [2/3]

Geom2dAdaptor_Curve::Geom2dAdaptor_Curve

(

const occ::handle< Geom2d_Curve > &

C

)

Geom2dAdaptor_Curve() [3/3]

Geom2dAdaptor_Curve::Geom2dAdaptor_Curve	(	const occ::handle< Geom2d_Curve > &	C,
		const double	UFirst,
		const double	ULast )

Standard_ConstructionError is raised if Ufirst>Ulast.

Member Function Documentation

Bezier()

occ::handle< Geom2d_BezierCurve > Geom2dAdaptor_Curve::Bezier ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

BSpline()

occ::handle< Geom2d_BSplineCurve > Geom2dAdaptor_Curve::BSpline ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

Circle()

gp_Circ2d Geom2dAdaptor_Curve::Circle ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

Continuity()

GeomAbs_Shape Geom2dAdaptor_Curve::Continuity ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

Curve()

const occ::handle< Geom2d_Curve > & Geom2dAdaptor_Curve::Curve ( ) const

inline

D0()

void Geom2dAdaptor_Curve::D0 ( const double U, gp_Pnt2d & P ) const

finalvirtual

Computes the point of parameter U.

Reimplemented from Adaptor2d_Curve2d.

D1()

void Geom2dAdaptor_Curve::D1 ( const double U, gp_Pnt2d & P, gp_Vec2d & V ) const

finalvirtual

Computes the point of parameter U on the curve with its first derivative. Raised if the continuity of the current interval is not C1.

Reimplemented from Adaptor2d_Curve2d.

D2()

void Geom2dAdaptor_Curve::D2 ( const double U, gp_Pnt2d & P, gp_Vec2d & V1, gp_Vec2d & V2 ) const

finalvirtual

Returns the point P of parameter U, the first and second derivatives V1 and V2. Raised if the continuity of the current interval is not C2.

Reimplemented from Adaptor2d_Curve2d.

D3()

void Geom2dAdaptor_Curve::D3 ( const double U, gp_Pnt2d & P, gp_Vec2d & V1, gp_Vec2d & V2, gp_Vec2d & V3 ) const

finalvirtual

Returns the point P of parameter U, the first, the second and the third derivative. Raised if the continuity of the current interval is not C3.

Reimplemented from Adaptor2d_Curve2d.

Degree()

int Geom2dAdaptor_Curve::Degree ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

DN()

gp_Vec2d Geom2dAdaptor_Curve::DN ( const double U, const int N ) const

finalvirtual

The returned vector gives the value of the derivative for the order of derivation N. Raised if the continuity of the current interval is not CN. Raised if N < 1.

Reimplemented from Adaptor2d_Curve2d.

Ellipse()

gp_Elips2d Geom2dAdaptor_Curve::Ellipse ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

EvalD0()

gp_Pnt2d Geom2dAdaptor_Curve::EvalD0 ( const double theU ) const

nodiscardfinalvirtual

Point evaluation. Raises an exception on failure.

Reimplemented from Adaptor2d_Curve2d.

EvalD1()

Geom2d_Curve::ResD1 Geom2dAdaptor_Curve::EvalD1 ( const double theU ) const

nodiscardfinalvirtual

D1 evaluation. Raises an exception on failure.

Reimplemented from Adaptor2d_Curve2d.

EvalD2()

Geom2d_Curve::ResD2 Geom2dAdaptor_Curve::EvalD2 ( const double theU ) const

nodiscardfinalvirtual

D2 evaluation. Raises an exception on failure.

Reimplemented from Adaptor2d_Curve2d.

EvalD3()

Geom2d_Curve::ResD3 Geom2dAdaptor_Curve::EvalD3 ( const double theU ) const

nodiscardfinalvirtual

D3 evaluation. Raises an exception on failure.

Reimplemented from Adaptor2d_Curve2d.

EvalDN()

gp_Vec2d Geom2dAdaptor_Curve::EvalDN ( const double theU, const int theN ) const

nodiscardfinalvirtual

DN evaluation. Raises an exception on failure.

Reimplemented from Adaptor2d_Curve2d.

FirstParameter()

double Geom2dAdaptor_Curve::FirstParameter ( ) const

inlineoverridevirtual

Reimplemented from Adaptor2d_Curve2d.

GetType()

GeomAbs_CurveType Geom2dAdaptor_Curve::GetType ( ) const

inlineoverridevirtual

Returns the type of the curve in the current interval: Line, Circle, Ellipse, Hyperbola, Parabola, BezierCurve, BSplineCurve, OtherCurve.

Reimplemented from Adaptor2d_Curve2d.

Hyperbola()

gp_Hypr2d Geom2dAdaptor_Curve::Hyperbola ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

Intervals()

void Geom2dAdaptor_Curve::Intervals ( NCollection_Array1< double > & T, const GeomAbs_Shape S ) const

overridevirtual

Stores in <T> the parameters bounding the intervals of continuity .

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

Reimplemented from Adaptor2d_Curve2d.

IsClosed()

bool Geom2dAdaptor_Curve::IsClosed ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

IsInitialized()

bool Geom2dAdaptor_Curve::IsInitialized ( ) const

inline

Returns true if the adaptor has been loaded with a curve.

IsPeriodic()

bool Geom2dAdaptor_Curve::IsPeriodic ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

IsRational()

bool Geom2dAdaptor_Curve::IsRational ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

LastParameter()

double Geom2dAdaptor_Curve::LastParameter ( ) const

inlineoverridevirtual

Reimplemented from Adaptor2d_Curve2d.

Line()

gp_Lin2d Geom2dAdaptor_Curve::Line ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

Load() [1/2]

void Geom2dAdaptor_Curve::Load ( const occ::handle< Geom2d_Curve > & theCurve )

inline

Load() [2/2]

void Geom2dAdaptor_Curve::Load ( const occ::handle< Geom2d_Curve > & theCurve, const double theUFirst, const double theULast )

inline

Standard_ConstructionError is raised if theUFirst > theULast + Precision::PConfusion().

NbIntervals()

int Geom2dAdaptor_Curve::NbIntervals ( const GeomAbs_Shape S ) const

overridevirtual

If necessary, breaks the curve in intervals of continuity . And returns the number of intervals.

Reimplemented from Adaptor2d_Curve2d.

NbKnots()

int Geom2dAdaptor_Curve::NbKnots ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

NbPoles()

int Geom2dAdaptor_Curve::NbPoles ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

NbSamples()

int Geom2dAdaptor_Curve::NbSamples ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

Parabola()

gp_Parab2d Geom2dAdaptor_Curve::Parabola ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

Period()

double Geom2dAdaptor_Curve::Period ( ) const

overridevirtual

Reimplemented from Adaptor2d_Curve2d.

Reset()

void Geom2dAdaptor_Curve::Reset

(

)

Reset currently loaded curve (undone Load()).

Resolution()

double Geom2dAdaptor_Curve::Resolution ( const double Ruv ) const

overridevirtual

returns the parametric resolution

Reimplemented from Adaptor2d_Curve2d.

ShallowCopy()

occ::handle< Adaptor2d_Curve2d > Geom2dAdaptor_Curve::ShallowCopy ( ) const

overridevirtual

Shallow copy of adaptor.

Reimplemented from Adaptor2d_Curve2d.

Trim()

occ::handle< Adaptor2d_Curve2d > Geom2dAdaptor_Curve::Trim ( const double First, const double Last, const double Tol ) const

overridevirtual

Returns a curve equivalent of <me> between parameters <First> and <Last>. <Tol> is used to test for 3d points confusion. If <First> >= <Last>.

Reimplemented from Adaptor2d_Curve2d.

Value()

gp_Pnt2d Geom2dAdaptor_Curve::Value ( const double U ) const

finalvirtual

Computes the point of parameter U on the curve.

Reimplemented from Adaptor2d_Curve2d.

Field Documentation

myCurve

occ::handle<Geom2d_Curve> Geom2dAdaptor_Curve::myCurve

protected

myCurveData

CurveDataVariant Geom2dAdaptor_Curve::myCurveData

protected

Curve-specific evaluation data (BSpline, Bezier, offset).

myFirst

double Geom2dAdaptor_Curve::myFirst

protected

myLast

double Geom2dAdaptor_Curve::myLast

protected

myTypeCurve

GeomAbs_CurveType Geom2dAdaptor_Curve::myTypeCurve

protected

---

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

• Geom2dAdaptor_Curve.hxx