Root class for 2D curves on which geometric algorithms work. An adapted curve is an interface between the services provided by a curve, and those required of the curve by algorithms, which use it. A derived concrete class is provided: Geom2dAdaptor_Curve for a curve from the Geom2d package. More...

#include <Adaptor2d_Curve2d.hxx>

Inheritance diagram for Adaptor2d_Curve2d:

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Public Member Functions
virtual Handle< Adaptor2d_Curve2d >	ShallowCopy () const
	Shallow copy of adaptor.

virtual Standard_Real	FirstParameter () const

virtual Standard_Real	LastParameter () const

virtual GeomAbs_Shape	Continuity () const

virtual Standard_Integer	NbIntervals (const GeomAbs_Shape S) const
	If necessary, breaks the curve in intervals of continuity ~~. And returns the number of intervals.~~

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

virtual Handle< Adaptor2d_Curve2d >	Trim (const Standard_Real First, const Standard_Real Last, const Standard_Real Tol) const
	Returns a curve equivalent of <me> between parameters <First> and <Last>. <Tol> is used to test for 3d points confusion. If <First> >= <Last>

virtual Standard_Boolean	IsClosed () const

virtual Standard_Boolean	IsPeriodic () const

virtual Standard_Real	Period () const

virtual gp_Pnt2d	Value (const Standard_Real U) const
	Computes the point of parameter U on the curve.

virtual void	D0 (const Standard_Real U, gp_Pnt2d &P) const
	Computes the point of parameter U on the curve.

virtual void	D1 (const Standard_Real U, gp_Pnt2d &P, gp_Vec2d &V) const
	Computes the point of parameter U on the curve with its first derivative. Raised if the continuity of the current interval is not C1.

virtual void	D2 (const Standard_Real U, gp_Pnt2d &P, gp_Vec2d &V1, gp_Vec2d &V2) const
	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.

virtual void	D3 (const Standard_Real U, gp_Pnt2d &P, gp_Vec2d &V1, gp_Vec2d &V2, gp_Vec2d &V3) const
	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.

virtual gp_Vec2d	DN (const Standard_Real U, const Standard_Integer N) const
	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.

virtual Standard_Real	Resolution (const Standard_Real R3d) const
	Returns the parametric resolution corresponding to the real space resolution <R3d>.

virtual GeomAbs_CurveType	GetType () const
	Returns the type of the curve in the current interval : Line, Circle, Ellipse, Hyperbola, Parabola, BezierCurve, BSplineCurve, OtherCurve.

virtual gp_Lin2d	Line () const

virtual gp_Circ2d	Circle () const

virtual gp_Elips2d	Ellipse () const

virtual gp_Hypr2d	Hyperbola () const

virtual gp_Parab2d	Parabola () const

virtual Standard_Integer	Degree () const

virtual Standard_Boolean	IsRational () const

virtual Standard_Integer	NbPoles () const

virtual Standard_Integer	NbKnots () const

virtual Standard_Integer	NbSamples () const

virtual Handle< Geom2d_BezierCurve >	Bezier () const

virtual Handle< Geom2d_BSplineCurve >	BSpline () const

virtual	~Adaptor2d_Curve2d ()

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 ()
	Destructor must be virtual.

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

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

Standard_Boolean	IsInstance (const Standard_CString theTypeName) const
	Returns a true value if this is an instance of TypeName.

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.

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.

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.

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

void	IncrementRefCounter () noexcept
	Increments the reference counter of this object.

Standard_Integer	DecrementRefCounter () noexcept
	Decrements the reference counter of this object; returns the decremented value.

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

Root class for 2D curves on which geometric algorithms work. An adapted curve is an interface between the services provided by a curve, and those required of the curve by algorithms, which use it. A derived concrete class is provided: Geom2dAdaptor_Curve for a curve from the Geom2d package.

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.

Constructor & Destructor Documentation

◆ ~Adaptor2d_Curve2d()

virtual Adaptor2d_Curve2d::~Adaptor2d_Curve2d ( )

virtual

Member Function Documentation

◆ Bezier()

virtual Handle< Geom2d_BezierCurve > Adaptor2d_Curve2d::Bezier ( ) const

virtual

Reimplemented in Adaptor2d_Line2d, Adaptor2d_OffsetCurve, Geom2dAdaptor_Curve, and ProjLib_ProjectedCurve.

◆ BSpline()

virtual Handle< Geom2d_BSplineCurve > Adaptor2d_Curve2d::BSpline ( ) const

virtual

Reimplemented in Adaptor2d_Line2d, Adaptor2d_OffsetCurve, Geom2dAdaptor_Curve, and ProjLib_ProjectedCurve.

◆ Circle()

virtual gp_Circ2d Adaptor2d_Curve2d::Circle ( ) const

virtual

Reimplemented in Adaptor2d_Line2d, Adaptor2d_OffsetCurve, Geom2dAdaptor_Curve, and ProjLib_ProjectedCurve.

◆ Continuity()

virtual GeomAbs_Shape Adaptor2d_Curve2d::Continuity ( ) const

virtual

Reimplemented in Adaptor2d_Line2d, Adaptor2d_OffsetCurve, Geom2dAdaptor_Curve, ProjLib_CompProjectedCurve, and ProjLib_ProjectedCurve.

◆ D0()

virtual void Adaptor2d_Curve2d::D0	(	const Standard_Real	U,
		gp_Pnt2d &	P
	)		const

virtual

Computes the point of parameter U on the curve.

Reimplemented in Adaptor2d_OffsetCurve, Geom2dAdaptor_Curve, ProjLib_CompProjectedCurve, ProjLib_ProjectedCurve, and Adaptor2d_Line2d.

◆ D1()

virtual void Adaptor2d_Curve2d::D1	(	const Standard_Real	U,
		gp_Pnt2d &	P,
		gp_Vec2d &	V
	)		const

virtual

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 in Adaptor2d_OffsetCurve, Geom2dAdaptor_Curve, ProjLib_CompProjectedCurve, ProjLib_ProjectedCurve, and Adaptor2d_Line2d.

◆ D2()

virtual void Adaptor2d_Curve2d::D2	(	const Standard_Real	U,
		gp_Pnt2d &	P,
		gp_Vec2d &	V1,
		gp_Vec2d &	V2
	)		const

virtual

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 in Adaptor2d_OffsetCurve, Geom2dAdaptor_Curve, ProjLib_CompProjectedCurve, ProjLib_ProjectedCurve, and Adaptor2d_Line2d.

◆ D3()

virtual void Adaptor2d_Curve2d::D3	(	const Standard_Real	U,
		gp_Pnt2d &	P,
		gp_Vec2d &	V1,
		gp_Vec2d &	V2,
		gp_Vec2d &	V3
	)		const

virtual

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 in Adaptor2d_OffsetCurve, Geom2dAdaptor_Curve, ProjLib_ProjectedCurve, and Adaptor2d_Line2d.

◆ Degree()

virtual Standard_Integer Adaptor2d_Curve2d::Degree ( ) const

virtual

Reimplemented in Adaptor2d_Line2d, Adaptor2d_OffsetCurve, Geom2dAdaptor_Curve, and ProjLib_ProjectedCurve.

◆ DN()

virtual gp_Vec2d Adaptor2d_Curve2d::DN	(	const Standard_Real	U,
		const Standard_Integer	N
	)		const

virtual

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 in Adaptor2d_Line2d, Adaptor2d_OffsetCurve, Geom2dAdaptor_Curve, ProjLib_CompProjectedCurve, and ProjLib_ProjectedCurve.