GCPnts_QuasiUniformAbscissa Class Reference

This class provides an algorithm to compute a uniform abscissa distribution of points on a curve, i.e. a sequence of equidistant points. The distance between two consecutive points is measured along the curve. The distribution is defined: More...

#include <GCPnts_QuasiUniformAbscissa.hxx>

Public Member Functions
	GCPnts_QuasiUniformAbscissa ()
	Constructs an empty algorithm. To define the problem to be solved, use the function Initialize. More...
	GCPnts_QuasiUniformAbscissa (Adaptor3d_Curve &C, const Standard_Integer NbPoints)
	Computes a uniform abscissa distribution of points. More...
	GCPnts_QuasiUniformAbscissa (Adaptor3d_Curve &C, const Standard_Integer NbPoints, const Standard_Real U1, const Standard_Real U2)
	Computes a uniform abscissa distribution of points on the part of curve C limited by the two parameter values U1 and U2, where Abscissa is the curvilinear distance between two consecutive points of the distribution. The first point of the distribution is either the origin of curve C or the point of parameter U1. The following points are computed such that the curvilinear distance between two consecutive points is equal to Abscissa. The last point of the distribution is either the end point of curve C or the point of parameter U2. However the curvilinear distance between this last point and the point just preceding it in the distribution is, of course, generally not equal to Abscissa. Use the function IsDone to verify that the computation was successful, the function NbPoints to obtain the number of points of the computed distribution, and the function Parameter to read the parameter of each point. Warning The roles of U1 and U2 are inverted if U1 > U2 . Warning C is an adapted curve, that is, an object which is an interface between: More...
void	Initialize (Adaptor3d_Curve &C, const Standard_Integer NbPoints)
	Initialize the algoritms with , <NbPoints> and. More...
void	Initialize (Adaptor3d_Curve &C, const Standard_Integer NbPoints, const Standard_Real U1, const Standard_Real U2)
	Initialize the algoritms with , <Abscissa>, <U1>, <U2>. More...
	GCPnts_QuasiUniformAbscissa (Adaptor2d_Curve2d &C, const Standard_Integer NbPoints)
	Computes a uniform abscissa distribution of points on the Curve2d . <NbPoints> defines the nomber of desired points. More...
	GCPnts_QuasiUniformAbscissa (Adaptor2d_Curve2d &C, const Standard_Integer NbPoints, const Standard_Real U1, const Standard_Real U2)
	Computes a Uniform abscissa distribution of points on a part of the Curve2d . More...
void	Initialize (Adaptor2d_Curve2d &C, const Standard_Integer NbPoints)
	Initialize the algoritms with , <NbPoints> and. More...
void	Initialize (Adaptor2d_Curve2d &C, const Standard_Integer NbPoints, const Standard_Real U1, const Standard_Real U2)
	Initialize the algoritms with , <Abscissa>, <U1>, <U2>. More...
Standard_Boolean	IsDone () const
	Returns true if the computation was successful. IsDone is a protection against: More...
Standard_Integer	NbPoints () const
	Returns the number of points of the distribution computed by this algorithm. This value is either: More...
Standard_Real	Parameter (const Standard_Integer Index) const
	Returns the parameter of the point of index Index in the distribution computed by this algorithm. Warning Index must be greater than or equal to 1, and less than or equal to the number of points of the distribution. However, pay particular attention as this condition is not checked by this function. Exceptions StdFail_NotDone if this algorithm has not been initialized, or if the computation was not successful. More...

Detailed Description

This class provides an algorithm to compute a uniform abscissa distribution of points on a curve, i.e. a sequence of equidistant points. The distance between two consecutive points is measured along the curve. The distribution is defined:

• either by the curvilinear distance between two consecutive points
• or by a number of points.

Constructor & Destructor Documentation

GCPnts_QuasiUniformAbscissa::GCPnts_QuasiUniformAbscissa

(

)

Constructs an empty algorithm. To define the problem to be solved, use the function Initialize.

GCPnts_QuasiUniformAbscissa::GCPnts_QuasiUniformAbscissa	(	Adaptor3d_Curve &	C,
		const Standard_Integer	NbPoints
	)

Computes a uniform abscissa distribution of points.

• on the curve C where Abscissa is the curvilinear distance between two consecutive points of the distribution.

GCPnts_QuasiUniformAbscissa::GCPnts_QuasiUniformAbscissa	(	Adaptor3d_Curve &	C,
		const Standard_Integer	NbPoints,
		const Standard_Real	U1,
		const Standard_Real	U2
	)

Computes a uniform abscissa distribution of points on the part of curve C limited by the two parameter values U1 and U2, where Abscissa is the curvilinear distance between two consecutive points of the distribution. The first point of the distribution is either the origin of curve C or the point of parameter U1. The following points are computed such that the curvilinear distance between two consecutive points is equal to Abscissa. The last point of the distribution is either the end point of curve C or the point of parameter U2. However the curvilinear distance between this last point and the point just preceding it in the distribution is, of course, generally not equal to Abscissa. Use the function IsDone to verify that the computation was successful, the function NbPoints to obtain the number of points of the computed distribution, and the function Parameter to read the parameter of each point. Warning The roles of U1 and U2 are inverted if U1 > U2 . Warning C is an adapted curve, that is, an object which is an interface between:

• the services provided by either a 2D curve from the package Geom2d (in the case of an Adaptor2d_Curve2d curve) or a 3D curve from the package Geom (in the case of an Adaptor3d_Curve curve),
• and those required on the curve by the computation algorithm.

GCPnts_QuasiUniformAbscissa::GCPnts_QuasiUniformAbscissa	(	Adaptor2d_Curve2d &	C,
		const Standard_Integer	NbPoints
	)

Computes a uniform abscissa distribution of points on the Curve2d . <NbPoints> defines the nomber of desired points.

GCPnts_QuasiUniformAbscissa::GCPnts_QuasiUniformAbscissa	(	Adaptor2d_Curve2d &	C,
		const Standard_Integer	NbPoints,
		const Standard_Real	U1,
		const Standard_Real	U2
	)

Computes a Uniform abscissa distribution of points on a part of the Curve2d .

Member Function Documentation

void GCPnts_QuasiUniformAbscissa::Initialize	(	Adaptor3d_Curve &	C,
		const Standard_Integer	NbPoints
	)

Initialize the algoritms with , <NbPoints> and.

void GCPnts_QuasiUniformAbscissa::Initialize	(	Adaptor3d_Curve &	C,
		const Standard_Integer	NbPoints,
		const Standard_Real	U1,
		const Standard_Real	U2
	)

Initialize the algoritms with , <Abscissa>, <U1>, <U2>.

void GCPnts_QuasiUniformAbscissa::Initialize	(	Adaptor2d_Curve2d &	C,
		const Standard_Integer	NbPoints
	)

Initialize the algoritms with , <NbPoints> and.

void GCPnts_QuasiUniformAbscissa::Initialize	(	Adaptor2d_Curve2d &	C,
		const Standard_Integer	NbPoints,
		const Standard_Real	U1,
		const Standard_Real	U2
	)

Initialize the algoritms with , <Abscissa>, <U1>, <U2>.

Standard_Boolean GCPnts_QuasiUniformAbscissa::IsDone

(

)

const

Returns true if the computation was successful. IsDone is a protection against:

• non-convergence of the algorithm
• querying the results before computation.

Standard_Integer GCPnts_QuasiUniformAbscissa::NbPoints

(

)

const

Returns the number of points of the distribution computed by this algorithm. This value is either:

• the one imposed on the algorithm at the time of construction (or initialization), or
• the one computed by the algorithm when the curvilinear distance between two consecutive points of the distribution is imposed on the algorithm at the time of construction (or initialization). Exceptions StdFail_NotDone if this algorithm has not been initialized, or if the computation was not successful.

Standard_Real GCPnts_QuasiUniformAbscissa::Parameter

(

const Standard_Integer

Index

)

const

Returns the parameter of the point of index Index in the distribution computed by this algorithm. Warning Index must be greater than or equal to 1, and less than or equal to the number of points of the distribution. However, pay particular attention as this condition is not checked by this function. Exceptions StdFail_NotDone if this algorithm has not been initialized, or if the computation was not successful.

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

• GCPnts_QuasiUniformAbscissa.hxx