IlvCoordinate Class Reference

An IlvCoordinate object is a point defined by two values in double precision. More...

#include <ilviews/maps/coord.h>

Public Member Functions
	IlvCoordinate (IlDouble x=0.0, IlDouble y=0.0)
	This constructor initializes a new instance of IlvCoordinate. More...
IlBoolean	isCloseTo (const IlvCoordinate &other, IlDouble tolerance=0.0)
	Checks if two coordinates are close. More...
void	move (IlDouble x, IlDouble y)
	This member function takes existing coordinates and moves them to another position. More...
IlvCoordinate &	operator= (const IlvCoordinate &c)
	This member function copies c to the current coordinates. More...
int	operator== (const IlvCoordinate &c) const
	Tests equality of two coordinates. More...
void	translate (IlDouble dx, IlDouble dy)
	Translates an IlvCoordinate. More...
void	translate (const IlvCoordinate &dc)
	Translates an IlvCoordinate. More...
IlDouble	x () const
	Returns the x value. More...
void	x (IlDouble x)
	Sets the x value. More...
IlDouble	y () const
	Returns the y value. More...
void	y (IlDouble y)
	Sets the y value. More...

Detailed Description

An IlvCoordinate object is a point defined by two values in double precision.

An IlvCoordinate object is a point defined by two values in double precision. The class IlvCoordinate is the basic data structure for computing projections. The x and y values designate either the Cartesian coordinates resulting from a forward projection or the latitude and the longitude obtained by inverse computation. Library: ilvmaps

Constructor & Destructor Documentation

IlvCoordinate::IlvCoordinate	(	IlDouble	x = 0.0,
		IlDouble	y = 0.0
	)

This constructor initializes a new instance of IlvCoordinate.

Parameters

x	The x value.
y	The y value.

Member Function Documentation

IlBoolean IlvCoordinate::isCloseTo	(	const IlvCoordinate &	other,
		IlDouble	tolerance = 0.0
	)

Checks if two coordinates are close.

This member function returns IlTrue if the distance between the x and y values of the current coordinates and the one of the coordinates other are less than the value specified by the parameter tolerance.

void IlvCoordinate::move	(	IlDouble	x,
		IlDouble	y
	)

This member function takes existing coordinates and moves them to another position.

Parameters

x	The new x value.
y	The new y value.

IlvCoordinate& IlvCoordinate::operator=

(

const IlvCoordinate &

c

)

This member function copies c to the current coordinates.

Returns

The current coordinates.

int IlvCoordinate::operator==

(

const IlvCoordinate &

c

)

const

Tests equality of two coordinates.

This member function tests whether two coordinates are equal. Because a strict comparison of floating values may not be significant, you can also use the function isCloseTo, documented below.

void IlvCoordinate::translate	(	IlDouble	dx,
		IlDouble	dy
	)

Translates an IlvCoordinate.

This member function shifts existing coordinates to another location by means of a delta-distance approach. The dx and dy values represent the distance between the current position of the coordinates and the target position.

Parameters

dx	The x translation.
dy	The y translation.

void IlvCoordinate::translate

(

const IlvCoordinate &

dc

)

Translates an IlvCoordinate.

This member function shifts existing coordinates to another location by means of a delta-distance approach. This member function performs the same operation as the previous one, except that instead of specifying a distance by means of x and y values, the dc parameter is passed as an IlvCoordinate object.

IlDouble IlvCoordinate::x

(

)

const

Returns the x value.

Returns

The x value.

void IlvCoordinate::x

(

IlDouble

x

)

Sets the x value.

Parameters

x	The new x value.

IlDouble IlvCoordinate::y

(

)

const

Returns the y value.

Returns

The y value.

void IlvCoordinate::y

(

IlDouble

y

)

Sets the y value.

Parameters

y	The new y value.