#include <DF_Proj_Point.hpp>

Inheritance diagram for DFLib::Proj::Point:

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Public Member Functions
	Point (const std::vector< double > &uPosition, const std::vector< std::string > &projArgs)
	Constructor. More...

	Point (const Point &right)
	Copy Constructor. More...

	~Point ()
	destructor More...

Point &	operator= (const Point &rhs)
	assignment operator More...

void	setUserProj (const std::vector< std::string > &projArgs)
	set user projection information More...

bool	isUserProjLatLong () const
	return true if user projection is a lat/lon system More...

virtual void	setXY (const std::vector< double > &mPosition)
	set mercator projection (XY) position More...

virtual const std::vector< double > &	getXY ()
	get mercator projection (XY) position More...

virtual const std::vector< double > &	getUserCoords ()
	get user position More...

virtual void	setUserCoords (const std::vector< double > &uPosition)
	set user position More...

virtual Point *	Clone ()
	Clone Self. More...

Private Member Functions
void	mercToUser ()

void	userToMerc ()

Private Attributes
std::vector< double >	theMerc

bool	mercDirty

std::vector< double >	theUserCoords

bool	userDirty

projPJ	userProj

projPJ	mercProj

Constructor & Destructor Documentation

DFLib::Proj::Point::Point	(	const std::vector< double > &	uPosition,
		const std::vector< std::string > &	projArgs
	)

Constructor.

Parameters

uPosition	coordinates in user's coordinates
projArgs	a vector of strings representing the Proj.4 description of the user's coordinate system.

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DFLib::Proj::Point::Point ( const Point & right )

Copy Constructor.

DFLib::Proj::Point::~Point ( )

virtual

destructor

Reimplemented from DFLib::Abstract::Point.

Member Function Documentation

Point * DFLib::Proj::Point::Clone ( )

virtual

Clone Self.

Make a copy of yourself, and return a pointer to the copy. This is useful as a prototype: pass a pointer to any concrete implementation to a function, and that function has a way of making other objects of precisely the same type by cloning.

Returns: pointer to

Implements DFLib::Abstract::Point.

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const std::vector< double > & DFLib::Proj::Point::getUserCoords ( )

virtual

get user position

Returns: a vector<double> containing the coordinates of this point in the user's coordinate system.

This method works by converting the mercator coordinates of the point back to the user's coordinate system using the Proj.4 cartographic projection library if the mercator coordinates or user projection have changed since the last call.

Implements DFLib::Abstract::Point.

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const std::vector< double > & DFLib::Proj::Point::getXY ( )

virtual

get mercator projection (XY) position

Returns: vector of coordinates in mercator projection

Implements DFLib::Abstract::Point.

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bool DFLib::Proj::Point::isUserProjLatLong ( ) const

return true if user projection is a lat/lon system

Primarily useful for deciding how to display coordinates (as for example whether to display them in sexigesimal or decimal representation)

void DFLib::Proj::Point::mercToUser ( )

private

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Point & DFLib::Proj::Point::operator= ( const Point & rhs )

assignment operator

void DFLib::Proj::Point::setUserCoords ( const std::vector< double > & uPosition )

virtual

set user position

Sets the coordinates of the point in user's coordinate system, marking the mercator coordinates invalid. Mercator coordinates will be updated by conversion with Proj.4 upon the next call to getXY().

Parameters

uPosition vector of doubles with user coordinates.

Implements DFLib::Abstract::Point.

void DFLib::Proj::Point::setUserProj ( const std::vector< std::string > & projArgs )

set user projection information

Parameters

projArgs vector of strings representing the new projection

This method can be used to change the coordinate system of a point. When called, the Mercator representation of the point is updated, then the user projection is changed. The next call to getUserCoords will therefore return the point's coordinates in the new coordinate system.

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