osmscout::TileProjection Class Reference

#include <libosmscout/include/osmscout/projection/TileProjection.h>

Inheritance diagram for osmscout::TileProjection:

Collaboration diagram for osmscout::TileProjection:

Public Member Functions
	TileProjection ()=default
	TileProjection (const TileProjection &)=default
	TileProjection (TileProjection &&)=default
TileProjection &	operator= (const TileProjection &)=default
TileProjection &	operator= (TileProjection &&)=default
	~TileProjection () override=default
bool	CanBatch () const override
bool	IsValid () const override
bool	IsValidFor (const GeoCoord &coord) const override
bool	Set (const OSMTileId &tile, const Magnification &magnification, size_t width, size_t height)
bool	Set (const OSMTileId &tile, const Magnification &magnification, double dpi, size_t width, size_t height)
bool	Set (const OSMTileIdBox &tileBox, const Magnification &magnification, double dpi, size_t width, size_t height)
bool	PixelToGeo (double x, double y, GeoCoord &coord) const override
bool	GeoToPixel (const GeoCoord &coord, Vertex2D &pixel) const override
bool	IsLinearInterpolationEnabled () const
void	SetLinearInterpolationUsage (bool b)
Public Member Functions inherited from osmscout::Projection
	Projection ()=default
	Projection (const Projection &)=default
	Projection (Projection &&)=default
Projection &	operator= (const Projection &)=default
Projection &	operator= (Projection &&)=default
virtual	~Projection ()=default
GeoCoord	GetCenter () const
double	GetAngle () const
size_t	GetWidth () const
size_t	GetHeight () const
ScreenBox	GetScreenBox () const
Magnification	GetMagnification () const
double	GetDPI () const
GeoBox	GetDimensions () const
double	GetPixelSize () const
double	GetMeterInPixel () const
double	GetMeterInMM () const
double	ConvertWidthToPixel (double width) const
double	ConvertPixelToWidth (double pixel) const
bool	BoundingBoxToPixel (const GeoBox &boundingBox, ScreenBox &screenBox) const

Protected Member Functions
virtual bool	SetInternal (const GeoBox &boundingBox, const Magnification &magnification, double dpi, size_t width, size_t height)
void	GeoToPixel (const BatchTransformer &transformData) const override

Additional Inherited Members
Protected Attributes inherited from osmscout::Projection
GeoCoord	center
	Coordinate of the center of the displayed area.
double	angle =0.0
	Display rotation angle in radians, canvas clockwise.
Magnification	magnification
	Current magnification.
double	dpi =0.0
	Screen DPI.
size_t	width =0
	Width of image.
size_t	height =0
	Height of image.
GeoBox	boundingBox
	Bounding box of the current projection on the ground.
double	pixelSize =0.0
	Size of a pixel in meter.
double	meterInPixel =0.0
	Number of on screen pixel for one meter on the ground.
double	meterInMM =0.0
	Number of on screen millimeters for one meter on the ground.

Detailed Description

Mercator projection as used by the OpenStreetMap tile rendering code.

The TileProjection simplifies the general Mercator projection code to make sure that there are no effects based on rounding errors or similar.

Constructor & Destructor Documentation

TileProjection() [1/3]

osmscout::TileProjection::TileProjection ( )

default

TileProjection() [2/3]

osmscout::TileProjection::TileProjection ( const TileProjection & )

default

TileProjection() [3/3]

osmscout::TileProjection::TileProjection ( TileProjection && )

default

~TileProjection()

osmscout::TileProjection::~TileProjection ( )

overridedefault

Member Function Documentation

CanBatch()

bool osmscout::TileProjection::CanBatch ( ) const

inlineoverridevirtual

Implements osmscout::Projection.

GeoToPixel() [1/2]

void osmscout::TileProjection::GeoToPixel ( const BatchTransformer & transformData ) const

overrideprotectedvirtual

Implements osmscout::Projection.

GeoToPixel() [2/2]

bool osmscout::TileProjection::GeoToPixel ( const GeoCoord & coord, Vertex2D & pixel ) const

overridevirtual

Converts a geo coordinate to a pixel coordinate.

Return true on success, false if given coordinate is not valid for this projection.

Implements osmscout::Projection.

IsLinearInterpolationEnabled()

bool osmscout::TileProjection::IsLinearInterpolationEnabled ( ) const

inlinenodiscard

IsValid()

bool osmscout::TileProjection::IsValid ( ) const

inlineoverridevirtual

Implements osmscout::Projection.

IsValidFor()

bool osmscout::TileProjection::IsValidFor ( const GeoCoord & coord ) const

inlineoverridevirtual

Return true if given coordinate is valid for this projection

Implements osmscout::Projection.

operator=() [1/2]

TileProjection & osmscout::TileProjection::operator= ( const TileProjection & )

default

operator=() [2/2]

TileProjection & osmscout::TileProjection::operator= ( TileProjection && )

default

PixelToGeo()

bool osmscout::TileProjection::PixelToGeo ( double x, double y, GeoCoord & coord ) const

overridevirtual

Converts a pixel coordinate to a geo coordinate.

Return true on success, false if returned coordinate is not valid for this projection.

Implements osmscout::Projection.

Set() [1/3]

bool osmscout::TileProjection::Set	(	const OSMTileId &	tile,
		const Magnification &	magnification,
		double	dpi,
		size_t	width,
		size_t	height )

Set() [2/3]

bool osmscout::TileProjection::Set ( const OSMTileId & tile, const Magnification & magnification, size_t width, size_t height )

inline

Set() [3/3]

bool osmscout::TileProjection::Set	(	const OSMTileIdBox &	tileBox,
		const Magnification &	magnification,
		double	dpi,
		size_t	width,
		size_t	height )

SetInternal()

virtual bool osmscout::TileProjection::SetInternal ( const GeoBox & boundingBox, const Magnification & magnification, double dpi, size_t width, size_t height )

protectedvirtual

SetLinearInterpolationUsage()

void osmscout::TileProjection::SetLinearInterpolationUsage ( bool b )

inline

Switch to enable/disable linear interpolation of latitude to pixel computation. It speedup GeoToPixel calculation with fractional error on small render area.

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

• libosmscout/include/osmscout/projection/TileProjection.h