Marble::EquirectProjection

Marble::EquirectProjection Class Reference

#include <EquirectProjection.h>

Inheritance diagram for Marble::EquirectProjection:

Public Member Functions

 EquirectProjection ()
 
QString description () const override
 
bool geoCoordinates (const int x, const int y, const ViewportParams *params, qreal &lon, qreal &lat, GeoDataCoordinates::Unit unit=GeoDataCoordinates::Degree) const override
 
QIcon icon () const override
 
GeoDataLatLonAltBox latLonAltBox (const QRect &screenRect, const ViewportParams *viewport) const override
 
bool mapCoversViewport (const ViewportParams *viewport) const override
 
QString name () const override
 
PreservationType preservationType () const override
 
bool screenCoordinates (const GeoDataCoordinates &coordinates, const ViewportParams *params, qreal &x, qreal &y, bool &globeHidesPoint) const override
 
bool screenCoordinates (const GeoDataCoordinates &coordinates, const ViewportParams *viewport, qreal *x, qreal &y, int &pointRepeatNum, const QSizeF &size, bool &globeHidesPoint) const override
 
- Public Member Functions inherited from Marble::CylindricalProjection
QPainterPath mapShape (const ViewportParams *viewport) const override
 
bool repeatableX () const override
 
bool screenCoordinates (const GeoDataLineString &lineString, const ViewportParams *viewport, QVector< QPolygonF * > &polygons) const override
 
SurfaceType surfaceType () const override
 
bool traversableDateLine () const override
 
bool traversablePoles () const override
 
- Public Member Functions inherited from Marble::AbstractProjection
 AbstractProjection ()
 
virtual qreal clippingRadius () const
 
virtual bool isClippedToSphere () const
 
virtual bool isOrientedNormal () const
 
QRegion mapRegion (const ViewportParams *viewport) const
 
qreal maxLat () const
 
virtual qreal maxValidLat () const
 
qreal minLat () const
 
virtual qreal minValidLat () const
 
bool screenCoordinates (const qreal lon, const qreal lat, const ViewportParams *viewport, qreal &x, qreal &y) const
 
bool screenCoordinates (const GeoDataCoordinates &geopoint, const ViewportParams *viewport, qreal &x, qreal &y) const
 
void setMaxLat (qreal maxLat)
 
void setMinLat (qreal minLat)
 

Additional Inherited Members

- Public Types inherited from Marble::AbstractProjection
enum  PreservationType { NoPreservation, Conformal, EqualArea }
 
enum  SurfaceType {
  Cylindrical, Pseudocylindrical, Hybrid, Conical,
  Pseudoconical, Azimuthal
}
 
- Protected Member Functions inherited from Marble::CylindricalProjection
 CylindricalProjection (CylindricalProjectionPrivate *dd)
 
- Protected Member Functions inherited from Marble::AbstractProjection
 AbstractProjection (AbstractProjectionPrivate *dd)
 
- Protected Attributes inherited from Marble::AbstractProjection
const QScopedPointer< AbstractProjectionPrivate > d_ptr
 

Detailed Description

A class to implement the Equirectangular projection used by the "Flat Map" view.

Definition at line 35 of file EquirectProjection.h.

Constructor & Destructor Documentation

EquirectProjection::EquirectProjection ( )

Construct a new EquirectProjection.

Definition at line 27 of file EquirectProjection.cpp.

Member Function Documentation

QString EquirectProjection::description ( ) const
overridevirtual

Returns a short user description of the projection that can be used in tooltips or dialogs.

Implements Marble::AbstractProjection.

Definition at line 43 of file EquirectProjection.cpp.

bool EquirectProjection::geoCoordinates ( const int  x,
const int  y,
const ViewportParams params,
qreal &  lon,
qreal &  lat,
GeoDataCoordinates::Unit  unit = GeoDataCoordinates::Degree 
) const
overridevirtual

Get the earth coordinates corresponding to a pixel in the map.

If the pixel (x, y) is outside the globe, only lon will be calculated, and lat will be unchanged.

Parameters
xthe x coordinate of the pixel
ythe y coordinate of the pixel
paramsparameters of the viewport
lonthe longitude angle is returned through this parameter
latthe latitude angle is returned through this parameter
unitthe unit
Returns
true if the pixel (x, y) is within the map false if the pixel (x, y) is above or underneath the map

Implements Marble::AbstractProjection.

Definition at line 146 of file EquirectProjection.cpp.

QIcon EquirectProjection::icon ( ) const
overridevirtual

Returns an icon for the projection.

Implements Marble::AbstractProjection.

Definition at line 48 of file EquirectProjection.cpp.

GeoDataLatLonAltBox EquirectProjection::latLonAltBox ( const QRect screenRect,
const ViewportParams viewport 
) const
overridevirtual

Returns a GeoDataLatLonAltBox bounding box of the given screenrect inside the given viewport.

Reimplemented from Marble::AbstractProjection.

Definition at line 195 of file EquirectProjection.cpp.

bool EquirectProjection::mapCoversViewport ( const ViewportParams viewport) const
overridevirtual

Returns whether the projected data fully obstructs the current viewport.

In this case there are no black areas visible around the actual map. This case allows for performance optimizations.

Implements Marble::AbstractProjection.

Definition at line 253 of file EquirectProjection.cpp.

QString EquirectProjection::name ( ) const
overridevirtual

Returns the user-visible name of the projection.

Implements Marble::AbstractProjection.

Definition at line 38 of file EquirectProjection.cpp.

bool EquirectProjection::screenCoordinates ( const GeoDataCoordinates coordinates,
const ViewportParams params,
qreal &  x,
qreal &  y,
bool &  globeHidesPoint 
) const
overridevirtual

Get the screen coordinates corresponding to geographical coordinates in the map.

Parameters
coordinatesthe coordinates of the requested pixel position
paramsthe viewport parameters
xthe x coordinate of the pixel is returned through this parameter
ythe y coordinate of the pixel is returned through this parameter
globeHidesPointwhether the globe hides the point
Returns
true if the geographical coordinates are visible on the screen false if the geographical coordinates are not visible on the screen

Implements Marble::AbstractProjection.

Definition at line 53 of file EquirectProjection.cpp.

bool EquirectProjection::screenCoordinates ( const GeoDataCoordinates coordinates,
const ViewportParams viewport,
qreal *  x,
qreal &  y,
int &  pointRepeatNum,
const QSizeF size,
bool &  globeHidesPoint 
) const
overridevirtual

Get the coordinates of screen points for geographical coordinates in the map.

Parameters
coordinatesthe point on earth, including altitude, that we want the coordinates for.
viewportthe viewport parameters
xthe x coordinates of the pixels are returned through this parameter
ythe y coordinate of the pixel is returned through this parameter
pointRepeatNumthe amount of times that a single geographical point gets represented on the map
sizethe size
globeHidesPointwhether the point gets hidden on the far side of the earth
Returns
true if the geographical coordinates are visible on the screen false if the geographical coordinates are not visible on the screen
See also
ViewportParams

Implements Marble::AbstractProjection.

Definition at line 85 of file EquirectProjection.cpp.


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