Stellarium  0.20.4
Public Member Functions | Protected Attributes
StelObserver Class Reference

Should be renamed as PlanetBasedObserver and derive from a more generical StelObserver class.

#include <StelObserver.hpp>

Public Member Functions

 StelObserver (const StelLocation &loc)
 Create a new StelObserver instance which is at a fixed Location.
virtual bool update (double)
 Update StelObserver info if needed. More...
Vec3d getCenterVsop87Pos (void) const
 Get the position of the home planet center in the heliocentric VSOP87 frame in AU.
double getDistanceFromCenter (void) const
 Get the distance between observer and home planet center in AU. More...
Vec4d getTopographicOffsetFromCenter (void) const
 Get the geocentric rectangular coordinates of the observer in AU, plus geocentric latitude φ'. More...
Mat4d getRotAltAzToEquatorial (double JD, double JDE) const
 returns rotation matrix for conversion of alt-azimuthal to equatorial coordinates For Earth we need JD(UT), for other planets JDE! To be general, just have both in here!
Mat4d getRotEquatorialToVsop87 (void) const
virtual const QSharedPointer< PlanetgetHomePlanet (void) const
virtual const StelLocationgetCurrentLocation () const
 Get the informations on the current location.
virtual bool isObserverLifeOver () const
 Get whether the life of this observer is over, and therefore that it should be changed to the next one provided by the getNextObserver() method.
virtual bool isTraveling () const
 Get whether the location is a moving one.
virtual StelObservergetNextObserver () const
 Get the next observer to use once the life of this one is over.

Protected Attributes

StelLocation currentLocation
QSharedPointer< Planetplanet

Member Function Documentation

◆ getDistanceFromCenter()

double StelObserver::getDistanceFromCenter ( void  ) const

This is distance ρ from Meeus, Astron. Algorithms, 2nd edition 1998, ch.11, p.81f. ρ is also delivered from getTopographicOffsetFromCenter().v[3];

◆ getTopographicOffsetFromCenter()

Vec4d StelObserver::getTopographicOffsetFromCenter ( void  ) const

This is vector ρ from Meeus, Astron. Algorithms, 2nd edition 1998, ch.11, p.81f. The first component is ρ cos φ' [AU], the second component is ρ sin &phi&' [AU], the third is φ' [radians] the fourth is ρ [AU]

◆ update()

virtual bool StelObserver::update ( double  )

Default implementation does nothing. returns whether we actually changed the position.

Reimplemented in SpaceShipObserver.