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< Planet >	getHomePlanet (void) const
virtual const StelLocation &	getCurrentLocation () 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 StelObserver *	getNextObserver () const
	Get the next observer to use once the life of this one is over.

Protected Attributes
StelLocation	currentLocation
QSharedPointer< Planet >	planet

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  )

inlinevirtual

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

Reimplemented in SpaceShipObserver.