PlanetMoons Class Reference

#include <planetmoons.h>

Inheritance diagram for PlanetMoons:

Public Member Functions
	PlanetMoons ()
virtual	~PlanetMoons ()
void	EquatorialToHorizontal (const dms *LSTh, const dms *lat)
virtual void	findPosition (const KSNumbers *num, const KSPlanetBase *pla, const KSSun *sunptr)=0
bool	inFront (int id) const
TrailObject *	moon (int id)
QString	name (int id) const
int	nMoons () const
double	x (int i) const
double	y (int i) const
double	z (int i) const

Protected Attributes
QVector< bool >	InFront
QVector< TrailObject * >	Moon
QVector< double >	XP
QVector< double >	YP
QVector< double >	ZP

Detailed Description

Implements the moons of a planet.

TODO: make the moons SkyObjects, rather than just points.

Author

Vipul Kumar Singh

Version

1.0

Definition at line 39 of file planetmoons.h.

Constructor & Destructor Documentation

PlanetMoons::PlanetMoons

(

)

Constructor.

Assign the name of each moon, and initialize their XYZ positions to zero.

Definition at line 27 of file planetmoons.cpp.

PlanetMoons::~PlanetMoons ( )

virtual

Destructor.

Delete moon objects.

Definition at line 30 of file planetmoons.cpp.

Member Function Documentation

void PlanetMoons::EquatorialToHorizontal	(	const dms *	LSTh,
		const dms *	lat
	)

Convert the RA,Dec coordinates of each moon to Az,Alt.

Parameters

LSTh	pointer to the current local sidereal time
lat	pointer to the geographic latitude

Definition at line 38 of file planetmoons.cpp.

virtual void PlanetMoons::findPosition ( const KSNumbers *  num, const KSPlanetBase *  pla, const KSSun *  sunptr  )

pure virtual

Find the positions of each Moon, relative to the planet.

We use an XYZ coordinate system, centered on the planet, where the X-axis corresponds to the planet's Equator, the Y-Axis is parallel to the planet's Poles, and the Z-axis points along the line joining the Earth and the planet. Once the XYZ positions are known, this function also computes the RA, Dec positions of each Moon, and sets the inFront bool variable to indicate whether the Moon is nearer to us than the planet or not (this information is used to determine whether the Moon should be drawn on top of the planet, or vice versa).

Parameters

num	pointer to the KSNumbers object describing the date/time at which to find the positions.
pla	pointer to the planet object
sunptr	pointer to the Sun object

Implemented in JupiterMoons.

bool PlanetMoons::inFront ( int  id ) const

inline

Returns

true if the Moon is nearer to Earth than Saturn.

Parameters

id	which moon? 0=Mimas,1=Enceladus,2=Tethys,3=Dione,4=Rhea,5=Titan,6=Hyperion,7=Lapetus

Definition at line 95 of file planetmoons.h.

TrailObject* PlanetMoons::moon ( int  id )

inline

Returns

pointer to a moon given the ID number.

Parameters

id	which moon?

Definition at line 56 of file planetmoons.h.

QString PlanetMoons::name

(

int

id

)

const

Returns

the name of a moon.

Parameters

id	which moon?

Definition at line 34 of file planetmoons.cpp.

int PlanetMoons::nMoons ( ) const

inline

Returns

the number of moons around the planet

Definition at line 118 of file planetmoons.h.

double PlanetMoons::x ( int  i ) const

inline

Returns

the X-coordinate in the planet-centered coord. system.

Parameters

i	which moon?

Definition at line 101 of file planetmoons.h.

double PlanetMoons::y ( int  i ) const

inline

Returns

the Y-coordinate in the planet-centered coord. system.

Parameters

i	which moon?

Definition at line 107 of file planetmoons.h.

double PlanetMoons::z ( int  i ) const

inline

Returns

the Z-coordinate in the Planet-centered coord. system.

Parameters

i	which moon?

Definition at line 113 of file planetmoons.h.

Member Data Documentation

QVector<bool> PlanetMoons::InFront

protected

Definition at line 122 of file planetmoons.h.

QVector<TrailObject*> PlanetMoons::Moon

protected

Definition at line 121 of file planetmoons.h.

QVector<double> PlanetMoons::XP

protected

Definition at line 124 of file planetmoons.h.

QVector<double> PlanetMoons::YP

protected

Definition at line 124 of file planetmoons.h.

QVector<double> PlanetMoons::ZP

protected

Definition at line 124 of file planetmoons.h.

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

• planetmoons.h
• planetmoons.cpp