KSEarthShadow Class Reference

#include <ksearthshadow.h>

Inheritance diagram for KSEarthShadow:

Public Types
enum	ECLIPSE_TYPE { PARTIAL , FULL_PENUMBRA , FULL_UMBRA , NONE }
Public Types inherited from KSPlanetBase
enum	Planets {   MERCURY = 0 , VENUS = 1 , MARS = 2 , JUPITER = 3 ,   SATURN = 4 , URANUS = 5 , NEPTUNE = 6 , SUN = 7 ,   MOON = 8 , EARTH_SHADOW = 9 , UNKNOWN_PLANET }
Public Types inherited from SkyObject
enum	TYPE {   STAR = 0 , CATALOG_STAR = 1 , PLANET = 2 , OPEN_CLUSTER = 3 ,   GLOBULAR_CLUSTER = 4 , GASEOUS_NEBULA = 5 , PLANETARY_NEBULA = 6 , SUPERNOVA_REMNANT = 7 ,   GALAXY = 8 , COMET = 9 , ASTEROID = 10 , CONSTELLATION = 11 ,   MOON = 12 , ASTERISM = 13 , GALAXY_CLUSTER = 14 , DARK_NEBULA = 15 ,   QUASAR = 16 , MULT_STAR = 17 , RADIO_SOURCE = 18 , SATELLITE = 19 ,   SUPERNOVA = 20 , NUMBER_OF_KNOWN_TYPES = 21 , TYPE_UNKNOWN = 255 }
typedef qint64	UID

Public Member Functions
	KSEarthShadow (const KSMoon *moon, const KSSun *sun, const KSPlanet *earth)
void	calculateShadowRadius ()
double	findAngularSize () final override
bool	findGeocentricPosition (const KSNumbers *, const KSPlanetBase *Earth=nullptr) override
void	findMagnitude (const KSNumbers *) override
void	findPhase () override
ECLIPSE_TYPE	getEclipseType ()
double	getPenumbraAngSize () const
double	getUmbraAngSize () const
bool	isInEclipse ()
bool	loadData () override
bool	shouldUpdate ()
void	updateCoords ()
void	updateCoords (const KSNumbers *num, bool includePlanets=true, const CachingDms *lat=nullptr, const CachingDms *LST=nullptr, bool forceRecompute=false) override
Public Member Functions inherited from KSPlanetBase
	KSPlanetBase (const QString &s=i18n("unnamed"), const QString &image_file=QString(), const QColor &c=Qt::white, double pSize=0)
	~KSPlanetBase () override=default
double	angSize () const
QColor &	color ()
const dms &	ecLat () const
void	EclipticToEquatorial (const CachingDms *Obliquity)
const dms &	ecLong () const
void	EquatorialToEcliptic (const CachingDms *Obliquity)
void	findPosition (const KSNumbers *num, const CachingDms *lat=nullptr, const CachingDms *LST=nullptr, const KSPlanetBase *Earth=nullptr)
const dms &	helEcLat () const
const dms &	helEcLong () const
const QImage &	image () const
void	init (const QString &s, const QString &image_file, const QColor &c, double pSize)
bool	isMajorPlanet () const
double	labelOffset () const override
double	pa () const override
dms	phase ()
double	physicalSize () const
double	rearth () const
double	rsun () const
void	setAngularSize (double size)
void	setColor (const QColor &c)
void	setEcLat (dms elat)
void	setEcLong (dms elong)
void	setPA (double p)
void	setPhysicalSize (double size)
void	setRearth (const KSPlanetBase *Earth)
void	setRearth (double r)
void	setRsun (double r)
void	updateCoords (const KSNumbers *num, bool includePlanets=true, const CachingDms *lat=nullptr, const CachingDms *LST=nullptr, bool forceRecompute=false) override
Public Member Functions inherited from TrailObject
	TrailObject (int t, double r, double d, float m=0.0, const QString &n=QString())
	TrailObject (int t=TYPE_UNKNOWN, dms r=dms(0.0), dms d=dms(0.0), float m=0.0, const QString &n=QString())
void	addToTrail (const QString &label=QString())
void	clearTrail ()
void	clipTrail ()
TrailObject *	clone () const override
void	drawTrail (SkyPainter *skyp) const
bool	hasTrail () const
void	initPopupMenu (KSPopupMenu *pmenu) override
const QList< SkyPoint > &	trail () const
void	updateTrail (dms *LST, const dms *lat)
Public Member Functions inherited from SkyObject
	SkyObject (int t, double r, double d, float m=0.0, const QString &n=QString(), const QString &n2=QString(), const QString &lname=QString())
	SkyObject (int t=TYPE_UNKNOWN, dms r=dms(0.0), dms d=dms(0.0), float m=0.0, const QString &n=QString(), const QString &n2=QString(), const QString &lname=QString())
virtual	~SkyObject () override=default
virtual UID	getUID () const
bool	hashBeenUpdated ()
bool	hasLongName () const
bool	hasName () const
bool	hasName2 () const
bool	isSolarSystem () const
virtual QString	labelString () const
virtual QString	longname (void) const
float	mag () const
QString	messageFromTitle (const QString &imageTitle) const
virtual QString	name (void) const
QString	name2 (void) const
SkyPoint	recomputeCoords (const KStarsDateTime &dt, const GeoLocation *geo=nullptr) const
SkyPoint	recomputeHorizontalCoords (const KStarsDateTime &dt, const GeoLocation *geo) const
QTime	riseSetTime (const KStarsDateTime &dt, const GeoLocation *geo, bool rst, bool exact=true) const
dms	riseSetTimeAz (const KStarsDateTime &dt, const GeoLocation *geo, bool rst) const
QTime	riseSetTimeUT (const KStarsDateTime &dt, const GeoLocation *geo, bool rst, bool exact=true) const
void	setLongName (const QString &longname=QString())
void	setType (int t)
void	showPopupMenu (KSPopupMenu *pmenu, const QPoint &pos)
dms	transitAltitude (const KStarsDateTime &dt, const GeoLocation *geo) const
QTime	transitTime (const KStarsDateTime &dt, const GeoLocation *geo) const
QTime	transitTimeUT (const KStarsDateTime &dt, const GeoLocation *geo) const
QString	translatedLongName () const
QString	translatedName () const
QString	translatedName2 () const
int	type (void) const
QString	typeName () const
Public Member Functions inherited from SkyPoint
	SkyPoint ()
	SkyPoint (const CachingDms &r, const CachingDms &d)
	SkyPoint (const dms &r, const dms &d)
	SkyPoint (double r, double d)
void	aberrate (const KSNumbers *num, bool reverse=false)
void	addEterms (void)
double	airmass () const
const dms &	alt () const
dms	altRefracted () const
dms	angularDistanceTo (const SkyPoint *sp, double *const positionAngle=nullptr) const
void	apparentCoord (long double jd0, long double jdf)
const dms &	az () const
void	B1950ToJ2000 (void)
bool	bendlight ()
SkyPoint	catalogueCoord (long double jdf)
bool	checkBendLight ()
bool	checkCircumpolar (const dms *gLat) const
const CachingDms &	dec () const
const CachingDms &	dec0 () const
SkyPoint	deprecess (const KSNumbers *num, long double epoch=J2000)
void	Equatorial1950ToGalactic (dms &galLong, dms &galLat)
void	EquatorialToHorizontal (const CachingDms *LST, const CachingDms *lat)
void	EquatorialToHorizontal (const dms *LST, const dms *lat)
SkyPoint	Eterms (void)
void	findEcliptic (const CachingDms *Obliquity, dms &EcLong, dms &EcLat)
void	GalacticToEquatorial1950 (const dms *galLong, const dms *galLat)
long double	getLastPrecessJD () const
void	HorizontalToEquatorial (const dms *LST, const dms *lat)
bool	isValid () const
void	J2000ToB1950 (void)
double	maxAlt (const dms &lat) const
double	minAlt (const dms &lat) const
SkyPoint	moveAway (const SkyPoint &from, double dist) const
void	nutate (const KSNumbers *num, const bool reverse=false)
bool	operator== (SkyPoint &p) const
dms	parallacticAngle (const CachingDms &LST, const CachingDms &lat)
void	precessFromAnyEpoch (long double jd0, long double jdf)
const CachingDms &	ra () const
const CachingDms &	ra0 () const
void	set (const dms &r, const dms &d)
void	setAlt (dms alt)
void	setAlt (double alt)
void	setAltRefracted (dms alt_apparent)
void	setAltRefracted (double alt_apparent)
void	setAz (dms az)
void	setAz (double az)
void	setDec (const CachingDms &d)
void	setDec (dms d)
void	setDec (double d)
void	setDec0 (const CachingDms &d)
void	setDec0 (dms d)
void	setDec0 (double d)
void	setFromEcliptic (const CachingDms *Obliquity, const dms &EcLong, const dms &EcLat)
void	setRA (const CachingDms &r)
void	setRA (dms &r)
void	setRA (double r)
void	setRA0 (CachingDms r)
void	setRA0 (dms r)
void	setRA0 (double r)
void	subtractEterms (void)
virtual void	updateCoordsNow (const KSNumbers *num)
double	vGeocentric (double vhelio, long double jd)
double	vGeoToVHelio (double vgeo, long double jd)
double	vHeliocentric (double vlsr, long double jd)
double	vHelioToVlsr (double vhelio, long double jd)
double	vREarth (long double jd0)
double	vRSite (double vsite[3])
double	vRSun (long double jd)
double	vTopocentric (double vgeo, double vsite[3])
double	vTopoToVGeo (double vtopo, double vsite[3])

Additional Inherited Members
Static Public Member Functions inherited from KSPlanetBase
static KSPlanetBase *	createPlanet (int n)
Static Public Member Functions inherited from TrailObject
static void	clearTrailsExcept (SkyObject *o)
Static Public Member Functions inherited from SkyObject
static QString	typeName (const int t)
static QString	typeShortName (const int t)
Static Public Member Functions inherited from SkyPoint
static dms	findAltitude (const SkyPoint *p, const KStarsDateTime &dt, const GeoLocation *geo, const double hour=0)
static dms	refract (const dms alt, bool conditional=true)
static double	refract (const double alt, bool conditional=true)
static double	refractionCorr (double alt)
static SkyPoint	timeTransformed (const SkyPoint *p, const KStarsDateTime &dt, const GeoLocation *geo, const double hour=0)
static dms	unrefract (const dms alt, bool conditional=true)
static double	unrefract (const double alt, bool conditional=true)
Static Public Attributes inherited from KSPlanetBase
static QVector< QColor >	planetColor
Static Public Attributes inherited from TrailObject
static const int	MaxTrail = 400
Static Public Attributes inherited from SkyObject
static const UID	invalidUID = ~0
static const UID	UID_DEEPSKY = 2
static const UID	UID_GALAXY = 1
static const UID	UID_SOLARSYS = 3
static const UID	UID_STAR = 0
Static Public Attributes inherited from SkyPoint
static const double	altCrit = -1.0
static bool	implementationIsLibnova = false
Protected Member Functions inherited from KSPlanetBase
void	findPA (const KSNumbers *num)
UID	solarsysUID (UID type) const
Protected Member Functions inherited from SkyObject
void	setMag (float m)
void	setName (const QString &name)
void	setName2 (const QString &name2=QString())
Protected Member Functions inherited from SkyPoint
void	precess (const KSNumbers *num)
Protected Attributes inherited from KSPlanetBase
EclipticPosition	ep
EclipticPosition	helEcPos
QImage	m_image
double	Phase {NaN::d}
double	Rearth {NaN::d}
Protected Attributes inherited from TrailObject
QList< QString >	m_TrailLabels
QList< SkyPoint >	Trail
Protected Attributes inherited from SkyObject
bool	has_been_updated = true
QString	LongName
QString	Name
QString	Name2
Protected Attributes inherited from SkyPoint
long double	lastPrecessJD { 0 }
Static Protected Attributes inherited from KSPlanetBase
static const UID	UID_SOL_ASTEROID = 1
static const UID	UID_SOL_BIGOBJ = 0
static const UID	UID_SOL_COMET = 2
Static Protected Attributes inherited from TrailObject
static QSet< TrailObject * >	trailObjects

Detailed Description

A class that manages the calculation of the earths shadow (in moon distance) as a 'virtual' skyobject.

KSMoon is responsible for coordinating this object. While a rather unusual measure, this method ensures that unnecessary calculations are avoided.

Author

Valentin Boettcher

Version

1.0

Definition at line 27 of file ksearthshadow.h.

Member Enumeration Documentation

ECLIPSE_TYPE

enum KSEarthShadow::ECLIPSE_TYPE

The ECLIPSE_TYPE enum describes the quality of an eclipse.

Definition at line 45 of file ksearthshadow.h.

Constructor & Destructor Documentation

KSEarthShadow()

KSEarthShadow::KSEarthShadow	(	const KSMoon *	moon,
		const KSSun *	sun,
		const KSPlanet *	earth )

Parameters

moon	- an instance of KSMoon
sun	- an instance of KSSun
earth	- an instance of KSPlanet

Note

The three parameters must be supplied to avoid initialization order problems. This class may be generalized to any three bodies if it becomes necessary in the future. This class is relatively cheap, so it's save to create new instances instead of reusing an existing one.

Definition at line 10 of file ksearthshadow.cpp.

Member Function Documentation

calculateShadowRadius()

void KSEarthShadow::calculateShadowRadius

(

)

Updates umbra and penumbra radius from the positions of the three bodies.

Definition at line 71 of file ksearthshadow.cpp.

findAngularSize()

double KSEarthShadow::findAngularSize ( )

inlinefinaloverridevirtual

angSize

Returns

the angular size (penumbra) in arc minutes

Reimplemented from KSPlanetBase.

Definition at line 109 of file ksearthshadow.h.

findGeocentricPosition()

bool KSEarthShadow::findGeocentricPosition ( const KSNumbers * num, const KSPlanetBase * Earth = nullptr )

overridevirtual

find the object's current geocentric equatorial coordinates (RA and Dec) This function is pure virtual; it must be overloaded by subclasses.

This function is private; it is called by the public function findPosition() which also includes the figure-of-the-earth correction, localizeCoords().

Parameters

num	pointer to current KSNumbers object
Earth	pointer to planet Earth (needed to calculate geocentric coords)

Returns

true if position was successfully calculated.

Implements KSPlanetBase.

Definition at line 45 of file ksearthshadow.cpp.

findMagnitude()

void KSEarthShadow::findMagnitude ( const KSNumbers * num )

inlineoverridevirtual

Computes the visual magnitude for the major planets.

Parameters

num	pointer to a ksnumbers object. Needed for the saturn rings contribution to saturn's magnitude.

Implements KSPlanetBase.

Definition at line 116 of file ksearthshadow.h.

findPhase()

void KSEarthShadow::findPhase ( )

inlineoverridevirtual

Determine the phase of the planet.

Reimplemented from KSPlanetBase.

Definition at line 121 of file ksearthshadow.h.

getEclipseType()

KSEarthShadow::ECLIPSE_TYPE KSEarthShadow::getEclipseType

(

)

eclipse

Returns

The eclipse type.

See also

KSEarthShadow::ECLIPSE_TYPE

Definition at line 26 of file ksearthshadow.cpp.

getPenumbraAngSize()

double KSEarthShadow::getPenumbraAngSize ( ) const

inline

Returns

The angular radius of the penumbra.

Definition at line 100 of file ksearthshadow.h.

getUmbraAngSize()

double KSEarthShadow::getUmbraAngSize ( ) const

inline

Returns

The angular radius of the umbra.

Definition at line 92 of file ksearthshadow.h.

isInEclipse()

bool KSEarthShadow::isInEclipse

(

)

isInEclipse - a slim version of getEclipseType()

Returns

Whether the earth shadow eclipses the moon.

Definition at line 20 of file ksearthshadow.cpp.

loadData()

bool KSEarthShadow::loadData ( )

inlineoverridevirtual

Implements KSPlanetBase.

Definition at line 117 of file ksearthshadow.h.

shouldUpdate()

bool KSEarthShadow::shouldUpdate

(

)

The earths shadow on the moon appears only at new moon so calculating it on other occasions is rather pointless.

Returns

whether to update the shadow or not

Definition at line 15 of file ksearthshadow.cpp.

updateCoords() [1/2]

void KSEarthShadow::updateCoords

(

)

Update the RA/DEC of the shadow.

Definition at line 58 of file ksearthshadow.cpp.

updateCoords() [2/2]

void KSEarthShadow::updateCoords ( const KSNumbers * num, bool includePlanets = true, const CachingDms * lat = nullptr, const CachingDms * LST = nullptr, bool forceRecompute = false )

overridevirtual

Update the Coordinates of the shadow.

In truth it finds the sun and calls KSEarthShadow::updateCoords(const KSSun *)

Reimplemented from SkyPoint.

Definition at line 52 of file ksearthshadow.cpp.

---

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

• ksearthshadow.h
• ksearthshadow.cpp