Stellarium uses Julian Day numbers internally, and the conventional approach of using the Gregorian calendar for dates after 1582-10-15.
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virtual void | setJD (double JD) Q_DECL_OVERRIDE |
| | Set a calendar date from the Julian day number.
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| virtual void | setDate (QVector< int > parts) Q_DECL_OVERRIDE |
| | set date from a vector of calendar date elements sorted from the largest to the smallest. More...
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| virtual QStringList | getDateStrings () const Q_DECL_OVERRIDE |
| | get a stringlist of calendar date elements sorted from the largest to the smallest. More...
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virtual QString | getFormattedDateString () const Q_DECL_OVERRIDE |
| | get a formatted complete string for a date
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virtual void | retranslate () Q_DECL_OVERRIDE |
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virtual void | setJD (double JD) Q_DECL_OVERRIDE |
| | Set a calendar date from the Julian day number.
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| virtual void | setDate (QVector< int > parts) Q_DECL_OVERRIDE |
| | set date from a vector of calendar date elements sorted from the largest to the smallest. More...
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| virtual QStringList | getDateStrings () const Q_DECL_OVERRIDE |
| | get a stringlist of calendar date elements sorted from the largest to the smallest. More...
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virtual QString | getFormattedDateString () const Q_DECL_OVERRIDE |
| | get a formatted complete string for a date
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virtual void | retranslate ()=0 |
| | Translate e.g. stringlists of part names.
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virtual void | setJD (double JD)=0 |
| | Set a calendar date from the Julian day number Subclasses set JD and compute the parts and possibly other data This triggers the partsChanged() signal.
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virtual double | getJD () const |
| | Get Julian day number from a calendar date.
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| virtual void | setDate (QVector< int > parts)=0 |
| | set date from a vector of calendar date elements sorted from the largest to the smallest. More...
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| virtual QVector< int > | getDate () const |
| | get a vector of calendar date elements sorted from the largest to the smallest. More...
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| virtual QStringList | getDateStrings () const =0 |
| | get a stringlist of calendar date elements sorted from the largest to the smallest. More...
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virtual QString | getFormattedDateString () const |
| | get a formatted complete string for a date. The default implementation just concatenates all strings from getDateStrings() with a space in between.
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static bool | isLeap (int year) |
| | returns true for leap years
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| static int | fixedFromGregorian (QVector< int > gregorian) |
| | RD of January 1, AD1. More...
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static int | orthodoxEaster (int gYear) |
| | Orthodox Easter sunday (RD) from chapter 9.1.
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static int | easter (int gYear) |
| | Gregorian Easter sunday (RD) from chapter 9.2.
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static int | pentecost (int gYear) |
| | Return RD of Pentecost in Gregorian calendar.
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static QString | weekday (double jd) |
| | return name of week day. This is actually independent from any calendar, just a modulo of JD.
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static bool | isLeap (int year) |
| | returns true for leap years
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static int | fixedFromJulian (QVector< int > julian) |
| | find RD number for date in the Julian calendar (may be used in other calendars!)
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static QVector< int > | julianFromFixed (int rd) |
| | find date in the Julian calendar from RD number (may be used in other calendars!)
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| static double | momentFromJD (double jd, bool respectUTCoffset=true) |
| | Interfacing function from Reingold/Dershowitz: Calendrical Calculations Returns a "moment" in RD that represents JD. More...
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static int | fixedFromMoment (double rd) |
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static double | timeFromMoment (double rd) |
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| static int | fixedFromJD (double jd, bool respectUTCoffset=true) |
| | Interfacing function from Reingold/Dershowitz: Calendrical Calculations Returns a fixed date in RD that represents noon of JD. More...
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static double | momentFromMJD (double mjd) |
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| static double | jdFromMoment (double rd, bool respectUTCoffset=true) |
| | interfacing function from Reingold/Dershowitz: Calendrical Calculations Returns a JD from an RD "moment" (including fractions of day) Stellarium extension: optionally includes local time zone offset. More...
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| static double | jdFromFixed (double rd, bool respectUTCoffset=true) |
| | interfacing function from Reingold/Dershowitz: Calendrical Calculations Returns a JD from an RD "moment" (including fractions of day) Stellarium extension: optionally includes local time zone offset. More...
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static double | mjdFromFixed (double rd) |
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static int | dayOfWeekFromFixed (int rd) |
| | weekday from RD date. CC.UE(1.60).
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static int | kdayOnOrBefore (const Calendar::Day k, const int rd) |
| | @Returns the R.D. of the nearest weekday k on or before rd
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static int | kdayOnOrAfter (const Calendar::Day k, const int rd) |
| | @Returns the R.D. of the nearest weekday k on or after rd
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static int | kdayNearest (const Calendar::Day k, const int rd) |
| | @Returns the R.D. of the nearest weekday k around rd
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static int | kdayBefore (const Calendar::Day k, const int rd) |
| | @Returns the R.D. of the nearest weekday k before rd
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static int | kdayAfter (const Calendar::Day k, const int rd) |
| | @Returns the R.D. of the nearest weekday k after rd
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| static double | modInterval (double x, double a, double b) |
| | Interval modulus, CC.UE 1.24. More...
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static int | modInterval (int x, int a, int b) |
| | Interval modulus, CC.UE 1.24: This EXCLUDES the upper limit! Use StelUtils::amod(x, b) for CC's (x)mod[1..b].
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static int | rdCorrSum (QVector< int >parts, QVector< int >factors, int corr) |
| | Reingold-Dershowitz CC.UE 1.48.
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static QVector< int > | toRadix (int num, QVector< int >radix) |
| | Split integer to mixed-radix vector. Reingold-Dershowitz CC.UE 1.42.
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| enum | month {
january =1,
february,
march,
april,
may,
june,
july,
august,
september,
october,
november,
december
} |
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| enum | Day {
sunday = 0,
monday,
tuesday,
wednesday,
thursday,
friday,
saturday
} |
| | enum from CC.UE-ch1.12.
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| enum | Season { spring = 0,
summer = 90,
autumn = 180,
winter = 270
} |
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void | partsChanged (QVector< int > parts) |
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void | jdChanged (double jd) |
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double | JD |
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QVector< int > | parts |
| | date expressed as JD(UT), including day fraction (ready to interact with the main application)
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static QMap< int, QString > | weekDayNames |
| | RD of January 1, AD1.
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static QMap< int, QString > | monthNames |
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For dates before that, the Julian calendar is used, in the form finalized by Augustus and running unchanged since 8AD. Some European countries, especially the Protestant countries, delayed the calendar switch well into the 18th century. This implementation strictly follows CC. It provides the "Proleptic Gregorian Calendar" for dates before 1582-10-15. This may be helpful for a better estimate of seasons' beginnings in prehistory. However, also the Gregorian calendar is not perfect, and Neolithic and even earlier dates will still show deviations from the dates well-known from today.
Public Slots inherited from JulianCalendar
1.8.17