B4A Library PndCommonsSunCalc - [B4A/B4J] library for calculation of sun and moon positions and phases.

Lightweight, only requires Java 8 or higher, no other dependencies. Android compatible, requires API level 26 (Android 8.0 "Oreo") or higher.

Accuracy
Astronomical calculations are far more complex than throwing a few numbers into an obscure formula and then getting a fully accurate result. There is always a tradeoff between accuracy and computing time.
This library has its focus on getting acceptable results at low cost, so it can also run on mobile devices, or devices with a low computing power. The results have an accuracy of about a minute, which should be good enough for common applications (like sunrise/sunset timers), but is probably not sufficient for astronomical purposes.
If you are looking for the highest possible accuracy, you are looking for a different library.

Original library: https://github.com/shred/commons-suncalc
Wrapper is based on v3.5 version.

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PndCommonsSunCalc

Author:
Author: Richard Körber - B4A/B4J Wrapper: Pendrush
Version: 1.0
  • PndCommonsSunCalc
    • Fields:
      • MOONPHASE_PHASE_FIRST_QUARTER As org.shredzone.commons.suncalc.MoonPhase.Phase
        Waxing half moon
      • MOONPHASE_PHASE_FULL_MOON As org.shredzone.commons.suncalc.MoonPhase.Phase
        Full moon
      • MOONPHASE_PHASE_LAST_QUARTER As org.shredzone.commons.suncalc.MoonPhase.Phase
        Waning half moon
      • MOONPHASE_PHASE_NEW_MOON As org.shredzone.commons.suncalc.MoonPhase.Phase
        New moon
      • MOONPHASE_PHASE_WANING_CRESCENT As org.shredzone.commons.suncalc.MoonPhase.Phase
        Waning crescent moon
      • MOONPHASE_PHASE_WANING_GIBBOUS As org.shredzone.commons.suncalc.MoonPhase.Phase
        Waning gibbous moon
      • MOONPHASE_PHASE_WAXING_CRESCENT As org.shredzone.commons.suncalc.MoonPhase.Phase
        Waxing crescent moon
      • MOONPHASE_PHASE_WAXING_GIBBOUS As org.shredzone.commons.suncalc.MoonPhase.Phase
        Waxing gibbous moon
      • TWILIGHT_ASTRONOMICAL As org.shredzone.commons.suncalc.SunTimes.Twilight
        Astronomical twilight
      • TWILIGHT_BLUE_HOUR As org.shredzone.commons.suncalc.SunTimes.Twilight
        Transition from Golden Hour to Blue Hour
      • TWILIGHT_CIVIL As org.shredzone.commons.suncalc.SunTimes.Twilight
        Civil twilight
      • TWILIGHT_GOLDEN_HOUR As org.shredzone.commons.suncalc.SunTimes.Twilight
        Transition from daylight to Golden Hour
      • TWILIGHT_HORIZON As org.shredzone.commons.suncalc.SunTimes.Twilight
        The moment when the center of the sun crosses the horizon.
      • TWILIGHT_NAUTICAL As org.shredzone.commons.suncalc.SunTimes.Twilight
        Nautical twilight
      • TWILIGHT_NIGHT_HOUR As org.shredzone.commons.suncalc.SunTimes.Twilight
        Transition from Blue Hour to night
      • TWILIGHT_VISUAL As org.shredzone.commons.suncalc.SunTimes.Twilight
        The moment when the visual upper edge of the sun crosses the horizon. This is the default.
      • TWILIGHT_VISUAL_LOWER As org.shredzone.commons.suncalc.SunTimes.Twilight
        The moment when the visual lower edge of the sun crosses the horizon.
    • Functions:
      • Initialize
        Initialize PndCommonsSunCalc
      • MoonIllumination (Year As Int, Month As Int, Day As Int) As Double
        MoonIllumination - Calculates the illumination of the moon in percent.
        Year - Year
        Month - Month (1 = January, 2 = February, ...)
        Day - Day of month
      • MoonPhase (Year As Int, Month As Int, Day As Int, HowManyToFind As Int, MoonPhaseConst As org.shredzone.commons.suncalc.MoonPhase.Phase) As List
        MoonPhase - Calculates the date and time when the moon reaches the desired phase.
        Note: Due to the simplified formulas used in suncalc, the returned time can have an error of several minutes.
        Year - Year
        Month - Month (1 = January, 2 = February, ...)
        Day - Day of month
        HowManyToFind - How many result you want to be returned in the List
        MoonPhaseConst - Use on of the MOONPHASE_PHASE constants
      • MoonPhaseMicroMoon (Year As Int, Month As Int, Day As Int, HowManyToFind As Int) As List
        MoonPhaseMicroMoon - Checks if the moon is in a MicroMoon position.
        Note that there is no official definition of micromoon.
        Suncalc will assume a micromoon if the center of the moon is farther than 405,000 km from the center of Earth.
        Usually only full moons or new moons are candidates for micromoons.
        Year - Year
        Month - Month (1 = January, 2 = February, ...)
        Day - Day of month
        HowManyToFind - How many result you want to be returned in the List
      • MoonPhaseSuperMoon (Year As Int, Month As Int, Day As Int, HowManyToFind As Int) As List
        MoonPhaseSuperMoon - Checks if the moon is in a SuperMoon position.
        Note that there is no official definition of supermoon.
        Suncalc will assume a supermoon if the center of the moon is closer than 360,000 km to the center of Earth.
        Usually only full moons or new moons are candidates for supermoons.
        Year - Year
        Month - Month (1 = January, 2 = February, ...)
        Day - Day of month
        HowManyToFind - How many result you want to be returned in the List
      • MoonRise (Latitude As Double, Longitude As Double, Year As Int, Month As Int, Day As Int) As Long
        MoonRise - Moonrise time.
        Latitude - Latitude, in degrees
        Longitude - Longitude, in degrees
        Year - Year
        Month - Month (1 = January, 2 = February, ...)
        Day - Day of month
      • MoonSet (Latitude As Double, Longitude As Double, Year As Int, Month As Int, Day As Int) As Long
        MoonSet - Moonset time.
        Latitude - Latitude, in degrees
        Longitude - Longitude, in degrees
        Year - Year
        Month - Month (1 = January, 2 = February, ...)
        Day - Day of month
      • Sunrise (Latitude As Double, Longitude As Double, Year As Int, Month As Int, Day As Int) As Long
        Compute the sunrise.
        Latitude - Latitude, in degrees
        Longitude - Longitude, in degrees
        Year - Year
        Month - Month (1 = January, 2 = February, ...)
        Day - Day of month
      • Sunset (Latitude As Double, Longitude As Double, Year As Int, Month As Int, Day As Int) As Long
        Compute the sunset times.
        Latitude - Latitude, in degrees
        Longitude - Longitude, in degrees
        Year - Year
        Month - Month (1 = January, 2 = February, ...)
        Day - Day of month
      • TwilightRise (Latitude As Double, Longitude As Double, Year As Int, Month As Int, Day As Int, Twilight As org.shredzone.commons.suncalc.SunTimes.Twilight) As Long
        Twilight Rise
        The twilight angles use a geocentric reference, by definition.
        However, VISUAL and VISUAL_LOWER are topocentric, and take the spectator's height and the atmospheric refraction into account.
        Latitude - Latitude, in degrees
        Longitude - Longitude, in degrees
        Year - Year
        Month - Month (1 = January, 2 = February, ...)
        Day - Day of month
        Twilight - use one of the TWILIGHT constant
      • TwilightSet (Latitude As Double, Longitude As Double, Year As Int, Month As Int, Day As Int, TwilightConst As org.shredzone.commons.suncalc.SunTimes.Twilight) As Long
        Twilight Set
        The twilight angles use a geocentric reference, by definition.
        However, VISUAL and VISUAL_LOWER are topocentric, and take the spectator's height and the atmospheric refraction into account.
        Latitude - Latitude, in degrees
        Longitude - Longitude, in degrees
        Year - Year
        Month - Month (1 = January, 2 = February, ...)
        Day - Day of month
        Twilight - use one of the TWILIGHT constant
 

Attachments

  • Library-PndCommonsSunCalc.zip
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  • B4A-PndCommonsSunCalcExample.zip
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  • B4J-PndCommonsSunCalcExample.zip
    3.6 KB · Views: 33
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