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Phase and fraction never become zero, How can I determine which is full moon and new moon ? #154

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indrajitv opened this issue Jul 4, 2021 · 1 comment
Open

Phase and fraction never become zero, How can I determine which is full moon and new moon ? #154

indrajitv opened this issue Jul 4, 2021 · 1 comment

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@indrajitv
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indrajitv commented Jul 4, 2021 •
edited 

 let sunCalc = SwiftySuncalc()
    var todayDate = Date()
    let localDateFormatter: DateFormatter = {
        let formatter = DateFormatter()
        formatter.timeZone = .current
        formatter.dateFormat = "MMM d yyyy"
        return formatter
    }()
    func getMoonIllumination() {
        
        for i in 1...360 {
            let illumination = sunCalc.getMoonIllumination(date: self.todayDate)
            if let phase = illumination["phase"],
               let angle = illumination["angle"],
               let fraction = illumination["fraction"] {
                print("phase \(phase) | angle \(angle) | fraction \(fraction) | day \(self.localDateFormatter.string(from: todayDate))")
            }
            todayDate = Date().addingTimeInterval(TimeInterval(i*24*60*60))
        }
    }

phase 0.8208798434751472 | angle 1.2205030548890408 | fraction 0.2846125787100251 | day Jul 4 2021
phase 0.8208830053193001 | angle 1.2205077774514717 | fraction 0.28460361441866144 | day Jul 5 2021
phase 0.8208832163668929 | angle 1.2205080926822833 | fraction 0.28460301607084565 | day Jul 6 2021
phase 0.8208833719187054 | angle 1.220508325022601 | fraction 0.2846025750611427 | day Jul 7 2021
phase 0.8208834934215778 | angle 1.2205085065059846 | fraction 0.2846022305847748 | day Jul 8 2021
phase 0.8208836735706424 | angle 1.2205087755872015 | fraction 0.284601719839094 | day Jul 9 2021
phase 0.8208838119284052 | angle 1.2205089822469763 | fraction 0.2846013275772954 | day Jul 10 2021
phase 0.8208845985176147 | angle 1.2205101571537502 | fraction 0.284599097500256 | day Jul 11 2021
phase 0.8208845985176147 | angle 1.2205101571537502 | fraction 0.284599097500256 | day Jul 12 2021
phase 0.8208845985176147 | angle 1.2205101571537502 | fraction 0.284599097500256 | day Jul 13 2021
phase 0.8208845985176147 | angle 1.2205101571537502 | fraction 0.284599097500256 | day Jul 14 2021
phase 0.8208845985176147 | angle 1.2205101571537502 | fraction 0.284599097500256 | day Jul 15 2021
phase 0.8208845985176147 | angle 1.2205101571537502 | fraction 0.284599097500256 | day Jul 16 2021
phase 0.8208845985176147 | angle 1.2205101571537502 | fraction 0.284599097500256 | day Jul 17 2021
phase 0.8208845985176147 | angle 1.2205101571537502 | fraction 0.284599097500256 | day Jul 18 2021
phase 0.8208845985176147 | angle 1.2205101571537502 | fraction 0.284599097500256 | day Jul 19 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 20 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 21 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 22 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 23 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 24 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 25 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 26 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 27 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 28 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 29 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 30 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Jul 31 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Aug 1 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Aug 2 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Aug 3 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Aug 4 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Aug 5 2021
phase 0.8208845988708059 | angle 1.2205101576813164 | fraction 0.28459909649891696 | day Aug 6 2021

Moon phase value should be interpreted like this:

Phase Name
0 New Moon
  Waxing Crescent
0.25 First Quarter
  Waxing Gibbous
0.5 Full Moon
  Waning Gibbous
0.75 Last Quarter
  Waning Crescent
@indrajitv indrajitv changed the title Phase and fraction never becomes zero, How can I determine which is full moon and new moon ? Phase and fraction never become zero, How can I determine which is full moon and new moon ? Jul 4, 2021
@Artoria2e5
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Wrong repository; go to https://github.com/cristiangonzales/SwiftySuncalc.

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@Artoria2e5 @indrajitv