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Chimp

standalone moon phase calculation

11 posts in this topic

#1 ·  Posted (edited)

I'm trying to translate this C listing found here http://www.voidware.com/phase.c to AutoIt.
.... i'm working on debugging a messy translation done by me, but it still doesn't work...
My question is: how this snippet could be translated to AutoIt??

double moon_phase(int year,int month,int day, double hour, int* ip)
{
    /*
      Calculates more accurately than Moon_phase , the phase of the moon at
      the given epoch.
      returns the moon phase as a real number (0-1)
      */

    double j= Julian(year,month,(double)day+hour/24.0)-2444238.5;
    double ls = sun_position(j);
    double lm = moon_position(j, ls);

    double t = lm - ls;
    if (t < 0) t += 360;
    *ip = (int)((t + 22.5)/45) & 0x7;
    return (1.0 - cos((lm - ls)*RAD))/2;
}

in particular this line :

*ip = (int)((t + 22.5)/45) & 0x7;

Thanks

Edited by Chimp

small minds discuss people average minds discuss events great minds discuss ideas.... and use AutoIt....

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I'm a C noop and I would interpret it this way:

Func Moon_Phase($year, $month, $day, $hour, ByRef $ip)
    Local $j = Julian($year, $month, $day + $hour / 24.0) - 2444238.5
    Local $ls = Sun_Position($j)
    Local $lm = Moon_Position($j, $ls)
    Local $t = $lm - $ls
    If ($t < 0) Then $t += 360
    $ip = BitAND(Int(($t + 22.5) / 45), 0x7)
    Return (1.0 - Cos(($lm - $ls) * $fRad)) / 2
EndFunc   ;==>Moon_Phase

I also tried to translate it to AutoIt but I don't know what "->" means:

now->day = c - e - g1;
    now->hour = (jd - jdi) * 24.0;
    if (g <= 13) now->month = g - 1;
    else now->month = g - 13;
    if (now->month > 2) now->year = d - 4716;
    else now->year = d - 4715;

 

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#3 ·  Posted (edited)

Hi @UEZ, thanks for your translation, it seems that it's ok that way.
Regarding the "->" syntax, seems that is a way to access variables within a structure.
I tried using a global array instead, and seems that it works as well.

The translation now is complete...(?), but according to the result produced by the original executable found herehttp://www.voidware.com/moon_phase.htm (see phase.exe near the bottom of the page) the results by this listing, are slight different.
I don't know if that is due to some imprecise in my translation or different precision in AutoIt math.... (???)

Anyway the moon phases provided by this listing are correct, have a look here for example to check: http://cycletourist.com/moon/lunar_calendar.php

fixes or improvements are welcome

Thanks everybody

EDIT: Listing corrected as suggested by LarsJ in post #4 and now works OK. (Thanks LarsJ :))

; http://www.voidware.com/phase.c
; /* standalone moon phase calculation */

Const $PI = 3.1415926535897932384626433832795
Const $RAD = ($PI / 180.0)
Const $SMALL_FLOAT = (1E-12)

Global $TimePlace[4] ; [0] Year ; [1] Month ; [2] ; Day ; [3] Hour
Global $ip

main()

Func JulianToDate($jd)

    $jd += 0.5
    $jdi = Int($jd)
    If ($jdi > 2299160) Then
        $a = Int(($jdi - 1867216.25) / 36524.25)
        $b = Int($jdi + 1 + $a - ($a / 4))
    Else
        $b = $jdi
    EndIf
    $c = $b + 1524;
    $d = Int(($c - 122.1) / 365.25) ;
    $e = Int(365.25 * $d) ;
    $g = Int(($c - $e) / 30.6001);
    $g1 = Int(30.6001 * $g) ;
    $TimePlace[2] = Int($c - $e - $g1) ; Day
    $TimePlace[3] = ($jd - $jdi) * 24 ; Hour
    If ($g <= 13) Then
        $TimePlace[1] = Int($g - 1) ; Month
    Else
        $TimePlace[1] = Int($g - 13) ; Month
    EndIf
    If $TimePlace[1] > 2 Then ; Month
        $TimePlace[0] = Int($d - 4716)
    Else
        $TimePlace[0] = Int($d - 4715); Year
    EndIf
EndFunc   ;==>JulianToDate

; double
Func Julian($year, $month, $day)

    Local $y = $year, $m = $month, $d = $day

    #cs   /*
        Returns the number of julian days for the specified day.
    #ce   */

    If ($month < 3) Then
        $year -= 1
        $month += 12
    EndIf

    If $year > 1582 Or ($year = 1582 And $month > 10) Or ($year = 1582 And $month = 10 And $day > 15) Then
        $a = Int($year / 100) ;
        $b = 2 - $a + Int($a / 4)
    EndIf

    $c = Int(365.25 * $year);
    $e = Int(30.6001 * ($month + 1))
    Return $b + $c + $e + $day + 1720994.5

EndFunc   ;==>Julian

Func sun_position($j)

    Local $dl
    $n = 360 / 365.2422 * $j
    $i = Int($n / 360)
    $n = $n - $i * 360.0
    $x = $n - 3.762863 ;
    If ($x < 0) Then $x += 360
    $x *= $RAD
    $e = $x

    #cs ; This while - wend replaced by the following Do Until loop
        ; as suggested by @LarsJ in post #4
    While Abs($dl) >= $SMALL_FLOAT
        $dl = $e - 0.016718 * Sin($e) - $x
        $e = $e - $dl / (1 - 0.016718 * Cos($e))
    WEnd
    #ce
    
    Do
        $dl = $e - 0.016718 * Sin($e) - $x
        $e = $e - $dl / (1 - 0.016718 * Cos($e))
    Until Abs($dl) < $SMALL_FLOAT

    $v = 360 / $PI * ATan(1.01686011182 * Tan($e / 2))
    $l = $v + 282.596403
    $i = Int($l / 360)
    $l = $l - $i * 360.0
    Return $l
EndFunc   ;==>sun_position

Func moon_position($j, $ls)
    ; /* ls = sun_position(j) */
    $ms = 0.985647332099 * $j - 3.762863
    If ($ms < 0) Then $ms += 360.0
    $l = 13.176396 * $j + 64.975464
    $i = Int($l / 360)
    $l = $l - $i * 360.0
    If ($l < 0) Then $l += 360.0
    $mm = $l - 0.1114041 * $j - 349.383063
    $i = Int($mm / 360)
    $mm -= $i * 360.0
    $n = 151.950429 - 0.0529539 * $j
    $i = Int($n / 360)
    $n -= $i * 360.0
    $ev = 1.2739 * Sin((2 * ($l - $ls) - $mm) * $RAD)
    $sms = Sin($ms * $RAD)
    $ae = 0.1858 * $sms
    $mm += $ev - $ae - 0.37 * $sms
    $ec = 6.2886 * Sin($mm * $RAD)
    $l += $ev + $ec - $ae + 0.214 * Sin(2 * $mm * $RAD)
    $l = 0.6583 * Sin(2 * ($l - $ls) * $RAD) + $l
    Return $l
EndFunc   ;==>moon_position

Func moon_phase($year, $month, $day, $hour, ByRef $ip)
    #cs  /*
        Calculates more accurately than Moon_phase , the phase of the moon at
        the given epoch.
        returns the moon phase as a real number (0-1)
    #ce  */

    $j = Julian($year, $month, $day + $hour / 24.0) - 2444238.5
    $ls = sun_position($j)
    $lm = moon_position($j, $ls)

    $t = $lm - $ls
    If ($t < 0) Then $t += 360 ;
    ; * ip = (int) ((t + 22.5) / 45) & 0x7 ;  <----- ????
    $ip = BitAND(Int(($t + 22.5) / 45), 0x7)
    Return (1.0 - Cos(($lm - $ls) * $RAD)) / 2
EndFunc   ;==>moon_phase

Func nextDay($y, $m, $d, $dd)
    $jd = Julian($y, $m, $d)
    $jd += $dd
    JulianToDate($jd) ; set result in $TimePlace[]
    #cs
        $y = $TimePlace[0] ; Year
        $m = $TimePlace[1] ; month
        $d = $TimePlace[2] ; day
    #ce
EndFunc   ;==>nextDay

Func main() ; {
    $y = @YEAR
    $m = @MON
    $d = @MDAY

    $step = 1
    $begun = 0

    $pmax = 0
    $pmin = 1
    $plast = 0

    ConsoleWrite("tabulation of the phase of the moon for one month" & @CRLF & @CRLF)

    ConsoleWrite("Year: " & $y & @CRLF)
    ConsoleWrite("month: " & $m & @CRLF)

    $d = 1
    $m0 = Int($m)

    ConsoleWrite(@CRLF & "Date       Time   Phase Segment" & @CRLF)

    While True
        For $h = 0 To 23 Step $step

            $p = moon_phase($y, $m, $d, $h, $ip)

            If ($begun) Then
                If ($p > $plast And $p > $pmax) Then
                    $pmax = $p
                    $ymax = $y
                    $mmax = $m
                    $dmax = $d
                    $hmax = $h
                ElseIf ($pmax) Then ; {
                    ConsoleWrite(StringFormat("%04d/%02d/%02d %02d:00          (fullest)\n", $ymax, $mmax, $dmax, $hmax))
                    $pmax = 0
                EndIf

                If ($p < $plast And $p < $pmin) Then
                    $pmin = $p
                    $ymin = $y
                    $mmin = $m
                    $dmin = $d
                    $hmin = $h
                ElseIf ($pmin < 1) Then
                    ConsoleWrite(StringFormat("%04d/%02d/%02d %02d:00          (newest)\n", $ymin, $mmin, $dmin, $hmin));
                    $pmin = 1.0
                EndIf

                If ($h = 16) Then
                    ConsoleWrite(StringFormat("%04d/%02d/%02d %02d:00 %5.1f%%   (%d)\n", $y, $m, $d, $h, Floor($p * 1000 + 0.5) / 10, $ip))
                EndIf
            Else
                $begun = 1
            EndIf
            $plast = $p;
        Next
        nextDay($y, $m, $d, 1.0);

        $y = $TimePlace[0] ; Year
        $m = $TimePlace[1] ; month
        $d = $TimePlace[2] ; day
        If ($m <> $m0) Then ExitLoop ; break
    WEnd
    Return 0;
EndFunc   ;==>main

 

Edited by Chimp
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#4 ·  Posted (edited)

Replace the While-WEnd loop in sun_position()

While Abs($dl) >= $SMALL_FLOAT
    $dl = $e - .016718 * Sin($e) - $x
    $e = $e - $dl / (1 - .016718 * Cos($e))
WEnd

with a Do-Until loop:

Do
    $dl = $e - .016718 * Sin($e) - $x
    $e = $e - $dl / (1 - .016718 * Cos($e))
Until Abs($dl) >= $SMALL_FLOAT

It guarantees that the calculation in the loop is done at least once.

 

On second thought: Just drop the loop and make sure that the calculation is done once.

Edited by LarsJ
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#5 ·  Posted (edited)

Shouldn't it be

Do
    $dl = $e - .016718 * Sin($e) - $x
    $e = $e - $dl / (1 - .016718 * Cos($e))
Until Abs($dl) < $SMALL_FLOAT

instead?

 

Btw, this is what I did yesterday but it's not working:

Global Const $fPI = ACos(-1), $fRad = $fPI / 180, $fSmall_Float = 1E-12
Global $tTimePlace = DllStructCreate("struct;int year;int month;int day;double hour;endstruct")

Func JulianToDate(ByRef $tTimePlace, $jd)
    Local $jdi, $a, $b, $c, $d, $e, $g, $g1
    $jd += 0.5
    $jdi = $jd
    If ($jdi > 2299160.0) Then
        $a = ($jdi - 1867216.25) / 36524.25
        $b = $jdi + 1 + $a - $a / 4
    Else
        $b = $jdi
    EndIf
    $c = $b + 1524
    $d = ($c - 122.1) / 365.25
    $e = 365 * $d
    $g = ($c - $e) / 30.6001
    $g1 = 30.6001 * $g

    $tTimePlace.day = Int($c - $e - $g1)
    $tTimePlace.hour = ($jd - $jdi) * 24.0
    If $g <= 13 Then
        $tTimePlace.month = Int($g - 1)
    Else
        $tTimePlace.month = Int($g - 13)
    EndIf
    If $tTimePlace.month > 2 Then
        $tTimePlace.year = Int($d - 4716)
    Else
        $tTimePlace.year = Int($d - 4715)
    EndIf
EndFunc   ;==>JulianToDate

Func Julian($year, $month, $day)
    Local $a, $b, $c, $e
    If $month < 3 Then
        $year -= 1
        $month += 12
    EndIf
    If ($year > 1582 Or ($year = 1582 And $month > 10) Or ($year = 1582 And $month = 10 And $day > 15)) Then
        $a = Int($year / 100)
        $b = Int(2 - $a + $a / 4)
    EndIf
    $c = Int(365.25 * $year)
    $e = Int(30.6001 * ($month + 1))
    Return $b + $c + $e + $day + 1720994.5
EndFunc   ;==>Julian

Func Sun_Position($j)
    Local $n, $x, $e, $l, $dl, $v, $m2, $i
    $n = 360 / 365.2422 * $j
    $i = Int($n / 360)
    $n = $n - $i * 360
    $x = $n - 3.762863
    If $x < 0 Then $x += 360
    $x *= $fRad
    $e = $x
    Do
        $dl = $e - 0.016718 * Sin($e) - $x
        $e = $e - $dl / (1 - 0.016718 * Cos($e))
    Until Abs($dl) < $fSmall_Float
    $v = 360 / $fPI * ATan(1.01686011182 * Tan($e / 2))
    $l = $v + 282.596403
    $i = Int($l / 360)
    $l = $l - $i * 360.0
    Return $l
EndFunc   ;==>Sun_Position

Func Moon_Position($j, $ls)
    Local $ms, $l, $mm, $n, $ev, $sms, $z, $x, $lm, $bm, $ae, $ec, $d, $ds, $as, $dm, $i
    $ms = 0.985647332099 * $j - 3.762863
    If ($ms < 0) Then $ms += 360.0
    $l = 13.176396 * $j + 64.975464
    $i = Int($l / 360)
    $l = $l - $i * 360.0
    If ($l < 0) Then $l += 360.0
    $mm = $l - 0.1114041 * $j - 349.383063
    $i = Int($mm / 360)
    $mm -= $i * 360.0
    $n = 151.950429 - 0.0529539 * $j
    $i = Int($n / 360)
    $n -= $i * 360.0
    $ev = 1.2739 * Sin((2 * ($l - $ls) - $mm) * $fRad)
    $sms = Sin($ms * $fRad)
    $ae = 0.1858 * $sms
    $mm += $ev - $ae - 0.37 * $sms
    $ec = 6.2886 * Sin($mm * $fRad)
    $l += $ev + $ec - $ae + 0.214 * Sin(2 * $mm * $fRad)
    $l = 0.6583 * Sin(2 * ($l - $ls) * $fRad) + $l
    Return $l
EndFunc   ;==>Moon_Position

Func Moon_Phase($year, $month, $day, $hour, ByRef $ip)
    Local $j = Julian($year, $month, $day + $hour / 24.0) - 2444238.5
    Local $ls = Sun_Position($j)
    Local $lm = Moon_Position($j, $ls)
    Local $t = $lm - $ls
    If ($t < 0) Then $t += 360
    $ip = BitAND(Int(($t + 22.5) / 45), 0x7)
    Return (1.0 - Cos(($lm - $ls) * $fRad)) / 2
EndFunc   ;==>Moon_Phase

Func NextDay(ByRef $y, ByRef $m, ByRef $d, $dd)
    Local $jd = Julian($y, $m, $d)
    $jd += $dd
    JulianToDate($tTimePlace, $jd)
    $y = $tTimePlace.year
    $m = $tTimePlace.month
    $d = $tTimePlace.day
EndFunc   ;==>NextDay

Func Main($y = @YEAR, $m = @MON)
    Local $d, $m0, $h, $i, $p, $ip = 0
    Local $step = 1, $begun = 0, $pmax = 0, $pmin = 1, $plast = 0
    Local $ymax, $mmax, $dmax, $hmax, $ymin, $mmin, $dmin, $hmin
    $d = 1
    $m0 = $m
    ConsoleWrite("Date       Time   Phase Segment" & @CRLF)
    Do
        $ip = 0
        For $h = 0 To 23 Step $step
            $p = Moon_Phase($y, $m, $d, $h, $ip)
            If $begun Then
                If ($p > $plast And $p > $pmax) Then
                    $pmax = $p
                    $ymax = Int($y)
                    $mmax = Int($m)
                    $dmax = Int($d)
                    $hmax = Int($h)
                ElseIf ($pmax) Then
                    ConsoleWrite(StringFormat("%04d/%02d/%02d %02d:00          (fullest)\n", $ymax, $mmax, $dmax, $hmax))
                    $pmax = 0
                ElseIf $p < $plast And $p < $pmin Then
                    $pmin = $p
                    $ymin = Int($y)
                    $mmin = Int($m)
                    $dmin = Int($d)
                    $hmin = Int($h)
                ElseIf $pmin < 1 Then
                    ConsoleWrite(StringFormat("%04d/%02d/%02d %02d:00          (newest)\n", $ymin, $mmin, $dmin, $hmin))
                    $pmin = 1.0
                EndIf
                If $h = 16 Then
                    ConsoleWrite(StringFormat("%04d/%02d/%02d %02d:00 %5.1f%%   (%d)\n", $y, $m, $d, $h, Floor($p * 1000 + 0.5) / 10, $ip))
                EndIf
            Else
                $begun = 1
            EndIf
            $plast = $p
        Next
        NextDay($y, $m, $d, 1.0)
        If ($m <> $m0) Then ExitLoop
    Until False
EndFunc   ;==>Main


Main()

I cannot find yet the mistakes...

Edited by UEZ

Please don't send me any personal message and ask for support! I will not reply!

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UEZ, You are right about the loop.

 

Your calculations in JulianToDate

$jd += 0.5
$jdi = $jd
If ($jdi > 2299160.0) Then
    $a = ($jdi - 1867216.25) / 36524.25
    $b = $jdi + 1 + $a - $a / 4
Else
    $b = $jdi
EndIf
$c = $b + 1524
$d = ($c - 122.1) / 365.25
$e = 365 * $d
$g = ($c - $e) / 30.6001
$g1 = 30.6001 * $g

will definitely not give the same results as these calculations by Chimp

$jd += 0.5
$jdi = Int($jd)
If ($jdi > 2299160) Then
    $a = Int(($jdi - 1867216.25) / 36524.25)
    $b = Int($jdi + 1 + $a - ($a / 4))
Else
    $b = $jdi
EndIf
$c = $b + 1524;
$d = Int(($c - 122.1) / 365.25) ;
$e = Int(365.25 * $d) ;
$g = Int(($c - $e) / 30.6001);
$g1 = Int(30.6001 * $g) ;

 

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#7 ·  Posted (edited)

Indeed LarsJ. :thumbsup:

When I run my script with the modification from above it seems to be "more or less equal" as from the C code:

AutoIt:

Date       Time   Phase Segment
2016/05/01 16:00  33.7%   (6)
2016/05/02 16:00  23.4%   (7)
2016/05/03 16:00  14.2%   (7)
2016/05/04 16:00   6.9%   (7)
2016/05/05 16:00   2.0%   (0)
2016/05/06 16:00   0.0%   (0)
2016/05/07 16:00   1.1%   (0)
2016/05/08 16:00   5.1%   (1)
2016/05/09 16:00  11.6%   (1)
2016/05/10 16:00  19.8%   (1)
2016/05/11 16:00  29.2%   (1)
2016/05/12 16:00  39.3%   (2)
2016/05/13 16:00  49.4%   (2)
2016/05/14 16:00  59.3%   (2)
2016/05/15 16:00  68.7%   (2)
2016/05/16 16:00  77.2%   (3)
2016/05/17 16:00  84.6%   (3)
2016/05/18 16:00  90.8%   (3)
2016/05/19 16:00  95.5%   (3)
2016/05/20 16:00  98.6%   (4)
2016/05/21 16:00 100.0%   (4)
2016/05/21 21:00          (fullest)
2016/05/06 19:00          (newest)
2016/05/22 16:00  99.4%   (4)
2016/05/23 16:00  97.0%   (4)
2016/05/24 16:00  92.6%   (5)
2016/05/25 16:00  86.5%   (5)
2016/05/26 16:00  78.7%   (5)
2016/05/27 16:00  69.5%   (5)
2016/05/28 16:00  59.2%   (6)
2016/05/29 16:00  48.3%   (6)
2016/05/30 16:00  37.1%   (6)
2016/05/31 16:00  26.4%   (7)

C:

tabulation of the phase of the moon for one month

year: 2016
month: 5

Date       Time   Phase Segment
2016/05/01 16:00  33.7%   (6)
2016/05/02 16:00  23.4%   (7)
2016/05/03 16:00  14.2%   (7)
2016/05/04 16:00   6.9%   (7)
2016/05/05 16:00   2.0%   (0)
2016/05/06 16:00   0.0%   (0)
2016/05/06 19:00          (newest)
2016/05/07 16:00   1.1%   (0)
2016/05/08 16:00   5.1%   (1)
2016/05/09 16:00  11.6%   (1)
2016/05/10 16:00  19.8%   (1)
2016/05/11 16:00  29.2%   (1)
2016/05/12 16:00  39.3%   (2)
2016/05/13 16:00  49.4%   (2)
2016/05/14 16:00  59.3%   (2)
2016/05/15 16:00  68.7%   (2)
2016/05/16 16:00  77.2%   (3)
2016/05/17 16:00  84.6%   (3)
2016/05/18 16:00  90.8%   (3)
2016/05/19 16:00  95.5%   (3)
2016/05/20 16:00  98.6%   (4)
2016/05/21 16:00 100.0%   (4)
2016/05/21 21:00          (fullest)
2016/05/22 16:00  99.4%   (4)
2016/05/23 16:00  97.0%   (4)
2016/05/24 16:00  92.6%   (5)
2016/05/25 16:00  86.5%   (5)
2016/05/26 16:00  78.7%   (5)
2016/05/27 16:00  69.5%   (5)
2016/05/28 16:00  59.2%   (6)
2016/05/29 16:00  48.3%   (6)
2016/05/30 16:00  37.1%   (6)
2016/05/31 16:00  26.4%   (7)

Time and sequment is not fully ok...

Edited by UEZ

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Ok, this seems to be creating the same result as the C code:

Global Const $fPI = ACos(-1), $fRad = $fPI / 180, $fSmall_Float = 1E-12
Global $tTimePlace = DllStructCreate("struct;int year;int month;int day;double hour;endstruct")

Func JulianToDate(ByRef $tTimePlace, $jd)
    Local $jdi, $a, $b, $c, $d, $e, $g, $g1
    $jd += 0.5
    $jdi = Int($jd)
    If ($jdi > 2299160) Then
        $a = Int(($jdi - 1867216.25) / 36524.25)
        $b = Int($jdi + 1 + $a - ($a / 4))
    Else
        $b = $jdi
    EndIf
    $c = $b + 1524;
    $d = Int(($c - 122.1) / 365.25)
    $e = Int(365.25 * $d)
    $g = Int(($c - $e) / 30.6001)
    $g1 = Int(30.6001 * $g)

    $tTimePlace.day = Int($c - $e - $g1)
    $tTimePlace.hour = ($jd - $jdi) * 24
    If $g <= 13 Then
        $tTimePlace.month = Int($g - 1)
    Else
        $tTimePlace.month = Int($g - 13)
    EndIf
    If $tTimePlace.month > 2 Then
        $tTimePlace.year = Int($d - 4716)
    Else
        $tTimePlace.year = Int($d - 4715)
    EndIf
EndFunc   ;==>JulianToDate

Func Julian($year, $month, $day)
    Local $a, $b, $c, $e
    If $month < 3 Then
        $year -= 1
        $month += 12
    EndIf
    If ($year > 1582 Or ($year = 1582 And $month > 10) Or ($year = 1582 And $month = 10 And $day > 15)) Then
        $a = ($year / 100)
        $b = Int(2 - $a + $a / 4)
    EndIf
    $c = Int(365.25 * $year)
    $e = Int(30.6001 * ($month + 1))
    Return $b + $c + $e + $day + 1720994.5
EndFunc   ;==>Julian

Func Sun_Position($j)
    Local $n, $x, $e, $l, $dl, $v, $m2, $i
    $n = 360 / 365.2422 * $j
    $i = Int($n / 360)
    $n = $n - $i * 360
    $x = $n - 3.762863
    If $x < 0 Then $x += 360
    $x *= $fRad
    $e = $x
    Do
        $dl = $e - 0.016718 * Sin($e) - $x
        $e = $e - $dl / (1 - 0.016718 * Cos($e))
    Until Abs($dl) < $fSmall_Float
    $v = 360 / $fPI * ATan(1.01686011182 * Tan($e / 2))
    $l = $v + 282.596403
    $i = Int($l / 360)
    $l = $l - $i * 360.0
    Return $l
EndFunc   ;==>Sun_Position

Func Moon_Position($j, $ls)
    Local $ms, $l, $mm, $n, $ev, $sms, $z, $x, $lm, $bm, $ae, $ec, $d, $ds, $as, $dm, $i
    $ms = 0.985647332099 * $j - 3.762863
    If ($ms < 0) Then $ms += 360.0
    $l = 13.176396 * $j + 64.975464
    $i = Int($l / 360)
    $l = $l - $i * 360.0
    If ($l < 0) Then $l += 360.0
    $mm = $l - 0.1114041 * $j - 349.383063
    $i = Int($mm / 360)
    $mm -= $i * 360.0
    $n = 151.950429 - 0.0529539 * $j
    $i = Int($n / 360)
    $n -= $i * 360.0
    $ev = 1.2739 * Sin((2 * ($l - $ls) - $mm) * $fRad)
    $sms = Sin($ms * $fRad)
    $ae = 0.1858 * $sms
    $mm += $ev - $ae - 0.37 * $sms
    $ec = 6.2886 * Sin($mm * $fRad)
    $l += $ev + $ec - $ae + 0.214 * Sin(2 * $mm * $fRad)
    $l = 0.6583 * Sin(2 * ($l - $ls) * $fRad) + $l
    Return $l
EndFunc   ;==>Moon_Position

Func Moon_Phase($year, $month, $day, $hour, ByRef $ip)
    Local $j = Julian($year, $month, $day + $hour / 24.0) - 2444238.5
    Local $ls = Sun_Position($j)
    Local $lm = Moon_Position($j, $ls)
    Local $t = $lm - $ls
    If ($t < 0) Then $t += 360
    $ip = BitAND(Int(($t + 22.5) / 45), 0x7)
    Return (1.0 - Cos(($lm - $ls) * $fRad)) / 2
EndFunc   ;==>Moon_Phase

Func NextDay(ByRef $y, ByRef $m, ByRef $d, $dd)
    Local $jd = Julian($y, $m, $d)
    $jd += $dd
    JulianToDate($tTimePlace, $jd)
    $y = $tTimePlace.year
    $m = $tTimePlace.month
    $d = $tTimePlace.day
EndFunc   ;==>NextDay

Func Main($y = @YEAR, $m = @MON)
    Local $d, $m0, $h, $i, $p, $ip = 0
    Local $step = 1, $begun = 0, $pmax = 0, $pmin = 1, $plast = 0
    Local $ymax, $mmax, $dmax, $hmax, $ymin, $mmin, $dmin, $hmin
    $d = 1
    $m0 = $m
    ConsoleWrite("tabulation of the phase of the moon for one month" & @CRLF & @CRLF)
    ConsoleWrite("Date       Time   Phase Segment" & @CRLF)
    Do
        For $h = 0 To 23 Step $step
            $p = Moon_Phase($y, $m, $d, $h, $ip)
            If $begun Then
                If ($p > $plast And $p > $pmax) Then
                    $pmax = $p
                    $ymax = ($y)
                    $mmax = ($m)
                    $dmax = ($d)
                    $hmax = ($h)
                ElseIf ($pmax) Then
                    ConsoleWrite(StringFormat("%04d/%02d/%02d %02d:00          (fullest)\n", $ymax, $mmax, $dmax, $hmax))
                    $pmax = 0
                EndIf

                If $p < $plast And $p < $pmin Then
                    $pmin = $p
                    $ymin = ($y)
                    $mmin = ($m)
                    $dmin = ($d)
                    $hmin = ($h)
                ElseIf $pmin < 1 Then
                    ConsoleWrite(StringFormat("%04d/%02d/%02d %02d:00          (newest)\n", $ymin, $mmin, $dmin, $hmin))
                    $pmin = 1.0
                EndIf
                If $h = 16 Then
                    ConsoleWrite(StringFormat("%04d/%02d/%02d %02d:00 %5.1f%%   (%d)\n", $y, $m, $d, $h, Floor($p * 1000 + 0.5) / 10, $ip))
                EndIf
            Else
                $begun = 1
            EndIf
            $plast = $p
        Next
        NextDay($y, $m, $d, 1)
        If ($m <> $m0) Then ExitLoop
    Until False
EndFunc   ;==>Main


Main()

 

1 person likes this

Please don't send me any personal message and ask for support! I will not reply!

Selection of finest graphical examples at Codepen.io

The own fart smells best!
Her 'sikim hıyar' diyene bir avuç tuz alıp koşma!
¯\_(ツ)_/¯  ٩(●̮̮̃•̃)۶ ٩(-̮̮̃-̃)۶ૐ

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#10 ·  Posted (edited)

Thanks @LarsJ, you are right about the loop, I've just changed While - Wend with Do - Until and result given by the script are exactly the same as the compiled original c script. Fixed script in post #3
Thanks @UEZ for the nice overall rearrangement of the script, Interesting the use of the DllStructCreate

...I will modify this script to be a general purpose function

Thanks

Edited by Chimp

small minds discuss people average minds discuss events great minds discuss ideas.... and use AutoIt....

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Nice jobs guys on this translation, i not understand all but i can see u have do nice progress.

Just a noob ask, what is the final use of the script ? Why u need this translation ? I'm just curious ^^

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